From d20c7a53f1ccc7c24f0127ce201c79c0c640b7bc Mon Sep 17 00:00:00 2001 From: Gregorio Torrezan Date: Thu, 15 Oct 2026 20:29:26 -0300 Subject: [PATCH 1/5] Build PatchSDK and its tests for Android Make the whole package and the PatchSDKTests bundle compile and link for aarch64-unknown-linux-android28 (Swift SDK for Android / `skip android build`), with no behaviour change on Apple platforms. - Vendor Google's reference Brotli decoder (v1.2.0, MIT) as CBrotliDec and rewrite Brotli.swift on its streaming API, replacing Apple's Compression framework. Truncated streams and trailing bytes are now rejected. - Vendor the reference libbzip2 (1.0.8, sourceware.org) as the CBZ2 target, replacing the system-library shim; the Android NDK ships no libbz2. - Use apple/swift-crypto for SHA-256 where CryptoKit is unavailable (linked only on Android/Linux). - Import FoundationNetworking where URLSession/URLRequest are used. - Guard Darwin-only APIs: CoreFoundation number checks, Combine in UpdateState, ProcessInfo thermal/low-power, ObjC swizzles, Handoff. - Do not register KeychainBridge or relative_date_format off Apple platforms: a module importing them fails to instantiate and falls back, instead of pretending to work. - Tests that exercise Apple-only code use the same guard as that code. - Add proposals/android-support.md describing the approach and options. Verified: macOS suite 1031 tests, 0 failures; iOS Simulator build; Android build of all targets and the test bundle. Not yet run on a device/emulator. Co-Authored-By: Claude Opus 5.5 --- Package.resolved | 56 +- Package.swift | 50 +- Sources/CBZ2/LICENSE | 42 + Sources/CBZ2/README.md | 38 + Sources/CBZ2/include/bzlib.h | 282 + Sources/CBZ2/module.modulemap | 10 - Sources/CBZ2/shim.h | 4 - Sources/CBZ2/src/blocksort.c | 1094 +++ Sources/CBZ2/src/bzlib.c | 1572 +++++ Sources/CBZ2/src/bzlib_private.h | 509 ++ Sources/CBZ2/src/compress.c | 672 ++ Sources/CBZ2/src/crctable.c | 104 + Sources/CBZ2/src/decompress.c | 652 ++ Sources/CBZ2/src/huffman.c | 205 + Sources/CBZ2/src/randtable.c | 84 + Sources/CBrotliDec/LICENSE | 19 + Sources/CBrotliDec/README.md | 40 + Sources/CBrotliDec/common/constants.c | 15 + Sources/CBrotliDec/common/constants.h | 198 + Sources/CBrotliDec/common/context.c | 156 + Sources/CBrotliDec/common/context.h | 112 + Sources/CBrotliDec/common/dictionary.c | 64 + Sources/CBrotliDec/common/dictionary.h | 63 + Sources/CBrotliDec/common/dictionary_inc.h | 5847 +++++++++++++++++ Sources/CBrotliDec/common/platform.c | 19 + Sources/CBrotliDec/common/platform.h | 680 ++ Sources/CBrotliDec/common/shared_dictionary.c | 517 ++ .../common/shared_dictionary_internal.h | 75 + Sources/CBrotliDec/common/static_init.h | 56 + Sources/CBrotliDec/common/transform.c | 293 + Sources/CBrotliDec/common/transform.h | 84 + Sources/CBrotliDec/common/version.h | 51 + Sources/CBrotliDec/dec/bit_reader.c | 77 + Sources/CBrotliDec/dec/bit_reader.h | 419 ++ Sources/CBrotliDec/dec/decode.c | 2964 +++++++++ Sources/CBrotliDec/dec/huffman.c | 339 + Sources/CBrotliDec/dec/huffman.h | 120 + Sources/CBrotliDec/dec/prefix.c | 67 + Sources/CBrotliDec/dec/prefix.h | 43 + Sources/CBrotliDec/dec/prefix_inc.h | 707 ++ Sources/CBrotliDec/dec/state.c | 186 + Sources/CBrotliDec/dec/state.h | 396 ++ Sources/CBrotliDec/dec/static_init.c | 53 + Sources/CBrotliDec/dec/static_init.h | 30 + Sources/CBrotliDec/include/brotli/decode.h | 409 ++ Sources/CBrotliDec/include/brotli/port.h | 302 + .../include/brotli/shared_dictionary.h | 100 + Sources/CBrotliDec/include/brotli/types.h | 83 + Sources/PatchHostBridge/AsyncCallBroker.swift | 3 + Sources/PatchHostBridge/AsyncHostBridge.swift | 3 + Sources/PatchSDK/AnalyticsBridge.swift | 13 + Sources/PatchSDK/Bridges.swift | 28 +- Sources/PatchSDK/Brotli.swift | 97 +- Sources/PatchSDK/DiffApply.swift | 2 +- Sources/PatchSDK/FileDownloadBridge.swift | 3 + Sources/PatchSDK/HandoffBridge.swift | 7 +- Sources/PatchSDK/ModuleLoader.swift | 3 + Sources/PatchSDK/NetworkImageBridge.swift | 3 + Sources/PatchSDK/Patch.swift | 3 + Sources/PatchSDK/PatchHTTPBridge.swift | 3 + Sources/PatchSDK/ProcessInfoBridge.swift | 10 +- .../PatchSDK/ResourceOverlayRedirect.swift | 5 +- Sources/PatchSDK/SHA256.swift | 9 +- Sources/PatchSDK/UpdateChecker.swift | 3 + Sources/PatchSDK/UpdateState.swift | 21 +- .../AppKeyOnlyConfigurationTests.swift | 3 + Tests/PatchSDKTests/BugHuntSDK8Tests.swift | 3 + Tests/PatchSDKTests/BugHuntSDK9Tests.swift | 5 + .../PatchSDKTests/BugHuntSDKRound1Tests.swift | 2 + .../ColdStartMainThreadSafetyTests.swift | 4 + Tests/PatchSDKTests/DiffApplyTests.swift | 22 + .../FileDownloadBridgeTests.swift | 3 + .../GenericHostBridgeTests.swift | 7 +- .../HostBridgeActivationTests.swift | 4 + .../PatchSDKTests/HostBridgeFamilyTests.swift | 3 + .../HostBridgeVerticalSliceTests.swift | 4 + .../ImageFilterBridgeTests.swift | 6 + .../ImperativeUpdateFailureTests.swift | 3 + .../PatchSDKTests/ImperativeUpdateTests.swift | 3 + .../NetworkImageBridgeTests.swift | 3 + .../PDFGenerateBridgeTests.swift | 8 + .../PatchSDKTests/PatchHTTPBridgeTests.swift | 3 + .../PatchSDKTests/PatchIntegrationTests.swift | 3 + Tests/PatchSDKTests/PatchRenderTests.swift | 4 + .../PatchSDKTests/PatchViewModuleTests.swift | 4 + .../PatchSDKTests/QRGenerateBridgeTests.swift | 7 + .../ReloadFailurePreservesCurrentTests.swift | 3 + .../RenderCapabilitiesTests.swift | 6 +- .../StaticTemplateCacheTests.swift | 6 + Tests/PatchSDKTests/UpdateCheckerTests.swift | 3 + proposals/android-support.md | 255 + 91 files changed, 20473 insertions(+), 78 deletions(-) create mode 100644 Sources/CBZ2/LICENSE create mode 100644 Sources/CBZ2/README.md create mode 100644 Sources/CBZ2/include/bzlib.h delete mode 100644 Sources/CBZ2/module.modulemap delete mode 100644 Sources/CBZ2/shim.h create mode 100644 Sources/CBZ2/src/blocksort.c create mode 100644 Sources/CBZ2/src/bzlib.c create mode 100644 Sources/CBZ2/src/bzlib_private.h create mode 100644 Sources/CBZ2/src/compress.c create mode 100644 Sources/CBZ2/src/crctable.c create mode 100644 Sources/CBZ2/src/decompress.c create mode 100644 Sources/CBZ2/src/huffman.c create mode 100644 Sources/CBZ2/src/randtable.c create mode 100644 Sources/CBrotliDec/LICENSE create mode 100644 Sources/CBrotliDec/README.md create mode 100644 Sources/CBrotliDec/common/constants.c create mode 100644 Sources/CBrotliDec/common/constants.h create mode 100644 Sources/CBrotliDec/common/context.c create mode 100644 Sources/CBrotliDec/common/context.h create mode 100644 Sources/CBrotliDec/common/dictionary.c create mode 100644 Sources/CBrotliDec/common/dictionary.h create mode 100644 Sources/CBrotliDec/common/dictionary_inc.h create mode 100644 Sources/CBrotliDec/common/platform.c create mode 100644 Sources/CBrotliDec/common/platform.h create mode 100644 Sources/CBrotliDec/common/shared_dictionary.c create mode 100644 Sources/CBrotliDec/common/shared_dictionary_internal.h create mode 100644 Sources/CBrotliDec/common/static_init.h create mode 100644 Sources/CBrotliDec/common/transform.c create mode 100644 Sources/CBrotliDec/common/transform.h create mode 100644 Sources/CBrotliDec/common/version.h create mode 100644 Sources/CBrotliDec/dec/bit_reader.c create mode 100644 Sources/CBrotliDec/dec/bit_reader.h create mode 100644 Sources/CBrotliDec/dec/decode.c create mode 100644 Sources/CBrotliDec/dec/huffman.c create mode 100644 Sources/CBrotliDec/dec/huffman.h create mode 100644 Sources/CBrotliDec/dec/prefix.c create mode 100644 Sources/CBrotliDec/dec/prefix.h create mode 100644 Sources/CBrotliDec/dec/prefix_inc.h create mode 100644 Sources/CBrotliDec/dec/state.c create mode 100644 Sources/CBrotliDec/dec/state.h create mode 100644 Sources/CBrotliDec/dec/static_init.c create mode 100644 Sources/CBrotliDec/dec/static_init.h create mode 100644 Sources/CBrotliDec/include/brotli/decode.h create mode 100644 Sources/CBrotliDec/include/brotli/port.h create mode 100644 Sources/CBrotliDec/include/brotli/shared_dictionary.h create mode 100644 Sources/CBrotliDec/include/brotli/types.h create mode 100644 proposals/android-support.md diff --git a/Package.resolved b/Package.resolved index b9fbc6b..2cba3b2 100644 --- a/Package.resolved +++ b/Package.resolved @@ -1,5 +1,5 @@ { - "originHash" : "70f47c333877cb91c318b7a09d28192fd86aad978cf0c903fb09de95320a0e83", + "originHash" : "15e574de1e249c240346e35d63e692bfb180fc255f492c0ee12d65b587536e08", "pins" : [ { "identity" : "swift-argument-parser", @@ -10,6 +10,60 @@ "version" : "1.8.1" } }, + { + "identity" : "swift-asn1", + "kind" : "remoteSourceControl", + "location" : "https://github.com/apple/swift-asn1.git", + "state" : { + "revision" : "3b6410f7dee09eb33cdd26260c5fd47fda19b0e2", + "version" : "1.7.3" + } + }, + { + "identity" : "swift-atomics", + "kind" : "remoteSourceControl", + "location" : "https://github.com/apple/swift-atomics.git", + "state" : { + "revision" : "0442cb5a3f98ab802acb777929fdb446bda11a34", + "version" : "1.3.1" + } + }, + { + "identity" : "swift-collections", + "kind" : "remoteSourceControl", + "location" : "https://github.com/apple/swift-collections.git", + "state" : { + "revision" : "3b69cedbaa49957e97c092ae400bb57602ef941f", + "version" : "1.7.2" + } + }, + { + "identity" : "swift-crypto", + "kind" : "remoteSourceControl", + "location" : "https://github.com/apple/swift-crypto.git", + "state" : { + "revision" : "a9d1d5ab8951ada40cafff8c8e2b551dfde4f390", + "version" : "5.0.0" + } + }, + { + "identity" : "swift-log", + "kind" : "remoteSourceControl", + "location" : "https://github.com/apple/swift-log", + "state" : { + "revision" : "4038b6a4f74a1426f47eb1dd5b4bb5628a15d597", + "version" : "1.16.1" + } + }, + { + "identity" : "swift-nio", + "kind" : "remoteSourceControl", + "location" : "https://github.com/apple/swift-nio", + "state" : { + "revision" : "6db9d9abd92ad7399b8a564cafbb87d3507245fa", + "version" : "2.104.0" + } + }, { "identity" : "swift-system", "kind" : "remoteSourceControl", diff --git a/Package.swift b/Package.swift index af80249..01686fe 100644 --- a/Package.swift +++ b/Package.swift @@ -74,14 +74,40 @@ let package = Package( // TODO(remove-cap): once that PR (or an equivalent) ships in a WasmKit // release we depend on, DROP this `swift-system` constraint and let it // float again. Tracked in CLAUDE.md §5 / memory `wasmkit-swift-system-170-cap`. - .package(url: "https://github.com/apple/swift-system", "1.5.0" ..< "1.7.0") + .package(url: "https://github.com/apple/swift-system", "1.5.0" ..< "1.7.0"), + // Apple's swift-crypto: the CryptoKit API for platforms without CryptoKit + // (Android). Only linked on non-Apple platforms (see the `.when` conditions + // below); Apple builds keep using the system CryptoKit, so it adds nothing + // to an iOS app. Wide range so it rarely conflicts with a consumer's pin. + .package(url: "https://github.com/apple/swift-crypto.git", "3.0.0" ..< "6.0.0") ], targets: [ - // System-library shim for libbz2 (ships in the macOS + iOS SDKs). Used by - // the client-side bsdiff4 (BSDIFF40) diff applier to inflate the bz2 - // control/diff/extra blocks the backend produces. Pure system linkage — - // no third-party code, cross-compiles for iOS device + simulator. - .systemLibrary(name: "CBZ2", path: "Sources/CBZ2"), + // The reference libbzip2 (sourceware.org, 1.0.8, BSD-style license), + // vendored unmodified. Used by the client-side bsdiff4 (BSDIFF40) diff + // applier to inflate the bz2 control/diff/extra blocks the backend + // produces. Same library Apple ships as the SDK's libbz2, compiled from + // source so it also builds where no system libbz2 exists (Android NDK). + // See Sources/CBZ2/README.md for provenance and the update procedure. + .target( + name: "CBZ2", + path: "Sources/CBZ2", + exclude: ["LICENSE", "README.md"], + sources: ["src"], + publicHeadersPath: "include" + ), + + // Google's reference Brotli decoder (MIT, v1.2.0), vendored unmodified — + // decoder only, no encoder. Inflates the `.wasm.br` modules the backend + // serves. Replaces Apple's `Compression` framework so the same code path + // builds on non-Apple platforms (Android). See Sources/CBrotliDec/README.md + // for provenance and the update procedure. + .target( + name: "CBrotliDec", + path: "Sources/CBrotliDec", + exclude: ["LICENSE", "README.md"], + sources: ["common", "dec"], + publicHeadersPath: "include" + ), // The shared ViewNode IR (Breakthrough #3/#5). Pure Foundation `Codable` // value types — NO WasmKit, NO SwiftUI — so it compiles unchanged into @@ -162,7 +188,12 @@ let package = Package( // WasmKit PR #349 ships. iOS-safe (pure Swift). .product(name: "SystemPackage", package: "swift-system"), // libbz2 shim for diff decompression. - "CBZ2" + "CBZ2", + // Vendored Brotli decoder for module decompression. + "CBrotliDec", + // SHA-256 where CryptoKit is unavailable (SHA256.swift). + .product(name: "Crypto", package: "swift-crypto", + condition: .when(platforms: [.android, .linux])) ], resources: [ // Apple requires a privacy manifest from third-party SDKs. It is @@ -208,7 +239,10 @@ let package = Package( .product(name: "WasmKit", package: "WasmKit"), // WASI host shim — the generic-host-bridge tests instantiate the // real Swift-compiled guest fixture, which imports WASI Preview 1. - .product(name: "WasmKitWASI", package: "WasmKit") + .product(name: "WasmKitWASI", package: "WasmKit"), + // SHA-256 in tests where CryptoKit is unavailable. + .product(name: "Crypto", package: "swift-crypto", + condition: .when(platforms: [.android, .linux])) ], resources: [ // Real Swift-compiled .wasm fixtures used by the runtime tests. diff --git a/Sources/CBZ2/LICENSE b/Sources/CBZ2/LICENSE new file mode 100644 index 0000000..81a37ea --- /dev/null +++ b/Sources/CBZ2/LICENSE @@ -0,0 +1,42 @@ + +-------------------------------------------------------------------------- + +This program, "bzip2", the associated library "libbzip2", and all +documentation, are copyright (C) 1996-2019 Julian R Seward. All +rights reserved. + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions +are met: + +1. Redistributions of source code must retain the above copyright + notice, this list of conditions and the following disclaimer. + +2. The origin of this software must not be misrepresented; you must + not claim that you wrote the original software. If you use this + software in a product, an acknowledgment in the product + documentation would be appreciated but is not required. + +3. Altered source versions must be plainly marked as such, and must + not be misrepresented as being the original software. + +4. The name of the author may not be used to endorse or promote + products derived from this software without specific prior written + permission. + +THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS +OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED +WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY +DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE +GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS +INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, +WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING +NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS +SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +Julian Seward, jseward@acm.org +bzip2/libbzip2 version 1.0.8 of 13 July 2019 + +-------------------------------------------------------------------------- diff --git a/Sources/CBZ2/README.md b/Sources/CBZ2/README.md new file mode 100644 index 0000000..a100b99 --- /dev/null +++ b/Sources/CBZ2/README.md @@ -0,0 +1,38 @@ +# CBZ2 — vendored libbzip2 + +The reference bzip2 library (libbzip2), vendored unmodified so PatchSDK can +inflate the bz2 control/diff/extra blocks of BSDIFF40 patches on every platform. +Apple ships this same library as the SDK's `libbz2`; the Android NDK does not +ship it at all, so it is compiled from source here instead. + +| Field | Value | +| --- | --- | +| Upstream | https://sourceware.org/bzip2/ (git: https://sourceware.org/git/bzip2.git) | +| Version | 1.0.8 (tag `bzip2-1.0.8`) | +| Commit | 6a8690fc8d26c815e798c588f796eabe9d684cf0 | +| License | bzip2 license, BSD-style (see `LICENSE`) | + +## What was copied + +| Upstream path | Here | +| --- | --- | +| `blocksort.c`, `huffman.c`, `crctable.c`, `randtable.c`, `compress.c`, `decompress.c`, `bzlib.c` (the Makefile's `libbz2.a` objects) | `src/` | +| `bzlib_private.h` | `src/` | +| `bzlib.h` | `include/` | +| `LICENSE` | `LICENSE` | + +Not copied: the `bzip2` / `bzip2recover` command-line tools, tests, and docs. +The compressor sources are needed because `bzlib.c` references them. + +## Updating + +```sh +git clone --depth 1 --branch https://sourceware.org/git/bzip2.git /tmp/bzip2 +D=Sources/CBZ2 +cp /tmp/bzip2/{blocksort,huffman,crctable,randtable,compress,decompress,bzlib}.c /tmp/bzip2/bzlib_private.h $D/src/ +cp /tmp/bzip2/bzlib.h $D/include/ +cp /tmp/bzip2/LICENSE $D/LICENSE +``` + +Then update the version and commit in the table above. Do not edit the +vendored sources by hand. diff --git a/Sources/CBZ2/include/bzlib.h b/Sources/CBZ2/include/bzlib.h new file mode 100644 index 0000000..8966a6c --- /dev/null +++ b/Sources/CBZ2/include/bzlib.h @@ -0,0 +1,282 @@ + +/*-------------------------------------------------------------*/ +/*--- Public header file for the library. ---*/ +/*--- bzlib.h ---*/ +/*-------------------------------------------------------------*/ + +/* ------------------------------------------------------------------ + This file is part of bzip2/libbzip2, a program and library for + lossless, block-sorting data compression. + + bzip2/libbzip2 version 1.0.8 of 13 July 2019 + Copyright (C) 1996-2019 Julian Seward + + Please read the WARNING, DISCLAIMER and PATENTS sections in the + README file. + + This program is released under the terms of the license contained + in the file LICENSE. + ------------------------------------------------------------------ */ + + +#ifndef _BZLIB_H +#define _BZLIB_H + +#ifdef __cplusplus +extern "C" { +#endif + +#define BZ_RUN 0 +#define BZ_FLUSH 1 +#define BZ_FINISH 2 + +#define BZ_OK 0 +#define BZ_RUN_OK 1 +#define BZ_FLUSH_OK 2 +#define BZ_FINISH_OK 3 +#define BZ_STREAM_END 4 +#define BZ_SEQUENCE_ERROR (-1) +#define BZ_PARAM_ERROR (-2) +#define BZ_MEM_ERROR (-3) +#define BZ_DATA_ERROR (-4) +#define BZ_DATA_ERROR_MAGIC (-5) +#define BZ_IO_ERROR (-6) +#define BZ_UNEXPECTED_EOF (-7) +#define BZ_OUTBUFF_FULL (-8) +#define BZ_CONFIG_ERROR (-9) + +typedef + struct { + char *next_in; + unsigned int avail_in; + unsigned int total_in_lo32; + unsigned int total_in_hi32; + + char *next_out; + unsigned int avail_out; + unsigned int total_out_lo32; + unsigned int total_out_hi32; + + void *state; + + void *(*bzalloc)(void *,int,int); + void (*bzfree)(void *,void *); + void *opaque; + } + bz_stream; + + +#ifndef BZ_IMPORT +#define BZ_EXPORT +#endif + +#ifndef BZ_NO_STDIO +/* Need a definitition for FILE */ +#include +#endif + +#ifdef _WIN32 +# include +# ifdef small + /* windows.h define small to char */ +# undef small +# endif +# ifdef BZ_EXPORT +# define BZ_API(func) WINAPI func +# define BZ_EXTERN extern +# else + /* import windows dll dynamically */ +# define BZ_API(func) (WINAPI * func) +# define BZ_EXTERN +# endif +#else +# define BZ_API(func) func +# define BZ_EXTERN extern +#endif + + +/*-- Core (low-level) library functions --*/ + +BZ_EXTERN int BZ_API(BZ2_bzCompressInit) ( + bz_stream* strm, + int blockSize100k, + int verbosity, + int workFactor + ); + +BZ_EXTERN int BZ_API(BZ2_bzCompress) ( + bz_stream* strm, + int action + ); + +BZ_EXTERN int BZ_API(BZ2_bzCompressEnd) ( + bz_stream* strm + ); + +BZ_EXTERN int BZ_API(BZ2_bzDecompressInit) ( + bz_stream *strm, + int verbosity, + int small + ); + +BZ_EXTERN int BZ_API(BZ2_bzDecompress) ( + bz_stream* strm + ); + +BZ_EXTERN int BZ_API(BZ2_bzDecompressEnd) ( + bz_stream *strm + ); + + + +/*-- High(er) level library functions --*/ + +#ifndef BZ_NO_STDIO +#define BZ_MAX_UNUSED 5000 + +typedef void BZFILE; + +BZ_EXTERN BZFILE* BZ_API(BZ2_bzReadOpen) ( + int* bzerror, + FILE* f, + int verbosity, + int small, + void* unused, + int nUnused + ); + +BZ_EXTERN void BZ_API(BZ2_bzReadClose) ( + int* bzerror, + BZFILE* b + ); + +BZ_EXTERN void BZ_API(BZ2_bzReadGetUnused) ( + int* bzerror, + BZFILE* b, + void** unused, + int* nUnused + ); + +BZ_EXTERN int BZ_API(BZ2_bzRead) ( + int* bzerror, + BZFILE* b, + void* buf, + int len + ); + +BZ_EXTERN BZFILE* BZ_API(BZ2_bzWriteOpen) ( + int* bzerror, + FILE* f, + int blockSize100k, + int verbosity, + int workFactor + ); + +BZ_EXTERN void BZ_API(BZ2_bzWrite) ( + int* bzerror, + BZFILE* b, + void* buf, + int len + ); + +BZ_EXTERN void BZ_API(BZ2_bzWriteClose) ( + int* bzerror, + BZFILE* b, + int abandon, + unsigned int* nbytes_in, + unsigned int* nbytes_out + ); + +BZ_EXTERN void BZ_API(BZ2_bzWriteClose64) ( + int* bzerror, + BZFILE* b, + int abandon, + unsigned int* nbytes_in_lo32, + unsigned int* nbytes_in_hi32, + unsigned int* nbytes_out_lo32, + unsigned int* nbytes_out_hi32 + ); +#endif + + +/*-- Utility functions --*/ + +BZ_EXTERN int BZ_API(BZ2_bzBuffToBuffCompress) ( + char* dest, + unsigned int* destLen, + char* source, + unsigned int sourceLen, + int blockSize100k, + int verbosity, + int workFactor + ); + +BZ_EXTERN int BZ_API(BZ2_bzBuffToBuffDecompress) ( + char* dest, + unsigned int* destLen, + char* source, + unsigned int sourceLen, + int small, + int verbosity + ); + + +/*-- + Code contributed by Yoshioka Tsuneo (tsuneo@rr.iij4u.or.jp) + to support better zlib compatibility. + This code is not _officially_ part of libbzip2 (yet); + I haven't tested it, documented it, or considered the + threading-safeness of it. + If this code breaks, please contact both Yoshioka and me. +--*/ + +BZ_EXTERN const char * BZ_API(BZ2_bzlibVersion) ( + void + ); + +#ifndef BZ_NO_STDIO +BZ_EXTERN BZFILE * BZ_API(BZ2_bzopen) ( + const char *path, + const char *mode + ); + +BZ_EXTERN BZFILE * BZ_API(BZ2_bzdopen) ( + int fd, + const char *mode + ); + +BZ_EXTERN int BZ_API(BZ2_bzread) ( + BZFILE* b, + void* buf, + int len + ); + +BZ_EXTERN int BZ_API(BZ2_bzwrite) ( + BZFILE* b, + void* buf, + int len + ); + +BZ_EXTERN int BZ_API(BZ2_bzflush) ( + BZFILE* b + ); + +BZ_EXTERN void BZ_API(BZ2_bzclose) ( + BZFILE* b + ); + +BZ_EXTERN const char * BZ_API(BZ2_bzerror) ( + BZFILE *b, + int *errnum + ); +#endif + +#ifdef __cplusplus +} +#endif + +#endif + +/*-------------------------------------------------------------*/ +/*--- end bzlib.h ---*/ +/*-------------------------------------------------------------*/ diff --git a/Sources/CBZ2/module.modulemap b/Sources/CBZ2/module.modulemap deleted file mode 100644 index e6889df..0000000 --- a/Sources/CBZ2/module.modulemap +++ /dev/null @@ -1,10 +0,0 @@ -// System-library shim exposing libbz2 (bzlib.h) to Swift. libbz2 ships in both -// the macOS and iOS SDKs (`usr/lib/libbz2.tbd`, `usr/include/bzlib.h`), so this -// links on device + simulator with no third-party dependency. Used by -// BSDIFF40Patch to inflate the bz2 control/diff/extra streams in a backend -// bsdiff4 patch. -module CBZ2 [system] { - header "shim.h" - link "bz2" - export * -} diff --git a/Sources/CBZ2/shim.h b/Sources/CBZ2/shim.h deleted file mode 100644 index ec88f25..0000000 --- a/Sources/CBZ2/shim.h +++ /dev/null @@ -1,4 +0,0 @@ -// Umbrella header for the CBZ2 system-library target. bzlib.h is part of the -// macOS/iOS SDK; we only need the low-level one-shot decompression entry point -// (`BZ2_bzBuffToBuffDecompress`) for inflating bsdiff4's bz2 streams. -#include diff --git a/Sources/CBZ2/src/blocksort.c b/Sources/CBZ2/src/blocksort.c new file mode 100644 index 0000000..92d81fe --- /dev/null +++ b/Sources/CBZ2/src/blocksort.c @@ -0,0 +1,1094 @@ + +/*-------------------------------------------------------------*/ +/*--- Block sorting machinery ---*/ +/*--- blocksort.c ---*/ +/*-------------------------------------------------------------*/ + +/* ------------------------------------------------------------------ + This file is part of bzip2/libbzip2, a program and library for + lossless, block-sorting data compression. + + bzip2/libbzip2 version 1.0.8 of 13 July 2019 + Copyright (C) 1996-2019 Julian Seward + + Please read the WARNING, DISCLAIMER and PATENTS sections in the + README file. + + This program is released under the terms of the license contained + in the file LICENSE. + ------------------------------------------------------------------ */ + + +#include "bzlib_private.h" + +/*---------------------------------------------*/ +/*--- Fallback O(N log(N)^2) sorting ---*/ +/*--- algorithm, for repetitive blocks ---*/ +/*---------------------------------------------*/ + +/*---------------------------------------------*/ +static +__inline__ +void fallbackSimpleSort ( UInt32* fmap, + UInt32* eclass, + Int32 lo, + Int32 hi ) +{ + Int32 i, j, tmp; + UInt32 ec_tmp; + + if (lo == hi) return; + + if (hi - lo > 3) { + for ( i = hi-4; i >= lo; i-- ) { + tmp = fmap[i]; + ec_tmp = eclass[tmp]; + for ( j = i+4; j <= hi && ec_tmp > eclass[fmap[j]]; j += 4 ) + fmap[j-4] = fmap[j]; + fmap[j-4] = tmp; + } + } + + for ( i = hi-1; i >= lo; i-- ) { + tmp = fmap[i]; + ec_tmp = eclass[tmp]; + for ( j = i+1; j <= hi && ec_tmp > eclass[fmap[j]]; j++ ) + fmap[j-1] = fmap[j]; + fmap[j-1] = tmp; + } +} + + +/*---------------------------------------------*/ +#define fswap(zz1, zz2) \ + { Int32 zztmp = zz1; zz1 = zz2; zz2 = zztmp; } + +#define fvswap(zzp1, zzp2, zzn) \ +{ \ + Int32 yyp1 = (zzp1); \ + Int32 yyp2 = (zzp2); \ + Int32 yyn = (zzn); \ + while (yyn > 0) { \ + fswap(fmap[yyp1], fmap[yyp2]); \ + yyp1++; yyp2++; yyn--; \ + } \ +} + + +#define fmin(a,b) ((a) < (b)) ? (a) : (b) + +#define fpush(lz,hz) { stackLo[sp] = lz; \ + stackHi[sp] = hz; \ + sp++; } + +#define fpop(lz,hz) { sp--; \ + lz = stackLo[sp]; \ + hz = stackHi[sp]; } + +#define FALLBACK_QSORT_SMALL_THRESH 10 +#define FALLBACK_QSORT_STACK_SIZE 100 + + +static +void fallbackQSort3 ( UInt32* fmap, + UInt32* eclass, + Int32 loSt, + Int32 hiSt ) +{ + Int32 unLo, unHi, ltLo, gtHi, n, m; + Int32 sp, lo, hi; + UInt32 med, r, r3; + Int32 stackLo[FALLBACK_QSORT_STACK_SIZE]; + Int32 stackHi[FALLBACK_QSORT_STACK_SIZE]; + + r = 0; + + sp = 0; + fpush ( loSt, hiSt ); + + while (sp > 0) { + + AssertH ( sp < FALLBACK_QSORT_STACK_SIZE - 1, 1004 ); + + fpop ( lo, hi ); + if (hi - lo < FALLBACK_QSORT_SMALL_THRESH) { + fallbackSimpleSort ( fmap, eclass, lo, hi ); + continue; + } + + /* Random partitioning. Median of 3 sometimes fails to + avoid bad cases. Median of 9 seems to help but + looks rather expensive. This too seems to work but + is cheaper. Guidance for the magic constants + 7621 and 32768 is taken from Sedgewick's algorithms + book, chapter 35. + */ + r = ((r * 7621) + 1) % 32768; + r3 = r % 3; + if (r3 == 0) med = eclass[fmap[lo]]; else + if (r3 == 1) med = eclass[fmap[(lo+hi)>>1]]; else + med = eclass[fmap[hi]]; + + unLo = ltLo = lo; + unHi = gtHi = hi; + + while (1) { + while (1) { + if (unLo > unHi) break; + n = (Int32)eclass[fmap[unLo]] - (Int32)med; + if (n == 0) { + fswap(fmap[unLo], fmap[ltLo]); + ltLo++; unLo++; + continue; + }; + if (n > 0) break; + unLo++; + } + while (1) { + if (unLo > unHi) break; + n = (Int32)eclass[fmap[unHi]] - (Int32)med; + if (n == 0) { + fswap(fmap[unHi], fmap[gtHi]); + gtHi--; unHi--; + continue; + }; + if (n < 0) break; + unHi--; + } + if (unLo > unHi) break; + fswap(fmap[unLo], fmap[unHi]); unLo++; unHi--; + } + + AssertD ( unHi == unLo-1, "fallbackQSort3(2)" ); + + if (gtHi < ltLo) continue; + + n = fmin(ltLo-lo, unLo-ltLo); fvswap(lo, unLo-n, n); + m = fmin(hi-gtHi, gtHi-unHi); fvswap(unLo, hi-m+1, m); + + n = lo + unLo - ltLo - 1; + m = hi - (gtHi - unHi) + 1; + + if (n - lo > hi - m) { + fpush ( lo, n ); + fpush ( m, hi ); + } else { + fpush ( m, hi ); + fpush ( lo, n ); + } + } +} + +#undef fmin +#undef fpush +#undef fpop +#undef fswap +#undef fvswap +#undef FALLBACK_QSORT_SMALL_THRESH +#undef FALLBACK_QSORT_STACK_SIZE + + +/*---------------------------------------------*/ +/* Pre: + nblock > 0 + eclass exists for [0 .. nblock-1] + ((UChar*)eclass) [0 .. nblock-1] holds block + ptr exists for [0 .. nblock-1] + + Post: + ((UChar*)eclass) [0 .. nblock-1] holds block + All other areas of eclass destroyed + fmap [0 .. nblock-1] holds sorted order + bhtab [ 0 .. 2+(nblock/32) ] destroyed +*/ + +#define SET_BH(zz) bhtab[(zz) >> 5] |= ((UInt32)1 << ((zz) & 31)) +#define CLEAR_BH(zz) bhtab[(zz) >> 5] &= ~((UInt32)1 << ((zz) & 31)) +#define ISSET_BH(zz) (bhtab[(zz) >> 5] & ((UInt32)1 << ((zz) & 31))) +#define WORD_BH(zz) bhtab[(zz) >> 5] +#define UNALIGNED_BH(zz) ((zz) & 0x01f) + +static +void fallbackSort ( UInt32* fmap, + UInt32* eclass, + UInt32* bhtab, + Int32 nblock, + Int32 verb ) +{ + Int32 ftab[257]; + Int32 ftabCopy[256]; + Int32 H, i, j, k, l, r, cc, cc1; + Int32 nNotDone; + Int32 nBhtab; + UChar* eclass8 = (UChar*)eclass; + + /*-- + Initial 1-char radix sort to generate + initial fmap and initial BH bits. + --*/ + if (verb >= 4) + VPrintf0 ( " bucket sorting ...\n" ); + for (i = 0; i < 257; i++) ftab[i] = 0; + for (i = 0; i < nblock; i++) ftab[eclass8[i]]++; + for (i = 0; i < 256; i++) ftabCopy[i] = ftab[i]; + for (i = 1; i < 257; i++) ftab[i] += ftab[i-1]; + + for (i = 0; i < nblock; i++) { + j = eclass8[i]; + k = ftab[j] - 1; + ftab[j] = k; + fmap[k] = i; + } + + nBhtab = 2 + (nblock / 32); + for (i = 0; i < nBhtab; i++) bhtab[i] = 0; + for (i = 0; i < 256; i++) SET_BH(ftab[i]); + + /*-- + Inductively refine the buckets. Kind-of an + "exponential radix sort" (!), inspired by the + Manber-Myers suffix array construction algorithm. + --*/ + + /*-- set sentinel bits for block-end detection --*/ + for (i = 0; i < 32; i++) { + SET_BH(nblock + 2*i); + CLEAR_BH(nblock + 2*i + 1); + } + + /*-- the log(N) loop --*/ + H = 1; + while (1) { + + if (verb >= 4) + VPrintf1 ( " depth %6d has ", H ); + + j = 0; + for (i = 0; i < nblock; i++) { + if (ISSET_BH(i)) j = i; + k = fmap[i] - H; if (k < 0) k += nblock; + eclass[k] = j; + } + + nNotDone = 0; + r = -1; + while (1) { + + /*-- find the next non-singleton bucket --*/ + k = r + 1; + while (ISSET_BH(k) && UNALIGNED_BH(k)) k++; + if (ISSET_BH(k)) { + while (WORD_BH(k) == 0xffffffff) k += 32; + while (ISSET_BH(k)) k++; + } + l = k - 1; + if (l >= nblock) break; + while (!ISSET_BH(k) && UNALIGNED_BH(k)) k++; + if (!ISSET_BH(k)) { + while (WORD_BH(k) == 0x00000000) k += 32; + while (!ISSET_BH(k)) k++; + } + r = k - 1; + if (r >= nblock) break; + + /*-- now [l, r] bracket current bucket --*/ + if (r > l) { + nNotDone += (r - l + 1); + fallbackQSort3 ( fmap, eclass, l, r ); + + /*-- scan bucket and generate header bits-- */ + cc = -1; + for (i = l; i <= r; i++) { + cc1 = eclass[fmap[i]]; + if (cc != cc1) { SET_BH(i); cc = cc1; }; + } + } + } + + if (verb >= 4) + VPrintf1 ( "%6d unresolved strings\n", nNotDone ); + + H *= 2; + if (H > nblock || nNotDone == 0) break; + } + + /*-- + Reconstruct the original block in + eclass8 [0 .. nblock-1], since the + previous phase destroyed it. + --*/ + if (verb >= 4) + VPrintf0 ( " reconstructing block ...\n" ); + j = 0; + for (i = 0; i < nblock; i++) { + while (ftabCopy[j] == 0) j++; + ftabCopy[j]--; + eclass8[fmap[i]] = (UChar)j; + } + AssertH ( j < 256, 1005 ); +} + +#undef SET_BH +#undef CLEAR_BH +#undef ISSET_BH +#undef WORD_BH +#undef UNALIGNED_BH + + +/*---------------------------------------------*/ +/*--- The main, O(N^2 log(N)) sorting ---*/ +/*--- algorithm. Faster for "normal" ---*/ +/*--- non-repetitive blocks. ---*/ +/*---------------------------------------------*/ + +/*---------------------------------------------*/ +static +__inline__ +Bool mainGtU ( UInt32 i1, + UInt32 i2, + UChar* block, + UInt16* quadrant, + UInt32 nblock, + Int32* budget ) +{ + Int32 k; + UChar c1, c2; + UInt16 s1, s2; + + AssertD ( i1 != i2, "mainGtU" ); + /* 1 */ + c1 = block[i1]; c2 = block[i2]; + if (c1 != c2) return (c1 > c2); + i1++; i2++; + /* 2 */ + c1 = block[i1]; c2 = block[i2]; + if (c1 != c2) return (c1 > c2); + i1++; i2++; + /* 3 */ + c1 = block[i1]; c2 = block[i2]; + if (c1 != c2) return (c1 > c2); + i1++; i2++; + /* 4 */ + c1 = block[i1]; c2 = block[i2]; + if (c1 != c2) return (c1 > c2); + i1++; i2++; + /* 5 */ + c1 = block[i1]; c2 = block[i2]; + if (c1 != c2) return (c1 > c2); + i1++; i2++; + /* 6 */ + c1 = block[i1]; c2 = block[i2]; + if (c1 != c2) return (c1 > c2); + i1++; i2++; + /* 7 */ + c1 = block[i1]; c2 = block[i2]; + if (c1 != c2) return (c1 > c2); + i1++; i2++; + /* 8 */ + c1 = block[i1]; c2 = block[i2]; + if (c1 != c2) return (c1 > c2); + i1++; i2++; + /* 9 */ + c1 = block[i1]; c2 = block[i2]; + if (c1 != c2) return (c1 > c2); + i1++; i2++; + /* 10 */ + c1 = block[i1]; c2 = block[i2]; + if (c1 != c2) return (c1 > c2); + i1++; i2++; + /* 11 */ + c1 = block[i1]; c2 = block[i2]; + if (c1 != c2) return (c1 > c2); + i1++; i2++; + /* 12 */ + c1 = block[i1]; c2 = block[i2]; + if (c1 != c2) return (c1 > c2); + i1++; i2++; + + k = nblock + 8; + + do { + /* 1 */ + c1 = block[i1]; c2 = block[i2]; + if (c1 != c2) return (c1 > c2); + s1 = quadrant[i1]; s2 = quadrant[i2]; + if (s1 != s2) return (s1 > s2); + i1++; i2++; + /* 2 */ + c1 = block[i1]; c2 = block[i2]; + if (c1 != c2) return (c1 > c2); + s1 = quadrant[i1]; s2 = quadrant[i2]; + if (s1 != s2) return (s1 > s2); + i1++; i2++; + /* 3 */ + c1 = block[i1]; c2 = block[i2]; + if (c1 != c2) return (c1 > c2); + s1 = quadrant[i1]; s2 = quadrant[i2]; + if (s1 != s2) return (s1 > s2); + i1++; i2++; + /* 4 */ + c1 = block[i1]; c2 = block[i2]; + if (c1 != c2) return (c1 > c2); + s1 = quadrant[i1]; s2 = quadrant[i2]; + if (s1 != s2) return (s1 > s2); + i1++; i2++; + /* 5 */ + c1 = block[i1]; c2 = block[i2]; + if (c1 != c2) return (c1 > c2); + s1 = quadrant[i1]; s2 = quadrant[i2]; + if (s1 != s2) return (s1 > s2); + i1++; i2++; + /* 6 */ + c1 = block[i1]; c2 = block[i2]; + if (c1 != c2) return (c1 > c2); + s1 = quadrant[i1]; s2 = quadrant[i2]; + if (s1 != s2) return (s1 > s2); + i1++; i2++; + /* 7 */ + c1 = block[i1]; c2 = block[i2]; + if (c1 != c2) return (c1 > c2); + s1 = quadrant[i1]; s2 = quadrant[i2]; + if (s1 != s2) return (s1 > s2); + i1++; i2++; + /* 8 */ + c1 = block[i1]; c2 = block[i2]; + if (c1 != c2) return (c1 > c2); + s1 = quadrant[i1]; s2 = quadrant[i2]; + if (s1 != s2) return (s1 > s2); + i1++; i2++; + + if (i1 >= nblock) i1 -= nblock; + if (i2 >= nblock) i2 -= nblock; + + k -= 8; + (*budget)--; + } + while (k >= 0); + + return False; +} + + +/*---------------------------------------------*/ +/*-- + Knuth's increments seem to work better + than Incerpi-Sedgewick here. Possibly + because the number of elems to sort is + usually small, typically <= 20. +--*/ +static +Int32 incs[14] = { 1, 4, 13, 40, 121, 364, 1093, 3280, + 9841, 29524, 88573, 265720, + 797161, 2391484 }; + +static +void mainSimpleSort ( UInt32* ptr, + UChar* block, + UInt16* quadrant, + Int32 nblock, + Int32 lo, + Int32 hi, + Int32 d, + Int32* budget ) +{ + Int32 i, j, h, bigN, hp; + UInt32 v; + + bigN = hi - lo + 1; + if (bigN < 2) return; + + hp = 0; + while (incs[hp] < bigN) hp++; + hp--; + + for (; hp >= 0; hp--) { + h = incs[hp]; + + i = lo + h; + while (True) { + + /*-- copy 1 --*/ + if (i > hi) break; + v = ptr[i]; + j = i; + while ( mainGtU ( + ptr[j-h]+d, v+d, block, quadrant, nblock, budget + ) ) { + ptr[j] = ptr[j-h]; + j = j - h; + if (j <= (lo + h - 1)) break; + } + ptr[j] = v; + i++; + + /*-- copy 2 --*/ + if (i > hi) break; + v = ptr[i]; + j = i; + while ( mainGtU ( + ptr[j-h]+d, v+d, block, quadrant, nblock, budget + ) ) { + ptr[j] = ptr[j-h]; + j = j - h; + if (j <= (lo + h - 1)) break; + } + ptr[j] = v; + i++; + + /*-- copy 3 --*/ + if (i > hi) break; + v = ptr[i]; + j = i; + while ( mainGtU ( + ptr[j-h]+d, v+d, block, quadrant, nblock, budget + ) ) { + ptr[j] = ptr[j-h]; + j = j - h; + if (j <= (lo + h - 1)) break; + } + ptr[j] = v; + i++; + + if (*budget < 0) return; + } + } +} + + +/*---------------------------------------------*/ +/*-- + The following is an implementation of + an elegant 3-way quicksort for strings, + described in a paper "Fast Algorithms for + Sorting and Searching Strings", by Robert + Sedgewick and Jon L. Bentley. +--*/ + +#define mswap(zz1, zz2) \ + { Int32 zztmp = zz1; zz1 = zz2; zz2 = zztmp; } + +#define mvswap(zzp1, zzp2, zzn) \ +{ \ + Int32 yyp1 = (zzp1); \ + Int32 yyp2 = (zzp2); \ + Int32 yyn = (zzn); \ + while (yyn > 0) { \ + mswap(ptr[yyp1], ptr[yyp2]); \ + yyp1++; yyp2++; yyn--; \ + } \ +} + +static +__inline__ +UChar mmed3 ( UChar a, UChar b, UChar c ) +{ + UChar t; + if (a > b) { t = a; a = b; b = t; }; + if (b > c) { + b = c; + if (a > b) b = a; + } + return b; +} + +#define mmin(a,b) ((a) < (b)) ? (a) : (b) + +#define mpush(lz,hz,dz) { stackLo[sp] = lz; \ + stackHi[sp] = hz; \ + stackD [sp] = dz; \ + sp++; } + +#define mpop(lz,hz,dz) { sp--; \ + lz = stackLo[sp]; \ + hz = stackHi[sp]; \ + dz = stackD [sp]; } + + +#define mnextsize(az) (nextHi[az]-nextLo[az]) + +#define mnextswap(az,bz) \ + { Int32 tz; \ + tz = nextLo[az]; nextLo[az] = nextLo[bz]; nextLo[bz] = tz; \ + tz = nextHi[az]; nextHi[az] = nextHi[bz]; nextHi[bz] = tz; \ + tz = nextD [az]; nextD [az] = nextD [bz]; nextD [bz] = tz; } + + +#define MAIN_QSORT_SMALL_THRESH 20 +#define MAIN_QSORT_DEPTH_THRESH (BZ_N_RADIX + BZ_N_QSORT) +#define MAIN_QSORT_STACK_SIZE 100 + +static +void mainQSort3 ( UInt32* ptr, + UChar* block, + UInt16* quadrant, + Int32 nblock, + Int32 loSt, + Int32 hiSt, + Int32 dSt, + Int32* budget ) +{ + Int32 unLo, unHi, ltLo, gtHi, n, m, med; + Int32 sp, lo, hi, d; + + Int32 stackLo[MAIN_QSORT_STACK_SIZE]; + Int32 stackHi[MAIN_QSORT_STACK_SIZE]; + Int32 stackD [MAIN_QSORT_STACK_SIZE]; + + Int32 nextLo[3]; + Int32 nextHi[3]; + Int32 nextD [3]; + + sp = 0; + mpush ( loSt, hiSt, dSt ); + + while (sp > 0) { + + AssertH ( sp < MAIN_QSORT_STACK_SIZE - 2, 1001 ); + + mpop ( lo, hi, d ); + if (hi - lo < MAIN_QSORT_SMALL_THRESH || + d > MAIN_QSORT_DEPTH_THRESH) { + mainSimpleSort ( ptr, block, quadrant, nblock, lo, hi, d, budget ); + if (*budget < 0) return; + continue; + } + + med = (Int32) + mmed3 ( block[ptr[ lo ]+d], + block[ptr[ hi ]+d], + block[ptr[ (lo+hi)>>1 ]+d] ); + + unLo = ltLo = lo; + unHi = gtHi = hi; + + while (True) { + while (True) { + if (unLo > unHi) break; + n = ((Int32)block[ptr[unLo]+d]) - med; + if (n == 0) { + mswap(ptr[unLo], ptr[ltLo]); + ltLo++; unLo++; continue; + }; + if (n > 0) break; + unLo++; + } + while (True) { + if (unLo > unHi) break; + n = ((Int32)block[ptr[unHi]+d]) - med; + if (n == 0) { + mswap(ptr[unHi], ptr[gtHi]); + gtHi--; unHi--; continue; + }; + if (n < 0) break; + unHi--; + } + if (unLo > unHi) break; + mswap(ptr[unLo], ptr[unHi]); unLo++; unHi--; + } + + AssertD ( unHi == unLo-1, "mainQSort3(2)" ); + + if (gtHi < ltLo) { + mpush(lo, hi, d+1 ); + continue; + } + + n = mmin(ltLo-lo, unLo-ltLo); mvswap(lo, unLo-n, n); + m = mmin(hi-gtHi, gtHi-unHi); mvswap(unLo, hi-m+1, m); + + n = lo + unLo - ltLo - 1; + m = hi - (gtHi - unHi) + 1; + + nextLo[0] = lo; nextHi[0] = n; nextD[0] = d; + nextLo[1] = m; nextHi[1] = hi; nextD[1] = d; + nextLo[2] = n+1; nextHi[2] = m-1; nextD[2] = d+1; + + if (mnextsize(0) < mnextsize(1)) mnextswap(0,1); + if (mnextsize(1) < mnextsize(2)) mnextswap(1,2); + if (mnextsize(0) < mnextsize(1)) mnextswap(0,1); + + AssertD (mnextsize(0) >= mnextsize(1), "mainQSort3(8)" ); + AssertD (mnextsize(1) >= mnextsize(2), "mainQSort3(9)" ); + + mpush (nextLo[0], nextHi[0], nextD[0]); + mpush (nextLo[1], nextHi[1], nextD[1]); + mpush (nextLo[2], nextHi[2], nextD[2]); + } +} + +#undef mswap +#undef mvswap +#undef mpush +#undef mpop +#undef mmin +#undef mnextsize +#undef mnextswap +#undef MAIN_QSORT_SMALL_THRESH +#undef MAIN_QSORT_DEPTH_THRESH +#undef MAIN_QSORT_STACK_SIZE + + +/*---------------------------------------------*/ +/* Pre: + nblock > N_OVERSHOOT + block32 exists for [0 .. nblock-1 +N_OVERSHOOT] + ((UChar*)block32) [0 .. nblock-1] holds block + ptr exists for [0 .. nblock-1] + + Post: + ((UChar*)block32) [0 .. nblock-1] holds block + All other areas of block32 destroyed + ftab [0 .. 65536 ] destroyed + ptr [0 .. nblock-1] holds sorted order + if (*budget < 0), sorting was abandoned +*/ + +#define BIGFREQ(b) (ftab[((b)+1) << 8] - ftab[(b) << 8]) +#define SETMASK (1 << 21) +#define CLEARMASK (~(SETMASK)) + +static +void mainSort ( UInt32* ptr, + UChar* block, + UInt16* quadrant, + UInt32* ftab, + Int32 nblock, + Int32 verb, + Int32* budget ) +{ + Int32 i, j, k, ss, sb; + Int32 runningOrder[256]; + Bool bigDone[256]; + Int32 copyStart[256]; + Int32 copyEnd [256]; + UChar c1; + Int32 numQSorted; + UInt16 s; + if (verb >= 4) VPrintf0 ( " main sort initialise ...\n" ); + + /*-- set up the 2-byte frequency table --*/ + for (i = 65536; i >= 0; i--) ftab[i] = 0; + + j = block[0] << 8; + i = nblock-1; + for (; i >= 3; i -= 4) { + quadrant[i] = 0; + j = (j >> 8) | ( ((UInt16)block[i]) << 8); + ftab[j]++; + quadrant[i-1] = 0; + j = (j >> 8) | ( ((UInt16)block[i-1]) << 8); + ftab[j]++; + quadrant[i-2] = 0; + j = (j >> 8) | ( ((UInt16)block[i-2]) << 8); + ftab[j]++; + quadrant[i-3] = 0; + j = (j >> 8) | ( ((UInt16)block[i-3]) << 8); + ftab[j]++; + } + for (; i >= 0; i--) { + quadrant[i] = 0; + j = (j >> 8) | ( ((UInt16)block[i]) << 8); + ftab[j]++; + } + + /*-- (emphasises close relationship of block & quadrant) --*/ + for (i = 0; i < BZ_N_OVERSHOOT; i++) { + block [nblock+i] = block[i]; + quadrant[nblock+i] = 0; + } + + if (verb >= 4) VPrintf0 ( " bucket sorting ...\n" ); + + /*-- Complete the initial radix sort --*/ + for (i = 1; i <= 65536; i++) ftab[i] += ftab[i-1]; + + s = block[0] << 8; + i = nblock-1; + for (; i >= 3; i -= 4) { + s = (s >> 8) | (block[i] << 8); + j = ftab[s] -1; + ftab[s] = j; + ptr[j] = i; + s = (s >> 8) | (block[i-1] << 8); + j = ftab[s] -1; + ftab[s] = j; + ptr[j] = i-1; + s = (s >> 8) | (block[i-2] << 8); + j = ftab[s] -1; + ftab[s] = j; + ptr[j] = i-2; + s = (s >> 8) | (block[i-3] << 8); + j = ftab[s] -1; + ftab[s] = j; + ptr[j] = i-3; + } + for (; i >= 0; i--) { + s = (s >> 8) | (block[i] << 8); + j = ftab[s] -1; + ftab[s] = j; + ptr[j] = i; + } + + /*-- + Now ftab contains the first loc of every small bucket. + Calculate the running order, from smallest to largest + big bucket. + --*/ + for (i = 0; i <= 255; i++) { + bigDone [i] = False; + runningOrder[i] = i; + } + + { + Int32 vv; + Int32 h = 1; + do h = 3 * h + 1; while (h <= 256); + do { + h = h / 3; + for (i = h; i <= 255; i++) { + vv = runningOrder[i]; + j = i; + while ( BIGFREQ(runningOrder[j-h]) > BIGFREQ(vv) ) { + runningOrder[j] = runningOrder[j-h]; + j = j - h; + if (j <= (h - 1)) goto zero; + } + zero: + runningOrder[j] = vv; + } + } while (h != 1); + } + + /*-- + The main sorting loop. + --*/ + + numQSorted = 0; + + for (i = 0; i <= 255; i++) { + + /*-- + Process big buckets, starting with the least full. + Basically this is a 3-step process in which we call + mainQSort3 to sort the small buckets [ss, j], but + also make a big effort to avoid the calls if we can. + --*/ + ss = runningOrder[i]; + + /*-- + Step 1: + Complete the big bucket [ss] by quicksorting + any unsorted small buckets [ss, j], for j != ss. + Hopefully previous pointer-scanning phases have already + completed many of the small buckets [ss, j], so + we don't have to sort them at all. + --*/ + for (j = 0; j <= 255; j++) { + if (j != ss) { + sb = (ss << 8) + j; + if ( ! (ftab[sb] & SETMASK) ) { + Int32 lo = ftab[sb] & CLEARMASK; + Int32 hi = (ftab[sb+1] & CLEARMASK) - 1; + if (hi > lo) { + if (verb >= 4) + VPrintf4 ( " qsort [0x%x, 0x%x] " + "done %d this %d\n", + ss, j, numQSorted, hi - lo + 1 ); + mainQSort3 ( + ptr, block, quadrant, nblock, + lo, hi, BZ_N_RADIX, budget + ); + numQSorted += (hi - lo + 1); + if (*budget < 0) return; + } + } + ftab[sb] |= SETMASK; + } + } + + AssertH ( !bigDone[ss], 1006 ); + + /*-- + Step 2: + Now scan this big bucket [ss] so as to synthesise the + sorted order for small buckets [t, ss] for all t, + including, magically, the bucket [ss,ss] too. + This will avoid doing Real Work in subsequent Step 1's. + --*/ + { + for (j = 0; j <= 255; j++) { + copyStart[j] = ftab[(j << 8) + ss] & CLEARMASK; + copyEnd [j] = (ftab[(j << 8) + ss + 1] & CLEARMASK) - 1; + } + for (j = ftab[ss << 8] & CLEARMASK; j < copyStart[ss]; j++) { + k = ptr[j]-1; if (k < 0) k += nblock; + c1 = block[k]; + if (!bigDone[c1]) + ptr[ copyStart[c1]++ ] = k; + } + for (j = (ftab[(ss+1) << 8] & CLEARMASK) - 1; j > copyEnd[ss]; j--) { + k = ptr[j]-1; if (k < 0) k += nblock; + c1 = block[k]; + if (!bigDone[c1]) + ptr[ copyEnd[c1]-- ] = k; + } + } + + AssertH ( (copyStart[ss]-1 == copyEnd[ss]) + || + /* Extremely rare case missing in bzip2-1.0.0 and 1.0.1. + Necessity for this case is demonstrated by compressing + a sequence of approximately 48.5 million of character + 251; 1.0.0/1.0.1 will then die here. */ + (copyStart[ss] == 0 && copyEnd[ss] == nblock-1), + 1007 ) + + for (j = 0; j <= 255; j++) ftab[(j << 8) + ss] |= SETMASK; + + /*-- + Step 3: + The [ss] big bucket is now done. Record this fact, + and update the quadrant descriptors. Remember to + update quadrants in the overshoot area too, if + necessary. The "if (i < 255)" test merely skips + this updating for the last bucket processed, since + updating for the last bucket is pointless. + + The quadrant array provides a way to incrementally + cache sort orderings, as they appear, so as to + make subsequent comparisons in fullGtU() complete + faster. For repetitive blocks this makes a big + difference (but not big enough to be able to avoid + the fallback sorting mechanism, exponential radix sort). + + The precise meaning is: at all times: + + for 0 <= i < nblock and 0 <= j <= nblock + + if block[i] != block[j], + + then the relative values of quadrant[i] and + quadrant[j] are meaningless. + + else { + if quadrant[i] < quadrant[j] + then the string starting at i lexicographically + precedes the string starting at j + + else if quadrant[i] > quadrant[j] + then the string starting at j lexicographically + precedes the string starting at i + + else + the relative ordering of the strings starting + at i and j has not yet been determined. + } + --*/ + bigDone[ss] = True; + + if (i < 255) { + Int32 bbStart = ftab[ss << 8] & CLEARMASK; + Int32 bbSize = (ftab[(ss+1) << 8] & CLEARMASK) - bbStart; + Int32 shifts = 0; + + while ((bbSize >> shifts) > 65534) shifts++; + + for (j = bbSize-1; j >= 0; j--) { + Int32 a2update = ptr[bbStart + j]; + UInt16 qVal = (UInt16)(j >> shifts); + quadrant[a2update] = qVal; + if (a2update < BZ_N_OVERSHOOT) + quadrant[a2update + nblock] = qVal; + } + AssertH ( ((bbSize-1) >> shifts) <= 65535, 1002 ); + } + + } + + if (verb >= 4) + VPrintf3 ( " %d pointers, %d sorted, %d scanned\n", + nblock, numQSorted, nblock - numQSorted ); +} + +#undef BIGFREQ +#undef SETMASK +#undef CLEARMASK + + +/*---------------------------------------------*/ +/* Pre: + nblock > 0 + arr2 exists for [0 .. nblock-1 +N_OVERSHOOT] + ((UChar*)arr2) [0 .. nblock-1] holds block + arr1 exists for [0 .. nblock-1] + + Post: + ((UChar*)arr2) [0 .. nblock-1] holds block + All other areas of block destroyed + ftab [ 0 .. 65536 ] destroyed + arr1 [0 .. nblock-1] holds sorted order +*/ +void BZ2_blockSort ( EState* s ) +{ + UInt32* ptr = s->ptr; + UChar* block = s->block; + UInt32* ftab = s->ftab; + Int32 nblock = s->nblock; + Int32 verb = s->verbosity; + Int32 wfact = s->workFactor; + UInt16* quadrant; + Int32 budget; + Int32 budgetInit; + Int32 i; + + if (nblock < 10000) { + fallbackSort ( s->arr1, s->arr2, ftab, nblock, verb ); + } else { + /* Calculate the location for quadrant, remembering to get + the alignment right. Assumes that &(block[0]) is at least + 2-byte aligned -- this should be ok since block is really + the first section of arr2. + */ + i = nblock+BZ_N_OVERSHOOT; + if (i & 1) i++; + quadrant = (UInt16*)(&(block[i])); + + /* (wfact-1) / 3 puts the default-factor-30 + transition point at very roughly the same place as + with v0.1 and v0.9.0. + Not that it particularly matters any more, since the + resulting compressed stream is now the same regardless + of whether or not we use the main sort or fallback sort. + */ + if (wfact < 1 ) wfact = 1; + if (wfact > 100) wfact = 100; + budgetInit = nblock * ((wfact-1) / 3); + budget = budgetInit; + + mainSort ( ptr, block, quadrant, ftab, nblock, verb, &budget ); + if (verb >= 3) + VPrintf3 ( " %d work, %d block, ratio %5.2f\n", + budgetInit - budget, + nblock, + (float)(budgetInit - budget) / + (float)(nblock==0 ? 1 : nblock) ); + if (budget < 0) { + if (verb >= 2) + VPrintf0 ( " too repetitive; using fallback" + " sorting algorithm\n" ); + fallbackSort ( s->arr1, s->arr2, ftab, nblock, verb ); + } + } + + s->origPtr = -1; + for (i = 0; i < s->nblock; i++) + if (ptr[i] == 0) + { s->origPtr = i; break; }; + + AssertH( s->origPtr != -1, 1003 ); +} + + +/*-------------------------------------------------------------*/ +/*--- end blocksort.c ---*/ +/*-------------------------------------------------------------*/ diff --git a/Sources/CBZ2/src/bzlib.c b/Sources/CBZ2/src/bzlib.c new file mode 100644 index 0000000..2178655 --- /dev/null +++ b/Sources/CBZ2/src/bzlib.c @@ -0,0 +1,1572 @@ + +/*-------------------------------------------------------------*/ +/*--- Library top-level functions. ---*/ +/*--- bzlib.c ---*/ +/*-------------------------------------------------------------*/ + +/* ------------------------------------------------------------------ + This file is part of bzip2/libbzip2, a program and library for + lossless, block-sorting data compression. + + bzip2/libbzip2 version 1.0.8 of 13 July 2019 + Copyright (C) 1996-2019 Julian Seward + + Please read the WARNING, DISCLAIMER and PATENTS sections in the + README file. + + This program is released under the terms of the license contained + in the file LICENSE. + ------------------------------------------------------------------ */ + +/* CHANGES + 0.9.0 -- original version. + 0.9.0a/b -- no changes in this file. + 0.9.0c -- made zero-length BZ_FLUSH work correctly in bzCompress(). + fixed bzWrite/bzRead to ignore zero-length requests. + fixed bzread to correctly handle read requests after EOF. + wrong parameter order in call to bzDecompressInit in + bzBuffToBuffDecompress. Fixed. +*/ + +#include "bzlib_private.h" + + +/*---------------------------------------------------*/ +/*--- Compression stuff ---*/ +/*---------------------------------------------------*/ + + +/*---------------------------------------------------*/ +#ifndef BZ_NO_STDIO +void BZ2_bz__AssertH__fail ( int errcode ) +{ + fprintf(stderr, + "\n\nbzip2/libbzip2: internal error number %d.\n" + "This is a bug in bzip2/libbzip2, %s.\n" + "Please report it to: bzip2-devel@sourceware.org. If this happened\n" + "when you were using some program which uses libbzip2 as a\n" + "component, you should also report this bug to the author(s)\n" + "of that program. Please make an effort to report this bug;\n" + "timely and accurate bug reports eventually lead to higher\n" + "quality software. Thanks.\n\n", + errcode, + BZ2_bzlibVersion() + ); + + if (errcode == 1007) { + fprintf(stderr, + "\n*** A special note about internal error number 1007 ***\n" + "\n" + "Experience suggests that a common cause of i.e. 1007\n" + "is unreliable memory or other hardware. The 1007 assertion\n" + "just happens to cross-check the results of huge numbers of\n" + "memory reads/writes, and so acts (unintendedly) as a stress\n" + "test of your memory system.\n" + "\n" + "I suggest the following: try compressing the file again,\n" + "possibly monitoring progress in detail with the -vv flag.\n" + "\n" + "* If the error cannot be reproduced, and/or happens at different\n" + " points in compression, you may have a flaky memory system.\n" + " Try a memory-test program. I have used Memtest86\n" + " (www.memtest86.com). At the time of writing it is free (GPLd).\n" + " Memtest86 tests memory much more thorougly than your BIOSs\n" + " power-on test, and may find failures that the BIOS doesn't.\n" + "\n" + "* If the error can be repeatably reproduced, this is a bug in\n" + " bzip2, and I would very much like to hear about it. Please\n" + " let me know, and, ideally, save a copy of the file causing the\n" + " problem -- without which I will be unable to investigate it.\n" + "\n" + ); + } + + exit(3); +} +#endif + + +/*---------------------------------------------------*/ +static +int bz_config_ok ( void ) +{ + if (sizeof(int) != 4) return 0; + if (sizeof(short) != 2) return 0; + if (sizeof(char) != 1) return 0; + return 1; +} + + +/*---------------------------------------------------*/ +static +void* default_bzalloc ( void* opaque, Int32 items, Int32 size ) +{ + void* v = malloc ( items * size ); + return v; +} + +static +void default_bzfree ( void* opaque, void* addr ) +{ + if (addr != NULL) free ( addr ); +} + + +/*---------------------------------------------------*/ +static +void prepare_new_block ( EState* s ) +{ + Int32 i; + s->nblock = 0; + s->numZ = 0; + s->state_out_pos = 0; + BZ_INITIALISE_CRC ( s->blockCRC ); + for (i = 0; i < 256; i++) s->inUse[i] = False; + s->blockNo++; +} + + +/*---------------------------------------------------*/ +static +void init_RL ( EState* s ) +{ + s->state_in_ch = 256; + s->state_in_len = 0; +} + + +static +Bool isempty_RL ( EState* s ) +{ + if (s->state_in_ch < 256 && s->state_in_len > 0) + return False; else + return True; +} + + +/*---------------------------------------------------*/ +int BZ_API(BZ2_bzCompressInit) + ( bz_stream* strm, + int blockSize100k, + int verbosity, + int workFactor ) +{ + Int32 n; + EState* s; + + if (!bz_config_ok()) return BZ_CONFIG_ERROR; + + if (strm == NULL || + blockSize100k < 1 || blockSize100k > 9 || + workFactor < 0 || workFactor > 250) + return BZ_PARAM_ERROR; + + if (workFactor == 0) workFactor = 30; + if (strm->bzalloc == NULL) strm->bzalloc = default_bzalloc; + if (strm->bzfree == NULL) strm->bzfree = default_bzfree; + + s = BZALLOC( sizeof(EState) ); + if (s == NULL) return BZ_MEM_ERROR; + s->strm = strm; + + s->arr1 = NULL; + s->arr2 = NULL; + s->ftab = NULL; + + n = 100000 * blockSize100k; + s->arr1 = BZALLOC( n * sizeof(UInt32) ); + s->arr2 = BZALLOC( (n+BZ_N_OVERSHOOT) * sizeof(UInt32) ); + s->ftab = BZALLOC( 65537 * sizeof(UInt32) ); + + if (s->arr1 == NULL || s->arr2 == NULL || s->ftab == NULL) { + if (s->arr1 != NULL) BZFREE(s->arr1); + if (s->arr2 != NULL) BZFREE(s->arr2); + if (s->ftab != NULL) BZFREE(s->ftab); + if (s != NULL) BZFREE(s); + return BZ_MEM_ERROR; + } + + s->blockNo = 0; + s->state = BZ_S_INPUT; + s->mode = BZ_M_RUNNING; + s->combinedCRC = 0; + s->blockSize100k = blockSize100k; + s->nblockMAX = 100000 * blockSize100k - 19; + s->verbosity = verbosity; + s->workFactor = workFactor; + + s->block = (UChar*)s->arr2; + s->mtfv = (UInt16*)s->arr1; + s->zbits = NULL; + s->ptr = (UInt32*)s->arr1; + + strm->state = s; + strm->total_in_lo32 = 0; + strm->total_in_hi32 = 0; + strm->total_out_lo32 = 0; + strm->total_out_hi32 = 0; + init_RL ( s ); + prepare_new_block ( s ); + return BZ_OK; +} + + +/*---------------------------------------------------*/ +static +void add_pair_to_block ( EState* s ) +{ + Int32 i; + UChar ch = (UChar)(s->state_in_ch); + for (i = 0; i < s->state_in_len; i++) { + BZ_UPDATE_CRC( s->blockCRC, ch ); + } + s->inUse[s->state_in_ch] = True; + switch (s->state_in_len) { + case 1: + s->block[s->nblock] = (UChar)ch; s->nblock++; + break; + case 2: + s->block[s->nblock] = (UChar)ch; s->nblock++; + s->block[s->nblock] = (UChar)ch; s->nblock++; + break; + case 3: + s->block[s->nblock] = (UChar)ch; s->nblock++; + s->block[s->nblock] = (UChar)ch; s->nblock++; + s->block[s->nblock] = (UChar)ch; s->nblock++; + break; + default: + s->inUse[s->state_in_len-4] = True; + s->block[s->nblock] = (UChar)ch; s->nblock++; + s->block[s->nblock] = (UChar)ch; s->nblock++; + s->block[s->nblock] = (UChar)ch; s->nblock++; + s->block[s->nblock] = (UChar)ch; s->nblock++; + s->block[s->nblock] = ((UChar)(s->state_in_len-4)); + s->nblock++; + break; + } +} + + +/*---------------------------------------------------*/ +static +void flush_RL ( EState* s ) +{ + if (s->state_in_ch < 256) add_pair_to_block ( s ); + init_RL ( s ); +} + + +/*---------------------------------------------------*/ +#define ADD_CHAR_TO_BLOCK(zs,zchh0) \ +{ \ + UInt32 zchh = (UInt32)(zchh0); \ + /*-- fast track the common case --*/ \ + if (zchh != zs->state_in_ch && \ + zs->state_in_len == 1) { \ + UChar ch = (UChar)(zs->state_in_ch); \ + BZ_UPDATE_CRC( zs->blockCRC, ch ); \ + zs->inUse[zs->state_in_ch] = True; \ + zs->block[zs->nblock] = (UChar)ch; \ + zs->nblock++; \ + zs->state_in_ch = zchh; \ + } \ + else \ + /*-- general, uncommon cases --*/ \ + if (zchh != zs->state_in_ch || \ + zs->state_in_len == 255) { \ + if (zs->state_in_ch < 256) \ + add_pair_to_block ( zs ); \ + zs->state_in_ch = zchh; \ + zs->state_in_len = 1; \ + } else { \ + zs->state_in_len++; \ + } \ +} + + +/*---------------------------------------------------*/ +static +Bool copy_input_until_stop ( EState* s ) +{ + Bool progress_in = False; + + if (s->mode == BZ_M_RUNNING) { + + /*-- fast track the common case --*/ + while (True) { + /*-- block full? --*/ + if (s->nblock >= s->nblockMAX) break; + /*-- no input? --*/ + if (s->strm->avail_in == 0) break; + progress_in = True; + ADD_CHAR_TO_BLOCK ( s, (UInt32)(*((UChar*)(s->strm->next_in))) ); + s->strm->next_in++; + s->strm->avail_in--; + s->strm->total_in_lo32++; + if (s->strm->total_in_lo32 == 0) s->strm->total_in_hi32++; + } + + } else { + + /*-- general, uncommon case --*/ + while (True) { + /*-- block full? --*/ + if (s->nblock >= s->nblockMAX) break; + /*-- no input? --*/ + if (s->strm->avail_in == 0) break; + /*-- flush/finish end? --*/ + if (s->avail_in_expect == 0) break; + progress_in = True; + ADD_CHAR_TO_BLOCK ( s, (UInt32)(*((UChar*)(s->strm->next_in))) ); + s->strm->next_in++; + s->strm->avail_in--; + s->strm->total_in_lo32++; + if (s->strm->total_in_lo32 == 0) s->strm->total_in_hi32++; + s->avail_in_expect--; + } + } + return progress_in; +} + + +/*---------------------------------------------------*/ +static +Bool copy_output_until_stop ( EState* s ) +{ + Bool progress_out = False; + + while (True) { + + /*-- no output space? --*/ + if (s->strm->avail_out == 0) break; + + /*-- block done? --*/ + if (s->state_out_pos >= s->numZ) break; + + progress_out = True; + *(s->strm->next_out) = s->zbits[s->state_out_pos]; + s->state_out_pos++; + s->strm->avail_out--; + s->strm->next_out++; + s->strm->total_out_lo32++; + if (s->strm->total_out_lo32 == 0) s->strm->total_out_hi32++; + } + + return progress_out; +} + + +/*---------------------------------------------------*/ +static +Bool handle_compress ( bz_stream* strm ) +{ + Bool progress_in = False; + Bool progress_out = False; + EState* s = strm->state; + + while (True) { + + if (s->state == BZ_S_OUTPUT) { + progress_out |= copy_output_until_stop ( s ); + if (s->state_out_pos < s->numZ) break; + if (s->mode == BZ_M_FINISHING && + s->avail_in_expect == 0 && + isempty_RL(s)) break; + prepare_new_block ( s ); + s->state = BZ_S_INPUT; + if (s->mode == BZ_M_FLUSHING && + s->avail_in_expect == 0 && + isempty_RL(s)) break; + } + + if (s->state == BZ_S_INPUT) { + progress_in |= copy_input_until_stop ( s ); + if (s->mode != BZ_M_RUNNING && s->avail_in_expect == 0) { + flush_RL ( s ); + BZ2_compressBlock ( s, (Bool)(s->mode == BZ_M_FINISHING) ); + s->state = BZ_S_OUTPUT; + } + else + if (s->nblock >= s->nblockMAX) { + BZ2_compressBlock ( s, False ); + s->state = BZ_S_OUTPUT; + } + else + if (s->strm->avail_in == 0) { + break; + } + } + + } + + return progress_in || progress_out; +} + + +/*---------------------------------------------------*/ +int BZ_API(BZ2_bzCompress) ( bz_stream *strm, int action ) +{ + Bool progress; + EState* s; + if (strm == NULL) return BZ_PARAM_ERROR; + s = strm->state; + if (s == NULL) return BZ_PARAM_ERROR; + if (s->strm != strm) return BZ_PARAM_ERROR; + + preswitch: + switch (s->mode) { + + case BZ_M_IDLE: + return BZ_SEQUENCE_ERROR; + + case BZ_M_RUNNING: + if (action == BZ_RUN) { + progress = handle_compress ( strm ); + return progress ? BZ_RUN_OK : BZ_PARAM_ERROR; + } + else + if (action == BZ_FLUSH) { + s->avail_in_expect = strm->avail_in; + s->mode = BZ_M_FLUSHING; + goto preswitch; + } + else + if (action == BZ_FINISH) { + s->avail_in_expect = strm->avail_in; + s->mode = BZ_M_FINISHING; + goto preswitch; + } + else + return BZ_PARAM_ERROR; + + case BZ_M_FLUSHING: + if (action != BZ_FLUSH) return BZ_SEQUENCE_ERROR; + if (s->avail_in_expect != s->strm->avail_in) + return BZ_SEQUENCE_ERROR; + progress = handle_compress ( strm ); + if (s->avail_in_expect > 0 || !isempty_RL(s) || + s->state_out_pos < s->numZ) return BZ_FLUSH_OK; + s->mode = BZ_M_RUNNING; + return BZ_RUN_OK; + + case BZ_M_FINISHING: + if (action != BZ_FINISH) return BZ_SEQUENCE_ERROR; + if (s->avail_in_expect != s->strm->avail_in) + return BZ_SEQUENCE_ERROR; + progress = handle_compress ( strm ); + if (!progress) return BZ_SEQUENCE_ERROR; + if (s->avail_in_expect > 0 || !isempty_RL(s) || + s->state_out_pos < s->numZ) return BZ_FINISH_OK; + s->mode = BZ_M_IDLE; + return BZ_STREAM_END; + } + return BZ_OK; /*--not reached--*/ +} + + +/*---------------------------------------------------*/ +int BZ_API(BZ2_bzCompressEnd) ( bz_stream *strm ) +{ + EState* s; + if (strm == NULL) return BZ_PARAM_ERROR; + s = strm->state; + if (s == NULL) return BZ_PARAM_ERROR; + if (s->strm != strm) return BZ_PARAM_ERROR; + + if (s->arr1 != NULL) BZFREE(s->arr1); + if (s->arr2 != NULL) BZFREE(s->arr2); + if (s->ftab != NULL) BZFREE(s->ftab); + BZFREE(strm->state); + + strm->state = NULL; + + return BZ_OK; +} + + +/*---------------------------------------------------*/ +/*--- Decompression stuff ---*/ +/*---------------------------------------------------*/ + +/*---------------------------------------------------*/ +int BZ_API(BZ2_bzDecompressInit) + ( bz_stream* strm, + int verbosity, + int small ) +{ + DState* s; + + if (!bz_config_ok()) return BZ_CONFIG_ERROR; + + if (strm == NULL) return BZ_PARAM_ERROR; + if (small != 0 && small != 1) return BZ_PARAM_ERROR; + if (verbosity < 0 || verbosity > 4) return BZ_PARAM_ERROR; + + if (strm->bzalloc == NULL) strm->bzalloc = default_bzalloc; + if (strm->bzfree == NULL) strm->bzfree = default_bzfree; + + s = BZALLOC( sizeof(DState) ); + if (s == NULL) return BZ_MEM_ERROR; + s->strm = strm; + strm->state = s; + s->state = BZ_X_MAGIC_1; + s->bsLive = 0; + s->bsBuff = 0; + s->calculatedCombinedCRC = 0; + strm->total_in_lo32 = 0; + strm->total_in_hi32 = 0; + strm->total_out_lo32 = 0; + strm->total_out_hi32 = 0; + s->smallDecompress = (Bool)small; + s->ll4 = NULL; + s->ll16 = NULL; + s->tt = NULL; + s->currBlockNo = 0; + s->verbosity = verbosity; + + return BZ_OK; +} + + +/*---------------------------------------------------*/ +/* Return True iff data corruption is discovered. + Returns False if there is no problem. +*/ +static +Bool unRLE_obuf_to_output_FAST ( DState* s ) +{ + UChar k1; + + if (s->blockRandomised) { + + while (True) { + /* try to finish existing run */ + while (True) { + if (s->strm->avail_out == 0) return False; + if (s->state_out_len == 0) break; + *( (UChar*)(s->strm->next_out) ) = s->state_out_ch; + BZ_UPDATE_CRC ( s->calculatedBlockCRC, s->state_out_ch ); + s->state_out_len--; + s->strm->next_out++; + s->strm->avail_out--; + s->strm->total_out_lo32++; + if (s->strm->total_out_lo32 == 0) s->strm->total_out_hi32++; + } + + /* can a new run be started? */ + if (s->nblock_used == s->save_nblock+1) return False; + + /* Only caused by corrupt data stream? */ + if (s->nblock_used > s->save_nblock+1) + return True; + + s->state_out_len = 1; + s->state_out_ch = s->k0; + BZ_GET_FAST(k1); BZ_RAND_UPD_MASK; + k1 ^= BZ_RAND_MASK; s->nblock_used++; + if (s->nblock_used == s->save_nblock+1) continue; + if (k1 != s->k0) { s->k0 = k1; continue; }; + + s->state_out_len = 2; + BZ_GET_FAST(k1); BZ_RAND_UPD_MASK; + k1 ^= BZ_RAND_MASK; s->nblock_used++; + if (s->nblock_used == s->save_nblock+1) continue; + if (k1 != s->k0) { s->k0 = k1; continue; }; + + s->state_out_len = 3; + BZ_GET_FAST(k1); BZ_RAND_UPD_MASK; + k1 ^= BZ_RAND_MASK; s->nblock_used++; + if (s->nblock_used == s->save_nblock+1) continue; + if (k1 != s->k0) { s->k0 = k1; continue; }; + + BZ_GET_FAST(k1); BZ_RAND_UPD_MASK; + k1 ^= BZ_RAND_MASK; s->nblock_used++; + s->state_out_len = ((Int32)k1) + 4; + BZ_GET_FAST(s->k0); BZ_RAND_UPD_MASK; + s->k0 ^= BZ_RAND_MASK; s->nblock_used++; + } + + } else { + + /* restore */ + UInt32 c_calculatedBlockCRC = s->calculatedBlockCRC; + UChar c_state_out_ch = s->state_out_ch; + Int32 c_state_out_len = s->state_out_len; + Int32 c_nblock_used = s->nblock_used; + Int32 c_k0 = s->k0; + UInt32* c_tt = s->tt; + UInt32 c_tPos = s->tPos; + char* cs_next_out = s->strm->next_out; + unsigned int cs_avail_out = s->strm->avail_out; + Int32 ro_blockSize100k = s->blockSize100k; + /* end restore */ + + UInt32 avail_out_INIT = cs_avail_out; + Int32 s_save_nblockPP = s->save_nblock+1; + unsigned int total_out_lo32_old; + + while (True) { + + /* try to finish existing run */ + if (c_state_out_len > 0) { + while (True) { + if (cs_avail_out == 0) goto return_notr; + if (c_state_out_len == 1) break; + *( (UChar*)(cs_next_out) ) = c_state_out_ch; + BZ_UPDATE_CRC ( c_calculatedBlockCRC, c_state_out_ch ); + c_state_out_len--; + cs_next_out++; + cs_avail_out--; + } + s_state_out_len_eq_one: + { + if (cs_avail_out == 0) { + c_state_out_len = 1; goto return_notr; + }; + *( (UChar*)(cs_next_out) ) = c_state_out_ch; + BZ_UPDATE_CRC ( c_calculatedBlockCRC, c_state_out_ch ); + cs_next_out++; + cs_avail_out--; + } + } + /* Only caused by corrupt data stream? */ + if (c_nblock_used > s_save_nblockPP) + return True; + + /* can a new run be started? */ + if (c_nblock_used == s_save_nblockPP) { + c_state_out_len = 0; goto return_notr; + }; + c_state_out_ch = c_k0; + BZ_GET_FAST_C(k1); c_nblock_used++; + if (k1 != c_k0) { + c_k0 = k1; goto s_state_out_len_eq_one; + }; + if (c_nblock_used == s_save_nblockPP) + goto s_state_out_len_eq_one; + + c_state_out_len = 2; + BZ_GET_FAST_C(k1); c_nblock_used++; + if (c_nblock_used == s_save_nblockPP) continue; + if (k1 != c_k0) { c_k0 = k1; continue; }; + + c_state_out_len = 3; + BZ_GET_FAST_C(k1); c_nblock_used++; + if (c_nblock_used == s_save_nblockPP) continue; + if (k1 != c_k0) { c_k0 = k1; continue; }; + + BZ_GET_FAST_C(k1); c_nblock_used++; + c_state_out_len = ((Int32)k1) + 4; + BZ_GET_FAST_C(c_k0); c_nblock_used++; + } + + return_notr: + total_out_lo32_old = s->strm->total_out_lo32; + s->strm->total_out_lo32 += (avail_out_INIT - cs_avail_out); + if (s->strm->total_out_lo32 < total_out_lo32_old) + s->strm->total_out_hi32++; + + /* save */ + s->calculatedBlockCRC = c_calculatedBlockCRC; + s->state_out_ch = c_state_out_ch; + s->state_out_len = c_state_out_len; + s->nblock_used = c_nblock_used; + s->k0 = c_k0; + s->tt = c_tt; + s->tPos = c_tPos; + s->strm->next_out = cs_next_out; + s->strm->avail_out = cs_avail_out; + /* end save */ + } + return False; +} + + + +/*---------------------------------------------------*/ +__inline__ Int32 BZ2_indexIntoF ( Int32 indx, Int32 *cftab ) +{ + Int32 nb, na, mid; + nb = 0; + na = 256; + do { + mid = (nb + na) >> 1; + if (indx >= cftab[mid]) nb = mid; else na = mid; + } + while (na - nb != 1); + return nb; +} + + +/*---------------------------------------------------*/ +/* Return True iff data corruption is discovered. + Returns False if there is no problem. +*/ +static +Bool unRLE_obuf_to_output_SMALL ( DState* s ) +{ + UChar k1; + + if (s->blockRandomised) { + + while (True) { + /* try to finish existing run */ + while (True) { + if (s->strm->avail_out == 0) return False; + if (s->state_out_len == 0) break; + *( (UChar*)(s->strm->next_out) ) = s->state_out_ch; + BZ_UPDATE_CRC ( s->calculatedBlockCRC, s->state_out_ch ); + s->state_out_len--; + s->strm->next_out++; + s->strm->avail_out--; + s->strm->total_out_lo32++; + if (s->strm->total_out_lo32 == 0) s->strm->total_out_hi32++; + } + + /* can a new run be started? */ + if (s->nblock_used == s->save_nblock+1) return False; + + /* Only caused by corrupt data stream? */ + if (s->nblock_used > s->save_nblock+1) + return True; + + s->state_out_len = 1; + s->state_out_ch = s->k0; + BZ_GET_SMALL(k1); BZ_RAND_UPD_MASK; + k1 ^= BZ_RAND_MASK; s->nblock_used++; + if (s->nblock_used == s->save_nblock+1) continue; + if (k1 != s->k0) { s->k0 = k1; continue; }; + + s->state_out_len = 2; + BZ_GET_SMALL(k1); BZ_RAND_UPD_MASK; + k1 ^= BZ_RAND_MASK; s->nblock_used++; + if (s->nblock_used == s->save_nblock+1) continue; + if (k1 != s->k0) { s->k0 = k1; continue; }; + + s->state_out_len = 3; + BZ_GET_SMALL(k1); BZ_RAND_UPD_MASK; + k1 ^= BZ_RAND_MASK; s->nblock_used++; + if (s->nblock_used == s->save_nblock+1) continue; + if (k1 != s->k0) { s->k0 = k1; continue; }; + + BZ_GET_SMALL(k1); BZ_RAND_UPD_MASK; + k1 ^= BZ_RAND_MASK; s->nblock_used++; + s->state_out_len = ((Int32)k1) + 4; + BZ_GET_SMALL(s->k0); BZ_RAND_UPD_MASK; + s->k0 ^= BZ_RAND_MASK; s->nblock_used++; + } + + } else { + + while (True) { + /* try to finish existing run */ + while (True) { + if (s->strm->avail_out == 0) return False; + if (s->state_out_len == 0) break; + *( (UChar*)(s->strm->next_out) ) = s->state_out_ch; + BZ_UPDATE_CRC ( s->calculatedBlockCRC, s->state_out_ch ); + s->state_out_len--; + s->strm->next_out++; + s->strm->avail_out--; + s->strm->total_out_lo32++; + if (s->strm->total_out_lo32 == 0) s->strm->total_out_hi32++; + } + + /* can a new run be started? */ + if (s->nblock_used == s->save_nblock+1) return False; + + /* Only caused by corrupt data stream? */ + if (s->nblock_used > s->save_nblock+1) + return True; + + s->state_out_len = 1; + s->state_out_ch = s->k0; + BZ_GET_SMALL(k1); s->nblock_used++; + if (s->nblock_used == s->save_nblock+1) continue; + if (k1 != s->k0) { s->k0 = k1; continue; }; + + s->state_out_len = 2; + BZ_GET_SMALL(k1); s->nblock_used++; + if (s->nblock_used == s->save_nblock+1) continue; + if (k1 != s->k0) { s->k0 = k1; continue; }; + + s->state_out_len = 3; + BZ_GET_SMALL(k1); s->nblock_used++; + if (s->nblock_used == s->save_nblock+1) continue; + if (k1 != s->k0) { s->k0 = k1; continue; }; + + BZ_GET_SMALL(k1); s->nblock_used++; + s->state_out_len = ((Int32)k1) + 4; + BZ_GET_SMALL(s->k0); s->nblock_used++; + } + + } +} + + +/*---------------------------------------------------*/ +int BZ_API(BZ2_bzDecompress) ( bz_stream *strm ) +{ + Bool corrupt; + DState* s; + if (strm == NULL) return BZ_PARAM_ERROR; + s = strm->state; + if (s == NULL) return BZ_PARAM_ERROR; + if (s->strm != strm) return BZ_PARAM_ERROR; + + while (True) { + if (s->state == BZ_X_IDLE) return BZ_SEQUENCE_ERROR; + if (s->state == BZ_X_OUTPUT) { + if (s->smallDecompress) + corrupt = unRLE_obuf_to_output_SMALL ( s ); else + corrupt = unRLE_obuf_to_output_FAST ( s ); + if (corrupt) return BZ_DATA_ERROR; + if (s->nblock_used == s->save_nblock+1 && s->state_out_len == 0) { + BZ_FINALISE_CRC ( s->calculatedBlockCRC ); + if (s->verbosity >= 3) + VPrintf2 ( " {0x%08x, 0x%08x}", s->storedBlockCRC, + s->calculatedBlockCRC ); + if (s->verbosity >= 2) VPrintf0 ( "]" ); + if (s->calculatedBlockCRC != s->storedBlockCRC) + return BZ_DATA_ERROR; + s->calculatedCombinedCRC + = (s->calculatedCombinedCRC << 1) | + (s->calculatedCombinedCRC >> 31); + s->calculatedCombinedCRC ^= s->calculatedBlockCRC; + s->state = BZ_X_BLKHDR_1; + } else { + return BZ_OK; + } + } + if (s->state >= BZ_X_MAGIC_1) { + Int32 r = BZ2_decompress ( s ); + if (r == BZ_STREAM_END) { + if (s->verbosity >= 3) + VPrintf2 ( "\n combined CRCs: stored = 0x%08x, computed = 0x%08x", + s->storedCombinedCRC, s->calculatedCombinedCRC ); + if (s->calculatedCombinedCRC != s->storedCombinedCRC) + return BZ_DATA_ERROR; + return r; + } + if (s->state != BZ_X_OUTPUT) return r; + } + } + + AssertH ( 0, 6001 ); + + return 0; /*NOTREACHED*/ +} + + +/*---------------------------------------------------*/ +int BZ_API(BZ2_bzDecompressEnd) ( bz_stream *strm ) +{ + DState* s; + if (strm == NULL) return BZ_PARAM_ERROR; + s = strm->state; + if (s == NULL) return BZ_PARAM_ERROR; + if (s->strm != strm) return BZ_PARAM_ERROR; + + if (s->tt != NULL) BZFREE(s->tt); + if (s->ll16 != NULL) BZFREE(s->ll16); + if (s->ll4 != NULL) BZFREE(s->ll4); + + BZFREE(strm->state); + strm->state = NULL; + + return BZ_OK; +} + + +#ifndef BZ_NO_STDIO +/*---------------------------------------------------*/ +/*--- File I/O stuff ---*/ +/*---------------------------------------------------*/ + +#define BZ_SETERR(eee) \ +{ \ + if (bzerror != NULL) *bzerror = eee; \ + if (bzf != NULL) bzf->lastErr = eee; \ +} + +typedef + struct { + FILE* handle; + Char buf[BZ_MAX_UNUSED]; + Int32 bufN; + Bool writing; + bz_stream strm; + Int32 lastErr; + Bool initialisedOk; + } + bzFile; + + +/*---------------------------------------------*/ +static Bool myfeof ( FILE* f ) +{ + Int32 c = fgetc ( f ); + if (c == EOF) return True; + ungetc ( c, f ); + return False; +} + + +/*---------------------------------------------------*/ +BZFILE* BZ_API(BZ2_bzWriteOpen) + ( int* bzerror, + FILE* f, + int blockSize100k, + int verbosity, + int workFactor ) +{ + Int32 ret; + bzFile* bzf = NULL; + + BZ_SETERR(BZ_OK); + + if (f == NULL || + (blockSize100k < 1 || blockSize100k > 9) || + (workFactor < 0 || workFactor > 250) || + (verbosity < 0 || verbosity > 4)) + { BZ_SETERR(BZ_PARAM_ERROR); return NULL; }; + + if (ferror(f)) + { BZ_SETERR(BZ_IO_ERROR); return NULL; }; + + bzf = malloc ( sizeof(bzFile) ); + if (bzf == NULL) + { BZ_SETERR(BZ_MEM_ERROR); return NULL; }; + + BZ_SETERR(BZ_OK); + bzf->initialisedOk = False; + bzf->bufN = 0; + bzf->handle = f; + bzf->writing = True; + bzf->strm.bzalloc = NULL; + bzf->strm.bzfree = NULL; + bzf->strm.opaque = NULL; + + if (workFactor == 0) workFactor = 30; + ret = BZ2_bzCompressInit ( &(bzf->strm), blockSize100k, + verbosity, workFactor ); + if (ret != BZ_OK) + { BZ_SETERR(ret); free(bzf); return NULL; }; + + bzf->strm.avail_in = 0; + bzf->initialisedOk = True; + return bzf; +} + + + +/*---------------------------------------------------*/ +void BZ_API(BZ2_bzWrite) + ( int* bzerror, + BZFILE* b, + void* buf, + int len ) +{ + Int32 n, n2, ret; + bzFile* bzf = (bzFile*)b; + + BZ_SETERR(BZ_OK); + if (bzf == NULL || buf == NULL || len < 0) + { BZ_SETERR(BZ_PARAM_ERROR); return; }; + if (!(bzf->writing)) + { BZ_SETERR(BZ_SEQUENCE_ERROR); return; }; + if (ferror(bzf->handle)) + { BZ_SETERR(BZ_IO_ERROR); return; }; + + if (len == 0) + { BZ_SETERR(BZ_OK); return; }; + + bzf->strm.avail_in = len; + bzf->strm.next_in = buf; + + while (True) { + bzf->strm.avail_out = BZ_MAX_UNUSED; + bzf->strm.next_out = bzf->buf; + ret = BZ2_bzCompress ( &(bzf->strm), BZ_RUN ); + if (ret != BZ_RUN_OK) + { BZ_SETERR(ret); return; }; + + if (bzf->strm.avail_out < BZ_MAX_UNUSED) { + n = BZ_MAX_UNUSED - bzf->strm.avail_out; + n2 = fwrite ( (void*)(bzf->buf), sizeof(UChar), + n, bzf->handle ); + if (n != n2 || ferror(bzf->handle)) + { BZ_SETERR(BZ_IO_ERROR); return; }; + } + + if (bzf->strm.avail_in == 0) + { BZ_SETERR(BZ_OK); return; }; + } +} + + +/*---------------------------------------------------*/ +void BZ_API(BZ2_bzWriteClose) + ( int* bzerror, + BZFILE* b, + int abandon, + unsigned int* nbytes_in, + unsigned int* nbytes_out ) +{ + BZ2_bzWriteClose64 ( bzerror, b, abandon, + nbytes_in, NULL, nbytes_out, NULL ); +} + + +void BZ_API(BZ2_bzWriteClose64) + ( int* bzerror, + BZFILE* b, + int abandon, + unsigned int* nbytes_in_lo32, + unsigned int* nbytes_in_hi32, + unsigned int* nbytes_out_lo32, + unsigned int* nbytes_out_hi32 ) +{ + Int32 n, n2, ret; + bzFile* bzf = (bzFile*)b; + + if (bzf == NULL) + { BZ_SETERR(BZ_OK); return; }; + if (!(bzf->writing)) + { BZ_SETERR(BZ_SEQUENCE_ERROR); return; }; + if (ferror(bzf->handle)) + { BZ_SETERR(BZ_IO_ERROR); return; }; + + if (nbytes_in_lo32 != NULL) *nbytes_in_lo32 = 0; + if (nbytes_in_hi32 != NULL) *nbytes_in_hi32 = 0; + if (nbytes_out_lo32 != NULL) *nbytes_out_lo32 = 0; + if (nbytes_out_hi32 != NULL) *nbytes_out_hi32 = 0; + + if ((!abandon) && bzf->lastErr == BZ_OK) { + while (True) { + bzf->strm.avail_out = BZ_MAX_UNUSED; + bzf->strm.next_out = bzf->buf; + ret = BZ2_bzCompress ( &(bzf->strm), BZ_FINISH ); + if (ret != BZ_FINISH_OK && ret != BZ_STREAM_END) + { BZ_SETERR(ret); return; }; + + if (bzf->strm.avail_out < BZ_MAX_UNUSED) { + n = BZ_MAX_UNUSED - bzf->strm.avail_out; + n2 = fwrite ( (void*)(bzf->buf), sizeof(UChar), + n, bzf->handle ); + if (n != n2 || ferror(bzf->handle)) + { BZ_SETERR(BZ_IO_ERROR); return; }; + } + + if (ret == BZ_STREAM_END) break; + } + } + + if ( !abandon && !ferror ( bzf->handle ) ) { + fflush ( bzf->handle ); + if (ferror(bzf->handle)) + { BZ_SETERR(BZ_IO_ERROR); return; }; + } + + if (nbytes_in_lo32 != NULL) + *nbytes_in_lo32 = bzf->strm.total_in_lo32; + if (nbytes_in_hi32 != NULL) + *nbytes_in_hi32 = bzf->strm.total_in_hi32; + if (nbytes_out_lo32 != NULL) + *nbytes_out_lo32 = bzf->strm.total_out_lo32; + if (nbytes_out_hi32 != NULL) + *nbytes_out_hi32 = bzf->strm.total_out_hi32; + + BZ_SETERR(BZ_OK); + BZ2_bzCompressEnd ( &(bzf->strm) ); + free ( bzf ); +} + + +/*---------------------------------------------------*/ +BZFILE* BZ_API(BZ2_bzReadOpen) + ( int* bzerror, + FILE* f, + int verbosity, + int small, + void* unused, + int nUnused ) +{ + bzFile* bzf = NULL; + int ret; + + BZ_SETERR(BZ_OK); + + if (f == NULL || + (small != 0 && small != 1) || + (verbosity < 0 || verbosity > 4) || + (unused == NULL && nUnused != 0) || + (unused != NULL && (nUnused < 0 || nUnused > BZ_MAX_UNUSED))) + { BZ_SETERR(BZ_PARAM_ERROR); return NULL; }; + + if (ferror(f)) + { BZ_SETERR(BZ_IO_ERROR); return NULL; }; + + bzf = malloc ( sizeof(bzFile) ); + if (bzf == NULL) + { BZ_SETERR(BZ_MEM_ERROR); return NULL; }; + + BZ_SETERR(BZ_OK); + + bzf->initialisedOk = False; + bzf->handle = f; + bzf->bufN = 0; + bzf->writing = False; + bzf->strm.bzalloc = NULL; + bzf->strm.bzfree = NULL; + bzf->strm.opaque = NULL; + + while (nUnused > 0) { + bzf->buf[bzf->bufN] = *((UChar*)(unused)); bzf->bufN++; + unused = ((void*)( 1 + ((UChar*)(unused)) )); + nUnused--; + } + + ret = BZ2_bzDecompressInit ( &(bzf->strm), verbosity, small ); + if (ret != BZ_OK) + { BZ_SETERR(ret); free(bzf); return NULL; }; + + bzf->strm.avail_in = bzf->bufN; + bzf->strm.next_in = bzf->buf; + + bzf->initialisedOk = True; + return bzf; +} + + +/*---------------------------------------------------*/ +void BZ_API(BZ2_bzReadClose) ( int *bzerror, BZFILE *b ) +{ + bzFile* bzf = (bzFile*)b; + + BZ_SETERR(BZ_OK); + if (bzf == NULL) + { BZ_SETERR(BZ_OK); return; }; + + if (bzf->writing) + { BZ_SETERR(BZ_SEQUENCE_ERROR); return; }; + + if (bzf->initialisedOk) + (void)BZ2_bzDecompressEnd ( &(bzf->strm) ); + free ( bzf ); +} + + +/*---------------------------------------------------*/ +int BZ_API(BZ2_bzRead) + ( int* bzerror, + BZFILE* b, + void* buf, + int len ) +{ + Int32 n, ret; + bzFile* bzf = (bzFile*)b; + + BZ_SETERR(BZ_OK); + + if (bzf == NULL || buf == NULL || len < 0) + { BZ_SETERR(BZ_PARAM_ERROR); return 0; }; + + if (bzf->writing) + { BZ_SETERR(BZ_SEQUENCE_ERROR); return 0; }; + + if (len == 0) + { BZ_SETERR(BZ_OK); return 0; }; + + bzf->strm.avail_out = len; + bzf->strm.next_out = buf; + + while (True) { + + if (ferror(bzf->handle)) + { BZ_SETERR(BZ_IO_ERROR); return 0; }; + + if (bzf->strm.avail_in == 0 && !myfeof(bzf->handle)) { + n = fread ( bzf->buf, sizeof(UChar), + BZ_MAX_UNUSED, bzf->handle ); + if (ferror(bzf->handle)) + { BZ_SETERR(BZ_IO_ERROR); return 0; }; + bzf->bufN = n; + bzf->strm.avail_in = bzf->bufN; + bzf->strm.next_in = bzf->buf; + } + + ret = BZ2_bzDecompress ( &(bzf->strm) ); + + if (ret != BZ_OK && ret != BZ_STREAM_END) + { BZ_SETERR(ret); return 0; }; + + if (ret == BZ_OK && myfeof(bzf->handle) && + bzf->strm.avail_in == 0 && bzf->strm.avail_out > 0) + { BZ_SETERR(BZ_UNEXPECTED_EOF); return 0; }; + + if (ret == BZ_STREAM_END) + { BZ_SETERR(BZ_STREAM_END); + return len - bzf->strm.avail_out; }; + if (bzf->strm.avail_out == 0) + { BZ_SETERR(BZ_OK); return len; }; + + } + + return 0; /*not reached*/ +} + + +/*---------------------------------------------------*/ +void BZ_API(BZ2_bzReadGetUnused) + ( int* bzerror, + BZFILE* b, + void** unused, + int* nUnused ) +{ + bzFile* bzf = (bzFile*)b; + if (bzf == NULL) + { BZ_SETERR(BZ_PARAM_ERROR); return; }; + if (bzf->lastErr != BZ_STREAM_END) + { BZ_SETERR(BZ_SEQUENCE_ERROR); return; }; + if (unused == NULL || nUnused == NULL) + { BZ_SETERR(BZ_PARAM_ERROR); return; }; + + BZ_SETERR(BZ_OK); + *nUnused = bzf->strm.avail_in; + *unused = bzf->strm.next_in; +} +#endif + + +/*---------------------------------------------------*/ +/*--- Misc convenience stuff ---*/ +/*---------------------------------------------------*/ + +/*---------------------------------------------------*/ +int BZ_API(BZ2_bzBuffToBuffCompress) + ( char* dest, + unsigned int* destLen, + char* source, + unsigned int sourceLen, + int blockSize100k, + int verbosity, + int workFactor ) +{ + bz_stream strm; + int ret; + + if (dest == NULL || destLen == NULL || + source == NULL || + blockSize100k < 1 || blockSize100k > 9 || + verbosity < 0 || verbosity > 4 || + workFactor < 0 || workFactor > 250) + return BZ_PARAM_ERROR; + + if (workFactor == 0) workFactor = 30; + strm.bzalloc = NULL; + strm.bzfree = NULL; + strm.opaque = NULL; + ret = BZ2_bzCompressInit ( &strm, blockSize100k, + verbosity, workFactor ); + if (ret != BZ_OK) return ret; + + strm.next_in = source; + strm.next_out = dest; + strm.avail_in = sourceLen; + strm.avail_out = *destLen; + + ret = BZ2_bzCompress ( &strm, BZ_FINISH ); + if (ret == BZ_FINISH_OK) goto output_overflow; + if (ret != BZ_STREAM_END) goto errhandler; + + /* normal termination */ + *destLen -= strm.avail_out; + BZ2_bzCompressEnd ( &strm ); + return BZ_OK; + + output_overflow: + BZ2_bzCompressEnd ( &strm ); + return BZ_OUTBUFF_FULL; + + errhandler: + BZ2_bzCompressEnd ( &strm ); + return ret; +} + + +/*---------------------------------------------------*/ +int BZ_API(BZ2_bzBuffToBuffDecompress) + ( char* dest, + unsigned int* destLen, + char* source, + unsigned int sourceLen, + int small, + int verbosity ) +{ + bz_stream strm; + int ret; + + if (dest == NULL || destLen == NULL || + source == NULL || + (small != 0 && small != 1) || + verbosity < 0 || verbosity > 4) + return BZ_PARAM_ERROR; + + strm.bzalloc = NULL; + strm.bzfree = NULL; + strm.opaque = NULL; + ret = BZ2_bzDecompressInit ( &strm, verbosity, small ); + if (ret != BZ_OK) return ret; + + strm.next_in = source; + strm.next_out = dest; + strm.avail_in = sourceLen; + strm.avail_out = *destLen; + + ret = BZ2_bzDecompress ( &strm ); + if (ret == BZ_OK) goto output_overflow_or_eof; + if (ret != BZ_STREAM_END) goto errhandler; + + /* normal termination */ + *destLen -= strm.avail_out; + BZ2_bzDecompressEnd ( &strm ); + return BZ_OK; + + output_overflow_or_eof: + if (strm.avail_out > 0) { + BZ2_bzDecompressEnd ( &strm ); + return BZ_UNEXPECTED_EOF; + } else { + BZ2_bzDecompressEnd ( &strm ); + return BZ_OUTBUFF_FULL; + }; + + errhandler: + BZ2_bzDecompressEnd ( &strm ); + return ret; +} + + +/*---------------------------------------------------*/ +/*-- + Code contributed by Yoshioka Tsuneo (tsuneo@rr.iij4u.or.jp) + to support better zlib compatibility. + This code is not _officially_ part of libbzip2 (yet); + I haven't tested it, documented it, or considered the + threading-safeness of it. + If this code breaks, please contact both Yoshioka and me. +--*/ +/*---------------------------------------------------*/ + +/*---------------------------------------------------*/ +/*-- + return version like "0.9.5d, 4-Sept-1999". +--*/ +const char * BZ_API(BZ2_bzlibVersion)(void) +{ + return BZ_VERSION; +} + + +#ifndef BZ_NO_STDIO +/*---------------------------------------------------*/ + +#if defined(_WIN32) || defined(OS2) || defined(MSDOS) +# include +# include +# define SET_BINARY_MODE(file) setmode(fileno(file),O_BINARY) +#else +# define SET_BINARY_MODE(file) +#endif +static +BZFILE * bzopen_or_bzdopen + ( const char *path, /* no use when bzdopen */ + int fd, /* no use when bzdopen */ + const char *mode, + int open_mode) /* bzopen: 0, bzdopen:1 */ +{ + int bzerr; + char unused[BZ_MAX_UNUSED]; + int blockSize100k = 9; + int writing = 0; + char mode2[10] = ""; + FILE *fp = NULL; + BZFILE *bzfp = NULL; + int verbosity = 0; + int workFactor = 30; + int smallMode = 0; + int nUnused = 0; + + if (mode == NULL) return NULL; + while (*mode) { + switch (*mode) { + case 'r': + writing = 0; break; + case 'w': + writing = 1; break; + case 's': + smallMode = 1; break; + default: + if (isdigit((int)(*mode))) { + blockSize100k = *mode-BZ_HDR_0; + } + } + mode++; + } + strcat(mode2, writing ? "w" : "r" ); + strcat(mode2,"b"); /* binary mode */ + + if (open_mode==0) { + if (path==NULL || strcmp(path,"")==0) { + fp = (writing ? stdout : stdin); + SET_BINARY_MODE(fp); + } else { + fp = fopen(path,mode2); + } + } else { +#ifdef BZ_STRICT_ANSI + fp = NULL; +#else + fp = fdopen(fd,mode2); +#endif + } + if (fp == NULL) return NULL; + + if (writing) { + /* Guard against total chaos and anarchy -- JRS */ + if (blockSize100k < 1) blockSize100k = 1; + if (blockSize100k > 9) blockSize100k = 9; + bzfp = BZ2_bzWriteOpen(&bzerr,fp,blockSize100k, + verbosity,workFactor); + } else { + bzfp = BZ2_bzReadOpen(&bzerr,fp,verbosity,smallMode, + unused,nUnused); + } + if (bzfp == NULL) { + if (fp != stdin && fp != stdout) fclose(fp); + return NULL; + } + return bzfp; +} + + +/*---------------------------------------------------*/ +/*-- + open file for read or write. + ex) bzopen("file","w9") + case path="" or NULL => use stdin or stdout. +--*/ +BZFILE * BZ_API(BZ2_bzopen) + ( const char *path, + const char *mode ) +{ + return bzopen_or_bzdopen(path,-1,mode,/*bzopen*/0); +} + + +/*---------------------------------------------------*/ +BZFILE * BZ_API(BZ2_bzdopen) + ( int fd, + const char *mode ) +{ + return bzopen_or_bzdopen(NULL,fd,mode,/*bzdopen*/1); +} + + +/*---------------------------------------------------*/ +int BZ_API(BZ2_bzread) (BZFILE* b, void* buf, int len ) +{ + int bzerr, nread; + if (((bzFile*)b)->lastErr == BZ_STREAM_END) return 0; + nread = BZ2_bzRead(&bzerr,b,buf,len); + if (bzerr == BZ_OK || bzerr == BZ_STREAM_END) { + return nread; + } else { + return -1; + } +} + + +/*---------------------------------------------------*/ +int BZ_API(BZ2_bzwrite) (BZFILE* b, void* buf, int len ) +{ + int bzerr; + + BZ2_bzWrite(&bzerr,b,buf,len); + if(bzerr == BZ_OK){ + return len; + }else{ + return -1; + } +} + + +/*---------------------------------------------------*/ +int BZ_API(BZ2_bzflush) (BZFILE *b) +{ + /* do nothing now... */ + return 0; +} + + +/*---------------------------------------------------*/ +void BZ_API(BZ2_bzclose) (BZFILE* b) +{ + int bzerr; + FILE *fp; + + if (b==NULL) {return;} + fp = ((bzFile *)b)->handle; + if(((bzFile*)b)->writing){ + BZ2_bzWriteClose(&bzerr,b,0,NULL,NULL); + if(bzerr != BZ_OK){ + BZ2_bzWriteClose(NULL,b,1,NULL,NULL); + } + }else{ + BZ2_bzReadClose(&bzerr,b); + } + if(fp!=stdin && fp!=stdout){ + fclose(fp); + } +} + + +/*---------------------------------------------------*/ +/*-- + return last error code +--*/ +static const char *bzerrorstrings[] = { + "OK" + ,"SEQUENCE_ERROR" + ,"PARAM_ERROR" + ,"MEM_ERROR" + ,"DATA_ERROR" + ,"DATA_ERROR_MAGIC" + ,"IO_ERROR" + ,"UNEXPECTED_EOF" + ,"OUTBUFF_FULL" + ,"CONFIG_ERROR" + ,"???" /* for future */ + ,"???" /* for future */ + ,"???" /* for future */ + ,"???" /* for future */ + ,"???" /* for future */ + ,"???" /* for future */ +}; + + +const char * BZ_API(BZ2_bzerror) (BZFILE *b, int *errnum) +{ + int err = ((bzFile *)b)->lastErr; + + if(err>0) err = 0; + *errnum = err; + return bzerrorstrings[err*-1]; +} +#endif + + +/*-------------------------------------------------------------*/ +/*--- end bzlib.c ---*/ +/*-------------------------------------------------------------*/ diff --git a/Sources/CBZ2/src/bzlib_private.h b/Sources/CBZ2/src/bzlib_private.h new file mode 100644 index 0000000..3755a6f --- /dev/null +++ b/Sources/CBZ2/src/bzlib_private.h @@ -0,0 +1,509 @@ + +/*-------------------------------------------------------------*/ +/*--- Private header file for the library. ---*/ +/*--- bzlib_private.h ---*/ +/*-------------------------------------------------------------*/ + +/* ------------------------------------------------------------------ + This file is part of bzip2/libbzip2, a program and library for + lossless, block-sorting data compression. + + bzip2/libbzip2 version 1.0.8 of 13 July 2019 + Copyright (C) 1996-2019 Julian Seward + + Please read the WARNING, DISCLAIMER and PATENTS sections in the + README file. + + This program is released under the terms of the license contained + in the file LICENSE. + ------------------------------------------------------------------ */ + + +#ifndef _BZLIB_PRIVATE_H +#define _BZLIB_PRIVATE_H + +#include + +#ifndef BZ_NO_STDIO +#include +#include +#include +#endif + +#include "bzlib.h" + + + +/*-- General stuff. --*/ + +#define BZ_VERSION "1.0.8, 13-Jul-2019" + +typedef char Char; +typedef unsigned char Bool; +typedef unsigned char UChar; +typedef int Int32; +typedef unsigned int UInt32; +typedef short Int16; +typedef unsigned short UInt16; + +#define True ((Bool)1) +#define False ((Bool)0) + +#ifndef __GNUC__ +#define __inline__ /* */ +#endif + +#ifndef BZ_NO_STDIO + +extern void BZ2_bz__AssertH__fail ( int errcode ); +#define AssertH(cond,errcode) \ + { if (!(cond)) BZ2_bz__AssertH__fail ( errcode ); } + +#if BZ_DEBUG +#define AssertD(cond,msg) \ + { if (!(cond)) { \ + fprintf ( stderr, \ + "\n\nlibbzip2(debug build): internal error\n\t%s\n", msg );\ + exit(1); \ + }} +#else +#define AssertD(cond,msg) /* */ +#endif + +#define VPrintf0(zf) \ + fprintf(stderr,zf) +#define VPrintf1(zf,za1) \ + fprintf(stderr,zf,za1) +#define VPrintf2(zf,za1,za2) \ + fprintf(stderr,zf,za1,za2) +#define VPrintf3(zf,za1,za2,za3) \ + fprintf(stderr,zf,za1,za2,za3) +#define VPrintf4(zf,za1,za2,za3,za4) \ + fprintf(stderr,zf,za1,za2,za3,za4) +#define VPrintf5(zf,za1,za2,za3,za4,za5) \ + fprintf(stderr,zf,za1,za2,za3,za4,za5) + +#else + +extern void bz_internal_error ( int errcode ); +#define AssertH(cond,errcode) \ + { if (!(cond)) bz_internal_error ( errcode ); } +#define AssertD(cond,msg) do { } while (0) +#define VPrintf0(zf) do { } while (0) +#define VPrintf1(zf,za1) do { } while (0) +#define VPrintf2(zf,za1,za2) do { } while (0) +#define VPrintf3(zf,za1,za2,za3) do { } while (0) +#define VPrintf4(zf,za1,za2,za3,za4) do { } while (0) +#define VPrintf5(zf,za1,za2,za3,za4,za5) do { } while (0) + +#endif + + +#define BZALLOC(nnn) (strm->bzalloc)(strm->opaque,(nnn),1) +#define BZFREE(ppp) (strm->bzfree)(strm->opaque,(ppp)) + + +/*-- Header bytes. --*/ + +#define BZ_HDR_B 0x42 /* 'B' */ +#define BZ_HDR_Z 0x5a /* 'Z' */ +#define BZ_HDR_h 0x68 /* 'h' */ +#define BZ_HDR_0 0x30 /* '0' */ + +/*-- Constants for the back end. --*/ + +#define BZ_MAX_ALPHA_SIZE 258 +#define BZ_MAX_CODE_LEN 23 + +#define BZ_RUNA 0 +#define BZ_RUNB 1 + +#define BZ_N_GROUPS 6 +#define BZ_G_SIZE 50 +#define BZ_N_ITERS 4 + +#define BZ_MAX_SELECTORS (2 + (900000 / BZ_G_SIZE)) + + + +/*-- Stuff for randomising repetitive blocks. --*/ + +extern Int32 BZ2_rNums[512]; + +#define BZ_RAND_DECLS \ + Int32 rNToGo; \ + Int32 rTPos \ + +#define BZ_RAND_INIT_MASK \ + s->rNToGo = 0; \ + s->rTPos = 0 \ + +#define BZ_RAND_MASK ((s->rNToGo == 1) ? 1 : 0) + +#define BZ_RAND_UPD_MASK \ + if (s->rNToGo == 0) { \ + s->rNToGo = BZ2_rNums[s->rTPos]; \ + s->rTPos++; \ + if (s->rTPos == 512) s->rTPos = 0; \ + } \ + s->rNToGo--; + + + +/*-- Stuff for doing CRCs. --*/ + +extern UInt32 BZ2_crc32Table[256]; + +#define BZ_INITIALISE_CRC(crcVar) \ +{ \ + crcVar = 0xffffffffL; \ +} + +#define BZ_FINALISE_CRC(crcVar) \ +{ \ + crcVar = ~(crcVar); \ +} + +#define BZ_UPDATE_CRC(crcVar,cha) \ +{ \ + crcVar = (crcVar << 8) ^ \ + BZ2_crc32Table[(crcVar >> 24) ^ \ + ((UChar)cha)]; \ +} + + + +/*-- States and modes for compression. --*/ + +#define BZ_M_IDLE 1 +#define BZ_M_RUNNING 2 +#define BZ_M_FLUSHING 3 +#define BZ_M_FINISHING 4 + +#define BZ_S_OUTPUT 1 +#define BZ_S_INPUT 2 + +#define BZ_N_RADIX 2 +#define BZ_N_QSORT 12 +#define BZ_N_SHELL 18 +#define BZ_N_OVERSHOOT (BZ_N_RADIX + BZ_N_QSORT + BZ_N_SHELL + 2) + + + + +/*-- Structure holding all the compression-side stuff. --*/ + +typedef + struct { + /* pointer back to the struct bz_stream */ + bz_stream* strm; + + /* mode this stream is in, and whether inputting */ + /* or outputting data */ + Int32 mode; + Int32 state; + + /* remembers avail_in when flush/finish requested */ + UInt32 avail_in_expect; + + /* for doing the block sorting */ + UInt32* arr1; + UInt32* arr2; + UInt32* ftab; + Int32 origPtr; + + /* aliases for arr1 and arr2 */ + UInt32* ptr; + UChar* block; + UInt16* mtfv; + UChar* zbits; + + /* for deciding when to use the fallback sorting algorithm */ + Int32 workFactor; + + /* run-length-encoding of the input */ + UInt32 state_in_ch; + Int32 state_in_len; + BZ_RAND_DECLS; + + /* input and output limits and current posns */ + Int32 nblock; + Int32 nblockMAX; + Int32 numZ; + Int32 state_out_pos; + + /* map of bytes used in block */ + Int32 nInUse; + Bool inUse[256]; + UChar unseqToSeq[256]; + + /* the buffer for bit stream creation */ + UInt32 bsBuff; + Int32 bsLive; + + /* block and combined CRCs */ + UInt32 blockCRC; + UInt32 combinedCRC; + + /* misc administratium */ + Int32 verbosity; + Int32 blockNo; + Int32 blockSize100k; + + /* stuff for coding the MTF values */ + Int32 nMTF; + Int32 mtfFreq [BZ_MAX_ALPHA_SIZE]; + UChar selector [BZ_MAX_SELECTORS]; + UChar selectorMtf[BZ_MAX_SELECTORS]; + + UChar len [BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE]; + Int32 code [BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE]; + Int32 rfreq [BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE]; + /* second dimension: only 3 needed; 4 makes index calculations faster */ + UInt32 len_pack[BZ_MAX_ALPHA_SIZE][4]; + + } + EState; + + + +/*-- externs for compression. --*/ + +extern void +BZ2_blockSort ( EState* ); + +extern void +BZ2_compressBlock ( EState*, Bool ); + +extern void +BZ2_bsInitWrite ( EState* ); + +extern void +BZ2_hbAssignCodes ( Int32*, UChar*, Int32, Int32, Int32 ); + +extern void +BZ2_hbMakeCodeLengths ( UChar*, Int32*, Int32, Int32 ); + + + +/*-- states for decompression. --*/ + +#define BZ_X_IDLE 1 +#define BZ_X_OUTPUT 2 + +#define BZ_X_MAGIC_1 10 +#define BZ_X_MAGIC_2 11 +#define BZ_X_MAGIC_3 12 +#define BZ_X_MAGIC_4 13 +#define BZ_X_BLKHDR_1 14 +#define BZ_X_BLKHDR_2 15 +#define BZ_X_BLKHDR_3 16 +#define BZ_X_BLKHDR_4 17 +#define BZ_X_BLKHDR_5 18 +#define BZ_X_BLKHDR_6 19 +#define BZ_X_BCRC_1 20 +#define BZ_X_BCRC_2 21 +#define BZ_X_BCRC_3 22 +#define BZ_X_BCRC_4 23 +#define BZ_X_RANDBIT 24 +#define BZ_X_ORIGPTR_1 25 +#define BZ_X_ORIGPTR_2 26 +#define BZ_X_ORIGPTR_3 27 +#define BZ_X_MAPPING_1 28 +#define BZ_X_MAPPING_2 29 +#define BZ_X_SELECTOR_1 30 +#define BZ_X_SELECTOR_2 31 +#define BZ_X_SELECTOR_3 32 +#define BZ_X_CODING_1 33 +#define BZ_X_CODING_2 34 +#define BZ_X_CODING_3 35 +#define BZ_X_MTF_1 36 +#define BZ_X_MTF_2 37 +#define BZ_X_MTF_3 38 +#define BZ_X_MTF_4 39 +#define BZ_X_MTF_5 40 +#define BZ_X_MTF_6 41 +#define BZ_X_ENDHDR_2 42 +#define BZ_X_ENDHDR_3 43 +#define BZ_X_ENDHDR_4 44 +#define BZ_X_ENDHDR_5 45 +#define BZ_X_ENDHDR_6 46 +#define BZ_X_CCRC_1 47 +#define BZ_X_CCRC_2 48 +#define BZ_X_CCRC_3 49 +#define BZ_X_CCRC_4 50 + + + +/*-- Constants for the fast MTF decoder. --*/ + +#define MTFA_SIZE 4096 +#define MTFL_SIZE 16 + + + +/*-- Structure holding all the decompression-side stuff. --*/ + +typedef + struct { + /* pointer back to the struct bz_stream */ + bz_stream* strm; + + /* state indicator for this stream */ + Int32 state; + + /* for doing the final run-length decoding */ + UChar state_out_ch; + Int32 state_out_len; + Bool blockRandomised; + BZ_RAND_DECLS; + + /* the buffer for bit stream reading */ + UInt32 bsBuff; + Int32 bsLive; + + /* misc administratium */ + Int32 blockSize100k; + Bool smallDecompress; + Int32 currBlockNo; + Int32 verbosity; + + /* for undoing the Burrows-Wheeler transform */ + Int32 origPtr; + UInt32 tPos; + Int32 k0; + Int32 unzftab[256]; + Int32 nblock_used; + Int32 cftab[257]; + Int32 cftabCopy[257]; + + /* for undoing the Burrows-Wheeler transform (FAST) */ + UInt32 *tt; + + /* for undoing the Burrows-Wheeler transform (SMALL) */ + UInt16 *ll16; + UChar *ll4; + + /* stored and calculated CRCs */ + UInt32 storedBlockCRC; + UInt32 storedCombinedCRC; + UInt32 calculatedBlockCRC; + UInt32 calculatedCombinedCRC; + + /* map of bytes used in block */ + Int32 nInUse; + Bool inUse[256]; + Bool inUse16[16]; + UChar seqToUnseq[256]; + + /* for decoding the MTF values */ + UChar mtfa [MTFA_SIZE]; + Int32 mtfbase[256 / MTFL_SIZE]; + UChar selector [BZ_MAX_SELECTORS]; + UChar selectorMtf[BZ_MAX_SELECTORS]; + UChar len [BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE]; + + Int32 limit [BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE]; + Int32 base [BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE]; + Int32 perm [BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE]; + Int32 minLens[BZ_N_GROUPS]; + + /* save area for scalars in the main decompress code */ + Int32 save_i; + Int32 save_j; + Int32 save_t; + Int32 save_alphaSize; + Int32 save_nGroups; + Int32 save_nSelectors; + Int32 save_EOB; + Int32 save_groupNo; + Int32 save_groupPos; + Int32 save_nextSym; + Int32 save_nblockMAX; + Int32 save_nblock; + Int32 save_es; + Int32 save_N; + Int32 save_curr; + Int32 save_zt; + Int32 save_zn; + Int32 save_zvec; + Int32 save_zj; + Int32 save_gSel; + Int32 save_gMinlen; + Int32* save_gLimit; + Int32* save_gBase; + Int32* save_gPerm; + + } + DState; + + + +/*-- Macros for decompression. --*/ + +#define BZ_GET_FAST(cccc) \ + /* c_tPos is unsigned, hence test < 0 is pointless. */ \ + if (s->tPos >= (UInt32)100000 * (UInt32)s->blockSize100k) return True; \ + s->tPos = s->tt[s->tPos]; \ + cccc = (UChar)(s->tPos & 0xff); \ + s->tPos >>= 8; + +#define BZ_GET_FAST_C(cccc) \ + /* c_tPos is unsigned, hence test < 0 is pointless. */ \ + if (c_tPos >= (UInt32)100000 * (UInt32)ro_blockSize100k) return True; \ + c_tPos = c_tt[c_tPos]; \ + cccc = (UChar)(c_tPos & 0xff); \ + c_tPos >>= 8; + +#define SET_LL4(i,n) \ + { if (((i) & 0x1) == 0) \ + s->ll4[(i) >> 1] = (s->ll4[(i) >> 1] & 0xf0) | (n); else \ + s->ll4[(i) >> 1] = (s->ll4[(i) >> 1] & 0x0f) | ((n) << 4); \ + } + +#define GET_LL4(i) \ + ((((UInt32)(s->ll4[(i) >> 1])) >> (((i) << 2) & 0x4)) & 0xF) + +#define SET_LL(i,n) \ + { s->ll16[i] = (UInt16)(n & 0x0000ffff); \ + SET_LL4(i, n >> 16); \ + } + +#define GET_LL(i) \ + (((UInt32)s->ll16[i]) | (GET_LL4(i) << 16)) + +#define BZ_GET_SMALL(cccc) \ + /* c_tPos is unsigned, hence test < 0 is pointless. */ \ + if (s->tPos >= (UInt32)100000 * (UInt32)s->blockSize100k) return True; \ + cccc = BZ2_indexIntoF ( s->tPos, s->cftab ); \ + s->tPos = GET_LL(s->tPos); + + +/*-- externs for decompression. --*/ + +extern Int32 +BZ2_indexIntoF ( Int32, Int32* ); + +extern Int32 +BZ2_decompress ( DState* ); + +extern void +BZ2_hbCreateDecodeTables ( Int32*, Int32*, Int32*, UChar*, + Int32, Int32, Int32 ); + + +#endif + + +/*-- BZ_NO_STDIO seems to make NULL disappear on some platforms. --*/ + +#ifdef BZ_NO_STDIO +#ifndef NULL +#define NULL 0 +#endif +#endif + + +/*-------------------------------------------------------------*/ +/*--- end bzlib_private.h ---*/ +/*-------------------------------------------------------------*/ diff --git a/Sources/CBZ2/src/compress.c b/Sources/CBZ2/src/compress.c new file mode 100644 index 0000000..5dfa002 --- /dev/null +++ b/Sources/CBZ2/src/compress.c @@ -0,0 +1,672 @@ + +/*-------------------------------------------------------------*/ +/*--- Compression machinery (not incl block sorting) ---*/ +/*--- compress.c ---*/ +/*-------------------------------------------------------------*/ + +/* ------------------------------------------------------------------ + This file is part of bzip2/libbzip2, a program and library for + lossless, block-sorting data compression. + + bzip2/libbzip2 version 1.0.8 of 13 July 2019 + Copyright (C) 1996-2019 Julian Seward + + Please read the WARNING, DISCLAIMER and PATENTS sections in the + README file. + + This program is released under the terms of the license contained + in the file LICENSE. + ------------------------------------------------------------------ */ + + +/* CHANGES + 0.9.0 -- original version. + 0.9.0a/b -- no changes in this file. + 0.9.0c -- changed setting of nGroups in sendMTFValues() + so as to do a bit better on small files +*/ + +#include "bzlib_private.h" + + +/*---------------------------------------------------*/ +/*--- Bit stream I/O ---*/ +/*---------------------------------------------------*/ + +/*---------------------------------------------------*/ +void BZ2_bsInitWrite ( EState* s ) +{ + s->bsLive = 0; + s->bsBuff = 0; +} + + +/*---------------------------------------------------*/ +static +void bsFinishWrite ( EState* s ) +{ + while (s->bsLive > 0) { + s->zbits[s->numZ] = (UChar)(s->bsBuff >> 24); + s->numZ++; + s->bsBuff <<= 8; + s->bsLive -= 8; + } +} + + +/*---------------------------------------------------*/ +#define bsNEEDW(nz) \ +{ \ + while (s->bsLive >= 8) { \ + s->zbits[s->numZ] \ + = (UChar)(s->bsBuff >> 24); \ + s->numZ++; \ + s->bsBuff <<= 8; \ + s->bsLive -= 8; \ + } \ +} + + +/*---------------------------------------------------*/ +static +__inline__ +void bsW ( EState* s, Int32 n, UInt32 v ) +{ + bsNEEDW ( n ); + s->bsBuff |= (v << (32 - s->bsLive - n)); + s->bsLive += n; +} + + +/*---------------------------------------------------*/ +static +void bsPutUInt32 ( EState* s, UInt32 u ) +{ + bsW ( s, 8, (u >> 24) & 0xffL ); + bsW ( s, 8, (u >> 16) & 0xffL ); + bsW ( s, 8, (u >> 8) & 0xffL ); + bsW ( s, 8, u & 0xffL ); +} + + +/*---------------------------------------------------*/ +static +void bsPutUChar ( EState* s, UChar c ) +{ + bsW( s, 8, (UInt32)c ); +} + + +/*---------------------------------------------------*/ +/*--- The back end proper ---*/ +/*---------------------------------------------------*/ + +/*---------------------------------------------------*/ +static +void makeMaps_e ( EState* s ) +{ + Int32 i; + s->nInUse = 0; + for (i = 0; i < 256; i++) + if (s->inUse[i]) { + s->unseqToSeq[i] = s->nInUse; + s->nInUse++; + } +} + + +/*---------------------------------------------------*/ +static +void generateMTFValues ( EState* s ) +{ + UChar yy[256]; + Int32 i, j; + Int32 zPend; + Int32 wr; + Int32 EOB; + + /* + After sorting (eg, here), + s->arr1 [ 0 .. s->nblock-1 ] holds sorted order, + and + ((UChar*)s->arr2) [ 0 .. s->nblock-1 ] + holds the original block data. + + The first thing to do is generate the MTF values, + and put them in + ((UInt16*)s->arr1) [ 0 .. s->nblock-1 ]. + Because there are strictly fewer or equal MTF values + than block values, ptr values in this area are overwritten + with MTF values only when they are no longer needed. + + The final compressed bitstream is generated into the + area starting at + (UChar*) (&((UChar*)s->arr2)[s->nblock]) + + These storage aliases are set up in bzCompressInit(), + except for the last one, which is arranged in + compressBlock(). + */ + UInt32* ptr = s->ptr; + UChar* block = s->block; + UInt16* mtfv = s->mtfv; + + makeMaps_e ( s ); + EOB = s->nInUse+1; + + for (i = 0; i <= EOB; i++) s->mtfFreq[i] = 0; + + wr = 0; + zPend = 0; + for (i = 0; i < s->nInUse; i++) yy[i] = (UChar) i; + + for (i = 0; i < s->nblock; i++) { + UChar ll_i; + AssertD ( wr <= i, "generateMTFValues(1)" ); + j = ptr[i]-1; if (j < 0) j += s->nblock; + ll_i = s->unseqToSeq[block[j]]; + AssertD ( ll_i < s->nInUse, "generateMTFValues(2a)" ); + + if (yy[0] == ll_i) { + zPend++; + } else { + + if (zPend > 0) { + zPend--; + while (True) { + if (zPend & 1) { + mtfv[wr] = BZ_RUNB; wr++; + s->mtfFreq[BZ_RUNB]++; + } else { + mtfv[wr] = BZ_RUNA; wr++; + s->mtfFreq[BZ_RUNA]++; + } + if (zPend < 2) break; + zPend = (zPend - 2) / 2; + }; + zPend = 0; + } + { + register UChar rtmp; + register UChar* ryy_j; + register UChar rll_i; + rtmp = yy[1]; + yy[1] = yy[0]; + ryy_j = &(yy[1]); + rll_i = ll_i; + while ( rll_i != rtmp ) { + register UChar rtmp2; + ryy_j++; + rtmp2 = rtmp; + rtmp = *ryy_j; + *ryy_j = rtmp2; + }; + yy[0] = rtmp; + j = ryy_j - &(yy[0]); + mtfv[wr] = j+1; wr++; s->mtfFreq[j+1]++; + } + + } + } + + if (zPend > 0) { + zPend--; + while (True) { + if (zPend & 1) { + mtfv[wr] = BZ_RUNB; wr++; + s->mtfFreq[BZ_RUNB]++; + } else { + mtfv[wr] = BZ_RUNA; wr++; + s->mtfFreq[BZ_RUNA]++; + } + if (zPend < 2) break; + zPend = (zPend - 2) / 2; + }; + zPend = 0; + } + + mtfv[wr] = EOB; wr++; s->mtfFreq[EOB]++; + + s->nMTF = wr; +} + + +/*---------------------------------------------------*/ +#define BZ_LESSER_ICOST 0 +#define BZ_GREATER_ICOST 15 + +static +void sendMTFValues ( EState* s ) +{ + Int32 v, t, i, j, gs, ge, totc, bt, bc, iter; + Int32 nSelectors, alphaSize, minLen, maxLen, selCtr; + Int32 nGroups, nBytes; + + /*-- + UChar len [BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE]; + is a global since the decoder also needs it. + + Int32 code[BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE]; + Int32 rfreq[BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE]; + are also globals only used in this proc. + Made global to keep stack frame size small. + --*/ + + + UInt16 cost[BZ_N_GROUPS]; + Int32 fave[BZ_N_GROUPS]; + + UInt16* mtfv = s->mtfv; + + if (s->verbosity >= 3) + VPrintf3( " %d in block, %d after MTF & 1-2 coding, " + "%d+2 syms in use\n", + s->nblock, s->nMTF, s->nInUse ); + + alphaSize = s->nInUse+2; + for (t = 0; t < BZ_N_GROUPS; t++) + for (v = 0; v < alphaSize; v++) + s->len[t][v] = BZ_GREATER_ICOST; + + /*--- Decide how many coding tables to use ---*/ + AssertH ( s->nMTF > 0, 3001 ); + if (s->nMTF < 200) nGroups = 2; else + if (s->nMTF < 600) nGroups = 3; else + if (s->nMTF < 1200) nGroups = 4; else + if (s->nMTF < 2400) nGroups = 5; else + nGroups = 6; + + /*--- Generate an initial set of coding tables ---*/ + { + Int32 nPart, remF, tFreq, aFreq; + + nPart = nGroups; + remF = s->nMTF; + gs = 0; + while (nPart > 0) { + tFreq = remF / nPart; + ge = gs-1; + aFreq = 0; + while (aFreq < tFreq && ge < alphaSize-1) { + ge++; + aFreq += s->mtfFreq[ge]; + } + + if (ge > gs + && nPart != nGroups && nPart != 1 + && ((nGroups-nPart) % 2 == 1)) { + aFreq -= s->mtfFreq[ge]; + ge--; + } + + if (s->verbosity >= 3) + VPrintf5( " initial group %d, [%d .. %d], " + "has %d syms (%4.1f%%)\n", + nPart, gs, ge, aFreq, + (100.0 * (float)aFreq) / (float)(s->nMTF) ); + + for (v = 0; v < alphaSize; v++) + if (v >= gs && v <= ge) + s->len[nPart-1][v] = BZ_LESSER_ICOST; else + s->len[nPart-1][v] = BZ_GREATER_ICOST; + + nPart--; + gs = ge+1; + remF -= aFreq; + } + } + + /*--- + Iterate up to BZ_N_ITERS times to improve the tables. + ---*/ + for (iter = 0; iter < BZ_N_ITERS; iter++) { + + for (t = 0; t < nGroups; t++) fave[t] = 0; + + for (t = 0; t < nGroups; t++) + for (v = 0; v < alphaSize; v++) + s->rfreq[t][v] = 0; + + /*--- + Set up an auxiliary length table which is used to fast-track + the common case (nGroups == 6). + ---*/ + if (nGroups == 6) { + for (v = 0; v < alphaSize; v++) { + s->len_pack[v][0] = (s->len[1][v] << 16) | s->len[0][v]; + s->len_pack[v][1] = (s->len[3][v] << 16) | s->len[2][v]; + s->len_pack[v][2] = (s->len[5][v] << 16) | s->len[4][v]; + } + } + + nSelectors = 0; + totc = 0; + gs = 0; + while (True) { + + /*--- Set group start & end marks. --*/ + if (gs >= s->nMTF) break; + ge = gs + BZ_G_SIZE - 1; + if (ge >= s->nMTF) ge = s->nMTF-1; + + /*-- + Calculate the cost of this group as coded + by each of the coding tables. + --*/ + for (t = 0; t < nGroups; t++) cost[t] = 0; + + if (nGroups == 6 && 50 == ge-gs+1) { + /*--- fast track the common case ---*/ + register UInt32 cost01, cost23, cost45; + register UInt16 icv; + cost01 = cost23 = cost45 = 0; + +# define BZ_ITER(nn) \ + icv = mtfv[gs+(nn)]; \ + cost01 += s->len_pack[icv][0]; \ + cost23 += s->len_pack[icv][1]; \ + cost45 += s->len_pack[icv][2]; \ + + BZ_ITER(0); BZ_ITER(1); BZ_ITER(2); BZ_ITER(3); BZ_ITER(4); + BZ_ITER(5); BZ_ITER(6); BZ_ITER(7); BZ_ITER(8); BZ_ITER(9); + BZ_ITER(10); BZ_ITER(11); BZ_ITER(12); BZ_ITER(13); BZ_ITER(14); + BZ_ITER(15); BZ_ITER(16); BZ_ITER(17); BZ_ITER(18); BZ_ITER(19); + BZ_ITER(20); BZ_ITER(21); BZ_ITER(22); BZ_ITER(23); BZ_ITER(24); + BZ_ITER(25); BZ_ITER(26); BZ_ITER(27); BZ_ITER(28); BZ_ITER(29); + BZ_ITER(30); BZ_ITER(31); BZ_ITER(32); BZ_ITER(33); BZ_ITER(34); + BZ_ITER(35); BZ_ITER(36); BZ_ITER(37); BZ_ITER(38); BZ_ITER(39); + BZ_ITER(40); BZ_ITER(41); BZ_ITER(42); BZ_ITER(43); BZ_ITER(44); + BZ_ITER(45); BZ_ITER(46); BZ_ITER(47); BZ_ITER(48); BZ_ITER(49); + +# undef BZ_ITER + + cost[0] = cost01 & 0xffff; cost[1] = cost01 >> 16; + cost[2] = cost23 & 0xffff; cost[3] = cost23 >> 16; + cost[4] = cost45 & 0xffff; cost[5] = cost45 >> 16; + + } else { + /*--- slow version which correctly handles all situations ---*/ + for (i = gs; i <= ge; i++) { + UInt16 icv = mtfv[i]; + for (t = 0; t < nGroups; t++) cost[t] += s->len[t][icv]; + } + } + + /*-- + Find the coding table which is best for this group, + and record its identity in the selector table. + --*/ + bc = 999999999; bt = -1; + for (t = 0; t < nGroups; t++) + if (cost[t] < bc) { bc = cost[t]; bt = t; }; + totc += bc; + fave[bt]++; + s->selector[nSelectors] = bt; + nSelectors++; + + /*-- + Increment the symbol frequencies for the selected table. + --*/ + if (nGroups == 6 && 50 == ge-gs+1) { + /*--- fast track the common case ---*/ + +# define BZ_ITUR(nn) s->rfreq[bt][ mtfv[gs+(nn)] ]++ + + BZ_ITUR(0); BZ_ITUR(1); BZ_ITUR(2); BZ_ITUR(3); BZ_ITUR(4); + BZ_ITUR(5); BZ_ITUR(6); BZ_ITUR(7); BZ_ITUR(8); BZ_ITUR(9); + BZ_ITUR(10); BZ_ITUR(11); BZ_ITUR(12); BZ_ITUR(13); BZ_ITUR(14); + BZ_ITUR(15); BZ_ITUR(16); BZ_ITUR(17); BZ_ITUR(18); BZ_ITUR(19); + BZ_ITUR(20); BZ_ITUR(21); BZ_ITUR(22); BZ_ITUR(23); BZ_ITUR(24); + BZ_ITUR(25); BZ_ITUR(26); BZ_ITUR(27); BZ_ITUR(28); BZ_ITUR(29); + BZ_ITUR(30); BZ_ITUR(31); BZ_ITUR(32); BZ_ITUR(33); BZ_ITUR(34); + BZ_ITUR(35); BZ_ITUR(36); BZ_ITUR(37); BZ_ITUR(38); BZ_ITUR(39); + BZ_ITUR(40); BZ_ITUR(41); BZ_ITUR(42); BZ_ITUR(43); BZ_ITUR(44); + BZ_ITUR(45); BZ_ITUR(46); BZ_ITUR(47); BZ_ITUR(48); BZ_ITUR(49); + +# undef BZ_ITUR + + } else { + /*--- slow version which correctly handles all situations ---*/ + for (i = gs; i <= ge; i++) + s->rfreq[bt][ mtfv[i] ]++; + } + + gs = ge+1; + } + if (s->verbosity >= 3) { + VPrintf2 ( " pass %d: size is %d, grp uses are ", + iter+1, totc/8 ); + for (t = 0; t < nGroups; t++) + VPrintf1 ( "%d ", fave[t] ); + VPrintf0 ( "\n" ); + } + + /*-- + Recompute the tables based on the accumulated frequencies. + --*/ + /* maxLen was changed from 20 to 17 in bzip2-1.0.3. See + comment in huffman.c for details. */ + for (t = 0; t < nGroups; t++) + BZ2_hbMakeCodeLengths ( &(s->len[t][0]), &(s->rfreq[t][0]), + alphaSize, 17 /*20*/ ); + } + + + AssertH( nGroups < 8, 3002 ); + AssertH( nSelectors < 32768 && + nSelectors <= BZ_MAX_SELECTORS, + 3003 ); + + + /*--- Compute MTF values for the selectors. ---*/ + { + UChar pos[BZ_N_GROUPS], ll_i, tmp2, tmp; + for (i = 0; i < nGroups; i++) pos[i] = i; + for (i = 0; i < nSelectors; i++) { + ll_i = s->selector[i]; + j = 0; + tmp = pos[j]; + while ( ll_i != tmp ) { + j++; + tmp2 = tmp; + tmp = pos[j]; + pos[j] = tmp2; + }; + pos[0] = tmp; + s->selectorMtf[i] = j; + } + }; + + /*--- Assign actual codes for the tables. --*/ + for (t = 0; t < nGroups; t++) { + minLen = 32; + maxLen = 0; + for (i = 0; i < alphaSize; i++) { + if (s->len[t][i] > maxLen) maxLen = s->len[t][i]; + if (s->len[t][i] < minLen) minLen = s->len[t][i]; + } + AssertH ( !(maxLen > 17 /*20*/ ), 3004 ); + AssertH ( !(minLen < 1), 3005 ); + BZ2_hbAssignCodes ( &(s->code[t][0]), &(s->len[t][0]), + minLen, maxLen, alphaSize ); + } + + /*--- Transmit the mapping table. ---*/ + { + Bool inUse16[16]; + for (i = 0; i < 16; i++) { + inUse16[i] = False; + for (j = 0; j < 16; j++) + if (s->inUse[i * 16 + j]) inUse16[i] = True; + } + + nBytes = s->numZ; + for (i = 0; i < 16; i++) + if (inUse16[i]) bsW(s,1,1); else bsW(s,1,0); + + for (i = 0; i < 16; i++) + if (inUse16[i]) + for (j = 0; j < 16; j++) { + if (s->inUse[i * 16 + j]) bsW(s,1,1); else bsW(s,1,0); + } + + if (s->verbosity >= 3) + VPrintf1( " bytes: mapping %d, ", s->numZ-nBytes ); + } + + /*--- Now the selectors. ---*/ + nBytes = s->numZ; + bsW ( s, 3, nGroups ); + bsW ( s, 15, nSelectors ); + for (i = 0; i < nSelectors; i++) { + for (j = 0; j < s->selectorMtf[i]; j++) bsW(s,1,1); + bsW(s,1,0); + } + if (s->verbosity >= 3) + VPrintf1( "selectors %d, ", s->numZ-nBytes ); + + /*--- Now the coding tables. ---*/ + nBytes = s->numZ; + + for (t = 0; t < nGroups; t++) { + Int32 curr = s->len[t][0]; + bsW ( s, 5, curr ); + for (i = 0; i < alphaSize; i++) { + while (curr < s->len[t][i]) { bsW(s,2,2); curr++; /* 10 */ }; + while (curr > s->len[t][i]) { bsW(s,2,3); curr--; /* 11 */ }; + bsW ( s, 1, 0 ); + } + } + + if (s->verbosity >= 3) + VPrintf1 ( "code lengths %d, ", s->numZ-nBytes ); + + /*--- And finally, the block data proper ---*/ + nBytes = s->numZ; + selCtr = 0; + gs = 0; + while (True) { + if (gs >= s->nMTF) break; + ge = gs + BZ_G_SIZE - 1; + if (ge >= s->nMTF) ge = s->nMTF-1; + AssertH ( s->selector[selCtr] < nGroups, 3006 ); + + if (nGroups == 6 && 50 == ge-gs+1) { + /*--- fast track the common case ---*/ + UInt16 mtfv_i; + UChar* s_len_sel_selCtr + = &(s->len[s->selector[selCtr]][0]); + Int32* s_code_sel_selCtr + = &(s->code[s->selector[selCtr]][0]); + +# define BZ_ITAH(nn) \ + mtfv_i = mtfv[gs+(nn)]; \ + bsW ( s, \ + s_len_sel_selCtr[mtfv_i], \ + s_code_sel_selCtr[mtfv_i] ) + + BZ_ITAH(0); BZ_ITAH(1); BZ_ITAH(2); BZ_ITAH(3); BZ_ITAH(4); + BZ_ITAH(5); BZ_ITAH(6); BZ_ITAH(7); BZ_ITAH(8); BZ_ITAH(9); + BZ_ITAH(10); BZ_ITAH(11); BZ_ITAH(12); BZ_ITAH(13); BZ_ITAH(14); + BZ_ITAH(15); BZ_ITAH(16); BZ_ITAH(17); BZ_ITAH(18); BZ_ITAH(19); + BZ_ITAH(20); BZ_ITAH(21); BZ_ITAH(22); BZ_ITAH(23); BZ_ITAH(24); + BZ_ITAH(25); BZ_ITAH(26); BZ_ITAH(27); BZ_ITAH(28); BZ_ITAH(29); + BZ_ITAH(30); BZ_ITAH(31); BZ_ITAH(32); BZ_ITAH(33); BZ_ITAH(34); + BZ_ITAH(35); BZ_ITAH(36); BZ_ITAH(37); BZ_ITAH(38); BZ_ITAH(39); + BZ_ITAH(40); BZ_ITAH(41); BZ_ITAH(42); BZ_ITAH(43); BZ_ITAH(44); + BZ_ITAH(45); BZ_ITAH(46); BZ_ITAH(47); BZ_ITAH(48); BZ_ITAH(49); + +# undef BZ_ITAH + + } else { + /*--- slow version which correctly handles all situations ---*/ + for (i = gs; i <= ge; i++) { + bsW ( s, + s->len [s->selector[selCtr]] [mtfv[i]], + s->code [s->selector[selCtr]] [mtfv[i]] ); + } + } + + + gs = ge+1; + selCtr++; + } + AssertH( selCtr == nSelectors, 3007 ); + + if (s->verbosity >= 3) + VPrintf1( "codes %d\n", s->numZ-nBytes ); +} + + +/*---------------------------------------------------*/ +void BZ2_compressBlock ( EState* s, Bool is_last_block ) +{ + if (s->nblock > 0) { + + BZ_FINALISE_CRC ( s->blockCRC ); + s->combinedCRC = (s->combinedCRC << 1) | (s->combinedCRC >> 31); + s->combinedCRC ^= s->blockCRC; + if (s->blockNo > 1) s->numZ = 0; + + if (s->verbosity >= 2) + VPrintf4( " block %d: crc = 0x%08x, " + "combined CRC = 0x%08x, size = %d\n", + s->blockNo, s->blockCRC, s->combinedCRC, s->nblock ); + + BZ2_blockSort ( s ); + } + + s->zbits = (UChar*) (&((UChar*)s->arr2)[s->nblock]); + + /*-- If this is the first block, create the stream header. --*/ + if (s->blockNo == 1) { + BZ2_bsInitWrite ( s ); + bsPutUChar ( s, BZ_HDR_B ); + bsPutUChar ( s, BZ_HDR_Z ); + bsPutUChar ( s, BZ_HDR_h ); + bsPutUChar ( s, (UChar)(BZ_HDR_0 + s->blockSize100k) ); + } + + if (s->nblock > 0) { + + bsPutUChar ( s, 0x31 ); bsPutUChar ( s, 0x41 ); + bsPutUChar ( s, 0x59 ); bsPutUChar ( s, 0x26 ); + bsPutUChar ( s, 0x53 ); bsPutUChar ( s, 0x59 ); + + /*-- Now the block's CRC, so it is in a known place. --*/ + bsPutUInt32 ( s, s->blockCRC ); + + /*-- + Now a single bit indicating (non-)randomisation. + As of version 0.9.5, we use a better sorting algorithm + which makes randomisation unnecessary. So always set + the randomised bit to 'no'. Of course, the decoder + still needs to be able to handle randomised blocks + so as to maintain backwards compatibility with + older versions of bzip2. + --*/ + bsW(s,1,0); + + bsW ( s, 24, s->origPtr ); + generateMTFValues ( s ); + sendMTFValues ( s ); + } + + + /*-- If this is the last block, add the stream trailer. --*/ + if (is_last_block) { + + bsPutUChar ( s, 0x17 ); bsPutUChar ( s, 0x72 ); + bsPutUChar ( s, 0x45 ); bsPutUChar ( s, 0x38 ); + bsPutUChar ( s, 0x50 ); bsPutUChar ( s, 0x90 ); + bsPutUInt32 ( s, s->combinedCRC ); + if (s->verbosity >= 2) + VPrintf1( " final combined CRC = 0x%08x\n ", s->combinedCRC ); + bsFinishWrite ( s ); + } +} + + +/*-------------------------------------------------------------*/ +/*--- end compress.c ---*/ +/*-------------------------------------------------------------*/ diff --git a/Sources/CBZ2/src/crctable.c b/Sources/CBZ2/src/crctable.c new file mode 100644 index 0000000..2b33c25 --- /dev/null +++ b/Sources/CBZ2/src/crctable.c @@ -0,0 +1,104 @@ + +/*-------------------------------------------------------------*/ +/*--- Table for doing CRCs ---*/ +/*--- crctable.c ---*/ +/*-------------------------------------------------------------*/ + +/* ------------------------------------------------------------------ + This file is part of bzip2/libbzip2, a program and library for + lossless, block-sorting data compression. + + bzip2/libbzip2 version 1.0.8 of 13 July 2019 + Copyright (C) 1996-2019 Julian Seward + + Please read the WARNING, DISCLAIMER and PATENTS sections in the + README file. + + This program is released under the terms of the license contained + in the file LICENSE. + ------------------------------------------------------------------ */ + + +#include "bzlib_private.h" + +/*-- + I think this is an implementation of the AUTODIN-II, + Ethernet & FDDI 32-bit CRC standard. Vaguely derived + from code by Rob Warnock, in Section 51 of the + comp.compression FAQ. +--*/ + +UInt32 BZ2_crc32Table[256] = { + + /*-- Ugly, innit? --*/ + + 0x00000000L, 0x04c11db7L, 0x09823b6eL, 0x0d4326d9L, + 0x130476dcL, 0x17c56b6bL, 0x1a864db2L, 0x1e475005L, + 0x2608edb8L, 0x22c9f00fL, 0x2f8ad6d6L, 0x2b4bcb61L, + 0x350c9b64L, 0x31cd86d3L, 0x3c8ea00aL, 0x384fbdbdL, + 0x4c11db70L, 0x48d0c6c7L, 0x4593e01eL, 0x4152fda9L, + 0x5f15adacL, 0x5bd4b01bL, 0x569796c2L, 0x52568b75L, + 0x6a1936c8L, 0x6ed82b7fL, 0x639b0da6L, 0x675a1011L, + 0x791d4014L, 0x7ddc5da3L, 0x709f7b7aL, 0x745e66cdL, + 0x9823b6e0L, 0x9ce2ab57L, 0x91a18d8eL, 0x95609039L, + 0x8b27c03cL, 0x8fe6dd8bL, 0x82a5fb52L, 0x8664e6e5L, + 0xbe2b5b58L, 0xbaea46efL, 0xb7a96036L, 0xb3687d81L, + 0xad2f2d84L, 0xa9ee3033L, 0xa4ad16eaL, 0xa06c0b5dL, + 0xd4326d90L, 0xd0f37027L, 0xddb056feL, 0xd9714b49L, + 0xc7361b4cL, 0xc3f706fbL, 0xceb42022L, 0xca753d95L, + 0xf23a8028L, 0xf6fb9d9fL, 0xfbb8bb46L, 0xff79a6f1L, + 0xe13ef6f4L, 0xe5ffeb43L, 0xe8bccd9aL, 0xec7dd02dL, + 0x34867077L, 0x30476dc0L, 0x3d044b19L, 0x39c556aeL, + 0x278206abL, 0x23431b1cL, 0x2e003dc5L, 0x2ac12072L, + 0x128e9dcfL, 0x164f8078L, 0x1b0ca6a1L, 0x1fcdbb16L, + 0x018aeb13L, 0x054bf6a4L, 0x0808d07dL, 0x0cc9cdcaL, + 0x7897ab07L, 0x7c56b6b0L, 0x71159069L, 0x75d48ddeL, + 0x6b93dddbL, 0x6f52c06cL, 0x6211e6b5L, 0x66d0fb02L, + 0x5e9f46bfL, 0x5a5e5b08L, 0x571d7dd1L, 0x53dc6066L, + 0x4d9b3063L, 0x495a2dd4L, 0x44190b0dL, 0x40d816baL, + 0xaca5c697L, 0xa864db20L, 0xa527fdf9L, 0xa1e6e04eL, + 0xbfa1b04bL, 0xbb60adfcL, 0xb6238b25L, 0xb2e29692L, + 0x8aad2b2fL, 0x8e6c3698L, 0x832f1041L, 0x87ee0df6L, + 0x99a95df3L, 0x9d684044L, 0x902b669dL, 0x94ea7b2aL, + 0xe0b41de7L, 0xe4750050L, 0xe9362689L, 0xedf73b3eL, + 0xf3b06b3bL, 0xf771768cL, 0xfa325055L, 0xfef34de2L, + 0xc6bcf05fL, 0xc27dede8L, 0xcf3ecb31L, 0xcbffd686L, + 0xd5b88683L, 0xd1799b34L, 0xdc3abdedL, 0xd8fba05aL, + 0x690ce0eeL, 0x6dcdfd59L, 0x608edb80L, 0x644fc637L, + 0x7a089632L, 0x7ec98b85L, 0x738aad5cL, 0x774bb0ebL, + 0x4f040d56L, 0x4bc510e1L, 0x46863638L, 0x42472b8fL, + 0x5c007b8aL, 0x58c1663dL, 0x558240e4L, 0x51435d53L, + 0x251d3b9eL, 0x21dc2629L, 0x2c9f00f0L, 0x285e1d47L, + 0x36194d42L, 0x32d850f5L, 0x3f9b762cL, 0x3b5a6b9bL, + 0x0315d626L, 0x07d4cb91L, 0x0a97ed48L, 0x0e56f0ffL, + 0x1011a0faL, 0x14d0bd4dL, 0x19939b94L, 0x1d528623L, + 0xf12f560eL, 0xf5ee4bb9L, 0xf8ad6d60L, 0xfc6c70d7L, + 0xe22b20d2L, 0xe6ea3d65L, 0xeba91bbcL, 0xef68060bL, + 0xd727bbb6L, 0xd3e6a601L, 0xdea580d8L, 0xda649d6fL, + 0xc423cd6aL, 0xc0e2d0ddL, 0xcda1f604L, 0xc960ebb3L, + 0xbd3e8d7eL, 0xb9ff90c9L, 0xb4bcb610L, 0xb07daba7L, + 0xae3afba2L, 0xaafbe615L, 0xa7b8c0ccL, 0xa379dd7bL, + 0x9b3660c6L, 0x9ff77d71L, 0x92b45ba8L, 0x9675461fL, + 0x8832161aL, 0x8cf30badL, 0x81b02d74L, 0x857130c3L, + 0x5d8a9099L, 0x594b8d2eL, 0x5408abf7L, 0x50c9b640L, + 0x4e8ee645L, 0x4a4ffbf2L, 0x470cdd2bL, 0x43cdc09cL, + 0x7b827d21L, 0x7f436096L, 0x7200464fL, 0x76c15bf8L, + 0x68860bfdL, 0x6c47164aL, 0x61043093L, 0x65c52d24L, + 0x119b4be9L, 0x155a565eL, 0x18197087L, 0x1cd86d30L, + 0x029f3d35L, 0x065e2082L, 0x0b1d065bL, 0x0fdc1becL, + 0x3793a651L, 0x3352bbe6L, 0x3e119d3fL, 0x3ad08088L, + 0x2497d08dL, 0x2056cd3aL, 0x2d15ebe3L, 0x29d4f654L, + 0xc5a92679L, 0xc1683bceL, 0xcc2b1d17L, 0xc8ea00a0L, + 0xd6ad50a5L, 0xd26c4d12L, 0xdf2f6bcbL, 0xdbee767cL, + 0xe3a1cbc1L, 0xe760d676L, 0xea23f0afL, 0xeee2ed18L, + 0xf0a5bd1dL, 0xf464a0aaL, 0xf9278673L, 0xfde69bc4L, + 0x89b8fd09L, 0x8d79e0beL, 0x803ac667L, 0x84fbdbd0L, + 0x9abc8bd5L, 0x9e7d9662L, 0x933eb0bbL, 0x97ffad0cL, + 0xafb010b1L, 0xab710d06L, 0xa6322bdfL, 0xa2f33668L, + 0xbcb4666dL, 0xb8757bdaL, 0xb5365d03L, 0xb1f740b4L +}; + + +/*-------------------------------------------------------------*/ +/*--- end crctable.c ---*/ +/*-------------------------------------------------------------*/ diff --git a/Sources/CBZ2/src/decompress.c b/Sources/CBZ2/src/decompress.c new file mode 100644 index 0000000..a1a0bac --- /dev/null +++ b/Sources/CBZ2/src/decompress.c @@ -0,0 +1,652 @@ + +/*-------------------------------------------------------------*/ +/*--- Decompression machinery ---*/ +/*--- decompress.c ---*/ +/*-------------------------------------------------------------*/ + +/* ------------------------------------------------------------------ + This file is part of bzip2/libbzip2, a program and library for + lossless, block-sorting data compression. + + bzip2/libbzip2 version 1.0.8 of 13 July 2019 + Copyright (C) 1996-2019 Julian Seward + + Please read the WARNING, DISCLAIMER and PATENTS sections in the + README file. + + This program is released under the terms of the license contained + in the file LICENSE. + ------------------------------------------------------------------ */ + + +#include "bzlib_private.h" + + +/*---------------------------------------------------*/ +static +void makeMaps_d ( DState* s ) +{ + Int32 i; + s->nInUse = 0; + for (i = 0; i < 256; i++) + if (s->inUse[i]) { + s->seqToUnseq[s->nInUse] = i; + s->nInUse++; + } +} + + +/*---------------------------------------------------*/ +#define RETURN(rrr) \ + { retVal = rrr; goto save_state_and_return; }; + +#define GET_BITS(lll,vvv,nnn) \ + case lll: s->state = lll; \ + while (True) { \ + if (s->bsLive >= nnn) { \ + UInt32 v; \ + v = (s->bsBuff >> \ + (s->bsLive-nnn)) & ((1 << nnn)-1); \ + s->bsLive -= nnn; \ + vvv = v; \ + break; \ + } \ + if (s->strm->avail_in == 0) RETURN(BZ_OK); \ + s->bsBuff \ + = (s->bsBuff << 8) | \ + ((UInt32) \ + (*((UChar*)(s->strm->next_in)))); \ + s->bsLive += 8; \ + s->strm->next_in++; \ + s->strm->avail_in--; \ + s->strm->total_in_lo32++; \ + if (s->strm->total_in_lo32 == 0) \ + s->strm->total_in_hi32++; \ + } + +#define GET_UCHAR(lll,uuu) \ + GET_BITS(lll,uuu,8) + +#define GET_BIT(lll,uuu) \ + GET_BITS(lll,uuu,1) + +/*---------------------------------------------------*/ +#define GET_MTF_VAL(label1,label2,lval) \ +{ \ + if (groupPos == 0) { \ + groupNo++; \ + if (groupNo >= nSelectors) \ + RETURN(BZ_DATA_ERROR); \ + groupPos = BZ_G_SIZE; \ + gSel = s->selector[groupNo]; \ + gMinlen = s->minLens[gSel]; \ + gLimit = &(s->limit[gSel][0]); \ + gPerm = &(s->perm[gSel][0]); \ + gBase = &(s->base[gSel][0]); \ + } \ + groupPos--; \ + zn = gMinlen; \ + GET_BITS(label1, zvec, zn); \ + while (1) { \ + if (zn > 20 /* the longest code */) \ + RETURN(BZ_DATA_ERROR); \ + if (zvec <= gLimit[zn]) break; \ + zn++; \ + GET_BIT(label2, zj); \ + zvec = (zvec << 1) | zj; \ + }; \ + if (zvec - gBase[zn] < 0 \ + || zvec - gBase[zn] >= BZ_MAX_ALPHA_SIZE) \ + RETURN(BZ_DATA_ERROR); \ + lval = gPerm[zvec - gBase[zn]]; \ +} + + +/*---------------------------------------------------*/ +Int32 BZ2_decompress ( DState* s ) +{ + UChar uc; + Int32 retVal; + Int32 minLen, maxLen; + bz_stream* strm = s->strm; + + /* stuff that needs to be saved/restored */ + Int32 i; + Int32 j; + Int32 t; + Int32 alphaSize; + Int32 nGroups; + Int32 nSelectors; + Int32 EOB; + Int32 groupNo; + Int32 groupPos; + Int32 nextSym; + Int32 nblockMAX; + Int32 nblock; + Int32 es; + Int32 N; + Int32 curr; + Int32 zt; + Int32 zn; + Int32 zvec; + Int32 zj; + Int32 gSel; + Int32 gMinlen; + Int32* gLimit; + Int32* gBase; + Int32* gPerm; + + if (s->state == BZ_X_MAGIC_1) { + /*initialise the save area*/ + s->save_i = 0; + s->save_j = 0; + s->save_t = 0; + s->save_alphaSize = 0; + s->save_nGroups = 0; + s->save_nSelectors = 0; + s->save_EOB = 0; + s->save_groupNo = 0; + s->save_groupPos = 0; + s->save_nextSym = 0; + s->save_nblockMAX = 0; + s->save_nblock = 0; + s->save_es = 0; + s->save_N = 0; + s->save_curr = 0; + s->save_zt = 0; + s->save_zn = 0; + s->save_zvec = 0; + s->save_zj = 0; + s->save_gSel = 0; + s->save_gMinlen = 0; + s->save_gLimit = NULL; + s->save_gBase = NULL; + s->save_gPerm = NULL; + } + + /*restore from the save area*/ + i = s->save_i; + j = s->save_j; + t = s->save_t; + alphaSize = s->save_alphaSize; + nGroups = s->save_nGroups; + nSelectors = s->save_nSelectors; + EOB = s->save_EOB; + groupNo = s->save_groupNo; + groupPos = s->save_groupPos; + nextSym = s->save_nextSym; + nblockMAX = s->save_nblockMAX; + nblock = s->save_nblock; + es = s->save_es; + N = s->save_N; + curr = s->save_curr; + zt = s->save_zt; + zn = s->save_zn; + zvec = s->save_zvec; + zj = s->save_zj; + gSel = s->save_gSel; + gMinlen = s->save_gMinlen; + gLimit = s->save_gLimit; + gBase = s->save_gBase; + gPerm = s->save_gPerm; + + retVal = BZ_OK; + + switch (s->state) { + + GET_UCHAR(BZ_X_MAGIC_1, uc); + if (uc != BZ_HDR_B) RETURN(BZ_DATA_ERROR_MAGIC); + + GET_UCHAR(BZ_X_MAGIC_2, uc); + if (uc != BZ_HDR_Z) RETURN(BZ_DATA_ERROR_MAGIC); + + GET_UCHAR(BZ_X_MAGIC_3, uc) + if (uc != BZ_HDR_h) RETURN(BZ_DATA_ERROR_MAGIC); + + GET_BITS(BZ_X_MAGIC_4, s->blockSize100k, 8) + if (s->blockSize100k < (BZ_HDR_0 + 1) || + s->blockSize100k > (BZ_HDR_0 + 9)) RETURN(BZ_DATA_ERROR_MAGIC); + s->blockSize100k -= BZ_HDR_0; + + if (s->smallDecompress) { + s->ll16 = BZALLOC( s->blockSize100k * 100000 * sizeof(UInt16) ); + s->ll4 = BZALLOC( + ((1 + s->blockSize100k * 100000) >> 1) * sizeof(UChar) + ); + if (s->ll16 == NULL || s->ll4 == NULL) RETURN(BZ_MEM_ERROR); + } else { + s->tt = BZALLOC( s->blockSize100k * 100000 * sizeof(Int32) ); + if (s->tt == NULL) RETURN(BZ_MEM_ERROR); + } + + GET_UCHAR(BZ_X_BLKHDR_1, uc); + + if (uc == 0x17) goto endhdr_2; + if (uc != 0x31) RETURN(BZ_DATA_ERROR); + GET_UCHAR(BZ_X_BLKHDR_2, uc); + if (uc != 0x41) RETURN(BZ_DATA_ERROR); + GET_UCHAR(BZ_X_BLKHDR_3, uc); + if (uc != 0x59) RETURN(BZ_DATA_ERROR); + GET_UCHAR(BZ_X_BLKHDR_4, uc); + if (uc != 0x26) RETURN(BZ_DATA_ERROR); + GET_UCHAR(BZ_X_BLKHDR_5, uc); + if (uc != 0x53) RETURN(BZ_DATA_ERROR); + GET_UCHAR(BZ_X_BLKHDR_6, uc); + if (uc != 0x59) RETURN(BZ_DATA_ERROR); + + s->currBlockNo++; + if (s->verbosity >= 2) + VPrintf1 ( "\n [%d: huff+mtf ", s->currBlockNo ); + + s->storedBlockCRC = 0; + GET_UCHAR(BZ_X_BCRC_1, uc); + s->storedBlockCRC = (s->storedBlockCRC << 8) | ((UInt32)uc); + GET_UCHAR(BZ_X_BCRC_2, uc); + s->storedBlockCRC = (s->storedBlockCRC << 8) | ((UInt32)uc); + GET_UCHAR(BZ_X_BCRC_3, uc); + s->storedBlockCRC = (s->storedBlockCRC << 8) | ((UInt32)uc); + GET_UCHAR(BZ_X_BCRC_4, uc); + s->storedBlockCRC = (s->storedBlockCRC << 8) | ((UInt32)uc); + + GET_BITS(BZ_X_RANDBIT, s->blockRandomised, 1); + + s->origPtr = 0; + GET_UCHAR(BZ_X_ORIGPTR_1, uc); + s->origPtr = (s->origPtr << 8) | ((Int32)uc); + GET_UCHAR(BZ_X_ORIGPTR_2, uc); + s->origPtr = (s->origPtr << 8) | ((Int32)uc); + GET_UCHAR(BZ_X_ORIGPTR_3, uc); + s->origPtr = (s->origPtr << 8) | ((Int32)uc); + + if (s->origPtr < 0) + RETURN(BZ_DATA_ERROR); + if (s->origPtr > 10 + 100000*s->blockSize100k) + RETURN(BZ_DATA_ERROR); + + /*--- Receive the mapping table ---*/ + for (i = 0; i < 16; i++) { + GET_BIT(BZ_X_MAPPING_1, uc); + if (uc == 1) + s->inUse16[i] = True; else + s->inUse16[i] = False; + } + + for (i = 0; i < 256; i++) s->inUse[i] = False; + + for (i = 0; i < 16; i++) + if (s->inUse16[i]) + for (j = 0; j < 16; j++) { + GET_BIT(BZ_X_MAPPING_2, uc); + if (uc == 1) s->inUse[i * 16 + j] = True; + } + makeMaps_d ( s ); + if (s->nInUse == 0) RETURN(BZ_DATA_ERROR); + alphaSize = s->nInUse+2; + + /*--- Now the selectors ---*/ + GET_BITS(BZ_X_SELECTOR_1, nGroups, 3); + if (nGroups < 2 || nGroups > BZ_N_GROUPS) RETURN(BZ_DATA_ERROR); + GET_BITS(BZ_X_SELECTOR_2, nSelectors, 15); + if (nSelectors < 1) RETURN(BZ_DATA_ERROR); + for (i = 0; i < nSelectors; i++) { + j = 0; + while (True) { + GET_BIT(BZ_X_SELECTOR_3, uc); + if (uc == 0) break; + j++; + if (j >= nGroups) RETURN(BZ_DATA_ERROR); + } + /* Having more than BZ_MAX_SELECTORS doesn't make much sense + since they will never be used, but some implementations might + "round up" the number of selectors, so just ignore those. */ + if (i < BZ_MAX_SELECTORS) + s->selectorMtf[i] = j; + } + if (nSelectors > BZ_MAX_SELECTORS) + nSelectors = BZ_MAX_SELECTORS; + + /*--- Undo the MTF values for the selectors. ---*/ + { + UChar pos[BZ_N_GROUPS], tmp, v; + for (v = 0; v < nGroups; v++) pos[v] = v; + + for (i = 0; i < nSelectors; i++) { + v = s->selectorMtf[i]; + tmp = pos[v]; + while (v > 0) { pos[v] = pos[v-1]; v--; } + pos[0] = tmp; + s->selector[i] = tmp; + } + } + + /*--- Now the coding tables ---*/ + for (t = 0; t < nGroups; t++) { + GET_BITS(BZ_X_CODING_1, curr, 5); + for (i = 0; i < alphaSize; i++) { + while (True) { + if (curr < 1 || curr > 20) RETURN(BZ_DATA_ERROR); + GET_BIT(BZ_X_CODING_2, uc); + if (uc == 0) break; + GET_BIT(BZ_X_CODING_3, uc); + if (uc == 0) curr++; else curr--; + } + s->len[t][i] = curr; + } + } + + /*--- Create the Huffman decoding tables ---*/ + for (t = 0; t < nGroups; t++) { + minLen = 32; + maxLen = 0; + for (i = 0; i < alphaSize; i++) { + if (s->len[t][i] > maxLen) maxLen = s->len[t][i]; + if (s->len[t][i] < minLen) minLen = s->len[t][i]; + } + BZ2_hbCreateDecodeTables ( + &(s->limit[t][0]), + &(s->base[t][0]), + &(s->perm[t][0]), + &(s->len[t][0]), + minLen, maxLen, alphaSize + ); + s->minLens[t] = minLen; + } + + /*--- Now the MTF values ---*/ + + EOB = s->nInUse+1; + nblockMAX = 100000 * s->blockSize100k; + groupNo = -1; + groupPos = 0; + + for (i = 0; i <= 255; i++) s->unzftab[i] = 0; + + /*-- MTF init --*/ + { + Int32 ii, jj, kk; + kk = MTFA_SIZE-1; + for (ii = 256 / MTFL_SIZE - 1; ii >= 0; ii--) { + for (jj = MTFL_SIZE-1; jj >= 0; jj--) { + s->mtfa[kk] = (UChar)(ii * MTFL_SIZE + jj); + kk--; + } + s->mtfbase[ii] = kk + 1; + } + } + /*-- end MTF init --*/ + + nblock = 0; + GET_MTF_VAL(BZ_X_MTF_1, BZ_X_MTF_2, nextSym); + + while (True) { + + if (nextSym == EOB) break; + + if (nextSym == BZ_RUNA || nextSym == BZ_RUNB) { + + es = -1; + N = 1; + do { + /* Check that N doesn't get too big, so that es doesn't + go negative. The maximum value that can be + RUNA/RUNB encoded is equal to the block size (post + the initial RLE), viz, 900k, so bounding N at 2 + million should guard against overflow without + rejecting any legitimate inputs. */ + if (N >= 2*1024*1024) RETURN(BZ_DATA_ERROR); + if (nextSym == BZ_RUNA) es = es + (0+1) * N; else + if (nextSym == BZ_RUNB) es = es + (1+1) * N; + N = N * 2; + GET_MTF_VAL(BZ_X_MTF_3, BZ_X_MTF_4, nextSym); + } + while (nextSym == BZ_RUNA || nextSym == BZ_RUNB); + + es++; + uc = s->seqToUnseq[ s->mtfa[s->mtfbase[0]] ]; + s->unzftab[uc] += es; + + if (s->smallDecompress) + while (es > 0) { + if (nblock >= nblockMAX) RETURN(BZ_DATA_ERROR); + s->ll16[nblock] = (UInt16)uc; + nblock++; + es--; + } + else + while (es > 0) { + if (nblock >= nblockMAX) RETURN(BZ_DATA_ERROR); + s->tt[nblock] = (UInt32)uc; + nblock++; + es--; + }; + + continue; + + } else { + + if (nblock >= nblockMAX) RETURN(BZ_DATA_ERROR); + + /*-- uc = MTF ( nextSym-1 ) --*/ + { + Int32 ii, jj, kk, pp, lno, off; + UInt32 nn; + nn = (UInt32)(nextSym - 1); + + if (nn < MTFL_SIZE) { + /* avoid general-case expense */ + pp = s->mtfbase[0]; + uc = s->mtfa[pp+nn]; + while (nn > 3) { + Int32 z = pp+nn; + s->mtfa[(z) ] = s->mtfa[(z)-1]; + s->mtfa[(z)-1] = s->mtfa[(z)-2]; + s->mtfa[(z)-2] = s->mtfa[(z)-3]; + s->mtfa[(z)-3] = s->mtfa[(z)-4]; + nn -= 4; + } + while (nn > 0) { + s->mtfa[(pp+nn)] = s->mtfa[(pp+nn)-1]; nn--; + }; + s->mtfa[pp] = uc; + } else { + /* general case */ + lno = nn / MTFL_SIZE; + off = nn % MTFL_SIZE; + pp = s->mtfbase[lno] + off; + uc = s->mtfa[pp]; + while (pp > s->mtfbase[lno]) { + s->mtfa[pp] = s->mtfa[pp-1]; pp--; + }; + s->mtfbase[lno]++; + while (lno > 0) { + s->mtfbase[lno]--; + s->mtfa[s->mtfbase[lno]] + = s->mtfa[s->mtfbase[lno-1] + MTFL_SIZE - 1]; + lno--; + } + s->mtfbase[0]--; + s->mtfa[s->mtfbase[0]] = uc; + if (s->mtfbase[0] == 0) { + kk = MTFA_SIZE-1; + for (ii = 256 / MTFL_SIZE-1; ii >= 0; ii--) { + for (jj = MTFL_SIZE-1; jj >= 0; jj--) { + s->mtfa[kk] = s->mtfa[s->mtfbase[ii] + jj]; + kk--; + } + s->mtfbase[ii] = kk + 1; + } + } + } + } + /*-- end uc = MTF ( nextSym-1 ) --*/ + + s->unzftab[s->seqToUnseq[uc]]++; + if (s->smallDecompress) + s->ll16[nblock] = (UInt16)(s->seqToUnseq[uc]); else + s->tt[nblock] = (UInt32)(s->seqToUnseq[uc]); + nblock++; + + GET_MTF_VAL(BZ_X_MTF_5, BZ_X_MTF_6, nextSym); + continue; + } + } + + /* Now we know what nblock is, we can do a better sanity + check on s->origPtr. + */ + if (s->origPtr < 0 || s->origPtr >= nblock) + RETURN(BZ_DATA_ERROR); + + /*-- Set up cftab to facilitate generation of T^(-1) --*/ + /* Check: unzftab entries in range. */ + for (i = 0; i <= 255; i++) { + if (s->unzftab[i] < 0 || s->unzftab[i] > nblock) + RETURN(BZ_DATA_ERROR); + } + /* Actually generate cftab. */ + s->cftab[0] = 0; + for (i = 1; i <= 256; i++) s->cftab[i] = s->unzftab[i-1]; + for (i = 1; i <= 256; i++) s->cftab[i] += s->cftab[i-1]; + /* Check: cftab entries in range. */ + for (i = 0; i <= 256; i++) { + if (s->cftab[i] < 0 || s->cftab[i] > nblock) { + /* s->cftab[i] can legitimately be == nblock */ + RETURN(BZ_DATA_ERROR); + } + } + /* Check: cftab entries non-descending. */ + for (i = 1; i <= 256; i++) { + if (s->cftab[i-1] > s->cftab[i]) { + RETURN(BZ_DATA_ERROR); + } + } + + s->state_out_len = 0; + s->state_out_ch = 0; + BZ_INITIALISE_CRC ( s->calculatedBlockCRC ); + s->state = BZ_X_OUTPUT; + if (s->verbosity >= 2) VPrintf0 ( "rt+rld" ); + + if (s->smallDecompress) { + + /*-- Make a copy of cftab, used in generation of T --*/ + for (i = 0; i <= 256; i++) s->cftabCopy[i] = s->cftab[i]; + + /*-- compute the T vector --*/ + for (i = 0; i < nblock; i++) { + uc = (UChar)(s->ll16[i]); + SET_LL(i, s->cftabCopy[uc]); + s->cftabCopy[uc]++; + } + + /*-- Compute T^(-1) by pointer reversal on T --*/ + i = s->origPtr; + j = GET_LL(i); + do { + Int32 tmp = GET_LL(j); + SET_LL(j, i); + i = j; + j = tmp; + } + while (i != s->origPtr); + + s->tPos = s->origPtr; + s->nblock_used = 0; + if (s->blockRandomised) { + BZ_RAND_INIT_MASK; + BZ_GET_SMALL(s->k0); s->nblock_used++; + BZ_RAND_UPD_MASK; s->k0 ^= BZ_RAND_MASK; + } else { + BZ_GET_SMALL(s->k0); s->nblock_used++; + } + + } else { + + /*-- compute the T^(-1) vector --*/ + for (i = 0; i < nblock; i++) { + uc = (UChar)(s->tt[i] & 0xff); + s->tt[s->cftab[uc]] |= (i << 8); + s->cftab[uc]++; + } + + s->tPos = s->tt[s->origPtr] >> 8; + s->nblock_used = 0; + if (s->blockRandomised) { + BZ_RAND_INIT_MASK; + BZ_GET_FAST(s->k0); s->nblock_used++; + BZ_RAND_UPD_MASK; s->k0 ^= BZ_RAND_MASK; + } else { + BZ_GET_FAST(s->k0); s->nblock_used++; + } + + } + + RETURN(BZ_OK); + + + + endhdr_2: + + GET_UCHAR(BZ_X_ENDHDR_2, uc); + if (uc != 0x72) RETURN(BZ_DATA_ERROR); + GET_UCHAR(BZ_X_ENDHDR_3, uc); + if (uc != 0x45) RETURN(BZ_DATA_ERROR); + GET_UCHAR(BZ_X_ENDHDR_4, uc); + if (uc != 0x38) RETURN(BZ_DATA_ERROR); + GET_UCHAR(BZ_X_ENDHDR_5, uc); + if (uc != 0x50) RETURN(BZ_DATA_ERROR); + GET_UCHAR(BZ_X_ENDHDR_6, uc); + if (uc != 0x90) RETURN(BZ_DATA_ERROR); + + s->storedCombinedCRC = 0; + GET_UCHAR(BZ_X_CCRC_1, uc); + s->storedCombinedCRC = (s->storedCombinedCRC << 8) | ((UInt32)uc); + GET_UCHAR(BZ_X_CCRC_2, uc); + s->storedCombinedCRC = (s->storedCombinedCRC << 8) | ((UInt32)uc); + GET_UCHAR(BZ_X_CCRC_3, uc); + s->storedCombinedCRC = (s->storedCombinedCRC << 8) | ((UInt32)uc); + GET_UCHAR(BZ_X_CCRC_4, uc); + s->storedCombinedCRC = (s->storedCombinedCRC << 8) | ((UInt32)uc); + + s->state = BZ_X_IDLE; + RETURN(BZ_STREAM_END); + + default: AssertH ( False, 4001 ); + } + + AssertH ( False, 4002 ); + + save_state_and_return: + + s->save_i = i; + s->save_j = j; + s->save_t = t; + s->save_alphaSize = alphaSize; + s->save_nGroups = nGroups; + s->save_nSelectors = nSelectors; + s->save_EOB = EOB; + s->save_groupNo = groupNo; + s->save_groupPos = groupPos; + s->save_nextSym = nextSym; + s->save_nblockMAX = nblockMAX; + s->save_nblock = nblock; + s->save_es = es; + s->save_N = N; + s->save_curr = curr; + s->save_zt = zt; + s->save_zn = zn; + s->save_zvec = zvec; + s->save_zj = zj; + s->save_gSel = gSel; + s->save_gMinlen = gMinlen; + s->save_gLimit = gLimit; + s->save_gBase = gBase; + s->save_gPerm = gPerm; + + return retVal; +} + + +/*-------------------------------------------------------------*/ +/*--- end decompress.c ---*/ +/*-------------------------------------------------------------*/ diff --git a/Sources/CBZ2/src/huffman.c b/Sources/CBZ2/src/huffman.c new file mode 100644 index 0000000..43a1899 --- /dev/null +++ b/Sources/CBZ2/src/huffman.c @@ -0,0 +1,205 @@ + +/*-------------------------------------------------------------*/ +/*--- Huffman coding low-level stuff ---*/ +/*--- huffman.c ---*/ +/*-------------------------------------------------------------*/ + +/* ------------------------------------------------------------------ + This file is part of bzip2/libbzip2, a program and library for + lossless, block-sorting data compression. + + bzip2/libbzip2 version 1.0.8 of 13 July 2019 + Copyright (C) 1996-2019 Julian Seward + + Please read the WARNING, DISCLAIMER and PATENTS sections in the + README file. + + This program is released under the terms of the license contained + in the file LICENSE. + ------------------------------------------------------------------ */ + + +#include "bzlib_private.h" + +/*---------------------------------------------------*/ +#define WEIGHTOF(zz0) ((zz0) & 0xffffff00) +#define DEPTHOF(zz1) ((zz1) & 0x000000ff) +#define MYMAX(zz2,zz3) ((zz2) > (zz3) ? (zz2) : (zz3)) + +#define ADDWEIGHTS(zw1,zw2) \ + (WEIGHTOF(zw1)+WEIGHTOF(zw2)) | \ + (1 + MYMAX(DEPTHOF(zw1),DEPTHOF(zw2))) + +#define UPHEAP(z) \ +{ \ + Int32 zz, tmp; \ + zz = z; tmp = heap[zz]; \ + while (weight[tmp] < weight[heap[zz >> 1]]) { \ + heap[zz] = heap[zz >> 1]; \ + zz >>= 1; \ + } \ + heap[zz] = tmp; \ +} + +#define DOWNHEAP(z) \ +{ \ + Int32 zz, yy, tmp; \ + zz = z; tmp = heap[zz]; \ + while (True) { \ + yy = zz << 1; \ + if (yy > nHeap) break; \ + if (yy < nHeap && \ + weight[heap[yy+1]] < weight[heap[yy]]) \ + yy++; \ + if (weight[tmp] < weight[heap[yy]]) break; \ + heap[zz] = heap[yy]; \ + zz = yy; \ + } \ + heap[zz] = tmp; \ +} + + +/*---------------------------------------------------*/ +void BZ2_hbMakeCodeLengths ( UChar *len, + Int32 *freq, + Int32 alphaSize, + Int32 maxLen ) +{ + /*-- + Nodes and heap entries run from 1. Entry 0 + for both the heap and nodes is a sentinel. + --*/ + Int32 nNodes, nHeap, n1, n2, i, j, k; + Bool tooLong; + + Int32 heap [ BZ_MAX_ALPHA_SIZE + 2 ]; + Int32 weight [ BZ_MAX_ALPHA_SIZE * 2 ]; + Int32 parent [ BZ_MAX_ALPHA_SIZE * 2 ]; + + for (i = 0; i < alphaSize; i++) + weight[i+1] = (freq[i] == 0 ? 1 : freq[i]) << 8; + + while (True) { + + nNodes = alphaSize; + nHeap = 0; + + heap[0] = 0; + weight[0] = 0; + parent[0] = -2; + + for (i = 1; i <= alphaSize; i++) { + parent[i] = -1; + nHeap++; + heap[nHeap] = i; + UPHEAP(nHeap); + } + + AssertH( nHeap < (BZ_MAX_ALPHA_SIZE+2), 2001 ); + + while (nHeap > 1) { + n1 = heap[1]; heap[1] = heap[nHeap]; nHeap--; DOWNHEAP(1); + n2 = heap[1]; heap[1] = heap[nHeap]; nHeap--; DOWNHEAP(1); + nNodes++; + parent[n1] = parent[n2] = nNodes; + weight[nNodes] = ADDWEIGHTS(weight[n1], weight[n2]); + parent[nNodes] = -1; + nHeap++; + heap[nHeap] = nNodes; + UPHEAP(nHeap); + } + + AssertH( nNodes < (BZ_MAX_ALPHA_SIZE * 2), 2002 ); + + tooLong = False; + for (i = 1; i <= alphaSize; i++) { + j = 0; + k = i; + while (parent[k] >= 0) { k = parent[k]; j++; } + len[i-1] = j; + if (j > maxLen) tooLong = True; + } + + if (! tooLong) break; + + /* 17 Oct 04: keep-going condition for the following loop used + to be 'i < alphaSize', which missed the last element, + theoretically leading to the possibility of the compressor + looping. However, this count-scaling step is only needed if + one of the generated Huffman code words is longer than + maxLen, which up to and including version 1.0.2 was 20 bits, + which is extremely unlikely. In version 1.0.3 maxLen was + changed to 17 bits, which has minimal effect on compression + ratio, but does mean this scaling step is used from time to + time, enough to verify that it works. + + This means that bzip2-1.0.3 and later will only produce + Huffman codes with a maximum length of 17 bits. However, in + order to preserve backwards compatibility with bitstreams + produced by versions pre-1.0.3, the decompressor must still + handle lengths of up to 20. */ + + for (i = 1; i <= alphaSize; i++) { + j = weight[i] >> 8; + j = 1 + (j / 2); + weight[i] = j << 8; + } + } +} + + +/*---------------------------------------------------*/ +void BZ2_hbAssignCodes ( Int32 *code, + UChar *length, + Int32 minLen, + Int32 maxLen, + Int32 alphaSize ) +{ + Int32 n, vec, i; + + vec = 0; + for (n = minLen; n <= maxLen; n++) { + for (i = 0; i < alphaSize; i++) + if (length[i] == n) { code[i] = vec; vec++; }; + vec <<= 1; + } +} + + +/*---------------------------------------------------*/ +void BZ2_hbCreateDecodeTables ( Int32 *limit, + Int32 *base, + Int32 *perm, + UChar *length, + Int32 minLen, + Int32 maxLen, + Int32 alphaSize ) +{ + Int32 pp, i, j, vec; + + pp = 0; + for (i = minLen; i <= maxLen; i++) + for (j = 0; j < alphaSize; j++) + if (length[j] == i) { perm[pp] = j; pp++; }; + + for (i = 0; i < BZ_MAX_CODE_LEN; i++) base[i] = 0; + for (i = 0; i < alphaSize; i++) base[length[i]+1]++; + + for (i = 1; i < BZ_MAX_CODE_LEN; i++) base[i] += base[i-1]; + + for (i = 0; i < BZ_MAX_CODE_LEN; i++) limit[i] = 0; + vec = 0; + + for (i = minLen; i <= maxLen; i++) { + vec += (base[i+1] - base[i]); + limit[i] = vec-1; + vec <<= 1; + } + for (i = minLen + 1; i <= maxLen; i++) + base[i] = ((limit[i-1] + 1) << 1) - base[i]; +} + + +/*-------------------------------------------------------------*/ +/*--- end huffman.c ---*/ +/*-------------------------------------------------------------*/ diff --git a/Sources/CBZ2/src/randtable.c b/Sources/CBZ2/src/randtable.c new file mode 100644 index 0000000..bdc6d4a --- /dev/null +++ b/Sources/CBZ2/src/randtable.c @@ -0,0 +1,84 @@ + +/*-------------------------------------------------------------*/ +/*--- Table for randomising repetitive blocks ---*/ +/*--- randtable.c ---*/ +/*-------------------------------------------------------------*/ + +/* ------------------------------------------------------------------ + This file is part of bzip2/libbzip2, a program and library for + lossless, block-sorting data compression. + + bzip2/libbzip2 version 1.0.8 of 13 July 2019 + Copyright (C) 1996-2019 Julian Seward + + Please read the WARNING, DISCLAIMER and PATENTS sections in the + README file. + + This program is released under the terms of the license contained + in the file LICENSE. + ------------------------------------------------------------------ */ + + +#include "bzlib_private.h" + + +/*---------------------------------------------*/ +Int32 BZ2_rNums[512] = { + 619, 720, 127, 481, 931, 816, 813, 233, 566, 247, + 985, 724, 205, 454, 863, 491, 741, 242, 949, 214, + 733, 859, 335, 708, 621, 574, 73, 654, 730, 472, + 419, 436, 278, 496, 867, 210, 399, 680, 480, 51, + 878, 465, 811, 169, 869, 675, 611, 697, 867, 561, + 862, 687, 507, 283, 482, 129, 807, 591, 733, 623, + 150, 238, 59, 379, 684, 877, 625, 169, 643, 105, + 170, 607, 520, 932, 727, 476, 693, 425, 174, 647, + 73, 122, 335, 530, 442, 853, 695, 249, 445, 515, + 909, 545, 703, 919, 874, 474, 882, 500, 594, 612, + 641, 801, 220, 162, 819, 984, 589, 513, 495, 799, + 161, 604, 958, 533, 221, 400, 386, 867, 600, 782, + 382, 596, 414, 171, 516, 375, 682, 485, 911, 276, + 98, 553, 163, 354, 666, 933, 424, 341, 533, 870, + 227, 730, 475, 186, 263, 647, 537, 686, 600, 224, + 469, 68, 770, 919, 190, 373, 294, 822, 808, 206, + 184, 943, 795, 384, 383, 461, 404, 758, 839, 887, + 715, 67, 618, 276, 204, 918, 873, 777, 604, 560, + 951, 160, 578, 722, 79, 804, 96, 409, 713, 940, + 652, 934, 970, 447, 318, 353, 859, 672, 112, 785, + 645, 863, 803, 350, 139, 93, 354, 99, 820, 908, + 609, 772, 154, 274, 580, 184, 79, 626, 630, 742, + 653, 282, 762, 623, 680, 81, 927, 626, 789, 125, + 411, 521, 938, 300, 821, 78, 343, 175, 128, 250, + 170, 774, 972, 275, 999, 639, 495, 78, 352, 126, + 857, 956, 358, 619, 580, 124, 737, 594, 701, 612, + 669, 112, 134, 694, 363, 992, 809, 743, 168, 974, + 944, 375, 748, 52, 600, 747, 642, 182, 862, 81, + 344, 805, 988, 739, 511, 655, 814, 334, 249, 515, + 897, 955, 664, 981, 649, 113, 974, 459, 893, 228, + 433, 837, 553, 268, 926, 240, 102, 654, 459, 51, + 686, 754, 806, 760, 493, 403, 415, 394, 687, 700, + 946, 670, 656, 610, 738, 392, 760, 799, 887, 653, + 978, 321, 576, 617, 626, 502, 894, 679, 243, 440, + 680, 879, 194, 572, 640, 724, 926, 56, 204, 700, + 707, 151, 457, 449, 797, 195, 791, 558, 945, 679, + 297, 59, 87, 824, 713, 663, 412, 693, 342, 606, + 134, 108, 571, 364, 631, 212, 174, 643, 304, 329, + 343, 97, 430, 751, 497, 314, 983, 374, 822, 928, + 140, 206, 73, 263, 980, 736, 876, 478, 430, 305, + 170, 514, 364, 692, 829, 82, 855, 953, 676, 246, + 369, 970, 294, 750, 807, 827, 150, 790, 288, 923, + 804, 378, 215, 828, 592, 281, 565, 555, 710, 82, + 896, 831, 547, 261, 524, 462, 293, 465, 502, 56, + 661, 821, 976, 991, 658, 869, 905, 758, 745, 193, + 768, 550, 608, 933, 378, 286, 215, 979, 792, 961, + 61, 688, 793, 644, 986, 403, 106, 366, 905, 644, + 372, 567, 466, 434, 645, 210, 389, 550, 919, 135, + 780, 773, 635, 389, 707, 100, 626, 958, 165, 504, + 920, 176, 193, 713, 857, 265, 203, 50, 668, 108, + 645, 990, 626, 197, 510, 357, 358, 850, 858, 364, + 936, 638 +}; + + +/*-------------------------------------------------------------*/ +/*--- end randtable.c ---*/ +/*-------------------------------------------------------------*/ diff --git a/Sources/CBrotliDec/LICENSE b/Sources/CBrotliDec/LICENSE new file mode 100644 index 0000000..33b7cdd --- /dev/null +++ b/Sources/CBrotliDec/LICENSE @@ -0,0 +1,19 @@ +Copyright (c) 2009, 2010, 2013-2016 by the Brotli Authors. + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in +all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +THE SOFTWARE. diff --git a/Sources/CBrotliDec/README.md b/Sources/CBrotliDec/README.md new file mode 100644 index 0000000..a6ba698 --- /dev/null +++ b/Sources/CBrotliDec/README.md @@ -0,0 +1,40 @@ +# CBrotliDec — vendored Brotli decoder + +Google's reference Brotli implementation (RFC 7932), **decoder only**, vendored +unmodified so PatchSDK can inflate `.wasm.br` modules on every platform +(Apple and Android) without Apple's `Compression` framework. + +| Field | Value | +| --- | --- | +| Upstream | https://github.com/google/brotli | +| Version | v1.2.0 | +| Commit | 028fb5a23661f123017c060daa546b55cf4bde29 | +| License | MIT (see `LICENSE`) | + +## What was copied + +| Upstream path | Here | +| --- | --- | +| `c/common/*.c`, `c/common/*.h` | `common/` | +| `c/dec/*.c`, `c/dec/*.h` | `dec/` | +| `c/include/brotli/{decode,port,shared_dictionary,types}.h` | `include/brotli/` | +| `LICENSE` | `LICENSE` | + +Not copied: the encoder (`c/enc`, `encode.h`), tools, fuzzers, and the +`dictionary.bin*` blobs (the dictionary is compiled in from `dictionary_inc.h`). + +## Updating + +```sh +git clone --depth 1 --branch https://github.com/google/brotli.git /tmp/brotli +D=Sources/CBrotliDec +rm -rf $D/common $D/dec $D/include +mkdir -p $D/common $D/dec $D/include/brotli +cp /tmp/brotli/c/common/*.c /tmp/brotli/c/common/*.h $D/common/ +cp /tmp/brotli/c/dec/*.c /tmp/brotli/c/dec/*.h $D/dec/ +cp /tmp/brotli/c/include/brotli/{decode,port,shared_dictionary,types}.h $D/include/brotli/ +cp /tmp/brotli/LICENSE $D/LICENSE +``` + +Then update the version and commit in the table above. Do not edit the +vendored sources by hand. diff --git a/Sources/CBrotliDec/common/constants.c b/Sources/CBrotliDec/common/constants.c new file mode 100644 index 0000000..ef5a2e2 --- /dev/null +++ b/Sources/CBrotliDec/common/constants.c @@ -0,0 +1,15 @@ +/* Copyright 2013 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +#include "constants.h" + +const BROTLI_MODEL("small") +BrotliPrefixCodeRange _kBrotliPrefixCodeRanges[BROTLI_NUM_BLOCK_LEN_SYMBOLS] = { + {1, 2}, {5, 2}, {9, 2}, {13, 2}, {17, 3}, {25, 3}, + {33, 3}, {41, 3}, {49, 4}, {65, 4}, {81, 4}, {97, 4}, + {113, 5}, {145, 5}, {177, 5}, {209, 5}, {241, 6}, {305, 6}, + {369, 7}, {497, 8}, {753, 9}, {1265, 10}, {2289, 11}, {4337, 12}, + {8433, 13}, {16625, 24}}; diff --git a/Sources/CBrotliDec/common/constants.h b/Sources/CBrotliDec/common/constants.h new file mode 100644 index 0000000..85e9802 --- /dev/null +++ b/Sources/CBrotliDec/common/constants.h @@ -0,0 +1,198 @@ +/* Copyright 2016 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +/** + * @file + * Common constants used in decoder and encoder API. + */ + +#ifndef BROTLI_COMMON_CONSTANTS_H_ +#define BROTLI_COMMON_CONSTANTS_H_ + +#include "platform.h" + +/* Specification: 7.3. Encoding of the context map */ +#define BROTLI_CONTEXT_MAP_MAX_RLE 16 + +/* Specification: 2. Compressed representation overview */ +#define BROTLI_MAX_NUMBER_OF_BLOCK_TYPES 256 + +/* Specification: 3.3. Alphabet sizes: insert-and-copy length */ +#define BROTLI_NUM_LITERAL_SYMBOLS 256 +#define BROTLI_NUM_COMMAND_SYMBOLS 704 +#define BROTLI_NUM_BLOCK_LEN_SYMBOLS 26 +#define BROTLI_MAX_CONTEXT_MAP_SYMBOLS (BROTLI_MAX_NUMBER_OF_BLOCK_TYPES + \ + BROTLI_CONTEXT_MAP_MAX_RLE) +#define BROTLI_MAX_BLOCK_TYPE_SYMBOLS (BROTLI_MAX_NUMBER_OF_BLOCK_TYPES + 2) + +/* Specification: 3.5. Complex prefix codes */ +#define BROTLI_REPEAT_PREVIOUS_CODE_LENGTH 16 +#define BROTLI_REPEAT_ZERO_CODE_LENGTH 17 +#define BROTLI_CODE_LENGTH_CODES (BROTLI_REPEAT_ZERO_CODE_LENGTH + 1) +/* "code length of 8 is repeated" */ +#define BROTLI_INITIAL_REPEATED_CODE_LENGTH 8 + +/* "Large Window Brotli" */ + +/** + * The theoretical maximum number of distance bits specified for large window + * brotli, for 64-bit encoders and decoders. Even when in practice 32-bit + * encoders and decoders only support up to 30 max distance bits, the value is + * set to 62 because it affects the large window brotli file format. + * Specifically, it affects the encoding of simple huffman tree for distances, + * see Specification RFC 7932 chapter 3.4. + */ +#define BROTLI_LARGE_MAX_DISTANCE_BITS 62U +#define BROTLI_LARGE_MIN_WBITS 10 +/** + * The maximum supported large brotli window bits by the encoder and decoder. + * Large window brotli allows up to 62 bits, however the current encoder and + * decoder, designed for 32-bit integers, only support up to 30 bits maximum. + */ +#define BROTLI_LARGE_MAX_WBITS 30 + +/* Specification: 4. Encoding of distances */ +#define BROTLI_NUM_DISTANCE_SHORT_CODES 16 +/** + * Maximal number of "postfix" bits. + * + * Number of "postfix" bits is stored as 2 bits in meta-block header. + */ +#define BROTLI_MAX_NPOSTFIX 3 +#define BROTLI_MAX_NDIRECT 120 +#define BROTLI_MAX_DISTANCE_BITS 24U +#define BROTLI_DISTANCE_ALPHABET_SIZE(NPOSTFIX, NDIRECT, MAXNBITS) ( \ + BROTLI_NUM_DISTANCE_SHORT_CODES + (NDIRECT) + \ + ((MAXNBITS) << ((NPOSTFIX) + 1))) +/* BROTLI_NUM_DISTANCE_SYMBOLS == 1128 */ +#define BROTLI_NUM_DISTANCE_SYMBOLS \ + BROTLI_DISTANCE_ALPHABET_SIZE( \ + BROTLI_MAX_NDIRECT, BROTLI_MAX_NPOSTFIX, BROTLI_LARGE_MAX_DISTANCE_BITS) + +/* ((1 << 26) - 4) is the maximal distance that can be expressed in RFC 7932 + brotli stream using NPOSTFIX = 0 and NDIRECT = 0. With other NPOSTFIX and + NDIRECT values distances up to ((1 << 29) + 88) could be expressed. */ +#define BROTLI_MAX_DISTANCE 0x3FFFFFC + +/* ((1 << 31) - 4) is the safe distance limit. Using this number as a limit + allows safe distance calculation without overflows, given the distance + alphabet size is limited to corresponding size + (see kLargeWindowDistanceCodeLimits). */ +#define BROTLI_MAX_ALLOWED_DISTANCE 0x7FFFFFFC + + +/* Specification: 4. Encoding of Literal Insertion Lengths and Copy Lengths */ +#define BROTLI_NUM_INS_COPY_CODES 24 + +/* 7.1. Context modes and context ID lookup for literals */ +/* "context IDs for literals are in the range of 0..63" */ +#define BROTLI_LITERAL_CONTEXT_BITS 6 + +/* 7.2. Context ID for distances */ +#define BROTLI_DISTANCE_CONTEXT_BITS 2 + +/* 9.1. Format of the Stream Header */ +/* Number of slack bytes for window size. Don't confuse + with BROTLI_NUM_DISTANCE_SHORT_CODES. */ +#define BROTLI_WINDOW_GAP 16 +#define BROTLI_MAX_BACKWARD_LIMIT(W) (((size_t)1 << (W)) - BROTLI_WINDOW_GAP) + +typedef struct BrotliDistanceCodeLimit { + uint32_t max_alphabet_size; + uint32_t max_distance; +} BrotliDistanceCodeLimit; + +/* This function calculates maximal size of distance alphabet, such that the + distances greater than the given values can not be represented. + + This limits are designed to support fast and safe 32-bit decoders. + "32-bit" means that signed integer values up to ((1 << 31) - 1) could be + safely expressed. + + Brotli distance alphabet symbols do not represent consecutive distance + ranges. Each distance alphabet symbol (excluding direct distances and short + codes), represent interleaved (for NPOSTFIX > 0) range of distances. + A "group" of consecutive (1 << NPOSTFIX) symbols represent non-interleaved + range. Two consecutive groups require the same amount of "extra bits". + + It is important that distance alphabet represents complete "groups". + To avoid complex logic on encoder side about interleaved ranges + it was decided to restrict both sides to complete distance code "groups". + */ +BROTLI_UNUSED_FUNCTION BrotliDistanceCodeLimit BrotliCalculateDistanceCodeLimit( + uint32_t max_distance, uint32_t npostfix, uint32_t ndirect) { + BrotliDistanceCodeLimit result; + /* Marking this function as unused, because not all files + including "constants.h" use it -> compiler warns about that. */ + BROTLI_UNUSED(&BrotliCalculateDistanceCodeLimit); + if (max_distance <= ndirect) { + /* This case never happens / exists only for the sake of completeness. */ + result.max_alphabet_size = max_distance + BROTLI_NUM_DISTANCE_SHORT_CODES; + result.max_distance = max_distance; + return result; + } else { + /* The first prohibited value. */ + uint32_t forbidden_distance = max_distance + 1; + /* Subtract "directly" encoded region. */ + uint32_t offset = forbidden_distance - ndirect - 1; + uint32_t ndistbits = 0; + uint32_t tmp; + uint32_t half; + uint32_t group; + /* Postfix for the last dcode in the group. */ + uint32_t postfix = (1u << npostfix) - 1; + uint32_t extra; + uint32_t start; + /* Remove postfix and "head-start". */ + offset = (offset >> npostfix) + 4; + /* Calculate the number of distance bits. */ + tmp = offset / 2; + /* Poor-man's log2floor, to avoid extra dependencies. */ + while (tmp != 0) {ndistbits++; tmp = tmp >> 1;} + /* One bit is covered with subrange addressing ("half"). */ + ndistbits--; + /* Find subrange. */ + half = (offset >> ndistbits) & 1; + /* Calculate the "group" part of dcode. */ + group = ((ndistbits - 1) << 1) | half; + /* Calculated "group" covers the prohibited distance value. */ + if (group == 0) { + /* This case is added for correctness; does not occur for limit > 128. */ + result.max_alphabet_size = ndirect + BROTLI_NUM_DISTANCE_SHORT_CODES; + result.max_distance = ndirect; + return result; + } + /* Decrement "group", so it is the last permitted "group". */ + group--; + /* After group was decremented, ndistbits and half must be recalculated. */ + ndistbits = (group >> 1) + 1; + /* The last available distance in the subrange has all extra bits set. */ + extra = (1u << ndistbits) - 1; + /* Calculate region start. NB: ndistbits >= 1. */ + start = (1u << (ndistbits + 1)) - 4; + /* Move to subregion. */ + start += (group & 1) << ndistbits; + /* Calculate the alphabet size. */ + result.max_alphabet_size = ((group << npostfix) | postfix) + ndirect + + BROTLI_NUM_DISTANCE_SHORT_CODES + 1; + /* Calculate the maximal distance representable by alphabet. */ + result.max_distance = ((start + extra) << npostfix) + postfix + ndirect + 1; + return result; + } +} + +/* Represents the range of values belonging to a prefix code: + [offset, offset + 2^nbits) */ +typedef struct { + uint16_t offset; + uint8_t nbits; +} BrotliPrefixCodeRange; + +/* "Soft-private", it is exported, but not "advertised" as API. */ +BROTLI_COMMON_API extern const BROTLI_MODEL("small") +BrotliPrefixCodeRange _kBrotliPrefixCodeRanges[BROTLI_NUM_BLOCK_LEN_SYMBOLS]; + +#endif /* BROTLI_COMMON_CONSTANTS_H_ */ diff --git a/Sources/CBrotliDec/common/context.c b/Sources/CBrotliDec/common/context.c new file mode 100644 index 0000000..d3c910c --- /dev/null +++ b/Sources/CBrotliDec/common/context.c @@ -0,0 +1,156 @@ +#include "context.h" + +#include "platform.h" + +/* Common context lookup table for all context modes. */ +const BROTLI_MODEL("small") uint8_t _kBrotliContextLookupTable[2048] = { + /* CONTEXT_LSB6, last byte. */ + 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, + 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, + 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, + 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, + 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, + 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, + 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, + 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, + 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, + 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, + 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, + 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, + 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, + 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, + 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, + 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, + + /* CONTEXT_LSB6, second last byte, */ + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + + /* CONTEXT_MSB6, last byte. */ + 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, + 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 6, 6, 7, 7, 7, 7, + 8, 8, 8, 8, 9, 9, 9, 9, 10, 10, 10, 10, 11, 11, 11, 11, + 12, 12, 12, 12, 13, 13, 13, 13, 14, 14, 14, 14, 15, 15, 15, 15, + 16, 16, 16, 16, 17, 17, 17, 17, 18, 18, 18, 18, 19, 19, 19, 19, + 20, 20, 20, 20, 21, 21, 21, 21, 22, 22, 22, 22, 23, 23, 23, 23, + 24, 24, 24, 24, 25, 25, 25, 25, 26, 26, 26, 26, 27, 27, 27, 27, + 28, 28, 28, 28, 29, 29, 29, 29, 30, 30, 30, 30, 31, 31, 31, 31, + 32, 32, 32, 32, 33, 33, 33, 33, 34, 34, 34, 34, 35, 35, 35, 35, + 36, 36, 36, 36, 37, 37, 37, 37, 38, 38, 38, 38, 39, 39, 39, 39, + 40, 40, 40, 40, 41, 41, 41, 41, 42, 42, 42, 42, 43, 43, 43, 43, + 44, 44, 44, 44, 45, 45, 45, 45, 46, 46, 46, 46, 47, 47, 47, 47, + 48, 48, 48, 48, 49, 49, 49, 49, 50, 50, 50, 50, 51, 51, 51, 51, + 52, 52, 52, 52, 53, 53, 53, 53, 54, 54, 54, 54, 55, 55, 55, 55, + 56, 56, 56, 56, 57, 57, 57, 57, 58, 58, 58, 58, 59, 59, 59, 59, + 60, 60, 60, 60, 61, 61, 61, 61, 62, 62, 62, 62, 63, 63, 63, 63, + + /* CONTEXT_MSB6, second last byte, */ + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + + /* CONTEXT_UTF8, last byte. */ + /* ASCII range. */ + 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 4, 0, 0, 4, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 8, 12, 16, 12, 12, 20, 12, 16, 24, 28, 12, 12, 32, 12, 36, 12, + 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 32, 32, 24, 40, 28, 12, + 12, 48, 52, 52, 52, 48, 52, 52, 52, 48, 52, 52, 52, 52, 52, 48, + 52, 52, 52, 52, 52, 48, 52, 52, 52, 52, 52, 24, 12, 28, 12, 12, + 12, 56, 60, 60, 60, 56, 60, 60, 60, 56, 60, 60, 60, 60, 60, 56, + 60, 60, 60, 60, 60, 56, 60, 60, 60, 60, 60, 24, 12, 28, 12, 0, + /* UTF8 continuation byte range. */ + 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, + 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, + 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, + 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, + /* UTF8 lead byte range. */ + 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, + 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, + 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, + 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, 2, 3, + + /* CONTEXT_UTF8 second last byte. */ + /* ASCII range. */ + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, + 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, + 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, + 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, + 1, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, + 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 0, + /* UTF8 continuation byte range. */ + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + /* UTF8 lead byte range. */ + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, + 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, + + /* CONTEXT_SIGNED, last byte, same as the above values shifted by 3 bits. */ + 0, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, + 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, + 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, + 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, + 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, + 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, + 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, + 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, + 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, + 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, + 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, + 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, + 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, + 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, + 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, + 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 56, + + /* CONTEXT_SIGNED, second last byte. */ + 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, + 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, + 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, + 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, + 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, + 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, + 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, + 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, + 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, + 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, + 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, + 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, + 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, + 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, + 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, + 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 7, +}; diff --git a/Sources/CBrotliDec/common/context.h b/Sources/CBrotliDec/common/context.h new file mode 100644 index 0000000..45b57d8 --- /dev/null +++ b/Sources/CBrotliDec/common/context.h @@ -0,0 +1,112 @@ +/* Copyright 2013 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +/* Lookup table to map the previous two bytes to a context id. + + There are four different context modeling modes defined here: + CONTEXT_LSB6: context id is the least significant 6 bits of the last byte, + CONTEXT_MSB6: context id is the most significant 6 bits of the last byte, + CONTEXT_UTF8: second-order context model tuned for UTF8-encoded text, + CONTEXT_SIGNED: second-order context model tuned for signed integers. + + If |p1| and |p2| are the previous two bytes, and |mode| is current context + mode, we calculate the context as: + + context = ContextLut(mode)[p1] | ContextLut(mode)[p2 + 256]. + + For CONTEXT_UTF8 mode, if the previous two bytes are ASCII characters + (i.e. < 128), this will be equivalent to + + context = 4 * context1(p1) + context2(p2), + + where context1 is based on the previous byte in the following way: + + 0 : non-ASCII control + 1 : \t, \n, \r + 2 : space + 3 : other punctuation + 4 : " ' + 5 : % + 6 : ( < [ { + 7 : ) > ] } + 8 : , ; : + 9 : . + 10 : = + 11 : number + 12 : upper-case vowel + 13 : upper-case consonant + 14 : lower-case vowel + 15 : lower-case consonant + + and context2 is based on the second last byte: + + 0 : control, space + 1 : punctuation + 2 : upper-case letter, number + 3 : lower-case letter + + If the last byte is ASCII, and the second last byte is not (in a valid UTF8 + stream it will be a continuation byte, value between 128 and 191), the + context is the same as if the second last byte was an ASCII control or space. + + If the last byte is a UTF8 lead byte (value >= 192), then the next byte will + be a continuation byte and the context id is 2 or 3 depending on the LSB of + the last byte and to a lesser extent on the second last byte if it is ASCII. + + If the last byte is a UTF8 continuation byte, the second last byte can be: + - continuation byte: the next byte is probably ASCII or lead byte (assuming + 4-byte UTF8 characters are rare) and the context id is 0 or 1. + - lead byte (192 - 207): next byte is ASCII or lead byte, context is 0 or 1 + - lead byte (208 - 255): next byte is continuation byte, context is 2 or 3 + + The possible value combinations of the previous two bytes, the range of + context ids and the type of the next byte is summarized in the table below: + + |--------\-----------------------------------------------------------------| + | \ Last byte | + | Second \---------------------------------------------------------------| + | last byte \ ASCII | cont. byte | lead byte | + | \ (0-127) | (128-191) | (192-) | + |=============|===================|=====================|==================| + | ASCII | next: ASCII/lead | not valid | next: cont. | + | (0-127) | context: 4 - 63 | | context: 2 - 3 | + |-------------|-------------------|---------------------|------------------| + | cont. byte | next: ASCII/lead | next: ASCII/lead | next: cont. | + | (128-191) | context: 4 - 63 | context: 0 - 1 | context: 2 - 3 | + |-------------|-------------------|---------------------|------------------| + | lead byte | not valid | next: ASCII/lead | not valid | + | (192-207) | | context: 0 - 1 | | + |-------------|-------------------|---------------------|------------------| + | lead byte | not valid | next: cont. | not valid | + | (208-) | | context: 2 - 3 | | + |-------------|-------------------|---------------------|------------------| +*/ + +#ifndef BROTLI_COMMON_CONTEXT_H_ +#define BROTLI_COMMON_CONTEXT_H_ + +#include "platform.h" + +typedef enum ContextType { + CONTEXT_LSB6 = 0, + CONTEXT_MSB6 = 1, + CONTEXT_UTF8 = 2, + CONTEXT_SIGNED = 3 +} ContextType; + +/* "Soft-private", it is exported, but not "advertised" as API. */ +/* Common context lookup table for all context modes. */ +BROTLI_COMMON_API extern const uint8_t _kBrotliContextLookupTable[2048]; + +typedef const uint8_t* ContextLut; + +/* typeof(MODE) == ContextType; returns ContextLut */ +#define BROTLI_CONTEXT_LUT(MODE) (&_kBrotliContextLookupTable[(MODE) << 9]) + +/* typeof(LUT) == ContextLut */ +#define BROTLI_CONTEXT(P1, P2, LUT) ((LUT)[P1] | ((LUT) + 256)[P2]) + +#endif /* BROTLI_COMMON_CONTEXT_H_ */ diff --git a/Sources/CBrotliDec/common/dictionary.c b/Sources/CBrotliDec/common/dictionary.c new file mode 100644 index 0000000..ef43af9 --- /dev/null +++ b/Sources/CBrotliDec/common/dictionary.c @@ -0,0 +1,64 @@ +/* Copyright 2013 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +#include "dictionary.h" +#include "platform.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +#if !defined(BROTLI_EXTERNAL_DICTIONARY_DATA) +/* Embed kBrotliDictionaryData */ +#include "dictionary_inc.h" +static const BROTLI_MODEL("small") BrotliDictionary kBrotliDictionary = { +#else +static BROTLI_MODEL("small") BrotliDictionary kBrotliDictionary = { +#endif + /* size_bits_by_length */ + { + 0, 0, 0, 0, 10, 10, 11, 11, + 10, 10, 10, 10, 10, 9, 9, 8, + 7, 7, 8, 7, 7, 6, 6, 5, + 5, 0, 0, 0, 0, 0, 0, 0 + }, + + /* offsets_by_length */ + { + 0, 0, 0, 0, 0, 4096, 9216, 21504, + 35840, 44032, 53248, 63488, 74752, 87040, 93696, 100864, + 104704, 106752, 108928, 113536, 115968, 118528, 119872, 121280, + 122016, 122784, 122784, 122784, 122784, 122784, 122784, 122784 + }, + + /* data_size == sizeof(kBrotliDictionaryData) */ + 122784, + + /* data */ +#if defined(BROTLI_EXTERNAL_DICTIONARY_DATA) + NULL +#else + kBrotliDictionaryData +#endif +}; + +const BrotliDictionary* BrotliGetDictionary(void) { + return &kBrotliDictionary; +} + +void BrotliSetDictionaryData(const uint8_t* data) { +#if defined(BROTLI_EXTERNAL_DICTIONARY_DATA) + if (!!data && !kBrotliDictionary.data) { + kBrotliDictionary.data = data; + } +#else + BROTLI_UNUSED(data); // Appease -Werror=unused-parameter +#endif +} + +#if defined(__cplusplus) || defined(c_plusplus) +} /* extern "C" */ +#endif diff --git a/Sources/CBrotliDec/common/dictionary.h b/Sources/CBrotliDec/common/dictionary.h new file mode 100644 index 0000000..ed683b0 --- /dev/null +++ b/Sources/CBrotliDec/common/dictionary.h @@ -0,0 +1,63 @@ +/* Copyright 2013 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +/* Collection of static dictionary words. */ + +#ifndef BROTLI_COMMON_DICTIONARY_H_ +#define BROTLI_COMMON_DICTIONARY_H_ + +#include "platform.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +typedef struct BrotliDictionary { + /** + * Number of bits to encode index of dictionary word in a bucket. + * + * Specification: Appendix A. Static Dictionary Data + * + * Words in a dictionary are bucketed by length. + * @c 0 means that there are no words of a given length. + * Dictionary consists of words with length of [4..24] bytes. + * Values at [0..3] and [25..31] indices should not be addressed. + */ + uint8_t size_bits_by_length[32]; + + /* assert(offset[i + 1] == offset[i] + (bits[i] ? (i << bits[i]) : 0)) */ + uint32_t offsets_by_length[32]; + + /* assert(data_size == offsets_by_length[31]) */ + size_t data_size; + + /* Data array is not bound, and should obey to size_bits_by_length values. + Specified size matches default (RFC 7932) dictionary. Its size is + defined by data_size */ + const uint8_t* data; +} BrotliDictionary; + +BROTLI_COMMON_API const BrotliDictionary* BrotliGetDictionary(void); + +/** + * Sets dictionary data. + * + * When dictionary data is already set / present, this method is no-op. + * + * Dictionary data MUST be provided before BrotliGetDictionary is invoked. + * This method is used ONLY in multi-client environment (e.g. C + Java), + * to reduce storage by sharing single dictionary between implementations. + */ +BROTLI_COMMON_API void BrotliSetDictionaryData(const uint8_t* data); + +#define BROTLI_MIN_DICTIONARY_WORD_LENGTH 4 +#define BROTLI_MAX_DICTIONARY_WORD_LENGTH 24 + +#if defined(__cplusplus) || defined(c_plusplus) +} /* extern "C" */ +#endif + +#endif /* BROTLI_COMMON_DICTIONARY_H_ */ diff --git a/Sources/CBrotliDec/common/dictionary_inc.h b/Sources/CBrotliDec/common/dictionary_inc.h new file mode 100644 index 0000000..f40a93e --- /dev/null +++ b/Sources/CBrotliDec/common/dictionary_inc.h @@ -0,0 +1,5847 @@ +static const BROTLI_MODEL("small") uint8_t kBrotliDictionaryData[] = { +116,105,109,101,100,111,119,110,108,105,102,101,108,101,102,116,98,97,99,107,99, +111,100,101,100,97,116,97,115,104,111,119,111,110,108,121,115,105,116,101,99,105 +,116,121,111,112,101,110,106,117,115,116,108,105,107,101,102,114,101,101,119,111 +,114,107,116,101,120,116,121,101,97,114,111,118,101,114,98,111,100,121,108,111, +118,101,102,111,114,109,98,111,111,107,112,108,97,121,108,105,118,101,108,105, +110,101,104,101,108,112,104,111,109,101,115,105,100,101,109,111,114,101,119,111, +114,100,108,111,110,103,116,104,101,109,118,105,101,119,102,105,110,100,112,97, +103,101,100,97,121,115,102,117,108,108,104,101,97,100,116,101,114,109,101,97,99, +104,97,114,101,97,102,114,111,109,116,114,117,101,109,97,114,107,97,98,108,101, +117,112,111,110,104,105,103,104,100,97,116,101,108,97,110,100,110,101,119,115, +101,118,101,110,110,101,120,116,99,97,115,101,98,111,116,104,112,111,115,116,117 +,115,101,100,109,97,100,101,104,97,110,100,104,101,114,101,119,104,97,116,110,97 +,109,101,76,105,110,107,98,108,111,103,115,105,122,101,98,97,115,101,104,101,108 +,100,109,97,107,101,109,97,105,110,117,115,101,114,39,41,32,43,104,111,108,100, +101,110,100,115,119,105,116,104,78,101,119,115,114,101,97,100,119,101,114,101, +115,105,103,110,116,97,107,101,104,97,118,101,103,97,109,101,115,101,101,110,99, +97,108,108,112,97,116,104,119,101,108,108,112,108,117,115,109,101,110,117,102, +105,108,109,112,97,114,116,106,111,105,110,116,104,105,115,108,105,115,116,103, +111,111,100,110,101,101,100,119,97,121,115,119,101,115,116,106,111,98,115,109, +105,110,100,97,108,115,111,108,111,103,111,114,105,99,104,117,115,101,115,108,97 +,115,116,116,101,97,109,97,114,109,121,102,111,111,100,107,105,110,103,119,105, +108,108,101,97,115,116,119,97,114,100,98,101,115,116,102,105,114,101,80,97,103, +101,107,110,111,119,97,119,97,121,46,112,110,103,109,111,118,101,116,104,97,110, 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+,164,181,224,164,190,224,164,136,224,164,184,224,164,149,224,165,141,224,164,176 +,224,164,191,224,164,175,224,164,164,224,164,190 +}; diff --git a/Sources/CBrotliDec/common/platform.c b/Sources/CBrotliDec/common/platform.c new file mode 100644 index 0000000..1e047ce --- /dev/null +++ b/Sources/CBrotliDec/common/platform.c @@ -0,0 +1,19 @@ +/* Copyright 2016 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +#include "platform.h" + +/* Default brotli_alloc_func */ +void* BrotliDefaultAllocFunc(void* opaque, size_t size) { + BROTLI_UNUSED(opaque); + return malloc(size); +} + +/* Default brotli_free_func */ +void BrotliDefaultFreeFunc(void* opaque, void* address) { + BROTLI_UNUSED(opaque); + free(address); +} diff --git a/Sources/CBrotliDec/common/platform.h b/Sources/CBrotliDec/common/platform.h new file mode 100644 index 0000000..b59f9b8 --- /dev/null +++ b/Sources/CBrotliDec/common/platform.h @@ -0,0 +1,680 @@ +/* Copyright 2016 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +/* Macros for compiler / platform specific features and build options. + + Build options are: + * BROTLI_BUILD_32_BIT disables 64-bit optimizations + * BROTLI_BUILD_64_BIT forces to use 64-bit optimizations + * BROTLI_BUILD_BIG_ENDIAN forces to use big-endian optimizations + * BROTLI_BUILD_ENDIAN_NEUTRAL disables endian-aware optimizations + * BROTLI_BUILD_LITTLE_ENDIAN forces to use little-endian optimizations + * BROTLI_BUILD_NO_RBIT disables "rbit" optimization for ARM CPUs + * BROTLI_BUILD_NO_UNALIGNED_READ_FAST forces off the fast-unaligned-read + optimizations (mainly for testing purposes) + * BROTLI_DEBUG dumps file name and line number when decoder detects stream + or memory error + * BROTLI_ENABLE_LOG enables asserts and dumps various state information + * BROTLI_ENABLE_DUMP overrides default "dump" behaviour +*/ + +#ifndef BROTLI_COMMON_PLATFORM_H_ +#define BROTLI_COMMON_PLATFORM_H_ + +#include /* IWYU pragma: export memcmp, memcpy, memset */ +#include /* IWYU pragma: export exit, free, malloc */ +#include /* should include endian.h for us */ + +#include /* IWYU pragma: export */ +#include /* IWYU pragma: export */ + +#if BROTLI_MSVC_VERSION_CHECK(18, 0, 0) +#include +#endif + +#if defined(BROTLI_ENABLE_LOG) || defined(BROTLI_DEBUG) +#include +#include +#endif + +/* The following macros were borrowed from https://github.com/nemequ/hedley + * with permission of original author - Evan Nemerson */ + +/* >>> >>> >>> hedley macros */ + +/* Define "BROTLI_PREDICT_TRUE" and "BROTLI_PREDICT_FALSE" macros for capable + compilers. + +To apply compiler hint, enclose the branching condition into macros, like this: + + if (BROTLI_PREDICT_TRUE(zero == 0)) { + // main execution path + } else { + // compiler should place this code outside of main execution path + } + +OR: + + if (BROTLI_PREDICT_FALSE(something_rare_or_unexpected_happens)) { + // compiler should place this code outside of main execution path + } + +*/ +#if BROTLI_GNUC_HAS_BUILTIN(__builtin_expect, 3, 0, 0) || \ + BROTLI_INTEL_VERSION_CHECK(16, 0, 0) || \ + BROTLI_SUNPRO_VERSION_CHECK(5, 15, 0) || \ + BROTLI_ARM_VERSION_CHECK(4, 1, 0) || \ + BROTLI_IBM_VERSION_CHECK(10, 1, 0) || \ + BROTLI_TI_VERSION_CHECK(7, 3, 0) || \ + BROTLI_TINYC_VERSION_CHECK(0, 9, 27) +#define BROTLI_PREDICT_TRUE(x) (__builtin_expect(!!(x), 1)) +#define BROTLI_PREDICT_FALSE(x) (__builtin_expect(x, 0)) +#else +#define BROTLI_PREDICT_FALSE(x) (x) +#define BROTLI_PREDICT_TRUE(x) (x) +#endif + +#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) && \ + !defined(__cplusplus) +#define BROTLI_RESTRICT restrict +#elif BROTLI_GNUC_VERSION_CHECK(3, 1, 0) || \ + BROTLI_MSVC_VERSION_CHECK(14, 0, 0) || \ + BROTLI_INTEL_VERSION_CHECK(16, 0, 0) || \ + BROTLI_ARM_VERSION_CHECK(4, 1, 0) || \ + BROTLI_IBM_VERSION_CHECK(10, 1, 0) || \ + BROTLI_PGI_VERSION_CHECK(17, 10, 0) || \ + BROTLI_TI_VERSION_CHECK(8, 0, 0) || \ + BROTLI_IAR_VERSION_CHECK(8, 0, 0) || \ + (BROTLI_SUNPRO_VERSION_CHECK(5, 14, 0) && defined(__cplusplus)) +#define BROTLI_RESTRICT __restrict +#elif BROTLI_SUNPRO_VERSION_CHECK(5, 3, 0) && !defined(__cplusplus) +#define BROTLI_RESTRICT _Restrict +#else +#define BROTLI_RESTRICT +#endif + +#if (defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)) || \ + (defined(__cplusplus) && (__cplusplus >= 199711L)) +#define BROTLI_MAYBE_INLINE inline +#elif defined(__GNUC_STDC_INLINE__) || defined(__GNUC_GNU_INLINE__) || \ + BROTLI_ARM_VERSION_CHECK(6, 2, 0) +#define BROTLI_MAYBE_INLINE __inline__ +#elif BROTLI_MSVC_VERSION_CHECK(12, 0, 0) || \ + BROTLI_ARM_VERSION_CHECK(4, 1, 0) || BROTLI_TI_VERSION_CHECK(8, 0, 0) +#define BROTLI_MAYBE_INLINE __inline +#else +#define BROTLI_MAYBE_INLINE +#endif + +#if BROTLI_GNUC_HAS_ATTRIBUTE(always_inline, 4, 0, 0) || \ + BROTLI_INTEL_VERSION_CHECK(16, 0, 0) || \ + BROTLI_SUNPRO_VERSION_CHECK(5, 11, 0) || \ + BROTLI_ARM_VERSION_CHECK(4, 1, 0) || \ + BROTLI_IBM_VERSION_CHECK(10, 1, 0) || \ + BROTLI_TI_VERSION_CHECK(8, 0, 0) || \ + (BROTLI_TI_VERSION_CHECK(7, 3, 0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) +#define BROTLI_INLINE BROTLI_MAYBE_INLINE __attribute__((__always_inline__)) +#elif BROTLI_MSVC_VERSION_CHECK(12, 0, 0) +#define BROTLI_INLINE BROTLI_MAYBE_INLINE __forceinline +#elif BROTLI_TI_VERSION_CHECK(7, 0, 0) && defined(__cplusplus) +#define BROTLI_INLINE BROTLI_MAYBE_INLINE _Pragma("FUNC_ALWAYS_INLINE;") +#elif BROTLI_IAR_VERSION_CHECK(8, 0, 0) +#define BROTLI_INLINE BROTLI_MAYBE_INLINE _Pragma("inline=forced") +#else +#define BROTLI_INLINE BROTLI_MAYBE_INLINE +#endif + +#if BROTLI_GNUC_HAS_ATTRIBUTE(noinline, 4, 0, 0) || \ + BROTLI_INTEL_VERSION_CHECK(16, 0, 0) || \ + BROTLI_SUNPRO_VERSION_CHECK(5, 11, 0) || \ + BROTLI_ARM_VERSION_CHECK(4, 1, 0) || \ + BROTLI_IBM_VERSION_CHECK(10, 1, 0) || \ + BROTLI_TI_VERSION_CHECK(8, 0, 0) || \ + (BROTLI_TI_VERSION_CHECK(7, 3, 0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) +#define BROTLI_NOINLINE __attribute__((__noinline__)) +#elif BROTLI_MSVC_VERSION_CHECK(13, 10, 0) +#define BROTLI_NOINLINE __declspec(noinline) +#elif BROTLI_PGI_VERSION_CHECK(10, 2, 0) +#define BROTLI_NOINLINE _Pragma("noinline") +#elif BROTLI_TI_VERSION_CHECK(6, 0, 0) && defined(__cplusplus) +#define BROTLI_NOINLINE _Pragma("FUNC_CANNOT_INLINE;") +#elif BROTLI_IAR_VERSION_CHECK(8, 0, 0) +#define BROTLI_NOINLINE _Pragma("inline=never") +#else +#define BROTLI_NOINLINE +#endif + +/* <<< <<< <<< end of hedley macros. */ + +#if BROTLI_GNUC_HAS_ATTRIBUTE(unused, 2, 7, 0) || \ + BROTLI_INTEL_VERSION_CHECK(16, 0, 0) +#define BROTLI_UNUSED_FUNCTION static BROTLI_INLINE __attribute__ ((unused)) +#else +#define BROTLI_UNUSED_FUNCTION static BROTLI_INLINE +#endif + +#if BROTLI_GNUC_HAS_ATTRIBUTE(aligned, 2, 7, 0) +#define BROTLI_ALIGNED(N) __attribute__((aligned(N))) +#else +#define BROTLI_ALIGNED(N) +#endif + +#if (defined(__ARM_ARCH) && (__ARM_ARCH == 7)) || \ + (defined(M_ARM) && (M_ARM == 7)) +#define BROTLI_TARGET_ARMV7 +#endif /* ARMv7 */ + +#if (defined(__ARM_ARCH) && (__ARM_ARCH == 8)) || \ + defined(__aarch64__) || defined(__ARM64_ARCH_8__) +#define BROTLI_TARGET_ARMV8_ANY + +#if defined(__ARM_32BIT_STATE) +#define BROTLI_TARGET_ARMV8_32 +#elif defined(__ARM_64BIT_STATE) +#define BROTLI_TARGET_ARMV8_64 +#endif + +#endif /* ARMv8 */ + +#if defined(__ARM_NEON__) || defined(__ARM_NEON) +#define BROTLI_TARGET_NEON +#endif + +#if defined(__i386) || defined(_M_IX86) +#define BROTLI_TARGET_X86 +#endif + +#if defined(__x86_64__) || defined(_M_X64) +#define BROTLI_TARGET_X64 +#endif + +#if defined(__PPC64__) +#define BROTLI_TARGET_POWERPC64 +#endif + +#if defined(__riscv) && defined(__riscv_xlen) && __riscv_xlen == 64 +#define BROTLI_TARGET_RISCV64 +#endif + +#if defined(__loongarch_lp64) +#define BROTLI_TARGET_LOONGARCH64 +#endif + +/* This does not seem to be an indicator of z/Architecture (64-bit); neither + that allows to use unaligned loads. */ +#if defined(__s390x__) +#define BROTLI_TARGET_S390X +#endif + +#if defined(__mips64) +#define BROTLI_TARGET_MIPS64 +#endif + +#if defined(BROTLI_TARGET_X64) || defined(BROTLI_TARGET_ARMV8_64) || \ + defined(BROTLI_TARGET_POWERPC64) || defined(BROTLI_TARGET_RISCV64) || \ + defined(BROTLI_TARGET_LOONGARCH64) || defined(BROTLI_TARGET_MIPS64) +#define BROTLI_TARGET_64_BITS 1 +#else +#define BROTLI_TARGET_64_BITS 0 +#endif + +#if defined(BROTLI_BUILD_64_BIT) +#define BROTLI_64_BITS 1 +#elif defined(BROTLI_BUILD_32_BIT) +#define BROTLI_64_BITS 0 +#else +#define BROTLI_64_BITS BROTLI_TARGET_64_BITS +#endif + +#if (BROTLI_64_BITS) +#define brotli_reg_t uint64_t +#else +#define brotli_reg_t uint32_t +#endif + +#if defined(BROTLI_BUILD_BIG_ENDIAN) +#define BROTLI_BIG_ENDIAN 1 +#elif defined(BROTLI_BUILD_LITTLE_ENDIAN) +#define BROTLI_LITTLE_ENDIAN 1 +#elif defined(BROTLI_BUILD_ENDIAN_NEUTRAL) +/* Just break elif chain. */ +#elif defined(__BYTE_ORDER__) && (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) +#define BROTLI_LITTLE_ENDIAN 1 +#elif defined(_WIN32) || defined(BROTLI_TARGET_X64) +/* Win32 & x64 can currently always be assumed to be little endian */ +#define BROTLI_LITTLE_ENDIAN 1 +#elif defined(__BYTE_ORDER__) && (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) +#define BROTLI_BIG_ENDIAN 1 +/* Likely target platform is iOS / OSX. */ +#elif defined(BYTE_ORDER) && (BYTE_ORDER == LITTLE_ENDIAN) +#define BROTLI_LITTLE_ENDIAN 1 +#elif defined(BYTE_ORDER) && (BYTE_ORDER == BIG_ENDIAN) +#define BROTLI_BIG_ENDIAN 1 +#endif + +#if !defined(BROTLI_LITTLE_ENDIAN) +#define BROTLI_LITTLE_ENDIAN 0 +#endif + +#if !defined(BROTLI_BIG_ENDIAN) +#define BROTLI_BIG_ENDIAN 0 +#endif + +#if defined(BROTLI_BUILD_NO_UNALIGNED_READ_FAST) +#define BROTLI_UNALIGNED_READ_FAST (!!0) +#elif defined(BROTLI_TARGET_X86) || defined(BROTLI_TARGET_X64) || \ + defined(BROTLI_TARGET_ARMV7) || defined(BROTLI_TARGET_ARMV8_ANY) || \ + defined(BROTLI_TARGET_RISCV64) || defined(BROTLI_TARGET_LOONGARCH64) +/* These targets are known to generate efficient code for unaligned reads + * (e.g. a single instruction, not multiple 1-byte loads, shifted and or'd + * together). */ +#define BROTLI_UNALIGNED_READ_FAST (!!1) +#else +#define BROTLI_UNALIGNED_READ_FAST (!!0) +#endif + +/* Portable unaligned memory access: read / write values via memcpy. */ +#if !defined(BROTLI_USE_PACKED_FOR_UNALIGNED) +#if defined(__mips__) && (!defined(__mips_isa_rev) || __mips_isa_rev < 6) +#define BROTLI_USE_PACKED_FOR_UNALIGNED 1 +#else +#define BROTLI_USE_PACKED_FOR_UNALIGNED 0 +#endif +#endif /* defined(BROTLI_USE_PACKED_FOR_UNALIGNED) */ + +#if BROTLI_USE_PACKED_FOR_UNALIGNED + +typedef union BrotliPackedValue { + uint16_t u16; + uint32_t u32; + uint64_t u64; + size_t szt; +} __attribute__ ((packed)) BrotliPackedValue; + +static BROTLI_INLINE uint16_t BrotliUnalignedRead16(const void* p) { + const BrotliPackedValue* address = (const BrotliPackedValue*)p; + return address->u16; +} +static BROTLI_INLINE uint32_t BrotliUnalignedRead32(const void* p) { + const BrotliPackedValue* address = (const BrotliPackedValue*)p; + return address->u32; +} +static BROTLI_INLINE uint64_t BrotliUnalignedRead64(const void* p) { + const BrotliPackedValue* address = (const BrotliPackedValue*)p; + return address->u64; +} +static BROTLI_INLINE size_t BrotliUnalignedReadSizeT(const void* p) { + const BrotliPackedValue* address = (const BrotliPackedValue*)p; + return address->szt; +} +static BROTLI_INLINE void BrotliUnalignedWrite64(void* p, uint64_t v) { + BrotliPackedValue* address = (BrotliPackedValue*)p; + address->u64 = v; +} + +#else /* not BROTLI_USE_PACKED_FOR_UNALIGNED */ + +static BROTLI_INLINE uint16_t BrotliUnalignedRead16(const void* p) { + uint16_t t; + memcpy(&t, p, sizeof t); + return t; +} +static BROTLI_INLINE uint32_t BrotliUnalignedRead32(const void* p) { + uint32_t t; + memcpy(&t, p, sizeof t); + return t; +} +static BROTLI_INLINE uint64_t BrotliUnalignedRead64(const void* p) { + uint64_t t; + memcpy(&t, p, sizeof t); + return t; +} +static BROTLI_INLINE size_t BrotliUnalignedReadSizeT(const void* p) { + size_t t; + memcpy(&t, p, sizeof t); + return t; +} +static BROTLI_INLINE void BrotliUnalignedWrite64(void* p, uint64_t v) { + memcpy(p, &v, sizeof v); +} + +#endif /* BROTLI_USE_PACKED_FOR_UNALIGNED */ + +#if BROTLI_GNUC_HAS_BUILTIN(__builtin_bswap16, 4, 3, 0) +#define BROTLI_BSWAP16(V) ((uint16_t)__builtin_bswap16(V)) +#else +#define BROTLI_BSWAP16(V) ((uint16_t)( \ + (((V) & 0xFFU) << 8) | \ + (((V) >> 8) & 0xFFU))) +#endif + +#if BROTLI_GNUC_HAS_BUILTIN(__builtin_bswap32, 4, 3, 0) +#define BROTLI_BSWAP32(V) ((uint32_t)__builtin_bswap32(V)) +#else +#define BROTLI_BSWAP32(V) ((uint32_t)( \ + (((V) & 0xFFU) << 24) | (((V) & 0xFF00U) << 8) | \ + (((V) >> 8) & 0xFF00U) | (((V) >> 24) & 0xFFU))) +#endif + +#if BROTLI_GNUC_HAS_BUILTIN(__builtin_bswap64, 4, 3, 0) +#define BROTLI_BSWAP64(V) ((uint64_t)__builtin_bswap64(V)) +#else +#define BROTLI_BSWAP64(V) ((uint64_t)( \ + (((V) & 0xFFU) << 56) | (((V) & 0xFF00U) << 40) | \ + (((V) & 0xFF0000U) << 24) | (((V) & 0xFF000000U) << 8) | \ + (((V) >> 8) & 0xFF000000U) | (((V) >> 24) & 0xFF0000U) | \ + (((V) >> 40) & 0xFF00U) | (((V) >> 56) & 0xFFU))) +#endif + +#if BROTLI_LITTLE_ENDIAN +/* Straight endianness. Just read / write values. */ +#define BROTLI_UNALIGNED_LOAD16LE BrotliUnalignedRead16 +#define BROTLI_UNALIGNED_LOAD32LE BrotliUnalignedRead32 +#define BROTLI_UNALIGNED_LOAD64LE BrotliUnalignedRead64 +#define BROTLI_UNALIGNED_STORE64LE BrotliUnalignedWrite64 +#elif BROTLI_BIG_ENDIAN /* BROTLI_LITTLE_ENDIAN */ +static BROTLI_INLINE uint16_t BROTLI_UNALIGNED_LOAD16LE(const void* p) { + uint16_t value = BrotliUnalignedRead16(p); + return BROTLI_BSWAP16(value); +} +static BROTLI_INLINE uint32_t BROTLI_UNALIGNED_LOAD32LE(const void* p) { + uint32_t value = BrotliUnalignedRead32(p); + return BROTLI_BSWAP32(value); +} +static BROTLI_INLINE uint64_t BROTLI_UNALIGNED_LOAD64LE(const void* p) { + uint64_t value = BrotliUnalignedRead64(p); + return BROTLI_BSWAP64(value); +} +static BROTLI_INLINE void BROTLI_UNALIGNED_STORE64LE(void* p, uint64_t v) { + uint64_t value = BROTLI_BSWAP64(v); + BrotliUnalignedWrite64(p, value); +} +#else /* BROTLI_LITTLE_ENDIAN */ +/* Read / store values byte-wise; hopefully compiler will understand. */ +static BROTLI_INLINE uint16_t BROTLI_UNALIGNED_LOAD16LE(const void* p) { + const uint8_t* in = (const uint8_t*)p; + return (uint16_t)(in[0] | (in[1] << 8)); +} +static BROTLI_INLINE uint32_t BROTLI_UNALIGNED_LOAD32LE(const void* p) { + const uint8_t* in = (const uint8_t*)p; + uint32_t value = (uint32_t)(in[0]); + value |= (uint32_t)(in[1]) << 8; + value |= (uint32_t)(in[2]) << 16; + value |= (uint32_t)(in[3]) << 24; + return value; +} +static BROTLI_INLINE uint64_t BROTLI_UNALIGNED_LOAD64LE(const void* p) { + const uint8_t* in = (const uint8_t*)p; + uint64_t value = (uint64_t)(in[0]); + value |= (uint64_t)(in[1]) << 8; + value |= (uint64_t)(in[2]) << 16; + value |= (uint64_t)(in[3]) << 24; + value |= (uint64_t)(in[4]) << 32; + value |= (uint64_t)(in[5]) << 40; + value |= (uint64_t)(in[6]) << 48; + value |= (uint64_t)(in[7]) << 56; + return value; +} +static BROTLI_INLINE void BROTLI_UNALIGNED_STORE64LE(void* p, uint64_t v) { + uint8_t* out = (uint8_t*)p; + out[0] = (uint8_t)v; + out[1] = (uint8_t)(v >> 8); + out[2] = (uint8_t)(v >> 16); + out[3] = (uint8_t)(v >> 24); + out[4] = (uint8_t)(v >> 32); + out[5] = (uint8_t)(v >> 40); + out[6] = (uint8_t)(v >> 48); + out[7] = (uint8_t)(v >> 56); +} +#endif /* BROTLI_LITTLE_ENDIAN */ + +static BROTLI_INLINE void* BROTLI_UNALIGNED_LOAD_PTR(const void* p) { + void* v; + memcpy(&v, p, sizeof(void*)); + return v; +} + +static BROTLI_INLINE void BROTLI_UNALIGNED_STORE_PTR(void* p, const void* v) { + memcpy(p, &v, sizeof(void*)); +} + +/* BROTLI_IS_CONSTANT macros returns true for compile-time constants. */ +#if BROTLI_GNUC_HAS_BUILTIN(__builtin_constant_p, 3, 0, 1) || \ + BROTLI_INTEL_VERSION_CHECK(16, 0, 0) +#define BROTLI_IS_CONSTANT(x) (!!__builtin_constant_p(x)) +#else +#define BROTLI_IS_CONSTANT(x) (!!0) +#endif + +#if defined(BROTLI_TARGET_ARMV7) || defined(BROTLI_TARGET_ARMV8_ANY) +#define BROTLI_HAS_UBFX (!!1) +#else +#define BROTLI_HAS_UBFX (!!0) +#endif + +#if defined(BROTLI_ENABLE_LOG) +#define BROTLI_LOG(x) printf x +#else +#define BROTLI_LOG(x) +#endif + +#if defined(BROTLI_DEBUG) || defined(BROTLI_ENABLE_LOG) +#define BROTLI_ENABLE_DUMP_DEFAULT 1 +#define BROTLI_DCHECK(x) assert(x) +#else +#define BROTLI_ENABLE_DUMP_DEFAULT 0 +#define BROTLI_DCHECK(x) +#endif + +#if !defined(BROTLI_ENABLE_DUMP) +#define BROTLI_ENABLE_DUMP BROTLI_ENABLE_DUMP_DEFAULT +#endif + +#if BROTLI_ENABLE_DUMP +static BROTLI_INLINE void BrotliDump(const char* f, int l, const char* fn) { + fprintf(stderr, "%s:%d (%s)\n", f, l, fn); + fflush(stderr); +} +#define BROTLI_DUMP() BrotliDump(__FILE__, __LINE__, __FUNCTION__) +#else +#define BROTLI_DUMP() (void)(0) +#endif + +/* BrotliRBit assumes brotli_reg_t fits native CPU register type. */ +#if (BROTLI_64_BITS == BROTLI_TARGET_64_BITS) +/* TODO(eustas): add appropriate icc/sunpro/arm/ibm/ti checks. */ +#if (BROTLI_GNUC_VERSION_CHECK(3, 0, 0) || defined(__llvm__)) && \ + !defined(BROTLI_BUILD_NO_RBIT) +#if defined(BROTLI_TARGET_ARMV7) || defined(BROTLI_TARGET_ARMV8_ANY) +/* TODO(eustas): detect ARMv6T2 and enable this code for it. */ +static BROTLI_INLINE brotli_reg_t BrotliRBit(brotli_reg_t input) { + brotli_reg_t output; + __asm__("rbit %0, %1\n" : "=r"(output) : "r"(input)); + return output; +} +#define BROTLI_RBIT(x) BrotliRBit(x) +#endif /* armv7 / armv8 */ +#endif /* gcc || clang */ +#endif /* brotli_reg_t is native */ +#if !defined(BROTLI_RBIT) +static BROTLI_INLINE void BrotliRBit(void) { /* Should break build if used. */ } +#endif /* BROTLI_RBIT */ + +#define BROTLI_REPEAT_4(X) {X; X; X; X;} +#define BROTLI_REPEAT_5(X) {X; X; X; X; X;} +#define BROTLI_REPEAT_6(X) {X; X; X; X; X; X;} + +#define BROTLI_UNUSED(X) (void)(X) + +#define BROTLI_MIN_MAX(T) \ + static BROTLI_INLINE T brotli_min_ ## T (T a, T b) { return a < b ? a : b; } \ + static BROTLI_INLINE T brotli_max_ ## T (T a, T b) { return a > b ? a : b; } +BROTLI_MIN_MAX(double) BROTLI_MIN_MAX(float) BROTLI_MIN_MAX(int) +BROTLI_MIN_MAX(size_t) BROTLI_MIN_MAX(uint32_t) BROTLI_MIN_MAX(uint8_t) +#undef BROTLI_MIN_MAX +#define BROTLI_MIN(T, A, B) (brotli_min_ ## T((A), (B))) +#define BROTLI_MAX(T, A, B) (brotli_max_ ## T((A), (B))) + +#define BROTLI_SWAP(T, A, I, J) { \ + T __brotli_swap_tmp = (A)[(I)]; \ + (A)[(I)] = (A)[(J)]; \ + (A)[(J)] = __brotli_swap_tmp; \ +} + +#if BROTLI_64_BITS +#if BROTLI_GNUC_HAS_BUILTIN(__builtin_ctzll, 3, 4, 0) || \ + BROTLI_INTEL_VERSION_CHECK(16, 0, 0) +#define BROTLI_TZCNT64 __builtin_ctzll +#elif BROTLI_MSVC_VERSION_CHECK(18, 0, 0) +#if defined(BROTLI_TARGET_X64) && !defined(_M_ARM64EC) +#define BROTLI_TZCNT64 _tzcnt_u64 +#else /* BROTLI_TARGET_X64 */ +static BROTLI_INLINE uint32_t BrotliBsf64Msvc(uint64_t x) { + uint32_t lsb; + _BitScanForward64(&lsb, x); + return lsb; +} +#define BROTLI_TZCNT64 BrotliBsf64Msvc +#endif /* BROTLI_TARGET_X64 */ +#endif /* __builtin_ctzll */ +#endif /* BROTLI_64_BITS */ + +#if BROTLI_GNUC_HAS_BUILTIN(__builtin_clz, 3, 4, 0) || \ + BROTLI_INTEL_VERSION_CHECK(16, 0, 0) +#define BROTLI_BSR32(x) (31u ^ (uint32_t)__builtin_clz(x)) +#elif BROTLI_MSVC_VERSION_CHECK(18, 0, 0) +static BROTLI_INLINE uint32_t BrotliBsr32Msvc(uint32_t x) { + unsigned long msb; + _BitScanReverse(&msb, x); + return (uint32_t)msb; +} +#define BROTLI_BSR32 BrotliBsr32Msvc +#endif /* __builtin_clz */ + +/* Default brotli_alloc_func */ +BROTLI_COMMON_API void* BrotliDefaultAllocFunc(void* opaque, size_t size); + +/* Default brotli_free_func */ +BROTLI_COMMON_API void BrotliDefaultFreeFunc(void* opaque, void* address); + +/* Circular logical rotates. */ +static BROTLI_INLINE uint16_t BrotliRotateRight16(uint16_t const value, + size_t count) { + count &= 0x0F; /* for fickle pattern recognition */ + return (value >> count) | (uint16_t)(value << ((0U - count) & 0x0F)); +} +static BROTLI_INLINE uint32_t BrotliRotateRight32(uint32_t const value, + size_t count) { + count &= 0x1F; /* for fickle pattern recognition */ + return (value >> count) | (uint32_t)(value << ((0U - count) & 0x1F)); +} +static BROTLI_INLINE uint64_t BrotliRotateRight64(uint64_t const value, + size_t count) { + count &= 0x3F; /* for fickle pattern recognition */ + return (value >> count) | (uint64_t)(value << ((0U - count) & 0x3F)); +} + +BROTLI_UNUSED_FUNCTION void BrotliSuppressUnusedFunctions(void) { + BROTLI_UNUSED(&BrotliSuppressUnusedFunctions); + BROTLI_UNUSED(&BrotliUnalignedRead16); + BROTLI_UNUSED(&BrotliUnalignedRead32); + BROTLI_UNUSED(&BrotliUnalignedRead64); + BROTLI_UNUSED(&BrotliUnalignedReadSizeT); + BROTLI_UNUSED(&BrotliUnalignedWrite64); + BROTLI_UNUSED(&BROTLI_UNALIGNED_LOAD16LE); + BROTLI_UNUSED(&BROTLI_UNALIGNED_LOAD32LE); + BROTLI_UNUSED(&BROTLI_UNALIGNED_LOAD64LE); + BROTLI_UNUSED(&BROTLI_UNALIGNED_STORE64LE); + BROTLI_UNUSED(&BROTLI_UNALIGNED_LOAD_PTR); + BROTLI_UNUSED(&BROTLI_UNALIGNED_STORE_PTR); + BROTLI_UNUSED(&BrotliRBit); + BROTLI_UNUSED(&brotli_min_double); + BROTLI_UNUSED(&brotli_max_double); + BROTLI_UNUSED(&brotli_min_float); + BROTLI_UNUSED(&brotli_max_float); + BROTLI_UNUSED(&brotli_min_int); + BROTLI_UNUSED(&brotli_max_int); + BROTLI_UNUSED(&brotli_min_size_t); + BROTLI_UNUSED(&brotli_max_size_t); + BROTLI_UNUSED(&brotli_min_uint32_t); + BROTLI_UNUSED(&brotli_max_uint32_t); + BROTLI_UNUSED(&brotli_min_uint8_t); + BROTLI_UNUSED(&brotli_max_uint8_t); + BROTLI_UNUSED(&BrotliDefaultAllocFunc); + BROTLI_UNUSED(&BrotliDefaultFreeFunc); + BROTLI_UNUSED(&BrotliRotateRight16); + BROTLI_UNUSED(&BrotliRotateRight32); + BROTLI_UNUSED(&BrotliRotateRight64); +#if BROTLI_ENABLE_DUMP + BROTLI_UNUSED(&BrotliDump); +#endif + +#if defined(_MSC_VER) && (defined(_M_X64) || defined(_M_I86)) && \ + !defined(_M_ARM64EC) +/* _mm_prefetch() is not defined outside of x86/x64 */ +/* https://msdn.microsoft.com/fr-fr/library/84szxsww(v=vs.90).aspx */ +#include +#define PREFETCH_L1(ptr) _mm_prefetch((const char*)(ptr), _MM_HINT_T0) +#define PREFETCH_L2(ptr) _mm_prefetch((const char*)(ptr), _MM_HINT_T1) +#elif BROTLI_GNUC_HAS_BUILTIN(__builtin_prefetch, 3, 1, 0) +#define PREFETCH_L1(ptr) \ + __builtin_prefetch((ptr), 0 /* rw==read */, 3 /* locality */) +#define PREFETCH_L2(ptr) \ + __builtin_prefetch((ptr), 0 /* rw==read */, 2 /* locality */) +#elif defined(__aarch64__) +#define PREFETCH_L1(ptr) \ + do { \ + __asm__ __volatile__("prfm pldl1keep, %0" ::"Q"(*(ptr))); \ + } while (0) +#define PREFETCH_L2(ptr) \ + do { \ + __asm__ __volatile__("prfm pldl2keep, %0" ::"Q"(*(ptr))); \ + } while (0) +#else +#define PREFETCH_L1(ptr) \ + do { \ + (void)(ptr); \ + } while (0) /* disabled */ +#define PREFETCH_L2(ptr) \ + do { \ + (void)(ptr); \ + } while (0) /* disabled */ +#endif + +/* The SIMD matchers are only faster at certain quality levels. */ +#if defined(_M_X64) && defined(BROTLI_TZCNT64) +#define BROTLI_MAX_SIMD_QUALITY 7 +#elif defined(BROTLI_TZCNT64) +#define BROTLI_MAX_SIMD_QUALITY 6 +#endif +} + +#if defined(_MSC_VER) +#define BROTLI_CRASH() __debugbreak(), (void)abort() +#elif BROTLI_GNUC_HAS_BUILTIN(__builtin_trap, 3, 0, 0) +#define BROTLI_CRASH() (void)__builtin_trap() +#else +#define BROTLI_CRASH() (void)abort() +#endif + +/* Make BROTLI_TEST=0 act same as undefined. */ +#if defined(BROTLI_TEST) && ((1-BROTLI_TEST-1) == 0) +#undef BROTLI_TEST +#endif + +#if BROTLI_GNUC_HAS_ATTRIBUTE(model, 3, 0, 3) +#define BROTLI_MODEL(M) __attribute__((model(M))) +#else +#define BROTLI_MODEL(M) /* M */ +#endif + +#if BROTLI_GNUC_HAS_ATTRIBUTE(cold, 4, 3, 0) +#define BROTLI_COLD __attribute__((cold)) +#else +#define BROTLI_COLD /* cold */ +#endif + +#endif /* BROTLI_COMMON_PLATFORM_H_ */ diff --git a/Sources/CBrotliDec/common/shared_dictionary.c b/Sources/CBrotliDec/common/shared_dictionary.c new file mode 100644 index 0000000..cef4e20 --- /dev/null +++ b/Sources/CBrotliDec/common/shared_dictionary.c @@ -0,0 +1,517 @@ +/* Copyright 2017 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +/* Shared Dictionary definition and utilities. */ + +#include + +#include "dictionary.h" +#include "platform.h" +#include "shared_dictionary_internal.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +#if defined(BROTLI_EXPERIMENTAL) + +#define BROTLI_NUM_ENCODED_LENGTHS (SHARED_BROTLI_MAX_DICTIONARY_WORD_LENGTH \ + - SHARED_BROTLI_MIN_DICTIONARY_WORD_LENGTH + 1) + +/* Max allowed by spec */ +#define BROTLI_MAX_SIZE_BITS 15u + +/* Returns BROTLI_TRUE on success, BROTLI_FALSE on failure. */ +static BROTLI_BOOL ReadBool(const uint8_t* encoded, size_t size, size_t* pos, + BROTLI_BOOL* result) { + uint8_t value; + size_t position = *pos; + if (position >= size) return BROTLI_FALSE; /* past file end */ + value = encoded[position++]; + if (value > 1) return BROTLI_FALSE; /* invalid bool */ + *result = TO_BROTLI_BOOL(value); + *pos = position; + return BROTLI_TRUE; /* success */ +} + +/* Returns BROTLI_TRUE on success, BROTLI_FALSE on failure. */ +static BROTLI_BOOL ReadUint8(const uint8_t* encoded, size_t size, size_t* pos, + uint8_t* result) { + size_t position = *pos; + if (position + sizeof(uint8_t) > size) return BROTLI_FALSE; + *result = encoded[position++]; + *pos = position; + return BROTLI_TRUE; +} + +/* Returns BROTLI_TRUE on success, BROTLI_FALSE on failure. */ +static BROTLI_BOOL ReadUint16(const uint8_t* encoded, size_t size, size_t* pos, + uint16_t* result) { + size_t position = *pos; + if (position + sizeof(uint16_t) > size) return BROTLI_FALSE; + *result = BROTLI_UNALIGNED_LOAD16LE(&encoded[position]); + position += 2; + *pos = position; + return BROTLI_TRUE; +} + +/* Reads a varint into a uint32_t, and returns error if it's too large */ +/* Returns BROTLI_TRUE on success, BROTLI_FALSE on failure. */ +static BROTLI_BOOL ReadVarint32(const uint8_t* encoded, size_t size, + size_t* pos, uint32_t* result) { + int num = 0; + uint8_t byte; + *result = 0; + for (;;) { + if (*pos >= size) return BROTLI_FALSE; + byte = encoded[(*pos)++]; + if (num == 4 && byte > 15) return BROTLI_FALSE; + *result |= (uint32_t)(byte & 127) << (num * 7); + if (byte < 128) return BROTLI_TRUE; + num++; + } +} + +/* Returns the total length of word list. */ +static size_t BrotliSizeBitsToOffsets(const uint8_t* size_bits_by_length, + uint32_t* offsets_by_length) { + uint32_t pos = 0; + uint32_t i; + for (i = 0; i <= SHARED_BROTLI_MAX_DICTIONARY_WORD_LENGTH; i++) { + offsets_by_length[i] = pos; + if (size_bits_by_length[i] != 0) { + pos += i << size_bits_by_length[i]; + } + } + return pos; +} + +static BROTLI_BOOL ParseWordList(size_t size, const uint8_t* encoded, + size_t* pos, BrotliDictionary* out) { + size_t offset; + size_t i; + size_t position = *pos; + if (position + BROTLI_NUM_ENCODED_LENGTHS > size) { + return BROTLI_FALSE; + } + + memset(out->size_bits_by_length, 0, SHARED_BROTLI_MIN_DICTIONARY_WORD_LENGTH); + memcpy(out->size_bits_by_length + SHARED_BROTLI_MIN_DICTIONARY_WORD_LENGTH, + &encoded[position], BROTLI_NUM_ENCODED_LENGTHS); + for (i = SHARED_BROTLI_MIN_DICTIONARY_WORD_LENGTH; + i <= SHARED_BROTLI_MAX_DICTIONARY_WORD_LENGTH; i++) { + if (out->size_bits_by_length[i] > BROTLI_MAX_SIZE_BITS) { + return BROTLI_FALSE; + } + } + position += BROTLI_NUM_ENCODED_LENGTHS; + offset = BrotliSizeBitsToOffsets( + out->size_bits_by_length, out->offsets_by_length); + + out->data = &encoded[position]; + out->data_size = offset; + position += offset; + if (position > size) return BROTLI_FALSE; + *pos = position; + return BROTLI_TRUE; +} + +/* Computes the cutOffTransforms of a BrotliTransforms which already has the + transforms data correctly filled in. */ +static void ComputeCutoffTransforms(BrotliTransforms* transforms) { + uint32_t i; + for (i = 0; i < BROTLI_TRANSFORMS_MAX_CUT_OFF + 1; i++) { + transforms->cutOffTransforms[i] = -1; + } + for (i = 0; i < transforms->num_transforms; i++) { + const uint8_t* prefix = BROTLI_TRANSFORM_PREFIX(transforms, i); + uint8_t type = BROTLI_TRANSFORM_TYPE(transforms, i); + const uint8_t* suffix = BROTLI_TRANSFORM_SUFFIX(transforms, i); + if (type <= BROTLI_TRANSFORM_OMIT_LAST_9 && *prefix == 0 && *suffix == 0 && + transforms->cutOffTransforms[type] == -1) { + transforms->cutOffTransforms[type] = (int16_t)i; + } + } +} + +static BROTLI_BOOL ParsePrefixSuffixTable(size_t size, const uint8_t* encoded, + size_t* pos, BrotliTransforms* out, uint16_t* out_table, + size_t* out_table_size) { + size_t position = *pos; + size_t offset = 0; + size_t stringlet_count = 0; /* NUM_PREFIX_SUFFIX */ + size_t data_length = 0; + + /* PREFIX_SUFFIX_LENGTH */ + if (!ReadUint16(encoded, size, &position, &out->prefix_suffix_size)) { + return BROTLI_FALSE; + } + data_length = out->prefix_suffix_size; + + /* Must at least have space for null terminator. */ + if (data_length < 1) return BROTLI_FALSE; + out->prefix_suffix = &encoded[position]; + if (position + data_length >= size) return BROTLI_FALSE; + while (BROTLI_TRUE) { + /* STRING_LENGTH */ + size_t stringlet_len = encoded[position + offset]; + out_table[stringlet_count] = (uint16_t)offset; + stringlet_count++; + offset++; + if (stringlet_len == 0) { + if (offset == data_length) { + break; + } else { + return BROTLI_FALSE; + } + } + if (stringlet_count > 255) return BROTLI_FALSE; + offset += stringlet_len; + if (offset >= data_length) return BROTLI_FALSE; + } + + position += data_length; + *pos = position; + *out_table_size = (uint16_t)stringlet_count; + return BROTLI_TRUE; +} + +static BROTLI_BOOL ParseTransformsList(size_t size, const uint8_t* encoded, + size_t* pos, BrotliTransforms* out, uint16_t* prefix_suffix_table, + size_t* prefix_suffix_count) { + uint32_t i; + BROTLI_BOOL has_params = BROTLI_FALSE; + BROTLI_BOOL prefix_suffix_ok = BROTLI_FALSE; + size_t position = *pos; + size_t stringlet_cnt = 0; + if (position >= size) return BROTLI_FALSE; + + prefix_suffix_ok = ParsePrefixSuffixTable( + size, encoded, &position, out, prefix_suffix_table, &stringlet_cnt); + if (!prefix_suffix_ok) return BROTLI_FALSE; + out->prefix_suffix_map = prefix_suffix_table; + *prefix_suffix_count = stringlet_cnt; + + out->num_transforms = encoded[position++]; + out->transforms = &encoded[position]; + position += (size_t)out->num_transforms * 3; + if (position > size) return BROTLI_FALSE; + /* Check for errors and read extra parameters. */ + for (i = 0; i < out->num_transforms; i++) { + uint8_t prefix_id = BROTLI_TRANSFORM_PREFIX_ID(out, i); + uint8_t type = BROTLI_TRANSFORM_TYPE(out, i); + uint8_t suffix_id = BROTLI_TRANSFORM_SUFFIX_ID(out, i); + if (prefix_id >= stringlet_cnt) return BROTLI_FALSE; + if (type >= BROTLI_NUM_TRANSFORM_TYPES) return BROTLI_FALSE; + if (suffix_id >= stringlet_cnt) return BROTLI_FALSE; + if (type == BROTLI_TRANSFORM_SHIFT_FIRST || + type == BROTLI_TRANSFORM_SHIFT_ALL) { + has_params = BROTLI_TRUE; + } + } + if (has_params) { + out->params = &encoded[position]; + position += (size_t)out->num_transforms * 2; + if (position > size) return BROTLI_FALSE; + for (i = 0; i < out->num_transforms; i++) { + uint8_t type = BROTLI_TRANSFORM_TYPE(out, i); + if (type != BROTLI_TRANSFORM_SHIFT_FIRST && + type != BROTLI_TRANSFORM_SHIFT_ALL) { + if (out->params[i * 2] != 0 || out->params[i * 2 + 1] != 0) { + return BROTLI_FALSE; + } + } + } + } else { + out->params = NULL; + } + ComputeCutoffTransforms(out); + *pos = position; + return BROTLI_TRUE; +} + +static BROTLI_BOOL DryParseDictionary(const uint8_t* encoded, + size_t size, uint32_t* num_prefix, BROTLI_BOOL* is_custom_static_dict) { + size_t pos = 0; + uint32_t chunk_size = 0; + uint8_t num_word_lists; + uint8_t num_transform_lists; + *is_custom_static_dict = BROTLI_FALSE; + *num_prefix = 0; + + /* Skip magic header bytes. */ + pos += 2; + + /* LZ77_DICTIONARY_LENGTH */ + if (!ReadVarint32(encoded, size, &pos, &chunk_size)) return BROTLI_FALSE; + if (chunk_size != 0) { + /* This limitation is not specified but the 32-bit Brotli decoder for now */ + if (chunk_size > 1073741823) return BROTLI_FALSE; + *num_prefix = 1; + if (pos + chunk_size > size) return BROTLI_FALSE; + pos += chunk_size; + } + + if (!ReadUint8(encoded, size, &pos, &num_word_lists)) { + return BROTLI_FALSE; + } + if (!ReadUint8(encoded, size, &pos, &num_transform_lists)) { + return BROTLI_FALSE; + } + + if (num_word_lists > 0 || num_transform_lists > 0) { + *is_custom_static_dict = BROTLI_TRUE; + } + + return BROTLI_TRUE; +} + +static BROTLI_BOOL ParseDictionary(const uint8_t* encoded, size_t size, + BrotliSharedDictionary* dict) { + uint32_t i; + size_t pos = 0; + uint32_t chunk_size = 0; + size_t total_prefix_suffix_count = 0; + size_t transform_list_start[SHARED_BROTLI_NUM_DICTIONARY_CONTEXTS]; + uint16_t temporary_prefix_suffix_table[256]; + + /* Skip magic header bytes. */ + pos += 2; + + /* LZ77_DICTIONARY_LENGTH */ + if (!ReadVarint32(encoded, size, &pos, &chunk_size)) return BROTLI_FALSE; + if (chunk_size != 0) { + if (pos + chunk_size > size) return BROTLI_FALSE; + dict->prefix_size[dict->num_prefix] = chunk_size; + dict->prefix[dict->num_prefix] = &encoded[pos]; + dict->num_prefix++; + /* LZ77_DICTIONARY_LENGTH bytes. */ + pos += chunk_size; + } + + /* NUM_WORD_LISTS */ + if (!ReadUint8(encoded, size, &pos, &dict->num_word_lists)) { + return BROTLI_FALSE; + } + if (dict->num_word_lists > SHARED_BROTLI_NUM_DICTIONARY_CONTEXTS) { + return BROTLI_FALSE; + } + + if (dict->num_word_lists != 0) { + dict->words_instances = (BrotliDictionary*)dict->alloc_func( + dict->memory_manager_opaque, + dict->num_word_lists * sizeof(*dict->words_instances)); + if (!dict->words_instances) return BROTLI_FALSE; /* OOM */ + } + for (i = 0; i < dict->num_word_lists; i++) { + if (!ParseWordList(size, encoded, &pos, &dict->words_instances[i])) { + return BROTLI_FALSE; + } + } + + /* NUM_TRANSFORM_LISTS */ + if (!ReadUint8(encoded, size, &pos, &dict->num_transform_lists)) { + return BROTLI_FALSE; + } + if (dict->num_transform_lists > SHARED_BROTLI_NUM_DICTIONARY_CONTEXTS) { + return BROTLI_FALSE; + } + + if (dict->num_transform_lists != 0) { + dict->transforms_instances = (BrotliTransforms*)dict->alloc_func( + dict->memory_manager_opaque, + dict->num_transform_lists * sizeof(*dict->transforms_instances)); + if (!dict->transforms_instances) return BROTLI_FALSE; /* OOM */ + } + for (i = 0; i < dict->num_transform_lists; i++) { + BROTLI_BOOL ok = BROTLI_FALSE; + size_t prefix_suffix_count = 0; + transform_list_start[i] = pos; + dict->transforms_instances[i].prefix_suffix_map = + temporary_prefix_suffix_table; + ok = ParseTransformsList( + size, encoded, &pos, &dict->transforms_instances[i], + temporary_prefix_suffix_table, &prefix_suffix_count); + if (!ok) return BROTLI_FALSE; + total_prefix_suffix_count += prefix_suffix_count; + } + if (total_prefix_suffix_count != 0) { + dict->prefix_suffix_maps = (uint16_t*)dict->alloc_func( + dict->memory_manager_opaque, + total_prefix_suffix_count * sizeof(*dict->prefix_suffix_maps)); + if (!dict->prefix_suffix_maps) return BROTLI_FALSE; /* OOM */ + } + total_prefix_suffix_count = 0; + for (i = 0; i < dict->num_transform_lists; i++) { + size_t prefix_suffix_count = 0; + size_t position = transform_list_start[i]; + uint16_t* prefix_suffix_map = + &dict->prefix_suffix_maps[total_prefix_suffix_count]; + BROTLI_BOOL ok = ParsePrefixSuffixTable( + size, encoded, &position, &dict->transforms_instances[i], + prefix_suffix_map, &prefix_suffix_count); + if (!ok) return BROTLI_FALSE; + dict->transforms_instances[i].prefix_suffix_map = prefix_suffix_map; + total_prefix_suffix_count += prefix_suffix_count; + } + + if (dict->num_word_lists != 0 || dict->num_transform_lists != 0) { + if (!ReadUint8(encoded, size, &pos, &dict->num_dictionaries)) { + return BROTLI_FALSE; + } + if (dict->num_dictionaries == 0 || + dict->num_dictionaries > SHARED_BROTLI_NUM_DICTIONARY_CONTEXTS) { + return BROTLI_FALSE; + } + for (i = 0; i < dict->num_dictionaries; i++) { + uint8_t words_index; + uint8_t transforms_index; + if (!ReadUint8(encoded, size, &pos, &words_index)) { + return BROTLI_FALSE; + } + if (words_index > dict->num_word_lists) return BROTLI_FALSE; + if (!ReadUint8(encoded, size, &pos, &transforms_index)) { + return BROTLI_FALSE; + } + if (transforms_index > dict->num_transform_lists) return BROTLI_FALSE; + dict->words[i] = words_index == dict->num_word_lists ? + BrotliGetDictionary() : &dict->words_instances[words_index]; + dict->transforms[i] = transforms_index == dict->num_transform_lists ? + BrotliGetTransforms(): &dict->transforms_instances[transforms_index]; + } + /* CONTEXT_ENABLED */ + if (!ReadBool(encoded, size, &pos, &dict->context_based)) { + return BROTLI_FALSE; + } + + /* CONTEXT_MAP */ + if (dict->context_based) { + for (i = 0; i < SHARED_BROTLI_NUM_DICTIONARY_CONTEXTS; i++) { + if (!ReadUint8(encoded, size, &pos, &dict->context_map[i])) { + return BROTLI_FALSE; + } + if (dict->context_map[i] >= dict->num_dictionaries) { + return BROTLI_FALSE; + } + } + } + } else { + dict->context_based = BROTLI_FALSE; + dict->num_dictionaries = 1; + dict->words[0] = BrotliGetDictionary(); + dict->transforms[0] = BrotliGetTransforms(); + } + + return BROTLI_TRUE; +} + +/* Decodes shared dictionary and verifies correctness. + Returns BROTLI_TRUE if dictionary is valid, BROTLI_FALSE otherwise. + The BrotliSharedDictionary must already have been initialized. If the + BrotliSharedDictionary already contains data, compound dictionaries + will be appended, but an error will be returned if it already has + custom words or transforms. + TODO(lode): link to RFC for shared brotli once published. */ +static BROTLI_BOOL DecodeSharedDictionary( + const uint8_t* encoded, size_t size, BrotliSharedDictionary* dict) { + uint32_t num_prefix = 0; + BROTLI_BOOL is_custom_static_dict = BROTLI_FALSE; + BROTLI_BOOL has_custom_static_dict = + dict->num_word_lists > 0 || dict->num_transform_lists > 0; + + /* Check magic header bytes. */ + if (size < 2) return BROTLI_FALSE; + if (encoded[0] != 0x91 || encoded[1] != 0) return BROTLI_FALSE; + + if (!DryParseDictionary(encoded, size, &num_prefix, &is_custom_static_dict)) { + return BROTLI_FALSE; + } + + if (num_prefix + dict->num_prefix > SHARED_BROTLI_MAX_COMPOUND_DICTS) { + return BROTLI_FALSE; + } + + /* Cannot combine different static dictionaries, only prefix dictionaries */ + if (has_custom_static_dict && is_custom_static_dict) return BROTLI_FALSE; + + return ParseDictionary(encoded, size, dict); +} + +#endif /* BROTLI_EXPERIMENTAL */ + +void BrotliSharedDictionaryDestroyInstance( + BrotliSharedDictionary* dict) { + if (!dict) { + return; + } else { + brotli_free_func free_func = dict->free_func; + void* opaque = dict->memory_manager_opaque; + /* Cleanup. */ + free_func(opaque, dict->words_instances); + free_func(opaque, dict->transforms_instances); + free_func(opaque, dict->prefix_suffix_maps); + /* Self-destruction. */ + free_func(opaque, dict); + } +} + +BROTLI_BOOL BrotliSharedDictionaryAttach( + BrotliSharedDictionary* dict, BrotliSharedDictionaryType type, + size_t data_size, const uint8_t data[BROTLI_ARRAY_PARAM(data_size)]) { + if (!dict) { + return BROTLI_FALSE; + } +#if defined(BROTLI_EXPERIMENTAL) + if (type == BROTLI_SHARED_DICTIONARY_SERIALIZED) { + return DecodeSharedDictionary(data, data_size, dict); + } +#endif /* BROTLI_EXPERIMENTAL */ + if (type == BROTLI_SHARED_DICTIONARY_RAW) { + if (dict->num_prefix >= SHARED_BROTLI_MAX_COMPOUND_DICTS) { + return BROTLI_FALSE; + } + dict->prefix_size[dict->num_prefix] = data_size; + dict->prefix[dict->num_prefix] = data; + dict->num_prefix++; + return BROTLI_TRUE; + } + return BROTLI_FALSE; +} + +BrotliSharedDictionary* BrotliSharedDictionaryCreateInstance( + brotli_alloc_func alloc_func, brotli_free_func free_func, void* opaque) { + BrotliSharedDictionary* dict = 0; + if (!alloc_func && !free_func) { + dict = (BrotliSharedDictionary*)malloc(sizeof(BrotliSharedDictionary)); + } else if (alloc_func && free_func) { + dict = (BrotliSharedDictionary*)alloc_func( + opaque, sizeof(BrotliSharedDictionary)); + } + if (dict == 0) { + return 0; + } + + /* TODO(eustas): explicitly initialize all the fields? */ + memset(dict, 0, sizeof(BrotliSharedDictionary)); + + dict->context_based = BROTLI_FALSE; + dict->num_dictionaries = 1; + dict->num_word_lists = 0; + dict->num_transform_lists = 0; + + dict->words[0] = BrotliGetDictionary(); + dict->transforms[0] = BrotliGetTransforms(); + + dict->alloc_func = alloc_func ? alloc_func : BrotliDefaultAllocFunc; + dict->free_func = free_func ? free_func : BrotliDefaultFreeFunc; + dict->memory_manager_opaque = opaque; + + return dict; +} + +#if defined(__cplusplus) || defined(c_plusplus) +} /* extern "C" */ +#endif diff --git a/Sources/CBrotliDec/common/shared_dictionary_internal.h b/Sources/CBrotliDec/common/shared_dictionary_internal.h new file mode 100644 index 0000000..c6a90fa --- /dev/null +++ b/Sources/CBrotliDec/common/shared_dictionary_internal.h @@ -0,0 +1,75 @@ +/* Copyright 2017 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +/* (Transparent) Shared Dictionary definition. */ + +#ifndef BROTLI_COMMON_SHARED_DICTIONARY_INTERNAL_H_ +#define BROTLI_COMMON_SHARED_DICTIONARY_INTERNAL_H_ + +#include + +#include "dictionary.h" +#include "platform.h" +#include "transform.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +struct BrotliSharedDictionaryStruct { + /* LZ77 prefixes (compound dictionary). */ + uint32_t num_prefix; /* max SHARED_BROTLI_MAX_COMPOUND_DICTS */ + size_t prefix_size[SHARED_BROTLI_MAX_COMPOUND_DICTS]; + const uint8_t* prefix[SHARED_BROTLI_MAX_COMPOUND_DICTS]; + + /* If set, the context map is used to select word and transform list from 64 + contexts, if not set, the context map is not used and only words[0] and + transforms[0] are to be used. */ + BROTLI_BOOL context_based; + + uint8_t context_map[SHARED_BROTLI_NUM_DICTIONARY_CONTEXTS]; + + /* Amount of word_list+transform_list combinations. */ + uint8_t num_dictionaries; + + /* Must use num_dictionaries values. */ + const BrotliDictionary* words[SHARED_BROTLI_NUM_DICTIONARY_CONTEXTS]; + + /* Must use num_dictionaries values. */ + const BrotliTransforms* transforms[SHARED_BROTLI_NUM_DICTIONARY_CONTEXTS]; + + /* Amount of custom word lists. May be 0 if only Brotli's built-in is used */ + uint8_t num_word_lists; + + /* Contents of the custom words lists. Must be NULL if num_word_lists is 0. */ + BrotliDictionary* words_instances; + + /* Amount of custom transform lists. May be 0 if only Brotli's built-in is + used */ + uint8_t num_transform_lists; + + /* Contents of the custom transform lists. Must be NULL if num_transform_lists + is 0. */ + BrotliTransforms* transforms_instances; + + /* Concatenated prefix_suffix_maps of the custom transform lists. Must be NULL + if num_transform_lists is 0. */ + uint16_t* prefix_suffix_maps; + + /* Memory management */ + brotli_alloc_func alloc_func; + brotli_free_func free_func; + void* memory_manager_opaque; +}; + +typedef struct BrotliSharedDictionaryStruct BrotliSharedDictionaryInternal; +#define BrotliSharedDictionary BrotliSharedDictionaryInternal + +#if defined(__cplusplus) || defined(c_plusplus) +} /* extern "C" */ +#endif + +#endif /* BROTLI_COMMON_SHARED_DICTIONARY_INTERNAL_H_ */ diff --git a/Sources/CBrotliDec/common/static_init.h b/Sources/CBrotliDec/common/static_init.h new file mode 100644 index 0000000..12744de --- /dev/null +++ b/Sources/CBrotliDec/common/static_init.h @@ -0,0 +1,56 @@ +/* Copyright 2025 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +/* + Central point for static initialization. + + In case of "lazy" mode `BrotliXxxLazyStaticInit` is not provided by the + library. Embedder is responsible for providing it. This function should call + `BrotliXxxLazyStaticInitInner` on the first invocation. This function should + not return until execution of `BrotliXxxLazyStaticInitInner` is finished. + In C or before C++11 it is possible to call `BrotliXxxLazyStaticInitInner` + on start-up path and then `BrotliEncoderLazyStaticInit` is could be no-op; + another option is to use available thread execution controls to meet the + requirements. For possible C++11 implementation see static_init_lazy.cc. +*/ + +#ifndef THIRD_PARTY_BROTLI_COMMON_STATIC_INIT_H_ +#define THIRD_PARTY_BROTLI_COMMON_STATIC_INIT_H_ + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +/* Static data is "initialized" in compile time. */ +#define BROTLI_STATIC_INIT_NONE 0 +/* Static data is initialized before "main". */ +#define BROTLI_STATIC_INIT_EARLY 1 +/* Static data is initialized when first encoder is created. */ +#define BROTLI_STATIC_INIT_LAZY 2 + +#define BROTLI_STATIC_INIT_DEFAULT BROTLI_STATIC_INIT_NONE + +#if !defined(BROTLI_STATIC_INIT) +#define BROTLI_STATIC_INIT BROTLI_STATIC_INIT_DEFAULT +#endif + +#if (BROTLI_STATIC_INIT != BROTLI_STATIC_INIT_NONE) && \ + (BROTLI_STATIC_INIT != BROTLI_STATIC_INIT_EARLY) && \ + (BROTLI_STATIC_INIT != BROTLI_STATIC_INIT_LAZY) +#error Invalid value for BROTLI_STATIC_INIT +#endif + +#if (BROTLI_STATIC_INIT == BROTLI_STATIC_INIT_EARLY) +#if defined(BROTLI_EXTERNAL_DICTIONARY_DATA) +#error BROTLI_STATIC_INIT_EARLY will fail with BROTLI_EXTERNAL_DICTIONARY_DATA +#endif +#endif /* BROTLI_STATIC_INIT */ + +#if defined(__cplusplus) || defined(c_plusplus) +} /* extern "C" */ +#endif + +#endif // THIRD_PARTY_BROTLI_COMMON_STATIC_INIT_H_ diff --git a/Sources/CBrotliDec/common/transform.c b/Sources/CBrotliDec/common/transform.c new file mode 100644 index 0000000..968b912 --- /dev/null +++ b/Sources/CBrotliDec/common/transform.c @@ -0,0 +1,293 @@ +/* Copyright 2013 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +#include "platform.h" +#include "transform.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +/* RFC 7932 transforms string data */ +static const BROTLI_MODEL("small") char kPrefixSuffix[217] = + "\1 \2, \10 of the \4 of \2s \1.\5 and \4 " +/* 0x _0 _2 __5 _E _3 _6 _8 _E */ + "in \1\"\4 to \2\">\1\n\2. \1]\5 for \3 a \6 " +/* 2x _3_ _5 _A_ _D_ _F _2 _4 _A _E */ + "that \1\'\6 with \6 from \4 by \1(\6. T" +/* 4x _5_ _7 _E _5 _A _C */ + "he \4 on \4 as \4 is \4ing \2\n\t\1:\3ed " +/* 6x _3 _8 _D _2 _7_ _ _A _C */ + "\2=\"\4 at \3ly \1,\2=\'\5.com/\7. This \5" +/* 8x _0 _ _3 _8 _C _E _ _1 _7 _F */ + " not \3er \3al \4ful \4ive \5less \4es" +/* Ax _5 _9 _D _2 _7 _D */ + "t \4ize \2\xc2\xa0\4ous \5 the \2e "; /* \0 - implicit trailing zero. */ +/* Cx _2 _7___ ___ _A _F _5 _8 */ + +static const BROTLI_MODEL("small") uint16_t kPrefixSuffixMap[50] = { + 0x00, 0x02, 0x05, 0x0E, 0x13, 0x16, 0x18, 0x1E, 0x23, 0x25, + 0x2A, 0x2D, 0x2F, 0x32, 0x34, 0x3A, 0x3E, 0x45, 0x47, 0x4E, + 0x55, 0x5A, 0x5C, 0x63, 0x68, 0x6D, 0x72, 0x77, 0x7A, 0x7C, + 0x80, 0x83, 0x88, 0x8C, 0x8E, 0x91, 0x97, 0x9F, 0xA5, 0xA9, + 0xAD, 0xB2, 0xB7, 0xBD, 0xC2, 0xC7, 0xCA, 0xCF, 0xD5, 0xD8 +}; + +/* RFC 7932 transforms */ +static const BROTLI_MODEL("small") uint8_t kTransformsData[] = { + 49, BROTLI_TRANSFORM_IDENTITY, 49, + 49, BROTLI_TRANSFORM_IDENTITY, 0, + 0, BROTLI_TRANSFORM_IDENTITY, 0, + 49, BROTLI_TRANSFORM_OMIT_FIRST_1, 49, + 49, BROTLI_TRANSFORM_UPPERCASE_FIRST, 0, + 49, BROTLI_TRANSFORM_IDENTITY, 47, + 0, BROTLI_TRANSFORM_IDENTITY, 49, + 4, BROTLI_TRANSFORM_IDENTITY, 0, + 49, BROTLI_TRANSFORM_IDENTITY, 3, + 49, BROTLI_TRANSFORM_UPPERCASE_FIRST, 49, + 49, BROTLI_TRANSFORM_IDENTITY, 6, + 49, BROTLI_TRANSFORM_OMIT_FIRST_2, 49, + 49, BROTLI_TRANSFORM_OMIT_LAST_1, 49, + 1, BROTLI_TRANSFORM_IDENTITY, 0, + 49, BROTLI_TRANSFORM_IDENTITY, 1, + 0, BROTLI_TRANSFORM_UPPERCASE_FIRST, 0, + 49, BROTLI_TRANSFORM_IDENTITY, 7, + 49, BROTLI_TRANSFORM_IDENTITY, 9, + 48, BROTLI_TRANSFORM_IDENTITY, 0, + 49, BROTLI_TRANSFORM_IDENTITY, 8, + 49, BROTLI_TRANSFORM_IDENTITY, 5, + 49, BROTLI_TRANSFORM_IDENTITY, 10, + 49, BROTLI_TRANSFORM_IDENTITY, 11, + 49, BROTLI_TRANSFORM_OMIT_LAST_3, 49, + 49, BROTLI_TRANSFORM_IDENTITY, 13, + 49, BROTLI_TRANSFORM_IDENTITY, 14, + 49, BROTLI_TRANSFORM_OMIT_FIRST_3, 49, + 49, BROTLI_TRANSFORM_OMIT_LAST_2, 49, + 49, BROTLI_TRANSFORM_IDENTITY, 15, + 49, BROTLI_TRANSFORM_IDENTITY, 16, + 0, BROTLI_TRANSFORM_UPPERCASE_FIRST, 49, + 49, BROTLI_TRANSFORM_IDENTITY, 12, + 5, BROTLI_TRANSFORM_IDENTITY, 49, + 0, BROTLI_TRANSFORM_IDENTITY, 1, + 49, BROTLI_TRANSFORM_OMIT_FIRST_4, 49, + 49, BROTLI_TRANSFORM_IDENTITY, 18, + 49, BROTLI_TRANSFORM_IDENTITY, 17, + 49, BROTLI_TRANSFORM_IDENTITY, 19, + 49, BROTLI_TRANSFORM_IDENTITY, 20, + 49, BROTLI_TRANSFORM_OMIT_FIRST_5, 49, + 49, BROTLI_TRANSFORM_OMIT_FIRST_6, 49, + 47, BROTLI_TRANSFORM_IDENTITY, 49, + 49, BROTLI_TRANSFORM_OMIT_LAST_4, 49, + 49, BROTLI_TRANSFORM_IDENTITY, 22, + 49, BROTLI_TRANSFORM_UPPERCASE_ALL, 49, + 49, BROTLI_TRANSFORM_IDENTITY, 23, + 49, BROTLI_TRANSFORM_IDENTITY, 24, + 49, BROTLI_TRANSFORM_IDENTITY, 25, + 49, BROTLI_TRANSFORM_OMIT_LAST_7, 49, + 49, BROTLI_TRANSFORM_OMIT_LAST_1, 26, + 49, BROTLI_TRANSFORM_IDENTITY, 27, + 49, BROTLI_TRANSFORM_IDENTITY, 28, + 0, BROTLI_TRANSFORM_IDENTITY, 12, + 49, BROTLI_TRANSFORM_IDENTITY, 29, + 49, BROTLI_TRANSFORM_OMIT_FIRST_9, 49, + 49, BROTLI_TRANSFORM_OMIT_FIRST_7, 49, + 49, BROTLI_TRANSFORM_OMIT_LAST_6, 49, + 49, BROTLI_TRANSFORM_IDENTITY, 21, + 49, BROTLI_TRANSFORM_UPPERCASE_FIRST, 1, + 49, BROTLI_TRANSFORM_OMIT_LAST_8, 49, + 49, BROTLI_TRANSFORM_IDENTITY, 31, + 49, BROTLI_TRANSFORM_IDENTITY, 32, + 47, BROTLI_TRANSFORM_IDENTITY, 3, + 49, BROTLI_TRANSFORM_OMIT_LAST_5, 49, + 49, BROTLI_TRANSFORM_OMIT_LAST_9, 49, + 0, BROTLI_TRANSFORM_UPPERCASE_FIRST, 1, + 49, BROTLI_TRANSFORM_UPPERCASE_FIRST, 8, + 5, BROTLI_TRANSFORM_IDENTITY, 21, + 49, BROTLI_TRANSFORM_UPPERCASE_ALL, 0, + 49, BROTLI_TRANSFORM_UPPERCASE_FIRST, 10, + 49, BROTLI_TRANSFORM_IDENTITY, 30, + 0, BROTLI_TRANSFORM_IDENTITY, 5, + 35, BROTLI_TRANSFORM_IDENTITY, 49, + 47, BROTLI_TRANSFORM_IDENTITY, 2, + 49, BROTLI_TRANSFORM_UPPERCASE_FIRST, 17, + 49, BROTLI_TRANSFORM_IDENTITY, 36, + 49, BROTLI_TRANSFORM_IDENTITY, 33, + 5, BROTLI_TRANSFORM_IDENTITY, 0, + 49, BROTLI_TRANSFORM_UPPERCASE_FIRST, 21, + 49, BROTLI_TRANSFORM_UPPERCASE_FIRST, 5, + 49, BROTLI_TRANSFORM_IDENTITY, 37, + 0, BROTLI_TRANSFORM_IDENTITY, 30, + 49, BROTLI_TRANSFORM_IDENTITY, 38, + 0, BROTLI_TRANSFORM_UPPERCASE_ALL, 0, + 49, BROTLI_TRANSFORM_IDENTITY, 39, + 0, BROTLI_TRANSFORM_UPPERCASE_ALL, 49, + 49, BROTLI_TRANSFORM_IDENTITY, 34, + 49, BROTLI_TRANSFORM_UPPERCASE_ALL, 8, + 49, BROTLI_TRANSFORM_UPPERCASE_FIRST, 12, + 0, BROTLI_TRANSFORM_IDENTITY, 21, + 49, BROTLI_TRANSFORM_IDENTITY, 40, + 0, BROTLI_TRANSFORM_UPPERCASE_FIRST, 12, + 49, BROTLI_TRANSFORM_IDENTITY, 41, + 49, BROTLI_TRANSFORM_IDENTITY, 42, + 49, BROTLI_TRANSFORM_UPPERCASE_ALL, 17, + 49, BROTLI_TRANSFORM_IDENTITY, 43, + 0, BROTLI_TRANSFORM_UPPERCASE_FIRST, 5, + 49, BROTLI_TRANSFORM_UPPERCASE_ALL, 10, + 0, BROTLI_TRANSFORM_IDENTITY, 34, + 49, BROTLI_TRANSFORM_UPPERCASE_FIRST, 33, + 49, BROTLI_TRANSFORM_IDENTITY, 44, + 49, BROTLI_TRANSFORM_UPPERCASE_ALL, 5, + 45, BROTLI_TRANSFORM_IDENTITY, 49, + 0, BROTLI_TRANSFORM_IDENTITY, 33, + 49, BROTLI_TRANSFORM_UPPERCASE_FIRST, 30, + 49, BROTLI_TRANSFORM_UPPERCASE_ALL, 30, + 49, BROTLI_TRANSFORM_IDENTITY, 46, + 49, BROTLI_TRANSFORM_UPPERCASE_ALL, 1, + 49, BROTLI_TRANSFORM_UPPERCASE_FIRST, 34, + 0, BROTLI_TRANSFORM_UPPERCASE_FIRST, 33, + 0, BROTLI_TRANSFORM_UPPERCASE_ALL, 30, + 0, BROTLI_TRANSFORM_UPPERCASE_ALL, 1, + 49, BROTLI_TRANSFORM_UPPERCASE_ALL, 33, + 49, BROTLI_TRANSFORM_UPPERCASE_ALL, 21, + 49, BROTLI_TRANSFORM_UPPERCASE_ALL, 12, + 0, BROTLI_TRANSFORM_UPPERCASE_ALL, 5, + 49, BROTLI_TRANSFORM_UPPERCASE_ALL, 34, + 0, BROTLI_TRANSFORM_UPPERCASE_ALL, 12, + 0, BROTLI_TRANSFORM_UPPERCASE_FIRST, 30, + 0, BROTLI_TRANSFORM_UPPERCASE_ALL, 34, + 0, BROTLI_TRANSFORM_UPPERCASE_FIRST, 34, +}; + +static const BROTLI_MODEL("small") +BrotliTransforms kBrotliTransforms = { + sizeof(kPrefixSuffix), + (const uint8_t*)kPrefixSuffix, + kPrefixSuffixMap, + sizeof(kTransformsData) / (3 * sizeof(kTransformsData[0])), + kTransformsData, + NULL, /* no extra parameters */ + {0, 12, 27, 23, 42, 63, 56, 48, 59, 64} +}; + +const BrotliTransforms* BrotliGetTransforms(void) { + return &kBrotliTransforms; +} + +static int ToUpperCase(uint8_t* p) { + if (p[0] < 0xC0) { + if (p[0] >= 'a' && p[0] <= 'z') { + p[0] ^= 32; + } + return 1; + } + /* An overly simplified uppercasing model for UTF-8. */ + if (p[0] < 0xE0) { + p[1] ^= 32; + return 2; + } + /* An arbitrary transform for three byte characters. */ + p[2] ^= 5; + return 3; +} + +static int Shift(uint8_t* word, int word_len, uint16_t parameter) { + /* Limited sign extension: scalar < (1 << 24). */ + uint32_t scalar = + (parameter & 0x7FFFu) + (0x1000000u - (parameter & 0x8000u)); + if (word[0] < 0x80) { + /* 1-byte rune / 0sssssss / 7 bit scalar (ASCII). */ + scalar += (uint32_t)word[0]; + word[0] = (uint8_t)(scalar & 0x7Fu); + return 1; + } else if (word[0] < 0xC0) { + /* Continuation / 10AAAAAA. */ + return 1; + } else if (word[0] < 0xE0) { + /* 2-byte rune / 110sssss AAssssss / 11 bit scalar. */ + if (word_len < 2) return 1; + scalar += (uint32_t)((word[1] & 0x3Fu) | ((word[0] & 0x1Fu) << 6u)); + word[0] = (uint8_t)(0xC0 | ((scalar >> 6u) & 0x1F)); + word[1] = (uint8_t)((word[1] & 0xC0) | (scalar & 0x3F)); + return 2; + } else if (word[0] < 0xF0) { + /* 3-byte rune / 1110ssss AAssssss BBssssss / 16 bit scalar. */ + if (word_len < 3) return word_len; + scalar += (uint32_t)((word[2] & 0x3Fu) | ((word[1] & 0x3Fu) << 6u) | + ((word[0] & 0x0Fu) << 12u)); + word[0] = (uint8_t)(0xE0 | ((scalar >> 12u) & 0x0F)); + word[1] = (uint8_t)((word[1] & 0xC0) | ((scalar >> 6u) & 0x3F)); + word[2] = (uint8_t)((word[2] & 0xC0) | (scalar & 0x3F)); + return 3; + } else if (word[0] < 0xF8) { + /* 4-byte rune / 11110sss AAssssss BBssssss CCssssss / 21 bit scalar. */ + if (word_len < 4) return word_len; + scalar += (uint32_t)((word[3] & 0x3Fu) | ((word[2] & 0x3Fu) << 6u) | + ((word[1] & 0x3Fu) << 12u) | ((word[0] & 0x07u) << 18u)); + word[0] = (uint8_t)(0xF0 | ((scalar >> 18u) & 0x07)); + word[1] = (uint8_t)((word[1] & 0xC0) | ((scalar >> 12u) & 0x3F)); + word[2] = (uint8_t)((word[2] & 0xC0) | ((scalar >> 6u) & 0x3F)); + word[3] = (uint8_t)((word[3] & 0xC0) | (scalar & 0x3F)); + return 4; + } + return 1; +} + +int BrotliTransformDictionaryWord(uint8_t* dst, const uint8_t* word, int len, + const BrotliTransforms* transforms, int transform_idx) { + int idx = 0; + const uint8_t* prefix = BROTLI_TRANSFORM_PREFIX(transforms, transform_idx); + uint8_t type = BROTLI_TRANSFORM_TYPE(transforms, transform_idx); + const uint8_t* suffix = BROTLI_TRANSFORM_SUFFIX(transforms, transform_idx); + { + int prefix_len = *prefix++; + while (prefix_len--) { dst[idx++] = *prefix++; } + } + { + const int t = type; + int i = 0; + if (t <= BROTLI_TRANSFORM_OMIT_LAST_9) { + len -= t; + } else if (t >= BROTLI_TRANSFORM_OMIT_FIRST_1 + && t <= BROTLI_TRANSFORM_OMIT_FIRST_9) { + int skip = t - (BROTLI_TRANSFORM_OMIT_FIRST_1 - 1); + word += skip; + len -= skip; + } + while (i < len) { dst[idx++] = word[i++]; } + if (t == BROTLI_TRANSFORM_UPPERCASE_FIRST) { + ToUpperCase(&dst[idx - len]); + } else if (t == BROTLI_TRANSFORM_UPPERCASE_ALL) { + uint8_t* uppercase = &dst[idx - len]; + while (len > 0) { + int step = ToUpperCase(uppercase); + uppercase += step; + len -= step; + } + } else if (t == BROTLI_TRANSFORM_SHIFT_FIRST) { + uint16_t param = (uint16_t)(transforms->params[transform_idx * 2] + + (transforms->params[transform_idx * 2 + 1] << 8u)); + Shift(&dst[idx - len], len, param); + } else if (t == BROTLI_TRANSFORM_SHIFT_ALL) { + uint16_t param = (uint16_t)(transforms->params[transform_idx * 2] + + (transforms->params[transform_idx * 2 + 1] << 8u)); + uint8_t* shift = &dst[idx - len]; + while (len > 0) { + int step = Shift(shift, len, param); + shift += step; + len -= step; + } + } + } + { + int suffix_len = *suffix++; + while (suffix_len--) { dst[idx++] = *suffix++; } + return idx; + } +} + +#if defined(__cplusplus) || defined(c_plusplus) +} /* extern "C" */ +#endif diff --git a/Sources/CBrotliDec/common/transform.h b/Sources/CBrotliDec/common/transform.h new file mode 100644 index 0000000..c6176d8 --- /dev/null +++ b/Sources/CBrotliDec/common/transform.h @@ -0,0 +1,84 @@ +/* transforms is a part of ABI, but not API. + + It means that there are some functions that are supposed to be in "common" + library, but header itself is not placed into include/brotli. This way, + aforementioned functions will be available only to brotli internals. + */ + +#ifndef BROTLI_COMMON_TRANSFORM_H_ +#define BROTLI_COMMON_TRANSFORM_H_ + +#include "platform.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +enum BrotliWordTransformType { + BROTLI_TRANSFORM_IDENTITY = 0, + BROTLI_TRANSFORM_OMIT_LAST_1 = 1, + BROTLI_TRANSFORM_OMIT_LAST_2 = 2, + BROTLI_TRANSFORM_OMIT_LAST_3 = 3, + BROTLI_TRANSFORM_OMIT_LAST_4 = 4, + BROTLI_TRANSFORM_OMIT_LAST_5 = 5, + BROTLI_TRANSFORM_OMIT_LAST_6 = 6, + BROTLI_TRANSFORM_OMIT_LAST_7 = 7, + BROTLI_TRANSFORM_OMIT_LAST_8 = 8, + BROTLI_TRANSFORM_OMIT_LAST_9 = 9, + BROTLI_TRANSFORM_UPPERCASE_FIRST = 10, + BROTLI_TRANSFORM_UPPERCASE_ALL = 11, + BROTLI_TRANSFORM_OMIT_FIRST_1 = 12, + BROTLI_TRANSFORM_OMIT_FIRST_2 = 13, + BROTLI_TRANSFORM_OMIT_FIRST_3 = 14, + BROTLI_TRANSFORM_OMIT_FIRST_4 = 15, + BROTLI_TRANSFORM_OMIT_FIRST_5 = 16, + BROTLI_TRANSFORM_OMIT_FIRST_6 = 17, + BROTLI_TRANSFORM_OMIT_FIRST_7 = 18, + BROTLI_TRANSFORM_OMIT_FIRST_8 = 19, + BROTLI_TRANSFORM_OMIT_FIRST_9 = 20, + BROTLI_TRANSFORM_SHIFT_FIRST = 21, + BROTLI_TRANSFORM_SHIFT_ALL = 22, + BROTLI_NUM_TRANSFORM_TYPES /* Counts transforms, not a transform itself. */ +}; + +#define BROTLI_TRANSFORMS_MAX_CUT_OFF BROTLI_TRANSFORM_OMIT_LAST_9 + +typedef struct BrotliTransforms { + uint16_t prefix_suffix_size; + /* Last character must be null, so prefix_suffix_size must be at least 1. */ + const uint8_t* prefix_suffix; + const uint16_t* prefix_suffix_map; + uint32_t num_transforms; + /* Each entry is a [prefix_id, transform, suffix_id] triplet. */ + const uint8_t* transforms; + /* Shift for BROTLI_TRANSFORM_SHIFT_FIRST and BROTLI_TRANSFORM_SHIFT_ALL, + must be NULL if and only if no such transforms are present. */ + const uint8_t* params; + /* Indices of transforms like ["", BROTLI_TRANSFORM_OMIT_LAST_#, ""]. + 0-th element corresponds to ["", BROTLI_TRANSFORM_IDENTITY, ""]. + -1, if cut-off transform does not exist. */ + int16_t cutOffTransforms[BROTLI_TRANSFORMS_MAX_CUT_OFF + 1]; +} BrotliTransforms; + +/* T is BrotliTransforms*; result is uint8_t. */ +#define BROTLI_TRANSFORM_PREFIX_ID(T, I) ((T)->transforms[((I) * 3) + 0]) +#define BROTLI_TRANSFORM_TYPE(T, I) ((T)->transforms[((I) * 3) + 1]) +#define BROTLI_TRANSFORM_SUFFIX_ID(T, I) ((T)->transforms[((I) * 3) + 2]) + +/* T is BrotliTransforms*; result is const uint8_t*. */ +#define BROTLI_TRANSFORM_PREFIX(T, I) (&(T)->prefix_suffix[ \ + (T)->prefix_suffix_map[BROTLI_TRANSFORM_PREFIX_ID(T, I)]]) +#define BROTLI_TRANSFORM_SUFFIX(T, I) (&(T)->prefix_suffix[ \ + (T)->prefix_suffix_map[BROTLI_TRANSFORM_SUFFIX_ID(T, I)]]) + +BROTLI_COMMON_API const BrotliTransforms* BrotliGetTransforms(void); + +BROTLI_COMMON_API int BrotliTransformDictionaryWord( + uint8_t* dst, const uint8_t* word, int len, + const BrotliTransforms* transforms, int transform_idx); + +#if defined(__cplusplus) || defined(c_plusplus) +} /* extern "C" */ +#endif + +#endif /* BROTLI_COMMON_TRANSFORM_H_ */ diff --git a/Sources/CBrotliDec/common/version.h b/Sources/CBrotliDec/common/version.h new file mode 100644 index 0000000..0d6fcc5 --- /dev/null +++ b/Sources/CBrotliDec/common/version.h @@ -0,0 +1,51 @@ +/* Copyright 2016 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +/* Version definition. */ + +#ifndef BROTLI_COMMON_VERSION_H_ +#define BROTLI_COMMON_VERSION_H_ + +/* Compose 3 components into a single number. In a hexadecimal representation + B and C components occupy exactly 3 digits. */ +#define BROTLI_MAKE_HEX_VERSION(A, B, C) ((A << 24) | (B << 12) | C) + +/* Those macros should only be used when library is compiled together with + the client. If library is dynamically linked, use BrotliDecoderVersion and + BrotliEncoderVersion methods. */ + +#define BROTLI_VERSION_MAJOR 1 +#define BROTLI_VERSION_MINOR 2 +#define BROTLI_VERSION_PATCH 0 + +#define BROTLI_VERSION BROTLI_MAKE_HEX_VERSION( \ + BROTLI_VERSION_MAJOR, BROTLI_VERSION_MINOR, BROTLI_VERSION_PATCH) + +/* This macro is used by build system to produce Libtool-friendly soname. See + https://www.gnu.org/software/libtool/manual/html_node/Libtool-versioning.html + Version evolution rules: + - interfaces added (or change is compatible) -> current+1:0:age+1 + - interfaces removed (or changed is incompatible) -> current+1:0:0 + - interfaces not changed -> current:revision+1:age + */ + +#define BROTLI_ABI_CURRENT 3 +#define BROTLI_ABI_REVISION 0 +#define BROTLI_ABI_AGE 2 + +#if BROTLI_VERSION_MAJOR != (BROTLI_ABI_CURRENT - BROTLI_ABI_AGE) +#error ABI/API version inconsistency +#endif + +#if BROTLI_VERSION_MINOR != BROTLI_ABI_AGE +#error ABI/API version inconsistency +#endif + +#if BROTLI_VERSION_PATCH != BROTLI_ABI_REVISION +#error ABI/API version inconsistency +#endif + +#endif /* BROTLI_COMMON_VERSION_H_ */ diff --git a/Sources/CBrotliDec/dec/bit_reader.c b/Sources/CBrotliDec/dec/bit_reader.c new file mode 100644 index 0000000..fae034f --- /dev/null +++ b/Sources/CBrotliDec/dec/bit_reader.c @@ -0,0 +1,77 @@ +/* Copyright 2013 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +/* Bit reading helpers */ + +#include "bit_reader.h" + +#include "../common/platform.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +const BROTLI_MODEL("small") +brotli_reg_t kBrotliBitMask[33] = { 0x00000000, + 0x00000001, 0x00000003, 0x00000007, 0x0000000F, + 0x0000001F, 0x0000003F, 0x0000007F, 0x000000FF, + 0x000001FF, 0x000003FF, 0x000007FF, 0x00000FFF, + 0x00001FFF, 0x00003FFF, 0x00007FFF, 0x0000FFFF, + 0x0001FFFF, 0x0003FFFF, 0x0007FFFF, 0x000FFFFF, + 0x001FFFFF, 0x003FFFFF, 0x007FFFFF, 0x00FFFFFF, + 0x01FFFFFF, 0x03FFFFFF, 0x07FFFFFF, 0x0FFFFFFF, + 0x1FFFFFFF, 0x3FFFFFFF, 0x7FFFFFFF, 0xFFFFFFFF +}; + +void BrotliInitBitReader(BrotliBitReader* const br) { + br->val_ = 0; + br->bit_pos_ = 0; +} + +BROTLI_BOOL BrotliWarmupBitReader(BrotliBitReader* const br) { + size_t aligned_read_mask = (sizeof(br->val_) >> 1) - 1; + /* Fixing alignment after unaligned BrotliFillWindow would result accumulator + overflow. If unalignment is caused by BrotliSafeReadBits, then there is + enough space in accumulator to fix alignment. */ + if (BROTLI_UNALIGNED_READ_FAST) { + aligned_read_mask = 0; + } + if (BrotliGetAvailableBits(br) == 0) { + br->val_ = 0; + if (!BrotliPullByte(br)) { + return BROTLI_FALSE; + } + } + + while ((((size_t)br->next_in) & aligned_read_mask) != 0) { + if (!BrotliPullByte(br)) { + /* If we consumed all the input, we don't care about the alignment. */ + return BROTLI_TRUE; + } + } + return BROTLI_TRUE; +} + +BROTLI_BOOL BrotliSafeReadBits32Slow(BrotliBitReader* const br, + brotli_reg_t n_bits, brotli_reg_t* val) { + brotli_reg_t low_val; + brotli_reg_t high_val; + BrotliBitReaderState memento; + BROTLI_DCHECK(n_bits <= 32); + BROTLI_DCHECK(n_bits > 24); + BrotliBitReaderSaveState(br, &memento); + if (!BrotliSafeReadBits(br, 16, &low_val) || + !BrotliSafeReadBits(br, n_bits - 16, &high_val)) { + BrotliBitReaderRestoreState(br, &memento); + return BROTLI_FALSE; + } + *val = low_val | (high_val << 16); + return BROTLI_TRUE; +} + +#if defined(__cplusplus) || defined(c_plusplus) +} /* extern "C" */ +#endif diff --git a/Sources/CBrotliDec/dec/bit_reader.h b/Sources/CBrotliDec/dec/bit_reader.h new file mode 100644 index 0000000..ef6b047 --- /dev/null +++ b/Sources/CBrotliDec/dec/bit_reader.h @@ -0,0 +1,419 @@ +/* Copyright 2013 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +/* Bit reading helpers */ + +#ifndef BROTLI_DEC_BIT_READER_H_ +#define BROTLI_DEC_BIT_READER_H_ + +#include "../common/constants.h" +#include "../common/platform.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +#define BROTLI_SHORT_FILL_BIT_WINDOW_READ (sizeof(brotli_reg_t) >> 1) + +/* 162 bits + 7 bytes */ +#define BROTLI_FAST_INPUT_SLACK 28 + +BROTLI_INTERNAL extern const brotli_reg_t kBrotliBitMask[33]; + +static BROTLI_INLINE brotli_reg_t BitMask(brotli_reg_t n) { + if (BROTLI_IS_CONSTANT(n) || BROTLI_HAS_UBFX) { + /* Masking with this expression turns to a single + "Unsigned Bit Field Extract" UBFX instruction on ARM. */ + return ~(~((brotli_reg_t)0) << n); + } else { + return kBrotliBitMask[n]; + } +} + +typedef struct { + brotli_reg_t val_; /* pre-fetched bits */ + brotli_reg_t bit_pos_; /* current bit-reading position in val_ */ + const uint8_t* next_in; /* the byte we're reading from */ + const uint8_t* guard_in; /* position from which "fast-path" is prohibited */ + const uint8_t* last_in; /* == next_in + avail_in */ +} BrotliBitReader; + +typedef struct { + brotli_reg_t val_; + brotli_reg_t bit_pos_; + const uint8_t* next_in; + size_t avail_in; +} BrotliBitReaderState; + +/* Initializes the BrotliBitReader fields. */ +BROTLI_INTERNAL void BrotliInitBitReader(BrotliBitReader* br); + +/* Ensures that accumulator is not empty. + May consume up to sizeof(brotli_reg_t) - 1 bytes of input. + Returns BROTLI_FALSE if data is required but there is no input available. + For !BROTLI_UNALIGNED_READ_FAST this function also prepares bit reader for + aligned reading. */ +BROTLI_INTERNAL BROTLI_BOOL BrotliWarmupBitReader(BrotliBitReader* br); + +/* Fallback for BrotliSafeReadBits32. Extracted as noninlined method to unburden + the main code-path. Never called for RFC brotli streams, required only for + "large-window" mode and other extensions. */ +BROTLI_INTERNAL BROTLI_NOINLINE BROTLI_BOOL BrotliSafeReadBits32Slow( + BrotliBitReader* br, brotli_reg_t n_bits, brotli_reg_t* val); + +static BROTLI_INLINE size_t +BrotliBitReaderGetAvailIn(BrotliBitReader* const br) { + return (size_t)(br->last_in - br->next_in); +} + +static BROTLI_INLINE void BrotliBitReaderSaveState( + BrotliBitReader* const from, BrotliBitReaderState* to) { + to->val_ = from->val_; + to->bit_pos_ = from->bit_pos_; + to->next_in = from->next_in; + to->avail_in = BrotliBitReaderGetAvailIn(from); +} + +static BROTLI_INLINE void BrotliBitReaderSetInput( + BrotliBitReader* const br, const uint8_t* next_in, size_t avail_in) { + br->next_in = next_in; + br->last_in = (avail_in == 0) ? next_in : (next_in + avail_in); + if (avail_in + 1 > BROTLI_FAST_INPUT_SLACK) { + br->guard_in = next_in + (avail_in + 1 - BROTLI_FAST_INPUT_SLACK); + } else { + br->guard_in = next_in; + } +} + +static BROTLI_INLINE void BrotliBitReaderRestoreState( + BrotliBitReader* const to, BrotliBitReaderState* from) { + to->val_ = from->val_; + to->bit_pos_ = from->bit_pos_; + to->next_in = from->next_in; + BrotliBitReaderSetInput(to, from->next_in, from->avail_in); +} + +static BROTLI_INLINE brotli_reg_t BrotliGetAvailableBits( + const BrotliBitReader* br) { + return br->bit_pos_; +} + +/* Returns amount of unread bytes the bit reader still has buffered from the + BrotliInput, including whole bytes in br->val_. Result is capped with + maximal ring-buffer size (larger number won't be utilized anyway). */ +static BROTLI_INLINE size_t BrotliGetRemainingBytes(BrotliBitReader* br) { + static const size_t kCap = (size_t)1 << BROTLI_LARGE_MAX_WBITS; + size_t avail_in = BrotliBitReaderGetAvailIn(br); + if (avail_in > kCap) return kCap; + return avail_in + (BrotliGetAvailableBits(br) >> 3); +} + +/* Checks if there is at least |num| bytes left in the input ring-buffer + (excluding the bits remaining in br->val_). */ +static BROTLI_INLINE BROTLI_BOOL BrotliCheckInputAmount( + BrotliBitReader* const br) { + return TO_BROTLI_BOOL(br->next_in < br->guard_in); +} + +/* Load more bits into accumulator. */ +static BROTLI_INLINE brotli_reg_t BrotliBitReaderLoadBits(brotli_reg_t val, + brotli_reg_t new_bits, + brotli_reg_t count, + brotli_reg_t offset) { + BROTLI_DCHECK( + !((val >> offset) & ~new_bits & ~(~((brotli_reg_t)0) << count))); + (void)count; + return val | (new_bits << offset); +} + +/* Guarantees that there are at least |n_bits| + 1 bits in accumulator. + Precondition: accumulator contains at least 1 bit. + |n_bits| should be in the range [1..24] for regular build. For portable + non-64-bit little-endian build only 16 bits are safe to request. */ +static BROTLI_INLINE void BrotliFillBitWindow( + BrotliBitReader* const br, brotli_reg_t n_bits) { +#if (BROTLI_64_BITS) + if (BROTLI_UNALIGNED_READ_FAST && BROTLI_IS_CONSTANT(n_bits) && + (n_bits <= 8)) { + brotli_reg_t bit_pos = br->bit_pos_; + if (bit_pos <= 8) { + br->val_ = BrotliBitReaderLoadBits(br->val_, + BROTLI_UNALIGNED_LOAD64LE(br->next_in), 56, bit_pos); + br->bit_pos_ = bit_pos + 56; + br->next_in += 7; + } + } else if (BROTLI_UNALIGNED_READ_FAST && BROTLI_IS_CONSTANT(n_bits) && + (n_bits <= 16)) { + brotli_reg_t bit_pos = br->bit_pos_; + if (bit_pos <= 16) { + br->val_ = BrotliBitReaderLoadBits(br->val_, + BROTLI_UNALIGNED_LOAD64LE(br->next_in), 48, bit_pos); + br->bit_pos_ = bit_pos + 48; + br->next_in += 6; + } + } else { + brotli_reg_t bit_pos = br->bit_pos_; + if (bit_pos <= 32) { + br->val_ = BrotliBitReaderLoadBits(br->val_, + (uint64_t)BROTLI_UNALIGNED_LOAD32LE(br->next_in), 32, bit_pos); + br->bit_pos_ = bit_pos + 32; + br->next_in += BROTLI_SHORT_FILL_BIT_WINDOW_READ; + } + } +#else + if (BROTLI_UNALIGNED_READ_FAST && BROTLI_IS_CONSTANT(n_bits) && + (n_bits <= 8)) { + brotli_reg_t bit_pos = br->bit_pos_; + if (bit_pos <= 8) { + br->val_ = BrotliBitReaderLoadBits(br->val_, + BROTLI_UNALIGNED_LOAD32LE(br->next_in), 24, bit_pos); + br->bit_pos_ = bit_pos + 24; + br->next_in += 3; + } + } else { + brotli_reg_t bit_pos = br->bit_pos_; + if (bit_pos <= 16) { + br->val_ = BrotliBitReaderLoadBits(br->val_, + (uint32_t)BROTLI_UNALIGNED_LOAD16LE(br->next_in), 16, bit_pos); + br->bit_pos_ = bit_pos + 16; + br->next_in += BROTLI_SHORT_FILL_BIT_WINDOW_READ; + } + } +#endif +} + +/* Mostly like BrotliFillBitWindow, but guarantees only 16 bits and reads no + more than BROTLI_SHORT_FILL_BIT_WINDOW_READ bytes of input. */ +static BROTLI_INLINE void BrotliFillBitWindow16(BrotliBitReader* const br) { + BrotliFillBitWindow(br, 17); +} + +/* Tries to pull one byte of input to accumulator. + Returns BROTLI_FALSE if there is no input available. */ +static BROTLI_INLINE BROTLI_BOOL BrotliPullByte(BrotliBitReader* const br) { + if (br->next_in == br->last_in) { + return BROTLI_FALSE; + } + br->val_ = BrotliBitReaderLoadBits(br->val_, + (brotli_reg_t)*br->next_in, 8, br->bit_pos_); + br->bit_pos_ += 8; + ++br->next_in; + return BROTLI_TRUE; +} + +/* Returns currently available bits. + The number of valid bits could be calculated by BrotliGetAvailableBits. */ +static BROTLI_INLINE brotli_reg_t BrotliGetBitsUnmasked( + BrotliBitReader* const br) { + return br->val_; +} + +/* Like BrotliGetBits, but does not mask the result. + The result contains at least 16 valid bits. */ +static BROTLI_INLINE brotli_reg_t BrotliGet16BitsUnmasked( + BrotliBitReader* const br) { + BrotliFillBitWindow(br, 16); + return (brotli_reg_t)BrotliGetBitsUnmasked(br); +} + +/* Returns the specified number of bits from |br| without advancing bit + position. */ +static BROTLI_INLINE brotli_reg_t BrotliGetBits( + BrotliBitReader* const br, brotli_reg_t n_bits) { + BrotliFillBitWindow(br, n_bits); + return BrotliGetBitsUnmasked(br) & BitMask(n_bits); +} + +/* Tries to peek the specified amount of bits. Returns BROTLI_FALSE, if there + is not enough input. */ +static BROTLI_INLINE BROTLI_BOOL BrotliSafeGetBits( + BrotliBitReader* const br, brotli_reg_t n_bits, brotli_reg_t* val) { + while (BrotliGetAvailableBits(br) < n_bits) { + if (!BrotliPullByte(br)) { + return BROTLI_FALSE; + } + } + *val = BrotliGetBitsUnmasked(br) & BitMask(n_bits); + return BROTLI_TRUE; +} + +/* Advances the bit pos by |n_bits|. */ +static BROTLI_INLINE void BrotliDropBits( + BrotliBitReader* const br, brotli_reg_t n_bits) { + br->bit_pos_ -= n_bits; + br->val_ >>= n_bits; +} + +/* Make sure that there are no spectre bits in accumulator. + This is important for the cases when some bytes are skipped + (i.e. never placed into accumulator). */ +static BROTLI_INLINE void BrotliBitReaderNormalize(BrotliBitReader* br) { + /* Actually, it is enough to normalize when br->bit_pos_ == 0 */ + if (br->bit_pos_ < (sizeof(brotli_reg_t) << 3u)) { + br->val_ &= (((brotli_reg_t)1) << br->bit_pos_) - 1; + } +} + +static BROTLI_INLINE void BrotliBitReaderUnload(BrotliBitReader* br) { + brotli_reg_t unused_bytes = BrotliGetAvailableBits(br) >> 3; + brotli_reg_t unused_bits = unused_bytes << 3; + br->next_in = + (unused_bytes == 0) ? br->next_in : (br->next_in - unused_bytes); + br->bit_pos_ -= unused_bits; + BrotliBitReaderNormalize(br); +} + +/* Reads the specified number of bits from |br| and advances the bit pos. + Precondition: accumulator MUST contain at least |n_bits|. */ +static BROTLI_INLINE void BrotliTakeBits(BrotliBitReader* const br, + brotli_reg_t n_bits, + brotli_reg_t* val) { + *val = BrotliGetBitsUnmasked(br) & BitMask(n_bits); + BROTLI_LOG(("[BrotliTakeBits] %d %d %d val: %6x\n", + (int)BrotliBitReaderGetAvailIn(br), (int)br->bit_pos_, + (int)n_bits, (int)*val)); + BrotliDropBits(br, n_bits); +} + +/* Reads the specified number of bits from |br| and advances the bit pos. + Assumes that there is enough input to perform BrotliFillBitWindow. + Up to 24 bits are allowed to be requested from this method. */ +static BROTLI_INLINE brotli_reg_t BrotliReadBits24( + BrotliBitReader* const br, brotli_reg_t n_bits) { + BROTLI_DCHECK(n_bits <= 24); + if (BROTLI_64_BITS || (n_bits <= 16)) { + brotli_reg_t val; + BrotliFillBitWindow(br, n_bits); + BrotliTakeBits(br, n_bits, &val); + return val; + } else { + brotli_reg_t low_val; + brotli_reg_t high_val; + BrotliFillBitWindow(br, 16); + BrotliTakeBits(br, 16, &low_val); + BrotliFillBitWindow(br, 8); + BrotliTakeBits(br, n_bits - 16, &high_val); + return low_val | (high_val << 16); + } +} + +/* Same as BrotliReadBits24, but allows reading up to 32 bits. */ +static BROTLI_INLINE brotli_reg_t BrotliReadBits32( + BrotliBitReader* const br, brotli_reg_t n_bits) { + BROTLI_DCHECK(n_bits <= 32); + if (BROTLI_64_BITS || (n_bits <= 16)) { + brotli_reg_t val; + BrotliFillBitWindow(br, n_bits); + BrotliTakeBits(br, n_bits, &val); + return val; + } else { + brotli_reg_t low_val; + brotli_reg_t high_val; + BrotliFillBitWindow(br, 16); + BrotliTakeBits(br, 16, &low_val); + BrotliFillBitWindow(br, 16); + BrotliTakeBits(br, n_bits - 16, &high_val); + return low_val | (high_val << 16); + } +} + +/* Tries to read the specified amount of bits. Returns BROTLI_FALSE, if there + is not enough input. |n_bits| MUST be positive. + Up to 24 bits are allowed to be requested from this method. */ +static BROTLI_INLINE BROTLI_BOOL BrotliSafeReadBits( + BrotliBitReader* const br, brotli_reg_t n_bits, brotli_reg_t* val) { + BROTLI_DCHECK(n_bits <= 24); + while (BrotliGetAvailableBits(br) < n_bits) { + if (!BrotliPullByte(br)) { + return BROTLI_FALSE; + } + } + BrotliTakeBits(br, n_bits, val); + return BROTLI_TRUE; +} + +/* Same as BrotliSafeReadBits, but allows reading up to 32 bits. */ +static BROTLI_INLINE BROTLI_BOOL BrotliSafeReadBits32( + BrotliBitReader* const br, brotli_reg_t n_bits, brotli_reg_t* val) { + BROTLI_DCHECK(n_bits <= 32); + if (BROTLI_64_BITS || (n_bits <= 24)) { + while (BrotliGetAvailableBits(br) < n_bits) { + if (!BrotliPullByte(br)) { + return BROTLI_FALSE; + } + } + BrotliTakeBits(br, n_bits, val); + return BROTLI_TRUE; + } else { + return BrotliSafeReadBits32Slow(br, n_bits, val); + } +} + +/* Advances the bit reader position to the next byte boundary and verifies + that any skipped bits are set to zero. */ +static BROTLI_INLINE BROTLI_BOOL BrotliJumpToByteBoundary(BrotliBitReader* br) { + brotli_reg_t pad_bits_count = BrotliGetAvailableBits(br) & 0x7; + brotli_reg_t pad_bits = 0; + if (pad_bits_count != 0) { + BrotliTakeBits(br, pad_bits_count, &pad_bits); + } + BrotliBitReaderNormalize(br); + return TO_BROTLI_BOOL(pad_bits == 0); +} + +static BROTLI_INLINE void BrotliDropBytes(BrotliBitReader* br, size_t num) { + /* Check detour is legal: accumulator must to be empty. */ + BROTLI_DCHECK(br->bit_pos_ == 0); + BROTLI_DCHECK(br->val_ == 0); + br->next_in += num; +} + +/* Copies remaining input bytes stored in the bit reader to the output. Value + |num| may not be larger than BrotliGetRemainingBytes. The bit reader must be + warmed up again after this. */ +static BROTLI_INLINE void BrotliCopyBytes(uint8_t* dest, + BrotliBitReader* br, size_t num) { + while (BrotliGetAvailableBits(br) >= 8 && num > 0) { + *dest = (uint8_t)BrotliGetBitsUnmasked(br); + BrotliDropBits(br, 8); + ++dest; + --num; + } + BrotliBitReaderNormalize(br); + if (num > 0) { + memcpy(dest, br->next_in, num); + BrotliDropBytes(br, num); + } +} + +BROTLI_UNUSED_FUNCTION void BrotliBitReaderSuppressUnusedFunctions(void) { + BROTLI_UNUSED(&BrotliBitReaderSuppressUnusedFunctions); + + BROTLI_UNUSED(&BrotliBitReaderGetAvailIn); + BROTLI_UNUSED(&BrotliBitReaderLoadBits); + BROTLI_UNUSED(&BrotliBitReaderRestoreState); + BROTLI_UNUSED(&BrotliBitReaderSaveState); + BROTLI_UNUSED(&BrotliBitReaderSetInput); + BROTLI_UNUSED(&BrotliBitReaderUnload); + BROTLI_UNUSED(&BrotliCheckInputAmount); + BROTLI_UNUSED(&BrotliCopyBytes); + BROTLI_UNUSED(&BrotliFillBitWindow16); + BROTLI_UNUSED(&BrotliGet16BitsUnmasked); + BROTLI_UNUSED(&BrotliGetBits); + BROTLI_UNUSED(&BrotliGetRemainingBytes); + BROTLI_UNUSED(&BrotliJumpToByteBoundary); + BROTLI_UNUSED(&BrotliReadBits24); + BROTLI_UNUSED(&BrotliReadBits32); + BROTLI_UNUSED(&BrotliSafeGetBits); + BROTLI_UNUSED(&BrotliSafeReadBits); + BROTLI_UNUSED(&BrotliSafeReadBits32); +} + +#if defined(__cplusplus) || defined(c_plusplus) +} /* extern "C" */ +#endif + +#endif /* BROTLI_DEC_BIT_READER_H_ */ diff --git a/Sources/CBrotliDec/dec/decode.c b/Sources/CBrotliDec/dec/decode.c new file mode 100644 index 0000000..e87e7f5 --- /dev/null +++ b/Sources/CBrotliDec/dec/decode.c @@ -0,0 +1,2964 @@ +/* Copyright 2013 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +#include + +#include "../common/constants.h" +#include "../common/context.h" +#include "../common/dictionary.h" +#include "../common/platform.h" +#include "../common/shared_dictionary_internal.h" +#include "../common/transform.h" +#include "../common/version.h" +#include "bit_reader.h" +#include "huffman.h" +#include "prefix.h" +#include "state.h" +#include "static_init.h" + +#if defined(BROTLI_TARGET_NEON) +#include +#endif + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +#define BROTLI_FAILURE(CODE) (BROTLI_DUMP(), CODE) + +#define BROTLI_LOG_UINT(name) \ + BROTLI_LOG(("[%s] %s = %lu\n", __func__, #name, (unsigned long)(name))) +#define BROTLI_LOG_ARRAY_INDEX(array_name, idx) \ + BROTLI_LOG(("[%s] %s[%lu] = %lu\n", __func__, #array_name, \ + (unsigned long)(idx), (unsigned long)array_name[idx])) + +#define HUFFMAN_TABLE_BITS 8U +#define HUFFMAN_TABLE_MASK 0xFF + +/* We need the slack region for the following reasons: + - doing up to two 16-byte copies for fast backward copying + - inserting transformed dictionary word: + 255 prefix + 32 base + 255 suffix */ +static const brotli_reg_t kRingBufferWriteAheadSlack = 542; + +static const BROTLI_MODEL("small") +uint8_t kCodeLengthCodeOrder[BROTLI_CODE_LENGTH_CODES] = { + 1, 2, 3, 4, 0, 5, 17, 6, 16, 7, 8, 9, 10, 11, 12, 13, 14, 15, +}; + +/* Static prefix code for the complex code length code lengths. */ +static const BROTLI_MODEL("small") +uint8_t kCodeLengthPrefixLength[16] = { + 2, 2, 2, 3, 2, 2, 2, 4, 2, 2, 2, 3, 2, 2, 2, 4, +}; + +static const BROTLI_MODEL("small") +uint8_t kCodeLengthPrefixValue[16] = { + 0, 4, 3, 2, 0, 4, 3, 1, 0, 4, 3, 2, 0, 4, 3, 5, +}; + +BROTLI_BOOL BrotliDecoderSetParameter( + BrotliDecoderState* state, BrotliDecoderParameter p, uint32_t value) { + if (state->state != BROTLI_STATE_UNINITED) return BROTLI_FALSE; + switch (p) { + case BROTLI_DECODER_PARAM_DISABLE_RING_BUFFER_REALLOCATION: + state->canny_ringbuffer_allocation = !!value ? 0 : 1; + return BROTLI_TRUE; + + case BROTLI_DECODER_PARAM_LARGE_WINDOW: + state->large_window = TO_BROTLI_BOOL(!!value); + return BROTLI_TRUE; + + default: return BROTLI_FALSE; + } +} + +BrotliDecoderState* BrotliDecoderCreateInstance( + brotli_alloc_func alloc_func, brotli_free_func free_func, void* opaque) { + BrotliDecoderState* state = 0; + if (!BrotliDecoderEnsureStaticInit()) { + BROTLI_DUMP(); + return 0; + } + if (!alloc_func && !free_func) { + state = (BrotliDecoderState*)malloc(sizeof(BrotliDecoderState)); + } else if (alloc_func && free_func) { + state = (BrotliDecoderState*)alloc_func(opaque, sizeof(BrotliDecoderState)); + } + if (state == 0) { + BROTLI_DUMP(); + return 0; + } + if (!BrotliDecoderStateInit(state, alloc_func, free_func, opaque)) { + BROTLI_DUMP(); + if (!alloc_func && !free_func) { + free(state); + } else if (alloc_func && free_func) { + free_func(opaque, state); + } + return 0; + } + return state; +} + +/* Deinitializes and frees BrotliDecoderState instance. */ +void BrotliDecoderDestroyInstance(BrotliDecoderState* state) { + if (!state) { + return; + } else { + brotli_free_func free_func = state->free_func; + void* opaque = state->memory_manager_opaque; + BrotliDecoderStateCleanup(state); + free_func(opaque, state); + } +} + +/* Saves error code and converts it to BrotliDecoderResult. */ +static BROTLI_NOINLINE BrotliDecoderResult SaveErrorCode( + BrotliDecoderState* s, BrotliDecoderErrorCode e, size_t consumed_input) { + s->error_code = (int)e; + s->used_input += consumed_input; + if ((s->buffer_length != 0) && (s->br.next_in == s->br.last_in)) { + /* If internal buffer is depleted at last, reset it. */ + s->buffer_length = 0; + } + switch (e) { + case BROTLI_DECODER_SUCCESS: + return BROTLI_DECODER_RESULT_SUCCESS; + + case BROTLI_DECODER_NEEDS_MORE_INPUT: + return BROTLI_DECODER_RESULT_NEEDS_MORE_INPUT; + + case BROTLI_DECODER_NEEDS_MORE_OUTPUT: + return BROTLI_DECODER_RESULT_NEEDS_MORE_OUTPUT; + + default: + return BROTLI_DECODER_RESULT_ERROR; + } +} + +/* Decodes WBITS by reading 1 - 7 bits, or 0x11 for "Large Window Brotli". + Precondition: bit-reader accumulator has at least 8 bits. */ +static BrotliDecoderErrorCode DecodeWindowBits(BrotliDecoderState* s, + BrotliBitReader* br) { + brotli_reg_t n; + BROTLI_BOOL large_window = s->large_window; + s->large_window = BROTLI_FALSE; + BrotliTakeBits(br, 1, &n); + if (n == 0) { + s->window_bits = 16; + return BROTLI_DECODER_SUCCESS; + } + BrotliTakeBits(br, 3, &n); + if (n != 0) { + s->window_bits = (17u + n) & 63u; + return BROTLI_DECODER_SUCCESS; + } + BrotliTakeBits(br, 3, &n); + if (n == 1) { + if (large_window) { + BrotliTakeBits(br, 1, &n); + if (n == 1) { + return BROTLI_FAILURE(BROTLI_DECODER_ERROR_FORMAT_WINDOW_BITS); + } + s->large_window = BROTLI_TRUE; + return BROTLI_DECODER_SUCCESS; + } else { + return BROTLI_FAILURE(BROTLI_DECODER_ERROR_FORMAT_WINDOW_BITS); + } + } + if (n != 0) { + s->window_bits = (8u + n) & 63u; + return BROTLI_DECODER_SUCCESS; + } + s->window_bits = 17; + return BROTLI_DECODER_SUCCESS; +} + +static BROTLI_INLINE void memmove16(uint8_t* dst, uint8_t* src) { +#if defined(BROTLI_TARGET_NEON) + vst1q_u8(dst, vld1q_u8(src)); +#else + uint32_t buffer[4]; + memcpy(buffer, src, 16); + memcpy(dst, buffer, 16); +#endif +} + +/* Decodes a number in the range [0..255], by reading 1 - 11 bits. */ +static BROTLI_NOINLINE BrotliDecoderErrorCode DecodeVarLenUint8( + BrotliDecoderState* s, BrotliBitReader* br, brotli_reg_t* value) { + brotli_reg_t bits; + switch (s->substate_decode_uint8) { + case BROTLI_STATE_DECODE_UINT8_NONE: + if (BROTLI_PREDICT_FALSE(!BrotliSafeReadBits(br, 1, &bits))) { + return BROTLI_DECODER_NEEDS_MORE_INPUT; + } + if (bits == 0) { + *value = 0; + return BROTLI_DECODER_SUCCESS; + } + /* Fall through. */ + + case BROTLI_STATE_DECODE_UINT8_SHORT: + if (BROTLI_PREDICT_FALSE(!BrotliSafeReadBits(br, 3, &bits))) { + s->substate_decode_uint8 = BROTLI_STATE_DECODE_UINT8_SHORT; + return BROTLI_DECODER_NEEDS_MORE_INPUT; + } + if (bits == 0) { + *value = 1; + s->substate_decode_uint8 = BROTLI_STATE_DECODE_UINT8_NONE; + return BROTLI_DECODER_SUCCESS; + } + /* Use output value as a temporary storage. It MUST be persisted. */ + *value = bits; + /* Fall through. */ + + case BROTLI_STATE_DECODE_UINT8_LONG: + if (BROTLI_PREDICT_FALSE(!BrotliSafeReadBits(br, *value, &bits))) { + s->substate_decode_uint8 = BROTLI_STATE_DECODE_UINT8_LONG; + return BROTLI_DECODER_NEEDS_MORE_INPUT; + } + *value = ((brotli_reg_t)1U << *value) + bits; + s->substate_decode_uint8 = BROTLI_STATE_DECODE_UINT8_NONE; + return BROTLI_DECODER_SUCCESS; + + default: + return + BROTLI_FAILURE(BROTLI_DECODER_ERROR_UNREACHABLE); /* COV_NF_LINE */ + } +} + +/* Decodes a metablock length and flags by reading 2 - 31 bits. */ +static BrotliDecoderErrorCode BROTLI_NOINLINE DecodeMetaBlockLength( + BrotliDecoderState* s, BrotliBitReader* br) { + brotli_reg_t bits; + int i; + for (;;) { + switch (s->substate_metablock_header) { + case BROTLI_STATE_METABLOCK_HEADER_NONE: + if (!BrotliSafeReadBits(br, 1, &bits)) { + return BROTLI_DECODER_NEEDS_MORE_INPUT; + } + s->is_last_metablock = bits ? 1 : 0; + s->meta_block_remaining_len = 0; + s->is_uncompressed = 0; + s->is_metadata = 0; + if (!s->is_last_metablock) { + s->substate_metablock_header = BROTLI_STATE_METABLOCK_HEADER_NIBBLES; + break; + } + s->substate_metablock_header = BROTLI_STATE_METABLOCK_HEADER_EMPTY; + /* Fall through. */ + + case BROTLI_STATE_METABLOCK_HEADER_EMPTY: + if (!BrotliSafeReadBits(br, 1, &bits)) { + return BROTLI_DECODER_NEEDS_MORE_INPUT; + } + if (bits) { + s->substate_metablock_header = BROTLI_STATE_METABLOCK_HEADER_NONE; + return BROTLI_DECODER_SUCCESS; + } + s->substate_metablock_header = BROTLI_STATE_METABLOCK_HEADER_NIBBLES; + /* Fall through. */ + + case BROTLI_STATE_METABLOCK_HEADER_NIBBLES: + if (!BrotliSafeReadBits(br, 2, &bits)) { + return BROTLI_DECODER_NEEDS_MORE_INPUT; + } + s->size_nibbles = (uint8_t)(bits + 4); + s->loop_counter = 0; + if (bits == 3) { + s->is_metadata = 1; + s->substate_metablock_header = BROTLI_STATE_METABLOCK_HEADER_RESERVED; + break; + } + s->substate_metablock_header = BROTLI_STATE_METABLOCK_HEADER_SIZE; + /* Fall through. */ + + case BROTLI_STATE_METABLOCK_HEADER_SIZE: + i = s->loop_counter; + for (; i < (int)s->size_nibbles; ++i) { + if (!BrotliSafeReadBits(br, 4, &bits)) { + s->loop_counter = i; + return BROTLI_DECODER_NEEDS_MORE_INPUT; + } + if (i + 1 == (int)s->size_nibbles && s->size_nibbles > 4 && + bits == 0) { + return BROTLI_FAILURE(BROTLI_DECODER_ERROR_FORMAT_EXUBERANT_NIBBLE); + } + s->meta_block_remaining_len |= (int)(bits << (i * 4)); + } + s->substate_metablock_header = + BROTLI_STATE_METABLOCK_HEADER_UNCOMPRESSED; + /* Fall through. */ + + case BROTLI_STATE_METABLOCK_HEADER_UNCOMPRESSED: + if (!s->is_last_metablock) { + if (!BrotliSafeReadBits(br, 1, &bits)) { + return BROTLI_DECODER_NEEDS_MORE_INPUT; + } + s->is_uncompressed = bits ? 1 : 0; + } + ++s->meta_block_remaining_len; + s->substate_metablock_header = BROTLI_STATE_METABLOCK_HEADER_NONE; + return BROTLI_DECODER_SUCCESS; + + case BROTLI_STATE_METABLOCK_HEADER_RESERVED: + if (!BrotliSafeReadBits(br, 1, &bits)) { + return BROTLI_DECODER_NEEDS_MORE_INPUT; + } + if (bits != 0) { + return BROTLI_FAILURE(BROTLI_DECODER_ERROR_FORMAT_RESERVED); + } + s->substate_metablock_header = BROTLI_STATE_METABLOCK_HEADER_BYTES; + /* Fall through. */ + + case BROTLI_STATE_METABLOCK_HEADER_BYTES: + if (!BrotliSafeReadBits(br, 2, &bits)) { + return BROTLI_DECODER_NEEDS_MORE_INPUT; + } + if (bits == 0) { + s->substate_metablock_header = BROTLI_STATE_METABLOCK_HEADER_NONE; + return BROTLI_DECODER_SUCCESS; + } + s->size_nibbles = (uint8_t)bits; + s->substate_metablock_header = BROTLI_STATE_METABLOCK_HEADER_METADATA; + /* Fall through. */ + + case BROTLI_STATE_METABLOCK_HEADER_METADATA: + i = s->loop_counter; + for (; i < (int)s->size_nibbles; ++i) { + if (!BrotliSafeReadBits(br, 8, &bits)) { + s->loop_counter = i; + return BROTLI_DECODER_NEEDS_MORE_INPUT; + } + if (i + 1 == (int)s->size_nibbles && s->size_nibbles > 1 && + bits == 0) { + return BROTLI_FAILURE( + BROTLI_DECODER_ERROR_FORMAT_EXUBERANT_META_NIBBLE); + } + s->meta_block_remaining_len |= (int)(bits << (i * 8)); + } + ++s->meta_block_remaining_len; + s->substate_metablock_header = BROTLI_STATE_METABLOCK_HEADER_NONE; + return BROTLI_DECODER_SUCCESS; + + default: + return + BROTLI_FAILURE(BROTLI_DECODER_ERROR_UNREACHABLE); /* COV_NF_LINE */ + } + } +} + +/* Decodes the Huffman code. + This method doesn't read data from the bit reader, BUT drops the amount of + bits that correspond to the decoded symbol. + bits MUST contain at least 15 (BROTLI_HUFFMAN_MAX_CODE_LENGTH) valid bits. */ +static BROTLI_INLINE brotli_reg_t DecodeSymbol(brotli_reg_t bits, + const HuffmanCode* table, + BrotliBitReader* br) { + BROTLI_HC_MARK_TABLE_FOR_FAST_LOAD(table); + BROTLI_HC_ADJUST_TABLE_INDEX(table, bits & HUFFMAN_TABLE_MASK); + if (BROTLI_HC_FAST_LOAD_BITS(table) > HUFFMAN_TABLE_BITS) { + brotli_reg_t nbits = BROTLI_HC_FAST_LOAD_BITS(table) - HUFFMAN_TABLE_BITS; + BrotliDropBits(br, HUFFMAN_TABLE_BITS); + BROTLI_HC_ADJUST_TABLE_INDEX(table, + BROTLI_HC_FAST_LOAD_VALUE(table) + + ((bits >> HUFFMAN_TABLE_BITS) & BitMask(nbits))); + } + BrotliDropBits(br, BROTLI_HC_FAST_LOAD_BITS(table)); + return BROTLI_HC_FAST_LOAD_VALUE(table); +} + +/* Reads and decodes the next Huffman code from bit-stream. + This method peeks 16 bits of input and drops 0 - 15 of them. */ +static BROTLI_INLINE brotli_reg_t ReadSymbol(const HuffmanCode* table, + BrotliBitReader* br) { + return DecodeSymbol(BrotliGet16BitsUnmasked(br), table, br); +} + +/* Same as DecodeSymbol, but it is known that there is less than 15 bits of + input are currently available. */ +static BROTLI_NOINLINE BROTLI_BOOL SafeDecodeSymbol( + const HuffmanCode* table, BrotliBitReader* br, brotli_reg_t* result) { + brotli_reg_t val; + brotli_reg_t available_bits = BrotliGetAvailableBits(br); + BROTLI_HC_MARK_TABLE_FOR_FAST_LOAD(table); + if (available_bits == 0) { + if (BROTLI_HC_FAST_LOAD_BITS(table) == 0) { + *result = BROTLI_HC_FAST_LOAD_VALUE(table); + return BROTLI_TRUE; + } + return BROTLI_FALSE; /* No valid bits at all. */ + } + val = BrotliGetBitsUnmasked(br); + BROTLI_HC_ADJUST_TABLE_INDEX(table, val & HUFFMAN_TABLE_MASK); + if (BROTLI_HC_FAST_LOAD_BITS(table) <= HUFFMAN_TABLE_BITS) { + if (BROTLI_HC_FAST_LOAD_BITS(table) <= available_bits) { + BrotliDropBits(br, BROTLI_HC_FAST_LOAD_BITS(table)); + *result = BROTLI_HC_FAST_LOAD_VALUE(table); + return BROTLI_TRUE; + } else { + return BROTLI_FALSE; /* Not enough bits for the first level. */ + } + } + if (available_bits <= HUFFMAN_TABLE_BITS) { + return BROTLI_FALSE; /* Not enough bits to move to the second level. */ + } + + /* Speculatively drop HUFFMAN_TABLE_BITS. */ + val = (val & BitMask(BROTLI_HC_FAST_LOAD_BITS(table))) >> HUFFMAN_TABLE_BITS; + available_bits -= HUFFMAN_TABLE_BITS; + BROTLI_HC_ADJUST_TABLE_INDEX(table, BROTLI_HC_FAST_LOAD_VALUE(table) + val); + if (available_bits < BROTLI_HC_FAST_LOAD_BITS(table)) { + return BROTLI_FALSE; /* Not enough bits for the second level. */ + } + + BrotliDropBits(br, HUFFMAN_TABLE_BITS + BROTLI_HC_FAST_LOAD_BITS(table)); + *result = BROTLI_HC_FAST_LOAD_VALUE(table); + return BROTLI_TRUE; +} + +static BROTLI_INLINE BROTLI_BOOL SafeReadSymbol( + const HuffmanCode* table, BrotliBitReader* br, brotli_reg_t* result) { + brotli_reg_t val; + if (BROTLI_PREDICT_TRUE(BrotliSafeGetBits(br, 15, &val))) { + *result = DecodeSymbol(val, table, br); + return BROTLI_TRUE; + } + return SafeDecodeSymbol(table, br, result); +} + +/* Makes a look-up in first level Huffman table. Peeks 8 bits. */ +static BROTLI_INLINE void PreloadSymbol(int safe, + const HuffmanCode* table, + BrotliBitReader* br, + brotli_reg_t* bits, + brotli_reg_t* value) { + if (safe) { + return; + } + BROTLI_HC_MARK_TABLE_FOR_FAST_LOAD(table); + BROTLI_HC_ADJUST_TABLE_INDEX(table, BrotliGetBits(br, HUFFMAN_TABLE_BITS)); + *bits = BROTLI_HC_FAST_LOAD_BITS(table); + *value = BROTLI_HC_FAST_LOAD_VALUE(table); +} + +/* Decodes the next Huffman code using data prepared by PreloadSymbol. + Reads 0 - 15 bits. Also peeks 8 following bits. */ +static BROTLI_INLINE brotli_reg_t ReadPreloadedSymbol(const HuffmanCode* table, + BrotliBitReader* br, + brotli_reg_t* bits, + brotli_reg_t* value) { + brotli_reg_t result = *value; + if (BROTLI_PREDICT_FALSE(*bits > HUFFMAN_TABLE_BITS)) { + brotli_reg_t val = BrotliGet16BitsUnmasked(br); + const HuffmanCode* ext = table + (val & HUFFMAN_TABLE_MASK) + *value; + brotli_reg_t mask = BitMask((*bits - HUFFMAN_TABLE_BITS)); + BROTLI_HC_MARK_TABLE_FOR_FAST_LOAD(ext); + BrotliDropBits(br, HUFFMAN_TABLE_BITS); + BROTLI_HC_ADJUST_TABLE_INDEX(ext, (val >> HUFFMAN_TABLE_BITS) & mask); + BrotliDropBits(br, BROTLI_HC_FAST_LOAD_BITS(ext)); + result = BROTLI_HC_FAST_LOAD_VALUE(ext); + } else { + BrotliDropBits(br, *bits); + } + PreloadSymbol(0, table, br, bits, value); + return result; +} + +/* Reads up to limit symbols from br and copies them into ringbuffer, + starting from pos. Caller must ensure that there is enough space + for the write. Returns the amount of symbols actually copied. */ +static BROTLI_INLINE int BrotliCopyPreloadedSymbolsToU8(const HuffmanCode* table, + BrotliBitReader* br, + brotli_reg_t* bits, + brotli_reg_t* value, + uint8_t* ringbuffer, + int pos, + const int limit) { + /* Calculate range where CheckInputAmount is always true. + Start with the number of bytes we can read. */ + int64_t new_lim = br->guard_in - br->next_in; + /* Convert to bits, since symbols use variable number of bits. */ + new_lim *= 8; + /* At most 15 bits per symbol, so this is safe. */ + new_lim /= 15; + const int kMaximalOverread = 4; + int pos_limit = limit; + int copies = 0; + if ((new_lim - kMaximalOverread) <= limit) { + // Safe cast, since new_lim is already < num_steps + pos_limit = (int)(new_lim - kMaximalOverread); + } + if (pos_limit < 0) { + pos_limit = 0; + } + copies = pos_limit; + pos_limit += pos; + /* Fast path, caller made sure it is safe to write, + we verified that is is safe to read. */ + for (; pos < pos_limit; pos++) { + BROTLI_DCHECK(BrotliCheckInputAmount(br)); + ringbuffer[pos] = (uint8_t)ReadPreloadedSymbol(table, br, bits, value); + BROTLI_LOG_ARRAY_INDEX(ringbuffer, pos); + } + /* Do the remainder, caller made sure it is safe to write, + we need to bverify that it is safe to read. */ + while (BrotliCheckInputAmount(br) && copies < limit) { + ringbuffer[pos] = (uint8_t)ReadPreloadedSymbol(table, br, bits, value); + BROTLI_LOG_ARRAY_INDEX(ringbuffer, pos); + pos++; + copies++; + } + return copies; +} + +static BROTLI_INLINE brotli_reg_t Log2Floor(brotli_reg_t x) { + brotli_reg_t result = 0; + while (x) { + x >>= 1; + ++result; + } + return result; +} + +/* Reads (s->symbol + 1) symbols. + Totally 1..4 symbols are read, 1..11 bits each. + The list of symbols MUST NOT contain duplicates. */ +static BrotliDecoderErrorCode ReadSimpleHuffmanSymbols( + brotli_reg_t alphabet_size_max, brotli_reg_t alphabet_size_limit, + BrotliDecoderState* s) { + /* max_bits == 1..11; symbol == 0..3; 1..44 bits will be read. */ + BrotliBitReader* br = &s->br; + BrotliMetablockHeaderArena* h = &s->arena.header; + brotli_reg_t max_bits = Log2Floor(alphabet_size_max - 1); + brotli_reg_t i = h->sub_loop_counter; + brotli_reg_t num_symbols = h->symbol; + while (i <= num_symbols) { + brotli_reg_t v; + if (BROTLI_PREDICT_FALSE(!BrotliSafeReadBits(br, max_bits, &v))) { + h->sub_loop_counter = i; + h->substate_huffman = BROTLI_STATE_HUFFMAN_SIMPLE_READ; + return BROTLI_DECODER_NEEDS_MORE_INPUT; + } + if (v >= alphabet_size_limit) { + return + BROTLI_FAILURE(BROTLI_DECODER_ERROR_FORMAT_SIMPLE_HUFFMAN_ALPHABET); + } + h->symbols_lists_array[i] = (uint16_t)v; + BROTLI_LOG_UINT(h->symbols_lists_array[i]); + ++i; + } + + for (i = 0; i < num_symbols; ++i) { + brotli_reg_t k = i + 1; + for (; k <= num_symbols; ++k) { + if (h->symbols_lists_array[i] == h->symbols_lists_array[k]) { + return BROTLI_FAILURE(BROTLI_DECODER_ERROR_FORMAT_SIMPLE_HUFFMAN_SAME); + } + } + } + + return BROTLI_DECODER_SUCCESS; +} + +/* Process single decoded symbol code length: + A) reset the repeat variable + B) remember code length (if it is not 0) + C) extend corresponding index-chain + D) reduce the Huffman space + E) update the histogram */ +static BROTLI_INLINE void ProcessSingleCodeLength(brotli_reg_t code_len, + brotli_reg_t* symbol, brotli_reg_t* repeat, brotli_reg_t* space, + brotli_reg_t* prev_code_len, uint16_t* symbol_lists, + uint16_t* code_length_histo, int* next_symbol) { + *repeat = 0; + if (code_len != 0) { /* code_len == 1..15 */ + symbol_lists[next_symbol[code_len]] = (uint16_t)(*symbol); + next_symbol[code_len] = (int)(*symbol); + *prev_code_len = code_len; + *space -= 32768U >> code_len; + code_length_histo[code_len]++; + BROTLI_LOG(("[ReadHuffmanCode] code_length[%d] = %d\n", + (int)*symbol, (int)code_len)); + } + (*symbol)++; +} + +/* Process repeated symbol code length. + A) Check if it is the extension of previous repeat sequence; if the decoded + value is not BROTLI_REPEAT_PREVIOUS_CODE_LENGTH, then it is a new + symbol-skip + B) Update repeat variable + C) Check if operation is feasible (fits alphabet) + D) For each symbol do the same operations as in ProcessSingleCodeLength + + PRECONDITION: code_len == BROTLI_REPEAT_PREVIOUS_CODE_LENGTH or + code_len == BROTLI_REPEAT_ZERO_CODE_LENGTH */ +static BROTLI_INLINE void ProcessRepeatedCodeLength(brotli_reg_t code_len, + brotli_reg_t repeat_delta, brotli_reg_t alphabet_size, brotli_reg_t* symbol, + brotli_reg_t* repeat, brotli_reg_t* space, brotli_reg_t* prev_code_len, + brotli_reg_t* repeat_code_len, uint16_t* symbol_lists, + uint16_t* code_length_histo, int* next_symbol) { + brotli_reg_t old_repeat; + brotli_reg_t extra_bits = 3; /* for BROTLI_REPEAT_ZERO_CODE_LENGTH */ + brotli_reg_t new_len = 0; /* for BROTLI_REPEAT_ZERO_CODE_LENGTH */ + if (code_len == BROTLI_REPEAT_PREVIOUS_CODE_LENGTH) { + new_len = *prev_code_len; + extra_bits = 2; + } + if (*repeat_code_len != new_len) { + *repeat = 0; + *repeat_code_len = new_len; + } + old_repeat = *repeat; + if (*repeat > 0) { + *repeat -= 2; + *repeat <<= extra_bits; + } + *repeat += repeat_delta + 3U; + repeat_delta = *repeat - old_repeat; + if (*symbol + repeat_delta > alphabet_size) { + BROTLI_DUMP(); + *symbol = alphabet_size; + *space = 0xFFFFF; + return; + } + BROTLI_LOG(("[ReadHuffmanCode] code_length[%d..%d] = %d\n", + (int)*symbol, (int)(*symbol + repeat_delta - 1), (int)*repeat_code_len)); + if (*repeat_code_len != 0) { + brotli_reg_t last = *symbol + repeat_delta; + int next = next_symbol[*repeat_code_len]; + do { + symbol_lists[next] = (uint16_t)*symbol; + next = (int)*symbol; + } while (++(*symbol) != last); + next_symbol[*repeat_code_len] = next; + *space -= repeat_delta << (15 - *repeat_code_len); + code_length_histo[*repeat_code_len] = + (uint16_t)(code_length_histo[*repeat_code_len] + repeat_delta); + } else { + *symbol += repeat_delta; + } +} + +/* Reads and decodes symbol codelengths. */ +static BrotliDecoderErrorCode ReadSymbolCodeLengths( + brotli_reg_t alphabet_size, BrotliDecoderState* s) { + BrotliBitReader* br = &s->br; + BrotliMetablockHeaderArena* h = &s->arena.header; + brotli_reg_t symbol = h->symbol; + brotli_reg_t repeat = h->repeat; + brotli_reg_t space = h->space; + brotli_reg_t prev_code_len = h->prev_code_len; + brotli_reg_t repeat_code_len = h->repeat_code_len; + uint16_t* symbol_lists = h->symbol_lists; + uint16_t* code_length_histo = h->code_length_histo; + int* next_symbol = h->next_symbol; + if (!BrotliWarmupBitReader(br)) { + return BROTLI_DECODER_NEEDS_MORE_INPUT; + } + while (symbol < alphabet_size && space > 0) { + const HuffmanCode* p = h->table; + brotli_reg_t code_len; + BROTLI_HC_MARK_TABLE_FOR_FAST_LOAD(p); + if (!BrotliCheckInputAmount(br)) { + h->symbol = symbol; + h->repeat = repeat; + h->prev_code_len = prev_code_len; + h->repeat_code_len = repeat_code_len; + h->space = space; + return BROTLI_DECODER_NEEDS_MORE_INPUT; + } + BrotliFillBitWindow16(br); + BROTLI_HC_ADJUST_TABLE_INDEX(p, BrotliGetBitsUnmasked(br) & + BitMask(BROTLI_HUFFMAN_MAX_CODE_LENGTH_CODE_LENGTH)); + BrotliDropBits(br, BROTLI_HC_FAST_LOAD_BITS(p)); /* Use 1..5 bits. */ + code_len = BROTLI_HC_FAST_LOAD_VALUE(p); /* code_len == 0..17 */ + if (code_len < BROTLI_REPEAT_PREVIOUS_CODE_LENGTH) { + ProcessSingleCodeLength(code_len, &symbol, &repeat, &space, + &prev_code_len, symbol_lists, code_length_histo, next_symbol); + } else { /* code_len == 16..17, extra_bits == 2..3 */ + brotli_reg_t extra_bits = + (code_len == BROTLI_REPEAT_PREVIOUS_CODE_LENGTH) ? 2 : 3; + brotli_reg_t repeat_delta = + BrotliGetBitsUnmasked(br) & BitMask(extra_bits); + BrotliDropBits(br, extra_bits); + ProcessRepeatedCodeLength(code_len, repeat_delta, alphabet_size, + &symbol, &repeat, &space, &prev_code_len, &repeat_code_len, + symbol_lists, code_length_histo, next_symbol); + } + } + h->space = space; + return BROTLI_DECODER_SUCCESS; +} + +static BrotliDecoderErrorCode SafeReadSymbolCodeLengths( + brotli_reg_t alphabet_size, BrotliDecoderState* s) { + BrotliBitReader* br = &s->br; + BrotliMetablockHeaderArena* h = &s->arena.header; + BROTLI_BOOL get_byte = BROTLI_FALSE; + while (h->symbol < alphabet_size && h->space > 0) { + const HuffmanCode* p = h->table; + brotli_reg_t code_len; + brotli_reg_t available_bits; + brotli_reg_t bits = 0; + BROTLI_HC_MARK_TABLE_FOR_FAST_LOAD(p); + if (get_byte && !BrotliPullByte(br)) return BROTLI_DECODER_NEEDS_MORE_INPUT; + get_byte = BROTLI_FALSE; + available_bits = BrotliGetAvailableBits(br); + if (available_bits != 0) { + bits = (uint32_t)BrotliGetBitsUnmasked(br); + } + BROTLI_HC_ADJUST_TABLE_INDEX(p, + bits & BitMask(BROTLI_HUFFMAN_MAX_CODE_LENGTH_CODE_LENGTH)); + if (BROTLI_HC_FAST_LOAD_BITS(p) > available_bits) { + get_byte = BROTLI_TRUE; + continue; + } + code_len = BROTLI_HC_FAST_LOAD_VALUE(p); /* code_len == 0..17 */ + if (code_len < BROTLI_REPEAT_PREVIOUS_CODE_LENGTH) { + BrotliDropBits(br, BROTLI_HC_FAST_LOAD_BITS(p)); + ProcessSingleCodeLength(code_len, &h->symbol, &h->repeat, &h->space, + &h->prev_code_len, h->symbol_lists, h->code_length_histo, + h->next_symbol); + } else { /* code_len == 16..17, extra_bits == 2..3 */ + brotli_reg_t extra_bits = code_len - 14U; + brotli_reg_t repeat_delta = (bits >> BROTLI_HC_FAST_LOAD_BITS(p)) & + BitMask(extra_bits); + if (available_bits < BROTLI_HC_FAST_LOAD_BITS(p) + extra_bits) { + get_byte = BROTLI_TRUE; + continue; + } + BrotliDropBits(br, BROTLI_HC_FAST_LOAD_BITS(p) + extra_bits); + ProcessRepeatedCodeLength(code_len, repeat_delta, alphabet_size, + &h->symbol, &h->repeat, &h->space, &h->prev_code_len, + &h->repeat_code_len, h->symbol_lists, h->code_length_histo, + h->next_symbol); + } + } + return BROTLI_DECODER_SUCCESS; +} + +/* Reads and decodes 15..18 codes using static prefix code. + Each code is 2..4 bits long. In total 30..72 bits are used. */ +static BrotliDecoderErrorCode ReadCodeLengthCodeLengths(BrotliDecoderState* s) { + BrotliBitReader* br = &s->br; + BrotliMetablockHeaderArena* h = &s->arena.header; + brotli_reg_t num_codes = h->repeat; + brotli_reg_t space = h->space; + brotli_reg_t i = h->sub_loop_counter; + for (; i < BROTLI_CODE_LENGTH_CODES; ++i) { + const uint8_t code_len_idx = kCodeLengthCodeOrder[i]; + brotli_reg_t ix; + brotli_reg_t v; + if (BROTLI_PREDICT_FALSE(!BrotliSafeGetBits(br, 4, &ix))) { + brotli_reg_t available_bits = BrotliGetAvailableBits(br); + if (available_bits != 0) { + ix = BrotliGetBitsUnmasked(br) & 0xF; + } else { + ix = 0; + } + if (kCodeLengthPrefixLength[ix] > available_bits) { + h->sub_loop_counter = i; + h->repeat = num_codes; + h->space = space; + h->substate_huffman = BROTLI_STATE_HUFFMAN_COMPLEX; + return BROTLI_DECODER_NEEDS_MORE_INPUT; + } + } + v = kCodeLengthPrefixValue[ix]; + BrotliDropBits(br, kCodeLengthPrefixLength[ix]); + h->code_length_code_lengths[code_len_idx] = (uint8_t)v; + BROTLI_LOG_ARRAY_INDEX(h->code_length_code_lengths, code_len_idx); + if (v != 0) { + space = space - (32U >> v); + ++num_codes; + ++h->code_length_histo[v]; + if (space - 1U >= 32U) { + /* space is 0 or wrapped around. */ + break; + } + } + } + if (!(num_codes == 1 || space == 0)) { + return BROTLI_FAILURE(BROTLI_DECODER_ERROR_FORMAT_CL_SPACE); + } + return BROTLI_DECODER_SUCCESS; +} + +/* Decodes the Huffman tables. + There are 2 scenarios: + A) Huffman code contains only few symbols (1..4). Those symbols are read + directly; their code lengths are defined by the number of symbols. + For this scenario 4 - 49 bits will be read. + + B) 2-phase decoding: + B.1) Small Huffman table is decoded; it is specified with code lengths + encoded with predefined entropy code. 32 - 74 bits are used. + B.2) Decoded table is used to decode code lengths of symbols in resulting + Huffman table. In worst case 3520 bits are read. */ +static BrotliDecoderErrorCode ReadHuffmanCode(brotli_reg_t alphabet_size_max, + brotli_reg_t alphabet_size_limit, + HuffmanCode* table, + brotli_reg_t* opt_table_size, + BrotliDecoderState* s) { + BrotliBitReader* br = &s->br; + BrotliMetablockHeaderArena* h = &s->arena.header; + /* State machine. */ + for (;;) { + switch (h->substate_huffman) { + case BROTLI_STATE_HUFFMAN_NONE: + if (!BrotliSafeReadBits(br, 2, &h->sub_loop_counter)) { + return BROTLI_DECODER_NEEDS_MORE_INPUT; + } + BROTLI_LOG_UINT(h->sub_loop_counter); + /* The value is used as follows: + 1 for simple code; + 0 for no skipping, 2 skips 2 code lengths, 3 skips 3 code lengths */ + if (h->sub_loop_counter != 1) { + h->space = 32; + h->repeat = 0; /* num_codes */ + memset(&h->code_length_histo[0], 0, sizeof(h->code_length_histo[0]) * + (BROTLI_HUFFMAN_MAX_CODE_LENGTH_CODE_LENGTH + 1)); + memset(&h->code_length_code_lengths[0], 0, + sizeof(h->code_length_code_lengths)); + h->substate_huffman = BROTLI_STATE_HUFFMAN_COMPLEX; + continue; + } + /* Fall through. */ + + case BROTLI_STATE_HUFFMAN_SIMPLE_SIZE: + /* Read symbols, codes & code lengths directly. */ + if (!BrotliSafeReadBits(br, 2, &h->symbol)) { /* num_symbols */ + h->substate_huffman = BROTLI_STATE_HUFFMAN_SIMPLE_SIZE; + return BROTLI_DECODER_NEEDS_MORE_INPUT; + } + h->sub_loop_counter = 0; + /* Fall through. */ + + case BROTLI_STATE_HUFFMAN_SIMPLE_READ: { + BrotliDecoderErrorCode result = + ReadSimpleHuffmanSymbols(alphabet_size_max, alphabet_size_limit, s); + if (result != BROTLI_DECODER_SUCCESS) { + return result; + } + } + /* Fall through. */ + + case BROTLI_STATE_HUFFMAN_SIMPLE_BUILD: { + brotli_reg_t table_size; + if (h->symbol == 3) { + brotli_reg_t bits; + if (!BrotliSafeReadBits(br, 1, &bits)) { + h->substate_huffman = BROTLI_STATE_HUFFMAN_SIMPLE_BUILD; + return BROTLI_DECODER_NEEDS_MORE_INPUT; + } + h->symbol += bits; + } + BROTLI_LOG_UINT(h->symbol); + table_size = BrotliBuildSimpleHuffmanTable(table, HUFFMAN_TABLE_BITS, + h->symbols_lists_array, + (uint32_t)h->symbol); + if (opt_table_size) { + *opt_table_size = table_size; + } + h->substate_huffman = BROTLI_STATE_HUFFMAN_NONE; + return BROTLI_DECODER_SUCCESS; + } + + /* Decode Huffman-coded code lengths. */ + case BROTLI_STATE_HUFFMAN_COMPLEX: { + brotli_reg_t i; + BrotliDecoderErrorCode result = ReadCodeLengthCodeLengths(s); + if (result != BROTLI_DECODER_SUCCESS) { + return result; + } + BrotliBuildCodeLengthsHuffmanTable(h->table, + h->code_length_code_lengths, + h->code_length_histo); + memset(&h->code_length_histo[0], 0, sizeof(h->code_length_histo)); + for (i = 0; i <= BROTLI_HUFFMAN_MAX_CODE_LENGTH; ++i) { + h->next_symbol[i] = (int)i - (BROTLI_HUFFMAN_MAX_CODE_LENGTH + 1); + h->symbol_lists[h->next_symbol[i]] = 0xFFFF; + } + + h->symbol = 0; + h->prev_code_len = BROTLI_INITIAL_REPEATED_CODE_LENGTH; + h->repeat = 0; + h->repeat_code_len = 0; + h->space = 32768; + h->substate_huffman = BROTLI_STATE_HUFFMAN_LENGTH_SYMBOLS; + } + /* Fall through. */ + + case BROTLI_STATE_HUFFMAN_LENGTH_SYMBOLS: { + brotli_reg_t table_size; + BrotliDecoderErrorCode result = ReadSymbolCodeLengths( + alphabet_size_limit, s); + if (result == BROTLI_DECODER_NEEDS_MORE_INPUT) { + result = SafeReadSymbolCodeLengths(alphabet_size_limit, s); + } + if (result != BROTLI_DECODER_SUCCESS) { + return result; + } + + if (h->space != 0) { + BROTLI_LOG(("[ReadHuffmanCode] space = %d\n", (int)h->space)); + return BROTLI_FAILURE(BROTLI_DECODER_ERROR_FORMAT_HUFFMAN_SPACE); + } + table_size = BrotliBuildHuffmanTable( + table, HUFFMAN_TABLE_BITS, h->symbol_lists, h->code_length_histo); + if (opt_table_size) { + *opt_table_size = table_size; + } + h->substate_huffman = BROTLI_STATE_HUFFMAN_NONE; + return BROTLI_DECODER_SUCCESS; + } + + default: + return + BROTLI_FAILURE(BROTLI_DECODER_ERROR_UNREACHABLE); /* COV_NF_LINE */ + } + } +} + +/* Decodes a block length by reading 3..39 bits. */ +static BROTLI_INLINE brotli_reg_t ReadBlockLength(const HuffmanCode* table, + BrotliBitReader* br) { + brotli_reg_t code; + brotli_reg_t nbits; + code = ReadSymbol(table, br); + nbits = _kBrotliPrefixCodeRanges[code].nbits; /* nbits == 2..24 */ + return _kBrotliPrefixCodeRanges[code].offset + BrotliReadBits24(br, nbits); +} + +/* WARNING: if state is not BROTLI_STATE_READ_BLOCK_LENGTH_NONE, then + reading can't be continued with ReadBlockLength. */ +static BROTLI_INLINE BROTLI_BOOL SafeReadBlockLength( + BrotliDecoderState* s, brotli_reg_t* result, const HuffmanCode* table, + BrotliBitReader* br) { + brotli_reg_t index; + if (s->substate_read_block_length == BROTLI_STATE_READ_BLOCK_LENGTH_NONE) { + if (!SafeReadSymbol(table, br, &index)) { + return BROTLI_FALSE; + } + } else { + index = s->block_length_index; + } + { + brotli_reg_t bits; + brotli_reg_t nbits = _kBrotliPrefixCodeRanges[index].nbits; + brotli_reg_t offset = _kBrotliPrefixCodeRanges[index].offset; + if (!BrotliSafeReadBits(br, nbits, &bits)) { + s->block_length_index = index; + s->substate_read_block_length = BROTLI_STATE_READ_BLOCK_LENGTH_SUFFIX; + return BROTLI_FALSE; + } + *result = offset + bits; + s->substate_read_block_length = BROTLI_STATE_READ_BLOCK_LENGTH_NONE; + return BROTLI_TRUE; + } +} + +/* Transform: + 1) initialize list L with values 0, 1,... 255 + 2) For each input element X: + 2.1) let Y = L[X] + 2.2) remove X-th element from L + 2.3) prepend Y to L + 2.4) append Y to output + + In most cases max(Y) <= 7, so most of L remains intact. + To reduce the cost of initialization, we reuse L, remember the upper bound + of Y values, and reinitialize only first elements in L. + + Most of input values are 0 and 1. To reduce number of branches, we replace + inner for loop with do-while. */ +static BROTLI_NOINLINE void InverseMoveToFrontTransform( + uint8_t* v, brotli_reg_t v_len, BrotliDecoderState* state) { + /* Reinitialize elements that could have been changed. */ + brotli_reg_t i = 1; + brotli_reg_t upper_bound = state->mtf_upper_bound; + uint32_t* mtf = &state->mtf[1]; /* Make mtf[-1] addressable. */ + uint8_t* mtf_u8 = (uint8_t*)mtf; + /* Load endian-aware constant. */ + const uint8_t b0123[4] = {0, 1, 2, 3}; + uint32_t pattern; + memcpy(&pattern, &b0123, 4); + + /* Initialize list using 4 consequent values pattern. */ + mtf[0] = pattern; + do { + pattern += 0x04040404; /* Advance all 4 values by 4. */ + mtf[i] = pattern; + i++; + } while (i <= upper_bound); + + /* Transform the input. */ + upper_bound = 0; + for (i = 0; i < v_len; ++i) { + int index = v[i]; + uint8_t value = mtf_u8[index]; + upper_bound |= v[i]; + v[i] = value; + mtf_u8[-1] = value; + do { + index--; + mtf_u8[index + 1] = mtf_u8[index]; + } while (index >= 0); + } + /* Remember amount of elements to be reinitialized. */ + state->mtf_upper_bound = upper_bound >> 2; +} + +/* Decodes a series of Huffman table using ReadHuffmanCode function. */ +static BrotliDecoderErrorCode HuffmanTreeGroupDecode( + HuffmanTreeGroup* group, BrotliDecoderState* s) { + BrotliMetablockHeaderArena* h = &s->arena.header; + if (h->substate_tree_group != BROTLI_STATE_TREE_GROUP_LOOP) { + h->next = group->codes; + h->htree_index = 0; + h->substate_tree_group = BROTLI_STATE_TREE_GROUP_LOOP; + } + while (h->htree_index < group->num_htrees) { + brotli_reg_t table_size; + BrotliDecoderErrorCode result = ReadHuffmanCode(group->alphabet_size_max, + group->alphabet_size_limit, h->next, &table_size, s); + if (result != BROTLI_DECODER_SUCCESS) return result; + group->htrees[h->htree_index] = h->next; + h->next += table_size; + ++h->htree_index; + } + h->substate_tree_group = BROTLI_STATE_TREE_GROUP_NONE; + return BROTLI_DECODER_SUCCESS; +} + +/* Decodes a context map. + Decoding is done in 4 phases: + 1) Read auxiliary information (6..16 bits) and allocate memory. + In case of trivial context map, decoding is finished at this phase. + 2) Decode Huffman table using ReadHuffmanCode function. + This table will be used for reading context map items. + 3) Read context map items; "0" values could be run-length encoded. + 4) Optionally, apply InverseMoveToFront transform to the resulting map. */ +static BrotliDecoderErrorCode DecodeContextMap(brotli_reg_t context_map_size, + brotli_reg_t* num_htrees, + uint8_t** context_map_arg, + BrotliDecoderState* s) { + BrotliBitReader* br = &s->br; + BrotliDecoderErrorCode result = BROTLI_DECODER_SUCCESS; + BrotliMetablockHeaderArena* h = &s->arena.header; + + switch ((int)h->substate_context_map) { + case BROTLI_STATE_CONTEXT_MAP_NONE: + result = DecodeVarLenUint8(s, br, num_htrees); + if (result != BROTLI_DECODER_SUCCESS) { + return result; + } + (*num_htrees)++; + h->context_index = 0; + BROTLI_LOG_UINT(context_map_size); + BROTLI_LOG_UINT(*num_htrees); + *context_map_arg = + (uint8_t*)BROTLI_DECODER_ALLOC(s, (size_t)context_map_size); + if (*context_map_arg == 0) { + return BROTLI_FAILURE(BROTLI_DECODER_ERROR_ALLOC_CONTEXT_MAP); + } + if (*num_htrees <= 1) { + memset(*context_map_arg, 0, (size_t)context_map_size); + return BROTLI_DECODER_SUCCESS; + } + h->substate_context_map = BROTLI_STATE_CONTEXT_MAP_READ_PREFIX; + /* Fall through. */ + + case BROTLI_STATE_CONTEXT_MAP_READ_PREFIX: { + brotli_reg_t bits; + /* In next stage ReadHuffmanCode uses at least 4 bits, so it is safe + to peek 4 bits ahead. */ + if (!BrotliSafeGetBits(br, 5, &bits)) { + return BROTLI_DECODER_NEEDS_MORE_INPUT; + } + if ((bits & 1) != 0) { /* Use RLE for zeros. */ + h->max_run_length_prefix = (bits >> 1) + 1; + BrotliDropBits(br, 5); + } else { + h->max_run_length_prefix = 0; + BrotliDropBits(br, 1); + } + BROTLI_LOG_UINT(h->max_run_length_prefix); + h->substate_context_map = BROTLI_STATE_CONTEXT_MAP_HUFFMAN; + } + /* Fall through. */ + + case BROTLI_STATE_CONTEXT_MAP_HUFFMAN: { + brotli_reg_t alphabet_size = *num_htrees + h->max_run_length_prefix; + result = ReadHuffmanCode(alphabet_size, alphabet_size, + h->context_map_table, NULL, s); + if (result != BROTLI_DECODER_SUCCESS) return result; + h->code = 0xFFFF; + h->substate_context_map = BROTLI_STATE_CONTEXT_MAP_DECODE; + } + /* Fall through. */ + + case BROTLI_STATE_CONTEXT_MAP_DECODE: { + brotli_reg_t context_index = h->context_index; + brotli_reg_t max_run_length_prefix = h->max_run_length_prefix; + uint8_t* context_map = *context_map_arg; + brotli_reg_t code = h->code; + BROTLI_BOOL skip_preamble = (code != 0xFFFF); + while (context_index < context_map_size || skip_preamble) { + if (!skip_preamble) { + if (!SafeReadSymbol(h->context_map_table, br, &code)) { + h->code = 0xFFFF; + h->context_index = context_index; + return BROTLI_DECODER_NEEDS_MORE_INPUT; + } + BROTLI_LOG_UINT(code); + + if (code == 0) { + context_map[context_index++] = 0; + continue; + } + if (code > max_run_length_prefix) { + context_map[context_index++] = + (uint8_t)(code - max_run_length_prefix); + continue; + } + } else { + skip_preamble = BROTLI_FALSE; + } + /* RLE sub-stage. */ + { + brotli_reg_t reps; + if (!BrotliSafeReadBits(br, code, &reps)) { + h->code = code; + h->context_index = context_index; + return BROTLI_DECODER_NEEDS_MORE_INPUT; + } + reps += (brotli_reg_t)1U << code; + BROTLI_LOG_UINT(reps); + if (context_index + reps > context_map_size) { + return + BROTLI_FAILURE(BROTLI_DECODER_ERROR_FORMAT_CONTEXT_MAP_REPEAT); + } + do { + context_map[context_index++] = 0; + } while (--reps); + } + } + } + /* Fall through. */ + + case BROTLI_STATE_CONTEXT_MAP_TRANSFORM: { + brotli_reg_t bits; + if (!BrotliSafeReadBits(br, 1, &bits)) { + h->substate_context_map = BROTLI_STATE_CONTEXT_MAP_TRANSFORM; + return BROTLI_DECODER_NEEDS_MORE_INPUT; + } + if (bits != 0) { + InverseMoveToFrontTransform(*context_map_arg, context_map_size, s); + } + h->substate_context_map = BROTLI_STATE_CONTEXT_MAP_NONE; + return BROTLI_DECODER_SUCCESS; + } + + default: + return + BROTLI_FAILURE(BROTLI_DECODER_ERROR_UNREACHABLE); /* COV_NF_LINE */ + } +} + +/* Decodes a command or literal and updates block type ring-buffer. + Reads 3..54 bits. */ +static BROTLI_INLINE BROTLI_BOOL DecodeBlockTypeAndLength( + int safe, BrotliDecoderState* s, int tree_type) { + brotli_reg_t max_block_type = s->num_block_types[tree_type]; + const HuffmanCode* type_tree = &s->block_type_trees[ + tree_type * BROTLI_HUFFMAN_MAX_SIZE_258]; + const HuffmanCode* len_tree = &s->block_len_trees[ + tree_type * BROTLI_HUFFMAN_MAX_SIZE_26]; + BrotliBitReader* br = &s->br; + brotli_reg_t* ringbuffer = &s->block_type_rb[tree_type * 2]; + brotli_reg_t block_type; + if (max_block_type <= 1) { + return BROTLI_FALSE; + } + + /* Read 0..15 + 3..39 bits. */ + if (!safe) { + block_type = ReadSymbol(type_tree, br); + s->block_length[tree_type] = ReadBlockLength(len_tree, br); + } else { + BrotliBitReaderState memento; + BrotliBitReaderSaveState(br, &memento); + if (!SafeReadSymbol(type_tree, br, &block_type)) return BROTLI_FALSE; + if (!SafeReadBlockLength(s, &s->block_length[tree_type], len_tree, br)) { + s->substate_read_block_length = BROTLI_STATE_READ_BLOCK_LENGTH_NONE; + BrotliBitReaderRestoreState(br, &memento); + return BROTLI_FALSE; + } + } + + if (block_type == 1) { + block_type = ringbuffer[1] + 1; + } else if (block_type == 0) { + block_type = ringbuffer[0]; + } else { + block_type -= 2; + } + if (block_type >= max_block_type) { + block_type -= max_block_type; + } + ringbuffer[0] = ringbuffer[1]; + ringbuffer[1] = block_type; + return BROTLI_TRUE; +} + +static BROTLI_INLINE void DetectTrivialLiteralBlockTypes( + BrotliDecoderState* s) { + size_t i; + for (i = 0; i < 8; ++i) s->trivial_literal_contexts[i] = 0; + for (i = 0; i < s->num_block_types[0]; i++) { + size_t offset = i << BROTLI_LITERAL_CONTEXT_BITS; + size_t error = 0; + size_t sample = s->context_map[offset]; + size_t j; + for (j = 0; j < (1u << BROTLI_LITERAL_CONTEXT_BITS);) { + /* NOLINTNEXTLINE(bugprone-macro-repeated-side-effects) */ + BROTLI_REPEAT_4({ error |= s->context_map[offset + j++] ^ sample; }) + } + if (error == 0) { + s->trivial_literal_contexts[i >> 5] |= 1u << (i & 31); + } + } +} + +static BROTLI_INLINE void PrepareLiteralDecoding(BrotliDecoderState* s) { + uint8_t context_mode; + size_t trivial; + brotli_reg_t block_type = s->block_type_rb[1]; + brotli_reg_t context_offset = block_type << BROTLI_LITERAL_CONTEXT_BITS; + s->context_map_slice = s->context_map + context_offset; + trivial = s->trivial_literal_contexts[block_type >> 5]; + s->trivial_literal_context = (trivial >> (block_type & 31)) & 1; + s->literal_htree = s->literal_hgroup.htrees[s->context_map_slice[0]]; + context_mode = s->context_modes[block_type] & 3; + s->context_lookup = BROTLI_CONTEXT_LUT(context_mode); +} + +/* Decodes the block type and updates the state for literal context. + Reads 3..54 bits. */ +static BROTLI_INLINE BROTLI_BOOL DecodeLiteralBlockSwitchInternal( + int safe, BrotliDecoderState* s) { + if (!DecodeBlockTypeAndLength(safe, s, 0)) { + return BROTLI_FALSE; + } + PrepareLiteralDecoding(s); + return BROTLI_TRUE; +} + +static void BROTLI_NOINLINE DecodeLiteralBlockSwitch(BrotliDecoderState* s) { + DecodeLiteralBlockSwitchInternal(0, s); +} + +static BROTLI_BOOL BROTLI_NOINLINE SafeDecodeLiteralBlockSwitch( + BrotliDecoderState* s) { + return DecodeLiteralBlockSwitchInternal(1, s); +} + +/* Block switch for insert/copy length. + Reads 3..54 bits. */ +static BROTLI_INLINE BROTLI_BOOL DecodeCommandBlockSwitchInternal( + int safe, BrotliDecoderState* s) { + if (!DecodeBlockTypeAndLength(safe, s, 1)) { + return BROTLI_FALSE; + } + s->htree_command = s->insert_copy_hgroup.htrees[s->block_type_rb[3]]; + return BROTLI_TRUE; +} + +static void BROTLI_NOINLINE DecodeCommandBlockSwitch(BrotliDecoderState* s) { + DecodeCommandBlockSwitchInternal(0, s); +} + +static BROTLI_BOOL BROTLI_NOINLINE SafeDecodeCommandBlockSwitch( + BrotliDecoderState* s) { + return DecodeCommandBlockSwitchInternal(1, s); +} + +/* Block switch for distance codes. + Reads 3..54 bits. */ +static BROTLI_INLINE BROTLI_BOOL DecodeDistanceBlockSwitchInternal( + int safe, BrotliDecoderState* s) { + if (!DecodeBlockTypeAndLength(safe, s, 2)) { + return BROTLI_FALSE; + } + s->dist_context_map_slice = s->dist_context_map + + (s->block_type_rb[5] << BROTLI_DISTANCE_CONTEXT_BITS); + s->dist_htree_index = s->dist_context_map_slice[s->distance_context]; + return BROTLI_TRUE; +} + +static void BROTLI_NOINLINE DecodeDistanceBlockSwitch(BrotliDecoderState* s) { + DecodeDistanceBlockSwitchInternal(0, s); +} + +static BROTLI_BOOL BROTLI_NOINLINE SafeDecodeDistanceBlockSwitch( + BrotliDecoderState* s) { + return DecodeDistanceBlockSwitchInternal(1, s); +} + +static size_t UnwrittenBytes(const BrotliDecoderState* s, BROTLI_BOOL wrap) { + size_t pos = wrap && s->pos > s->ringbuffer_size ? + (size_t)s->ringbuffer_size : (size_t)(s->pos); + size_t partial_pos_rb = (s->rb_roundtrips * (size_t)s->ringbuffer_size) + pos; + return partial_pos_rb - s->partial_pos_out; +} + +/* Dumps output. + Returns BROTLI_DECODER_NEEDS_MORE_OUTPUT only if there is more output to push + and either ring-buffer is as big as window size, or |force| is true. */ +static BrotliDecoderErrorCode BROTLI_NOINLINE WriteRingBuffer( + BrotliDecoderState* s, size_t* available_out, uint8_t** next_out, + size_t* total_out, BROTLI_BOOL force) { + uint8_t* start = + s->ringbuffer + (s->partial_pos_out & (size_t)s->ringbuffer_mask); + size_t to_write = UnwrittenBytes(s, BROTLI_TRUE); + size_t num_written = *available_out; + if (num_written > to_write) { + num_written = to_write; + } + if (s->meta_block_remaining_len < 0) { + return BROTLI_FAILURE(BROTLI_DECODER_ERROR_FORMAT_BLOCK_LENGTH_1); + } + if (next_out && !*next_out) { + *next_out = start; + } else { + if (next_out) { + memcpy(*next_out, start, num_written); + *next_out += num_written; + } + } + *available_out -= num_written; + BROTLI_LOG_UINT(to_write); + BROTLI_LOG_UINT(num_written); + s->partial_pos_out += num_written; + if (total_out) { + *total_out = s->partial_pos_out; + } + if (num_written < to_write) { + if (s->ringbuffer_size == (1 << s->window_bits) || force) { + return BROTLI_DECODER_NEEDS_MORE_OUTPUT; + } else { + return BROTLI_DECODER_SUCCESS; + } + } + /* Wrap ring buffer only if it has reached its maximal size. */ + if (s->ringbuffer_size == (1 << s->window_bits) && + s->pos >= s->ringbuffer_size) { + s->pos -= s->ringbuffer_size; + s->rb_roundtrips++; + s->should_wrap_ringbuffer = (size_t)s->pos != 0 ? 1 : 0; + } + return BROTLI_DECODER_SUCCESS; +} + +static void BROTLI_NOINLINE WrapRingBuffer(BrotliDecoderState* s) { + if (s->should_wrap_ringbuffer) { + memcpy(s->ringbuffer, s->ringbuffer_end, (size_t)s->pos); + s->should_wrap_ringbuffer = 0; + } +} + +/* Allocates ring-buffer. + + s->ringbuffer_size MUST be updated by BrotliCalculateRingBufferSize before + this function is called. + + Last two bytes of ring-buffer are initialized to 0, so context calculation + could be done uniformly for the first two and all other positions. */ +static BROTLI_BOOL BROTLI_NOINLINE BrotliEnsureRingBuffer( + BrotliDecoderState* s) { + uint8_t* old_ringbuffer = s->ringbuffer; + if (s->ringbuffer_size == s->new_ringbuffer_size) { + return BROTLI_TRUE; + } + + s->ringbuffer = (uint8_t*)BROTLI_DECODER_ALLOC(s, + (size_t)(s->new_ringbuffer_size) + kRingBufferWriteAheadSlack); + if (s->ringbuffer == 0) { + /* Restore previous value. */ + s->ringbuffer = old_ringbuffer; + return BROTLI_FALSE; + } + s->ringbuffer[s->new_ringbuffer_size - 2] = 0; + s->ringbuffer[s->new_ringbuffer_size - 1] = 0; + + if (!!old_ringbuffer) { + memcpy(s->ringbuffer, old_ringbuffer, (size_t)s->pos); + BROTLI_DECODER_FREE(s, old_ringbuffer); + } + + s->ringbuffer_size = s->new_ringbuffer_size; + s->ringbuffer_mask = s->new_ringbuffer_size - 1; + s->ringbuffer_end = s->ringbuffer + s->ringbuffer_size; + + return BROTLI_TRUE; +} + +static BrotliDecoderErrorCode BROTLI_NOINLINE +SkipMetadataBlock(BrotliDecoderState* s) { + BrotliBitReader* br = &s->br; + int nbytes; + + if (s->meta_block_remaining_len == 0) { + return BROTLI_DECODER_SUCCESS; + } + + BROTLI_DCHECK((BrotliGetAvailableBits(br) & 7) == 0); + + /* Drain accumulator. */ + if (BrotliGetAvailableBits(br) >= 8) { + uint8_t buffer[8]; + nbytes = (int)(BrotliGetAvailableBits(br)) >> 3; + BROTLI_DCHECK(nbytes <= 8); + if (nbytes > s->meta_block_remaining_len) { + nbytes = s->meta_block_remaining_len; + } + BrotliCopyBytes(buffer, br, (size_t)nbytes); + if (s->metadata_chunk_func) { + s->metadata_chunk_func(s->metadata_callback_opaque, buffer, + (size_t)nbytes); + } + s->meta_block_remaining_len -= nbytes; + if (s->meta_block_remaining_len == 0) { + return BROTLI_DECODER_SUCCESS; + } + } + + /* Direct access to metadata is possible. */ + nbytes = (int)BrotliGetRemainingBytes(br); + if (nbytes > s->meta_block_remaining_len) { + nbytes = s->meta_block_remaining_len; + } + if (nbytes > 0) { + if (s->metadata_chunk_func) { + s->metadata_chunk_func(s->metadata_callback_opaque, br->next_in, + (size_t)nbytes); + } + BrotliDropBytes(br, (size_t)nbytes); + s->meta_block_remaining_len -= nbytes; + if (s->meta_block_remaining_len == 0) { + return BROTLI_DECODER_SUCCESS; + } + } + + BROTLI_DCHECK(BrotliGetRemainingBytes(br) == 0); + + return BROTLI_DECODER_NEEDS_MORE_INPUT; +} + +static BrotliDecoderErrorCode BROTLI_NOINLINE CopyUncompressedBlockToOutput( + size_t* available_out, uint8_t** next_out, size_t* total_out, + BrotliDecoderState* s) { + /* TODO(eustas): avoid allocation for single uncompressed block. */ + if (!BrotliEnsureRingBuffer(s)) { + return BROTLI_FAILURE(BROTLI_DECODER_ERROR_ALLOC_RING_BUFFER_1); + } + + /* State machine */ + for (;;) { + switch (s->substate_uncompressed) { + case BROTLI_STATE_UNCOMPRESSED_NONE: { + int nbytes = (int)BrotliGetRemainingBytes(&s->br); + if (nbytes > s->meta_block_remaining_len) { + nbytes = s->meta_block_remaining_len; + } + if (s->pos + nbytes > s->ringbuffer_size) { + nbytes = s->ringbuffer_size - s->pos; + } + /* Copy remaining bytes from s->br.buf_ to ring-buffer. */ + BrotliCopyBytes(&s->ringbuffer[s->pos], &s->br, (size_t)nbytes); + s->pos += nbytes; + s->meta_block_remaining_len -= nbytes; + if (s->pos < 1 << s->window_bits) { + if (s->meta_block_remaining_len == 0) { + return BROTLI_DECODER_SUCCESS; + } + return BROTLI_DECODER_NEEDS_MORE_INPUT; + } + s->substate_uncompressed = BROTLI_STATE_UNCOMPRESSED_WRITE; + } + /* Fall through. */ + + case BROTLI_STATE_UNCOMPRESSED_WRITE: { + BrotliDecoderErrorCode result; + result = WriteRingBuffer( + s, available_out, next_out, total_out, BROTLI_FALSE); + if (result != BROTLI_DECODER_SUCCESS) { + return result; + } + if (s->ringbuffer_size == 1 << s->window_bits) { + s->max_distance = s->max_backward_distance; + } + s->substate_uncompressed = BROTLI_STATE_UNCOMPRESSED_NONE; + break; + } + } + } + BROTLI_DCHECK(0); /* Unreachable */ +} + +static BROTLI_BOOL AttachCompoundDictionary( + BrotliDecoderState* state, const uint8_t* data, size_t size) { + BrotliDecoderCompoundDictionary* addon = state->compound_dictionary; + if (state->state != BROTLI_STATE_UNINITED) return BROTLI_FALSE; + if (!addon) { + addon = (BrotliDecoderCompoundDictionary*)BROTLI_DECODER_ALLOC( + state, sizeof(BrotliDecoderCompoundDictionary)); + if (!addon) return BROTLI_FALSE; + addon->num_chunks = 0; + addon->total_size = 0; + addon->br_length = 0; + addon->br_copied = 0; + addon->block_bits = -1; + addon->chunk_offsets[0] = 0; + state->compound_dictionary = addon; + } + if (addon->num_chunks == 15) return BROTLI_FALSE; + addon->chunks[addon->num_chunks] = data; + addon->num_chunks++; + addon->total_size += (int)size; + addon->chunk_offsets[addon->num_chunks] = addon->total_size; + return BROTLI_TRUE; +} + +static void EnsureCompoundDictionaryInitialized(BrotliDecoderState* state) { + BrotliDecoderCompoundDictionary* addon = state->compound_dictionary; + /* 256 = (1 << 8) slots in block map. */ + int block_bits = 8; + int cursor = 0; + int index = 0; + if (addon->block_bits != -1) return; + while (((addon->total_size - 1) >> block_bits) != 0) block_bits++; + block_bits -= 8; + addon->block_bits = block_bits; + while (cursor < addon->total_size) { + while (addon->chunk_offsets[index + 1] < cursor) index++; + addon->block_map[cursor >> block_bits] = (uint8_t)index; + cursor += 1 << block_bits; + } +} + +static BROTLI_BOOL InitializeCompoundDictionaryCopy(BrotliDecoderState* s, + int address, int length) { + BrotliDecoderCompoundDictionary* addon = s->compound_dictionary; + int index; + EnsureCompoundDictionaryInitialized(s); + index = addon->block_map[address >> addon->block_bits]; + while (address >= addon->chunk_offsets[index + 1]) index++; + if (addon->total_size < address + length) return BROTLI_FALSE; + /* Update the recent distances cache. */ + s->dist_rb[s->dist_rb_idx & 3] = s->distance_code; + ++s->dist_rb_idx; + s->meta_block_remaining_len -= length; + addon->br_index = index; + addon->br_offset = address - addon->chunk_offsets[index]; + addon->br_length = length; + addon->br_copied = 0; + return BROTLI_TRUE; +} + +static int GetCompoundDictionarySize(BrotliDecoderState* s) { + return s->compound_dictionary ? s->compound_dictionary->total_size : 0; +} + +static int CopyFromCompoundDictionary(BrotliDecoderState* s, int pos) { + BrotliDecoderCompoundDictionary* addon = s->compound_dictionary; + int orig_pos = pos; + while (addon->br_length != addon->br_copied) { + uint8_t* copy_dst = &s->ringbuffer[pos]; + const uint8_t* copy_src = + addon->chunks[addon->br_index] + addon->br_offset; + int space = s->ringbuffer_size - pos; + int rem_chunk_length = (addon->chunk_offsets[addon->br_index + 1] - + addon->chunk_offsets[addon->br_index]) - addon->br_offset; + int length = addon->br_length - addon->br_copied; + if (length > rem_chunk_length) length = rem_chunk_length; + if (length > space) length = space; + memcpy(copy_dst, copy_src, (size_t)length); + pos += length; + addon->br_offset += length; + addon->br_copied += length; + if (length == rem_chunk_length) { + addon->br_index++; + addon->br_offset = 0; + } + if (pos == s->ringbuffer_size) break; + } + return pos - orig_pos; +} + +BROTLI_BOOL BrotliDecoderAttachDictionary( + BrotliDecoderState* state, BrotliSharedDictionaryType type, + size_t data_size, const uint8_t data[BROTLI_ARRAY_PARAM(data_size)]) { + brotli_reg_t i; + brotli_reg_t num_prefix_before = state->dictionary->num_prefix; + if (state->state != BROTLI_STATE_UNINITED) return BROTLI_FALSE; + if (!BrotliSharedDictionaryAttach(state->dictionary, type, data_size, data)) { + return BROTLI_FALSE; + } + for (i = num_prefix_before; i < state->dictionary->num_prefix; i++) { + if (!AttachCompoundDictionary( + state, state->dictionary->prefix[i], + state->dictionary->prefix_size[i])) { + return BROTLI_FALSE; + } + } + return BROTLI_TRUE; +} + +/* Calculates the smallest feasible ring buffer. + + If we know the data size is small, do not allocate more ring buffer + size than needed to reduce memory usage. + + When this method is called, metablock size and flags MUST be decoded. */ +static void BROTLI_NOINLINE BrotliCalculateRingBufferSize( + BrotliDecoderState* s) { + int window_size = 1 << s->window_bits; + int new_ringbuffer_size = window_size; + /* We need at least 2 bytes of ring buffer size to get the last two + bytes for context from there */ + int min_size = s->ringbuffer_size ? s->ringbuffer_size : 1024; + int output_size; + + /* If maximum is already reached, no further extension is retired. */ + if (s->ringbuffer_size == window_size) { + return; + } + + /* Metadata blocks does not touch ring buffer. */ + if (s->is_metadata) { + return; + } + + if (!s->ringbuffer) { + output_size = 0; + } else { + output_size = s->pos; + } + output_size += s->meta_block_remaining_len; + min_size = min_size < output_size ? output_size : min_size; + + if (!!s->canny_ringbuffer_allocation) { + /* Reduce ring buffer size to save memory when server is unscrupulous. + In worst case memory usage might be 1.5x bigger for a short period of + ring buffer reallocation. */ + while ((new_ringbuffer_size >> 1) >= min_size) { + new_ringbuffer_size >>= 1; + } + } + + s->new_ringbuffer_size = new_ringbuffer_size; +} + +/* Reads 1..256 2-bit context modes. */ +static BrotliDecoderErrorCode ReadContextModes(BrotliDecoderState* s) { + BrotliBitReader* br = &s->br; + int i = s->loop_counter; + + while (i < (int)s->num_block_types[0]) { + brotli_reg_t bits; + if (!BrotliSafeReadBits(br, 2, &bits)) { + s->loop_counter = i; + return BROTLI_DECODER_NEEDS_MORE_INPUT; + } + s->context_modes[i] = (uint8_t)bits; + BROTLI_LOG_ARRAY_INDEX(s->context_modes, i); + i++; + } + return BROTLI_DECODER_SUCCESS; +} + +static BROTLI_INLINE void TakeDistanceFromRingBuffer(BrotliDecoderState* s) { + int offset = s->distance_code - 3; + if (s->distance_code <= 3) { + /* Compensate double distance-ring-buffer roll for dictionary items. */ + s->distance_context = 1 >> s->distance_code; + s->distance_code = s->dist_rb[(s->dist_rb_idx - offset) & 3]; + s->dist_rb_idx -= s->distance_context; + } else { + int index_delta = 3; + int delta; + int base = s->distance_code - 10; + if (s->distance_code < 10) { + base = s->distance_code - 4; + } else { + index_delta = 2; + } + /* Unpack one of six 4-bit values. */ + delta = ((0x605142 >> (4 * base)) & 0xF) - 3; + s->distance_code = s->dist_rb[(s->dist_rb_idx + index_delta) & 0x3] + delta; + if (s->distance_code <= 0) { + /* A huge distance will cause a BROTLI_FAILURE() soon. + This is a little faster than failing here. */ + s->distance_code = 0x7FFFFFFF; + } + } +} + +static BROTLI_INLINE BROTLI_BOOL SafeReadBits( + BrotliBitReader* const br, brotli_reg_t n_bits, brotli_reg_t* val) { + if (n_bits != 0) { + return BrotliSafeReadBits(br, n_bits, val); + } else { + *val = 0; + return BROTLI_TRUE; + } +} + +static BROTLI_INLINE BROTLI_BOOL SafeReadBits32( + BrotliBitReader* const br, brotli_reg_t n_bits, brotli_reg_t* val) { + if (n_bits != 0) { + return BrotliSafeReadBits32(br, n_bits, val); + } else { + *val = 0; + return BROTLI_TRUE; + } +} + +/* + RFC 7932 Section 4 with "..." shortenings and "[]" emendations. + + Each distance ... is represented with a pair ... + The distance code is encoded using a prefix code... The number of extra bits + can be 0..24... Two additional parameters: NPOSTFIX (0..3), and ... + NDIRECT (0..120) ... are encoded in the meta-block header... + + The first 16 distance symbols ... reference past distances... ring buffer ... + Next NDIRECT distance symbols ... represent distances from 1 to NDIRECT... + [For] distance symbols 16 + NDIRECT and greater ... the number of extra bits + ... is given by the following formula: + + [ xcode = dcode - NDIRECT - 16 ] + ndistbits = 1 + [ xcode ] >> (NPOSTFIX + 1) + + ... +*/ + +/* + RFC 7932 Section 9.2 with "..." shortenings and "[]" emendations. + + ... to get the actual value of the parameter NDIRECT, left-shift this + four-bit number by NPOSTFIX bits ... +*/ + +/* Remaining formulas from RFC 7932 Section 4 could be rewritten as following: + + alphabet_size = 16 + NDIRECT + (max_distbits << (NPOSTFIX + 1)) + + half = ((xcode >> NPOSTFIX) & 1) << ndistbits + postfix = xcode & ((1 << NPOSTFIX) - 1) + range_start = 2 * (1 << ndistbits - 1 - 1) + + distance = (range_start + half + extra) << NPOSTFIX + postfix + NDIRECT + 1 + + NB: ndistbits >= 1 -> range_start >= 0 + NB: range_start has factor 2, as the range is covered by 2 "halves" + NB: extra -1 offset in range_start formula covers the absence of + ndistbits = 0 case + NB: when NPOSTFIX = 0, NDIRECT is not greater than 15 + + In other words, xcode has the following binary structure - XXXHPPP: + - XXX represent the number of extra distance bits + - H selects upper / lower range of distances + - PPP represent "postfix" + + "Regular" distance encoding has NPOSTFIX = 0; omitting the postfix part + simplifies distance calculation. + + Using NPOSTFIX > 0 allows cheaper encoding of regular structures, e.g. where + most of distances have the same reminder of division by 2/4/8. For example, + the table of int32_t values that come from different sources; if it is likely + that 3 highest bytes of values from the same source are the same, then + copy distance often looks like 4x + y. + + Distance calculation could be rewritten to: + + ndistbits = NDISTBITS(NDIRECT, NPOSTFIX)[dcode] + distance = OFFSET(NDIRECT, NPOSTFIX)[dcode] + extra << NPOSTFIX + + NDISTBITS and OFFSET could be pre-calculated, as NDIRECT and NPOSTFIX could + change only once per meta-block. +*/ + +/* Calculates distance lookup table. + NB: it is possible to have all 64 tables precalculated. */ +static void CalculateDistanceLut(BrotliDecoderState* s) { + BrotliMetablockBodyArena* b = &s->arena.body; + brotli_reg_t npostfix = s->distance_postfix_bits; + brotli_reg_t ndirect = s->num_direct_distance_codes; + brotli_reg_t alphabet_size_limit = s->distance_hgroup.alphabet_size_limit; + brotli_reg_t postfix = (brotli_reg_t)1u << npostfix; + brotli_reg_t j; + brotli_reg_t bits = 1; + brotli_reg_t half = 0; + + /* Skip short codes. */ + brotli_reg_t i = BROTLI_NUM_DISTANCE_SHORT_CODES; + + /* Fill direct codes. */ + for (j = 0; j < ndirect; ++j) { + b->dist_extra_bits[i] = 0; + b->dist_offset[i] = j + 1; + ++i; + } + + /* Fill regular distance codes. */ + while (i < alphabet_size_limit) { + brotli_reg_t base = ndirect + ((((2 + half) << bits) - 4) << npostfix) + 1; + /* Always fill the complete group. */ + for (j = 0; j < postfix; ++j) { + b->dist_extra_bits[i] = (uint8_t)bits; + b->dist_offset[i] = base + j; + ++i; + } + bits = bits + half; + half = half ^ 1; + } +} + +/* Precondition: s->distance_code < 0. */ +static BROTLI_INLINE BROTLI_BOOL ReadDistanceInternal( + int safe, BrotliDecoderState* s, BrotliBitReader* br) { + BrotliMetablockBodyArena* b = &s->arena.body; + brotli_reg_t code; + brotli_reg_t bits; + BrotliBitReaderState memento; + HuffmanCode* distance_tree = s->distance_hgroup.htrees[s->dist_htree_index]; + if (!safe) { + code = ReadSymbol(distance_tree, br); + } else { + BrotliBitReaderSaveState(br, &memento); + if (!SafeReadSymbol(distance_tree, br, &code)) { + return BROTLI_FALSE; + } + } + --s->block_length[2]; + /* Convert the distance code to the actual distance by possibly + looking up past distances from the s->dist_rb. */ + s->distance_context = 0; + if ((code & ~0xFu) == 0) { + s->distance_code = (int)code; + TakeDistanceFromRingBuffer(s); + return BROTLI_TRUE; + } + if (!safe) { + bits = BrotliReadBits32(br, b->dist_extra_bits[code]); + } else { + if (!SafeReadBits32(br, b->dist_extra_bits[code], &bits)) { + ++s->block_length[2]; + BrotliBitReaderRestoreState(br, &memento); + return BROTLI_FALSE; + } + } + s->distance_code = + (int)(b->dist_offset[code] + (bits << s->distance_postfix_bits)); + return BROTLI_TRUE; +} + +static BROTLI_INLINE void ReadDistance( + BrotliDecoderState* s, BrotliBitReader* br) { + ReadDistanceInternal(0, s, br); +} + +static BROTLI_INLINE BROTLI_BOOL SafeReadDistance( + BrotliDecoderState* s, BrotliBitReader* br) { + return ReadDistanceInternal(1, s, br); +} + +static BROTLI_INLINE BROTLI_BOOL ReadCommandInternal( + int safe, BrotliDecoderState* s, BrotliBitReader* br, int* insert_length) { + brotli_reg_t cmd_code; + brotli_reg_t insert_len_extra = 0; + brotli_reg_t copy_length; + CmdLutElement v; + BrotliBitReaderState memento; + if (!safe) { + cmd_code = ReadSymbol(s->htree_command, br); + } else { + BrotliBitReaderSaveState(br, &memento); + if (!SafeReadSymbol(s->htree_command, br, &cmd_code)) { + return BROTLI_FALSE; + } + } + v = kCmdLut[cmd_code]; + s->distance_code = v.distance_code; + s->distance_context = v.context; + s->dist_htree_index = s->dist_context_map_slice[s->distance_context]; + *insert_length = v.insert_len_offset; + if (!safe) { + if (BROTLI_PREDICT_FALSE(v.insert_len_extra_bits != 0)) { + insert_len_extra = BrotliReadBits24(br, v.insert_len_extra_bits); + } + copy_length = BrotliReadBits24(br, v.copy_len_extra_bits); + } else { + if (!SafeReadBits(br, v.insert_len_extra_bits, &insert_len_extra) || + !SafeReadBits(br, v.copy_len_extra_bits, ©_length)) { + BrotliBitReaderRestoreState(br, &memento); + return BROTLI_FALSE; + } + } + s->copy_length = (int)copy_length + v.copy_len_offset; + --s->block_length[1]; + *insert_length += (int)insert_len_extra; + return BROTLI_TRUE; +} + +static BROTLI_INLINE void ReadCommand( + BrotliDecoderState* s, BrotliBitReader* br, int* insert_length) { + ReadCommandInternal(0, s, br, insert_length); +} + +static BROTLI_INLINE BROTLI_BOOL SafeReadCommand( + BrotliDecoderState* s, BrotliBitReader* br, int* insert_length) { + return ReadCommandInternal(1, s, br, insert_length); +} + +static BROTLI_INLINE BROTLI_BOOL CheckInputAmount( + int safe, BrotliBitReader* const br) { + if (safe) { + return BROTLI_TRUE; + } + return BrotliCheckInputAmount(br); +} + +#define BROTLI_SAFE(METHOD) \ + { \ + if (safe) { \ + if (!Safe##METHOD) { \ + result = BROTLI_DECODER_NEEDS_MORE_INPUT; \ + goto saveStateAndReturn; \ + } \ + } else { \ + METHOD; \ + } \ + } + +static BROTLI_INLINE BrotliDecoderErrorCode ProcessCommandsInternal( + int safe, BrotliDecoderState* s) { + int pos = s->pos; + int i = s->loop_counter; + BrotliDecoderErrorCode result = BROTLI_DECODER_SUCCESS; + BrotliBitReader* br = &s->br; + int compound_dictionary_size = GetCompoundDictionarySize(s); + + if (!CheckInputAmount(safe, br)) { + result = BROTLI_DECODER_NEEDS_MORE_INPUT; + goto saveStateAndReturn; + } + if (!safe) { + BROTLI_UNUSED(BrotliWarmupBitReader(br)); + } + + /* Jump into state machine. */ + if (s->state == BROTLI_STATE_COMMAND_BEGIN) { + goto CommandBegin; + } else if (s->state == BROTLI_STATE_COMMAND_INNER) { + goto CommandInner; + } else if (s->state == BROTLI_STATE_COMMAND_POST_DECODE_LITERALS) { + goto CommandPostDecodeLiterals; + } else if (s->state == BROTLI_STATE_COMMAND_POST_WRAP_COPY) { + goto CommandPostWrapCopy; + } else { + return BROTLI_FAILURE(BROTLI_DECODER_ERROR_UNREACHABLE); /* COV_NF_LINE */ + } + +CommandBegin: + if (safe) { + s->state = BROTLI_STATE_COMMAND_BEGIN; + } + if (!CheckInputAmount(safe, br)) { + s->state = BROTLI_STATE_COMMAND_BEGIN; + result = BROTLI_DECODER_NEEDS_MORE_INPUT; + goto saveStateAndReturn; + } + if (BROTLI_PREDICT_FALSE(s->block_length[1] == 0)) { + BROTLI_SAFE(DecodeCommandBlockSwitch(s)); + goto CommandBegin; + } + /* Read the insert/copy length in the command. */ + BROTLI_SAFE(ReadCommand(s, br, &i)); + BROTLI_LOG(("[ProcessCommandsInternal] pos = %d insert = %d copy = %d\n", + pos, i, s->copy_length)); + if (i == 0) { + goto CommandPostDecodeLiterals; + } + s->meta_block_remaining_len -= i; + +CommandInner: + if (safe) { + s->state = BROTLI_STATE_COMMAND_INNER; + } + /* Read the literals in the command. */ + if (s->trivial_literal_context) { + brotli_reg_t bits; + brotli_reg_t value; + PreloadSymbol(safe, s->literal_htree, br, &bits, &value); + if (!safe) { + // This is a hottest part of the decode, so we copy the loop below + // and optimize it by calculating the number of steps where all checks + // evaluate to false (ringbuffer size/block size/input size). + // Since all checks are loop invariant, we just need to find + // minimal number of iterations for a simple loop, and run + // the full version for the remainder. + int num_steps = i - 1; + if (num_steps > 0 && ((brotli_reg_t)(num_steps) > s->block_length[0])) { + // Safe cast, since block_length < steps + num_steps = (int)s->block_length[0]; + } + if (s->ringbuffer_size >= pos && + (s->ringbuffer_size - pos) <= num_steps) { + num_steps = s->ringbuffer_size - pos - 1; + } + if (num_steps < 0) { + num_steps = 0; + } + num_steps = BrotliCopyPreloadedSymbolsToU8(s->literal_htree, br, &bits, + &value, s->ringbuffer, pos, + num_steps); + pos += num_steps; + s->block_length[0] -= (brotli_reg_t)num_steps; + i -= num_steps; + do { + if (!CheckInputAmount(safe, br)) { + s->state = BROTLI_STATE_COMMAND_INNER; + result = BROTLI_DECODER_NEEDS_MORE_INPUT; + goto saveStateAndReturn; + } + if (BROTLI_PREDICT_FALSE(s->block_length[0] == 0)) { + goto NextLiteralBlock; + } + BrotliCopyPreloadedSymbolsToU8(s->literal_htree, br, &bits, &value, + s->ringbuffer, pos, 1); + --s->block_length[0]; + BROTLI_LOG_ARRAY_INDEX(s->ringbuffer, pos); + ++pos; + if (BROTLI_PREDICT_FALSE(pos == s->ringbuffer_size)) { + s->state = BROTLI_STATE_COMMAND_INNER_WRITE; + --i; + goto saveStateAndReturn; + } + } while (--i != 0); + } else { /* safe */ + do { + if (BROTLI_PREDICT_FALSE(s->block_length[0] == 0)) { + goto NextLiteralBlock; + } + brotli_reg_t literal; + if (!SafeReadSymbol(s->literal_htree, br, &literal)) { + result = BROTLI_DECODER_NEEDS_MORE_INPUT; + goto saveStateAndReturn; + } + s->ringbuffer[pos] = (uint8_t)literal; + --s->block_length[0]; + BROTLI_LOG_ARRAY_INDEX(s->ringbuffer, pos); + ++pos; + if (BROTLI_PREDICT_FALSE(pos == s->ringbuffer_size)) { + s->state = BROTLI_STATE_COMMAND_INNER_WRITE; + --i; + goto saveStateAndReturn; + } + } while (--i != 0); + } + } else { + uint8_t p1 = s->ringbuffer[(pos - 1) & s->ringbuffer_mask]; + uint8_t p2 = s->ringbuffer[(pos - 2) & s->ringbuffer_mask]; + do { + const HuffmanCode* hc; + uint8_t context; + if (!CheckInputAmount(safe, br)) { + s->state = BROTLI_STATE_COMMAND_INNER; + result = BROTLI_DECODER_NEEDS_MORE_INPUT; + goto saveStateAndReturn; + } + if (BROTLI_PREDICT_FALSE(s->block_length[0] == 0)) { + goto NextLiteralBlock; + } + context = BROTLI_CONTEXT(p1, p2, s->context_lookup); + BROTLI_LOG_UINT(context); + hc = s->literal_hgroup.htrees[s->context_map_slice[context]]; + p2 = p1; + if (!safe) { + p1 = (uint8_t)ReadSymbol(hc, br); + } else { + brotli_reg_t literal; + if (!SafeReadSymbol(hc, br, &literal)) { + result = BROTLI_DECODER_NEEDS_MORE_INPUT; + goto saveStateAndReturn; + } + p1 = (uint8_t)literal; + } + s->ringbuffer[pos] = p1; + --s->block_length[0]; + BROTLI_LOG_UINT(s->context_map_slice[context]); + BROTLI_LOG_ARRAY_INDEX(s->ringbuffer, pos & s->ringbuffer_mask); + ++pos; + if (BROTLI_PREDICT_FALSE(pos == s->ringbuffer_size)) { + s->state = BROTLI_STATE_COMMAND_INNER_WRITE; + --i; + goto saveStateAndReturn; + } + } while (--i != 0); + } + BROTLI_LOG_UINT(s->meta_block_remaining_len); + if (BROTLI_PREDICT_FALSE(s->meta_block_remaining_len <= 0)) { + s->state = BROTLI_STATE_METABLOCK_DONE; + goto saveStateAndReturn; + } + +CommandPostDecodeLiterals: + if (safe) { + s->state = BROTLI_STATE_COMMAND_POST_DECODE_LITERALS; + } + if (s->distance_code >= 0) { + /* Implicit distance case. */ + s->distance_context = s->distance_code ? 0 : 1; + --s->dist_rb_idx; + s->distance_code = s->dist_rb[s->dist_rb_idx & 3]; + } else { + /* Read distance code in the command, unless it was implicitly zero. */ + if (BROTLI_PREDICT_FALSE(s->block_length[2] == 0)) { + BROTLI_SAFE(DecodeDistanceBlockSwitch(s)); + } + BROTLI_SAFE(ReadDistance(s, br)); + } + BROTLI_LOG(("[ProcessCommandsInternal] pos = %d distance = %d\n", + pos, s->distance_code)); + if (s->max_distance != s->max_backward_distance) { + s->max_distance = + (pos < s->max_backward_distance) ? pos : s->max_backward_distance; + } + i = s->copy_length; + /* Apply copy of LZ77 back-reference, or static dictionary reference if + the distance is larger than the max LZ77 distance */ + if (s->distance_code > s->max_distance) { + /* The maximum allowed distance is BROTLI_MAX_ALLOWED_DISTANCE = 0x7FFFFFFC. + With this choice, no signed overflow can occur after decoding + a special distance code (e.g., after adding 3 to the last distance). */ + if (s->distance_code > BROTLI_MAX_ALLOWED_DISTANCE) { + BROTLI_LOG(("Invalid backward reference. pos: %d distance: %d " + "len: %d bytes left: %d\n", + pos, s->distance_code, i, s->meta_block_remaining_len)); + return BROTLI_FAILURE(BROTLI_DECODER_ERROR_FORMAT_DISTANCE); + } + if (s->distance_code - s->max_distance - 1 < compound_dictionary_size) { + int address = compound_dictionary_size - + (s->distance_code - s->max_distance); + if (!InitializeCompoundDictionaryCopy(s, address, i)) { + return BROTLI_FAILURE(BROTLI_DECODER_ERROR_COMPOUND_DICTIONARY); + } + pos += CopyFromCompoundDictionary(s, pos); + if (pos >= s->ringbuffer_size) { + s->state = BROTLI_STATE_COMMAND_POST_WRITE_1; + goto saveStateAndReturn; + } + } else if (i >= SHARED_BROTLI_MIN_DICTIONARY_WORD_LENGTH && + i <= SHARED_BROTLI_MAX_DICTIONARY_WORD_LENGTH) { + uint8_t p1 = s->ringbuffer[(pos - 1) & s->ringbuffer_mask]; + uint8_t p2 = s->ringbuffer[(pos - 2) & s->ringbuffer_mask]; + uint8_t dict_id = s->dictionary->context_based ? + s->dictionary->context_map[BROTLI_CONTEXT(p1, p2, s->context_lookup)] + : 0; + const BrotliDictionary* words = s->dictionary->words[dict_id]; + const BrotliTransforms* transforms = s->dictionary->transforms[dict_id]; + int offset = (int)words->offsets_by_length[i]; + brotli_reg_t shift = words->size_bits_by_length[i]; + int address = + s->distance_code - s->max_distance - 1 - compound_dictionary_size; + int mask = (int)BitMask(shift); + int word_idx = address & mask; + int transform_idx = address >> shift; + /* Compensate double distance-ring-buffer roll. */ + s->dist_rb_idx += s->distance_context; + offset += word_idx * i; + /* If the distance is out of bound, select a next static dictionary if + there exist multiple. */ + if ((transform_idx >= (int)transforms->num_transforms || + words->size_bits_by_length[i] == 0) && + s->dictionary->num_dictionaries > 1) { + uint8_t dict_id2; + int dist_remaining = address - + (int)(((1u << shift) & ~1u)) * (int)transforms->num_transforms; + for (dict_id2 = 0; dict_id2 < s->dictionary->num_dictionaries; + dict_id2++) { + const BrotliDictionary* words2 = s->dictionary->words[dict_id2]; + if (dict_id2 != dict_id && words2->size_bits_by_length[i] != 0) { + const BrotliTransforms* transforms2 = + s->dictionary->transforms[dict_id2]; + brotli_reg_t shift2 = words2->size_bits_by_length[i]; + int num = (int)((1u << shift2) & ~1u) * + (int)transforms2->num_transforms; + if (dist_remaining < num) { + dict_id = dict_id2; + words = words2; + transforms = transforms2; + address = dist_remaining; + shift = shift2; + mask = (int)BitMask(shift); + word_idx = address & mask; + transform_idx = address >> shift; + offset = (int)words->offsets_by_length[i] + word_idx * i; + break; + } + dist_remaining -= num; + } + } + } + if (BROTLI_PREDICT_FALSE(words->size_bits_by_length[i] == 0)) { + BROTLI_LOG(("Invalid backward reference. pos: %d distance: %d " + "len: %d bytes left: %d\n", + pos, s->distance_code, i, s->meta_block_remaining_len)); + return BROTLI_FAILURE(BROTLI_DECODER_ERROR_FORMAT_DICTIONARY); + } + if (BROTLI_PREDICT_FALSE(!words->data)) { + return BROTLI_FAILURE(BROTLI_DECODER_ERROR_DICTIONARY_NOT_SET); + } + if (transform_idx < (int)transforms->num_transforms) { + const uint8_t* word = &words->data[offset]; + int len = i; + if (transform_idx == transforms->cutOffTransforms[0]) { + memcpy(&s->ringbuffer[pos], word, (size_t)len); + BROTLI_LOG(("[ProcessCommandsInternal] dictionary word: [%.*s]\n", + len, word)); + } else { + len = BrotliTransformDictionaryWord(&s->ringbuffer[pos], word, len, + transforms, transform_idx); + BROTLI_LOG(("[ProcessCommandsInternal] dictionary word: [%.*s]," + " transform_idx = %d, transformed: [%.*s]\n", + i, word, transform_idx, len, &s->ringbuffer[pos])); + if (len == 0 && s->distance_code <= 120) { + BROTLI_LOG(("Invalid length-0 dictionary word after transform\n")); + return BROTLI_FAILURE(BROTLI_DECODER_ERROR_FORMAT_TRANSFORM); + } + } + pos += len; + s->meta_block_remaining_len -= len; + if (pos >= s->ringbuffer_size) { + s->state = BROTLI_STATE_COMMAND_POST_WRITE_1; + goto saveStateAndReturn; + } + } else { + BROTLI_LOG(("Invalid backward reference. pos: %d distance: %d " + "len: %d bytes left: %d\n", + pos, s->distance_code, i, s->meta_block_remaining_len)); + return BROTLI_FAILURE(BROTLI_DECODER_ERROR_FORMAT_TRANSFORM); + } + } else { + BROTLI_LOG(("Invalid backward reference. pos: %d distance: %d " + "len: %d bytes left: %d\n", + pos, s->distance_code, i, s->meta_block_remaining_len)); + return BROTLI_FAILURE(BROTLI_DECODER_ERROR_FORMAT_DICTIONARY); + } + } else { + int src_start = (pos - s->distance_code) & s->ringbuffer_mask; + uint8_t* copy_dst = &s->ringbuffer[pos]; + uint8_t* copy_src = &s->ringbuffer[src_start]; + int dst_end = pos + i; + int src_end = src_start + i; + /* Update the recent distances cache. */ + s->dist_rb[s->dist_rb_idx & 3] = s->distance_code; + ++s->dist_rb_idx; + s->meta_block_remaining_len -= i; + /* There are 32+ bytes of slack in the ring-buffer allocation. + Also, we have 16 short codes, that make these 16 bytes irrelevant + in the ring-buffer. Let's copy over them as a first guess. */ + memmove16(copy_dst, copy_src); + if (src_end > pos && dst_end > src_start) { + /* Regions intersect. */ + goto CommandPostWrapCopy; + } + if (dst_end >= s->ringbuffer_size || src_end >= s->ringbuffer_size) { + /* At least one region wraps. */ + goto CommandPostWrapCopy; + } + pos += i; + if (i > 16) { + if (i > 32) { + memcpy(copy_dst + 16, copy_src + 16, (size_t)(i - 16)); + } else { + /* This branch covers about 45% cases. + Fixed size short copy allows more compiler optimizations. */ + memmove16(copy_dst + 16, copy_src + 16); + } + } + } + BROTLI_LOG_UINT(s->meta_block_remaining_len); + if (s->meta_block_remaining_len <= 0) { + /* Next metablock, if any. */ + s->state = BROTLI_STATE_METABLOCK_DONE; + goto saveStateAndReturn; + } else { + goto CommandBegin; + } +CommandPostWrapCopy: + { + int wrap_guard = s->ringbuffer_size - pos; + while (--i >= 0) { + s->ringbuffer[pos] = + s->ringbuffer[(pos - s->distance_code) & s->ringbuffer_mask]; + ++pos; + if (BROTLI_PREDICT_FALSE(--wrap_guard == 0)) { + s->state = BROTLI_STATE_COMMAND_POST_WRITE_2; + goto saveStateAndReturn; + } + } + } + if (s->meta_block_remaining_len <= 0) { + /* Next metablock, if any. */ + s->state = BROTLI_STATE_METABLOCK_DONE; + goto saveStateAndReturn; + } else { + goto CommandBegin; + } + +NextLiteralBlock: + BROTLI_SAFE(DecodeLiteralBlockSwitch(s)); + goto CommandInner; + +saveStateAndReturn: + s->pos = pos; + s->loop_counter = i; + return result; +} + +#undef BROTLI_SAFE + +static BROTLI_NOINLINE BrotliDecoderErrorCode ProcessCommands( + BrotliDecoderState* s) { + return ProcessCommandsInternal(0, s); +} + +static BROTLI_NOINLINE BrotliDecoderErrorCode SafeProcessCommands( + BrotliDecoderState* s) { + return ProcessCommandsInternal(1, s); +} + +BrotliDecoderResult BrotliDecoderDecompress( + size_t encoded_size, + const uint8_t encoded_buffer[BROTLI_ARRAY_PARAM(encoded_size)], + size_t* decoded_size, + uint8_t decoded_buffer[BROTLI_ARRAY_PARAM(*decoded_size)]) { + BrotliDecoderState s; + BrotliDecoderResult result; + size_t total_out = 0; + size_t available_in = encoded_size; + const uint8_t* next_in = encoded_buffer; + size_t available_out = *decoded_size; + uint8_t* next_out = decoded_buffer; + if (!BrotliDecoderStateInit(&s, 0, 0, 0)) { + return BROTLI_DECODER_RESULT_ERROR; + } + result = BrotliDecoderDecompressStream( + &s, &available_in, &next_in, &available_out, &next_out, &total_out); + *decoded_size = total_out; + BrotliDecoderStateCleanup(&s); + if (result != BROTLI_DECODER_RESULT_SUCCESS) { + result = BROTLI_DECODER_RESULT_ERROR; + } + return result; +} + +/* Invariant: input stream is never overconsumed: + - invalid input implies that the whole stream is invalid -> any amount of + input could be read and discarded + - when result is "needs more input", then at least one more byte is REQUIRED + to complete decoding; all input data MUST be consumed by decoder, so + client could swap the input buffer + - when result is "needs more output" decoder MUST ensure that it doesn't + hold more than 7 bits in bit reader; this saves client from swapping input + buffer ahead of time + - when result is "success" decoder MUST return all unused data back to input + buffer; this is possible because the invariant is held on enter */ +BrotliDecoderResult BrotliDecoderDecompressStream( + BrotliDecoderState* s, size_t* available_in, const uint8_t** next_in, + size_t* available_out, uint8_t** next_out, size_t* total_out) { + BrotliDecoderErrorCode result = BROTLI_DECODER_SUCCESS; + BrotliBitReader* br = &s->br; + size_t input_size = *available_in; +#define BROTLI_SAVE_ERROR_CODE(code) \ + SaveErrorCode(s, (code), input_size - *available_in) + /* Ensure that |total_out| is set, even if no data will ever be pushed out. */ + if (total_out) { + *total_out = s->partial_pos_out; + } + /* Do not try to process further in a case of unrecoverable error. */ + if ((int)s->error_code < 0) { + return BROTLI_DECODER_RESULT_ERROR; + } + if (*available_out && (!next_out || !*next_out)) { + return BROTLI_SAVE_ERROR_CODE( + BROTLI_FAILURE(BROTLI_DECODER_ERROR_INVALID_ARGUMENTS)); + } + if (!*available_out) next_out = 0; + if (s->buffer_length == 0) { /* Just connect bit reader to input stream. */ + BrotliBitReaderSetInput(br, *next_in, *available_in); + } else { + /* At least one byte of input is required. More than one byte of input may + be required to complete the transaction -> reading more data must be + done in a loop -> do it in a main loop. */ + result = BROTLI_DECODER_NEEDS_MORE_INPUT; + BrotliBitReaderSetInput(br, &s->buffer.u8[0], s->buffer_length); + } + /* State machine */ + for (;;) { + if (result != BROTLI_DECODER_SUCCESS) { + /* Error, needs more input/output. */ + if (result == BROTLI_DECODER_NEEDS_MORE_INPUT) { + if (s->ringbuffer != 0) { /* Pro-actively push output. */ + BrotliDecoderErrorCode intermediate_result = WriteRingBuffer(s, + available_out, next_out, total_out, BROTLI_TRUE); + /* WriteRingBuffer checks s->meta_block_remaining_len validity. */ + if ((int)intermediate_result < 0) { + result = intermediate_result; + break; + } + } + if (s->buffer_length != 0) { /* Used with internal buffer. */ + if (br->next_in == br->last_in) { + /* Successfully finished read transaction. + Accumulator contains less than 8 bits, because internal buffer + is expanded byte-by-byte until it is enough to complete read. */ + s->buffer_length = 0; + /* Switch to input stream and restart. */ + result = BROTLI_DECODER_SUCCESS; + BrotliBitReaderSetInput(br, *next_in, *available_in); + continue; + } else if (*available_in != 0) { + /* Not enough data in buffer, but can take one more byte from + input stream. */ + result = BROTLI_DECODER_SUCCESS; + BROTLI_DCHECK(s->buffer_length < 8); + s->buffer.u8[s->buffer_length] = **next_in; + s->buffer_length++; + BrotliBitReaderSetInput(br, &s->buffer.u8[0], s->buffer_length); + (*next_in)++; + (*available_in)--; + /* Retry with more data in buffer. */ + continue; + } + /* Can't finish reading and no more input. */ + break; + } else { /* Input stream doesn't contain enough input. */ + /* Copy tail to internal buffer and return. */ + *next_in = br->next_in; + *available_in = BrotliBitReaderGetAvailIn(br); + while (*available_in) { + s->buffer.u8[s->buffer_length] = **next_in; + s->buffer_length++; + (*next_in)++; + (*available_in)--; + } + break; + } + /* Unreachable. */ + } + + /* Fail or needs more output. */ + + if (s->buffer_length != 0) { + /* Just consumed the buffered input and produced some output. Otherwise + it would result in "needs more input". Reset internal buffer. */ + s->buffer_length = 0; + } else { + /* Using input stream in last iteration. When decoder switches to input + stream it has less than 8 bits in accumulator, so it is safe to + return unused accumulator bits there. */ + BrotliBitReaderUnload(br); + *available_in = BrotliBitReaderGetAvailIn(br); + *next_in = br->next_in; + } + break; + } + switch (s->state) { + case BROTLI_STATE_UNINITED: + /* Prepare to the first read. */ + if (!BrotliWarmupBitReader(br)) { + result = BROTLI_DECODER_NEEDS_MORE_INPUT; + break; + } + /* Decode window size. */ + result = DecodeWindowBits(s, br); /* Reads 1..8 bits. */ + if (result != BROTLI_DECODER_SUCCESS) { + break; + } + if (s->large_window) { + s->state = BROTLI_STATE_LARGE_WINDOW_BITS; + break; + } + s->state = BROTLI_STATE_INITIALIZE; + break; + + case BROTLI_STATE_LARGE_WINDOW_BITS: { + brotli_reg_t bits; + if (!BrotliSafeReadBits(br, 6, &bits)) { + result = BROTLI_DECODER_NEEDS_MORE_INPUT; + break; + } + s->window_bits = bits & 63u; + if (s->window_bits < BROTLI_LARGE_MIN_WBITS || + s->window_bits > BROTLI_LARGE_MAX_WBITS) { + result = BROTLI_FAILURE(BROTLI_DECODER_ERROR_FORMAT_WINDOW_BITS); + break; + } + s->state = BROTLI_STATE_INITIALIZE; + } + /* Fall through. */ + + case BROTLI_STATE_INITIALIZE: + BROTLI_LOG_UINT(s->window_bits); + /* Maximum distance, see section 9.1. of the spec. */ + s->max_backward_distance = (1 << s->window_bits) - BROTLI_WINDOW_GAP; + + /* Allocate memory for both block_type_trees and block_len_trees. */ + s->block_type_trees = (HuffmanCode*)BROTLI_DECODER_ALLOC(s, + sizeof(HuffmanCode) * 3 * + (BROTLI_HUFFMAN_MAX_SIZE_258 + BROTLI_HUFFMAN_MAX_SIZE_26)); + if (s->block_type_trees == 0) { + result = BROTLI_FAILURE(BROTLI_DECODER_ERROR_ALLOC_BLOCK_TYPE_TREES); + break; + } + s->block_len_trees = + s->block_type_trees + 3 * BROTLI_HUFFMAN_MAX_SIZE_258; + + s->state = BROTLI_STATE_METABLOCK_BEGIN; + /* Fall through. */ + + case BROTLI_STATE_METABLOCK_BEGIN: + BrotliDecoderStateMetablockBegin(s); + BROTLI_LOG_UINT(s->pos); + s->state = BROTLI_STATE_METABLOCK_HEADER; + /* Fall through. */ + + case BROTLI_STATE_METABLOCK_HEADER: + result = DecodeMetaBlockLength(s, br); /* Reads 2 - 31 bits. */ + if (result != BROTLI_DECODER_SUCCESS) { + break; + } + BROTLI_LOG_UINT(s->is_last_metablock); + BROTLI_LOG_UINT(s->meta_block_remaining_len); + BROTLI_LOG_UINT(s->is_metadata); + BROTLI_LOG_UINT(s->is_uncompressed); + if (s->is_metadata || s->is_uncompressed) { + if (!BrotliJumpToByteBoundary(br)) { + result = BROTLI_FAILURE(BROTLI_DECODER_ERROR_FORMAT_PADDING_1); + break; + } + } + if (s->is_metadata) { + s->state = BROTLI_STATE_METADATA; + if (s->metadata_start_func) { + s->metadata_start_func(s->metadata_callback_opaque, + (size_t)s->meta_block_remaining_len); + } + break; + } + if (s->meta_block_remaining_len == 0) { + s->state = BROTLI_STATE_METABLOCK_DONE; + break; + } + BrotliCalculateRingBufferSize(s); + if (s->is_uncompressed) { + s->state = BROTLI_STATE_UNCOMPRESSED; + break; + } + s->state = BROTLI_STATE_BEFORE_COMPRESSED_METABLOCK_HEADER; + /* Fall through. */ + + case BROTLI_STATE_BEFORE_COMPRESSED_METABLOCK_HEADER: { + BrotliMetablockHeaderArena* h = &s->arena.header; + s->loop_counter = 0; + /* Initialize compressed metablock header arena. */ + h->sub_loop_counter = 0; + /* Make small negative indexes addressable. */ + h->symbol_lists = + &h->symbols_lists_array[BROTLI_HUFFMAN_MAX_CODE_LENGTH + 1]; + h->substate_huffman = BROTLI_STATE_HUFFMAN_NONE; + h->substate_tree_group = BROTLI_STATE_TREE_GROUP_NONE; + h->substate_context_map = BROTLI_STATE_CONTEXT_MAP_NONE; + s->state = BROTLI_STATE_HUFFMAN_CODE_0; + } + /* Fall through. */ + + case BROTLI_STATE_HUFFMAN_CODE_0: + if (s->loop_counter >= 3) { + s->state = BROTLI_STATE_METABLOCK_HEADER_2; + break; + } + /* Reads 1..11 bits. */ + result = DecodeVarLenUint8(s, br, &s->num_block_types[s->loop_counter]); + if (result != BROTLI_DECODER_SUCCESS) { + break; + } + s->num_block_types[s->loop_counter]++; + BROTLI_LOG_UINT(s->num_block_types[s->loop_counter]); + if (s->num_block_types[s->loop_counter] < 2) { + s->loop_counter++; + break; + } + s->state = BROTLI_STATE_HUFFMAN_CODE_1; + /* Fall through. */ + + case BROTLI_STATE_HUFFMAN_CODE_1: { + brotli_reg_t alphabet_size = s->num_block_types[s->loop_counter] + 2; + int tree_offset = s->loop_counter * BROTLI_HUFFMAN_MAX_SIZE_258; + result = ReadHuffmanCode(alphabet_size, alphabet_size, + &s->block_type_trees[tree_offset], NULL, s); + if (result != BROTLI_DECODER_SUCCESS) break; + s->state = BROTLI_STATE_HUFFMAN_CODE_2; + } + /* Fall through. */ + + case BROTLI_STATE_HUFFMAN_CODE_2: { + brotli_reg_t alphabet_size = BROTLI_NUM_BLOCK_LEN_SYMBOLS; + int tree_offset = s->loop_counter * BROTLI_HUFFMAN_MAX_SIZE_26; + result = ReadHuffmanCode(alphabet_size, alphabet_size, + &s->block_len_trees[tree_offset], NULL, s); + if (result != BROTLI_DECODER_SUCCESS) break; + s->state = BROTLI_STATE_HUFFMAN_CODE_3; + } + /* Fall through. */ + + case BROTLI_STATE_HUFFMAN_CODE_3: { + int tree_offset = s->loop_counter * BROTLI_HUFFMAN_MAX_SIZE_26; + if (!SafeReadBlockLength(s, &s->block_length[s->loop_counter], + &s->block_len_trees[tree_offset], br)) { + result = BROTLI_DECODER_NEEDS_MORE_INPUT; + break; + } + BROTLI_LOG_UINT(s->block_length[s->loop_counter]); + s->loop_counter++; + s->state = BROTLI_STATE_HUFFMAN_CODE_0; + break; + } + + case BROTLI_STATE_UNCOMPRESSED: { + result = CopyUncompressedBlockToOutput( + available_out, next_out, total_out, s); + if (result != BROTLI_DECODER_SUCCESS) { + break; + } + s->state = BROTLI_STATE_METABLOCK_DONE; + break; + } + + case BROTLI_STATE_METADATA: + result = SkipMetadataBlock(s); + if (result != BROTLI_DECODER_SUCCESS) { + break; + } + s->state = BROTLI_STATE_METABLOCK_DONE; + break; + + case BROTLI_STATE_METABLOCK_HEADER_2: { + brotli_reg_t bits; + if (!BrotliSafeReadBits(br, 6, &bits)) { + result = BROTLI_DECODER_NEEDS_MORE_INPUT; + break; + } + s->distance_postfix_bits = bits & BitMask(2); + bits >>= 2; + s->num_direct_distance_codes = bits << s->distance_postfix_bits; + BROTLI_LOG_UINT(s->num_direct_distance_codes); + BROTLI_LOG_UINT(s->distance_postfix_bits); + s->context_modes = + (uint8_t*)BROTLI_DECODER_ALLOC(s, (size_t)s->num_block_types[0]); + if (s->context_modes == 0) { + result = BROTLI_FAILURE(BROTLI_DECODER_ERROR_ALLOC_CONTEXT_MODES); + break; + } + s->loop_counter = 0; + s->state = BROTLI_STATE_CONTEXT_MODES; + } + /* Fall through. */ + + case BROTLI_STATE_CONTEXT_MODES: + result = ReadContextModes(s); + if (result != BROTLI_DECODER_SUCCESS) { + break; + } + s->state = BROTLI_STATE_CONTEXT_MAP_1; + /* Fall through. */ + + case BROTLI_STATE_CONTEXT_MAP_1: + result = DecodeContextMap( + s->num_block_types[0] << BROTLI_LITERAL_CONTEXT_BITS, + &s->num_literal_htrees, &s->context_map, s); + if (result != BROTLI_DECODER_SUCCESS) { + break; + } + DetectTrivialLiteralBlockTypes(s); + s->state = BROTLI_STATE_CONTEXT_MAP_2; + /* Fall through. */ + + case BROTLI_STATE_CONTEXT_MAP_2: { + brotli_reg_t npostfix = s->distance_postfix_bits; + brotli_reg_t ndirect = s->num_direct_distance_codes; + brotli_reg_t distance_alphabet_size_max = BROTLI_DISTANCE_ALPHABET_SIZE( + npostfix, ndirect, BROTLI_MAX_DISTANCE_BITS); + brotli_reg_t distance_alphabet_size_limit = distance_alphabet_size_max; + BROTLI_BOOL allocation_success = BROTLI_TRUE; + if (s->large_window) { + BrotliDistanceCodeLimit limit = BrotliCalculateDistanceCodeLimit( + BROTLI_MAX_ALLOWED_DISTANCE, (uint32_t)npostfix, + (uint32_t)ndirect); + distance_alphabet_size_max = BROTLI_DISTANCE_ALPHABET_SIZE( + npostfix, ndirect, BROTLI_LARGE_MAX_DISTANCE_BITS); + distance_alphabet_size_limit = limit.max_alphabet_size; + } + result = DecodeContextMap( + s->num_block_types[2] << BROTLI_DISTANCE_CONTEXT_BITS, + &s->num_dist_htrees, &s->dist_context_map, s); + if (result != BROTLI_DECODER_SUCCESS) { + break; + } + allocation_success &= BrotliDecoderHuffmanTreeGroupInit( + s, &s->literal_hgroup, BROTLI_NUM_LITERAL_SYMBOLS, + BROTLI_NUM_LITERAL_SYMBOLS, s->num_literal_htrees); + allocation_success &= BrotliDecoderHuffmanTreeGroupInit( + s, &s->insert_copy_hgroup, BROTLI_NUM_COMMAND_SYMBOLS, + BROTLI_NUM_COMMAND_SYMBOLS, s->num_block_types[1]); + allocation_success &= BrotliDecoderHuffmanTreeGroupInit( + s, &s->distance_hgroup, distance_alphabet_size_max, + distance_alphabet_size_limit, s->num_dist_htrees); + if (!allocation_success) { + return BROTLI_SAVE_ERROR_CODE( + BROTLI_FAILURE(BROTLI_DECODER_ERROR_ALLOC_TREE_GROUPS)); + } + s->loop_counter = 0; + s->state = BROTLI_STATE_TREE_GROUP; + } + /* Fall through. */ + + case BROTLI_STATE_TREE_GROUP: { + HuffmanTreeGroup* hgroup = NULL; + switch (s->loop_counter) { + case 0: hgroup = &s->literal_hgroup; break; + case 1: hgroup = &s->insert_copy_hgroup; break; + case 2: hgroup = &s->distance_hgroup; break; + default: return BROTLI_SAVE_ERROR_CODE(BROTLI_FAILURE( + BROTLI_DECODER_ERROR_UNREACHABLE)); /* COV_NF_LINE */ + } + result = HuffmanTreeGroupDecode(hgroup, s); + if (result != BROTLI_DECODER_SUCCESS) break; + s->loop_counter++; + if (s->loop_counter < 3) { + break; + } + s->state = BROTLI_STATE_BEFORE_COMPRESSED_METABLOCK_BODY; + } + /* Fall through. */ + + case BROTLI_STATE_BEFORE_COMPRESSED_METABLOCK_BODY: + PrepareLiteralDecoding(s); + s->dist_context_map_slice = s->dist_context_map; + s->htree_command = s->insert_copy_hgroup.htrees[0]; + if (!BrotliEnsureRingBuffer(s)) { + result = BROTLI_FAILURE(BROTLI_DECODER_ERROR_ALLOC_RING_BUFFER_2); + break; + } + CalculateDistanceLut(s); + s->state = BROTLI_STATE_COMMAND_BEGIN; + /* Fall through. */ + + case BROTLI_STATE_COMMAND_BEGIN: + /* Fall through. */ + case BROTLI_STATE_COMMAND_INNER: + /* Fall through. */ + case BROTLI_STATE_COMMAND_POST_DECODE_LITERALS: + /* Fall through. */ + case BROTLI_STATE_COMMAND_POST_WRAP_COPY: + result = ProcessCommands(s); + if (result == BROTLI_DECODER_NEEDS_MORE_INPUT) { + result = SafeProcessCommands(s); + } + break; + + case BROTLI_STATE_COMMAND_INNER_WRITE: + /* Fall through. */ + case BROTLI_STATE_COMMAND_POST_WRITE_1: + /* Fall through. */ + case BROTLI_STATE_COMMAND_POST_WRITE_2: + result = WriteRingBuffer( + s, available_out, next_out, total_out, BROTLI_FALSE); + if (result != BROTLI_DECODER_SUCCESS) { + break; + } + WrapRingBuffer(s); + if (s->ringbuffer_size == 1 << s->window_bits) { + s->max_distance = s->max_backward_distance; + } + if (s->state == BROTLI_STATE_COMMAND_POST_WRITE_1) { + BrotliDecoderCompoundDictionary* addon = s->compound_dictionary; + if (addon && (addon->br_length != addon->br_copied)) { + s->pos += CopyFromCompoundDictionary(s, s->pos); + if (s->pos >= s->ringbuffer_size) continue; + } + if (s->meta_block_remaining_len == 0) { + /* Next metablock, if any. */ + s->state = BROTLI_STATE_METABLOCK_DONE; + } else { + s->state = BROTLI_STATE_COMMAND_BEGIN; + } + break; + } else if (s->state == BROTLI_STATE_COMMAND_POST_WRITE_2) { + s->state = BROTLI_STATE_COMMAND_POST_WRAP_COPY; + } else { /* BROTLI_STATE_COMMAND_INNER_WRITE */ + if (s->loop_counter == 0) { + if (s->meta_block_remaining_len == 0) { + s->state = BROTLI_STATE_METABLOCK_DONE; + } else { + s->state = BROTLI_STATE_COMMAND_POST_DECODE_LITERALS; + } + break; + } + s->state = BROTLI_STATE_COMMAND_INNER; + } + break; + + case BROTLI_STATE_METABLOCK_DONE: + if (s->meta_block_remaining_len < 0) { + result = BROTLI_FAILURE(BROTLI_DECODER_ERROR_FORMAT_BLOCK_LENGTH_2); + break; + } + BrotliDecoderStateCleanupAfterMetablock(s); + if (!s->is_last_metablock) { + s->state = BROTLI_STATE_METABLOCK_BEGIN; + break; + } + if (!BrotliJumpToByteBoundary(br)) { + result = BROTLI_FAILURE(BROTLI_DECODER_ERROR_FORMAT_PADDING_2); + break; + } + if (s->buffer_length == 0) { + BrotliBitReaderUnload(br); + *available_in = BrotliBitReaderGetAvailIn(br); + *next_in = br->next_in; + } + s->state = BROTLI_STATE_DONE; + /* Fall through. */ + + case BROTLI_STATE_DONE: + if (s->ringbuffer != 0) { + result = WriteRingBuffer( + s, available_out, next_out, total_out, BROTLI_TRUE); + if (result != BROTLI_DECODER_SUCCESS) { + break; + } + } + return BROTLI_SAVE_ERROR_CODE(result); + } + } + return BROTLI_SAVE_ERROR_CODE(result); +#undef BROTLI_SAVE_ERROR_CODE +} + +BROTLI_BOOL BrotliDecoderHasMoreOutput(const BrotliDecoderState* s) { + /* After unrecoverable error remaining output is considered nonsensical. */ + if ((int)s->error_code < 0) { + return BROTLI_FALSE; + } + return TO_BROTLI_BOOL( + s->ringbuffer != 0 && UnwrittenBytes(s, BROTLI_FALSE) != 0); +} + +const uint8_t* BrotliDecoderTakeOutput(BrotliDecoderState* s, size_t* size) { + uint8_t* result = 0; + size_t available_out = *size ? *size : 1u << 24; + size_t requested_out = available_out; + BrotliDecoderErrorCode status; + if ((s->ringbuffer == 0) || ((int)s->error_code < 0)) { + *size = 0; + return 0; + } + WrapRingBuffer(s); + status = WriteRingBuffer(s, &available_out, &result, 0, BROTLI_TRUE); + /* Either WriteRingBuffer returns those "success" codes... */ + if (status == BROTLI_DECODER_SUCCESS || + status == BROTLI_DECODER_NEEDS_MORE_OUTPUT) { + *size = requested_out - available_out; + } else { + /* ... or stream is broken. Normally this should be caught by + BrotliDecoderDecompressStream, this is just a safeguard. */ + if ((int)status < 0) SaveErrorCode(s, status, 0); + *size = 0; + result = 0; + } + return result; +} + +BROTLI_BOOL BrotliDecoderIsUsed(const BrotliDecoderState* s) { + return TO_BROTLI_BOOL(s->state != BROTLI_STATE_UNINITED || + BrotliGetAvailableBits(&s->br) != 0); +} + +BROTLI_BOOL BrotliDecoderIsFinished(const BrotliDecoderState* s) { + return TO_BROTLI_BOOL(s->state == BROTLI_STATE_DONE) && + !BrotliDecoderHasMoreOutput(s); +} + +BrotliDecoderErrorCode BrotliDecoderGetErrorCode(const BrotliDecoderState* s) { + return (BrotliDecoderErrorCode)s->error_code; +} + +const char* BrotliDecoderErrorString(BrotliDecoderErrorCode c) { + switch (c) { +#define BROTLI_ERROR_CODE_CASE_(PREFIX, NAME, CODE) \ + case BROTLI_DECODER ## PREFIX ## NAME: return #PREFIX #NAME; +#define BROTLI_NOTHING_ + BROTLI_DECODER_ERROR_CODES_LIST(BROTLI_ERROR_CODE_CASE_, BROTLI_NOTHING_) +#undef BROTLI_ERROR_CODE_CASE_ +#undef BROTLI_NOTHING_ + default: return "INVALID"; + } +} + +uint32_t BrotliDecoderVersion(void) { + return BROTLI_VERSION; +} + +void BrotliDecoderSetMetadataCallbacks( + BrotliDecoderState* state, + brotli_decoder_metadata_start_func start_func, + brotli_decoder_metadata_chunk_func chunk_func, void* opaque) { + state->metadata_start_func = start_func; + state->metadata_chunk_func = chunk_func; + state->metadata_callback_opaque = opaque; +} + +/* Escalate internal functions visibility; for testing purposes only. */ +#if defined(BROTLI_TEST) +BROTLI_BOOL BrotliSafeReadSymbolForTest( + const HuffmanCode*, BrotliBitReader*, brotli_reg_t*); +BROTLI_BOOL BrotliSafeReadSymbolForTest( + const HuffmanCode* table, BrotliBitReader* br, brotli_reg_t* result) { + return SafeReadSymbol(table, br, result); +} +void BrotliInverseMoveToFrontTransformForTest( + uint8_t*, brotli_reg_t, BrotliDecoderState*); +void BrotliInverseMoveToFrontTransformForTest( + uint8_t* v, brotli_reg_t l, BrotliDecoderState* s) { + InverseMoveToFrontTransform(v, l, s); +} +#endif + +#if defined(__cplusplus) || defined(c_plusplus) +} /* extern "C" */ +#endif diff --git a/Sources/CBrotliDec/dec/huffman.c b/Sources/CBrotliDec/dec/huffman.c new file mode 100644 index 0000000..06486cf --- /dev/null +++ b/Sources/CBrotliDec/dec/huffman.c @@ -0,0 +1,339 @@ +/* Copyright 2013 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +/* Utilities for building Huffman decoding tables. */ + +#include "huffman.h" + +#include "../common/constants.h" +#include "../common/platform.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +#define BROTLI_REVERSE_BITS_MAX 8 + +#if defined(BROTLI_RBIT) +#define BROTLI_REVERSE_BITS_BASE \ + ((sizeof(brotli_reg_t) << 3) - BROTLI_REVERSE_BITS_MAX) +#else +#define BROTLI_REVERSE_BITS_BASE 0 +static BROTLI_MODEL("small") +uint8_t kReverseBits[1 << BROTLI_REVERSE_BITS_MAX] = { + 0x00, 0x80, 0x40, 0xC0, 0x20, 0xA0, 0x60, 0xE0, + 0x10, 0x90, 0x50, 0xD0, 0x30, 0xB0, 0x70, 0xF0, + 0x08, 0x88, 0x48, 0xC8, 0x28, 0xA8, 0x68, 0xE8, + 0x18, 0x98, 0x58, 0xD8, 0x38, 0xB8, 0x78, 0xF8, + 0x04, 0x84, 0x44, 0xC4, 0x24, 0xA4, 0x64, 0xE4, + 0x14, 0x94, 0x54, 0xD4, 0x34, 0xB4, 0x74, 0xF4, + 0x0C, 0x8C, 0x4C, 0xCC, 0x2C, 0xAC, 0x6C, 0xEC, + 0x1C, 0x9C, 0x5C, 0xDC, 0x3C, 0xBC, 0x7C, 0xFC, + 0x02, 0x82, 0x42, 0xC2, 0x22, 0xA2, 0x62, 0xE2, + 0x12, 0x92, 0x52, 0xD2, 0x32, 0xB2, 0x72, 0xF2, + 0x0A, 0x8A, 0x4A, 0xCA, 0x2A, 0xAA, 0x6A, 0xEA, + 0x1A, 0x9A, 0x5A, 0xDA, 0x3A, 0xBA, 0x7A, 0xFA, + 0x06, 0x86, 0x46, 0xC6, 0x26, 0xA6, 0x66, 0xE6, + 0x16, 0x96, 0x56, 0xD6, 0x36, 0xB6, 0x76, 0xF6, + 0x0E, 0x8E, 0x4E, 0xCE, 0x2E, 0xAE, 0x6E, 0xEE, + 0x1E, 0x9E, 0x5E, 0xDE, 0x3E, 0xBE, 0x7E, 0xFE, + 0x01, 0x81, 0x41, 0xC1, 0x21, 0xA1, 0x61, 0xE1, + 0x11, 0x91, 0x51, 0xD1, 0x31, 0xB1, 0x71, 0xF1, + 0x09, 0x89, 0x49, 0xC9, 0x29, 0xA9, 0x69, 0xE9, + 0x19, 0x99, 0x59, 0xD9, 0x39, 0xB9, 0x79, 0xF9, + 0x05, 0x85, 0x45, 0xC5, 0x25, 0xA5, 0x65, 0xE5, + 0x15, 0x95, 0x55, 0xD5, 0x35, 0xB5, 0x75, 0xF5, + 0x0D, 0x8D, 0x4D, 0xCD, 0x2D, 0xAD, 0x6D, 0xED, + 0x1D, 0x9D, 0x5D, 0xDD, 0x3D, 0xBD, 0x7D, 0xFD, + 0x03, 0x83, 0x43, 0xC3, 0x23, 0xA3, 0x63, 0xE3, + 0x13, 0x93, 0x53, 0xD3, 0x33, 0xB3, 0x73, 0xF3, + 0x0B, 0x8B, 0x4B, 0xCB, 0x2B, 0xAB, 0x6B, 0xEB, + 0x1B, 0x9B, 0x5B, 0xDB, 0x3B, 0xBB, 0x7B, 0xFB, + 0x07, 0x87, 0x47, 0xC7, 0x27, 0xA7, 0x67, 0xE7, + 0x17, 0x97, 0x57, 0xD7, 0x37, 0xB7, 0x77, 0xF7, + 0x0F, 0x8F, 0x4F, 0xCF, 0x2F, 0xAF, 0x6F, 0xEF, + 0x1F, 0x9F, 0x5F, 0xDF, 0x3F, 0xBF, 0x7F, 0xFF +}; +#endif /* BROTLI_RBIT */ + +#define BROTLI_REVERSE_BITS_LOWEST \ + ((brotli_reg_t)1 << (BROTLI_REVERSE_BITS_MAX - 1 + BROTLI_REVERSE_BITS_BASE)) + +/* Returns reverse(num >> BROTLI_REVERSE_BITS_BASE, BROTLI_REVERSE_BITS_MAX), + where reverse(value, len) is the bit-wise reversal of the len least + significant bits of value. */ +static BROTLI_INLINE brotli_reg_t BrotliReverseBits(brotli_reg_t num) { +#if defined(BROTLI_RBIT) + return BROTLI_RBIT(num); +#else + return kReverseBits[num]; +#endif +} + +/* Stores code in table[0], table[step], table[2*step], ..., table[end] */ +/* Assumes that end is an integer multiple of step */ +static BROTLI_INLINE void ReplicateValue(HuffmanCode* table, + int step, int end, + HuffmanCode code) { + do { + end -= step; + table[end] = code; + } while (end > 0); +} + +/* Returns the table width of the next 2nd level table. |count| is the histogram + of bit lengths for the remaining symbols, |len| is the code length of the + next processed symbol. */ +static BROTLI_INLINE int NextTableBitSize(const uint16_t* const count, + int len, int root_bits) { + int left = 1 << (len - root_bits); + while (len < BROTLI_HUFFMAN_MAX_CODE_LENGTH) { + left -= count[len]; + if (left <= 0) break; + ++len; + left <<= 1; + } + return len - root_bits; +} + +void BrotliBuildCodeLengthsHuffmanTable(HuffmanCode* table, + const uint8_t* const code_lengths, + uint16_t* count) { + HuffmanCode code; /* current table entry */ + int symbol; /* symbol index in original or sorted table */ + brotli_reg_t key; /* prefix code */ + brotli_reg_t key_step; /* prefix code addend */ + int step; /* step size to replicate values in current table */ + int table_size; /* size of current table */ + int sorted[BROTLI_CODE_LENGTH_CODES]; /* symbols sorted by code length */ + /* offsets in sorted table for each length */ + int offset[BROTLI_HUFFMAN_MAX_CODE_LENGTH_CODE_LENGTH + 1]; + int bits; + int bits_count; + BROTLI_DCHECK(BROTLI_HUFFMAN_MAX_CODE_LENGTH_CODE_LENGTH <= + BROTLI_REVERSE_BITS_MAX); + BROTLI_DCHECK(BROTLI_HUFFMAN_MAX_CODE_LENGTH_CODE_LENGTH == 5); + + /* Generate offsets into sorted symbol table by code length. */ + symbol = -1; + bits = 1; + /* BROTLI_HUFFMAN_MAX_CODE_LENGTH_CODE_LENGTH == 5 */ + BROTLI_REPEAT_5({ + symbol += count[bits]; + offset[bits] = symbol; + bits++; + }); + /* Symbols with code length 0 are placed after all other symbols. */ + offset[0] = BROTLI_CODE_LENGTH_CODES - 1; + + /* Sort symbols by length, by symbol order within each length. */ + symbol = BROTLI_CODE_LENGTH_CODES; + do { + BROTLI_REPEAT_6({ + symbol--; + sorted[offset[code_lengths[symbol]]--] = symbol; + }); + } while (symbol != 0); + + table_size = 1 << BROTLI_HUFFMAN_MAX_CODE_LENGTH_CODE_LENGTH; + + /* Special case: all symbols but one have 0 code length. */ + if (offset[0] == 0) { + code = ConstructHuffmanCode(0, (uint16_t)sorted[0]); + for (key = 0; key < (brotli_reg_t)table_size; ++key) { + table[key] = code; + } + return; + } + + /* Fill in table. */ + key = 0; + key_step = BROTLI_REVERSE_BITS_LOWEST; + symbol = 0; + bits = 1; + step = 2; + do { + for (bits_count = count[bits]; bits_count != 0; --bits_count) { + code = ConstructHuffmanCode((uint8_t)bits, (uint16_t)sorted[symbol++]); + ReplicateValue(&table[BrotliReverseBits(key)], step, table_size, code); + key += key_step; + } + step <<= 1; + key_step >>= 1; + } while (++bits <= BROTLI_HUFFMAN_MAX_CODE_LENGTH_CODE_LENGTH); +} + +uint32_t BrotliBuildHuffmanTable(HuffmanCode* root_table, + int root_bits, + const uint16_t* const symbol_lists, + uint16_t* count) { + HuffmanCode code; /* current table entry */ + HuffmanCode* table; /* next available space in table */ + int len; /* current code length */ + int symbol; /* symbol index in original or sorted table */ + brotli_reg_t key; /* prefix code */ + brotli_reg_t key_step; /* prefix code addend */ + brotli_reg_t sub_key; /* 2nd level table prefix code */ + brotli_reg_t sub_key_step; /* 2nd level table prefix code addend */ + int step; /* step size to replicate values in current table */ + int table_bits; /* key length of current table */ + int table_size; /* size of current table */ + int total_size; /* sum of root table size and 2nd level table sizes */ + int max_length = -1; + int bits; + int bits_count; + + BROTLI_DCHECK(root_bits <= BROTLI_REVERSE_BITS_MAX); + BROTLI_DCHECK(BROTLI_HUFFMAN_MAX_CODE_LENGTH - root_bits <= + BROTLI_REVERSE_BITS_MAX); + + while (symbol_lists[max_length] == 0xFFFF) max_length--; + max_length += BROTLI_HUFFMAN_MAX_CODE_LENGTH + 1; + + table = root_table; + table_bits = root_bits; + table_size = 1 << table_bits; + total_size = table_size; + + /* Fill in the root table. Reduce the table size to if possible, + and create the repetitions by memcpy. */ + if (table_bits > max_length) { + table_bits = max_length; + table_size = 1 << table_bits; + } + key = 0; + key_step = BROTLI_REVERSE_BITS_LOWEST; + bits = 1; + step = 2; + do { + symbol = bits - (BROTLI_HUFFMAN_MAX_CODE_LENGTH + 1); + for (bits_count = count[bits]; bits_count != 0; --bits_count) { + symbol = symbol_lists[symbol]; + code = ConstructHuffmanCode((uint8_t)bits, (uint16_t)symbol); + ReplicateValue(&table[BrotliReverseBits(key)], step, table_size, code); + key += key_step; + } + step <<= 1; + key_step >>= 1; + } while (++bits <= table_bits); + + /* If root_bits != table_bits then replicate to fill the remaining slots. */ + while (total_size != table_size) { + memcpy(&table[table_size], &table[0], + (size_t)table_size * sizeof(table[0])); + table_size <<= 1; + } + + /* Fill in 2nd level tables and add pointers to root table. */ + key_step = BROTLI_REVERSE_BITS_LOWEST >> (root_bits - 1); + sub_key = (BROTLI_REVERSE_BITS_LOWEST << 1); + sub_key_step = BROTLI_REVERSE_BITS_LOWEST; + for (len = root_bits + 1, step = 2; len <= max_length; ++len) { + symbol = len - (BROTLI_HUFFMAN_MAX_CODE_LENGTH + 1); + for (; count[len] != 0; --count[len]) { + if (sub_key == (BROTLI_REVERSE_BITS_LOWEST << 1U)) { + table += table_size; + table_bits = NextTableBitSize(count, len, root_bits); + table_size = 1 << table_bits; + total_size += table_size; + sub_key = BrotliReverseBits(key); + key += key_step; + root_table[sub_key] = ConstructHuffmanCode( + (uint8_t)(table_bits + root_bits), + (uint16_t)(((size_t)(table - root_table)) - sub_key)); + sub_key = 0; + } + symbol = symbol_lists[symbol]; + code = ConstructHuffmanCode((uint8_t)(len - root_bits), (uint16_t)symbol); + ReplicateValue( + &table[BrotliReverseBits(sub_key)], step, table_size, code); + sub_key += sub_key_step; + } + step <<= 1; + sub_key_step >>= 1; + } + return (uint32_t)total_size; +} + +uint32_t BrotliBuildSimpleHuffmanTable(HuffmanCode* table, + int root_bits, + uint16_t* val, + uint32_t num_symbols) { + uint32_t table_size = 1; + const uint32_t goal_size = 1U << root_bits; + switch (num_symbols) { + case 0: + table[0] = ConstructHuffmanCode(0, val[0]); + break; + case 1: + if (val[1] > val[0]) { + table[0] = ConstructHuffmanCode(1, val[0]); + table[1] = ConstructHuffmanCode(1, val[1]); + } else { + table[0] = ConstructHuffmanCode(1, val[1]); + table[1] = ConstructHuffmanCode(1, val[0]); + } + table_size = 2; + break; + case 2: + table[0] = ConstructHuffmanCode(1, val[0]); + table[2] = ConstructHuffmanCode(1, val[0]); + if (val[2] > val[1]) { + table[1] = ConstructHuffmanCode(2, val[1]); + table[3] = ConstructHuffmanCode(2, val[2]); + } else { + table[1] = ConstructHuffmanCode(2, val[2]); + table[3] = ConstructHuffmanCode(2, val[1]); + } + table_size = 4; + break; + case 3: { + int i, k; + for (i = 0; i < 3; ++i) { + for (k = i + 1; k < 4; ++k) { + if (val[k] < val[i]) { + uint16_t t = val[k]; + val[k] = val[i]; + val[i] = t; + } + } + } + table[0] = ConstructHuffmanCode(2, val[0]); + table[2] = ConstructHuffmanCode(2, val[1]); + table[1] = ConstructHuffmanCode(2, val[2]); + table[3] = ConstructHuffmanCode(2, val[3]); + table_size = 4; + break; + } + case 4: { + if (val[3] < val[2]) { + uint16_t t = val[3]; + val[3] = val[2]; + val[2] = t; + } + table[0] = ConstructHuffmanCode(1, val[0]); + table[1] = ConstructHuffmanCode(2, val[1]); + table[2] = ConstructHuffmanCode(1, val[0]); + table[3] = ConstructHuffmanCode(3, val[2]); + table[4] = ConstructHuffmanCode(1, val[0]); + table[5] = ConstructHuffmanCode(2, val[1]); + table[6] = ConstructHuffmanCode(1, val[0]); + table[7] = ConstructHuffmanCode(3, val[3]); + table_size = 8; + break; + } + } + while (table_size != goal_size) { + memcpy(&table[table_size], &table[0], + (size_t)table_size * sizeof(table[0])); + table_size <<= 1; + } + return goal_size; +} + +#if defined(__cplusplus) || defined(c_plusplus) +} /* extern "C" */ +#endif diff --git a/Sources/CBrotliDec/dec/huffman.h b/Sources/CBrotliDec/dec/huffman.h new file mode 100644 index 0000000..53daf60 --- /dev/null +++ b/Sources/CBrotliDec/dec/huffman.h @@ -0,0 +1,120 @@ +/* Copyright 2013 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +/* Utilities for building Huffman decoding tables. */ + +#ifndef BROTLI_DEC_HUFFMAN_H_ +#define BROTLI_DEC_HUFFMAN_H_ + +#include "../common/platform.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +#define BROTLI_HUFFMAN_MAX_CODE_LENGTH 15 + +/* BROTLI_NUM_BLOCK_LEN_SYMBOLS == 26 */ +#define BROTLI_HUFFMAN_MAX_SIZE_26 396 +/* BROTLI_MAX_BLOCK_TYPE_SYMBOLS == 258 */ +#define BROTLI_HUFFMAN_MAX_SIZE_258 632 +/* BROTLI_MAX_CONTEXT_MAP_SYMBOLS == 272 */ +#define BROTLI_HUFFMAN_MAX_SIZE_272 646 + +#define BROTLI_HUFFMAN_MAX_CODE_LENGTH_CODE_LENGTH 5 + +#if ((defined(BROTLI_TARGET_ARMV7) || defined(BROTLI_TARGET_ARMV8_32)) && \ + BROTLI_GNUC_HAS_ATTRIBUTE(aligned, 2, 7, 0)) +#define BROTLI_HUFFMAN_CODE_FAST_LOAD +#endif + +#if !defined(BROTLI_HUFFMAN_CODE_FAST_LOAD) +/* Do not create this struct directly - use the ConstructHuffmanCode + * constructor below! */ +typedef struct { + uint8_t bits; /* number of bits used for this symbol */ + uint16_t value; /* symbol value or table offset */ +} HuffmanCode; + +static BROTLI_INLINE HuffmanCode ConstructHuffmanCode(const uint8_t bits, + const uint16_t value) { + HuffmanCode h; + h.bits = bits; + h.value = value; + return h; +} + +/* Please use the following macros to optimize HuffmanCode accesses in hot + * paths. + * + * For example, assuming |table| contains a HuffmanCode pointer: + * + * BROTLI_HC_MARK_TABLE_FOR_FAST_LOAD(table); + * BROTLI_HC_ADJUST_TABLE_INDEX(table, index_into_table); + * *bits = BROTLI_HC_GET_BITS(table); + * *value = BROTLI_HC_GET_VALUE(table); + * BROTLI_HC_ADJUST_TABLE_INDEX(table, offset); + * *bits2 = BROTLI_HC_GET_BITS(table); + * *value2 = BROTLI_HC_GET_VALUE(table); + * + */ + +#define BROTLI_HC_MARK_TABLE_FOR_FAST_LOAD(H) +#define BROTLI_HC_ADJUST_TABLE_INDEX(H, V) H += (V) + +/* These must be given a HuffmanCode pointer! */ +#define BROTLI_HC_FAST_LOAD_BITS(H) (H->bits) +#define BROTLI_HC_FAST_LOAD_VALUE(H) (H->value) + +#else /* BROTLI_HUFFMAN_CODE_FAST_LOAD */ + +typedef BROTLI_ALIGNED(4) uint32_t HuffmanCode; + +static BROTLI_INLINE HuffmanCode ConstructHuffmanCode(const uint8_t bits, + const uint16_t value) { + return (HuffmanCode) ((value & 0xFFFF) << 16) | (bits & 0xFF); +} + +#define BROTLI_HC_MARK_TABLE_FOR_FAST_LOAD(H) uint32_t __fastload_##H = (*H) +#define BROTLI_HC_ADJUST_TABLE_INDEX(H, V) H += (V); __fastload_##H = (*H) + +/* These must be given a HuffmanCode pointer! */ +#define BROTLI_HC_FAST_LOAD_BITS(H) ((__fastload_##H) & 0xFF) +#define BROTLI_HC_FAST_LOAD_VALUE(H) ((__fastload_##H) >> 16) +#endif /* BROTLI_HUFFMAN_CODE_FAST_LOAD */ + +/* Builds Huffman lookup table assuming code lengths are in symbol order. */ +BROTLI_INTERNAL void BrotliBuildCodeLengthsHuffmanTable(HuffmanCode* root_table, + const uint8_t* const code_lengths, uint16_t* count); + +/* Builds Huffman lookup table assuming code lengths are in symbol order. + Returns size of resulting table. */ +BROTLI_INTERNAL uint32_t BrotliBuildHuffmanTable(HuffmanCode* root_table, + int root_bits, const uint16_t* const symbol_lists, uint16_t* count); + +/* Builds a simple Huffman table. The |num_symbols| parameter is to be + interpreted as follows: 0 means 1 symbol, 1 means 2 symbols, + 2 means 3 symbols, 3 means 4 symbols with lengths [2, 2, 2, 2], + 4 means 4 symbols with lengths [1, 2, 3, 3]. */ +BROTLI_INTERNAL uint32_t BrotliBuildSimpleHuffmanTable(HuffmanCode* table, + int root_bits, uint16_t* symbols, uint32_t num_symbols); + +/* Contains a collection of Huffman trees with the same alphabet size. */ +/* alphabet_size_limit is needed due to simple codes, since + log2(alphabet_size_max) could be greater than log2(alphabet_size_limit). */ +typedef struct { + HuffmanCode** htrees; + HuffmanCode* codes; + uint16_t alphabet_size_max; + uint16_t alphabet_size_limit; + uint16_t num_htrees; +} HuffmanTreeGroup; + +#if defined(__cplusplus) || defined(c_plusplus) +} /* extern "C" */ +#endif + +#endif /* BROTLI_DEC_HUFFMAN_H_ */ diff --git a/Sources/CBrotliDec/dec/prefix.c b/Sources/CBrotliDec/dec/prefix.c new file mode 100644 index 0000000..ce3998f --- /dev/null +++ b/Sources/CBrotliDec/dec/prefix.c @@ -0,0 +1,67 @@ +/* Copyright 2025 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +#include "prefix.h" + +#include "../common/platform.h" /* IWYU pragma: keep */ +#include "../common/static_init.h" + +#if (BROTLI_STATIC_INIT != BROTLI_STATIC_INIT_NONE) +#include "../common/constants.h" +#endif + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +#if (BROTLI_STATIC_INIT == BROTLI_STATIC_INIT_NONE) +/* Embed kCmdLut. */ +#include "prefix_inc.h" +#else +BROTLI_COLD BROTLI_BOOL BrotliDecoderInitCmdLut(CmdLutElement* items) { + static const uint8_t kInsertLengthExtraBits[24] = { + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01, 0x02, 0x02, 0x03, 0x03, + 0x04, 0x04, 0x05, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0C, 0x0E, 0x18}; + static const uint8_t kCopyLengthExtraBits[24] = { + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01, 0x02, 0x02, + 0x03, 0x03, 0x04, 0x04, 0x05, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x18}; + static const uint8_t kCellPos[11] = {0, 1, 0, 1, 8, 9, 2, 16, 10, 17, 18}; + + uint16_t insert_length_offsets[24]; + uint16_t copy_length_offsets[24]; + insert_length_offsets[0] = 0; + copy_length_offsets[0] = 2; + for (size_t i = 0; i < 23; ++i) { + insert_length_offsets[i + 1] = + insert_length_offsets[i] + (uint16_t)(1u << kInsertLengthExtraBits[i]); + copy_length_offsets[i + 1] = + copy_length_offsets[i] + (uint16_t)(1u << kCopyLengthExtraBits[i]); + } + + for (size_t symbol = 0; symbol < BROTLI_NUM_COMMAND_SYMBOLS; ++symbol) { + CmdLutElement* item = items + symbol; + const size_t cell_idx = symbol >> 6; + const size_t cell_pos = kCellPos[cell_idx]; + const size_t copy_code = ((cell_pos << 3) & 0x18) + (symbol & 0x7); + const uint16_t copy_len_offset = copy_length_offsets[copy_code]; + const size_t insert_code = (cell_pos & 0x18) + ((symbol >> 3) & 0x7); + item->copy_len_extra_bits = kCopyLengthExtraBits[copy_code]; + item->context = (copy_len_offset > 4) ? 3 : ((uint8_t)copy_len_offset - 2); + item->copy_len_offset = copy_len_offset; + item->distance_code = (cell_idx >= 2) ? -1 : 0; + item->insert_len_extra_bits = kInsertLengthExtraBits[insert_code]; + item->insert_len_offset = insert_length_offsets[insert_code]; + } + return BROTLI_TRUE; +} + +BROTLI_MODEL("small") +CmdLutElement kCmdLut[BROTLI_NUM_COMMAND_SYMBOLS]; +#endif /* BROTLI_STATIC_INIT */ + +#if defined(__cplusplus) || defined(c_plusplus) +} /* extern "C" */ +#endif diff --git a/Sources/CBrotliDec/dec/prefix.h b/Sources/CBrotliDec/dec/prefix.h new file mode 100644 index 0000000..f45b8be --- /dev/null +++ b/Sources/CBrotliDec/dec/prefix.h @@ -0,0 +1,43 @@ +/* Copyright 2013 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +/* Lookup tables to map prefix codes to value ranges. This is used during + decoding of the block lengths, literal insertion lengths and copy lengths. */ + +#ifndef BROTLI_DEC_PREFIX_H_ +#define BROTLI_DEC_PREFIX_H_ + +#include "../common/constants.h" +#include "../common/platform.h" /* IWYU pragma: keep */ +#include "../common/static_init.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +typedef struct CmdLutElement { + uint8_t insert_len_extra_bits; + uint8_t copy_len_extra_bits; + int8_t distance_code; + uint8_t context; + uint16_t insert_len_offset; + uint16_t copy_len_offset; +} CmdLutElement; + +#if (BROTLI_STATIC_INIT == BROTLI_STATIC_INIT_NONE) +BROTLI_INTERNAL extern const BROTLI_MODEL("small") + CmdLutElement kCmdLut[BROTLI_NUM_COMMAND_SYMBOLS]; +#else +BROTLI_INTERNAL BROTLI_BOOL BrotliDecoderInitCmdLut(CmdLutElement* items); +BROTLI_INTERNAL extern BROTLI_MODEL("small") + CmdLutElement kCmdLut[BROTLI_NUM_COMMAND_SYMBOLS]; +#endif + +#if defined(__cplusplus) || defined(c_plusplus) +} /* extern "C" */ +#endif + +#endif /* BROTLI_DEC_PREFIX_H_ */ diff --git a/Sources/CBrotliDec/dec/prefix_inc.h b/Sources/CBrotliDec/dec/prefix_inc.h new file mode 100644 index 0000000..91d81b8 --- /dev/null +++ b/Sources/CBrotliDec/dec/prefix_inc.h @@ -0,0 +1,707 @@ +const BROTLI_MODEL("small") +CmdLutElement kCmdLut[BROTLI_NUM_COMMAND_SYMBOLS] = { + { 0x00, 0x00, 0, 0x00, 0x0000, 0x0002 }, + { 0x00, 0x00, 0, 0x01, 0x0000, 0x0003 }, + { 0x00, 0x00, 0, 0x02, 0x0000, 0x0004 }, + { 0x00, 0x00, 0, 0x03, 0x0000, 0x0005 }, + { 0x00, 0x00, 0, 0x03, 0x0000, 0x0006 }, + { 0x00, 0x00, 0, 0x03, 0x0000, 0x0007 }, + { 0x00, 0x00, 0, 0x03, 0x0000, 0x0008 }, + { 0x00, 0x00, 0, 0x03, 0x0000, 0x0009 }, + { 0x00, 0x00, 0, 0x00, 0x0001, 0x0002 }, + { 0x00, 0x00, 0, 0x01, 0x0001, 0x0003 }, + { 0x00, 0x00, 0, 0x02, 0x0001, 0x0004 }, + { 0x00, 0x00, 0, 0x03, 0x0001, 0x0005 }, + { 0x00, 0x00, 0, 0x03, 0x0001, 0x0006 }, + { 0x00, 0x00, 0, 0x03, 0x0001, 0x0007 }, + { 0x00, 0x00, 0, 0x03, 0x0001, 0x0008 }, + { 0x00, 0x00, 0, 0x03, 0x0001, 0x0009 }, + { 0x00, 0x00, 0, 0x00, 0x0002, 0x0002 }, + { 0x00, 0x00, 0, 0x01, 0x0002, 0x0003 }, + { 0x00, 0x00, 0, 0x02, 0x0002, 0x0004 }, + { 0x00, 0x00, 0, 0x03, 0x0002, 0x0005 }, + { 0x00, 0x00, 0, 0x03, 0x0002, 0x0006 }, + { 0x00, 0x00, 0, 0x03, 0x0002, 0x0007 }, + { 0x00, 0x00, 0, 0x03, 0x0002, 0x0008 }, + { 0x00, 0x00, 0, 0x03, 0x0002, 0x0009 }, + { 0x00, 0x00, 0, 0x00, 0x0003, 0x0002 }, + { 0x00, 0x00, 0, 0x01, 0x0003, 0x0003 }, + { 0x00, 0x00, 0, 0x02, 0x0003, 0x0004 }, + { 0x00, 0x00, 0, 0x03, 0x0003, 0x0005 }, + { 0x00, 0x00, 0, 0x03, 0x0003, 0x0006 }, + { 0x00, 0x00, 0, 0x03, 0x0003, 0x0007 }, + { 0x00, 0x00, 0, 0x03, 0x0003, 0x0008 }, + { 0x00, 0x00, 0, 0x03, 0x0003, 0x0009 }, + { 0x00, 0x00, 0, 0x00, 0x0004, 0x0002 }, + { 0x00, 0x00, 0, 0x01, 0x0004, 0x0003 }, + { 0x00, 0x00, 0, 0x02, 0x0004, 0x0004 }, + { 0x00, 0x00, 0, 0x03, 0x0004, 0x0005 }, + { 0x00, 0x00, 0, 0x03, 0x0004, 0x0006 }, + { 0x00, 0x00, 0, 0x03, 0x0004, 0x0007 }, + { 0x00, 0x00, 0, 0x03, 0x0004, 0x0008 }, + { 0x00, 0x00, 0, 0x03, 0x0004, 0x0009 }, + { 0x00, 0x00, 0, 0x00, 0x0005, 0x0002 }, + { 0x00, 0x00, 0, 0x01, 0x0005, 0x0003 }, + { 0x00, 0x00, 0, 0x02, 0x0005, 0x0004 }, + { 0x00, 0x00, 0, 0x03, 0x0005, 0x0005 }, + { 0x00, 0x00, 0, 0x03, 0x0005, 0x0006 }, + { 0x00, 0x00, 0, 0x03, 0x0005, 0x0007 }, + { 0x00, 0x00, 0, 0x03, 0x0005, 0x0008 }, + { 0x00, 0x00, 0, 0x03, 0x0005, 0x0009 }, + { 0x01, 0x00, 0, 0x00, 0x0006, 0x0002 }, + { 0x01, 0x00, 0, 0x01, 0x0006, 0x0003 }, + { 0x01, 0x00, 0, 0x02, 0x0006, 0x0004 }, + { 0x01, 0x00, 0, 0x03, 0x0006, 0x0005 }, + { 0x01, 0x00, 0, 0x03, 0x0006, 0x0006 }, + { 0x01, 0x00, 0, 0x03, 0x0006, 0x0007 }, + { 0x01, 0x00, 0, 0x03, 0x0006, 0x0008 }, + { 0x01, 0x00, 0, 0x03, 0x0006, 0x0009 }, + { 0x01, 0x00, 0, 0x00, 0x0008, 0x0002 }, + { 0x01, 0x00, 0, 0x01, 0x0008, 0x0003 }, + { 0x01, 0x00, 0, 0x02, 0x0008, 0x0004 }, + { 0x01, 0x00, 0, 0x03, 0x0008, 0x0005 }, + { 0x01, 0x00, 0, 0x03, 0x0008, 0x0006 }, + { 0x01, 0x00, 0, 0x03, 0x0008, 0x0007 }, + { 0x01, 0x00, 0, 0x03, 0x0008, 0x0008 }, + { 0x01, 0x00, 0, 0x03, 0x0008, 0x0009 }, + { 0x00, 0x01, 0, 0x03, 0x0000, 0x000a }, + { 0x00, 0x01, 0, 0x03, 0x0000, 0x000c }, + { 0x00, 0x02, 0, 0x03, 0x0000, 0x000e }, + { 0x00, 0x02, 0, 0x03, 0x0000, 0x0012 }, + { 0x00, 0x03, 0, 0x03, 0x0000, 0x0016 }, + { 0x00, 0x03, 0, 0x03, 0x0000, 0x001e }, + { 0x00, 0x04, 0, 0x03, 0x0000, 0x0026 }, + { 0x00, 0x04, 0, 0x03, 0x0000, 0x0036 }, + { 0x00, 0x01, 0, 0x03, 0x0001, 0x000a }, + { 0x00, 0x01, 0, 0x03, 0x0001, 0x000c }, + { 0x00, 0x02, 0, 0x03, 0x0001, 0x000e }, + { 0x00, 0x02, 0, 0x03, 0x0001, 0x0012 }, + { 0x00, 0x03, 0, 0x03, 0x0001, 0x0016 }, + { 0x00, 0x03, 0, 0x03, 0x0001, 0x001e }, + { 0x00, 0x04, 0, 0x03, 0x0001, 0x0026 }, + { 0x00, 0x04, 0, 0x03, 0x0001, 0x0036 }, + { 0x00, 0x01, 0, 0x03, 0x0002, 0x000a }, + { 0x00, 0x01, 0, 0x03, 0x0002, 0x000c }, + { 0x00, 0x02, 0, 0x03, 0x0002, 0x000e }, + { 0x00, 0x02, 0, 0x03, 0x0002, 0x0012 }, + { 0x00, 0x03, 0, 0x03, 0x0002, 0x0016 }, + { 0x00, 0x03, 0, 0x03, 0x0002, 0x001e }, + { 0x00, 0x04, 0, 0x03, 0x0002, 0x0026 }, + { 0x00, 0x04, 0, 0x03, 0x0002, 0x0036 }, + { 0x00, 0x01, 0, 0x03, 0x0003, 0x000a }, + { 0x00, 0x01, 0, 0x03, 0x0003, 0x000c }, + { 0x00, 0x02, 0, 0x03, 0x0003, 0x000e }, + { 0x00, 0x02, 0, 0x03, 0x0003, 0x0012 }, + { 0x00, 0x03, 0, 0x03, 0x0003, 0x0016 }, + { 0x00, 0x03, 0, 0x03, 0x0003, 0x001e }, + { 0x00, 0x04, 0, 0x03, 0x0003, 0x0026 }, + { 0x00, 0x04, 0, 0x03, 0x0003, 0x0036 }, + { 0x00, 0x01, 0, 0x03, 0x0004, 0x000a }, + { 0x00, 0x01, 0, 0x03, 0x0004, 0x000c }, + { 0x00, 0x02, 0, 0x03, 0x0004, 0x000e }, + { 0x00, 0x02, 0, 0x03, 0x0004, 0x0012 }, + { 0x00, 0x03, 0, 0x03, 0x0004, 0x0016 }, + { 0x00, 0x03, 0, 0x03, 0x0004, 0x001e }, + { 0x00, 0x04, 0, 0x03, 0x0004, 0x0026 }, + { 0x00, 0x04, 0, 0x03, 0x0004, 0x0036 }, + { 0x00, 0x01, 0, 0x03, 0x0005, 0x000a }, + { 0x00, 0x01, 0, 0x03, 0x0005, 0x000c }, + { 0x00, 0x02, 0, 0x03, 0x0005, 0x000e }, + { 0x00, 0x02, 0, 0x03, 0x0005, 0x0012 }, + { 0x00, 0x03, 0, 0x03, 0x0005, 0x0016 }, + { 0x00, 0x03, 0, 0x03, 0x0005, 0x001e }, + { 0x00, 0x04, 0, 0x03, 0x0005, 0x0026 }, + { 0x00, 0x04, 0, 0x03, 0x0005, 0x0036 }, + { 0x01, 0x01, 0, 0x03, 0x0006, 0x000a }, + { 0x01, 0x01, 0, 0x03, 0x0006, 0x000c }, + { 0x01, 0x02, 0, 0x03, 0x0006, 0x000e }, + { 0x01, 0x02, 0, 0x03, 0x0006, 0x0012 }, + { 0x01, 0x03, 0, 0x03, 0x0006, 0x0016 }, + { 0x01, 0x03, 0, 0x03, 0x0006, 0x001e }, + { 0x01, 0x04, 0, 0x03, 0x0006, 0x0026 }, + { 0x01, 0x04, 0, 0x03, 0x0006, 0x0036 }, + { 0x01, 0x01, 0, 0x03, 0x0008, 0x000a }, + { 0x01, 0x01, 0, 0x03, 0x0008, 0x000c }, + { 0x01, 0x02, 0, 0x03, 0x0008, 0x000e }, + { 0x01, 0x02, 0, 0x03, 0x0008, 0x0012 }, + { 0x01, 0x03, 0, 0x03, 0x0008, 0x0016 }, + { 0x01, 0x03, 0, 0x03, 0x0008, 0x001e }, + { 0x01, 0x04, 0, 0x03, 0x0008, 0x0026 }, + { 0x01, 0x04, 0, 0x03, 0x0008, 0x0036 }, + { 0x00, 0x00, -1, 0x00, 0x0000, 0x0002 }, + { 0x00, 0x00, -1, 0x01, 0x0000, 0x0003 }, + { 0x00, 0x00, -1, 0x02, 0x0000, 0x0004 }, + { 0x00, 0x00, -1, 0x03, 0x0000, 0x0005 }, + { 0x00, 0x00, -1, 0x03, 0x0000, 0x0006 }, + { 0x00, 0x00, -1, 0x03, 0x0000, 0x0007 }, + { 0x00, 0x00, -1, 0x03, 0x0000, 0x0008 }, + { 0x00, 0x00, -1, 0x03, 0x0000, 0x0009 }, + { 0x00, 0x00, -1, 0x00, 0x0001, 0x0002 }, + { 0x00, 0x00, -1, 0x01, 0x0001, 0x0003 }, + { 0x00, 0x00, -1, 0x02, 0x0001, 0x0004 }, + { 0x00, 0x00, -1, 0x03, 0x0001, 0x0005 }, + { 0x00, 0x00, -1, 0x03, 0x0001, 0x0006 }, + { 0x00, 0x00, -1, 0x03, 0x0001, 0x0007 }, + { 0x00, 0x00, -1, 0x03, 0x0001, 0x0008 }, + { 0x00, 0x00, -1, 0x03, 0x0001, 0x0009 }, + { 0x00, 0x00, -1, 0x00, 0x0002, 0x0002 }, + { 0x00, 0x00, -1, 0x01, 0x0002, 0x0003 }, + { 0x00, 0x00, -1, 0x02, 0x0002, 0x0004 }, + { 0x00, 0x00, -1, 0x03, 0x0002, 0x0005 }, + { 0x00, 0x00, -1, 0x03, 0x0002, 0x0006 }, + { 0x00, 0x00, -1, 0x03, 0x0002, 0x0007 }, + { 0x00, 0x00, -1, 0x03, 0x0002, 0x0008 }, + { 0x00, 0x00, -1, 0x03, 0x0002, 0x0009 }, + { 0x00, 0x00, -1, 0x00, 0x0003, 0x0002 }, + { 0x00, 0x00, -1, 0x01, 0x0003, 0x0003 }, + { 0x00, 0x00, -1, 0x02, 0x0003, 0x0004 }, + { 0x00, 0x00, -1, 0x03, 0x0003, 0x0005 }, + { 0x00, 0x00, -1, 0x03, 0x0003, 0x0006 }, + { 0x00, 0x00, -1, 0x03, 0x0003, 0x0007 }, + { 0x00, 0x00, -1, 0x03, 0x0003, 0x0008 }, + { 0x00, 0x00, -1, 0x03, 0x0003, 0x0009 }, + { 0x00, 0x00, -1, 0x00, 0x0004, 0x0002 }, + { 0x00, 0x00, -1, 0x01, 0x0004, 0x0003 }, + { 0x00, 0x00, -1, 0x02, 0x0004, 0x0004 }, + { 0x00, 0x00, -1, 0x03, 0x0004, 0x0005 }, + { 0x00, 0x00, -1, 0x03, 0x0004, 0x0006 }, + { 0x00, 0x00, -1, 0x03, 0x0004, 0x0007 }, + { 0x00, 0x00, -1, 0x03, 0x0004, 0x0008 }, + { 0x00, 0x00, -1, 0x03, 0x0004, 0x0009 }, + { 0x00, 0x00, -1, 0x00, 0x0005, 0x0002 }, + { 0x00, 0x00, -1, 0x01, 0x0005, 0x0003 }, + { 0x00, 0x00, -1, 0x02, 0x0005, 0x0004 }, + { 0x00, 0x00, -1, 0x03, 0x0005, 0x0005 }, + { 0x00, 0x00, -1, 0x03, 0x0005, 0x0006 }, + { 0x00, 0x00, -1, 0x03, 0x0005, 0x0007 }, + { 0x00, 0x00, -1, 0x03, 0x0005, 0x0008 }, + { 0x00, 0x00, -1, 0x03, 0x0005, 0x0009 }, + { 0x01, 0x00, -1, 0x00, 0x0006, 0x0002 }, + { 0x01, 0x00, -1, 0x01, 0x0006, 0x0003 }, + { 0x01, 0x00, -1, 0x02, 0x0006, 0x0004 }, + { 0x01, 0x00, -1, 0x03, 0x0006, 0x0005 }, + { 0x01, 0x00, -1, 0x03, 0x0006, 0x0006 }, + { 0x01, 0x00, -1, 0x03, 0x0006, 0x0007 }, + { 0x01, 0x00, -1, 0x03, 0x0006, 0x0008 }, + { 0x01, 0x00, -1, 0x03, 0x0006, 0x0009 }, + { 0x01, 0x00, -1, 0x00, 0x0008, 0x0002 }, + { 0x01, 0x00, -1, 0x01, 0x0008, 0x0003 }, + { 0x01, 0x00, -1, 0x02, 0x0008, 0x0004 }, + { 0x01, 0x00, -1, 0x03, 0x0008, 0x0005 }, + { 0x01, 0x00, -1, 0x03, 0x0008, 0x0006 }, + { 0x01, 0x00, -1, 0x03, 0x0008, 0x0007 }, + { 0x01, 0x00, -1, 0x03, 0x0008, 0x0008 }, + { 0x01, 0x00, -1, 0x03, 0x0008, 0x0009 }, + { 0x00, 0x01, -1, 0x03, 0x0000, 0x000a }, + { 0x00, 0x01, -1, 0x03, 0x0000, 0x000c }, + { 0x00, 0x02, -1, 0x03, 0x0000, 0x000e }, + { 0x00, 0x02, -1, 0x03, 0x0000, 0x0012 }, + { 0x00, 0x03, -1, 0x03, 0x0000, 0x0016 }, + { 0x00, 0x03, -1, 0x03, 0x0000, 0x001e }, + { 0x00, 0x04, -1, 0x03, 0x0000, 0x0026 }, + { 0x00, 0x04, -1, 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0x0146 }, + { 0x07, 0x09, -1, 0x03, 0x00c2, 0x0246 }, + { 0x07, 0x0a, -1, 0x03, 0x00c2, 0x0446 }, + { 0x07, 0x18, -1, 0x03, 0x00c2, 0x0846 }, + { 0x08, 0x05, -1, 0x03, 0x0142, 0x0046 }, + { 0x08, 0x05, -1, 0x03, 0x0142, 0x0066 }, + { 0x08, 0x06, -1, 0x03, 0x0142, 0x0086 }, + { 0x08, 0x07, -1, 0x03, 0x0142, 0x00c6 }, + { 0x08, 0x08, -1, 0x03, 0x0142, 0x0146 }, + { 0x08, 0x09, -1, 0x03, 0x0142, 0x0246 }, + { 0x08, 0x0a, -1, 0x03, 0x0142, 0x0446 }, + { 0x08, 0x18, -1, 0x03, 0x0142, 0x0846 }, + { 0x09, 0x05, -1, 0x03, 0x0242, 0x0046 }, + { 0x09, 0x05, -1, 0x03, 0x0242, 0x0066 }, + { 0x09, 0x06, -1, 0x03, 0x0242, 0x0086 }, + { 0x09, 0x07, -1, 0x03, 0x0242, 0x00c6 }, + { 0x09, 0x08, -1, 0x03, 0x0242, 0x0146 }, + { 0x09, 0x09, -1, 0x03, 0x0242, 0x0246 }, + { 0x09, 0x0a, -1, 0x03, 0x0242, 0x0446 }, + { 0x09, 0x18, -1, 0x03, 0x0242, 0x0846 }, + { 0x0a, 0x05, -1, 0x03, 0x0442, 0x0046 }, + { 0x0a, 0x05, -1, 0x03, 0x0442, 0x0066 }, + { 0x0a, 0x06, -1, 0x03, 0x0442, 0x0086 }, + { 0x0a, 0x07, -1, 0x03, 0x0442, 0x00c6 }, + { 0x0a, 0x08, -1, 0x03, 0x0442, 0x0146 }, + { 0x0a, 0x09, -1, 0x03, 0x0442, 0x0246 }, + { 0x0a, 0x0a, -1, 0x03, 0x0442, 0x0446 }, + { 0x0a, 0x18, -1, 0x03, 0x0442, 0x0846 }, + { 0x0c, 0x05, -1, 0x03, 0x0842, 0x0046 }, + { 0x0c, 0x05, -1, 0x03, 0x0842, 0x0066 }, + { 0x0c, 0x06, -1, 0x03, 0x0842, 0x0086 }, + { 0x0c, 0x07, -1, 0x03, 0x0842, 0x00c6 }, + { 0x0c, 0x08, -1, 0x03, 0x0842, 0x0146 }, + { 0x0c, 0x09, -1, 0x03, 0x0842, 0x0246 }, + { 0x0c, 0x0a, -1, 0x03, 0x0842, 0x0446 }, + { 0x0c, 0x18, -1, 0x03, 0x0842, 0x0846 }, + { 0x0e, 0x05, -1, 0x03, 0x1842, 0x0046 }, + { 0x0e, 0x05, -1, 0x03, 0x1842, 0x0066 }, + { 0x0e, 0x06, -1, 0x03, 0x1842, 0x0086 }, + { 0x0e, 0x07, -1, 0x03, 0x1842, 0x00c6 }, + { 0x0e, 0x08, -1, 0x03, 0x1842, 0x0146 }, + { 0x0e, 0x09, -1, 0x03, 0x1842, 0x0246 }, + { 0x0e, 0x0a, -1, 0x03, 0x1842, 0x0446 }, + { 0x0e, 0x18, -1, 0x03, 0x1842, 0x0846 }, + { 0x18, 0x05, -1, 0x03, 0x5842, 0x0046 }, + { 0x18, 0x05, -1, 0x03, 0x5842, 0x0066 }, + { 0x18, 0x06, -1, 0x03, 0x5842, 0x0086 }, + { 0x18, 0x07, -1, 0x03, 0x5842, 0x00c6 }, + { 0x18, 0x08, -1, 0x03, 0x5842, 0x0146 }, + { 0x18, 0x09, -1, 0x03, 0x5842, 0x0246 }, + { 0x18, 0x0a, -1, 0x03, 0x5842, 0x0446 }, + { 0x18, 0x18, -1, 0x03, 0x5842, 0x0846 }, +}; diff --git a/Sources/CBrotliDec/dec/state.c b/Sources/CBrotliDec/dec/state.c new file mode 100644 index 0000000..dcf61b9 --- /dev/null +++ b/Sources/CBrotliDec/dec/state.c @@ -0,0 +1,186 @@ +/* Copyright 2015 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +#include "state.h" + +#include "../common/dictionary.h" +#include "../common/platform.h" +#include "huffman.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +#ifdef BROTLI_REPORTING +/* When BROTLI_REPORTING is defined extra reporting module have to be linked. */ +void BrotliDecoderOnStart(const BrotliDecoderState* s); +void BrotliDecoderOnFinish(const BrotliDecoderState* s); +#define BROTLI_DECODER_ON_START(s) BrotliDecoderOnStart(s); +#define BROTLI_DECODER_ON_FINISH(s) BrotliDecoderOnFinish(s); +#else +#if !defined(BROTLI_DECODER_ON_START) +#define BROTLI_DECODER_ON_START(s) (void)(s); +#endif +#if !defined(BROTLI_DECODER_ON_FINISH) +#define BROTLI_DECODER_ON_FINISH(s) (void)(s); +#endif +#endif + +BROTLI_BOOL BrotliDecoderStateInit(BrotliDecoderState* s, + brotli_alloc_func alloc_func, brotli_free_func free_func, void* opaque) { + BROTLI_DECODER_ON_START(s); + if (!alloc_func) { + s->alloc_func = BrotliDefaultAllocFunc; + s->free_func = BrotliDefaultFreeFunc; + s->memory_manager_opaque = 0; + } else { + s->alloc_func = alloc_func; + s->free_func = free_func; + s->memory_manager_opaque = opaque; + } + + s->error_code = 0; /* BROTLI_DECODER_NO_ERROR */ + + BrotliInitBitReader(&s->br); + s->state = BROTLI_STATE_UNINITED; + s->large_window = 0; + s->substate_metablock_header = BROTLI_STATE_METABLOCK_HEADER_NONE; + s->substate_uncompressed = BROTLI_STATE_UNCOMPRESSED_NONE; + s->substate_decode_uint8 = BROTLI_STATE_DECODE_UINT8_NONE; + s->substate_read_block_length = BROTLI_STATE_READ_BLOCK_LENGTH_NONE; + + s->buffer_length = 0; + s->loop_counter = 0; + s->pos = 0; + s->rb_roundtrips = 0; + s->partial_pos_out = 0; + s->used_input = 0; + + s->block_type_trees = NULL; + s->block_len_trees = NULL; + s->ringbuffer = NULL; + s->ringbuffer_size = 0; + s->new_ringbuffer_size = 0; + s->ringbuffer_mask = 0; + + s->context_map = NULL; + s->context_modes = NULL; + s->dist_context_map = NULL; + s->context_map_slice = NULL; + s->dist_context_map_slice = NULL; + + s->literal_hgroup.codes = NULL; + s->literal_hgroup.htrees = NULL; + s->insert_copy_hgroup.codes = NULL; + s->insert_copy_hgroup.htrees = NULL; + s->distance_hgroup.codes = NULL; + s->distance_hgroup.htrees = NULL; + + s->is_last_metablock = 0; + s->is_uncompressed = 0; + s->is_metadata = 0; + s->should_wrap_ringbuffer = 0; + s->canny_ringbuffer_allocation = 1; + + s->window_bits = 0; + s->max_distance = 0; + s->dist_rb[0] = 16; + s->dist_rb[1] = 15; + s->dist_rb[2] = 11; + s->dist_rb[3] = 4; + s->dist_rb_idx = 0; + s->block_type_trees = NULL; + s->block_len_trees = NULL; + + s->mtf_upper_bound = 63; + + s->compound_dictionary = NULL; + s->dictionary = + BrotliSharedDictionaryCreateInstance(alloc_func, free_func, opaque); + if (!s->dictionary) return BROTLI_FALSE; + + s->metadata_start_func = NULL; + s->metadata_chunk_func = NULL; + s->metadata_callback_opaque = 0; + + return BROTLI_TRUE; +} + +void BrotliDecoderStateMetablockBegin(BrotliDecoderState* s) { + s->meta_block_remaining_len = 0; + s->block_length[0] = BROTLI_BLOCK_SIZE_CAP; + s->block_length[1] = BROTLI_BLOCK_SIZE_CAP; + s->block_length[2] = BROTLI_BLOCK_SIZE_CAP; + s->num_block_types[0] = 1; + s->num_block_types[1] = 1; + s->num_block_types[2] = 1; + s->block_type_rb[0] = 1; + s->block_type_rb[1] = 0; + s->block_type_rb[2] = 1; + s->block_type_rb[3] = 0; + s->block_type_rb[4] = 1; + s->block_type_rb[5] = 0; + s->context_map = NULL; + s->context_modes = NULL; + s->dist_context_map = NULL; + s->context_map_slice = NULL; + s->literal_htree = NULL; + s->dist_context_map_slice = NULL; + s->dist_htree_index = 0; + s->context_lookup = NULL; + s->literal_hgroup.codes = NULL; + s->literal_hgroup.htrees = NULL; + s->insert_copy_hgroup.codes = NULL; + s->insert_copy_hgroup.htrees = NULL; + s->distance_hgroup.codes = NULL; + s->distance_hgroup.htrees = NULL; +} + +void BrotliDecoderStateCleanupAfterMetablock(BrotliDecoderState* s) { + BROTLI_DECODER_FREE(s, s->context_modes); + BROTLI_DECODER_FREE(s, s->context_map); + BROTLI_DECODER_FREE(s, s->dist_context_map); + BROTLI_DECODER_FREE(s, s->literal_hgroup.htrees); + BROTLI_DECODER_FREE(s, s->insert_copy_hgroup.htrees); + BROTLI_DECODER_FREE(s, s->distance_hgroup.htrees); +} + +void BrotliDecoderStateCleanup(BrotliDecoderState* s) { + BrotliDecoderStateCleanupAfterMetablock(s); + + BROTLI_DECODER_ON_FINISH(s); + + BROTLI_DECODER_FREE(s, s->compound_dictionary); + BrotliSharedDictionaryDestroyInstance(s->dictionary); + s->dictionary = NULL; + BROTLI_DECODER_FREE(s, s->ringbuffer); + BROTLI_DECODER_FREE(s, s->block_type_trees); +} + +BROTLI_BOOL BrotliDecoderHuffmanTreeGroupInit(BrotliDecoderState* s, + HuffmanTreeGroup* group, brotli_reg_t alphabet_size_max, + brotli_reg_t alphabet_size_limit, brotli_reg_t ntrees) { + /* 376 = 256 (1-st level table) + 4 + 7 + 15 + 31 + 63 (2-nd level mix-tables) + This number is discovered "unlimited" "enough" calculator; it is actually + a wee bigger than required in several cases (especially for alphabets with + less than 16 symbols). */ + const size_t max_table_size = alphabet_size_limit + 376; + const size_t code_size = sizeof(HuffmanCode) * ntrees * max_table_size; + const size_t htree_size = sizeof(HuffmanCode*) * ntrees; + /* Pointer alignment is, hopefully, wider than sizeof(HuffmanCode). */ + HuffmanCode** p = (HuffmanCode**)BROTLI_DECODER_ALLOC(s, + code_size + htree_size); + group->alphabet_size_max = (uint16_t)alphabet_size_max; + group->alphabet_size_limit = (uint16_t)alphabet_size_limit; + group->num_htrees = (uint16_t)ntrees; + group->htrees = p; + group->codes = p ? (HuffmanCode*)(&p[ntrees]) : NULL; + return !!p; +} + +#if defined(__cplusplus) || defined(c_plusplus) +} /* extern "C" */ +#endif diff --git a/Sources/CBrotliDec/dec/state.h b/Sources/CBrotliDec/dec/state.h new file mode 100644 index 0000000..aa371fb --- /dev/null +++ b/Sources/CBrotliDec/dec/state.h @@ -0,0 +1,396 @@ +/* Copyright 2015 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +/* Brotli state for partial streaming decoding. */ + +#ifndef BROTLI_DEC_STATE_H_ +#define BROTLI_DEC_STATE_H_ + +#include "../common/constants.h" +#include "../common/platform.h" +#include +#include +#include "bit_reader.h" +#include "huffman.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +/* Graphviz diagram that describes state transitions: + +digraph States { + graph [compound=true] + concentrate=true + node [shape="box"] + + UNINITED -> {LARGE_WINDOW_BITS -> INITIALIZE} + subgraph cluster_metablock_workflow { + style="rounded" + label=< METABLOCK CYCLE > + METABLOCK_BEGIN -> METABLOCK_HEADER + METABLOCK_HEADER:sw -> METADATA + METABLOCK_HEADER:s -> UNCOMPRESSED + METABLOCK_HEADER:se -> METABLOCK_DONE:ne + METADATA:s -> METABLOCK_DONE:w + UNCOMPRESSED:s -> METABLOCK_DONE:n + METABLOCK_DONE:e -> METABLOCK_BEGIN:e [constraint="false"] + } + INITIALIZE -> METABLOCK_BEGIN + METABLOCK_DONE -> DONE + + subgraph cluster_compressed_metablock { + style="rounded" + label=< COMPRESSED METABLOCK > + + subgraph cluster_command { + style="rounded" + label=< HOT LOOP > + + _METABLOCK_DONE_PORT_ [shape=point style=invis] + + { + // Set different shape for nodes returning from "compressed metablock". + node [shape=invhouse]; CMD_INNER CMD_POST_DECODE_LITERALS; + CMD_POST_WRAP_COPY; CMD_INNER_WRITE; CMD_POST_WRITE_1; + } + + CMD_BEGIN -> CMD_INNER -> CMD_POST_DECODE_LITERALS -> CMD_POST_WRAP_COPY + + // IO ("write") nodes are not in the hot loop! + CMD_INNER_WRITE [style=dashed] + CMD_INNER -> CMD_INNER_WRITE + CMD_POST_WRITE_1 [style=dashed] + CMD_POST_DECODE_LITERALS -> CMD_POST_WRITE_1 + CMD_POST_WRITE_2 [style=dashed] + CMD_POST_WRAP_COPY -> CMD_POST_WRITE_2 + + CMD_POST_WRITE_1 -> CMD_BEGIN:s [constraint="false"] + CMD_INNER_WRITE -> {CMD_INNER CMD_POST_DECODE_LITERALS} + [constraint="false"] + CMD_BEGIN:ne -> CMD_POST_DECODE_LITERALS [constraint="false"] + CMD_POST_WRAP_COPY -> CMD_BEGIN [constraint="false"] + CMD_POST_DECODE_LITERALS -> CMD_BEGIN:ne [constraint="false"] + CMD_POST_WRITE_2 -> CMD_POST_WRAP_COPY [constraint="false"] + {rank=same; CMD_BEGIN; CMD_INNER; CMD_POST_DECODE_LITERALS; + CMD_POST_WRAP_COPY} + {rank=same; CMD_INNER_WRITE; CMD_POST_WRITE_1; CMD_POST_WRITE_2} + + {CMD_INNER CMD_POST_DECODE_LITERALS CMD_POST_WRAP_COPY} -> + _METABLOCK_DONE_PORT_ [style=invis] + {CMD_INNER_WRITE CMD_POST_WRITE_1} -> _METABLOCK_DONE_PORT_ + [constraint="false" style=invis] + } + + BEFORE_COMPRESSED_METABLOCK_HEADER:s -> HUFFMAN_CODE_0:n + HUFFMAN_CODE_0 -> HUFFMAN_CODE_1 -> HUFFMAN_CODE_2 -> HUFFMAN_CODE_3 + HUFFMAN_CODE_0 -> METABLOCK_HEADER_2 -> CONTEXT_MODES -> CONTEXT_MAP_1 + CONTEXT_MAP_1 -> CONTEXT_MAP_2 -> TREE_GROUP + TREE_GROUP -> BEFORE_COMPRESSED_METABLOCK_BODY:e + BEFORE_COMPRESSED_METABLOCK_BODY:s -> CMD_BEGIN:n + + HUFFMAN_CODE_3:e -> HUFFMAN_CODE_0:ne [constraint="false"] + {rank=same; HUFFMAN_CODE_0; HUFFMAN_CODE_1; HUFFMAN_CODE_2; HUFFMAN_CODE_3} + {rank=same; METABLOCK_HEADER_2; CONTEXT_MODES; CONTEXT_MAP_1; CONTEXT_MAP_2; + TREE_GROUP} + } + METABLOCK_HEADER:e -> BEFORE_COMPRESSED_METABLOCK_HEADER:n + + _METABLOCK_DONE_PORT_ -> METABLOCK_DONE:se + [constraint="false" ltail=cluster_command] + + UNINITED [shape=Mdiamond]; + DONE [shape=Msquare]; +} + + + */ + +typedef enum { + BROTLI_STATE_UNINITED, + BROTLI_STATE_LARGE_WINDOW_BITS, + BROTLI_STATE_INITIALIZE, + BROTLI_STATE_METABLOCK_BEGIN, + BROTLI_STATE_METABLOCK_HEADER, + BROTLI_STATE_METABLOCK_HEADER_2, + BROTLI_STATE_CONTEXT_MODES, + BROTLI_STATE_COMMAND_BEGIN, + BROTLI_STATE_COMMAND_INNER, + BROTLI_STATE_COMMAND_POST_DECODE_LITERALS, + BROTLI_STATE_COMMAND_POST_WRAP_COPY, + BROTLI_STATE_UNCOMPRESSED, + BROTLI_STATE_METADATA, + BROTLI_STATE_COMMAND_INNER_WRITE, + BROTLI_STATE_METABLOCK_DONE, + BROTLI_STATE_COMMAND_POST_WRITE_1, + BROTLI_STATE_COMMAND_POST_WRITE_2, + BROTLI_STATE_BEFORE_COMPRESSED_METABLOCK_HEADER, + BROTLI_STATE_HUFFMAN_CODE_0, + BROTLI_STATE_HUFFMAN_CODE_1, + BROTLI_STATE_HUFFMAN_CODE_2, + BROTLI_STATE_HUFFMAN_CODE_3, + BROTLI_STATE_CONTEXT_MAP_1, + BROTLI_STATE_CONTEXT_MAP_2, + BROTLI_STATE_TREE_GROUP, + BROTLI_STATE_BEFORE_COMPRESSED_METABLOCK_BODY, + BROTLI_STATE_DONE +} BrotliRunningState; + +typedef enum { + BROTLI_STATE_METABLOCK_HEADER_NONE, + BROTLI_STATE_METABLOCK_HEADER_EMPTY, + BROTLI_STATE_METABLOCK_HEADER_NIBBLES, + BROTLI_STATE_METABLOCK_HEADER_SIZE, + BROTLI_STATE_METABLOCK_HEADER_UNCOMPRESSED, + BROTLI_STATE_METABLOCK_HEADER_RESERVED, + BROTLI_STATE_METABLOCK_HEADER_BYTES, + BROTLI_STATE_METABLOCK_HEADER_METADATA +} BrotliRunningMetablockHeaderState; + +typedef enum { + BROTLI_STATE_UNCOMPRESSED_NONE, + BROTLI_STATE_UNCOMPRESSED_WRITE +} BrotliRunningUncompressedState; + +typedef enum { + BROTLI_STATE_TREE_GROUP_NONE, + BROTLI_STATE_TREE_GROUP_LOOP +} BrotliRunningTreeGroupState; + +typedef enum { + BROTLI_STATE_CONTEXT_MAP_NONE, + BROTLI_STATE_CONTEXT_MAP_READ_PREFIX, + BROTLI_STATE_CONTEXT_MAP_HUFFMAN, + BROTLI_STATE_CONTEXT_MAP_DECODE, + BROTLI_STATE_CONTEXT_MAP_TRANSFORM +} BrotliRunningContextMapState; + +typedef enum { + BROTLI_STATE_HUFFMAN_NONE, + BROTLI_STATE_HUFFMAN_SIMPLE_SIZE, + BROTLI_STATE_HUFFMAN_SIMPLE_READ, + BROTLI_STATE_HUFFMAN_SIMPLE_BUILD, + BROTLI_STATE_HUFFMAN_COMPLEX, + BROTLI_STATE_HUFFMAN_LENGTH_SYMBOLS +} BrotliRunningHuffmanState; + +typedef enum { + BROTLI_STATE_DECODE_UINT8_NONE, + BROTLI_STATE_DECODE_UINT8_SHORT, + BROTLI_STATE_DECODE_UINT8_LONG +} BrotliRunningDecodeUint8State; + +typedef enum { + BROTLI_STATE_READ_BLOCK_LENGTH_NONE, + BROTLI_STATE_READ_BLOCK_LENGTH_SUFFIX +} BrotliRunningReadBlockLengthState; + +/* BrotliDecoderState addon, used for Compound Dictionary functionality. */ +typedef struct BrotliDecoderCompoundDictionary { + int num_chunks; + int total_size; + int br_index; + int br_offset; + int br_length; + int br_copied; + const uint8_t* chunks[16]; + int chunk_offsets[16]; + int block_bits; + uint8_t block_map[256]; +} BrotliDecoderCompoundDictionary; + +typedef struct BrotliMetablockHeaderArena { + BrotliRunningTreeGroupState substate_tree_group; + BrotliRunningContextMapState substate_context_map; + BrotliRunningHuffmanState substate_huffman; + + brotli_reg_t sub_loop_counter; + + brotli_reg_t repeat_code_len; + brotli_reg_t prev_code_len; + + /* For ReadHuffmanCode. */ + brotli_reg_t symbol; + brotli_reg_t repeat; + brotli_reg_t space; + + /* Huffman table for "histograms". */ + HuffmanCode table[32]; + /* List of heads of symbol chains. */ + uint16_t* symbol_lists; + /* Storage from symbol_lists. */ + uint16_t symbols_lists_array[BROTLI_HUFFMAN_MAX_CODE_LENGTH + 1 + + BROTLI_NUM_COMMAND_SYMBOLS]; + /* Tails of symbol chains. */ + int next_symbol[32]; + uint8_t code_length_code_lengths[BROTLI_CODE_LENGTH_CODES]; + /* Population counts for the code lengths. */ + uint16_t code_length_histo[16]; + /* TODO(eustas): +2 bytes padding */ + + /* For HuffmanTreeGroupDecode. */ + int htree_index; + HuffmanCode* next; + + /* For DecodeContextMap. */ + brotli_reg_t context_index; + brotli_reg_t max_run_length_prefix; + brotli_reg_t code; + HuffmanCode context_map_table[BROTLI_HUFFMAN_MAX_SIZE_272]; +} BrotliMetablockHeaderArena; + +typedef struct BrotliMetablockBodyArena { + uint8_t dist_extra_bits[544]; + brotli_reg_t dist_offset[544]; +} BrotliMetablockBodyArena; + +struct BrotliDecoderStateStruct { + BrotliRunningState state; + + /* This counter is reused for several disjoint loops. */ + int loop_counter; + + BrotliBitReader br; + + brotli_alloc_func alloc_func; + brotli_free_func free_func; + void* memory_manager_opaque; + + /* Temporary storage for remaining input. Brotli stream format is designed in + a way, that 64 bits are enough to make progress in decoding. */ + union { + uint64_t u64; + uint8_t u8[8]; + } buffer; + brotli_reg_t buffer_length; + + int pos; + int max_backward_distance; + int max_distance; + int ringbuffer_size; + int ringbuffer_mask; + int dist_rb_idx; + int dist_rb[4]; + int error_code; + int meta_block_remaining_len; + + uint8_t* ringbuffer; + uint8_t* ringbuffer_end; + HuffmanCode* htree_command; + const uint8_t* context_lookup; + uint8_t* context_map_slice; + uint8_t* dist_context_map_slice; + + /* This ring buffer holds a few past copy distances that will be used by + some special distance codes. */ + HuffmanTreeGroup literal_hgroup; + HuffmanTreeGroup insert_copy_hgroup; + HuffmanTreeGroup distance_hgroup; + HuffmanCode* block_type_trees; + HuffmanCode* block_len_trees; + /* This is true if the literal context map histogram type always matches the + block type. It is then not needed to keep the context (faster decoding). */ + int trivial_literal_context; + /* Distance context is actual after command is decoded and before distance is + computed. After distance computation it is used as a temporary variable. */ + int distance_context; + brotli_reg_t block_length[3]; + brotli_reg_t block_length_index; + brotli_reg_t num_block_types[3]; + brotli_reg_t block_type_rb[6]; + brotli_reg_t distance_postfix_bits; + brotli_reg_t num_direct_distance_codes; + brotli_reg_t num_dist_htrees; + uint8_t* dist_context_map; + HuffmanCode* literal_htree; + + /* For partial write operations. */ + size_t rb_roundtrips; /* how many times we went around the ring-buffer */ + size_t partial_pos_out; /* how much output to the user in total */ + + /* For InverseMoveToFrontTransform. */ + brotli_reg_t mtf_upper_bound; + uint32_t mtf[64 + 1]; + + int copy_length; + int distance_code; + + uint8_t dist_htree_index; + /* TODO(eustas): +3 bytes padding */ + + /* Less used attributes are at the end of this struct. */ + + brotli_decoder_metadata_start_func metadata_start_func; + brotli_decoder_metadata_chunk_func metadata_chunk_func; + void* metadata_callback_opaque; + + /* For reporting. */ + uint64_t used_input; /* how many bytes of input are consumed */ + + /* States inside function calls. */ + BrotliRunningMetablockHeaderState substate_metablock_header; + BrotliRunningUncompressedState substate_uncompressed; + BrotliRunningDecodeUint8State substate_decode_uint8; + BrotliRunningReadBlockLengthState substate_read_block_length; + + int new_ringbuffer_size; + /* TODO(eustas): +4 bytes padding */ + + unsigned int is_last_metablock : 1; + unsigned int is_uncompressed : 1; + unsigned int is_metadata : 1; + unsigned int should_wrap_ringbuffer : 1; + unsigned int canny_ringbuffer_allocation : 1; + unsigned int large_window : 1; + unsigned int window_bits : 6; + unsigned int size_nibbles : 8; + /* TODO(eustas): +12 bits padding */ + + brotli_reg_t num_literal_htrees; + uint8_t* context_map; + uint8_t* context_modes; + + BrotliSharedDictionary* dictionary; + BrotliDecoderCompoundDictionary* compound_dictionary; + + uint32_t trivial_literal_contexts[8]; /* 256 bits */ + + union { + BrotliMetablockHeaderArena header; + BrotliMetablockBodyArena body; + } arena; +}; + +typedef struct BrotliDecoderStateStruct BrotliDecoderStateInternal; +#define BrotliDecoderState BrotliDecoderStateInternal + +BROTLI_INTERNAL BROTLI_BOOL BrotliDecoderStateInit(BrotliDecoderState* s, + brotli_alloc_func alloc_func, brotli_free_func free_func, void* opaque); +BROTLI_INTERNAL void BrotliDecoderStateCleanup(BrotliDecoderState* s); +BROTLI_INTERNAL void BrotliDecoderStateMetablockBegin(BrotliDecoderState* s); +BROTLI_INTERNAL void BrotliDecoderStateCleanupAfterMetablock( + BrotliDecoderState* s); +BROTLI_INTERNAL BROTLI_BOOL BrotliDecoderHuffmanTreeGroupInit( + BrotliDecoderState* s, HuffmanTreeGroup* group, + brotli_reg_t alphabet_size_max, brotli_reg_t alphabet_size_limit, + brotli_reg_t ntrees); + +#define BROTLI_DECODER_ALLOC(S, L) S->alloc_func(S->memory_manager_opaque, L) + +#define BROTLI_DECODER_FREE(S, X) { \ + S->free_func(S->memory_manager_opaque, X); \ + X = NULL; \ +} + +/* Literal/Command/Distance block size maximum; same as maximum metablock size; + used as block size when there is no block switching. */ +#define BROTLI_BLOCK_SIZE_CAP (1U << 24) + +#if defined(__cplusplus) || defined(c_plusplus) +} /* extern "C" */ +#endif + +#endif /* BROTLI_DEC_STATE_H_ */ diff --git a/Sources/CBrotliDec/dec/static_init.c b/Sources/CBrotliDec/dec/static_init.c new file mode 100644 index 0000000..1345052 --- /dev/null +++ b/Sources/CBrotliDec/dec/static_init.c @@ -0,0 +1,53 @@ +/* Copyright 2025 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +#include "static_init.h" + +#include "../common/platform.h" +#include "../common/static_init.h" + +#if (BROTLI_STATIC_INIT != BROTLI_STATIC_INIT_NONE) +#include "../common/dictionary.h" +#include "prefix.h" +#endif + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +#if (BROTLI_STATIC_INIT != BROTLI_STATIC_INIT_NONE) +static BROTLI_BOOL DoBrotliDecoderStaticInit(void) { + BROTLI_BOOL ok = BrotliDecoderInitCmdLut(kCmdLut); + if (!ok) return BROTLI_FALSE; + return BROTLI_TRUE; +} +#endif /* BROTLI_STATIC_INIT_NONE */ + +#if (BROTLI_STATIC_INIT == BROTLI_STATIC_INIT_EARLY) +static BROTLI_BOOL kEarlyInitOk; +static __attribute__((constructor)) void BrotliDecoderStaticInitEarly(void) { + kEarlyInitOk = DoBrotliDecoderStaticInit(); +} +#elif (BROTLI_STATIC_INIT == BROTLI_STATIC_INIT_LAZY) +static BROTLI_BOOL kLazyInitOk; +void BrotliDecoderLazyStaticInitInner(void) { + kLazyInitOk = DoBrotliDecoderStaticInit(); +} +#endif /* BROTLI_STATIC_INIT_EARLY */ + +BROTLI_BOOL BrotliDecoderEnsureStaticInit(void) { +#if (BROTLI_STATIC_INIT == BROTLI_STATIC_INIT_NONE) + return BROTLI_TRUE; +#elif (BROTLI_STATIC_INIT == BROTLI_STATIC_INIT_EARLY) + return kEarlyInitOk; +#else + return kLazyInitOk; +#endif +} + +#if defined(__cplusplus) || defined(c_plusplus) +} /* extern "C" */ +#endif diff --git a/Sources/CBrotliDec/dec/static_init.h b/Sources/CBrotliDec/dec/static_init.h new file mode 100644 index 0000000..4ae063e --- /dev/null +++ b/Sources/CBrotliDec/dec/static_init.h @@ -0,0 +1,30 @@ +/* Copyright 2025 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +/* Central point for static initialization. */ + +#ifndef THIRD_PARTY_BROTLI_DEC_STATIC_INIT_H_ +#define THIRD_PARTY_BROTLI_DEC_STATIC_INIT_H_ + +#include "../common/platform.h" +#include "../common/static_init.h" + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +#if (BROTLI_STATIC_INIT == BROTLI_STATIC_INIT_LAZY) +BROTLI_INTERNAL void BrotliDecoderLazyStaticInitInner(void); +BROTLI_INTERNAL void BrotliDecoderLazyStaticInit(void); +#endif /* BROTLI_STATIC_INIT */ + +BROTLI_INTERNAL BROTLI_BOOL BrotliDecoderEnsureStaticInit(void); + +#if defined(__cplusplus) || defined(c_plusplus) +} /* extern "C" */ +#endif + +#endif // THIRD_PARTY_BROTLI_DEC_STATIC_INIT_H_ diff --git a/Sources/CBrotliDec/include/brotli/decode.h b/Sources/CBrotliDec/include/brotli/decode.h new file mode 100644 index 0000000..8d436db --- /dev/null +++ b/Sources/CBrotliDec/include/brotli/decode.h @@ -0,0 +1,409 @@ +/* Copyright 2013 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +/** + * @file + * API for Brotli decompression. + */ + +#ifndef BROTLI_DEC_DECODE_H_ +#define BROTLI_DEC_DECODE_H_ + +#include +#include +#include /* IWYU pragma: export */ + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +/** + * Opaque structure that holds decoder state. + * + * Allocated and initialized with ::BrotliDecoderCreateInstance. + * Cleaned up and deallocated with ::BrotliDecoderDestroyInstance. + */ +typedef struct BrotliDecoderStateStruct BrotliDecoderState; + +/** + * Result type for ::BrotliDecoderDecompress and + * ::BrotliDecoderDecompressStream functions. + */ +typedef enum { + /** Decoding error, e.g. corrupted input or memory allocation problem. */ + BROTLI_DECODER_RESULT_ERROR = 0, + /** Decoding successfully completed. */ + BROTLI_DECODER_RESULT_SUCCESS = 1, + /** Partially done; should be called again with more input. */ + BROTLI_DECODER_RESULT_NEEDS_MORE_INPUT = 2, + /** Partially done; should be called again with more output. */ + BROTLI_DECODER_RESULT_NEEDS_MORE_OUTPUT = 3 +} BrotliDecoderResult; + +/** + * Template that evaluates items of ::BrotliDecoderErrorCode. + * + * Example: @code {.cpp} + * // Log Brotli error code. + * switch (brotliDecoderErrorCode) { + * #define CASE_(PREFIX, NAME, CODE) \ + * case BROTLI_DECODER ## PREFIX ## NAME: \ + * LOG(INFO) << "error code:" << #NAME; \ + * break; + * #define NEWLINE_ + * BROTLI_DECODER_ERROR_CODES_LIST(CASE_, NEWLINE_) + * #undef CASE_ + * #undef NEWLINE_ + * default: LOG(FATAL) << "unknown brotli error code"; + * } + * @endcode + */ +#define BROTLI_DECODER_ERROR_CODES_LIST(BROTLI_ERROR_CODE, SEPARATOR) \ + BROTLI_ERROR_CODE(_, NO_ERROR, 0) SEPARATOR \ + /* Same as BrotliDecoderResult values */ \ + BROTLI_ERROR_CODE(_, SUCCESS, 1) SEPARATOR \ + BROTLI_ERROR_CODE(_, NEEDS_MORE_INPUT, 2) SEPARATOR \ + BROTLI_ERROR_CODE(_, NEEDS_MORE_OUTPUT, 3) SEPARATOR \ + \ + /* Errors caused by invalid input */ \ + BROTLI_ERROR_CODE(_ERROR_FORMAT_, EXUBERANT_NIBBLE, -1) SEPARATOR \ + BROTLI_ERROR_CODE(_ERROR_FORMAT_, RESERVED, -2) SEPARATOR \ + BROTLI_ERROR_CODE(_ERROR_FORMAT_, EXUBERANT_META_NIBBLE, -3) SEPARATOR \ + BROTLI_ERROR_CODE(_ERROR_FORMAT_, SIMPLE_HUFFMAN_ALPHABET, -4) SEPARATOR \ + BROTLI_ERROR_CODE(_ERROR_FORMAT_, SIMPLE_HUFFMAN_SAME, -5) SEPARATOR \ + BROTLI_ERROR_CODE(_ERROR_FORMAT_, CL_SPACE, -6) SEPARATOR \ + BROTLI_ERROR_CODE(_ERROR_FORMAT_, HUFFMAN_SPACE, -7) SEPARATOR \ + BROTLI_ERROR_CODE(_ERROR_FORMAT_, CONTEXT_MAP_REPEAT, -8) SEPARATOR \ + BROTLI_ERROR_CODE(_ERROR_FORMAT_, BLOCK_LENGTH_1, -9) SEPARATOR \ + BROTLI_ERROR_CODE(_ERROR_FORMAT_, BLOCK_LENGTH_2, -10) SEPARATOR \ + BROTLI_ERROR_CODE(_ERROR_FORMAT_, TRANSFORM, -11) SEPARATOR \ + BROTLI_ERROR_CODE(_ERROR_FORMAT_, DICTIONARY, -12) SEPARATOR \ + BROTLI_ERROR_CODE(_ERROR_FORMAT_, WINDOW_BITS, -13) SEPARATOR \ + BROTLI_ERROR_CODE(_ERROR_FORMAT_, PADDING_1, -14) SEPARATOR \ + BROTLI_ERROR_CODE(_ERROR_FORMAT_, PADDING_2, -15) SEPARATOR \ + BROTLI_ERROR_CODE(_ERROR_FORMAT_, DISTANCE, -16) SEPARATOR \ + \ + /* -17 code is reserved */ \ + \ + BROTLI_ERROR_CODE(_ERROR_, COMPOUND_DICTIONARY, -18) SEPARATOR \ + BROTLI_ERROR_CODE(_ERROR_, DICTIONARY_NOT_SET, -19) SEPARATOR \ + BROTLI_ERROR_CODE(_ERROR_, INVALID_ARGUMENTS, -20) SEPARATOR \ + \ + /* Memory allocation problems */ \ + BROTLI_ERROR_CODE(_ERROR_ALLOC_, CONTEXT_MODES, -21) SEPARATOR \ + /* Literal, insert and distance trees together */ \ + BROTLI_ERROR_CODE(_ERROR_ALLOC_, TREE_GROUPS, -22) SEPARATOR \ + /* -23..-24 codes are reserved for distinct tree groups */ \ + BROTLI_ERROR_CODE(_ERROR_ALLOC_, CONTEXT_MAP, -25) SEPARATOR \ + BROTLI_ERROR_CODE(_ERROR_ALLOC_, RING_BUFFER_1, -26) SEPARATOR \ + BROTLI_ERROR_CODE(_ERROR_ALLOC_, RING_BUFFER_2, -27) SEPARATOR \ + /* -28..-29 codes are reserved for dynamic ring-buffer allocation */ \ + BROTLI_ERROR_CODE(_ERROR_ALLOC_, BLOCK_TYPE_TREES, -30) SEPARATOR \ + \ + /* "Impossible" states */ \ + BROTLI_ERROR_CODE(_ERROR_, UNREACHABLE, -31) + +/** + * Error code for detailed logging / production debugging. + * + * See ::BrotliDecoderGetErrorCode and ::BROTLI_LAST_ERROR_CODE. + */ +typedef enum { +#define BROTLI_COMMA_ , +#define BROTLI_ERROR_CODE_ENUM_ITEM_(PREFIX, NAME, CODE) \ + BROTLI_DECODER ## PREFIX ## NAME = CODE + BROTLI_DECODER_ERROR_CODES_LIST(BROTLI_ERROR_CODE_ENUM_ITEM_, BROTLI_COMMA_) +} BrotliDecoderErrorCode; +#undef BROTLI_ERROR_CODE_ENUM_ITEM_ +#undef BROTLI_COMMA_ + +/** + * The value of the last error code, negative integer. + * + * All other error code values are in the range from ::BROTLI_LAST_ERROR_CODE + * to @c -1. There are also 4 other possible non-error codes @c 0 .. @c 3 in + * ::BrotliDecoderErrorCode enumeration. + */ +#define BROTLI_LAST_ERROR_CODE BROTLI_DECODER_ERROR_UNREACHABLE + +/** Options to be used with ::BrotliDecoderSetParameter. */ +typedef enum BrotliDecoderParameter { + /** + * Disable "canny" ring buffer allocation strategy. + * + * Ring buffer is allocated according to window size, despite the real size of + * the content. + */ + BROTLI_DECODER_PARAM_DISABLE_RING_BUFFER_REALLOCATION = 0, + /** + * Flag that determines if "Large Window Brotli" is used. + */ + BROTLI_DECODER_PARAM_LARGE_WINDOW = 1 +} BrotliDecoderParameter; + +/** + * Sets the specified parameter to the given decoder instance. + * + * @param state decoder instance + * @param param parameter to set + * @param value new parameter value + * @returns ::BROTLI_FALSE if parameter is unrecognized, or value is invalid + * @returns ::BROTLI_TRUE if value is accepted + */ +BROTLI_DEC_API BROTLI_BOOL BrotliDecoderSetParameter( + BrotliDecoderState* state, BrotliDecoderParameter param, uint32_t value); + +/** + * Adds LZ77 prefix dictionary, adds or replaces built-in static dictionary and + * transforms. + * + * Attached dictionary ownership is not transferred. + * Data provided to this method should be kept accessible until + * decoding is finished and decoder instance is destroyed. + * + * @note Dictionaries can NOT be attached after actual decoding is started. + * + * @param state decoder instance + * @param type dictionary data format + * @param data_size length of memory region pointed by @p data + * @param data dictionary data in format corresponding to @p type + * @returns ::BROTLI_FALSE if dictionary is corrupted, + * or dictionary count limit is reached + * @returns ::BROTLI_TRUE if dictionary is accepted / attached + */ +BROTLI_DEC_API BROTLI_BOOL BrotliDecoderAttachDictionary( + BrotliDecoderState* state, BrotliSharedDictionaryType type, + size_t data_size, const uint8_t data[BROTLI_ARRAY_PARAM(data_size)]); + +/** + * Creates an instance of ::BrotliDecoderState and initializes it. + * + * The instance can be used once for decoding and should then be destroyed with + * ::BrotliDecoderDestroyInstance, it cannot be reused for a new decoding + * session. + * + * @p alloc_func and @p free_func @b MUST be both zero or both non-zero. In the + * case they are both zero, default memory allocators are used. @p opaque is + * passed to @p alloc_func and @p free_func when they are called. @p free_func + * has to return without doing anything when asked to free a NULL pointer. + * + * @param alloc_func custom memory allocation function + * @param free_func custom memory free function + * @param opaque custom memory manager handle + * @returns @c 0 if instance can not be allocated or initialized + * @returns pointer to initialized ::BrotliDecoderState otherwise + */ +BROTLI_DEC_API BrotliDecoderState* BrotliDecoderCreateInstance( + brotli_alloc_func alloc_func, brotli_free_func free_func, void* opaque); + +/** + * Deinitializes and frees ::BrotliDecoderState instance. + * + * @param state decoder instance to be cleaned up and deallocated + */ +BROTLI_DEC_API void BrotliDecoderDestroyInstance(BrotliDecoderState* state); + +/** + * Performs one-shot memory-to-memory decompression. + * + * Decompresses the data in @p encoded_buffer into @p decoded_buffer, and sets + * @p *decoded_size to the decompressed length. + * + * @param encoded_size size of @p encoded_buffer + * @param encoded_buffer compressed data buffer with at least @p encoded_size + * addressable bytes + * @param[in, out] decoded_size @b in: size of @p decoded_buffer; \n + * @b out: length of decompressed data written to + * @p decoded_buffer + * @param decoded_buffer decompressed data destination buffer + * @returns ::BROTLI_DECODER_RESULT_ERROR if input is corrupted, memory + * allocation failed, or @p decoded_buffer is not large enough; + * @returns ::BROTLI_DECODER_RESULT_SUCCESS otherwise + */ +BROTLI_DEC_API BrotliDecoderResult BrotliDecoderDecompress( + size_t encoded_size, + const uint8_t encoded_buffer[BROTLI_ARRAY_PARAM(encoded_size)], + size_t* decoded_size, + uint8_t decoded_buffer[BROTLI_ARRAY_PARAM(*decoded_size)]); + +/** + * Decompresses the input stream to the output stream. + * + * The values @p *available_in and @p *available_out must specify the number of + * bytes addressable at @p *next_in and @p *next_out respectively. + * When @p *available_out is @c 0, @p next_out is allowed to be @c NULL. + * + * After each call, @p *available_in will be decremented by the amount of input + * bytes consumed, and the @p *next_in pointer will be incremented by that + * amount. Similarly, @p *available_out will be decremented by the amount of + * output bytes written, and the @p *next_out pointer will be incremented by + * that amount. + * + * @p total_out, if it is not a null-pointer, will be set to the number + * of bytes decompressed since the last @p state initialization. + * + * @note Input is never overconsumed, so @p next_in and @p available_in could be + * passed to the next consumer after decoding is complete. + * + * @param state decoder instance + * @param[in, out] available_in @b in: amount of available input; \n + * @b out: amount of unused input + * @param[in, out] next_in pointer to the next compressed byte + * @param[in, out] available_out @b in: length of output buffer; \n + * @b out: remaining size of output buffer + * @param[in, out] next_out output buffer cursor; + * can be @c NULL if @p available_out is @c 0 + * @param[out] total_out number of bytes decompressed so far; can be @c NULL + * @returns ::BROTLI_DECODER_RESULT_ERROR if input is corrupted, memory + * allocation failed, arguments were invalid, etc.; + * use ::BrotliDecoderGetErrorCode to get detailed error code + * @returns ::BROTLI_DECODER_RESULT_NEEDS_MORE_INPUT decoding is blocked until + * more input data is provided + * @returns ::BROTLI_DECODER_RESULT_NEEDS_MORE_OUTPUT decoding is blocked until + * more output space is provided + * @returns ::BROTLI_DECODER_RESULT_SUCCESS decoding is finished, no more + * input might be consumed and no more output will be produced + */ +BROTLI_DEC_API BrotliDecoderResult BrotliDecoderDecompressStream( + BrotliDecoderState* state, size_t* available_in, const uint8_t** next_in, + size_t* available_out, uint8_t** next_out, size_t* total_out); + +/** + * Checks if decoder has more output. + * + * @param state decoder instance + * @returns ::BROTLI_TRUE, if decoder has some unconsumed output + * @returns ::BROTLI_FALSE otherwise + */ +BROTLI_DEC_API BROTLI_BOOL BrotliDecoderHasMoreOutput( + const BrotliDecoderState* state); + +/** + * Acquires pointer to internal output buffer. + * + * This method is used to make language bindings easier and more efficient: + * -# push data to ::BrotliDecoderDecompressStream, + * until ::BROTLI_DECODER_RESULT_NEEDS_MORE_OUTPUT is reported + * -# use ::BrotliDecoderTakeOutput to peek bytes and copy to language-specific + * entity + * + * Also this could be useful if there is an output stream that is able to + * consume all the provided data (e.g. when data is saved to file system). + * + * @attention After every call to ::BrotliDecoderTakeOutput @p *size bytes of + * output are considered consumed for all consecutive calls to the + * instance methods; returned pointer becomes invalidated as well. + * + * @note Decoder output is not guaranteed to be contiguous. This means that + * after the size-unrestricted call to ::BrotliDecoderTakeOutput, + * immediate next call to ::BrotliDecoderTakeOutput may return more data. + * + * @param state decoder instance + * @param[in, out] size @b in: number of bytes caller is ready to take, @c 0 if + * any amount could be handled; \n + * @b out: amount of data pointed by returned pointer and + * considered consumed; \n + * out value is never greater than in value, unless it is @c 0 + * @returns pointer to output data + */ +BROTLI_DEC_API const uint8_t* BrotliDecoderTakeOutput( + BrotliDecoderState* state, size_t* size); + +/** + * Checks if instance has already consumed input. + * + * Instance that returns ::BROTLI_FALSE is considered "fresh" and could be + * reused. + * + * @param state decoder instance + * @returns ::BROTLI_TRUE if decoder has already used some input bytes + * @returns ::BROTLI_FALSE otherwise + */ +BROTLI_DEC_API BROTLI_BOOL BrotliDecoderIsUsed(const BrotliDecoderState* state); + +/** + * Checks if decoder instance reached the final state. + * + * @param state decoder instance + * @returns ::BROTLI_TRUE if decoder is in a state where it reached the end of + * the input and produced all of the output + * @returns ::BROTLI_FALSE otherwise + */ +BROTLI_DEC_API BROTLI_BOOL BrotliDecoderIsFinished( + const BrotliDecoderState* state); + +/** + * Acquires a detailed error code. + * + * Should be used only after ::BrotliDecoderDecompressStream returns + * ::BROTLI_DECODER_RESULT_ERROR. + * + * See also ::BrotliDecoderErrorString + * + * @param state decoder instance + * @returns last saved error code + */ +BROTLI_DEC_API BrotliDecoderErrorCode BrotliDecoderGetErrorCode( + const BrotliDecoderState* state); + +/** + * Converts error code to a c-string. + */ +BROTLI_DEC_API const char* BrotliDecoderErrorString(BrotliDecoderErrorCode c); + +/** + * Gets a decoder library version. + * + * Look at BROTLI_MAKE_HEX_VERSION for more information. + */ +BROTLI_DEC_API uint32_t BrotliDecoderVersion(void); + +/** + * Callback to fire on metadata block start. + * + * After this callback is fired, if @p size is not @c 0, it is followed by + * ::brotli_decoder_metadata_chunk_func as more metadata block contents become + * accessible. + * + * @param opaque callback handle + * @param size size of metadata block + */ +typedef void (*brotli_decoder_metadata_start_func)(void* opaque, size_t size); + +/** + * Callback to fire on metadata block chunk becomes available. + * + * This function can be invoked multiple times per metadata block; block should + * be considered finished when sum of @p size matches the announced metadata + * block size. Chunks contents pointed by @p data are transient and shouln not + * be accessed after leaving the callback. + * + * @param opaque callback handle + * @param data pointer to metadata contents + * @param size size of metadata block chunk, at least @c 1 + */ +typedef void (*brotli_decoder_metadata_chunk_func)(void* opaque, + const uint8_t* data, + size_t size); + +/** + * Sets callback for receiving metadata blocks. + * + * @param state decoder instance + * @param start_func callback on metadata block start + * @param chunk_func callback on metadata block chunk + * @param opaque callback handle + */ +BROTLI_DEC_API void BrotliDecoderSetMetadataCallbacks( + BrotliDecoderState* state, + brotli_decoder_metadata_start_func start_func, + brotli_decoder_metadata_chunk_func chunk_func, void* opaque); + +#if defined(__cplusplus) || defined(c_plusplus) +} /* extern "C" */ +#endif + +#endif /* BROTLI_DEC_DECODE_H_ */ diff --git a/Sources/CBrotliDec/include/brotli/port.h b/Sources/CBrotliDec/include/brotli/port.h new file mode 100644 index 0000000..11cefd7 --- /dev/null +++ b/Sources/CBrotliDec/include/brotli/port.h @@ -0,0 +1,302 @@ +/* Copyright 2016 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +/* Macros for compiler / platform specific API declarations. */ + +#ifndef BROTLI_COMMON_PORT_H_ +#define BROTLI_COMMON_PORT_H_ + +/* The following macros were borrowed from https://github.com/nemequ/hedley + * with permission of original author - Evan Nemerson */ + +/* >>> >>> >>> hedley macros */ + +#define BROTLI_MAKE_VERSION(major, minor, revision) \ + (((major) * 1000000) + ((minor) * 1000) + (revision)) + +#if defined(__GNUC__) && defined(__GNUC_PATCHLEVEL__) +#define BROTLI_GNUC_VERSION \ + BROTLI_MAKE_VERSION(__GNUC__, __GNUC_MINOR__, __GNUC_PATCHLEVEL__) +#elif defined(__GNUC__) +#define BROTLI_GNUC_VERSION BROTLI_MAKE_VERSION(__GNUC__, __GNUC_MINOR__, 0) +#endif + +#if defined(BROTLI_GNUC_VERSION) +#define BROTLI_GNUC_VERSION_CHECK(major, minor, patch) \ + (BROTLI_GNUC_VERSION >= BROTLI_MAKE_VERSION(major, minor, patch)) +#else +#define BROTLI_GNUC_VERSION_CHECK(major, minor, patch) (0) +#endif + +#if defined(_MSC_FULL_VER) && (_MSC_FULL_VER >= 140000000) +#define BROTLI_MSVC_VERSION \ + BROTLI_MAKE_VERSION((_MSC_FULL_VER / 10000000), \ + (_MSC_FULL_VER % 10000000) / 100000, \ + (_MSC_FULL_VER % 100000) / 100) +#elif defined(_MSC_FULL_VER) +#define BROTLI_MSVC_VERSION \ + BROTLI_MAKE_VERSION((_MSC_FULL_VER / 1000000), \ + (_MSC_FULL_VER % 1000000) / 10000, \ + (_MSC_FULL_VER % 10000) / 10) +#elif defined(_MSC_VER) +#define BROTLI_MSVC_VERSION \ + BROTLI_MAKE_VERSION(_MSC_VER / 100, _MSC_VER % 100, 0) +#endif + +#if !defined(_MSC_VER) +#define BROTLI_MSVC_VERSION_CHECK(major, minor, patch) (0) +#elif defined(_MSC_VER) && (_MSC_VER >= 1400) +#define BROTLI_MSVC_VERSION_CHECK(major, minor, patch) \ + (_MSC_FULL_VER >= ((major * 10000000) + (minor * 100000) + (patch))) +#elif defined(_MSC_VER) && (_MSC_VER >= 1200) +#define BROTLI_MSVC_VERSION_CHECK(major, minor, patch) \ + (_MSC_FULL_VER >= ((major * 1000000) + (minor * 10000) + (patch))) +#else +#define BROTLI_MSVC_VERSION_CHECK(major, minor, patch) \ + (_MSC_VER >= ((major * 100) + (minor))) +#endif + +#if defined(__INTEL_COMPILER) && defined(__INTEL_COMPILER_UPDATE) +#define BROTLI_INTEL_VERSION \ + BROTLI_MAKE_VERSION(__INTEL_COMPILER / 100, \ + __INTEL_COMPILER % 100, \ + __INTEL_COMPILER_UPDATE) +#elif defined(__INTEL_COMPILER) +#define BROTLI_INTEL_VERSION \ + BROTLI_MAKE_VERSION(__INTEL_COMPILER / 100, __INTEL_COMPILER % 100, 0) +#endif + +#if defined(BROTLI_INTEL_VERSION) +#define BROTLI_INTEL_VERSION_CHECK(major, minor, patch) \ + (BROTLI_INTEL_VERSION >= BROTLI_MAKE_VERSION(major, minor, patch)) +#else +#define BROTLI_INTEL_VERSION_CHECK(major, minor, patch) (0) +#endif + +#if defined(__PGI) && \ + defined(__PGIC__) && defined(__PGIC_MINOR__) && defined(__PGIC_PATCHLEVEL__) +#define BROTLI_PGI_VERSION \ + BROTLI_MAKE_VERSION(__PGIC__, __PGIC_MINOR__, __PGIC_PATCHLEVEL__) +#endif + +#if defined(BROTLI_PGI_VERSION) +#define BROTLI_PGI_VERSION_CHECK(major, minor, patch) \ + (BROTLI_PGI_VERSION >= BROTLI_MAKE_VERSION(major, minor, patch)) +#else +#define BROTLI_PGI_VERSION_CHECK(major, minor, patch) (0) +#endif + +#if defined(__SUNPRO_C) && (__SUNPRO_C > 0x1000) +#define BROTLI_SUNPRO_VERSION \ + BROTLI_MAKE_VERSION( \ + (((__SUNPRO_C >> 16) & 0xf) * 10) + ((__SUNPRO_C >> 12) & 0xf), \ + (((__SUNPRO_C >> 8) & 0xf) * 10) + ((__SUNPRO_C >> 4) & 0xf), \ + (__SUNPRO_C & 0xf) * 10) +#elif defined(__SUNPRO_C) +#define BROTLI_SUNPRO_VERSION \ + BROTLI_MAKE_VERSION((__SUNPRO_C >> 8) & 0xf, \ + (__SUNPRO_C >> 4) & 0xf, \ + (__SUNPRO_C) & 0xf) +#elif defined(__SUNPRO_CC) && (__SUNPRO_CC > 0x1000) +#define BROTLI_SUNPRO_VERSION \ + BROTLI_MAKE_VERSION( \ + (((__SUNPRO_CC >> 16) & 0xf) * 10) + ((__SUNPRO_CC >> 12) & 0xf), \ + (((__SUNPRO_CC >> 8) & 0xf) * 10) + ((__SUNPRO_CC >> 4) & 0xf), \ + (__SUNPRO_CC & 0xf) * 10) +#elif defined(__SUNPRO_CC) +#define BROTLI_SUNPRO_VERSION \ + BROTLI_MAKE_VERSION((__SUNPRO_CC >> 8) & 0xf, \ + (__SUNPRO_CC >> 4) & 0xf, \ + (__SUNPRO_CC) & 0xf) +#endif + +#if defined(BROTLI_SUNPRO_VERSION) +#define BROTLI_SUNPRO_VERSION_CHECK(major, minor, patch) \ + (BROTLI_SUNPRO_VERSION >= BROTLI_MAKE_VERSION(major, minor, patch)) +#else +#define BROTLI_SUNPRO_VERSION_CHECK(major, minor, patch) (0) +#endif + +#if defined(__CC_ARM) && defined(__ARMCOMPILER_VERSION) +#define BROTLI_ARM_VERSION \ + BROTLI_MAKE_VERSION((__ARMCOMPILER_VERSION / 1000000), \ + (__ARMCOMPILER_VERSION % 1000000) / 10000, \ + (__ARMCOMPILER_VERSION % 10000) / 100) +#elif defined(__CC_ARM) && defined(__ARMCC_VERSION) +#define BROTLI_ARM_VERSION \ + BROTLI_MAKE_VERSION((__ARMCC_VERSION / 1000000), \ + (__ARMCC_VERSION % 1000000) / 10000, \ + (__ARMCC_VERSION % 10000) / 100) +#endif + +#if defined(BROTLI_ARM_VERSION) +#define BROTLI_ARM_VERSION_CHECK(major, minor, patch) \ + (BROTLI_ARM_VERSION >= BROTLI_MAKE_VERSION(major, minor, patch)) +#else +#define BROTLI_ARM_VERSION_CHECK(major, minor, patch) (0) +#endif + +#if defined(__ibmxl__) +#define BROTLI_IBM_VERSION \ + BROTLI_MAKE_VERSION(__ibmxl_version__, \ + __ibmxl_release__, \ + __ibmxl_modification__) +#elif defined(__xlC__) && defined(__xlC_ver__) +#define BROTLI_IBM_VERSION \ + BROTLI_MAKE_VERSION(__xlC__ >> 8, __xlC__ & 0xff, (__xlC_ver__ >> 8) & 0xff) +#elif defined(__xlC__) +#define BROTLI_IBM_VERSION BROTLI_MAKE_VERSION(__xlC__ >> 8, __xlC__ & 0xff, 0) +#endif + +#if defined(BROTLI_IBM_VERSION) +#define BROTLI_IBM_VERSION_CHECK(major, minor, patch) \ + (BROTLI_IBM_VERSION >= BROTLI_MAKE_VERSION(major, minor, patch)) +#else +#define BROTLI_IBM_VERSION_CHECK(major, minor, patch) (0) +#endif + +#if defined(__TI_COMPILER_VERSION__) +#define BROTLI_TI_VERSION \ + BROTLI_MAKE_VERSION((__TI_COMPILER_VERSION__ / 1000000), \ + (__TI_COMPILER_VERSION__ % 1000000) / 1000, \ + (__TI_COMPILER_VERSION__ % 1000)) +#endif + +#if defined(BROTLI_TI_VERSION) +#define BROTLI_TI_VERSION_CHECK(major, minor, patch) \ + (BROTLI_TI_VERSION >= BROTLI_MAKE_VERSION(major, minor, patch)) +#else +#define BROTLI_TI_VERSION_CHECK(major, minor, patch) (0) +#endif + +#if defined(__IAR_SYSTEMS_ICC__) +#if __VER__ > 1000 +#define BROTLI_IAR_VERSION \ + BROTLI_MAKE_VERSION((__VER__ / 1000000), \ + (__VER__ / 1000) % 1000, \ + (__VER__ % 1000)) +#else +#define BROTLI_IAR_VERSION BROTLI_MAKE_VERSION(VER / 100, __VER__ % 100, 0) +#endif +#endif + +#if defined(BROTLI_IAR_VERSION) +#define BROTLI_IAR_VERSION_CHECK(major, minor, patch) \ + (BROTLI_IAR_VERSION >= BROTLI_MAKE_VERSION(major, minor, patch)) +#else +#define BROTLI_IAR_VERSION_CHECK(major, minor, patch) (0) +#endif + +#if defined(__TINYC__) +#define BROTLI_TINYC_VERSION \ + BROTLI_MAKE_VERSION(__TINYC__ / 1000, (__TINYC__ / 100) % 10, __TINYC__ % 100) +#endif + +#if defined(BROTLI_TINYC_VERSION) +#define BROTLI_TINYC_VERSION_CHECK(major, minor, patch) \ + (BROTLI_TINYC_VERSION >= BROTLI_MAKE_VERSION(major, minor, patch)) +#else +#define BROTLI_TINYC_VERSION_CHECK(major, minor, patch) (0) +#endif + +#if defined(__has_attribute) +#define BROTLI_GNUC_HAS_ATTRIBUTE(attribute, major, minor, patch) \ + __has_attribute(attribute) +#else +#define BROTLI_GNUC_HAS_ATTRIBUTE(attribute, major, minor, patch) \ + BROTLI_GNUC_VERSION_CHECK(major, minor, patch) +#endif + +#if defined(__has_builtin) +#define BROTLI_GNUC_HAS_BUILTIN(builtin, major, minor, patch) \ + __has_builtin(builtin) +#else +#define BROTLI_GNUC_HAS_BUILTIN(builtin, major, minor, patch) \ + BROTLI_GNUC_VERSION_CHECK(major, minor, patch) +#endif + +#if defined(__has_feature) +#define BROTLI_HAS_FEATURE(feature) __has_feature(feature) +#else +#define BROTLI_HAS_FEATURE(feature) (0) +#endif + +#if defined(_WIN32) || defined(__CYGWIN__) +#define BROTLI_PUBLIC +#elif BROTLI_GNUC_VERSION_CHECK(3, 3, 0) || \ + BROTLI_TI_VERSION_CHECK(8, 0, 0) || \ + BROTLI_INTEL_VERSION_CHECK(16, 0, 0) || \ + BROTLI_ARM_VERSION_CHECK(4, 1, 0) || \ + BROTLI_IBM_VERSION_CHECK(13, 1, 0) || \ + BROTLI_SUNPRO_VERSION_CHECK(5, 11, 0) || \ + (BROTLI_TI_VERSION_CHECK(7, 3, 0) && \ + defined(__TI_GNU_ATTRIBUTE_SUPPORT__) && defined(__TI_EABI__)) +#define BROTLI_PUBLIC __attribute__ ((visibility ("default"))) +#else +#define BROTLI_PUBLIC +#endif + +#if defined(_WIN32) || defined(__CYGWIN__) +#define BROTLI_INTERNAL +#elif BROTLI_GNUC_VERSION_CHECK(3, 3, 0) || \ + BROTLI_TI_VERSION_CHECK(8, 0, 0) || \ + BROTLI_INTEL_VERSION_CHECK(16, 0, 0) || \ + BROTLI_ARM_VERSION_CHECK(4, 1, 0) || \ + BROTLI_IBM_VERSION_CHECK(13, 1, 0) || \ + BROTLI_SUNPRO_VERSION_CHECK(5, 11, 0) || \ + (BROTLI_TI_VERSION_CHECK(7, 3, 0) && \ + defined(__TI_GNU_ATTRIBUTE_SUPPORT__) && defined(__TI_EABI__)) +#define BROTLI_INTERNAL __attribute__ ((visibility ("hidden"))) +#else +#define BROTLI_INTERNAL +#endif + +#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) && \ + !defined(__STDC_NO_VLA__) && !defined(__cplusplus) && \ + !defined(__PGI) && !defined(__PGIC__) && !defined(__TINYC__) && \ + !defined(__clang__) +#define BROTLI_ARRAY_PARAM(name) (name) +#else +#define BROTLI_ARRAY_PARAM(name) +#endif + +/* <<< <<< <<< end of hedley macros. */ + +#if defined(BROTLI_SHARED_COMPILATION) +#if defined(_WIN32) +#if defined(BROTLICOMMON_SHARED_COMPILATION) +#define BROTLI_COMMON_API __declspec(dllexport) +#else /* !BROTLICOMMON_SHARED_COMPILATION */ +#define BROTLI_COMMON_API __declspec(dllimport) +#endif /* BROTLICOMMON_SHARED_COMPILATION */ +#if defined(BROTLIDEC_SHARED_COMPILATION) +#define BROTLI_DEC_API __declspec(dllexport) +#else /* !BROTLIDEC_SHARED_COMPILATION */ +#define BROTLI_DEC_API __declspec(dllimport) +#endif /* BROTLIDEC_SHARED_COMPILATION */ +#if defined(BROTLIENC_SHARED_COMPILATION) +#define BROTLI_ENC_API __declspec(dllexport) +#else /* !BROTLIENC_SHARED_COMPILATION */ +#define BROTLI_ENC_API __declspec(dllimport) +#endif /* BROTLIENC_SHARED_COMPILATION */ +#else /* !_WIN32 */ +#define BROTLI_COMMON_API BROTLI_PUBLIC +#define BROTLI_DEC_API BROTLI_PUBLIC +#define BROTLI_ENC_API BROTLI_PUBLIC +#endif /* _WIN32 */ +#else /* BROTLI_SHARED_COMPILATION */ +#define BROTLI_COMMON_API +#define BROTLI_DEC_API +#define BROTLI_ENC_API +#endif + +#if defined(BROTLI_BUILD_ENC_EXTRA_API) +#define BROTLI_ENC_EXTRA_API BROTLI_ENC_API +#else +#define BROTLI_ENC_EXTRA_API BROTLI_INTERNAL +#endif + +#endif /* BROTLI_COMMON_PORT_H_ */ diff --git a/Sources/CBrotliDec/include/brotli/shared_dictionary.h b/Sources/CBrotliDec/include/brotli/shared_dictionary.h new file mode 100644 index 0000000..2970c2d --- /dev/null +++ b/Sources/CBrotliDec/include/brotli/shared_dictionary.h @@ -0,0 +1,100 @@ +/* Copyright 2017 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +/* (Opaque) Shared Dictionary definition and utilities. */ + +#ifndef BROTLI_COMMON_SHARED_DICTIONARY_H_ +#define BROTLI_COMMON_SHARED_DICTIONARY_H_ + +#include +#include + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +#define SHARED_BROTLI_MIN_DICTIONARY_WORD_LENGTH 4 +#define SHARED_BROTLI_MAX_DICTIONARY_WORD_LENGTH 31 +#define SHARED_BROTLI_NUM_DICTIONARY_CONTEXTS 64 +#define SHARED_BROTLI_MAX_COMPOUND_DICTS 15 + +/** + * Opaque structure that holds shared dictionary data. + * + * Allocated and initialized with ::BrotliSharedDictionaryCreateInstance. + * Cleaned up and deallocated with ::BrotliSharedDictionaryDestroyInstance. + */ +typedef struct BrotliSharedDictionaryStruct BrotliSharedDictionary; + +/** + * Input data type for ::BrotliSharedDictionaryAttach. + */ +typedef enum BrotliSharedDictionaryType { + /** Raw LZ77 prefix dictionary. */ + BROTLI_SHARED_DICTIONARY_RAW = 0, + /** Serialized shared dictionary. + * + * DO NOT USE: methods accepting this value will fail. + */ + BROTLI_SHARED_DICTIONARY_SERIALIZED = 1 +} BrotliSharedDictionaryType; + +/** + * Creates an instance of ::BrotliSharedDictionary. + * + * Fresh instance has default word dictionary and transforms + * and no LZ77 prefix dictionary. + * + * @p alloc_func and @p free_func @b MUST be both zero or both non-zero. In the + * case they are both zero, default memory allocators are used. @p opaque is + * passed to @p alloc_func and @p free_func when they are called. @p free_func + * has to return without doing anything when asked to free a NULL pointer. + * + * @param alloc_func custom memory allocation function + * @param free_func custom memory free function + * @param opaque custom memory manager handle + * @returns @c 0 if instance can not be allocated or initialized + * @returns pointer to initialized ::BrotliSharedDictionary otherwise + */ +BROTLI_COMMON_API BrotliSharedDictionary* BrotliSharedDictionaryCreateInstance( + brotli_alloc_func alloc_func, brotli_free_func free_func, void* opaque); + +/** + * Deinitializes and frees ::BrotliSharedDictionary instance. + * + * @param dict shared dictionary instance to be cleaned up and deallocated + */ +BROTLI_COMMON_API void BrotliSharedDictionaryDestroyInstance( + BrotliSharedDictionary* dict); + +/** + * Attaches dictionary to a given instance of ::BrotliSharedDictionary. + * + * Dictionary to be attached is represented in a serialized format as a region + * of memory. + * + * Provided data it partially referenced by a resulting (compound) dictionary, + * and should be kept untouched, while at least one compound dictionary uses it. + * This way memory overhead is kept minimal by the cost of additional resource + * management. + * + * @param dict dictionary to extend + * @param type type of dictionary to attach + * @param data_size size of @p data + * @param data serialized dictionary of type @p type, with at least @p data_size + * addressable bytes + * @returns ::BROTLI_TRUE if provided dictionary is successfully attached + * @returns ::BROTLI_FALSE otherwise + */ +BROTLI_COMMON_API BROTLI_BOOL BrotliSharedDictionaryAttach( + BrotliSharedDictionary* dict, BrotliSharedDictionaryType type, + size_t data_size, const uint8_t data[BROTLI_ARRAY_PARAM(data_size)]); + +#if defined(__cplusplus) || defined(c_plusplus) +} /* extern "C" */ +#endif + +#endif /* BROTLI_COMMON_SHARED_DICTIONARY_H_ */ diff --git a/Sources/CBrotliDec/include/brotli/types.h b/Sources/CBrotliDec/include/brotli/types.h new file mode 100644 index 0000000..2dc61ff --- /dev/null +++ b/Sources/CBrotliDec/include/brotli/types.h @@ -0,0 +1,83 @@ +/* Copyright 2013 Google Inc. All Rights Reserved. + + Distributed under MIT license. + See file LICENSE for detail or copy at https://opensource.org/licenses/MIT +*/ + +/** + * @file + * Common types used in decoder and encoder API. + */ + +#ifndef BROTLI_COMMON_TYPES_H_ +#define BROTLI_COMMON_TYPES_H_ + +#include /* IWYU pragma: export */ + +#if defined(_MSC_VER) && (_MSC_VER < 1600) +typedef __int8 int8_t; +typedef unsigned __int8 uint8_t; +typedef __int16 int16_t; +typedef unsigned __int16 uint16_t; +typedef __int32 int32_t; +typedef unsigned __int32 uint32_t; +typedef unsigned __int64 uint64_t; +typedef __int64 int64_t; +#else +#include /* IWYU pragma: export */ +#endif /* defined(_MSC_VER) && (_MSC_VER < 1600) */ + +/** + * A portable @c bool replacement. + * + * ::BROTLI_BOOL is a "documentation" type: actually it is @c int, but in API it + * denotes a type, whose only values are ::BROTLI_TRUE and ::BROTLI_FALSE. + * + * ::BROTLI_BOOL values passed to Brotli should either be ::BROTLI_TRUE or + * ::BROTLI_FALSE, or be a result of ::TO_BROTLI_BOOL macros. + * + * ::BROTLI_BOOL values returned by Brotli should not be tested for equality + * with @c true, @c false, ::BROTLI_TRUE, ::BROTLI_FALSE, but rather should be + * evaluated, for example: @code{.cpp} + * if (SomeBrotliFunction(encoder, BROTLI_TRUE) && + * !OtherBrotliFunction(decoder, BROTLI_FALSE)) { + * bool x = !!YetAnotherBrotliFunction(encoder, TO_BROLTI_BOOL(2 * 2 == 4)); + * DoSomething(x); + * } + * @endcode + */ +#define BROTLI_BOOL int +/** Portable @c true replacement. */ +#define BROTLI_TRUE 1 +/** Portable @c false replacement. */ +#define BROTLI_FALSE 0 +/** @c bool to ::BROTLI_BOOL conversion macros. */ +#define TO_BROTLI_BOOL(X) (!!(X) ? BROTLI_TRUE : BROTLI_FALSE) + +#define BROTLI_MAKE_UINT64_T(high, low) ((((uint64_t)(high)) << 32) | low) + +#define BROTLI_UINT32_MAX (~((uint32_t)0)) +#define BROTLI_SIZE_MAX (~((size_t)0)) + +/** + * Allocating function pointer type. + * + * @param opaque custom memory manager handle provided by client + * @param size requested memory region size; can not be @c 0 + * @returns @c 0 in the case of failure + * @returns a valid pointer to a memory region of at least @p size bytes + * long otherwise + */ +typedef void* (*brotli_alloc_func)(void* opaque, size_t size); + +/** + * Deallocating function pointer type. + * + * This function @b SHOULD do nothing if @p address is @c 0. + * + * @param opaque custom memory manager handle provided by client + * @param address memory region pointer returned by ::brotli_alloc_func, or @c 0 + */ +typedef void (*brotli_free_func)(void* opaque, void* address); + +#endif /* BROTLI_COMMON_TYPES_H_ */ diff --git a/Sources/PatchHostBridge/AsyncCallBroker.swift b/Sources/PatchHostBridge/AsyncCallBroker.swift index 8ef5f7f..f5805b7 100644 --- a/Sources/PatchHostBridge/AsyncCallBroker.swift +++ b/Sources/PatchHostBridge/AsyncCallBroker.swift @@ -1,6 +1,9 @@ // SPDX-License-Identifier: MIT import Foundation +#if canImport(FoundationNetworking) +import FoundationNetworking +#endif // =========================================================================== // PatchAsyncCallBroker — the HOST-side capture + resolve for ASYNC routed calls diff --git a/Sources/PatchHostBridge/AsyncHostBridge.swift b/Sources/PatchHostBridge/AsyncHostBridge.swift index 53d2a8f..8783311 100644 --- a/Sources/PatchHostBridge/AsyncHostBridge.swift +++ b/Sources/PatchHostBridge/AsyncHostBridge.swift @@ -1,6 +1,9 @@ // SPDX-License-Identifier: MIT import Foundation +#if canImport(FoundationNetworking) +import FoundationNetworking +#endif // =========================================================================== // AsyncHostBridge — the ASYNC half of the generalized "call what's already diff --git a/Sources/PatchSDK/AnalyticsBridge.swift b/Sources/PatchSDK/AnalyticsBridge.swift index 040dba6..46a2fde 100644 --- a/Sources/PatchSDK/AnalyticsBridge.swift +++ b/Sources/PatchSDK/AnalyticsBridge.swift @@ -97,12 +97,25 @@ public struct AnalyticsBridge: Bridge { // NSNumber covers JSON numbers AND bools. Render bools as // "true"/"false"; integers without a trailing ".0"; other numbers // via their natural description. + #if canImport(Darwin) if CFGetTypeID(n) == CFBooleanGetTypeID() { return n.boolValue ? "true" : "false" } if CFNumberIsFloatType(n) { return "\(n.doubleValue)" } + #else + // No CoreFoundation type queries off Darwin (Android): use the + // NSNumber's objCType instead. Bools are "c"; floating point is + // "f"/"d". JSON never yields an 8-bit integer, so "c" is unambiguous. + let type = String(cString: n.objCType) + if type == "c" || type == "B" { + return n.boolValue ? "true" : "false" + } + if type == "f" || type == "d" { + return "\(n.doubleValue)" + } + #endif return "\(n.int64Value)" default: // NSNull, nested [String:Any], [Any] → not a flat scalar; drop it. diff --git a/Sources/PatchSDK/Bridges.swift b/Sources/PatchSDK/Bridges.swift index 0e323d7..ca6239e 100644 --- a/Sources/PatchSDK/Bridges.swift +++ b/Sources/PatchSDK/Bridges.swift @@ -1,6 +1,9 @@ // SPDX-License-Identifier: MIT import Foundation +#if canImport(FoundationNetworking) +import FoundationNetworking +#endif import WasmKit #if canImport(os) import os @@ -210,7 +213,9 @@ public final class BridgeRegistry: @unchecked Sendable { register(UserDefaultsBridge(defaults: userDefaults)) register(NotificationCenterBridge(center: notificationCenter)) register(NavigationBridge(handler: navigation)) + #if canImport(Security) register(KeychainBridge()) + #endif register(DateLocaleBridge()) register(JSONBridge()) // The Embedded-Swift "borrow the shell's Foundation" surface @@ -500,6 +505,11 @@ public struct NavigationBridge: Bridge { // bridge is structured + compiles cross-platform and is treated as // **device-only** for behavioral testing. The marshalling layer around it IS // unit-tested via a custom-bridge stub. +// +// Apple-only (`canImport(Security)`). Off Apple platforms (Android) the bridge is +// not registered: a module importing `keychain_*` fails to instantiate and the +// loader falls back, rather than pretending secrets were stored. +#if canImport(Security) public struct KeychainBridge: Bridge { public let module = "patch" private let service: String @@ -566,6 +576,7 @@ public enum Keychain { return s == errSecSuccess || s == errSecItemNotFound } } +#endif // MARK: - 6. Date / Locale // @@ -757,7 +768,15 @@ public struct FoundationBridge: Bridge { public static func jsonGetBool(_ jsonBytes: [UInt8], key: String) -> Bool? { guard let obj = try? JSONSerialization.jsonObject(with: Data(jsonBytes)) as? [String: Any], let raw = obj[key] else { return nil } - guard let n = raw as? NSNumber, CFGetTypeID(n) == CFBooleanGetTypeID() else { return nil } + guard let n = raw as? NSNumber else { return nil } + #if canImport(Darwin) + guard CFGetTypeID(n) == CFBooleanGetTypeID() else { return nil } + #else + // No CoreFoundation type queries off Darwin (Android): JSON bools are + // the only NSNumbers JSONSerialization yields with objCType "c"/"B". + let type = String(cString: n.objCType) + guard type == "c" || type == "B" else { return nil } + #endif return n.boolValue } @@ -941,6 +960,10 @@ public struct FoundationBridge: Bridge { /// `dateContext`/`relativeContext` are Unix MILLIS. Locale-aware via the shell's /// real ICU (empty locale → current). This is the `SettingsScreen.relativeString` /// bug-fix shape — "2 hr ago", "yesterday", "in 3 days". + /// + /// Apple-only: Foundation off Darwin (Android) has no + /// `RelativeDateTimeFormatter`, so the host fn is not registered there. + #if canImport(Darwin) public static func relativeDateFormat(forMillis: Int64, relativeToMillis: Int64, unitsStyle: Int32, locale: String) -> String { let f = RelativeDateTimeFormatter() @@ -955,6 +978,7 @@ public struct FoundationBridge: Bridge { let ref = Date(timeIntervalSince1970: Double(relativeToMillis) / 1000.0) return f.localizedString(for: d, relativeTo: ref) } + #endif /// `date_format_styled` — `DateFormatter` with `dateStyle`/`timeStyle` (the /// localized-style builder, distinct from the pattern-based `date_format`). @@ -1168,6 +1192,7 @@ public struct FoundationBridge: Bridge { // ---- LEVER #2: Date/Calendar/Formatter host bridges -------------------- // relative_date_format(forMillis, relativeToMillis, unitsStyle, loc ptr,len) -> packed string. + #if canImport(Darwin) imports.host(module, "relative_date_format", [.i64, .i64, .i32, .i32, .i32], [.i64], store: store) { caller, args in let ctx = BridgeContext(caller: caller) let loc = try ctx.readString(ptr: args[3].i32, len: args[4].i32) @@ -1177,6 +1202,7 @@ public struct FoundationBridge: Bridge { locale: loc) return [try ctx.packedResult(s)] } + #endif // date_format_styled(unixMillis, dateStyle, timeStyle, loc ptr,len, tz ptr,len) -> packed string. imports.host(module, "date_format_styled", [.i64, .i32, .i32, .i32, .i32, .i32, .i32], [.i64], store: store) { caller, args in let ctx = BridgeContext(caller: caller) diff --git a/Sources/PatchSDK/Brotli.swift b/Sources/PatchSDK/Brotli.swift index 114a7c1..9d0402b 100644 --- a/Sources/PatchSDK/Brotli.swift +++ b/Sources/PatchSDK/Brotli.swift @@ -1,7 +1,7 @@ // SPDX-License-Identifier: MIT import Foundation -import Compression +import CBrotliDec /// Brotli decompression for downloaded modules. /// @@ -16,9 +16,10 @@ import Compression /// (`hashlib.sha256(wasm_bytes)` in `routes/modules.py`, before brotli). So the /// loader inflates first, then verifies the inflated bytes against `sha256`. /// -/// Uses Apple's `Compression` framework (`COMPRESSION_BROTLI`, available on -/// macOS 12+ / iOS 15+ — within the SDK's macOS 14 / iOS 15 floor). Verified to -/// round-trip Python's `brotli.compress()` output. No third-party dependency. +/// Uses Google's reference Brotli decoder, vendored as the `CBrotliDec` target +/// (MIT, see `Sources/CBrotliDec/README.md`), instead of Apple's `Compression` +/// framework, so the same code path builds and behaves identically on Apple +/// platforms and Android. public enum Brotli { public enum BrotliError: Error, CustomStringConvertible, Equatable { @@ -33,52 +34,58 @@ public enum Brotli { } } - /// Inflate a brotli stream. `sizeHint` seeds the output buffer (use the - /// backend-reported uncompressed `size` when known); the buffer grows - /// automatically if the hint is too small. + /// Upper bound on inflated output; a stream that would exceed it is + /// rejected as corrupt (guards against decompression bombs). + private static let maxOutput = 512 * 1024 * 1024 + + /// Size of the scratch buffer each decoder step writes into. + private static let chunkSize = 64 * 1024 + + /// Inflate a brotli stream. `sizeHint` pre-sizes the output buffer (use the + /// backend-reported uncompressed `size` when known); the output grows as + /// needed if the hint is too small or absent. public static func decompress(_ input: Data, sizeHint: Int = 0) throws -> Data { guard !input.isEmpty else { throw BrotliError.empty } - // Brotli ratios on wasm are typically 2–4x; start at 8x the input (or - // the hint, whichever is larger) and grow on overflow. - var capacity = max(sizeHint, max(input.count * 8, 64 * 1024)) - let maxCapacity = 512 * 1024 * 1024 - while true { - var produced = 0 - var overflowed = false - let dst = try decodeOnce(input, capacity: capacity, produced: &produced, overflowed: &overflowed) - if overflowed { - guard capacity < maxCapacity else { throw BrotliError.decodeFailed } - capacity = min(capacity * 2, maxCapacity) - continue - } - guard let dst else { throw BrotliError.decodeFailed } - return dst.prefix(produced) + guard let state = BrotliDecoderCreateInstance(nil, nil, nil) else { + throw BrotliError.decodeFailed } - } + defer { BrotliDecoderDestroyInstance(state) } + + var output = Data() + // Brotli ratios on wasm are typically 2–4x. + output.reserveCapacity(min(max(sizeHint, input.count * 4), maxOutput)) + var chunk = [UInt8](repeating: 0, count: chunkSize) - private static func decodeOnce( - _ input: Data, - capacity: Int, - produced: inout Int, - overflowed: inout Bool - ) throws -> Data? { - var dst = Data(count: capacity) - let n = dst.withUnsafeMutableBytes { (dstPtr: UnsafeMutableRawBufferPointer) -> Int in - input.withUnsafeBytes { (srcPtr: UnsafeRawBufferPointer) -> Int in - guard let dstBase = dstPtr.bindMemory(to: UInt8.self).baseAddress, - let srcBase = srcPtr.bindMemory(to: UInt8.self).baseAddress else { return 0 } - return compression_decode_buffer( - dstBase, capacity, - srcBase, input.count, - nil, COMPRESSION_BROTLI) + return try input.withUnsafeBytes { (src: UnsafeRawBufferPointer) -> Data in + var nextIn = src.bindMemory(to: UInt8.self).baseAddress + var availableIn = src.count + while true { + let result = try chunk.withUnsafeMutableBufferPointer { buf -> BrotliDecoderResult in + var nextOut = buf.baseAddress + var availableOut = buf.count + let result = BrotliDecoderDecompressStream( + state, &availableIn, &nextIn, &availableOut, &nextOut, nil) + let produced = buf.count - availableOut + if produced > 0, let base = buf.baseAddress { + guard output.count + produced <= maxOutput else { throw BrotliError.decodeFailed } + output.append(base, count: produced) + } + return result + } + switch result { + case BROTLI_DECODER_RESULT_SUCCESS: + // Trailing bytes after the end of the stream mean the + // payload is not a single well-formed brotli stream. + guard availableIn == 0 else { throw BrotliError.decodeFailed } + return output + case BROTLI_DECODER_RESULT_NEEDS_MORE_OUTPUT: + continue + default: + // ERROR, or NEEDS_MORE_INPUT: all input consumed but the + // stream is incomplete (truncated download). + throw BrotliError.decodeFailed + } } } - // `compression_decode_buffer` returns 0 on error OR when the source was - // genuinely empty. When the result exactly fills `capacity` the output - // was very likely truncated, so grow and retry to be safe. - if n == 0 { return nil } - if n == capacity { overflowed = true; return dst } - produced = n - return dst } } diff --git a/Sources/PatchSDK/DiffApply.swift b/Sources/PatchSDK/DiffApply.swift index 322e1af..747de19 100644 --- a/Sources/PatchSDK/DiffApply.swift +++ b/Sources/PatchSDK/DiffApply.swift @@ -25,7 +25,7 @@ import CBZ2 /// diff stream byte-wise), then copy `extraLen` bytes verbatim from extra, then /// seek the old-file cursor by `seekLen`. /// -/// libbz2 (the `CBZ2` system target) inflates the bz2 streams; everything else is +/// libbz2 (the vendored `CBZ2` target) inflates the bz2 streams; everything else is /// pure Swift. This is a **full, working** implementation, not a stub — the /// loader prefers it when the backend offers a `diff_url`, and always falls back /// to a full-module download on any diff failure (see `ModuleLoader`). diff --git a/Sources/PatchSDK/FileDownloadBridge.swift b/Sources/PatchSDK/FileDownloadBridge.swift index 8abb5d9..dc0a1eb 100644 --- a/Sources/PatchSDK/FileDownloadBridge.swift +++ b/Sources/PatchSDK/FileDownloadBridge.swift @@ -1,6 +1,9 @@ // SPDX-License-Identifier: MIT import Foundation +#if canImport(FoundationNetworking) +import FoundationNetworking +#endif import WasmKit // MARK: - FileDownloadBridge (download a URL to a sandboxed file) diff --git a/Sources/PatchSDK/HandoffBridge.swift b/Sources/PatchSDK/HandoffBridge.swift index c6aa174..f687163 100644 --- a/Sources/PatchSDK/HandoffBridge.swift +++ b/Sources/PatchSDK/HandoffBridge.swift @@ -76,10 +76,15 @@ public struct HandoffBridge: Bridge { /// thread (it is UI/responder-chain bound). Guarded by `canImport(Foundation)` /// (always true on Apple platforms) to mirror the guide's pattern. public init() { + #if canImport(Darwin) let store = HandoffStore() self.init( start: { activity in store.start(activity) }, stop: { type in store.stop(type) }) + #else + // No NSUserActivity / Handoff off Apple platforms (Android): no-op. + self.init(start: { _ in }, stop: { _ in }) + #endif } #endif @@ -125,7 +130,7 @@ public struct HandoffBridge: Bridge { } } -#if canImport(Foundation) +#if canImport(Darwin) /// Thread-safe registry of currently-active `NSUserActivity`s, keyed by type, so /// `stop` can invalidate the matching one. All `NSUserActivity` mutation hops to /// the main thread. diff --git a/Sources/PatchSDK/ModuleLoader.swift b/Sources/PatchSDK/ModuleLoader.swift index 29fb4c1..e1dfb04 100644 --- a/Sources/PatchSDK/ModuleLoader.swift +++ b/Sources/PatchSDK/ModuleLoader.swift @@ -1,6 +1,9 @@ // SPDX-License-Identifier: MIT import Foundation +#if canImport(FoundationNetworking) +import FoundationNetworking +#endif /// Downloads, decompresses, verifies, caches, and activates OTA modules. /// diff --git a/Sources/PatchSDK/NetworkImageBridge.swift b/Sources/PatchSDK/NetworkImageBridge.swift index cc9793c..97e8c8c 100644 --- a/Sources/PatchSDK/NetworkImageBridge.swift +++ b/Sources/PatchSDK/NetworkImageBridge.swift @@ -1,6 +1,9 @@ // SPDX-License-Identifier: MIT import Foundation +#if canImport(FoundationNetworking) +import FoundationNetworking +#endif import WasmKit // MARK: - NetworkImage bridge (download + cache a remote image → bytes) diff --git a/Sources/PatchSDK/Patch.swift b/Sources/PatchSDK/Patch.swift index 5c6b43a..915b068 100644 --- a/Sources/PatchSDK/Patch.swift +++ b/Sources/PatchSDK/Patch.swift @@ -1,6 +1,9 @@ // SPDX-License-Identifier: MIT import Foundation +#if canImport(FoundationNetworking) +import FoundationNetworking +#endif import WasmKit import PatchHostBridge // (No UIKit import: the only former UIKit use here — `UIDevice.current.systemVersion` diff --git a/Sources/PatchSDK/PatchHTTPBridge.swift b/Sources/PatchSDK/PatchHTTPBridge.swift index cab03be..4425138 100644 --- a/Sources/PatchSDK/PatchHTTPBridge.swift +++ b/Sources/PatchSDK/PatchHTTPBridge.swift @@ -1,6 +1,9 @@ // SPDX-License-Identifier: MIT import Foundation +#if canImport(FoundationNetworking) +import FoundationNetworking +#endif import WasmKit // MARK: - Breakthrough #6 — NETWORKING (URLSession) async host bridge diff --git a/Sources/PatchSDK/ProcessInfoBridge.swift b/Sources/PatchSDK/ProcessInfoBridge.swift index e00697e..d2dd1cc 100644 --- a/Sources/PatchSDK/ProcessInfoBridge.swift +++ b/Sources/PatchSDK/ProcessInfoBridge.swift @@ -86,6 +86,7 @@ public struct ProcessInfoBridge: Bridge { static func snapshot() -> ProcessFacts { let info = ProcessInfo.processInfo let thermal: ProcessFacts.ThermalState + #if canImport(Darwin) switch info.thermalState { case .nominal: thermal = .nominal case .fair: thermal = .fair @@ -93,10 +94,17 @@ public struct ProcessInfoBridge: Bridge { case .critical: thermal = .critical @unknown default: thermal = .nominal } + let lowPowerMode = info.isLowPowerModeEnabled + #else + // Foundation off Darwin (Android) exposes neither thermal state nor + // low-power mode; report the neutral values. + thermal = .nominal + let lowPowerMode = false + #endif let v = info.operatingSystemVersion return ProcessFacts( thermalState: thermal, - lowPowerMode: info.isLowPowerModeEnabled, + lowPowerMode: lowPowerMode, osVersion: "\(v.majorVersion).\(v.minorVersion).\(v.patchVersion)", processorCount: info.processorCount, activeProcessorCount: info.activeProcessorCount, diff --git a/Sources/PatchSDK/ResourceOverlayRedirect.swift b/Sources/PatchSDK/ResourceOverlayRedirect.swift index a968f74..9e3e25b 100644 --- a/Sources/PatchSDK/ResourceOverlayRedirect.swift +++ b/Sources/PatchSDK/ResourceOverlayRedirect.swift @@ -104,9 +104,12 @@ public final class ResourceOverlayRedirect: @unchecked Sendable { /// Install the ObjC swizzles for the named-lookup accessors. Idempotent + only /// ever called once (guarded by `installed`). On platforms without UIKit only the - /// Foundation `Bundle.localizedString` swizzle is installed. + /// Foundation `Bundle.localizedString` swizzle is installed. Without the ObjC + /// runtime (Android) there is nothing to swizzle, so this is a no-op. static func installSwizzles() { + #if canImport(ObjectiveC) OverlaySwizzles.installAll() + #endif } } diff --git a/Sources/PatchSDK/SHA256.swift b/Sources/PatchSDK/SHA256.swift index 9caa47e..aede635 100644 --- a/Sources/PatchSDK/SHA256.swift +++ b/Sources/PatchSDK/SHA256.swift @@ -1,13 +1,18 @@ // SPDX-License-Identifier: MIT import Foundation +#if canImport(CryptoKit) import CryptoKit +#else +import Crypto +#endif /// SHA-256 helper used by the loader to verify downloaded / reconstructed /// modules against the `sha256` the backend reports in an update check. /// -/// Uses Apple `CryptoKit` (available on iOS 13+ / macOS 10.15+), so there is no -/// third-party crypto dependency and it is identical on device + simulator. +/// Uses Apple `CryptoKit` on Apple platforms (available on iOS 13+ / macOS +/// 10.15+). Elsewhere (Android) it uses Apple's `swift-crypto` package, which +/// exposes the same `SHA256` API, so this file is identical on every platform. public enum SHA256Hash { /// Lowercase hex SHA-256 of `data`. This matches the backend, which stores /// `hashlib.sha256(wasm_bytes).hexdigest()` (lowercase hex of the **raw**, diff --git a/Sources/PatchSDK/UpdateChecker.swift b/Sources/PatchSDK/UpdateChecker.swift index bcfcb93..ddd0208 100644 --- a/Sources/PatchSDK/UpdateChecker.swift +++ b/Sources/PatchSDK/UpdateChecker.swift @@ -1,6 +1,9 @@ // SPDX-License-Identifier: MIT import Foundation +#if canImport(FoundationNetworking) +import FoundationNetworking +#endif // MARK: - Wire protocol (matches backend/app/schemas/module.py + event.py EXACTLY) diff --git a/Sources/PatchSDK/UpdateState.swift b/Sources/PatchSDK/UpdateState.swift index e3536cc..39b54ed 100644 --- a/Sources/PatchSDK/UpdateState.swift +++ b/Sources/PatchSDK/UpdateState.swift @@ -1,6 +1,9 @@ // SPDX-License-Identifier: MIT import Foundation +#if canImport(Combine) +import Combine +#endif // MARK: - UpdateInfo @@ -69,14 +72,26 @@ public enum PatchUpdateState: Sendable, Equatable { /// main actor as the imperative flow progresses, so views re-render /// automatically. The current `UpdateInfo` (if any) is mirrored on `available` /// for convenient binding. +/// +/// Where Combine is unavailable (Android) the type is not an `ObservableObject` +/// and its properties are plain stored values: readable, but not published. @MainActor -public final class PatchUpdateStateObservable: ObservableObject { +public final class PatchUpdateStateObservable { + #if canImport(Combine) /// The current phase of the update flow. Bind to this in SwiftUI. @Published public private(set) var state: PatchUpdateState = .idle /// The most recently discovered available update, if any (mirrors the /// `.available` / `.readyToReload` payload for convenient access). @Published public private(set) var available: UpdateInfo? + #else + /// The current phase of the update flow. + public private(set) var state: PatchUpdateState = .idle + + /// The most recently discovered available update, if any (mirrors the + /// `.available` / `.readyToReload` payload for convenient access). + public private(set) var available: UpdateInfo? + #endif /// `nonisolated` so the owning `Patch` can construct it from its nonisolated /// `init()`. Only sets the two stored defaults; no observers exist yet, so @@ -98,3 +113,7 @@ public final class PatchUpdateStateObservable: ObservableObject { } } } + +#if canImport(Combine) +extension PatchUpdateStateObservable: ObservableObject {} +#endif diff --git a/Tests/PatchSDKTests/AppKeyOnlyConfigurationTests.swift b/Tests/PatchSDKTests/AppKeyOnlyConfigurationTests.swift index 7c6c52c..a4fcc93 100644 --- a/Tests/PatchSDKTests/AppKeyOnlyConfigurationTests.swift +++ b/Tests/PatchSDKTests/AppKeyOnlyConfigurationTests.swift @@ -1,6 +1,9 @@ // SPDX-License-Identifier: MIT import XCTest +#if canImport(FoundationNetworking) +import FoundationNetworking +#endif @testable import PatchSDK /// The snippet-only integration — `Patch.configure(.init(appKey: "pak_…"))`, diff --git a/Tests/PatchSDKTests/BugHuntSDK8Tests.swift b/Tests/PatchSDKTests/BugHuntSDK8Tests.swift index a828cf2..ee3b40b 100644 --- a/Tests/PatchSDKTests/BugHuntSDK8Tests.swift +++ b/Tests/PatchSDKTests/BugHuntSDK8Tests.swift @@ -1,6 +1,9 @@ // SPDX-License-Identifier: MIT import XCTest +#if canImport(FoundationNetworking) +import FoundationNetworking +#endif import WasmKit @testable import PatchSDK #if canImport(SwiftUI) diff --git a/Tests/PatchSDKTests/BugHuntSDK9Tests.swift b/Tests/PatchSDKTests/BugHuntSDK9Tests.swift index 5bd4755..9197734 100644 --- a/Tests/PatchSDKTests/BugHuntSDK9Tests.swift +++ b/Tests/PatchSDKTests/BugHuntSDK9Tests.swift @@ -2,6 +2,9 @@ import XCTest import Foundation +#if canImport(FoundationNetworking) +import FoundationNetworking +#endif import PatchViewIR @testable import PatchSDK #if canImport(SwiftUI) @@ -256,6 +259,7 @@ final class BugHuntSDK9Tests: XCTestCase { /// Forward direction: activating a module that DOES ship a manifest still ends with that /// module's manifest cached (the fix must not disable the W5b pre-warm optimisation). + #if canImport(SwiftUI) func testActivationStillPrewarmsTheNewModulesManifest() throws { let patch = Patch() try patch.activate(bytes: try manifestlessModule()) @@ -266,6 +270,7 @@ final class BugHuntSDK9Tests: XCTestCase { let manifest = try JSONDecoder().decode(PatchViewManifest.self, from: Data(cached)) XCTAssertTrue(manifest.views.contains { $0.type == "Banner" }) } + #endif // ===================================================================================== // MARK: - BUG 3 — brotli detection broke on any URL carrying a query string diff --git a/Tests/PatchSDKTests/BugHuntSDKRound1Tests.swift b/Tests/PatchSDKTests/BugHuntSDKRound1Tests.swift index 441aa2f..afb1866 100644 --- a/Tests/PatchSDKTests/BugHuntSDKRound1Tests.swift +++ b/Tests/PatchSDKTests/BugHuntSDKRound1Tests.swift @@ -2,7 +2,9 @@ import XCTest import Foundation +#if canImport(Combine) import Combine +#endif @testable import PatchSDK import PatchViewIR #if canImport(SwiftUI) diff --git a/Tests/PatchSDKTests/ColdStartMainThreadSafetyTests.swift b/Tests/PatchSDKTests/ColdStartMainThreadSafetyTests.swift index fe9e14b..c42a452 100644 --- a/Tests/PatchSDKTests/ColdStartMainThreadSafetyTests.swift +++ b/Tests/PatchSDKTests/ColdStartMainThreadSafetyTests.swift @@ -81,6 +81,7 @@ final class ColdStartMainThreadSafetyTests: XCTestCase { /// After activate(), `cachedManifestBytes()` is non-nil when the module /// exports `patch_view_manifest` — the manifest was fetched on the /// activationQueue, not deferred to the first body eval on main. + #if canImport(SwiftUI) func testManifestCachedAfterActivation() throws { guard let url = Bundle.module.url(forResource: "EngineSettingsView", withExtension: "wasm") else { @@ -100,6 +101,7 @@ final class ColdStartMainThreadSafetyTests: XCTestCase { } // No crash = pre-warm ran without trapping. } + #endif /// cachedManifestBytes() is nil after deactivate() — the stale cache is cleared. func testManifestCacheIsNilAfterDeactivate() throws { @@ -122,6 +124,7 @@ final class ColdStartMainThreadSafetyTests: XCTestCase { /// We can't directly observe the handle-cache hit, but a successful call /// proves the export is reachable (and implicitly that the handle is memoized /// from the pre-warm, since WasmKit exports are immutable post-init). + #if canImport(SwiftUI) func testViewBodyExportCallableAfterPrewarm() throws { guard let url = Bundle.module.url(forResource: "EngineSettingsView", withExtension: "wasm") else { @@ -145,4 +148,5 @@ final class ColdStartMainThreadSafetyTests: XCTestCase { XCTAssertNotNil(result, "W5a: pre-warmed view_body export must be callable after prewarmViewBodyExports()") } + #endif } diff --git a/Tests/PatchSDKTests/DiffApplyTests.swift b/Tests/PatchSDKTests/DiffApplyTests.swift index ff8cdd1..267f64c 100644 --- a/Tests/PatchSDKTests/DiffApplyTests.swift +++ b/Tests/PatchSDKTests/DiffApplyTests.swift @@ -124,6 +124,28 @@ final class DiffApplyTests: XCTestCase { } } + func testBrotliRejectsTruncatedStream() throws { + let compressed = try fixture("diff_new", "br") + let truncated = compressed.prefix(compressed.count / 2) + XCTAssertThrowsError(try Brotli.decompress(truncated)) { err in + XCTAssertEqual(err as? Brotli.BrotliError, .decodeFailed) + } + } + + func testBrotliRejectsGarbage() { + XCTAssertThrowsError(try Brotli.decompress(Data(repeating: 0xFF, count: 64))) { err in + XCTAssertEqual(err as? Brotli.BrotliError, .decodeFailed) + } + } + + func testBrotliRejectsTrailingBytes() throws { + var compressed = try fixture("diff_new", "br") + compressed.append(contentsOf: [0x00, 0x01, 0x02]) + XCTAssertThrowsError(try Brotli.decompress(compressed)) { err in + XCTAssertEqual(err as? Brotli.BrotliError, .decodeFailed) + } + } + // MARK: - SHA-256 func testSHA256MatchesBackendHexFormat() throws { diff --git a/Tests/PatchSDKTests/FileDownloadBridgeTests.swift b/Tests/PatchSDKTests/FileDownloadBridgeTests.swift index adee16d..8f92ca9 100644 --- a/Tests/PatchSDKTests/FileDownloadBridgeTests.swift +++ b/Tests/PatchSDKTests/FileDownloadBridgeTests.swift @@ -1,6 +1,9 @@ // SPDX-License-Identifier: MIT import XCTest +#if canImport(FoundationNetworking) +import FoundationNetworking +#endif import WasmKit @testable import PatchSDK diff --git a/Tests/PatchSDKTests/GenericHostBridgeTests.swift b/Tests/PatchSDKTests/GenericHostBridgeTests.swift index fac186c..5330627 100644 --- a/Tests/PatchSDKTests/GenericHostBridgeTests.swift +++ b/Tests/PatchSDKTests/GenericHostBridgeTests.swift @@ -438,11 +438,16 @@ final class HandleTableTests: XCTestCase { let t = HandleTable() weak var weakBox: Box? var h: Int32 = 0 - autoreleasepool { + let scope = { let b = Box(7) weakBox = b h = t.retain(b) } + #if canImport(ObjectiveC) + autoreleasepool(invoking: scope) + #else + scope() // No autorelease pools without the ObjC runtime (Android). + #endif // The host table is the only strong ref now; the object is still alive. XCTAssertNotNil(weakBox, "the host table retains the object") XCTAssertNotNil(t.resolve(h)) diff --git a/Tests/PatchSDKTests/HostBridgeActivationTests.swift b/Tests/PatchSDKTests/HostBridgeActivationTests.swift index 099154e..a0c46fa 100644 --- a/Tests/PatchSDKTests/HostBridgeActivationTests.swift +++ b/Tests/PatchSDKTests/HostBridgeActivationTests.swift @@ -2,7 +2,11 @@ import XCTest import Foundation +#if canImport(CryptoKit) import CryptoKit +#else +import Crypto +#endif import WasmKit @testable import PatchSDK @testable import PatchHostBridge diff --git a/Tests/PatchSDKTests/HostBridgeFamilyTests.swift b/Tests/PatchSDKTests/HostBridgeFamilyTests.swift index 7fd2b29..7a66e1e 100644 --- a/Tests/PatchSDKTests/HostBridgeFamilyTests.swift +++ b/Tests/PatchSDKTests/HostBridgeFamilyTests.swift @@ -1,6 +1,9 @@ // SPDX-License-Identifier: MIT import XCTest +#if canImport(FoundationNetworking) +import FoundationNetworking +#endif import WasmKit @testable import PatchSDK diff --git a/Tests/PatchSDKTests/HostBridgeVerticalSliceTests.swift b/Tests/PatchSDKTests/HostBridgeVerticalSliceTests.swift index a47d473..a1b1422 100644 --- a/Tests/PatchSDKTests/HostBridgeVerticalSliceTests.swift +++ b/Tests/PatchSDKTests/HostBridgeVerticalSliceTests.swift @@ -2,7 +2,11 @@ import XCTest import Foundation +#if canImport(CryptoKit) import CryptoKit +#else +import Crypto +#endif import WasmKit import WasmKitWASI @testable import PatchHostBridge diff --git a/Tests/PatchSDKTests/ImageFilterBridgeTests.swift b/Tests/PatchSDKTests/ImageFilterBridgeTests.swift index 99f7ac1..39a4313 100644 --- a/Tests/PatchSDKTests/ImageFilterBridgeTests.swift +++ b/Tests/PatchSDKTests/ImageFilterBridgeTests.swift @@ -36,21 +36,27 @@ final class ImageFilterBridgeTests: XCTestCase { // MARK: - applyFilter (real CoreImage on macOS) + #if canImport(CoreImage) func testApplyRealSepiaProducesPNG() throws { let out = try XCTUnwrap(ImageFilterBridge.applyFilter(try samplePNG(), name: "CISepiaTone")) XCTAssertFalse(out.isEmpty) // PNG magic number. XCTAssertEqual(Array(out.prefix(4)), [0x89, 0x50, 0x4E, 0x47]) } + #endif + #if canImport(CoreImage) func testApplyInvalidInputBytesReturnsNil() { XCTAssertNil(ImageFilterBridge.applyFilter([0, 1, 2, 3], name: "CISepiaTone")) XCTAssertNil(ImageFilterBridge.applyFilter([], name: "CISepiaTone")) } + #endif + #if canImport(CoreImage) func testApplyUnknownFilterReturnsNil() throws { XCTAssertNil(ImageFilterBridge.applyFilter(try samplePNG(), name: "CINotARealFilter")) } + #endif // MARK: - Fixture (imports patch.apply_filter; exports call_apply_filter) diff --git a/Tests/PatchSDKTests/ImperativeUpdateFailureTests.swift b/Tests/PatchSDKTests/ImperativeUpdateFailureTests.swift index 7e43955..122012e 100644 --- a/Tests/PatchSDKTests/ImperativeUpdateFailureTests.swift +++ b/Tests/PatchSDKTests/ImperativeUpdateFailureTests.swift @@ -1,6 +1,9 @@ // SPDX-License-Identifier: MIT import XCTest +#if canImport(FoundationNetworking) +import FoundationNetworking +#endif import WasmKit @testable import PatchSDK diff --git a/Tests/PatchSDKTests/ImperativeUpdateTests.swift b/Tests/PatchSDKTests/ImperativeUpdateTests.swift index 9245491..743e500 100644 --- a/Tests/PatchSDKTests/ImperativeUpdateTests.swift +++ b/Tests/PatchSDKTests/ImperativeUpdateTests.swift @@ -1,6 +1,9 @@ // SPDX-License-Identifier: MIT import XCTest +#if canImport(FoundationNetworking) +import FoundationNetworking +#endif import WasmKit @testable import PatchSDK diff --git a/Tests/PatchSDKTests/NetworkImageBridgeTests.swift b/Tests/PatchSDKTests/NetworkImageBridgeTests.swift index 52ba088..12c066f 100644 --- a/Tests/PatchSDKTests/NetworkImageBridgeTests.swift +++ b/Tests/PatchSDKTests/NetworkImageBridgeTests.swift @@ -1,6 +1,9 @@ // SPDX-License-Identifier: MIT import XCTest +#if canImport(FoundationNetworking) +import FoundationNetworking +#endif import WasmKit @testable import PatchSDK diff --git a/Tests/PatchSDKTests/PDFGenerateBridgeTests.swift b/Tests/PatchSDKTests/PDFGenerateBridgeTests.swift index 1efb7b6..81098d9 100644 --- a/Tests/PatchSDKTests/PDFGenerateBridgeTests.swift +++ b/Tests/PatchSDKTests/PDFGenerateBridgeTests.swift @@ -45,19 +45,23 @@ final class PDFGenerateBridgeTests: XCTestCase { // MARK: - render (real CoreGraphics/CoreText on macOS) + #if canImport(CoreGraphics) && canImport(CoreText) func testRenderProducesPDFDocument() throws { let out = try XCTUnwrap(PDFGenerateBridge.render(PDFRequest(text: "Hello PDF"))) XCTAssertFalse(out.isEmpty) // "%PDF-" header. XCTAssertEqual(Array(out.prefix(5)), [0x25, 0x50, 0x44, 0x46, 0x2D]) } + #endif + #if canImport(CoreGraphics) && canImport(CoreText) func testRenderLongTextPaginates() throws { // Enough text to overflow one page; render must still succeed (multi-page). let long = String(repeating: "The quick brown fox jumps over the lazy dog. ", count: 400) let out = try XCTUnwrap(PDFGenerateBridge.render(PDFRequest(text: long))) XCTAssertEqual(Array(out.prefix(5)), [0x25, 0x50, 0x44, 0x46, 0x2D]) } + #endif // MARK: - Fixture (generic (ptr,len)->i64; import name `fn`, export `call_a`) @@ -86,6 +90,7 @@ final class PDFGenerateBridgeTests: XCTestCase { // MARK: - Dispatch + #if canImport(CoreGraphics) && canImport(CoreText) func testDispatchDecodesAndPacksRealPDF() throws { let rt = try makeRuntime { req in PDFGenerateBridge.render(req) } let (p, l) = try rt.writeBuffer([UInt8](#"{"text":"Round trip"}"#.utf8)) @@ -93,13 +98,16 @@ final class PDFGenerateBridgeTests: XCTestCase { let out = try readPacked(res[0].i64, from: rt) XCTAssertEqual(Array(out.prefix(5)), [0x25, 0x50, 0x44, 0x46, 0x2D]) } + #endif + #if canImport(CoreGraphics) && canImport(CoreText) func testDispatchInvalidPayloadPacksZero() throws { let rt = try makeRuntime { req in PDFGenerateBridge.render(req) } let (p, l) = try rt.writeBuffer([UInt8]("garbage".utf8)) let res = try rt.invoke("call_a", [.i32(p), .i32(l)]) XCTAssertEqual(res[0].i64, 0) } + #endif func testModuleNamespace() { XCTAssertEqual(PDFGenerateBridge(render: { _ in nil }).module, "patch") diff --git a/Tests/PatchSDKTests/PatchHTTPBridgeTests.swift b/Tests/PatchSDKTests/PatchHTTPBridgeTests.swift index 7402e2b..d6722fe 100644 --- a/Tests/PatchSDKTests/PatchHTTPBridgeTests.swift +++ b/Tests/PatchSDKTests/PatchHTTPBridgeTests.swift @@ -1,6 +1,9 @@ // SPDX-License-Identifier: MIT import XCTest +#if canImport(FoundationNetworking) +import FoundationNetworking +#endif import WasmKit @testable import PatchSDK diff --git a/Tests/PatchSDKTests/PatchIntegrationTests.swift b/Tests/PatchSDKTests/PatchIntegrationTests.swift index 876dd21..f7e3285 100644 --- a/Tests/PatchSDKTests/PatchIntegrationTests.swift +++ b/Tests/PatchSDKTests/PatchIntegrationTests.swift @@ -1,6 +1,9 @@ // SPDX-License-Identifier: MIT import XCTest +#if canImport(FoundationNetworking) +import FoundationNetworking +#endif import WasmKit @testable import PatchSDK diff --git a/Tests/PatchSDKTests/PatchRenderTests.swift b/Tests/PatchSDKTests/PatchRenderTests.swift index cf9bc26..91bc614 100644 --- a/Tests/PatchSDKTests/PatchRenderTests.swift +++ b/Tests/PatchSDKTests/PatchRenderTests.swift @@ -930,6 +930,7 @@ final class PatchRenderTests: XCTestCase { /// The host-owned presentation binding: GET returns the guest flag, SET (a system /// swipe-dismiss or a button) dispatches the event. Same proven bridge as Toggle. + #if canImport(SwiftUI) @MainActor func testPresentationBindingDispatches() throws { var captured: [(String, IRValue)] = [] @@ -948,9 +949,11 @@ final class PatchRenderTests: XCTestCase { _ = dispatcher #endif } + #endif /// The Picker / TabView selection projection helpers extract Int/String tags, and /// `onDelete`/`onMove` dispatch `.array([.int])` payloads. + #if canImport(SwiftUI) @MainActor func testSelectionAndListEditDispatch() throws { #if canImport(SwiftUI) @@ -978,6 +981,7 @@ final class PatchRenderTests: XCTestCase { XCTAssertEqual(captured[0].1, .array([.int(0), .int(2)])) XCTAssertEqual(captured[1].1, .array([.int(0), .int(2)])) } + #endif // MARK: - Design-system TOKENS (v4: ColorRef.hostToken / Modifier.fontToken) diff --git a/Tests/PatchSDKTests/PatchViewModuleTests.swift b/Tests/PatchSDKTests/PatchViewModuleTests.swift index 67175f6..ad49a0a 100644 --- a/Tests/PatchSDKTests/PatchViewModuleTests.swift +++ b/Tests/PatchSDKTests/PatchViewModuleTests.swift @@ -49,6 +49,7 @@ final class PatchViewModuleTests: XCTestCase { /// `Patch.viewBody` returns the guest-emitted tree with real interactive /// controls + their WASM-derived current values. + #if canImport(SwiftUI) func testViewBodyEmitsInteractiveTree() throws { let patch = try makePatch() let tree = try patch.viewBody() // default state ⇒ guest defaults @@ -56,9 +57,11 @@ final class PatchViewModuleTests: XCTestCase { XCTAssertEqual(findStepper(tree), 0, "default badgeCount == 0 (WASM)") XCTAssertEqual(findTextField(tree), "Ada", "default displayName == Ada (WASM)") } + #endif /// A dispatched event runs the guest UPDATE in WASM and re-emits a NEW tree: /// the toggle flips, and the badge stepper's clamp logic runs in WASM. + #if canImport(SwiftUI) func testDispatchRunsUpdateInWasmAndReEmits() throws { let patch = try makePatch() @@ -82,6 +85,7 @@ final class PatchViewModuleTests: XCTestCase { XCTAssertTrue(r.tree.describe().contains("Hello, Grace!"), "greeting recomputed in WASM from the new name") } + #endif #if canImport(SwiftUI) /// `Patch.patchView()` builds a real SwiftUI view backed by the live module, diff --git a/Tests/PatchSDKTests/QRGenerateBridgeTests.swift b/Tests/PatchSDKTests/QRGenerateBridgeTests.swift index 3d44f78..b984056 100644 --- a/Tests/PatchSDKTests/QRGenerateBridgeTests.swift +++ b/Tests/PatchSDKTests/QRGenerateBridgeTests.swift @@ -55,18 +55,22 @@ final class QRGenerateBridgeTests: XCTestCase { // MARK: - generate (real CoreImage on macOS) + #if canImport(CoreImage) func testGenerateProducesPNG() throws { let out = try XCTUnwrap(QRGenerateBridge.generate(QRRequest(text: "https://patch.dev"))) XCTAssertFalse(out.isEmpty) // PNG magic number. XCTAssertEqual(Array(out.prefix(4)), [0x89, 0x50, 0x4E, 0x47]) } + #endif + #if canImport(CoreImage) func testGenerateScaleAffectsSize() throws { let small = try XCTUnwrap(QRGenerateBridge.generate(QRRequest(text: "AAA", scale: 1))) let big = try XCTUnwrap(QRGenerateBridge.generate(QRRequest(text: "AAA", scale: 12))) XCTAssertGreaterThan(big.count, small.count, "a larger scale → more pixels → bigger PNG") } + #endif // MARK: - Fixture (generic (ptr,len)->i64; import name `fn`, export `call_a`) @@ -77,6 +81,8 @@ final class QRGenerateBridgeTests: XCTestCase { [UInt8](try XCTUnwrap(Data(base64Encoded: Self.fixtureBase64))) } + // The dispatch round-trip drives the real CoreImage generator. + #if canImport(CoreImage) private func makeRuntime() throws -> WASMRuntime { let registry = BridgeRegistry() registry.registerFunction(name: "fn", parameters: [.i32, .i32], results: [.i64]) { caller, args in @@ -109,6 +115,7 @@ final class QRGenerateBridgeTests: XCTestCase { let res = try rt.invoke("call_a", [.i32(p), .i32(l)]) XCTAssertEqual(res[0].i64, 0, "empty bytes → nil request → packed 0") } + #endif func testModuleNamespace() { XCTAssertEqual(QRGenerateBridge(generate: { _ in nil }).module, "patch") diff --git a/Tests/PatchSDKTests/ReloadFailurePreservesCurrentTests.swift b/Tests/PatchSDKTests/ReloadFailurePreservesCurrentTests.swift index 96f59f3..80a639a 100644 --- a/Tests/PatchSDKTests/ReloadFailurePreservesCurrentTests.swift +++ b/Tests/PatchSDKTests/ReloadFailurePreservesCurrentTests.swift @@ -1,6 +1,9 @@ // SPDX-License-Identifier: MIT import XCTest +#if canImport(FoundationNetworking) +import FoundationNetworking +#endif import WasmKit @testable import PatchSDK diff --git a/Tests/PatchSDKTests/RenderCapabilitiesTests.swift b/Tests/PatchSDKTests/RenderCapabilitiesTests.swift index fd3cc86..1d940bc 100644 --- a/Tests/PatchSDKTests/RenderCapabilitiesTests.swift +++ b/Tests/PatchSDKTests/RenderCapabilitiesTests.swift @@ -4,9 +4,11 @@ import XCTest import Foundation @testable import PatchSDK import PatchViewIR +// PatchRender's capability model (`PatchRenderFeature`) is platform-neutral; +// only its SwiftUI renderer is guarded, so import it everywhere. +@testable import PatchRender #if canImport(SwiftUI) import SwiftUI -@testable import PatchRender @testable import PatchSwiftUI #endif @@ -324,6 +326,7 @@ final class RenderCapabilitiesTests: XCTestCase { // MARK: - Manifest `minOS` (engine-resolved `if #available` branches) + #if canImport(SwiftUI) func testManifestMinOSDecodesAndGates() throws { let json = """ {"schemaVersion":12,"views":[ @@ -345,6 +348,7 @@ final class RenderCapabilitiesTests: XCTestCase { minOS: ["iOS": "seventeen"]) XCTAssertFalse(garbage.meetsMinimumOS(.iOS(18)), "an unparseable floor for this platform fails closed") } + #endif #if canImport(SwiftUI) @MainActor diff --git a/Tests/PatchSDKTests/StaticTemplateCacheTests.swift b/Tests/PatchSDKTests/StaticTemplateCacheTests.swift index c2f84d7..c1d2654 100644 --- a/Tests/PatchSDKTests/StaticTemplateCacheTests.swift +++ b/Tests/PatchSDKTests/StaticTemplateCacheTests.swift @@ -237,6 +237,7 @@ final class StaticTemplateCacheIntegrationTests: XCTestCase { // MARK: - Manifest JSON decode tests (no SwiftUI required) +#if canImport(SwiftUI) final class StaticManifestDecodeTests: XCTestCase { /// `"isStructurallyStatic":true` decodes correctly. @@ -333,6 +334,7 @@ final class StaticManifestDecodeTests: XCTestCase { XCTAssertEqual(feed.isStructurallyStatic, false, "FeedItem is explicitly non-static") } } +#endif // MARK: - POSITIVE firewall: cache returns the SAME tree regardless of input @@ -347,6 +349,7 @@ final class StaticManifestDecodeTests: XCTestCase { /// These tests simulate the SDK's 3-layer lookup: the static-cache path bypasses the /// input-hash cache, so the tree is retrieved without referencing the input string at /// all (the cache key is typeName+export+epoch only). +#if canImport(SwiftUI) @MainActor final class StaticTemplateCachePositiveFirewallTests: XCTestCase { @@ -509,6 +512,7 @@ final class StaticTemplateCachePositiveFirewallTests: XCTestCase { + "static: \(staticDescribe)\nhash: \(hashDescribe)") } } +#endif // MARK: - Non-static view firewall (real WASM) @@ -518,6 +522,7 @@ final class StaticTemplateCachePositiveFirewallTests: XCTestCase { /// /// We call the real `viewBodyEmission` via a fresh `Patch()` (not the singleton) /// so the test is self-contained and doesn't affect other tests. +#if canImport(SwiftUI) final class NonStaticViewFirewallTests: XCTestCase { private func bannerModule() throws -> [UInt8] { @@ -583,3 +588,4 @@ final class NonStaticViewFirewallTests: XCTestCase { + "got isStructurallyStatic = \(String(describing: banner.isStructurallyStatic))") } } +#endif diff --git a/Tests/PatchSDKTests/UpdateCheckerTests.swift b/Tests/PatchSDKTests/UpdateCheckerTests.swift index efd9365..71bb751 100644 --- a/Tests/PatchSDKTests/UpdateCheckerTests.swift +++ b/Tests/PatchSDKTests/UpdateCheckerTests.swift @@ -1,6 +1,9 @@ // SPDX-License-Identifier: MIT import XCTest +#if canImport(FoundationNetworking) +import FoundationNetworking +#endif @testable import PatchSDK /// D2 — UpdateChecker: wire-protocol parse/decision, telemetry, exponential diff --git a/proposals/android-support.md b/proposals/android-support.md new file mode 100644 index 0000000..0b8419d --- /dev/null +++ b/proposals/android-support.md @@ -0,0 +1,255 @@ +# Proposal: Android support for the Patch SDK + +**Status:** Draft for discussion +**Author:** Gregorio Torrezan +**Date:** 2026-10-11 + +## Summary + +Swift now builds for Android with an official toolchain (the Swift SDK for +Android from the swift.org Android workgroup) and with tools like +[Skip](https://skip.tools). Teams that share Swift code between iOS and Android +have no over-the-air update option for the Android side. Flutter has Shorebird +and React Native has CodePush / EAS Update; Swift on Android has nothing. + +Patch is well placed to fill that gap. Its update unit is a WebAssembly module, +which doesn't depend on the platform. The same `.wasm` file, backend, dashboard, +channels and rollouts could serve both stores. What's missing is an SDK that +compiles and runs on Android. + +I built a prototype on a fork to find out how far the SDK is from building for +Android. The compression and crypto dependencies are solved, and several +targets already build. The rest is mostly structural: deciding where the +Apple-only host bridges live and what they do on Android. Those are product +decisions, so this document lays out the options rather than picking one. + +## Why do this + +1. **New market with no competitor.** Every Swift-on-Android app is a possible + customer, and nobody offers OTA updates for them. The pitch stays "this + patches **Swift**", now on both platforms. +2. **One release, two stores.** A customer fixes a bug in shared Swift code and + ships one patch to iOS and Android users, with the same rollout controls, + rollback and analytics. +3. **Most of the stack is reused.** The backend, module format, signing and + hashing, diffs (BSDIFF40), channels and the dashboard need no changes. The + SDK core (WasmKit runtime, marshalling, loader, update lifecycle) is mostly + plain Swift. +4. **Policy precedent exists.** Google Play's Device and Network Abuse policy + forbids downloading executable code (dex, JAR, `.so`) but exempts "code that + runs in a virtual machine or an interpreter where either provides indirect + access to Android APIs". CodePush and Shorebird rely on this exemption, and + a WebAssembly interpreter is the same model. *This needs legal review before + we make any public claim.* +5. **Better engineering on iOS too.** A hard line between the + platform-neutral core and platform bridges makes the core easier to test on + Linux CI and keeps Apple-framework code from leaking into it. + +## Current state (prototype findings) + +Prototype setup: Swift 6.4.0 with `swift-6.4.0-RELEASE_android`, Android NDK 27, +Skip 1.9.10, target `aarch64-unknown-linux-android28`. The full macOS test suite +still passes with the prototype changes (1031 tests, 0 failures) and the iOS +Simulator build succeeds. + +### Build status on Android + +On the `android-prototype` branch, **every target in the package and the full +test bundle build and link for Android** (`swift build --swift-sdk +aarch64-unknown-linux-android28 --build-tests`, and `skip android build`). +Nothing has *run* on an Android device or emulator yet. + +| Target | Builds for Android | Notes | +| --- | --- | --- | +| `PatchViewIR` | Yes | Plain Foundation `Codable` types | +| `PatchHostBridge` (with WasmKit) | Yes | The WASM interpreter itself compiles for Android | +| `CBrotliDec` (new) | Yes | See dependency changes below | +| `CBZ2` (vendored) | Yes | See dependency changes below | +| `PatchSDK` | Yes | Apple-only bridges are not registered on Android, see below | +| `PatchRender`, `PatchRenderUIKit`, `PatchSwiftUI`, `PatchUIKit` | Yes, but empty | SwiftUI/UIKit code is guarded out, so there is no renderer on Android yet | +| `PatchSDKTests` | Yes | Tests of Apple-only code use the same guards as that code | + +### Dependencies replaced in the prototype + +Each one is the reference or vendor-maintained implementation, not a +single-maintainer library. + +| Apple-only dependency | Used for | Replacement | Licence | +| --- | --- | --- | --- | +| `Compression` (`COMPRESSION_BROTLI`) | Inflating `.wasm.br` modules | Google's reference Brotli decoder (v1.2.0), vendored as `CBrotliDec`, decoder only | MIT | +| System `libbz2` (not in the Android NDK) | Inflating BSDIFF40 diff blocks | Reference libbzip2 1.0.8 from sourceware.org, vendored as `CBZ2`. It's the same library Apple ships | BSD-style | +| `CryptoKit` | SHA-256 module verification | Apple's [`swift-crypto`](https://github.com/apple/swift-crypto), same API, linked **only** on non-Apple platforms | Apache-2.0 | +| `URLSession` in Foundation | HTTP | `FoundationNetworking` on Android (conditional import) | — | + +None of these change behaviour on iOS. The Brotli decoder now also rejects +truncated streams and trailing bytes, and there are tests for both. + +### Small portability fixes in the prototype + +- `AnalyticsBridge`: CoreFoundation number type checks guarded, with a + portable fallback. +- `UpdateState`: `ObservableObject` / `@Published` (Combine) only where + Combine exists. +- `ProcessInfoBridge`: thermal state / low-power mode report neutral values + off Apple platforms. +- `ResourceOverlayRedirect`: ObjC swizzles skipped without the ObjC runtime. +- `HandoffBridge`: does nothing off Apple platforms. +- `KeychainBridge` and `relative_date_format`: **not registered** on Android. + There's no `Security` framework, and Foundation on Android has no + `RelativeDateTimeFormatter`. A no-op keychain would silently drop or expose + secrets; the right replacement (Android Keystore) needs real Android code. + +### What the Android build has today + +- 67 source files in `PatchSDK`, 48 of them host bridges. 38 import Apple-only + frameworks (UIKit, AVFoundation, StoreKit, EventKit, CoreLocation, + LocalAuthentication, Speech, CoreNFC, CoreMotion, Contacts, …). All of + those are guarded out on Android, so an Android build gets the core runtime + plus only the platform-neutral bridges. +- The SDK already follows a "cross-platform core + injected native dependency" + pattern (see `LocationBridge`). Real Android bridges plug into that, so the + work is filling it in rather than rewriting. + +Still open: running the tests on an emulator; deciding which bridges get +native Android implementations; the package structure (below). + +## Decision 1: package structure + +### Option A — Split into `PatchCore` + platform packages (recommended) + +``` +PatchViewIR portable IR (exists) +PatchHostBridge portable generic bridge runtime (exists) +PatchCore runtime, loader, update lifecycle, diff/brotli, SHA-256, + HTTP, analytics, platform-neutral bridges +PatchApple Apple bridges (UIKit, AVFoundation, StoreKit, Keychain, …) +PatchAndroid Android bridges (Keystore, location, haptics, …) +PatchUI renderers: SwiftUI / UIKit today, Compose later +PatchSDK umbrella product that re-exports Core + the right platform + package, so existing iOS integrations keep working +``` + +- **Pros:** clear boundaries; `PatchCore` testable on Linux CI; Android work + can't regress iOS; every bridge shows plainly which platform it serves. +- **Cons:** largest refactor; public module names change (an umbrella + `PatchSDK` product limits the damage); `BridgeRegistry` registration has + to become pluggable per platform. + +### Option B — One package, `#if` guards everywhere + +Keep the current layout and finish guarding each Apple-only bridge. + +- **Pros:** smallest diff; no change to the public API. +- **Cons:** platform code stays mixed into the core; each new bridge is a new + chance to break Android; harder to tell which bridges an Android customer + actually gets. + +### Option C — Option B now, Option A later + +Use guards to get a working Android build soon, then split once there's real +demand. + +- **Pros:** fastest proof on a real device; the split can wait for + customer feedback. +- **Cons:** the refactor still has to happen later, after more code exists. + +## Decision 2: what Apple-only bridges do on Android + +Every bridge needs a decision, but most will fall into the same buckets. + +| Strategy | What the guest sees | Good for | +| --- | --- | --- | +| **Not registered** | The import is missing, so WasmKit fails to instantiate the **whole module** (`WASMRuntime.swift`) and `FallbackManager` falls back to the previous module or native code. Never wrong, but coarse: one call to an unregistered bridge rejects the entire patch on Android | Features with no Android equivalent (Handoff, WatchConnectivity, Spotlight) and anything not yet ported | +| **Portable implementation** | Same behaviour as iOS | Things Swift / Foundation already cover. For example, `SecureRandomBridge` can use `SystemRandomNumberGenerator` (cryptographically secure everywhere) instead of `Security` | +| **Native Android implementation** | Same contract, Android-backed | High-value bridges: secure storage (Android Keystore), location, haptics, open URL, share sheet, biometrics, in-app review | +| **"Unavailable" stub** | Defined error / sentinel value | Only where the bridge contract already has an "unavailable" result (for example, location returns `0` when denied) | + +How to call Android APIs from Swift: + +- [**swift-java**](https://github.com/swiftlang/swift-java) — official + swiftlang project for Swift ↔ Java/JNI interop. +- **Skip** — its Fuse mode bridges Swift and Kotlin and already powers + Swift-on-Android apps. +- **Raw JNI / NDK C APIs** — no dependencies, but the most code to maintain. + +Recommendation: ship **"not registered"** as the default (safe: no fake +successes), make the cheap portable fixes, and port the top 5–10 bridges +natively based on what customers actually use. Because one missing import +rejects the whole module, the engine should eventually know which bridges each +platform provides. It could then warn at build time, or emit per-platform +modules, instead of the SDK rejecting the patch at load time. + +## Decision 3: UI rendering on Android + +`PatchViewIR` already builds for Android. It's the schema the engine emits +for patched views. The renderers are Apple-only. + +1. **No patched UI on Android at first.** Ship logic-only patching; views + always render natively. Lowest risk, still useful (pricing, feature + flags, business rules, networking). +2. **A Compose renderer for `PatchViewIR`** (Kotlin, or Swift through Skip). + Same IR, different backend. Gives real UI patching on Android. +3. **Reuse the SwiftUI renderer through Skip**, whose SwiftUI layer renders + to Jetpack Compose. Possibly the least code, but it ties the product to + Skip. + +Recommendation: ship option 1 first and evaluate options 2 and 3 separately. + +## Other work outside the SDK + +- **Engine / `patchcli`:** partitioning and the host-bridge resolver thunks + are generated for the app's native binary. On Android they need building + with the Android Swift SDK and wiring into a Gradle build. This needs its + own scoping. +- **Backend:** no change to the module format. We may need a `platform` + field on update checks, so a release can target iOS only, Android only, or + both. +- **CI:** add an Android cross-compile job (`swift build --swift-sdk + aarch64-unknown-linux-android28`) so the core can't regress, and an + emulator run of the WasmKit test fixtures. + +## Risks and open questions + +| Risk / question | Notes | +| --- | --- | +| Google Play policy | The interpreter exemption looks like a clear fit, but needs legal sign-off | +| Positioning | The README says "Not a cross-platform runtime". This doesn't change that: it's still native Swift. But marketing should frame it as "Swift, wherever Swift runs" | +| WasmKit on Android | It compiles; nobody has measured runtime behaviour and performance on a real device yet | +| Ecosystem maturity | Swift on Android is new; customer demand needs validating before a large investment | +| Maintenance cost | Two platforms in the bridge test matrix; partly offset by the core split | +| Vendored C code | Brotli and bzip2 need tracking for security advisories. Each vendored folder has a README with the pinned version, commit and update steps | +| Binary size on Android | Not yet measured | + +## Proposed phases + +| Phase | Scope | Size | +| --- | --- | --- | +| 0 — Done (prototype) | Portable compression and crypto, portability guards; whole package + test bundle build for Android (Option C style) | — | +| 1 — Core on Android | Pick an option for Decision 1; CI job; test suite passes on an emulator | M | +| 2 — Logic patching on a device | Loader + runtime + update flow end to end in a sample Android app; "not registered" default for Apple-only bridges | M | +| 3 — Native Android bridges | Keystore, location, haptics, open URL, share, biometrics, picked by usage data | M–L | +| 4 — Engine + Gradle integration | `patchcli` support for Android projects | L | +| 5 — UI patching | Compose renderer for `PatchViewIR` (or the Skip route) | L | + +## Appendix: prototype changes + +All on the `android-prototype` branch of a fork, nothing upstream. + +- `Package.swift`: new `CBrotliDec` target; `CBZ2` switched from a system + library to a vendored target; `swift-crypto` added, conditional on + Android/Linux. +- `Sources/CBrotliDec/`, `Sources/CBZ2/`: vendored sources, upstream + `LICENSE`, and a `README.md` with provenance and update steps. +- `Brotli.swift`: rewritten on the Brotli streaming decoder API; same public + API. +- `SHA256.swift` and 2 test files: CryptoKit / Crypto conditional import. +- 9 source files and 12 test files: `FoundationNetworking` conditional import. +- `AnalyticsBridge`, `UpdateState`, `ProcessInfoBridge`, + `ResourceOverlayRedirect`, `HandoffBridge`, `Bridges.swift` (keychain, + `jsonGetBool`, `relative_date_format`): guards described above. +- Tests: those exercising Apple-only code (SwiftUI glue, CoreImage, PDF, + Combine) use the same guard as the code under test; `autoreleasepool` is + only used where the ObjC runtime exists. +- `DiffApplyTests`: three new Brotli failure-case tests. +- Verified: full macOS suite 1031 tests / 0 failures; iOS Simulator build + succeeds; Android build of all targets + tests succeeds. From 566ea8b7d7fca84775440fee787efb87d6975f26 Mon Sep 17 00:00:00 2001 From: Gregorio Torrezan Date: Fri, 16 Oct 2026 07:36:56 -0300 Subject: [PATCH 2/5] Pass the test suite on Android; copy file:// downloads directly `skip android test` on an Android 17 arm64 emulator: 771 tests, 0 failures, 6 skipped (the same skips as on macOS). FoundationNetworking on Android rejects file:// URLs with NSURLErrorUnsupportedURL, so FileDownloadBridge.syncDownload now copies local files directly off Apple platforms. Apple platforms keep using URLSession. HTTPS through URLSession was verified to work on the emulator. Update the Android proposal with the device results. Co-Authored-By: Claude Opus 5.5 --- Sources/PatchSDK/FileDownloadBridge.swift | 10 +++++++ proposals/android-support.md | 32 ++++++++++++++++++----- 2 files changed, 36 insertions(+), 6 deletions(-) diff --git a/Sources/PatchSDK/FileDownloadBridge.swift b/Sources/PatchSDK/FileDownloadBridge.swift index dc0a1eb..56f01f6 100644 --- a/Sources/PatchSDK/FileDownloadBridge.swift +++ b/Sources/PatchSDK/FileDownloadBridge.swift @@ -92,6 +92,16 @@ public struct FileDownloadBridge: Bridge { let box = PathBox() let dest = destinationDirectory.appendingPathComponent(destinationName(for: url)) + #if !canImport(Darwin) + // FoundationNetworking off Darwin (Android) rejects `file://` URLs with + // NSURLErrorUnsupportedURL, so copy local files directly. Same result as + // the URLSession path on Apple platforms: the file lands at `dest`. + if url.isFileURL { + try? fm.removeItem(at: dest) + return (try? fm.copyItem(at: url, to: dest)) != nil ? dest.path : nil + } + #endif + let task = session.downloadTask(with: url) { tempURL, response, _ in defer { sem.signal() } guard let tempURL else { return } diff --git a/proposals/android-support.md b/proposals/android-support.md index 0b8419d..7bc4582 100644 --- a/proposals/android-support.md +++ b/proposals/android-support.md @@ -57,7 +57,25 @@ Simulator build succeeds. On the `android-prototype` branch, **every target in the package and the full test bundle build and link for Android** (`swift build --swift-sdk aarch64-unknown-linux-android28 --build-tests`, and `skip android build`). -Nothing has *run* on an Android device or emulator yet. + +**The test suite passes on an Android emulator** (`skip android test`, Android +17, arm64, 16 KB page size): **771 tests, 0 failures, 6 skipped**. The skips +are the same ones that skip on macOS: a fixture that isn't committed, and one +source-audit test. That covers the WasmKit interpreter running real +Swift-compiled guest modules, value marshalling, the module loader, Brotli and +BSDIFF40 diff application, SHA-256 verification, the update lifecycle and +fallback, and the platform-neutral bridges. The remaining ~260 tests of the +macOS suite exercise Apple-only code (SwiftUI/UIKit renderers, CoreImage, PDF) +and are compiled out on Android. + +Device findings: + +- **HTTPS works** through Foundation's `URLSession` (libcurl) on the emulator. + TLS and certificate validation needed no extra setup. +- **`file://` URLs are not supported** by `URLSession` on Android + (`NSURLErrorUnsupportedURL`). `FileDownloadBridge` now copies local files + directly off Apple platforms. Any other code that loads `file://` URLs + through `URLSession` will need the same treatment. | Target | Builds for Android | Notes | | --- | --- | --- | @@ -110,7 +128,8 @@ truncated streams and trailing bytes, and there are tests for both. pattern (see `LocationBridge`). Real Android bridges plug into that, so the work is filling it in rather than rewriting. -Still open: running the tests on an emulator; deciding which bridges get +Still open: a real Android app integration (not just the test runner); +performance and binary size on a physical device; deciding which bridges get native Android implementations; the package structure (below). ## Decision 1: package structure @@ -214,7 +233,7 @@ Recommendation: ship option 1 first and evaluate options 2 and 3 separately. | --- | --- | | Google Play policy | The interpreter exemption looks like a clear fit, but needs legal sign-off | | Positioning | The README says "Not a cross-platform runtime". This doesn't change that: it's still native Swift. But marketing should frame it as "Swift, wherever Swift runs" | -| WasmKit on Android | It compiles; nobody has measured runtime behaviour and performance on a real device yet | +| WasmKit on Android | Runs correctly on an arm64 emulator (full runtime test suite passes); performance on a physical device is not yet measured | | Ecosystem maturity | Swift on Android is new; customer demand needs validating before a large investment | | Maintenance cost | Two platforms in the bridge test matrix; partly offset by the core split | | Vendored C code | Brotli and bzip2 need tracking for security advisories. Each vendored folder has a README with the pinned version, commit and update steps | @@ -224,8 +243,8 @@ Recommendation: ship option 1 first and evaluate options 2 and 3 separately. | Phase | Scope | Size | | --- | --- | --- | -| 0 — Done (prototype) | Portable compression and crypto, portability guards; whole package + test bundle build for Android (Option C style) | — | -| 1 — Core on Android | Pick an option for Decision 1; CI job; test suite passes on an emulator | M | +| 0 — Done (prototype) | Portable compression and crypto, portability guards; whole package builds for Android and the test suite passes on an emulator (Option C style) | — | +| 1 — Core on Android | Pick an option for Decision 1; CI job running `skip android test` | S–M | | 2 — Logic patching on a device | Loader + runtime + update flow end to end in a sample Android app; "not registered" default for Apple-only bridges | M | | 3 — Native Android bridges | Keystore, location, haptics, open URL, share, biometrics, picked by usage data | M–L | | 4 — Engine + Gradle integration | `patchcli` support for Android projects | L | @@ -251,5 +270,6 @@ All on the `android-prototype` branch of a fork, nothing upstream. Combine) use the same guard as the code under test; `autoreleasepool` is only used where the ObjC runtime exists. - `DiffApplyTests`: three new Brotli failure-case tests. +- `FileDownloadBridge`: copies `file://` URLs directly off Apple platforms. - Verified: full macOS suite 1031 tests / 0 failures; iOS Simulator build - succeeds; Android build of all targets + tests succeeds. + succeeds; Android emulator suite 771 tests / 0 failures. From 3fdf853e930974c19cd3fe1c4229fd20b2f59340 Mon Sep 17 00:00:00 2001 From: Gregorio Torrezan Date: Fri, 16 Oct 2026 07:43:15 -0300 Subject: [PATCH 3/5] CI: build and test on an Android emulator Add an `android` job that cross-compiles the package with the official Swift SDK for Android (6.4) and runs PatchSDKTests on an emulator via skiptools/swift-android-action, alongside the existing macOS + iOS job. Co-Authored-By: Claude Opus 5.5 --- .github/workflows/ci.yml | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml index d817a3a..f744d98 100644 --- a/.github/workflows/ci.yml +++ b/.github/workflows/ci.yml @@ -58,3 +58,26 @@ jobs: -destination 'generic/platform=iOS Simulator' \ CODE_SIGNING_ALLOWED=NO done + + # Android gate: cross-compile the package with the official Swift SDK for + # Android and run PatchSDKTests on an Android emulator. Apple-only bridges and + # renderers are #if canImport-gated out there, so this job guards the + # platform-neutral core (WasmKit runtime, loader, Brotli/BSDIFF40, SHA-256, + # update lifecycle) against regressions that only show up off Apple + # platforms. The action copies the test resource bundle (.wasm fixtures) to + # the emulator. Locally: `skip android test`. + android: + name: build + test (android) + runs-on: ubuntu-latest + + steps: + - name: Checkout + uses: actions/checkout@v4 + + - name: Build + test on Android emulator + uses: skiptools/swift-android-action@v2 + with: + # Pinned to the toolchain the Android port was verified with. + swift-version: "6.4" + # Ubuntu runners can run out of disk while installing the emulator. + free-disk-space: true From 09761b0fc0649b96fa4bd37ada74a0e5e0dd9666 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Greg=C3=B3rio=20Gevartosky=20Torrezan?= Date: Fri, 16 Oct 2026 09:57:48 -0300 Subject: [PATCH 4/5] CI: fix Swift 6.0 resolution and the Android toolchain download - Package.resolved: restore main's lockfile. The branch had pinned swift-crypto 5.0.0 and swift-asn1 1.7.3 (resolved with Swift 6.4), which need tools 6.1/6.2 and broke `swift build` on the macOS job's Swift 6.0.3. Left unpinned, SwiftPM picks versions compatible with the toolchain, as it already does for swift-nio/swift-log on main. - Android job: use swift-version "6.4.0". "6.4" maps to a download URL that does not exist (curl exit 22). Co-Authored-By: Claude Opus 5.5 --- .github/workflows/ci.yml | 5 +++-- Package.resolved | 14 +++++++------- Package.swift | 5 ++++- 3 files changed, 14 insertions(+), 10 deletions(-) diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml index f744d98..976b98b 100644 --- a/.github/workflows/ci.yml +++ b/.github/workflows/ci.yml @@ -77,7 +77,8 @@ jobs: - name: Build + test on Android emulator uses: skiptools/swift-android-action@v2 with: - # Pinned to the toolchain the Android port was verified with. - swift-version: "6.4" + # Pinned to the toolchain the Android port was verified with. Must be + # the full release name: "6.4" resolves to a non-existent download. + swift-version: "6.4.0" # Ubuntu runners can run out of disk while installing the emulator. free-disk-space: true diff --git a/Package.resolved b/Package.resolved index 2cba3b2..4d93628 100644 --- a/Package.resolved +++ b/Package.resolved @@ -1,5 +1,5 @@ { - "originHash" : "15e574de1e249c240346e35d63e692bfb180fc255f492c0ee12d65b587536e08", + "originHash" : "fe702c13cd87e5baff7ec482558b6983e1e403032440ec783a5d9af8557fd02d", "pins" : [ { "identity" : "swift-argument-parser", @@ -15,8 +15,8 @@ "kind" : "remoteSourceControl", "location" : "https://github.com/apple/swift-asn1.git", "state" : { - "revision" : "3b6410f7dee09eb33cdd26260c5fd47fda19b0e2", - "version" : "1.7.3" + "revision" : "9f542610331815e29cc3821d3b6f488db8715517", + "version" : "1.6.0" } }, { @@ -33,8 +33,8 @@ "kind" : "remoteSourceControl", "location" : "https://github.com/apple/swift-collections.git", "state" : { - "revision" : "3b69cedbaa49957e97c092ae400bb57602ef941f", - "version" : "1.7.2" + "revision" : "35a1edcb8ebd2bfe251d587f0b69e62af28f508c", + "version" : "1.7.3" } }, { @@ -42,8 +42,8 @@ "kind" : "remoteSourceControl", "location" : "https://github.com/apple/swift-crypto.git", "state" : { - "revision" : "a9d1d5ab8951ada40cafff8c8e2b551dfde4f390", - "version" : "5.0.0" + "revision" : "bb4ba815dab96d4edc1e0b86d7b9acf9ff973a84", + "version" : "4.3.1" } }, { diff --git a/Package.swift b/Package.swift index 01686fe..081e79e 100644 --- a/Package.swift +++ b/Package.swift @@ -78,7 +78,10 @@ let package = Package( // Apple's swift-crypto: the CryptoKit API for platforms without CryptoKit // (Android). Only linked on non-Apple platforms (see the `.when` conditions // below); Apple builds keep using the system CryptoKit, so it adds nothing - // to an iOS app. Wide range so it rarely conflicts with a consumer's pin. + // to an iOS app. Wide range so it rarely conflicts with a consumer's pin; + // SwiftPM skips releases whose tools-version is newer than the active + // toolchain (swift-crypto 4.4+ needs 6.1, 5.x needs 6.2), so Swift 6.0 + // consumers still resolve a compatible version. .package(url: "https://github.com/apple/swift-crypto.git", "3.0.0" ..< "6.0.0") ], targets: [ From 5a89f57b2c2d1ca223986aa9c2f5a3c02221d566 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Greg=C3=B3rio=20Gevartosky=20Torrezan?= Date: Fri, 16 Oct 2026 14:09:35 -0300 Subject: [PATCH 5/5] CI: copy the test resource bundle to the Android emulator Swift 6.4's swift-build backend names the test resource bundle `PatchSDK_PatchSDKTests.bundle`, while skiptools/swift-android-action only copies `*.resources`, so the first fixture-loading test hit "unable to find bundle named PatchSDK_PatchSDKTests". Pass the .bundle via the action's copy-files input. Co-Authored-By: Claude Opus 5.5 --- .github/workflows/ci.yml | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml index 976b98b..6f2a695 100644 --- a/.github/workflows/ci.yml +++ b/.github/workflows/ci.yml @@ -82,3 +82,9 @@ jobs: swift-version: "6.4.0" # Ubuntu runners can run out of disk while installing the emulator. free-disk-space: true + # Swift 6.4 (swift-build backend) names the test resource bundle + # `PatchSDK_PatchSDKTests.bundle`, but the action only copies + # `*.resources` to the emulator, so Bundle.module fatal-errors. Copy the + # .bundle too. `${BUILD_DIR}` is the action's own build-products + # variable: this value is pasted into its shell script verbatim. + copy-files: ${BUILD_DIR}/*.bundle