forked from mirrors/gecko-dev
534ac9e360
I opted to go with what I perceived as the more expedient route of leaving lz4 roughly where it is and just adding to that. The biggest complication was xxhash, which is included elsewhere. I'm not generally proficient with build-related things though so my solution may be wrong and not just ugly. Differential Revision: https://phabricator.services.mozilla.com/D30640 --HG-- rename : mfbt/lz4.c => mfbt/lz4/lz4.c rename : mfbt/lz4.h => mfbt/lz4/lz4.h extra : moz-landing-system : lando
80 lines
2.8 KiB
C++
80 lines
2.8 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/Compression.h"
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#include "mozilla/CheckedInt.h"
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// Without including <string>, MSVC 2015 complains about e.g. the impossibility
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// to convert `const void* const` to `void*` when calling memchr from
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// corecrt_memory.h.
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#include <string>
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#include "lz4/lz4.h"
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using namespace mozilla::Compression;
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/* Our wrappers */
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size_t LZ4::compress(const char* aSource, size_t aInputSize, char* aDest) {
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CheckedInt<int> inputSizeChecked = aInputSize;
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MOZ_ASSERT(inputSizeChecked.isValid());
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return LZ4_compress_default(aSource, aDest, inputSizeChecked.value(),
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LZ4_compressBound(inputSizeChecked.value()));
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}
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size_t LZ4::compressLimitedOutput(const char* aSource, size_t aInputSize,
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char* aDest, size_t aMaxOutputSize) {
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CheckedInt<int> inputSizeChecked = aInputSize;
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MOZ_ASSERT(inputSizeChecked.isValid());
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CheckedInt<int> maxOutputSizeChecked = aMaxOutputSize;
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MOZ_ASSERT(maxOutputSizeChecked.isValid());
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return LZ4_compress_default(aSource, aDest, inputSizeChecked.value(),
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maxOutputSizeChecked.value());
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}
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bool LZ4::decompress(const char* aSource, char* aDest, size_t aOutputSize) {
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CheckedInt<int> outputSizeChecked = aOutputSize;
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MOZ_ASSERT(outputSizeChecked.isValid());
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int ret = LZ4_decompress_fast(aSource, aDest, outputSizeChecked.value());
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return ret >= 0;
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}
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bool LZ4::decompress(const char* aSource, size_t aInputSize, char* aDest,
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size_t aMaxOutputSize, size_t* aOutputSize) {
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CheckedInt<int> maxOutputSizeChecked = aMaxOutputSize;
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MOZ_ASSERT(maxOutputSizeChecked.isValid());
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CheckedInt<int> inputSizeChecked = aInputSize;
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MOZ_ASSERT(inputSizeChecked.isValid());
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int ret = LZ4_decompress_safe(aSource, aDest, inputSizeChecked.value(),
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maxOutputSizeChecked.value());
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if (ret >= 0) {
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*aOutputSize = ret;
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return true;
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}
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*aOutputSize = 0;
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return false;
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}
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bool LZ4::decompressPartial(const char* aSource, size_t aInputSize, char* aDest,
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size_t aMaxOutputSize, size_t* aOutputSize) {
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CheckedInt<int> maxOutputSizeChecked = aMaxOutputSize;
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MOZ_ASSERT(maxOutputSizeChecked.isValid());
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CheckedInt<int> inputSizeChecked = aInputSize;
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MOZ_ASSERT(inputSizeChecked.isValid());
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int ret = LZ4_decompress_safe_partial(
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aSource, aDest, inputSizeChecked.value(), maxOutputSizeChecked.value(),
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maxOutputSizeChecked.value());
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if (ret >= 0) {
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*aOutputSize = ret;
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return true;
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}
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*aOutputSize = 0;
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return false;
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}
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