/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* vim: set ts=8 sts=2 et sw=2 tw=80: */ /* This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ #include "mozilla/Compression.h" #include "mozilla/CheckedInt.h" // Without including <string>, MSVC 2015 complains about e.g. the impossibility // to convert `const void* const` to `void*` when calling memchr from // corecrt_memory.h. #include <string> using namespace mozilla::Compression; namespace { extern "C" { #include "lz4.c" } }/* anonymous namespace */ /* Our wrappers */ size_t LZ4::compress(const char* aSource, size_t aInputSize, char* aDest) { CheckedInt<int> inputSizeChecked = aInputSize; MOZ_ASSERT(inputSizeChecked.isValid()); return LZ4_compress_default(aSource, aDest, inputSizeChecked.value(), LZ4_compressBound(inputSizeChecked.value())); } size_t LZ4::compressLimitedOutput(const char* aSource, size_t aInputSize, char* aDest, size_t aMaxOutputSize) { CheckedInt<int> inputSizeChecked = aInputSize; MOZ_ASSERT(inputSizeChecked.isValid()); CheckedInt<int> maxOutputSizeChecked = aMaxOutputSize; MOZ_ASSERT(maxOutputSizeChecked.isValid()); return LZ4_compress_default(aSource, aDest, inputSizeChecked.value(), maxOutputSizeChecked.value()); } bool LZ4::decompress(const char* aSource, char* aDest, size_t aOutputSize) { CheckedInt<int> outputSizeChecked = aOutputSize; MOZ_ASSERT(outputSizeChecked.isValid()); int ret = LZ4_decompress_fast(aSource, aDest, outputSizeChecked.value()); return ret >= 0; } bool LZ4::decompress(const char* aSource, size_t aInputSize, char* aDest, size_t aMaxOutputSize, size_t* aOutputSize) { CheckedInt<int> maxOutputSizeChecked = aMaxOutputSize; MOZ_ASSERT(maxOutputSizeChecked.isValid()); CheckedInt<int> inputSizeChecked = aInputSize; MOZ_ASSERT(inputSizeChecked.isValid()); int ret = LZ4_decompress_safe(aSource, aDest, inputSizeChecked.value(), maxOutputSizeChecked.value()); if (ret >= 0) { *aOutputSize = ret; return true; } *aOutputSize = 0; return false; }