michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "mozilla/Compression.h"
michael@0: #include "mozilla/CheckedInt.h"
michael@0: using namespace mozilla::Compression;
michael@0: 
michael@0: namespace {
michael@0: 
michael@0: #include "lz4.c"
michael@0: 
michael@0: }/* anonymous namespace */
michael@0: 
michael@0: /* Our wrappers */
michael@0: 
michael@0: size_t
michael@0: LZ4::compress(const char* source, size_t inputSize, char* dest)
michael@0: {
michael@0:     CheckedInt<int> inputSizeChecked = inputSize;
michael@0:     MOZ_ASSERT(inputSizeChecked.isValid());
michael@0:     return LZ4_compress(source, dest, inputSizeChecked.value());
michael@0: }
michael@0: 
michael@0: size_t
michael@0: LZ4::compressLimitedOutput(const char* source, size_t inputSize, char* dest, size_t maxOutputSize)
michael@0: {
michael@0:     CheckedInt<int> inputSizeChecked = inputSize;
michael@0:     MOZ_ASSERT(inputSizeChecked.isValid());
michael@0:     CheckedInt<int> maxOutputSizeChecked = maxOutputSize;
michael@0:     MOZ_ASSERT(maxOutputSizeChecked.isValid());
michael@0:     return LZ4_compress_limitedOutput(source, dest, inputSizeChecked.value(),
michael@0:                                       maxOutputSizeChecked.value());
michael@0: }
michael@0: 
michael@0: bool
michael@0: LZ4::decompress(const char* source, char* dest, size_t outputSize)
michael@0: {
michael@0:     CheckedInt<int> outputSizeChecked = outputSize;
michael@0:     MOZ_ASSERT(outputSizeChecked.isValid());
michael@0:     int ret = LZ4_decompress_fast(source, dest, outputSizeChecked.value());
michael@0:     return ret >= 0;
michael@0: }
michael@0: 
michael@0: bool
michael@0: LZ4::decompress(const char* source, size_t inputSize, char* dest, size_t maxOutputSize,
michael@0:                 size_t *outputSize)
michael@0: {
michael@0:     CheckedInt<int> maxOutputSizeChecked = maxOutputSize;
michael@0:     MOZ_ASSERT(maxOutputSizeChecked.isValid());
michael@0:     CheckedInt<int> inputSizeChecked = inputSize;
michael@0:     MOZ_ASSERT(inputSizeChecked.isValid());
michael@0: 
michael@0:     int ret = LZ4_decompress_safe(source, dest, inputSizeChecked.value(),
michael@0:                                   maxOutputSizeChecked.value());
michael@0:     if (ret >= 0) {
michael@0:         *outputSize = ret;
michael@0:         return true;
michael@0:     } else {
michael@0:         *outputSize = 0;
michael@0:         return false;
michael@0:     }
michael@0: }
michael@0: