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69 lines
2.0 KiB
C++
69 lines
2.0 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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using namespace mozilla::Compression;
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namespace {
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#include "lz4.c"
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}/* anonymous namespace */
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/* Our wrappers */
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size_t
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LZ4::compress(const char* aSource, size_t aInputSize, char* aDest)
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{
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CheckedInt<int> inputSizeChecked = aInputSize;
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MOZ_ASSERT(inputSizeChecked.isValid());
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return LZ4_compress(aSource, aDest, inputSizeChecked.value());
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}
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size_t
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LZ4::compressLimitedOutput(const char* aSource, size_t aInputSize, char* aDest,
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size_t aMaxOutputSize)
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{
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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_limitedOutput(aSource, aDest, inputSizeChecked.value(),
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maxOutputSizeChecked.value());
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}
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bool
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LZ4::decompress(const char* aSource, char* aDest, size_t aOutputSize)
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{
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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
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LZ4::decompress(const char* aSource, size_t aInputSize, char* aDest,
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size_t aMaxOutputSize, size_t* aOutputSize)
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{
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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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