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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "courgette/crc.h"
#include <stdint.h>
#include <stddef.h>
#ifdef COURGETTE_USE_CRC_LIB
# include "zlib.h"
#else
extern "C" {
# include "third_party/lzma_sdk/7zCrc.h"
}
#endif
namespace courgette {
uint32_t CalculateCrc(const uint8_t* buffer, size_t size) {
uint32_t crc;
#ifdef COURGETTE_USE_CRC_LIB
// Calculate Crc by calling CRC method in zlib
crc = crc32(0, buffer, size);
#else
// Calculate Crc by calling CRC method in LZMA SDK
CrcGenerateTable();
crc = CrcCalc(buffer, size);
#endif
return ~crc;
}
} // namespace
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