| // Copyright 2011 The Chromium Authors |
| // 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/C/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 |
