| Torne (Richard Coles) | 5821806 | 2012-11-14 11:43:16 +0000 | [diff] [blame] | 1 | // Copyright (c) 2011 The Chromium Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #include "courgette/crc.h" |
| 6 | |
| 7 | #ifdef COURGETTE_USE_CRC_LIB |
| 8 | # include "zlib.h" |
| 9 | #else |
| 10 | extern "C" { |
| 11 | # include "third_party/lzma_sdk/7zCrc.h" |
| 12 | } |
| 13 | #endif |
| 14 | |
| 15 | #include "base/basictypes.h" |
| 16 | |
| 17 | namespace courgette { |
| 18 | |
| 19 | uint32 CalculateCrc(const uint8* buffer, size_t size) { |
| 20 | uint32 crc; |
| 21 | |
| 22 | #ifdef COURGETTE_USE_CRC_LIB |
| 23 | // Calculate Crc by calling CRC method in zlib |
| 24 | crc = crc32(0, buffer, size); |
| 25 | #else |
| 26 | // Calculate Crc by calling CRC method in LZMA SDK |
| 27 | CrcGenerateTable(); |
| 28 | crc = CrcCalc(buffer, size); |
| 29 | #endif |
| 30 | |
| 31 | return ~crc; |
| 32 | } |
| 33 | |
| 34 | } // namespace |