| henrike@webrtc.org | f7795df | 2014-05-13 18:00:26 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2012 The WebRTC Project Authors. All rights reserved. |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license |
| 5 | * that can be found in the LICENSE file in the root of the source |
| 6 | * tree. An additional intellectual property rights grant can be found |
| 7 | * in the file PATENTS. All contributing project authors may |
| 8 | * be found in the AUTHORS file in the root of the source tree. |
| 9 | */ |
| 10 | |
| 11 | #ifndef WEBRTC_BASE_CRC32_H_ |
| 12 | #define WEBRTC_BASE_CRC32_H_ |
| 13 | |
| 14 | #include <string> |
| 15 | |
| 16 | #include "webrtc/base/basictypes.h" |
| 17 | |
| 18 | namespace rtc { |
| 19 | |
| 20 | // Updates a CRC32 checksum with |len| bytes from |buf|. |initial| holds the |
| 21 | // checksum result from the previous update; for the first call, it should be 0. |
| 22 | uint32 UpdateCrc32(uint32 initial, const void* buf, size_t len); |
| 23 | |
| 24 | // Computes a CRC32 checksum using |len| bytes from |buf|. |
| 25 | inline uint32 ComputeCrc32(const void* buf, size_t len) { |
| 26 | return UpdateCrc32(0, buf, len); |
| 27 | } |
| 28 | inline uint32 ComputeCrc32(const std::string& str) { |
| 29 | return ComputeCrc32(str.c_str(), str.size()); |
| 30 | } |
| 31 | |
| 32 | } // namespace rtc |
| 33 | |
| 34 | #endif // WEBRTC_BASE_CRC32_H_ |