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_t UpdateCrc32(uint32_t initial, const void* buf, size_t len); 23 24 // Computes a CRC32 checksum using |len| bytes from |buf|. 25 inline uint32_t ComputeCrc32(const void* buf, size_t len) { 26 return UpdateCrc32(0, buf, len); 27 } 28 inline uint32_t 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_ 35
