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 RTC_BASE_CRC32_H_ 12 #define RTC_BASE_CRC32_H_ 13 14 #include <stddef.h> 15 #include <stdint.h> 16 17 #include <string> 18 19 namespace rtc { 20 21 // Updates a CRC32 checksum with |len| bytes from |buf|. |initial| holds the 22 // checksum result from the previous update; for the first call, it should be 0. 23 uint32_t UpdateCrc32(uint32_t initial, const void* buf, size_t len); 24 25 // Computes a CRC32 checksum using |len| bytes from |buf|. ComputeCrc32(const void * buf,size_t len)26inline uint32_t ComputeCrc32(const void* buf, size_t len) { 27 return UpdateCrc32(0, buf, len); 28 } ComputeCrc32(const std::string & str)29inline uint32_t ComputeCrc32(const std::string& str) { 30 return ComputeCrc32(str.c_str(), str.size()); 31 } 32 33 } // namespace rtc 34 35 #endif // RTC_BASE_CRC32_H_ 36