/* * libjingle * Copyright 2012, Google, Inc. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * 3. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #ifndef TALK_BASE_CRC32_H_ #define TALK_BASE_CRC32_H_ #include <string> #include "talk/base/basictypes.h" namespace talk_base { // Updates a CRC32 checksum with |len| bytes from |buf|. |initial| holds the // checksum result from the previous update; for the first call, it should be 0. uint32 UpdateCrc32(uint32 initial, const void* buf, size_t len); // Computes a CRC32 checksum using |len| bytes from |buf|. inline uint32 ComputeCrc32(const void* buf, size_t len) { return UpdateCrc32(0, buf, len); } inline uint32 ComputeCrc32(const std::string& str) { return ComputeCrc32(str.c_str(), str.size()); } } // namespace talk_base #endif // TALK_BASE_CRC32_H_