1// Copyright 2014 Google Inc. 2// All rights reserved. 3// 4// Redistribution and use in source and binary forms, with or without 5// modification, are permitted provided that the following conditions are 6// met: 7// 8// * Redistributions of source code must retain the above copyright 9// notice, this list of conditions and the following disclaimer. 10// * Redistributions in binary form must reproduce the above 11// copyright notice, this list of conditions and the following disclaimer 12// in the documentation and/or other materials provided with the 13// distribution. 14// * Neither the name of Google Inc. nor the names of its 15// contributors may be used to endorse or promote products derived from 16// this software without specific prior written permission. 17// 18// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 30#ifndef COMMON_LINUX_CRC32_H_ 31#define COMMON_LINUX_CRC32_H_ 32 33#include <stdint.h> 34 35#include <string> 36 37namespace google_breakpad { 38 39// Updates a CRC32 checksum with |len| bytes from |buf|. |initial| holds the 40// checksum result from the previous update; for the first call, it should be 0. 41uint32_t UpdateCrc32(uint32_t initial, const void* buf, size_t len); 42 43// Computes a CRC32 checksum using |len| bytes from |buf|. 44inline uint32_t ComputeCrc32(const void* buf, size_t len) { 45 return UpdateCrc32(0, buf, len); 46} 47inline uint32_t ComputeCrc32(const std::string& str) { 48 return ComputeCrc32(str.c_str(), str.size()); 49} 50 51} // namespace google_breakpad 52 53#endif // COMMON_LINUX_CRC32_H_ 54