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 37 namespace 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. 41 uint32_t UpdateCrc32(uint32_t initial, const void* buf, size_t len); 42 43 // Computes a CRC32 checksum using |len| bytes from |buf|. 44 inline uint32_t ComputeCrc32(const void* buf, size_t len) { 45 return UpdateCrc32(0, buf, len); 46 } 47 inline 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