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
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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
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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|.
ComputeCrc32(const void * buf,size_t len)44 inline uint32_t ComputeCrc32(const void* buf, size_t len) {
45 return UpdateCrc32(0, buf, len);
46 }
ComputeCrc32(const std::string & str)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