1 // Copyright 2014 Google LLC
2 //
3 // Redistribution and use in source and binary forms, with or without
4 // modification, are permitted provided that the following conditions are
5 // met:
6 //
7 // * Redistributions of source code must retain the above copyright
8 // notice, this list of conditions and the following disclaimer.
9 // * Redistributions in binary form must reproduce the above
10 // copyright notice, this list of conditions and the following disclaimer
11 // in the documentation and/or other materials provided with the
12 // distribution.
13 // * Neither the name of Google LLC nor the names of its
14 // contributors may be used to endorse or promote products derived from
15 // this software without specific prior written permission.
16 //
17 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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22 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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27 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28
29 #ifndef COMMON_LINUX_CRC32_H_
30 #define COMMON_LINUX_CRC32_H_
31
32 #include <stdint.h>
33
34 #include <string>
35
36 namespace google_breakpad {
37
38 // Updates a CRC32 checksum with |len| bytes from |buf|. |initial| holds the
39 // checksum result from the previous update; for the first call, it should be 0.
40 uint32_t UpdateCrc32(uint32_t initial, const void* buf, size_t len);
41
42 // Computes a CRC32 checksum using |len| bytes from |buf|.
ComputeCrc32(const void * buf,size_t len)43 inline uint32_t ComputeCrc32(const void* buf, size_t len) {
44 return UpdateCrc32(0, buf, len);
45 }
ComputeCrc32(const std::string & str)46 inline uint32_t ComputeCrc32(const std::string& str) {
47 return ComputeCrc32(str.c_str(), str.size());
48 }
49
50 } // namespace google_breakpad
51
52 #endif // COMMON_LINUX_CRC32_H_
53