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1 /* | |
2 * Copyright 2012 Google Inc. | |
3 * | |
4 * Use of this source code is governed by a BSD-style license that can be | |
5 * found in the LICENSE file. | |
6 */ | |
7 | |
8 /** | |
9 * Hash functions, using the CityHash algorithm. | |
10 * | |
11 * Results are guaranteed to be: | |
12 * 1. consistent across revisions of the library (for a given set | |
13 * of bytes, the checksum generated at one revision of the Skia | |
14 * library will match the one generated on any other revision of | |
15 * the Skia library) | |
16 * 2. consistent across platforms (for a given | |
17 * set of bytes, the checksum generated on one platform will | |
18 * match the one generated on any other platform) | |
19 */ | |
20 | |
21 #ifndef SkCityHash_DEFINED | |
22 #define SkCityHash_DEFINED | |
23 | |
24 #include "SkTypes.h" | |
25 | |
26 class SkCityHash : SkNoncopyable { | |
27 public: | |
28 /** | |
29 * Compute a 32-bit checksum for a given data block. | |
30 * | |
31 * @param data Memory address of the data block to be processed. | |
32 * @param size Size of the data block in bytes. | |
33 * @return checksum result | |
34 */ | |
35 static uint32_t Compute32(const char *data, size_t size); | |
36 | |
37 /** | |
38 * Compute a 64-bit checksum for a given data block. | |
39 * | |
40 * @param data Memory address of the data block to be processed. | |
41 * @param size Size of the data block in bytes. | |
42 * @return checksum result | |
43 */ | |
44 static uint64_t Compute64(const char *data, size_t size); | |
45 }; | |
46 | |
47 #endif | |
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