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1 /* | 1 /* |
2 * Copyright 2012 The WebRTC Project Authors. All rights reserved. | 2 * Copyright 2012 The WebRTC Project Authors. All rights reserved. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license | 4 * Use of this source code is governed by a BSD-style license |
5 * that can be found in the LICENSE file in the root of the source | 5 * that can be found in the LICENSE file in the root of the source |
6 * tree. An additional intellectual property rights grant can be found | 6 * tree. An additional intellectual property rights grant can be found |
7 * in the file PATENTS. All contributing project authors may | 7 * in the file PATENTS. All contributing project authors may |
8 * be found in the AUTHORS file in the root of the source tree. | 8 * be found in the AUTHORS file in the root of the source tree. |
9 */ | 9 */ |
10 | 10 |
11 #ifndef WEBRTC_RTC_BASE_CRC32_H_ | 11 #ifndef WEBRTC_RTC_BASE_CRC32_H_ |
12 #define WEBRTC_RTC_BASE_CRC32_H_ | 12 #define WEBRTC_RTC_BASE_CRC32_H_ |
13 | 13 |
14 #include <string> | 14 #include <string> |
15 | 15 |
16 #include "webrtc/rtc_base/basictypes.h" | 16 #include "webrtc/base/basictypes.h" |
17 | 17 |
18 namespace rtc { | 18 namespace rtc { |
19 | 19 |
20 // Updates a CRC32 checksum with |len| bytes from |buf|. |initial| holds the | 20 // Updates a CRC32 checksum with |len| bytes from |buf|. |initial| holds the |
21 // checksum result from the previous update; for the first call, it should be 0. | 21 // checksum result from the previous update; for the first call, it should be 0. |
22 uint32_t UpdateCrc32(uint32_t initial, const void* buf, size_t len); | 22 uint32_t UpdateCrc32(uint32_t initial, const void* buf, size_t len); |
23 | 23 |
24 // Computes a CRC32 checksum using |len| bytes from |buf|. | 24 // Computes a CRC32 checksum using |len| bytes from |buf|. |
25 inline uint32_t ComputeCrc32(const void* buf, size_t len) { | 25 inline uint32_t ComputeCrc32(const void* buf, size_t len) { |
26 return UpdateCrc32(0, buf, len); | 26 return UpdateCrc32(0, buf, len); |
27 } | 27 } |
28 inline uint32_t ComputeCrc32(const std::string& str) { | 28 inline uint32_t ComputeCrc32(const std::string& str) { |
29 return ComputeCrc32(str.c_str(), str.size()); | 29 return ComputeCrc32(str.c_str(), str.size()); |
30 } | 30 } |
31 | 31 |
32 } // namespace rtc | 32 } // namespace rtc |
33 | 33 |
34 #endif // WEBRTC_RTC_BASE_CRC32_H_ | 34 #endif // WEBRTC_RTC_BASE_CRC32_H_ |
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