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| 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #ifndef BASE_HASH_H_ | |
| 6 #define BASE_HASH_H_ | |
| 7 | |
| 8 #include <limits> | |
| 9 #include <string> | |
| 10 | |
| 11 #include "base/base_export.h" | |
| 12 #include "base/basictypes.h" | |
| 13 #include "base/logging.h" | |
| 14 | |
| 15 namespace base { | |
| 16 | |
| 17 // WARNING: This hash function should not be used for any cryptographic purpose. | |
| 18 BASE_EXPORT uint32 SuperFastHash(const char* data, int len); | |
| 19 | |
| 20 // Computes a hash of a memory buffer |data| of a given |length|. | |
| 21 // WARNING: This hash function should not be used for any cryptographic purpose. | |
| 22 inline uint32 Hash(const char* data, size_t length) { | |
| 23 if (length > static_cast<size_t>(std::numeric_limits<int>::max())) { | |
| 24 NOTREACHED(); | |
| 25 return 0; | |
| 26 } | |
| 27 return SuperFastHash(data, static_cast<int>(length)); | |
| 28 } | |
| 29 | |
| 30 // Computes a hash of a string |str|. | |
| 31 // WARNING: This hash function should not be used for any cryptographic purpose. | |
| 32 inline uint32 Hash(const std::string& str) { | |
| 33 return Hash(str.data(), str.size()); | |
| 34 } | |
| 35 | |
| 36 } // namespace base | |
| 37 | |
| 38 #endif // BASE_HASH_H_ | |
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