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_ 39
