2 * Copyright (c) 2020 Samsung Electronics Co., Ltd.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
19 #include <dali/devel-api/common/hash.h>
23 namespace //unnamed namespace
26 * djb2 (http://www.cse.yorku.ca/~oz/hash.html)
29 inline void HashString(const char* string, std::size_t& hash)
31 while(int c = *string++)
37 inline void HashString(const char* string, std::size_t& hash, char terminator)
40 while((c = *string++) && c != terminator)
46 } // unnamed namespace
48 std::size_t CalculateHash(const std::string& toHash)
50 std::size_t hash(INITIAL_HASH_VALUE);
52 HashString(toHash.c_str(), hash);
57 std::size_t CalculateHash(const std::string& toHash, char terminator)
59 std::size_t hash(INITIAL_HASH_VALUE);
61 HashString(toHash.c_str(), hash, terminator);
66 std::size_t CalculateHash(const std::string& string1, const std::string& string2)
68 std::size_t hash(INITIAL_HASH_VALUE);
70 HashString(string1.c_str(), hash);
71 HashString(string2.c_str(), hash);