2 * Copyright (c) 2014 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/internal/common/dali-hash.h>
25 namespace //un-named namespace
28 * djb2 (http://www.cse.yorku.ca/~oz/hash.html)
30 const unsigned long INITIAL_HASH_VALUE = 5381;
32 inline void HashShader( const char* string, unsigned long& hash )
34 while( int c = *string++ )
39 } // un-named namespace
41 unsigned long CalculateHash(const std::string& toHash)
43 unsigned long hash = INITIAL_HASH_VALUE;
45 HashShader( toHash.c_str(), hash );
50 unsigned long CalculateHash(const std::string& string1, const std::string& string2)
52 unsigned long hash = INITIAL_HASH_VALUE;
54 HashShader( string1.c_str(), hash);
55 HashShader( string2.c_str(), hash );