2 * Copyright (c) 2024 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 inline void HashStringView(const std::string_view& string, std::size_t& hash)
54 inline void HashStringView(const std::string_view& string, std::size_t& hash, char terminator)
62 hash = hash * 33 + static_cast<std::size_t>(c);
66 inline void HashBuffer(const std::vector<std::uint8_t>& buffer, std::size_t& hash)
68 for(const auto& c : buffer)
74 inline void HashBuffer(const Dali::Vector<std::uint8_t>& buffer, std::size_t& hash)
76 for(const auto& c : buffer)
82 } // unnamed namespace
84 std::size_t CalculateHash(const std::string& toHash)
86 std::size_t hash(INITIAL_HASH_VALUE);
88 HashString(toHash.c_str(), hash);
93 std::size_t CalculateHash(const std::string& toHash, char terminator)
95 std::size_t hash(INITIAL_HASH_VALUE);
97 HashString(toHash.c_str(), hash, terminator);
102 std::size_t CalculateHash(const std::string& string1, const std::string& string2)
104 std::size_t hash(INITIAL_HASH_VALUE);
106 HashString(string1.c_str(), hash);
107 HashString(string2.c_str(), hash);
112 std::size_t CalculateHash(const std::string_view& toHash)
114 std::size_t hash(INITIAL_HASH_VALUE);
116 HashStringView(toHash, hash);
121 std::size_t CalculateHash(const std::string_view& toHash, char terminator)
123 std::size_t hash(INITIAL_HASH_VALUE);
125 HashStringView(toHash, hash, terminator);
130 std::size_t CalculateHash(const std::string_view& string1, const std::string_view& string2)
132 std::size_t hash(INITIAL_HASH_VALUE);
134 HashStringView(string1, hash);
135 HashStringView(string2, hash);
140 std::size_t CalculateHash(const std::vector<std::uint8_t>& toHash)
142 std::size_t hash(INITIAL_HASH_VALUE);
144 HashBuffer(toHash, hash);
149 std::size_t CalculateHash(const Dali::Vector<std::uint8_t>& toHash)
151 std::size_t hash(INITIAL_HASH_VALUE);
153 HashBuffer(toHash, hash);