Branch data    TLA  Line data    Source code

       1                 :                : // Copyright (c) 2025 xlnt-community
       2                 :                : //
       3                 :                : // Permission is hereby granted, free of charge, to any person obtaining a copy
       4                 :                : // of this software and associated documentation files (the "Software"), to deal
       5                 :                : // in the Software without restriction, including without limitation the rights
       6                 :                : // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
       7                 :                : // copies of the Software, and to permit persons to whom the Software is
       8                 :                : // furnished to do so, subject to the following conditions:
       9                 :                : //
      10                 :                : // The above copyright notice and this permission notice shall be included in
      11                 :                : // all copies or substantial portions of the Software.
      12                 :                : //
      13                 :                : // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
      14                 :                : // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
      15                 :                : // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
      16                 :                : // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
      17                 :                : // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
      18                 :                : // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
      19                 :                : // THE SOFTWARE
      20                 :                : //
      21                 :                : // @license: http://www.opensource.org/licenses/mit-license.php
      22                 :                : // @author: see AUTHORS file
      23                 :                : 
      24                 :                : #pragma once
      25                 :                : 
      26                 :                : #include <cstddef>
      27                 :                : #include <functional>
      28                 :                : 
      29                 :                : namespace xlnt {
      30                 :                : namespace detail {
      31                 :                : 
      32                 :                : /// <summary>
      33                 :                : /// A standard, robust way to combine hash values.
      34                 :                : /// Often credited to Boost's hash_combine.
      35                 :                : /// </summary>
      36                 :                : template <class T>
      37                 :CBC         906 : inline void hash_combine(std::size_t& seed, const T& v)
      38                 :                : {
      39                 :                :     std::hash<T> hasher;
      40            [ + ]:            906 :     seed ^= hasher(v) + 0x9e3779b9 + (seed << 6) + (seed >> 2);
      41                 :            906 : }
      42                 :                : 
      43                 :                : } // namespace detail
      44                 :                : } // namespace xlnt