LCOV - code coverage report
Current view: top level - common - stdclamp.h (source / functions) Hit Total Coverage
Test: Test Coverage for xapian-core 2463e5ebed6d Lines: 4 4 100.0 %
Date: 2019-03-18 07:48:51 Functions: 2 2 100.0 %
Branches: 3 6 50.0 %

           Branch data     Line data    Source code
       1                 :            : /** @file stdclamp.h
       2                 :            :  * @brief Defines STD_CLAMP like C++17's std::clamp
       3                 :            :  */
       4                 :            : /* Copyright (C) 2017 Olly Betts
       5                 :            :  *
       6                 :            :  * This program is free software; you can redistribute it and/or modify
       7                 :            :  * it under the terms of the GNU General Public License as published by
       8                 :            :  * the Free Software Foundation; either version 2 of the License, or
       9                 :            :  * (at your option) any later version.
      10                 :            :  *
      11                 :            :  * This program is distributed in the hope that it will be useful,
      12                 :            :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      13                 :            :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      14                 :            :  * GNU General Public License for more details.
      15                 :            :  *
      16                 :            :  * You should have received a copy of the GNU General Public License
      17                 :            :  * along with this program; if not, write to the Free Software
      18                 :            :  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
      19                 :            :  */
      20                 :            : 
      21                 :            : #ifndef XAPIAN_INCLUDED_STDCLAMP_H
      22                 :            : #define XAPIAN_INCLUDED_STDCLAMP_H
      23                 :            : 
      24                 :            : #include <algorithm>
      25                 :            : 
      26                 :            : #if __cplusplus >= 201703L
      27                 :            : # define STD_CLAMP std::clamp
      28                 :            : #else
      29                 :            : template<typename T, typename CMP>
      30                 :            : constexpr const T&
      31                 :       1559 : STD_CLAMP(const T& value, const T& lower, const T& upper, CMP cmp)
      32                 :            : {
      33 [ -  + ][ -  + ]:       1559 :     return cmp(value, lower) ? lower : (cmp(upper, value) ? upper : value);
      34                 :            : }
      35                 :            : 
      36                 :            : template<typename T>
      37                 :            : constexpr const T&
      38                 :       1559 : STD_CLAMP(const T& value, const T& lower, const T& upper)
      39                 :            : {
      40         [ +  - ]:       1559 :     return STD_CLAMP(value, lower, upper, std::less<T>());
      41                 :            : }
      42                 :            : #endif
      43                 :            : 
      44                 :            : #endif // XAPIAN_INCLUDED_STDCLAMP_H

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