LCOV - code coverage report
Current view: top level - common - alignment_cast.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: 6 6 100.0 %
Branches: 0 0 -

           Branch data     Line data    Source code
       1                 :            : /** @file alignment_cast.h
       2                 :            :  * @brief Cast a pointer we know is suitably aligned
       3                 :            :  */
       4                 :            : /* Copyright (C) 2016 Olly Betts
       5                 :            :  *
       6                 :            :  * Permission is hereby granted, free of charge, to any person obtaining a copy
       7                 :            :  * of this software and associated documentation files (the "Software"), to
       8                 :            :  * deal in the Software without restriction, including without limitation the
       9                 :            :  * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
      10                 :            :  * sell copies of the Software, and to permit persons to whom the Software is
      11                 :            :  * furnished to do so, subject to the following conditions:
      12                 :            :  *
      13                 :            :  * The above copyright notice and this permission notice shall be included in
      14                 :            :  * all copies or substantial portions of the Software.
      15                 :            :  *
      16                 :            :  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
      17                 :            :  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
      18                 :            :  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
      19                 :            :  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
      20                 :            :  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
      21                 :            :  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
      22                 :            :  * IN THE SOFTWARE.
      23                 :            :  */
      24                 :            : 
      25                 :            : #ifndef XAPIAN_INCLUDED_ALIGNMENT_CAST_H
      26                 :            : #define XAPIAN_INCLUDED_ALIGNMENT_CAST_H
      27                 :            : 
      28                 :            : #include <type_traits>
      29                 :            : 
      30                 :            : /** Cast a pointer we know is suitably aligned.
      31                 :            :  *
      32                 :            :  *  Has the same effect as reinterpret_cast<T> but avoids warnings about
      33                 :            :  *  alignment issues.
      34                 :            :  *
      35                 :            :  *  Version for const pointers.
      36                 :            :  */
      37                 :            : template<typename T, typename U>
      38                 :            : typename std::enable_if<std::is_const<typename std::remove_pointer<U>::type>::value, T>::type
      39                 :   34769537 : alignment_cast(U ptr)
      40                 :            : {
      41                 :   34769537 :     return static_cast<T>(static_cast<const void*>(ptr));
      42                 :            : }
      43                 :            : 
      44                 :            : /** Cast a pointer we know is suitably aligned.
      45                 :            :  *
      46                 :            :  *  Has the same effect as reinterpret_cast<T> but avoids warnings about
      47                 :            :  *  alignment issues.
      48                 :            :  *
      49                 :            :  *  Version for non-const pointers.
      50                 :            :  */
      51                 :            : template<typename T, typename U>
      52                 :            : typename std::enable_if<!std::is_const<typename std::remove_pointer<U>::type>::value, T>::type
      53                 :   63620050 : alignment_cast(U ptr)
      54                 :            : {
      55                 :   63620050 :     return static_cast<T>(static_cast<void*>(ptr));
      56                 :            : }
      57                 :            : 
      58                 :            : #endif /* XAPIAN_INCLUDED_ALIGNMENT_CAST_H */

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