1  /* Test of <alignof.h>.
       2     Copyright (C) 2009-2023 Free Software Foundation, Inc.
       3  
       4     This program is free software: you can redistribute it and/or modify
       5     it under the terms of the GNU General Public License as published by
       6     the Free Software Foundation, either version 3 of the License, or
       7     (at your option) any later version.
       8  
       9     This program is distributed in the hope that it will be useful,
      10     but WITHOUT ANY WARRANTY; without even the implied warranty of
      11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      12     GNU General Public License for more details.
      13  
      14     You should have received a copy of the GNU General Public License
      15     along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
      16  
      17  /* Written by Bruno Haible <bruno@clisp.org>, 2009.  */
      18  
      19  #include <config.h>
      20  
      21  #include <alignof.h>
      22  
      23  #include <stddef.h>
      24  #include <stdint.h>
      25  
      26  typedef long double longdouble;
      27  typedef struct { char a[1]; } struct1;
      28  typedef struct { char a[2]; } struct2;
      29  typedef struct { char a[3]; } struct3;
      30  typedef struct { char a[4]; } struct4;
      31  
      32  #define CHECK(type) \
      33    typedef struct { char slot1; type slot2; } type##_helper; \
      34    static_assert (alignof_slot (type) == offsetof (type##_helper, slot2)); \
      35    const int type##_slot_alignment = alignof_slot (type); \
      36    const int type##_type_alignment = alignof_type (type);
      37  
      38  CHECK (char)
      39  CHECK (short)
      40  CHECK (int)
      41  CHECK (long)
      42  CHECK (float)
      43  CHECK (double)
      44  CHECK (longdouble)
      45  #ifdef INT64_MAX
      46  CHECK (int64_t)
      47  #endif
      48  CHECK (struct1)
      49  CHECK (struct2)
      50  CHECK (struct3)
      51  CHECK (struct4)
      52  
      53  int
      54  main ()
      55  {
      56    return 0;
      57  }