tests/test-alignof.c

   1 /* Test of <alignof.h>.
   2    Copyright (C) 2009-2017 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 <http://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 #include "verify.h"
  27
  28 typedef long double longdouble;
  29 typedef struct { char a[1]; } struct1;
  30 typedef struct { char a[2]; } struct2;
  31 typedef struct { char a[3]; } struct3;
  32 typedef struct { char a[4]; } struct4;
  33
  34 #define CHECK(type) \
  35   typedef struct { char slot1; type slot2; } type##_helper; \
  36   verify (alignof_slot (type) == offsetof (type##_helper, slot2)); \
  37   const int type##_slot_alignment = alignof_slot (type); \
  38   const int type##_type_alignment = alignof_type (type);
  39
  40 CHECK (char)
  41 CHECK (short)
  42 CHECK (int)
  43 CHECK (long)
  44 CHECK (float)
  45 CHECK (double)
  46 CHECK (longdouble)
  47 #ifdef INT64_MAX
  48 CHECK (int64_t)
  49 #endif
  50 CHECK (struct1)
  51 CHECK (struct2)
  52 CHECK (struct3)
  53 CHECK (struct4)
  54
  55 int
  56 main ()
  57 {
  58   return 0;
  59 }