Line data    Source code

       1             : /* Test of <stddef.h> substitute.
       2             :    Copyright (C) 2009-2020 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 Eric Blake <ebb9@byu.net>, 2009.  */
      18             : 
      19             : #include <config.h>
      20             : 
      21             : #include <stddef.h>
      22             : #include <limits.h>
      23             : #include <stdalign.h>
      24             : #include "verify.h"
      25             : 
      26             : /* Check that appropriate types are defined.  */
      27             : wchar_t a = 'c';
      28             : ptrdiff_t b = 1;
      29             : size_t c = 2;
      30             : max_align_t x;
      31             : 
      32             : /* Check that NULL can be passed through varargs as a pointer type,
      33             :    per POSIX 2008.  */
      34             : verify (sizeof NULL == sizeof (void *));
      35             : 
      36             : /* Check that offsetof produces integer constants with correct type.  */
      37             : struct d
      38             : {
      39             :   char e;
      40             :   char f;
      41             : };
      42             : /* Solaris 10 has a bug where offsetof is under-parenthesized, and
      43             :    cannot be used as an arbitrary expression.  However, since it is
      44             :    unlikely to bite real code, we ignore that short-coming.  */
      45             : /* verify (sizeof offsetof (struct d, e) == sizeof (size_t)); */
      46             : verify (sizeof (offsetof (struct d, e)) == sizeof (size_t));
      47             : verify (offsetof (struct d, f) == 1);
      48             : 
      49             : /* offsetof promotes to an unsigned integer if and only if sizes do
      50             :    not fit in int.  */
      51             : verify ((offsetof (struct d, e) < -1) == (INT_MAX < (size_t) -1));
      52             : 
      53             : /* Check max_align_t's alignment.  */
      54             : verify (alignof (double) <= alignof (max_align_t));
      55             : verify (alignof (int) <= alignof (max_align_t));
      56             : verify (alignof (long double) <= alignof (max_align_t));
      57             : verify (alignof (long int) <= alignof (max_align_t));
      58             : verify (alignof (ptrdiff_t) <= alignof (max_align_t));
      59             : verify (alignof (size_t) <= alignof (max_align_t));
      60             : verify (alignof (wchar_t) <= alignof (max_align_t));
      61             : verify (alignof (struct d) <= alignof (max_align_t));
      62             : #if defined __GNUC__ || defined __IBM__ALIGNOF__
      63             : verify (__alignof__ (double) <= __alignof__ (max_align_t));
      64             : verify (__alignof__ (int) <= __alignof__ (max_align_t));
      65             : verify (__alignof__ (long double) <= __alignof__ (max_align_t));
      66             : verify (__alignof__ (long int) <= __alignof__ (max_align_t));
      67             : verify (__alignof__ (ptrdiff_t) <= __alignof__ (max_align_t));
      68             : verify (__alignof__ (size_t) <= __alignof__ (max_align_t));
      69             : verify (__alignof__ (wchar_t) <= __alignof__ (max_align_t));
      70             : verify (__alignof__ (struct d) <= __alignof__ (max_align_t));
      71             : #endif
      72             : 
      73             : int
      74           1 : main (void)
      75             : {
      76           1 :   return 0;
      77             : }