tests/test-wmemmove.c

   1 /* Test of wmemmove() function.
   2    Copyright (C) 2024-2025 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 #include <config.h>
  18
  19 /* Specification.  */
  20 #include <wchar.h>
  21
  22 #include <stddef.h>
  23
  24 #include "macros.h"
  25
  26 /* Test the library, not the compiler+library.  */
  27 static wchar_t *
  28 lib_wmemmove (wchar_t *s1, wchar_t const *s2, size_t n)
  29 {
  30   return wmemmove (s1, s2, n);
  31 }
  32 static wchar_t *(*volatile volatile_wmemmove) (wchar_t *, wchar_t const *,
  33                                                size_t)
  34   = lib_wmemmove;
  35 #undef wmemmove
  36 #define wmemmove volatile_wmemmove
  37
  38 int
  39 main (void)
  40 {
  41   /* Test zero-length operations on NULL pointers, allowed by
  42      <https://www.open-std.org/jtc1/sc22/wg14/www/docs/n3322.pdf>.  */
  43
  44   ASSERT (wmemmove (NULL, L"x", 0) == NULL);
  45
  46   {
  47     wchar_t y[1];
  48     ASSERT (wmemmove (y, NULL, 0) == y);
  49   }
  50
  51   return test_exit_status;
  52 }