tests/test-bsearch.c

   1 /* Test of bsearch() function.
   2    Copyright (C) 2024 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 <stdlib.h>
  21
  22 #include "macros.h"
  23
  24 /* Test the library, not the compiler+library.  */
  25 static void *
  26 lib_bsearch (void const *key, void const *base, size_t nel, size_t width,
  27              int (*compar) (void const *, void const *))
  28 {
  29   return bsearch (key, base, nel, width, compar);
  30 }
  31 static void *(*volatile volatile_bsearch) (void const *, void const *, size_t,
  32                                            size_t,
  33                                            int (*) (void const *, void const *))
  34   = lib_bsearch;
  35 #undef bsearch
  36 #define bsearch volatile_bsearch
  37
  38 static int
  39 cmp (const void *a, const void *b)
  40 {
  41   return 0;
  42 }
  43
  44 int
  45 main (void)
  46 {
  47   /* Test zero-length operations on NULL pointers, allowed by
  48      <https://www.open-std.org/jtc1/sc22/wg14/www/docs/n3322.pdf>.  */
  49   ASSERT (bsearch ("x", NULL, 0, 1, cmp) == NULL);
  50
  51   return test_exit_status;
  52 }