kc3-lang/gnulib/tests/test-memccpy.c

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• Hash : 15efa15b
  Author :
  Date : 2024-11-20T14:55:32
  

  tests: dissuade unwanted clang optimization
  
  Pacify Apple clang 14.0.0 (clang-1400.0.29.202) for
  arm64-apple-darwin21.6.0 on test-memset_explicit.c,
  which otherwise complains “warning: null passed to a callee that
  requires a non-null argument [-Wnonnull]” and presumably could
  do an unwanted optimization based on this analysis.
  Do other tests consistently.
  * tests/test-bsearch.c (lib_bsearch, volatile_bsearch, bsearch):
  * tests/test-memccpy.c (lib_memccpy, volatile_memccpy, memccpy):
  * tests/test-memchr.c (lib_memchr, volatile_memchr, memchr):
  * tests/test-memcmp.c (lib_memcmp, volatile_memcmp, memcmp):
  * tests/test-memcpy.c (lib_memcpy, volatile_memcpy, memcpy):
  * tests/test-memmove.c (lib_memmove, volatile_memmove, memmove):
  * tests/test-memset.c (lib_memset, volatile_memset, memset):
  * tests/test-memset_explicit.c (lib_memset_explicit)
  (volatile_memset_explicit, memset_explicit):
  * tests/test-qsort.c (lib_qsort, volatile_qsort, qsort):
  * tests/test-strncat.c (lib_strncat, volatile_strncat, strncat):
  * tests/test-strncmp.c (lib_strncmp, volatile_strncmp, strncmp):
  * tests/test-strncpy.c (lib_strncpy, volatile_strncpy, strncpy):
  * tests/test-strndup.c (lib_strndup, volatile_strndup, strndup):
  * tests/test-wcsncat.c (lib_wcsncat, volatile_wcsncat, wcsncat):
  * tests/test-wcsncmp.c (lib_wcsncmp, volatile_wcsncmp, wcsncmp):
  * tests/test-wcsncpy.c (lib_wcsncpy, volatile_wcsncpy, wcsncpy):
  * tests/test-wmemchr.c (lib_wmemchr, volatile_wmemchr, wmemchr):
  * tests/test-wmemcmp.c (lib_wmemcmp, volatile_wmemcmp, wmemcmp):
  * tests/test-wmemcpy.c (lib_wmemcpy, volatile_wmemcpy, wmemcpy):
  * tests/test-wmemmove.c (lib_wmemmove, volatile_wmemmove, wmemmove):
  * tests/test-wmemset.c (lib_wmemset, volatile_wmemset, wmemset)
  Convince the compiler to not optimize based on what it thinks
  about the function.  Callers changed to not use volatile locals,
  since they should no longer be needed.
  

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• tests/test-memccpy.c

• /* Test of memccpy() function.
     Copyright (C) 2024 Free Software Foundation, Inc.
  
     This program is free software: you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation, either version 3 of the License, or
     (at your option) any later version.
  
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
  
     You should have received a copy of the GNU General Public License
     along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  
  #include <config.h>
  
  /* Specification.  */
  #include <string.h>
  
  #include <stddef.h>
  
  #include "macros.h"
  
  /* Test the library, not the compiler+library.  */
  static void *
  lib_memccpy (void *dest, void const *src, int c, size_t n)
  {
    return memccpy (dest, src, c, n);
  }
  static void *(*volatile volatile_memccpy) (void *, void const *, int, size_t)
    = lib_memccpy;
  #undef memccpy
  #define memccpy volatile_memccpy
  
  int
  main (void)
  {
    /* Test zero-length operations on NULL pointers, allowed by
       <https://www.open-std.org/jtc1/sc22/wg14/www/docs/n3322.pdf>.  */
  
    ASSERT (memccpy (NULL, "x", '?', 0) == NULL);
  
    {
      char y[1];
      ASSERT (memccpy (y, NULL, '?', 0) == NULL);
    }
  
    return test_exit_status;
  }
  

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