1  /* Test strncmp with size_t in the lower 32 bits of 64-bit register.
       2     Copyright (C) 2019-2023 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       4  
       5     The GNU C Library is free software; you can redistribute it and/or
       6     modify it under the terms of the GNU Lesser General Public
       7     License as published by the Free Software Foundation; either
       8     version 2.1 of the License, or (at your option) any later version.
       9  
      10     The GNU C Library is distributed in the hope that it will be useful,
      11     but WITHOUT ANY WARRANTY; without even the implied warranty of
      12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      13     Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library; if not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  #ifdef WIDE
      20  # define TEST_NAME "wcsncmp"
      21  #else
      22  # define TEST_NAME "strncmp"
      23  #endif
      24  
      25  #include "test-size_t.h"
      26  
      27  #ifdef WIDE
      28  # include <wchar.h>
      29  
      30  # define STRNCMP wcsncmp
      31  # define STRNCPY wcsncpy
      32  # define CHAR wchar_t
      33  #else
      34  # define STRNCMP strncmp
      35  # define STRNCPY strncpy
      36  # define CHAR char
      37  #endif
      38  
      39  IMPL (STRNCMP, 1)
      40  
      41  typedef int (*proto_t) (const CHAR *, const CHAR *, size_t);
      42  
      43  
      44  static int
      45  __attribute__ ((noinline, noclone))
      46  do_strncmp (parameter_t a, parameter_t b)
      47  {
      48    return CALL (&b, a.p, b.p, a.len);
      49  }
      50  
      51  static int
      52  test_main (void)
      53  {
      54    test_init ();
      55  
      56    size_t size = page_size / sizeof (CHAR);
      57    parameter_t dest = { { size }, buf1 };
      58    parameter_t src = { { 0 }, buf2 };
      59  
      60    STRNCPY ((CHAR *) buf1, (const CHAR *) buf2, size);
      61  
      62    int ret = 0;
      63    FOR_EACH_IMPL (impl, 0)
      64      {
      65        src.fn = impl->fn;
      66        int res = do_strncmp (dest, src);
      67        if (res)
      68  	{
      69  	  error (0, 0, "Wrong result in function %s: %i != 0",
      70  		 impl->name, res);
      71  	  ret = 1;
      72  	}
      73      }
      74  
      75    return ret ? EXIT_FAILURE : EXIT_SUCCESS;
      76  }
      77  
      78  #include <support/test-driver.c>