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

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• Hash : bb051a0a
  Author :
  Date : 2009-05-14T01:39:07
  

  Make some tests ISO C 99 compliant.
  

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• tests/test-memcmp.c

• /*
   * Copyright (C) 2008-2009 Free Software Foundation
   * Written by Simon Josefsson
   *
   * 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 <http://www.gnu.org/licenses/>.  */
  
  #include <config.h>
  
  #include <string.h>
  
  #include <stdio.h>
  #include <stdlib.h>
  
  #include "zerosize-ptr.h"
  
  #define ASSERT(expr) \
    do									     \
      {									     \
        if (!(expr))							     \
  	{								     \
  	  fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
  	  fflush (stderr);						     \
  	  abort ();							     \
  	}								     \
      }									     \
    while (0)
  
  int
  main (void)
  {
    /* Test equal / not equal distinction.  */
    ASSERT (memcmp (zerosize_ptr (), zerosize_ptr (), 0) == 0);
    ASSERT (memcmp ("foo", "foobar", 2) == 0);
    ASSERT (memcmp ("foo", "foobar", 3) == 0);
    ASSERT (memcmp ("foo", "foobar", 4) != 0);
    ASSERT (memcmp ("foo", "bar", 1) != 0);
    ASSERT (memcmp ("foo", "bar", 3) != 0);
  
    /* Test less / equal / greater distinction.  */
    ASSERT (memcmp ("foo", "moo", 4) < 0);
    ASSERT (memcmp ("moo", "foo", 4) > 0);
    ASSERT (memcmp ("oomph", "oops", 3) < 0);
    ASSERT (memcmp ("oops", "oomph", 3) > 0);
    ASSERT (memcmp ("foo", "foobar", 4) < 0);
    ASSERT (memcmp ("foobar", "foo", 4) > 0);
  
    /* Some old versions of memcmp were not 8-bit clean.  */
    ASSERT (memcmp ("\100", "\201", 1) < 0);
    ASSERT (memcmp ("\201", "\100", 1) > 0);
    ASSERT (memcmp ("\200", "\201", 1) < 0);
    ASSERT (memcmp ("\201", "\200", 1) > 0);
  
    /* The Next x86 OpenStep bug shows up only when comparing 16 bytes
       or more and with at least one buffer not starting on a 4-byte boundary.
       William Lewis provided this test program.   */
    {
      char foo[21];
      char bar[21];
      int i;
      for (i = 0; i < 4; i++)
        {
  	char *a = foo + i;
  	char *b = bar + i;
  	strcpy (a, "--------01111111");
  	strcpy (b, "--------10000000");
  	ASSERT (memcmp (a, b, 16) < 0);
        }
    }
  
    return 0;
  }
  

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