tests/test-memcasecmp.c

   1 /*
   2  * Copyright (C) 2008-2019 Free Software Foundation, Inc.
   3  * Written by Simon Josefsson and Bruno Haible
   4  *
   5  * This program is free software: you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 3 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program 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
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  17
  18 #include <config.h>
  19
  20 #include "memcasecmp.h"
  21
  22 #include <string.h>
  23
  24 #include "zerosize-ptr.h"
  25 #include "macros.h"
  26
  27 int
  28 main (void)
  29 {
  30   /* Test equal / not equal distinction.  */
  31   ASSERT (memcasecmp (zerosize_ptr (), zerosize_ptr (), 0) == 0);
  32   ASSERT (memcasecmp ("foo", "foobar", 2) == 0);
  33   ASSERT (memcasecmp ("foo", "foobar", 3) == 0);
  34   ASSERT (memcasecmp ("foo", "foobar", 4) != 0);
  35   ASSERT (memcasecmp ("foo", "bar", 1) != 0);
  36   ASSERT (memcasecmp ("foo", "bar", 3) != 0);
  37
  38   /* Test less / equal / greater distinction.  */
  39   ASSERT (memcasecmp ("foo", "moo", 4) < 0);
  40   ASSERT (memcasecmp ("moo", "foo", 4) > 0);
  41   ASSERT (memcasecmp ("oomph", "oops", 3) < 0);
  42   ASSERT (memcasecmp ("oops", "oomph", 3) > 0);
  43   ASSERT (memcasecmp ("foo", "foobar", 4) < 0);
  44   ASSERT (memcasecmp ("foobar", "foo", 4) > 0);
  45
  46   /* Test embedded NULs.  */
  47   ASSERT (memcasecmp ("1\0", "2\0", 2) < 0);
  48   ASSERT (memcasecmp ("2\0", "1\0", 2) > 0);
  49   ASSERT (memcasecmp ("x\0""1", "x\0""2", 3) < 0);
  50   ASSERT (memcasecmp ("x\0""2", "x\0""1", 3) > 0);
  51
  52   /* The Next x86 OpenStep bug shows up only when comparing 16 bytes
  53      or more and with at least one buffer not starting on a 4-byte boundary.
  54      William Lewis provided this test program.   */
  55   {
  56     char foo[21];
  57     char bar[21];
  58     int i;
  59     for (i = 0; i < 4; i++)
  60       {
  61         char *a = foo + i;
  62         char *b = bar + i;
  63         strcpy (a, "--------01111111");
  64         strcpy (b, "--------10000000");
  65         ASSERT (memcasecmp (a, b, 16) < 0);
  66       }
  67   }
  68
  69   return 0;
  70 }