1 /*
2 * Copyright (C) 2008-2021 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
main(void)28 main (void)
29 {
30 /* Test equal / not equal distinction. */
31 void *page_boundary1 = zerosize_ptr ();
32 void *page_boundary2 = zerosize_ptr ();
33 if (page_boundary1 && page_boundary2)
34 ASSERT (memcasecmp (page_boundary1, page_boundary2, 0) == 0);
35 ASSERT (memcasecmp ("foo", "foobar", 2) == 0);
36 ASSERT (memcasecmp ("foo", "foobar", 3) == 0);
37 ASSERT (memcasecmp ("foo", "foobar", 4) != 0);
38 ASSERT (memcasecmp ("foo", "bar", 1) != 0);
39 ASSERT (memcasecmp ("foo", "bar", 3) != 0);
40
41 /* Test less / equal / greater distinction. */
42 ASSERT (memcasecmp ("foo", "moo", 4) < 0);
43 ASSERT (memcasecmp ("moo", "foo", 4) > 0);
44 ASSERT (memcasecmp ("oomph", "oops", 3) < 0);
45 ASSERT (memcasecmp ("oops", "oomph", 3) > 0);
46 ASSERT (memcasecmp ("foo", "foobar", 4) < 0);
47 ASSERT (memcasecmp ("foobar", "foo", 4) > 0);
48
49 /* Test embedded NULs. */
50 ASSERT (memcasecmp ("1\0", "2\0", 2) < 0);
51 ASSERT (memcasecmp ("2\0", "1\0", 2) > 0);
52 ASSERT (memcasecmp ("x\0""1", "x\0""2", 3) < 0);
53 ASSERT (memcasecmp ("x\0""2", "x\0""1", 3) > 0);
54
55 /* The Next x86 OpenStep bug shows up only when comparing 16 bytes
56 or more and with at least one buffer not starting on a 4-byte boundary.
57 William Lewis provided this test program. */
58 {
59 char foo[21];
60 char bar[21];
61 int i;
62 for (i = 0; i < 4; i++)
63 {
64 char *a = foo + i;
65 char *b = bar + i;
66 strcpy (a, "--------01111111");
67 strcpy (b, "--------10000000");
68 ASSERT (memcasecmp (a, b, 16) < 0);
69 }
70 }
71
72 return 0;
73 }
74