2 * Copyright (C) 2008-2018 Free Software Foundation, Inc.
3 * Written by Eric Blake
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.
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.
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/>. */
25 #include "zerosize-ptr.h"
28 /* Calculating void * + int is not portable, so this wrapper converts
29 to char * to make the tests easier to write. */
30 #define MEMCHR2 (char *) memchr2
36 char *input
= malloc (n
);
41 memset (input
+ 2, 'c', 1024);
42 memset (input
+ 1026, 'd', n
- 1028);
46 /* Basic behavior tests. */
47 ASSERT (MEMCHR2 (input
, 'a', 'b', n
) == input
);
48 ASSERT (MEMCHR2 (input
, 'b', 'a', n
) == input
);
50 ASSERT (MEMCHR2 (input
, 'a', 'b', 0) == NULL
);
51 ASSERT (MEMCHR2 (zerosize_ptr (), 'a', 'b', 0) == NULL
);
53 ASSERT (MEMCHR2 (input
, 'b', 'd', n
) == input
+ 1);
54 ASSERT (MEMCHR2 (input
+ 2, 'b', 'd', n
- 2) == input
+ 1026);
56 ASSERT (MEMCHR2 (input
, 'd', 'e', n
) == input
+ 1026);
57 ASSERT (MEMCHR2 (input
, 'e', 'd', n
) == input
+ 1026);
59 ASSERT (MEMCHR2 (input
+ 1, 'a', 'e', n
- 1) == input
+ n
- 2);
60 ASSERT (MEMCHR2 (input
+ 1, 'e', 'a', n
- 1) == input
+ n
- 2);
62 ASSERT (MEMCHR2 (input
, 'f', 'g', n
) == NULL
);
63 ASSERT (MEMCHR2 (input
, 'f', '\0', n
) == NULL
);
65 ASSERT (MEMCHR2 (input
, 'a', 'a', n
) == input
);
66 ASSERT (MEMCHR2 (input
+ 1, 'a', 'a', n
- 1) == input
+ n
- 1);
67 ASSERT (MEMCHR2 (input
, 'f', 'f', n
) == NULL
);
69 /* Check that a very long haystack is handled quickly if one of the
70 two bytes is found near the beginning. */
72 size_t repeat
= 10000;
73 for (; repeat
> 0; repeat
--)
75 ASSERT (MEMCHR2 (input
, 'c', 'e', n
) == input
+ 2);
76 ASSERT (MEMCHR2 (input
, 'e', 'c', n
) == input
+ 2);
77 ASSERT (MEMCHR2 (input
, 'c', '\0', n
) == input
+ 2);
78 ASSERT (MEMCHR2 (input
, '\0', 'c', n
) == input
+ 2);
82 /* Alignment tests. */
85 for (i
= 0; i
< 32; i
++)
87 for (j
= 0; j
< 256; j
++)
89 for (j
= 0; j
< 256; j
++)
91 ASSERT (MEMCHR2 (input
+ i
, j
, 0xff, 256) == input
+ i
+ j
);
92 ASSERT (MEMCHR2 (input
+ i
, 0xff, j
, 256) == input
+ i
+ j
);