1#ifndef _GNU_SOURCE
2#define _GNU_SOURCE 1
3#endif
4#include <string.h>
5#include "test.h"
6
7#define N(s, tail, sub) { \
8	char *p = s tail; \
9	char *q = memmem(p, strlen(s), sub, strlen(sub)); \
10	if (q) \
11		t_error("memmem("#s" "#tail", %d, "#sub", %d) returned str+%d, wanted 0\n",\
12			strlen(s), strlen(sub), q-p); \
13}
14
15#define T(s, sub, n) { \
16	char *p = s; \
17	char *q = memmem(p, strlen(p), sub, strlen(sub)); \
18	if (q == 0) \
19		t_error("memmem(%s,%s) returned 0, wanted str+%d\n", #s, #sub, n); \
20	else if (q - p != n) \
21		t_error("memmem(%s,%s) returned str+%d, wanted str+%d\n", #s, #sub, q-p, n); \
22}
23
24int main(void)
25{
26	N("","a", "a")
27	N("a","a", "aa")
28	N("a","b", "b")
29	N("aa","b", "ab")
30	N("aa","a", "aaa")
31	N("aba","b", "bab")
32	N("abba","b", "bab")
33	N("abba","ba", "aba")
34	N("abc abc","d", "abcd")
35	N("0-1-2-3-4-5-6-7-8-9","", "-3-4-56-7-8-")
36	N("0-1-2-3-4-5-6-7-8-9","", "-3-4-5+6-7-8-")
37	N("_ _ _\xff_ _ _","\x7f_", "_\x7f_")
38	N("_ _ _\x7f_ _ _","\xff_", "_\xff_")
39
40	T("", "", 0)
41	T("abcd", "", 0)
42	T("abcd", "a", 0)
43	T("abcd", "b", 1)
44	T("abcd", "c", 2)
45	T("abcd", "d", 3)
46	T("abcd", "ab", 0)
47	T("abcd", "bc", 1)
48	T("abcd", "cd", 2)
49	T("ababa", "baba", 1)
50	T("ababab", "babab", 1)
51	T("abababa", "bababa", 1)
52	T("abababab", "bababab", 1)
53	T("ababababa", "babababa", 1)
54	T("abbababab", "bababa", 2)
55	T("abbababab", "ababab", 3)
56	T("abacabcabcab", "abcabcab", 4)
57	T("nanabanabanana", "aba", 3)
58	T("nanabanabanana", "ban", 4)
59	T("nanabanabanana", "anab", 1)
60	T("nanabanabanana", "banana", 8)
61	T("_ _\xff_ _", "_\xff_", 2)
62
63	return t_status;
64}
65