1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
|
#include <stdio.h>
#include <string.h>
int main(void)
{
const char haystack[] = "haystack";
const char empty[] = "";
const char *p;
size_t len;
p = strchr(haystack, 'a');
printf("found 'a' at offset %zd\n", p ? p - haystack : -1);
if (p != haystack + 1)
goto error;
p = strchr(haystack, 'b');
printf("found 'b' at offset %zd\n", p ? p - haystack : -1);
if (p != NULL)
goto error;
p = strchr(haystack, 0);
printf("found 0 at offset %zd\n", p ? p - haystack : -1);
if (p != haystack + 8)
goto error;
p = strrchr(haystack, 'a');
printf("found 'a' at offset %zd\n", p ? p - haystack : -1);
if (p != haystack + 5)
goto error;
p = strrchr(haystack, 'b');
printf("found 'b' at offset %zd\n", p ? p - haystack : -1);
if (p != NULL)
goto error;
p = strrchr(haystack, 0);
printf("found 0 at offset %zd\n", p ? p - haystack : -1);
if (p != haystack + 8)
goto error;
len = strspn(haystack, "hasty");
printf("found %zu chars from 'hasty'\n", len);
if (len != 6)
goto error;
len = strspn(haystack, "haystack");
printf("found %zu chars from 'haystack'\n", len);
if (len != 8)
goto error;
len = strspn(haystack, "");
printf("found %zu chars from ''\n", len);
if (len != 0)
goto error;
len = strcspn(haystack, "stick");
printf("found %zu chars not from 'stick'\n", len);
if (len != 3)
goto error;
len = strcspn(haystack, "needle");
printf("found %zu chars not from 'needle'\n", len);
if (len != 8)
goto error;
len = strcspn(haystack, "");
printf("found %zu chars not from ''\n", len);
if (len != 8)
goto error;
p = strpbrk(haystack, "stick");
printf("found char from 'stick' at offset %zd\n", p ? p - haystack : -1);
if (p != haystack + 3)
goto error;
p = strpbrk(haystack, "needle");
printf("found char from 'needle' at offset %zd\n", p ? p - haystack : -1);
if (p != NULL)
goto error;
p = strpbrk(haystack, "");
printf("found char from '' at offset %zd\n", p ? p - haystack : -1);
if (p != NULL)
goto error;
p = strstr(haystack, "stack");
printf("found 'stack' at offset %zd\n", p ? p - haystack : -1);
if (p != haystack + 3)
goto error;
p = strstr(haystack, "tacks");
printf("found 'tacks' at offset %zd\n", p ? p - haystack : -1);
if (p != NULL)
goto error;
p = strstr(haystack, "needle");
printf("found 'needle' at offset %zd\n", p ? p - haystack : -1);
if (p != NULL)
goto error;
p = strstr(haystack, "k");
printf("found 'k' at offset %zd\n", p ? p - haystack : -1);
if (p != haystack + 7)
goto error;
p = strstr(haystack, "b");
printf("found 'b' at offset %zd\n", p ? p - haystack : -1);
if (p != NULL)
goto error;
p = strstr(haystack, "kk");
printf("found 'kk' at offset %zd\n", p ? p - haystack : -1);
if (p != NULL)
goto error;
p = strstr(haystack, "");
printf("found '' at offset %zd\n", p ? p - haystack : -1);
if (p != haystack)
goto error;
p = strstr(empty, "");
printf("found '' at offset %zd\n", p ? p - empty : -1);
if (p != empty)
goto error;
return 0;
error:
printf("unexpected result\n");
return 1;
}
|
