blob: fe68b8f517db6dd06a16d719c4cc4fded29866bc (
plain)
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
|
/*
FUNCTION
<<strcspn>>---count chars not in string
INDEX
strcspn
ANSI_SYNOPSIS
size_t strcspn(const char *<[s1]>, const char *<[s2]>);
TRAD_SYNOPSIS
size_t strcspn(<[s1]>, <[s2]>)
char *<[s1]>;
char *<[s2]>;
DESCRIPTION
This function computes the length of the initial part of
the string pointed to by <[s1]> which consists entirely of
characters <[NOT]> from the string pointed to by <[s2]>
(excluding the terminating null character).
RETURNS
<<strcspn>> returns the length of the substring found.
PORTABILITY
<<strcspn>> is ANSI C.
<<strcspn>> requires no supporting OS subroutines.
*/
#include <string.h>
size_t
_DEFUN (strcspn, (s1, s2),
_CONST char *s1 _AND
_CONST char *s2)
{
_CONST char *s = s1;
_CONST char *c;
while (*s1)
{
for (c = s2; *c; c++)
{
if (*s1 == *c)
break;
}
if (*c)
break;
s1++;
}
return s1 - s;
}
|
