0,0 → 1,54 |
/* |
FUNCTION |
<<strcspn>>---count characters 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; |
} |