kolibrios/contrib/sdk/sources/newlib/string/strcspn.c
Sergey Semyonov (Serge) 754f9336f0 upload sdk
git-svn-id: svn://kolibrios.org@4349 a494cfbc-eb01-0410-851d-a64ba20cac60
2013-12-15 08:09:20 +00:00

55 lines
951 B
C

/*
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;
}