redhat man page for strcspn

STRSPN(3)						     Linux Programmer's Manual							 STRSPN(3)

NAME
       strspn, strcspn - search a string for a set of characters

SYNOPSIS
       #include <string.h>

       size_t strspn(const char *s, const char *accept);

       size_t strcspn(const char *s, const char *reject);

DESCRIPTION
       The strspn() function calculates the length of the initial segment of s which consists entirely of characters in accept.

       The strcspn() function calculates the length of the initial segment of s which consists entirely of characters not in reject.

RETURN VALUE
       The strspn() function returns the number of characters in the initial segment of s which consist only of characters from accept.

       The strcspn() function returns the number of characters in the initial segment of s which are not in the string reject.

CONFORMING TO
       SVID 3, POSIX, BSD 4.3, ISO 9899

SEE ALSO
       index(3), memchr(3), rindex(3), strchr(3), strpbrk(3), strsep(3), strstr(3), strtok(3)

								    1993-04-12								 STRSPN(3)