bsd man page for strspn

STRSPN(3)						     Library Functions Manual							 STRSPN(3)

NAME
       strspn - span a string

SYNOPSIS
       #include <string.h>

       size_t
       strspn(s, charset)
       char *s;
       char *charset;

DESCRIPTION
       The strcspn() function spans the initial part of the null-terminated string s as long as the characters from s occur in string charset .

RETURN VALUES
       The strspn() function returns the number of characters spanned.

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

STANDARDS
       The strspn() function conforms to ANSI C X3.159-9189 (``ANSI C'').

4.4 Berkeley Distribution					 January 12, 1996							 STRSPN(3)