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)