strspn(3) -- Linux man page

 

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)