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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)
April 12, 1993