NAME

strspn, strcspn - get length of a prefix substring

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 (in bytes) of the initial segment of s which consists entirely of bytes in accept.

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

RETURN VALUE

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

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

ATTRIBUTES

CONFORMING TO

SVr4, 4.3BSD, C89, C99.

SEE ALSO

index(3), memchr(3), rindex(3), strchr(3), string(3), strpbrk(3), strsep(3), strstr(3), strtok(3), wcscspn(3), wcsspn(3)

COLOPHON

This page is part of release 3.64 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.