STRSPN(3)						     Linux Programmer's Manual							 STRSPN(3)

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

       For an explanation of the terms used in this section, see attributes(7).

       +--------------------+---------------+---------+
       |Interface	    | Attribute     | Value   |
       +--------------------+---------------+---------+
       |strspn(), strcspn() | Thread safety | MT-Safe |
       +--------------------+---------------+---------+
CONFORMING TO

       POSIX.1-2001, POSIX.1-2008, C89, C99, SVr4, 4.3BSD.

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 4.15 of the Linux man-pages project.  A description of the project, information about reporting bugs, and the
       latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.

								    2015-08-08								 STRSPN(3)