strspn

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 5.06 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)