strspn(3) — Linux manual page

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ATTRIBUTES | CONFORMING TO | SEE ALSO | COLOPHON

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

NAME         top

       strspn, strcspn - get length of a prefix substring

SYNOPSIS         top

       #include <string.h>

       size_t strspn(const char *s, const char *accept);
       size_t strcspn(const char *s, const char *reject);

DESCRIPTION         top

       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         top

       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         top

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

       ┌──────────────────────────────────────┬───────────────┬─────────┐
       │Interface                             Attribute     Value   │
       ├──────────────────────────────────────┼───────────────┼─────────┤
       │strspn(), strcspn()                   │ Thread safety │ MT-Safe │
       └──────────────────────────────────────┴───────────────┴─────────┘

CONFORMING TO         top

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

SEE ALSO         top

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

COLOPHON         top

       This page is part of release 5.13 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/.

                               2021-03-22                      STRSPN(3)

Pages that refer to this page: index(3)memchr(3)strchr(3)string(3)strpbrk(3)strsep(3)strstr(3)strtok(3)wcscspn(3)wcsspn(3)signal-safety(7)