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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 seg-
     ment of s which consist only of bytes from accept.

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

ATTRIBUTES

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

     allbox; lbw19 lb lb l  l  l.   Interface Attribute Value  T{  strspn(),
     strcspn() T}   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 4.16 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)