usr/src/lib/libc/string/strcspn.3

.\" Copyright (c) 1990 The Regents of the University of California.
.\" All rights reserved.
.\"
.\" This code is derived from software contributed to Berkeley by
.\" Chris Torek.
.\"
.\" Redistribution and use in source and binary forms are permitted
.\" provided that: (1) source distributions retain this entire copyright
.\" notice and comment, and (2) distributions including binaries display
.\" the following acknowledgement:  ``This product includes software
.\" developed by the University of California, Berkeley and its contributors''
.\" in the documentation or other materials provided with the distribution
.\" and in all advertising materials mentioning features or use of this
.\" software. Neither the name of the University nor the names of its
.\" contributors may be used to endorse or promote products derived
.\" from this software without specific prior written permission.
.\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
.\" IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
.\" WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
.\"
.\"     @(#)strcspn.3   5.1 (Berkeley) 5/15/90
.\"
.TH STRCSPN 3 "May 15, 1990"
.UC 7
.SH NAME
strcspn \- span the complement of a string
.SH SYNOPSIS
.nf
.ft B
#include <string.h>

size_t
strcspn(const char *s, const char *charset);
.ft R
.fi
.SH DESCRIPTION
.B Strcspn
spans the initial part of the null-terminated string
.I s
as long as the characters from
.I s
do not occur in string
.I charset
(i.e.,
.I strcspn
spans the
.I complement
of
.IR charset ).
.B Strcspn
returns the number of characters spanned.
.SH SEE ALSO
index(3), memchr(3), rindex(3), strchr(3), strpbrk(3), strrchr(3),
strsep(3), strspn(3), strstr(3), strtok(3)
.SH STANDARDS
.B Strcspn
conforms to ANSI X3.159-1989 (``ANSI C'').