.\" 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.
.\"
.\" %sccs.include.redist.man%
.\"
.\"	@(#)strspn.3	5.1 (Berkeley) %G%
.\"
.TH STRSPN 3 ""
.UC 7
.SH NAME
strspn \- span a string
.SH SYNOPSIS
.nf
.ft B
#include <string.h>

size_t
strspn(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
occur in string
.IR charset .
.B Strspn
returns the number of characters spanned.
.SH SEE ALSO
index(3), memchr(3), rindex(3), strchr(3), strcspn(3), strpbrk(3), strrchr(3),
strsep(3), strstr(3), strtok(3)
.SH STANDARDS
.B Strspn
conforms to ANSI X3.159-1989 (``ANSI C'').