1a64d82da5
when talking about characters/bytes, use "nul" and "nul-terminate" when talking about pointers, use "null pointer" or ".Dv NULL"
93 lines
2.8 KiB
Groff
93 lines
2.8 KiB
Groff
.\" Copyright (c) 1990, 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" This code is derived from software contributed to Berkeley by
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.\" Chris Torek and the American National Standards Committee X3,
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.\" on Information Processing Systems.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" from: @(#)strspn.3 8.1 (Berkeley) 6/4/93
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.\" $NetBSD: strspn.3,v 1.11 2006/10/16 08:48:45 wiz Exp $
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.\"
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.Dd August 11, 2002
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.Dt STRSPN 3
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.Os
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.Sh NAME
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.Nm strspn
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.Nd span a string
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.Sh LIBRARY
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.Lb libc
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.Sh SYNOPSIS
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.In string.h
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.Ft size_t
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.Fn strspn "const char *s" "const char *charset"
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.Sh DESCRIPTION
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The
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.Fn strspn
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function
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spans the initial part of the nul-terminated string
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.Fa s
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as long as the characters from
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.Fa s
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occur in string
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.Fa charset .
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.Sh RETURN VALUES
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The
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.Fn strspn
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function
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returns the number of characters spanned.
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.Sh EXAMPLES
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The following call to
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.Fn strspn
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will return 3, since the first three characters of string
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.Fa s
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are part of string
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.Fa charset :
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.Bd -literal -offset indent
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char *s = "foobar";
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char *charset = "of";
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size_t span;
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span = strspn(s, charset);
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.Ed
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.Sh SEE ALSO
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.Xr index 3 ,
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.Xr memchr 3 ,
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.Xr rindex 3 ,
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.Xr strchr 3 ,
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.Xr strcspn 3 ,
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.Xr strpbrk 3 ,
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.Xr strrchr 3 ,
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.Xr strsep 3 ,
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.Xr strstr 3 ,
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.Xr strtok 3
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.Sh STANDARDS
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The
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.Fn strspn
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function
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conforms to
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.St -ansiC .
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