84 lines
2.7 KiB
Groff
84 lines
2.7 KiB
Groff
.\" Copyright (c) 1990, 1991, 1993
|
|
.\" 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, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\" 3. All advertising materials mentioning features or use of this software
|
|
.\" must display the following acknowledgement:
|
|
.\" This product includes software developed by the University of
|
|
.\" California, Berkeley and its contributors.
|
|
.\" 4. 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 BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" @(#)index.3 8.1 (Berkeley) 6/4/93
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd June 4, 1993
|
|
.Dt INDEX 3
|
|
.Os
|
|
.Sh NAME
|
|
.Nm index
|
|
.Nd locate character in string
|
|
.Sh LIBRARY
|
|
.Lb libc
|
|
.Sh SYNOPSIS
|
|
.Fd #include <string.h>
|
|
.Ft char *
|
|
.Fn index "const char *s" "int c"
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Fn index
|
|
function
|
|
locates the first character matching
|
|
.Fa c
|
|
(converted to a
|
|
.Em char )
|
|
in the null-terminated string
|
|
.Fa s .
|
|
.Sh RETURN VALUES
|
|
A pointer to the character is returned if it is found; otherwise
|
|
.Dv NULL
|
|
is returned.
|
|
If
|
|
.Fa c
|
|
is '\e0',
|
|
.Fn index
|
|
locates the terminating '\e0'.
|
|
.Sh SEE ALSO
|
|
.Xr memchr 3 ,
|
|
.Xr rindex 3 ,
|
|
.Xr strchr 3 ,
|
|
.Xr strcspn 3 ,
|
|
.Xr strpbrk 3 ,
|
|
.Xr strrchr 3 ,
|
|
.Xr strsep 3 ,
|
|
.Xr strspn 3 ,
|
|
.Xr strstr 3 ,
|
|
.Xr strtok 3
|
|
.Sh HISTORY
|
|
A
|
|
.Fn index
|
|
function appeared in
|
|
.At v6 .
|