95 lines
2.7 KiB
Groff
95 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 and the American National Standards Committee X3,
|
||
|
|
.\" on Information Processing Systems.
|
||
|
|
.\"
|
||
|
|
.\" 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. 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.
|
||
|
|
.\"
|
||
|
|
.\" from: @(#)memchr.3 8.1 (Berkeley) 6/4/93
|
||
|
|
.\" $NetBSD: memchr.3,v 1.11 2009/04/10 23:24:35 wiz Exp $
|
||
|
|
.\"
|
||
|
|
.Dd April 10, 2009
|
||
|
|
.Dt MEMCHR 3
|
||
|
|
.Os
|
||
|
|
.Sh NAME
|
||
|
|
.Nm memchr ,
|
||
|
|
.Nm memrchr
|
||
|
|
.Nd locate byte in byte string
|
||
|
|
.Sh LIBRARY
|
||
|
|
.Lb libc
|
||
|
|
.Sh SYNOPSIS
|
||
|
|
.In string.h
|
||
|
|
.Ft void *
|
||
|
|
.Fn memchr "const void *b" "int c" "size_t len"
|
||
|
|
.Ft void *
|
||
|
|
.Fn memrchr "const void *b" "int c" "size_t len"
|
||
|
|
.Sh DESCRIPTION
|
||
|
|
The
|
||
|
|
.Fn memchr
|
||
|
|
function
|
||
|
|
locates the first occurrence of
|
||
|
|
.Fa c
|
||
|
|
(converted to an unsigned char)
|
||
|
|
in string
|
||
|
|
.Fa b .
|
||
|
|
The
|
||
|
|
.Fn memrchr
|
||
|
|
function
|
||
|
|
locates the last occurrence of
|
||
|
|
.Fa c
|
||
|
|
(converted to an unsigned char)
|
||
|
|
in string
|
||
|
|
.Fa b .
|
||
|
|
.Sh RETURN VALUES
|
||
|
|
The
|
||
|
|
.Fn memchr
|
||
|
|
and
|
||
|
|
.Fn memrchr
|
||
|
|
functions
|
||
|
|
return a pointer to the byte located, or
|
||
|
|
.Dv NULL
|
||
|
|
if no such byte exists within
|
||
|
|
.Fa len
|
||
|
|
bytes.
|
||
|
|
.Sh SEE ALSO
|
||
|
|
.Xr index 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 STANDARDS
|
||
|
|
The
|
||
|
|
.Fn memchr
|
||
|
|
function
|
||
|
|
conforms to
|
||
|
|
.St -ansiC .
|