Libc-498.1.7.tar.gz

[apple/libc.git] / string / strchr.3

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.\"     @(#)strchr.3	8.2 (Berkeley) 4/19/94
.\" $FreeBSD: src/lib/libc/string/strchr.3,v 1.11 2003/09/04 20:36:54 simon Exp $
.\"
.Dd April 19, 1994
.Dt STRCHR 3
.Os
.Sh NAME
.Nm strchr , strrchr
.Nd locate character in string
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.In string.h
.Ft "char *"
.Fo strchr
.Fa "const char *s"
.Fa "int c"
.Fc
.Ft "char *"
.Fo strrchr
.Fa "const char *s"
.Fa "int c"
.Fc
.Sh DESCRIPTION
The
.Fn strchr
function locates the first occurrence of
.Fa c
(converted to a
.Vt char )
in the string pointed to by
.Fa s .
The terminating null character is considered to be part of the string;
therefore if
.Fa c
is
.Ql \e0 ,
the functions locate the terminating
.Ql \e0 .
.Pp
The
.Fn strrchr
function is identical to
.Fn strchr ,
except it locates the last occurrence of
.Fa c .
.Sh RETURN VALUES
The functions
.Fn strchr
and
.Fn strrchr
return a pointer to the located character, or
.Dv NULL
if the character does not appear in the string.
.Sh SEE ALSO
.Xr memchr 3 ,
.Xr strcspn 3 ,
.Xr strpbrk 3 ,
.Xr strsep 3 ,
.Xr strspn 3 ,
.Xr strstr 3 ,
.Xr strtok 3
.Sh STANDARDS
The functions
.Fn strchr
and
.Fn strrchr
conform to
.St -isoC .