freebsd-dev/lib/libc/string/strchr.3
Simon L. B. Nielsen c9ae54eebb * Merge index(3) and rindex(3) to index(3) since the two functions are
almost identical.
* Merge strchr(3) and strrchr(3) to strchr(3) since the two functions
  are almost identical.
* Make the wording of index(3) and strchr(3) more similar.
* mdoc(7) cleanup.

Submitted by:	SUZUKI Koichi <metal@gc5.so-net.ne.jp>, keramida, myself
PR:		docs/32054
Reviewed by:	ru
Approved by:	ceri (mentor)
2003-07-28 22:50:42 +00:00

99 lines
3.0 KiB
Groff

.\" Copyright (c) 1990, 1991, 1993
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.\" This code is derived from software contributed to Berkeley by
.\" Chris Torek and the American National Standards Committee X3,
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.\" @(#)strchr.3 8.2 (Berkeley) 4/19/94
.\" $FreeBSD$
.\"
.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 *"
.Fn strchr "const char *s" "int c"
.Ft "char *"
.Fn strrchr "const char *s" "int c"
.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 part of the string.
.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.
If
.Fa c
is
.Ql \e0 ,
the functions locate the terminating
.Ql \e0 .
.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 .