.\" Copyright (c) Bruno Haible <haible@clisp.cons.org>
.\"
.\" This is free documentation; you can redistribute it and/or
.\" modify it under the terms of the GNU General Public License as
.\" published by the Free Software Foundation; either version 2 of
.\" the License, or (at your option) any later version.
.\"
.\" References consulted:
.\"   GNU glibc-2 source code and manual
.\"   Dinkumware C library reference http://www.dinkumware.com/
.\"   OpenGroup's Single UNIX specification http://www.UNIX-systems.org/online.html
.\"   ISO/IEC 9899:1999
.\"
.TH WCSSTR 3  2011-09-28 "GNU" "Linux Programmer's Manual"
.SH NAME
wcsstr \- locate a substring in a wide-character string
.SH SYNOPSIS
.nf
.B #include <wchar.h>
.sp
.BI "wchar_t *wcsstr(const wchar_t *" haystack ", const wchar_t *" needle );
.fi
.SH DESCRIPTION
The
.BR wcsstr ()
function is the wide-character equivalent of the
.BR strstr (3)
function.
It searches for the first occurrence of the wide-character string
\fIneedle\fP (without its terminating null wide character (L\(aq\\0\(aq))
as a substring in the wide-character string \fIhaystack\fP.
.SH "RETURN VALUE"
The
.BR wcsstr ()
function returns a pointer to the first occurrence of
\fIneedle\fP in \fIhaystack\fP.
It returns NULL if \fIneedle\fP does not occur
as a substring in \fIhaystack\fP.
.PP
Note the special case:
If \fIneedle\fP is the empty wide-character string,
the return value is always \fIhaystack\fP itself.
.SH "CONFORMING TO"
C99.
.SH "SEE ALSO"
.BR strstr (3),
.BR wcschr (3)
.SH COLOPHON
This page is part of release 3.44 of the Linux
.I man-pages
project.
A description of the project,
and information about reporting bugs,
can be found at
http://www.kernel.org/doc/man-pages/.