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/* $OpenBSD: fgetws.c,v 1.6 2009/11/09 00:18:27 kurt Exp $ */
/* $NetBSD: fgetws.c,v 1.1 2003/03/07 07:11:37 tshiozak Exp $ */
/*-
* Copyright (c) 2002 Tim J. Robbins.
* All rights reserved.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*
* Original version ID:
* FreeBSD: src/lib/libc/stdio/fgetws.c,v 1.4 2002/09/20 13:25:40 tjr Exp
*
*/
#include <errno.h>
#include <stdio.h>
#include <wchar.h>
#include "local.h"
wchar_t *
fgetws(wchar_t * __restrict ws, int n, FILE * __restrict fp)
{
wchar_t *wsp;
wint_t wc;
FLOCKFILE(fp);
_SET_ORIENTATION(fp, 1);
if (n <= 0) {
errno = EINVAL;
goto error;
}
wsp = ws;
while (n-- > 1) {
if ((wc = __fgetwc_unlock(fp)) == WEOF && errno == EILSEQ) {
goto error;
}
if (wc == WEOF) {
if (wsp == ws) {
/* EOF/error, no characters read yet. */
goto error;
}
break;
}
*wsp++ = (wchar_t)wc;
if (wc == L'\n') {
break;
}
}
*wsp++ = L'\0';
FUNLOCKFILE(fp);
return (ws);
error:
FUNLOCKFILE(fp);
return (NULL);
}
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