1 /* $NetBSD: ungetwc.c,v 1.3 2005/06/12 05:21:27 lukem Exp $ */
2 /* $DragonFly: src/lib/libc/stdio/ungetwc.c,v 1.1 2005/07/25 00:37:41 joerg Exp $ */
5 * Copyright (c)2001 Citrus Project,
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 #include "namespace.h"
37 #include "un-namespace.h"
39 #include "libc_private.h"
41 #include "priv_stdio.h"
44 ungetwc(wint_t wc
, FILE *fp
)
46 struct wchar_io_data
*wcio
;
54 _SET_ORIENTATION(fp
, 1);
56 * XXX since we have no way to transform a wchar string to
57 * a char string in reverse order, we can't use ungetc.
59 /* XXX should we flush ungetc buffer? */
64 errno
= ENOMEM
; /* XXX */
68 if (wcio
->wcio_ungetwc_inbuf
>= WCIO_UNGETWC_BUFSIZE
) {
73 wcio
->wcio_ungetwc_buf
[wcio
->wcio_ungetwc_inbuf
++] = wc
;