]>
git.proxmox.com Git - mirror_edk2.git/blob - StdLib/LibC/Stdio/ungetwc.c
2 * Copyright (c)2001 Citrus Project,
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 NetBSD: ungetwc.c,v 1.3 2005/06/12 05:21:27 lukem Exp
30 #include <LibConfig.h>
31 #include <sys/EfiCdefs.h>
37 #include "reentrant.h"
41 ungetwc(wint_t wc
, FILE *fp
)
43 struct wchar_io_data
*wcio
;
51 _SET_ORIENTATION(fp
, 1);
53 * XXX since we have no way to transform a wchar string to
54 * a char string in reverse order, we can't use ungetc.
56 /* XXX should we flush ungetc buffer? */
61 errno
= ENOMEM
; /* XXX */
65 if (wcio
->wcio_ungetwc_inbuf
>= WCIO_UNGETWC_BUFSIZE
) {
70 wcio
->wcio_ungetwc_buf
[wcio
->wcio_ungetwc_inbuf
++] = (wchar_t)wc
;