1*7dc2d469Sschwarze /* $OpenBSD: fgetwc.c,v 1.6 2015/12/24 19:55:39 schwarze Exp $ */
2c2fb3212Sespie /* $NetBSD: fgetwc.c,v 1.3 2003/03/07 07:11:36 tshiozak Exp $ */
3c2fb3212Sespie
4c2fb3212Sespie /*-
5c2fb3212Sespie * Copyright (c)2001 Citrus Project,
6c2fb3212Sespie * All rights reserved.
7c2fb3212Sespie *
8c2fb3212Sespie * Redistribution and use in source and binary forms, with or without
9c2fb3212Sespie * modification, are permitted provided that the following conditions
10c2fb3212Sespie * are met:
11c2fb3212Sespie * 1. Redistributions of source code must retain the above copyright
12c2fb3212Sespie * notice, this list of conditions and the following disclaimer.
13c2fb3212Sespie * 2. Redistributions in binary form must reproduce the above copyright
14c2fb3212Sespie * notice, this list of conditions and the following disclaimer in the
15c2fb3212Sespie * documentation and/or other materials provided with the distribution.
16c2fb3212Sespie *
17c2fb3212Sespie * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18c2fb3212Sespie * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19c2fb3212Sespie * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20c2fb3212Sespie * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21c2fb3212Sespie * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22c2fb3212Sespie * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23c2fb3212Sespie * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24c2fb3212Sespie * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25c2fb3212Sespie * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26c2fb3212Sespie * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27c2fb3212Sespie * SUCH DAMAGE.
28c2fb3212Sespie *
29c2fb3212Sespie * $Citrus$
30c2fb3212Sespie */
31c2fb3212Sespie
32c2fb3212Sespie #include <errno.h>
33c2fb3212Sespie #include <stdio.h>
34c2fb3212Sespie #include <wchar.h>
35c2fb3212Sespie #include "local.h"
36c2fb3212Sespie
37c2fb3212Sespie wint_t
__fgetwc_unlock(FILE * fp)38c2fb3212Sespie __fgetwc_unlock(FILE *fp)
39c2fb3212Sespie {
40c2fb3212Sespie struct wchar_io_data *wcio;
41c2fb3212Sespie mbstate_t *st;
42c2fb3212Sespie wchar_t wc;
43c2fb3212Sespie size_t size;
44c2fb3212Sespie
45c2fb3212Sespie _SET_ORIENTATION(fp, 1);
46c2fb3212Sespie wcio = WCIO_GET(fp);
47c2fb3212Sespie if (wcio == 0) {
48c2fb3212Sespie errno = ENOMEM;
49c2fb3212Sespie return WEOF;
50c2fb3212Sespie }
51c2fb3212Sespie
52c2fb3212Sespie /* if there're ungetwc'ed wchars, use them */
53c2fb3212Sespie if (wcio->wcio_ungetwc_inbuf) {
54c2fb3212Sespie wc = wcio->wcio_ungetwc_buf[--wcio->wcio_ungetwc_inbuf];
55c2fb3212Sespie
56c2fb3212Sespie return wc;
57c2fb3212Sespie }
58c2fb3212Sespie
59c2fb3212Sespie st = &wcio->wcio_mbstate_in;
60c2fb3212Sespie
61c2fb3212Sespie do {
62c2fb3212Sespie char c;
63c2fb3212Sespie int ch = __sgetc(fp);
64c2fb3212Sespie
65c2fb3212Sespie if (ch == EOF) {
66c2fb3212Sespie return WEOF;
67c2fb3212Sespie }
68c2fb3212Sespie
69c2fb3212Sespie c = ch;
70c2fb3212Sespie size = mbrtowc(&wc, &c, 1, st);
71c2fb3212Sespie if (size == (size_t)-1) {
72*7dc2d469Sschwarze fp->_flags |= __SERR;
73c2fb3212Sespie return WEOF;
74c2fb3212Sespie }
75c2fb3212Sespie } while (size == (size_t)-2);
76c2fb3212Sespie
77c2fb3212Sespie return wc;
78c2fb3212Sespie }
79c2fb3212Sespie
80c2fb3212Sespie wint_t
fgetwc(FILE * fp)81c2fb3212Sespie fgetwc(FILE *fp)
82c2fb3212Sespie {
83c2fb3212Sespie wint_t r;
84c2fb3212Sespie
85c5acf43aSkurt FLOCKFILE(fp);
86c2fb3212Sespie r = __fgetwc_unlock(fp);
87c5acf43aSkurt FUNLOCKFILE(fp);
88c2fb3212Sespie
89c2fb3212Sespie return (r);
90c2fb3212Sespie }
919b9d2a55Sguenther DEF_STRONG(fgetwc);
92