1 |
|
|
/* $OpenBSD: fgetwc.c,v 1.6 2015/12/24 19:55:39 schwarze Exp $ */ |
2 |
|
|
/* $NetBSD: fgetwc.c,v 1.3 2003/03/07 07:11:36 tshiozak Exp $ */ |
3 |
|
|
|
4 |
|
|
/*- |
5 |
|
|
* Copyright (c)2001 Citrus Project, |
6 |
|
|
* All rights reserved. |
7 |
|
|
* |
8 |
|
|
* Redistribution and use in source and binary forms, with or without |
9 |
|
|
* modification, are permitted provided that the following conditions |
10 |
|
|
* are met: |
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. |
16 |
|
|
* |
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 |
27 |
|
|
* SUCH DAMAGE. |
28 |
|
|
* |
29 |
|
|
* $Citrus$ |
30 |
|
|
*/ |
31 |
|
|
|
32 |
|
|
#include <errno.h> |
33 |
|
|
#include <stdio.h> |
34 |
|
|
#include <wchar.h> |
35 |
|
|
#include "local.h" |
36 |
|
|
|
37 |
|
|
wint_t |
38 |
|
|
__fgetwc_unlock(FILE *fp) |
39 |
|
|
{ |
40 |
|
|
struct wchar_io_data *wcio; |
41 |
|
|
mbstate_t *st; |
42 |
|
|
wchar_t wc; |
43 |
|
|
size_t size; |
44 |
|
|
|
45 |
|
|
_SET_ORIENTATION(fp, 1); |
46 |
|
|
wcio = WCIO_GET(fp); |
47 |
|
|
if (wcio == 0) { |
48 |
|
|
errno = ENOMEM; |
49 |
|
|
return WEOF; |
50 |
|
|
} |
51 |
|
|
|
52 |
|
|
/* if there're ungetwc'ed wchars, use them */ |
53 |
|
|
if (wcio->wcio_ungetwc_inbuf) { |
54 |
|
|
wc = wcio->wcio_ungetwc_buf[--wcio->wcio_ungetwc_inbuf]; |
55 |
|
|
|
56 |
|
|
return wc; |
57 |
|
|
} |
58 |
|
|
|
59 |
|
|
st = &wcio->wcio_mbstate_in; |
60 |
|
|
|
61 |
|
|
do { |
62 |
|
|
char c; |
63 |
|
|
int ch = __sgetc(fp); |
64 |
|
|
|
65 |
|
|
if (ch == EOF) { |
66 |
|
|
return WEOF; |
67 |
|
|
} |
68 |
|
|
|
69 |
|
|
c = ch; |
70 |
|
|
size = mbrtowc(&wc, &c, 1, st); |
71 |
|
|
if (size == (size_t)-1) { |
72 |
|
|
fp->_flags |= __SERR; |
73 |
|
|
return WEOF; |
74 |
|
|
} |
75 |
|
|
} while (size == (size_t)-2); |
76 |
|
|
|
77 |
|
|
return wc; |
78 |
|
|
} |
79 |
|
|
|
80 |
|
|
wint_t |
81 |
|
|
fgetwc(FILE *fp) |
82 |
|
|
{ |
83 |
|
|
wint_t r; |
84 |
|
|
|
85 |
|
|
FLOCKFILE(fp); |
86 |
|
|
r = __fgetwc_unlock(fp); |
87 |
|
|
FUNLOCKFILE(fp); |
88 |
|
|
|
89 |
|
|
return (r); |
90 |
|
|
} |
91 |
|
|
DEF_STRONG(fgetwc); |