1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
|
/*
* virt_wcrtomb.c
*
* $Id: virt_wcrtomb.c,v 1.1.1.1 2006/04/11 17:56:16 source Exp $
*
* This file is part of the OpenLink Software Virtuoso Open-Source (VOS)
* project.
*
* Copyright (C) 1998-2006 OpenLink Software
*
* This project is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; only version 2 of the License, dated June 1991.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*
*/
#include "libutil.h"
size_t
virt_wcrtomb (unsigned char *s, wchar_t wc, virt_mbstate_t *ps)
{
char fake[1];
size_t written = 0;
static virt_mbstate_t internal;
if (ps == NULL)
ps = &internal;
if (s == NULL)
{
s = (unsigned char *) fake;
wc = L'\0';
}
/* Store the UTF8 representation of WC. */
if (wc < 0 || wc > 0x7fffffff)
{
/* This is no correct ISO 10646 character. */
/* errno = (EILSEQ); */
return (size_t) -1;
}
if (wc < 0x80)
{
/* It's a one byte sequence. */
if (s != NULL)
*s = (char) wc;
return 1;
}
for (written = 2; written < 6; ++written)
if ((wc & virt_utf8_encoding_mask[written - 2]) == 0)
break;
if (s != NULL)
{
size_t cnt = written;
s[0] = virt_utf8_encoding_byte[cnt - 2];
--cnt;
do
{
s[cnt] = 0x80 | (wc & 0x3f);
wc >>= 6;
}
while (--cnt > 0);
s[0] |= wc;
}
return written;
}
|
