blob: 8d94bf57ace6655a41b3c3798306d855afcdf7b4 (
about) (
plain)
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
|
/* Conversion UCS-4 to UTF-8.
Copyright (C) 2002, 2006-2007, 2009-2014 Free Software Foundation, Inc.
Written by Bruno Haible <bruno@clisp.org>, 2002.
This program is free software: you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published
by the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include <config.h>
/* Specification. */
#include "unistr.h"
int
u8_uctomb_aux (uint8_t *s, ucs4_t uc, int n)
{
int count;
if (uc < 0x80)
/* The case n >= 1 is already handled by the caller. */
return -2;
else if (uc < 0x800)
count = 2;
else if (uc < 0x10000)
{
if (uc < 0xd800 || uc >= 0xe000)
count = 3;
else
return -1;
}
#if 0
else if (uc < 0x200000)
count = 4;
else if (uc < 0x4000000)
count = 5;
else if (uc <= 0x7fffffff)
count = 6;
#else
else if (uc < 0x110000)
count = 4;
#endif
else
return -1;
if (n < count)
return -2;
switch (count) /* note: code falls through cases! */
{
#if 0
case 6: s[5] = 0x80 | (uc & 0x3f); uc = uc >> 6; uc |= 0x4000000;
case 5: s[4] = 0x80 | (uc & 0x3f); uc = uc >> 6; uc |= 0x200000;
#endif
case 4: s[3] = 0x80 | (uc & 0x3f); uc = uc >> 6; uc |= 0x10000;
case 3: s[2] = 0x80 | (uc & 0x3f); uc = uc >> 6; uc |= 0x800;
case 2: s[1] = 0x80 | (uc & 0x3f); uc = uc >> 6; uc |= 0xc0;
/*case 1:*/ s[0] = uc;
}
return count;
}
|
