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
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
|
/**
* $Id:
*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* This program 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; either version 2
* 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 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* The Original Code is Copyright (C) 2009 Blender Foundation.
* All rights reserved.
*
*
* Contributor(s): Blender Foundation
*
* ***** END GPL LICENSE BLOCK *****
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
unsigned int blf_next_p2(unsigned int x)
{
x -= 1;
x |= (x >> 16);
x |= (x >> 8);
x |= (x >> 4);
x |= (x >> 2);
x |= (x >> 1);
x += 1;
return(x);
}
unsigned int blf_hash(unsigned int val)
{
unsigned int key;
key= val;
key += ~(key << 16);
key ^= (key >> 5);
key += (key << 3);
key ^= (key >> 13);
key += ~(key << 9);
key ^= (key >> 17);
return(key % 257);
}
/*
* This function is from Imlib2 library (font_main.c), a
* library that does image file loading and saving as well
* as rendering, manipulation, arbitrary polygon support, etc.
*
* Copyright (C) 2000 Carsten Haitzler and various contributors
* The original name: imlib_font_utf8_get_next
* more info here: http://docs.enlightenment.org/api/imlib2/html/
*/
int blf_utf8_next(unsigned char *buf, int *iindex)
{
/* Reads UTF8 bytes from 'buf', starting at 'index' and
* returns the code point of the next valid code point.
* 'index' is updated ready for the next call.
*
* Returns 0 to indicate an error (e.g. invalid UTF8)
*/
int index= *iindex, r;
unsigned char d= buf[index++], d2, d3, d4;
if (!d)
return(0);
if (d < 0x80) {
*iindex= index;
return(d);
}
if ((d & 0xe0) == 0xc0) {
/* 2 byte */
d2= buf[index++];
if ((d2 & 0xc0) != 0x80)
return(0);
r= d & 0x1f; /* copy lower 5 */
r <<= 6;
r |= (d2 & 0x3f); /* copy lower 6 */
}
else if ((d & 0xf0) == 0xe0) {
/* 3 byte */
d2= buf[index++];
d3= buf[index++];
if ((d2 & 0xc0) != 0x80 || (d3 & 0xc0) != 0x80)
return(0);
r= d & 0x0f; /* copy lower 4 */
r <<= 6;
r |= (d2 & 0x3f);
r <<= 6;
r |= (d3 & 0x3f);
}
else {
/* 4 byte */
d2= buf[index++];
d3= buf[index++];
d4= buf[index++];
if ((d2 & 0xc0) != 0x80 || (d3 & 0xc0) != 0x80 ||
(d4 & 0xc0) != 0x80)
return(0);
r= d & 0x0f; /* copy lower 4 */
r <<= 6;
r |= (d2 & 0x3f);
r <<= 6;
r |= (d3 & 0x3f);
r <<= 6;
r |= (d4 & 0x3f);
}
*iindex= index;
return(r);
}
|