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
|
/*
** Copyright 2011 Double Precision, Inc.
** See COPYING for distribution information.
**
*/
#include "unicode_config.h"
#include "courier-unicode.h"
#define BLOCK_SIZE 256
uint8_t unicode_tab_lookup(char32_t ch,
const size_t *unicode_indextab,
size_t unicode_indextab_sizeof,
const uint8_t (*unicode_rangetab)[2],
const uint8_t *unicode_classtab,
uint8_t uclass)
{
size_t cl=ch / BLOCK_SIZE;
if (cl < unicode_indextab_sizeof-1)
{
const size_t start_pos=unicode_indextab[cl];
const uint8_t (*p)[2]=unicode_rangetab + start_pos;
size_t b=0, e=unicode_indextab[cl+1] - start_pos;
uint8_t chmodcl= ch & (BLOCK_SIZE-1);
while (b < e)
{
size_t n=b + (e-b)/2;
if (chmodcl >= p[n][0])
{
if (chmodcl <= p[n][1])
{
uclass=unicode_classtab[start_pos+n];
break;
}
b=n+1;
}
else
{
e=n;
}
}
}
return uclass;
}
uint32_t unicode_tab32_lookup(char32_t ch,
const size_t *unicode_indextab,
size_t unicode_indextab_sizeof,
const uint8_t (*unicode_rangetab)[2],
const uint32_t *unicode_classtab,
uint32_t uclass)
{
size_t cl=ch / BLOCK_SIZE;
if (cl < unicode_indextab_sizeof-1)
{
const size_t start_pos=unicode_indextab[cl];
const uint8_t (*p)[2]=unicode_rangetab + start_pos;
size_t b=0, e=unicode_indextab[cl+1] - start_pos;
uint32_t chmodcl= ch & (BLOCK_SIZE-1);
while (b < e)
{
size_t n=b + (e-b)/2;
if (chmodcl >= p[n][0])
{
if (chmodcl <= p[n][1])
{
uclass=unicode_classtab[start_pos+n];
break;
}
b=n+1;
}
else
{
e=n;
}
}
}
return uclass;
}
|
