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
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
|
/* Word breaks in UTF-8/UTF-16/UTF-32 strings. -*- coding: utf-8 -*-
Copyright (C) 2009-2016 Free Software Foundation, Inc.
Written by Bruno Haible <bruno@clisp.org>, 2009.
This program is free software: you can redistribute it and/or
modify it under the terms of either:
* 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.
or
* 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.
or both in parallel, as here.
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/>. */
void
FUNC (const UNIT *s, size_t n, char *p)
{
if (n > 0)
{
const UNIT *s_end = s + n;
/* Word break property of the last character.
-1 at the very beginning of the string. */
int last_char_prop = -1;
/* Format and Extend characters are ignored; this means, the mostly used
unit is the complex character (= character with subsequent ignored
characters).
Word break property of the last complex character.
-1 at the very beginning of the string. */
int last_compchar_prop = -1;
char *last_compchar_ptr = NULL;
/* For recognizing rules involving 3 complex characters:
Word break property of the second-to-last complex character.
-1 at the very beginning of the string. */
int secondlast_compchar_prop = -1;
/* Don't break inside multibyte characters. */
memset (p, 0, n);
while (s < s_end)
{
ucs4_t uc;
int count = U_MBTOUC_UNSAFE (&uc, s, s_end - s);
int prop = uc_wordbreak_property (uc);
/* No break at the start of the string. */
if (last_char_prop >= 0)
{
/* No break between CR and LF. */
if (last_char_prop == WBP_CR && prop == WBP_LF)
/* *p = 0 */;
/* Break before and after newlines. */
else if ((last_char_prop == WBP_CR
|| last_char_prop == WBP_LF
|| last_char_prop == WBP_NEWLINE)
|| (prop == WBP_CR
|| prop == WBP_LF
|| prop == WBP_NEWLINE))
*p = 1;
/* Ignore Format and Extend characters. */
else if (!(prop == WBP_EXTEND || prop == WBP_FORMAT))
{
/* No break in these situations (see UAX #29):
secondlast last current
(ALetter | HL) (MidLetter | MidNumLet | SQ) × (ALetter | HL) (WB7)
(ALetter | HL) × (MidLetter | MidNumLet | SQ) (ALetter | HL) (WB6)
Numeric (MidNum | MidNumLet | SQ) × Numeric (WB11)
Numeric × (MidNum | MidNumLet | SQ) Numeric (WB12)
HL × DQ HL (WB7b)
HL DQ × HL (WB7c)
(ALetter | HL) × (ALetter | HL) (WB5)
(ALetter | HL) × Numeric (WB9)
Numeric × (ALetter | HL) (WB10)
Numeric × Numeric (WB8)
HL × SQ (WB7a)
Katakana × Katakana (WB13)
(ALetter | HL | Numeric | Katakana) × ExtendNumLet (WB13a)
ExtendNumLet × ExtendNumLet (WB13a)
ExtendNumLet × (ALetter | HL | Numeric | Katakana) (WB13b)
Regional_Indicator × Regional_Indicator (WB13c)
*/
/* No break across certain punctuation. Also, disable word
breaks that were recognized earlier (due to lookahead of
only one complex character). */
if (((prop == WBP_ALETTER
|| prop == WBP_HL)
&& (last_compchar_prop == WBP_MIDLETTER
|| last_compchar_prop == WBP_MIDNUMLET
|| last_compchar_prop == WBP_SQ)
&& (secondlast_compchar_prop == WBP_ALETTER
|| secondlast_compchar_prop == WBP_HL))
|| (prop == WBP_NUMERIC
&& (last_compchar_prop == WBP_MIDNUM
|| last_compchar_prop == WBP_MIDNUMLET
|| last_compchar_prop == WBP_SQ)
&& secondlast_compchar_prop == WBP_NUMERIC)
|| (prop == WBP_HL
&& last_compchar_prop == WBP_DQ
&& secondlast_compchar_prop == WBP_HL))
{
*last_compchar_ptr = 0;
/* *p = 0; */
}
/* Break after Format and Extend characters. */
else if (last_compchar_prop == WBP_EXTEND
|| last_compchar_prop == WBP_FORMAT)
*p = 1;
else
{
/* Normalize property value to table index,
skipping 5 properties: WBP_EXTEND,
WBP_FORMAT, WBP_NEWLINE, WBP_CR, and
WBP_LF. */
int last_compchar_prop_index = last_compchar_prop;
int prop_index = prop;
if (last_compchar_prop_index >= WBP_EXTEND)
last_compchar_prop_index -= 5;
if (prop_index >= WBP_EXTEND)
prop_index -= 5;
/* Perform a single table lookup. */
if (uniwbrk_table[last_compchar_prop_index][prop_index])
*p = 1;
/* else *p = 0; */
}
}
}
last_char_prop = prop;
/* Ignore Format and Extend characters, except at the start
of the line. */
if (last_compchar_prop < 0
|| last_compchar_prop == WBP_CR
|| last_compchar_prop == WBP_LF
|| last_compchar_prop == WBP_NEWLINE
|| !(prop == WBP_EXTEND || prop == WBP_FORMAT))
{
secondlast_compchar_prop = last_compchar_prop;
last_compchar_prop = prop;
last_compchar_ptr = p;
}
s += count;
p += count;
}
}
}
|
