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
|
/* Test whether a Unicode character is case-ignorable.
Copyright (C) 2002, 2006-2007, 2009-2015 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 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 "caseprop.h"
/* Quoting the Unicode standard:
Definition: A character is defined to be "case-ignorable" if it has the
value MidLetter {or the value MidNumLet} for the Word_Break property or
its General_Category is one of Nonspacing_Mark (Mn), Enclosing_Mark (Me),
Format (Cf), Modifier_Letter (Lm), or Modifier_Symbol (Sk).
The text marked in braces was added in Unicode 5.1.0, see
<http://www.unicode.org/versions/Unicode5.1.0/> section "Update of
Definition of case-ignorable". */
/* Since this predicate is only used for the "Before C" and "After C"
conditions of FINAL_SIGMA, we exclude the "cased" characters here.
This simplifies the evaluation of the regular expressions
\p{cased} (\p{case-ignorable})* C
and
C (\p{case-ignorable})* \p{cased}
*/
#if 0
#include "unictype.h"
#include "uniwbrk.h"
bool
uc_is_case_ignorable (ucs4_t uc)
{
int wbp = uc_wordbreak_property (uc);
return (wbp == WBP_MIDLETTER || wbp == WBP_MIDNUMLET
|| uc_is_general_category_withtable (uc, UC_CATEGORY_MASK_Mn
| UC_CATEGORY_MASK_Me
| UC_CATEGORY_MASK_Cf
| UC_CATEGORY_MASK_Lm
| UC_CATEGORY_MASK_Sk))
&& !uc_is_cased (uc);
}
#else
#include "unictype/bitmap.h"
/* Define u_casing_property_case_ignorable table. */
#include "ignorable.h"
bool
uc_is_case_ignorable (ucs4_t uc)
{
return bitmap_lookup (&u_casing_property_case_ignorable, uc);
}
#endif
|
