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
|
/*
* Copyright (C) 2006 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
//
#ifndef ANDROID_UNICODE_H
#define ANDROID_UNICODE_H
#include <stdint.h>
#include <sys/types.h>
#define REPLACEMENT_CHAR (0xFFFD)
// this part of code is copied from umachine.h under ICU
/**
* Define UChar32 as a type for single Unicode code points.
* UChar32 is a signed 32-bit integer (same as int32_t).
*
* The Unicode code point range is 0..0x10ffff.
* All other values (negative or >=0x110000) are illegal as Unicode code points.
* They may be used as sentinel values to indicate "done", "error"
* or similar non-code point conditions.
*
* @stable ICU 2.4
*/
typedef int32_t UChar32;
namespace android {
class Encoding;
/**
* \class Unicode
*
* Helper class for getting properties of Unicode characters. Characters
* can have one of the types listed in CharType and each character can have the
* directionality of Direction.
*/
class Unicode
{
public:
/**
* Directions specified in the Unicode standard. These directions map directly
* to java.lang.Character.
*/
enum Direction {
DIRECTIONALITY_UNDEFINED = -1,
DIRECTIONALITY_LEFT_TO_RIGHT,
DIRECTIONALITY_RIGHT_TO_LEFT,
DIRECTIONALITY_RIGHT_TO_LEFT_ARABIC,
DIRECTIONALITY_EUROPEAN_NUMBER,
DIRECTIONALITY_EUROPEAN_NUMBER_SEPARATOR,
DIRECTIONALITY_EUROPEAN_NUMBER_TERMINATOR,
DIRECTIONALITY_ARABIC_NUMBER,
DIRECTIONALITY_COMMON_NUMBER_SEPARATOR,
DIRECTIONALITY_NONSPACING_MARK,
DIRECTIONALITY_BOUNDARY_NEUTRAL,
DIRECTIONALITY_PARAGRAPH_SEPARATOR,
DIRECTIONALITY_SEGMENT_SEPARATOR,
DIRECTIONALITY_WHITESPACE,
DIRECTIONALITY_OTHER_NEUTRALS,
DIRECTIONALITY_LEFT_TO_RIGHT_EMBEDDING,
DIRECTIONALITY_LEFT_TO_RIGHT_OVERRIDE,
DIRECTIONALITY_RIGHT_TO_LEFT_EMBEDDING,
DIRECTIONALITY_RIGHT_TO_LEFT_OVERRIDE,
DIRECTIONALITY_POP_DIRECTIONAL_FORMAT
};
/**
* Returns the packed data for java calls
* @param c The unicode character.
* @return The packed data for the character.
*
* Copied from java.lang.Character implementation:
* 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
* F E D C B A 9 8 7 6 5 4 3 2 1 0 F E D C B A 9 8 7 6 5 4 3 2 1 0
*
* 31 types ---------
* 18 directionalities ---------
* 2 mirroreds -
* ----------- 56 toupper diffs
* ----------- 48 tolower diffs
* --- 4 totitlecase diffs
* ------------- 84 numeric values
* --------- 24 mirror char diffs
*/
static uint32_t getPackedData(UChar32 c);
/**
* Get the directionality of the character.
* @param c The unicode character.
* @return The direction of the character or DIRECTIONALITY_UNDEFINED.
*/
static Direction getDirectionality(UChar32 c);
/**
* Check if the character is a mirrored character. This means that the character
* has an equivalent character that is the mirror image of itself.
* @param c The unicode character.
* @return True iff c has a mirror equivalent.
*/
static bool isMirrored(UChar32 c);
/**
* Return the mirror of the given character.
* @param c The unicode character.
* @return The mirror equivalent of c. If c does not have a mirror equivalent,
* the original character is returned.
* @see isMirrored
*/
static UChar32 toMirror(UChar32 c);
};
}
#endif
|