1 // © 2016 and later: Unicode, Inc. and others.
2 // License & terms of use: http://www.unicode.org/copyright.html
3 /*
4 *******************************************************************************
5 *
6 * Copyright (C) 1999-2003, International Business Machines
7 * Corporation and others. All Rights Reserved.
8 *
9 *******************************************************************************
10 * file name: scrptrun.h
11 *
12 * created on: 10/17/2001
13 * created by: Eric R. Mader
14 */
15
16 #ifndef __SCRPTRUN_H
17 #define __SCRPTRUN_H
18
19 #include "unicode/utypes.h"
20 #include "unicode/uobject.h"
21 #include "unicode/uscript.h"
22
23 struct ScriptRecord
24 {
25 UChar32 startChar;
26 UChar32 endChar;
27 UScriptCode scriptCode;
28 };
29
30 struct ParenStackEntry
31 {
32 int32_t pairIndex;
33 UScriptCode scriptCode;
34 };
35
36 class ScriptRun : public UObject {
37 public:
38 ScriptRun();
39
40 ScriptRun(const UChar chars[], int32_t length);
41
42 ScriptRun(const UChar chars[], int32_t start, int32_t length);
43
44 void reset();
45
46 void reset(int32_t start, int32_t count);
47
48 void reset(const UChar chars[], int32_t start, int32_t length);
49
50 int32_t getScriptStart();
51
52 int32_t getScriptEnd();
53
54 UScriptCode getScriptCode();
55
56 UBool next();
57
58 /**
59 * ICU "poor man's RTTI", returns a UClassID for the actual class.
60 *
61 * @stable ICU 2.2
62 */
getDynamicClassID()63 virtual inline UClassID getDynamicClassID() const { return getStaticClassID(); }
64
65 /**
66 * ICU "poor man's RTTI", returns a UClassID for this class.
67 *
68 * @stable ICU 2.2
69 */
getStaticClassID()70 static inline UClassID getStaticClassID() { return (UClassID)&fgClassID; }
71
72 private:
73
74 static UBool sameScript(int32_t scriptOne, int32_t scriptTwo);
75
76 int32_t charStart;
77 int32_t charLimit;
78 const UChar *charArray;
79
80 int32_t scriptStart;
81 int32_t scriptEnd;
82 UScriptCode scriptCode;
83
84 ParenStackEntry parenStack[128];
85 int32_t parenSP;
86
87 static int8_t highBit(int32_t value);
88 static int32_t getPairIndex(UChar32 ch);
89
90 static UChar32 pairedChars[];
91 static const int32_t pairedCharCount;
92 static const int32_t pairedCharPower;
93 static const int32_t pairedCharExtra;
94
95 /**
96 * The address of this static class variable serves as this class's ID
97 * for ICU "poor man's RTTI".
98 */
99 static const char fgClassID;
100 };
101
ScriptRun()102 inline ScriptRun::ScriptRun()
103 {
104 reset(NULL, 0, 0);
105 }
106
ScriptRun(const UChar chars[],int32_t length)107 inline ScriptRun::ScriptRun(const UChar chars[], int32_t length)
108 {
109 reset(chars, 0, length);
110 }
111
ScriptRun(const UChar chars[],int32_t start,int32_t length)112 inline ScriptRun::ScriptRun(const UChar chars[], int32_t start, int32_t length)
113 {
114 reset(chars, start, length);
115 }
116
getScriptStart()117 inline int32_t ScriptRun::getScriptStart()
118 {
119 return scriptStart;
120 }
121
getScriptEnd()122 inline int32_t ScriptRun::getScriptEnd()
123 {
124 return scriptEnd;
125 }
126
getScriptCode()127 inline UScriptCode ScriptRun::getScriptCode()
128 {
129 return scriptCode;
130 }
131
reset()132 inline void ScriptRun::reset()
133 {
134 scriptStart = charStart;
135 scriptEnd = charStart;
136 scriptCode = USCRIPT_INVALID_CODE;
137 parenSP = -1;
138 }
139
reset(int32_t start,int32_t length)140 inline void ScriptRun::reset(int32_t start, int32_t length)
141 {
142 charStart = start;
143 charLimit = start + length;
144
145 reset();
146 }
147
reset(const UChar chars[],int32_t start,int32_t length)148 inline void ScriptRun::reset(const UChar chars[], int32_t start, int32_t length)
149 {
150 charArray = chars;
151
152 reset(start, length);
153 }
154
155
156 #endif
157