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
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
|
// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
//
// rbbirb.h
//
// Copyright (C) 2002-2008, International Business Machines Corporation and others.
// All Rights Reserved.
//
// This file contains declarations for several classes from the
// Rule Based Break Iterator rule builder.
//
#ifndef RBBIRB_H
#define RBBIRB_H
#include "unicode/utypes.h"
#if !UCONFIG_NO_BREAK_ITERATION
#include <utility>
#include "unicode/uobject.h"
#include "unicode/rbbi.h"
#include "unicode/uniset.h"
#include "unicode/parseerr.h"
#include "uhash.h"
#include "uvector.h"
#include "unicode/symtable.h"// For UnicodeSet parsing, is the interface that
// looks up references to $variables within a set.
U_NAMESPACE_BEGIN
class RBBIRuleScanner;
struct RBBIRuleTableEl;
class RBBISetBuilder;
class RBBINode;
class RBBITableBuilder;
//--------------------------------------------------------------------------------
//
// RBBISymbolTable. Implements SymbolTable interface that is used by the
// UnicodeSet parser to resolve references to $variables.
//
//--------------------------------------------------------------------------------
class RBBISymbolTableEntry : public UMemory { // The symbol table hash table contains one
public: // of these structs for each entry.
RBBISymbolTableEntry();
UnicodeString key;
RBBINode *val;
~RBBISymbolTableEntry();
private:
RBBISymbolTableEntry(const RBBISymbolTableEntry &other); // forbid copying of this class
RBBISymbolTableEntry &operator=(const RBBISymbolTableEntry &other); // forbid copying of this class
};
class RBBISymbolTable : public UMemory, public SymbolTable {
private:
const UnicodeString &fRules;
UHashtable *fHashTable;
RBBIRuleScanner *fRuleScanner;
// These next two fields are part of the mechanism for passing references to
// already-constructed UnicodeSets back to the UnicodeSet constructor
// when the pattern includes $variable references.
const UnicodeString ffffString; // = "/uffff"
UnicodeSet *fCachedSetLookup;
public:
// API inherited from class SymbolTable
virtual const UnicodeString* lookup(const UnicodeString& s) const;
virtual const UnicodeFunctor* lookupMatcher(UChar32 ch) const;
virtual UnicodeString parseReference(const UnicodeString& text,
ParsePosition& pos, int32_t limit) const;
// Additional Functions
RBBISymbolTable(RBBIRuleScanner *, const UnicodeString &fRules, UErrorCode &status);
virtual ~RBBISymbolTable();
virtual RBBINode *lookupNode(const UnicodeString &key) const;
virtual void addEntry (const UnicodeString &key, RBBINode *val, UErrorCode &err);
#ifdef RBBI_DEBUG
virtual void rbbiSymtablePrint() const;
#else
// A do-nothing inline function for non-debug builds. Member funcs can't be empty
// or the call sites won't compile.
int32_t fFakeField;
#define rbbiSymtablePrint() fFakeField=0;
#endif
private:
RBBISymbolTable(const RBBISymbolTable &other); // forbid copying of this class
RBBISymbolTable &operator=(const RBBISymbolTable &other); // forbid copying of this class
};
//--------------------------------------------------------------------------------
//
// class RBBIRuleBuilder The top-level class handling RBBI rule compiling.
//
//--------------------------------------------------------------------------------
class RBBIRuleBuilder : public UMemory {
public:
// Create a rule based break iterator from a set of rules.
// This function is the main entry point into the rule builder. The
// public ICU API for creating RBBIs uses this function to do the actual work.
//
static BreakIterator * createRuleBasedBreakIterator( const UnicodeString &rules,
UParseError *parseError,
UErrorCode &status);
public:
// The "public" functions and data members that appear below are accessed
// (and shared) by the various parts that make up the rule builder. They
// are NOT intended to be accessed by anything outside of the
// rule builder implementation.
RBBIRuleBuilder(const UnicodeString &rules,
UParseError *parseErr,
UErrorCode &status
);
virtual ~RBBIRuleBuilder();
/**
* Build the state tables and char class Trie from the source rules.
*/
RBBIDataHeader *build(UErrorCode &status);
/**
* Fold together redundant character classes (table columns) and
* redundant states (table rows). Done after initial table generation,
* before serializing the result.
*/
void optimizeTables();
char *fDebugEnv; // controls debug trace output
UErrorCode *fStatus; // Error reporting. Keeping status
UParseError *fParseError; // here avoids passing it everywhere.
const UnicodeString &fRules; // The rule string that we are compiling
UnicodeString fStrippedRules; // The rule string, with comments stripped.
RBBIRuleScanner *fScanner; // The scanner.
RBBINode *fForwardTree; // The parse trees, generated by the scanner,
RBBINode *fReverseTree; // then manipulated by subsequent steps.
RBBINode *fSafeFwdTree;
RBBINode *fSafeRevTree;
RBBINode **fDefaultTree; // For rules not qualified with a !
// the tree to which they belong to.
UBool fChainRules; // True for chained Unicode TR style rules.
// False for traditional regexp rules.
UBool fLBCMNoChain; // True: suppress chaining of rules on
// chars with LineBreak property == CM.
UBool fLookAheadHardBreak; // True: Look ahead matches cause an
// immediate break, no continuing for the
// longest match.
RBBISetBuilder *fSetBuilder; // Set and Character Category builder.
UVector *fUSetNodes; // Vector of all uset nodes.
RBBITableBuilder *fForwardTable; // State transition table, build time form.
UVector *fRuleStatusVals; // The values that can be returned
// from getRuleStatus().
RBBIDataHeader *flattenData(); // Create the flattened (runtime format)
// data tables..
private:
RBBIRuleBuilder(const RBBIRuleBuilder &other); // forbid copying of this class
RBBIRuleBuilder &operator=(const RBBIRuleBuilder &other); // forbid copying of this class
};
//----------------------------------------------------------------------------
//
// RBBISetTableEl is an entry in the hash table of UnicodeSets that have
// been encountered. The val Node will be of nodetype uset
// and contain pointers to the actual UnicodeSets.
// The Key is the source string for initializing the set.
//
// The hash table is used to avoid creating duplicate
// unnamed (not $var references) UnicodeSets.
//
// Memory Management:
// The Hash Table owns these RBBISetTableEl structs and
// the key strings. It does NOT own the val nodes.
//
//----------------------------------------------------------------------------
struct RBBISetTableEl {
UnicodeString *key;
RBBINode *val;
};
/**
* A pair of ints, used to bundle pairs of states or pairs of character classes.
*/
typedef std::pair<int32_t, int32_t> IntPair;
//----------------------------------------------------------------------------
//
// RBBIDebugPrintf Printf equivalent, for debugging output.
// Conditional compilation of the implementation lets us
// get rid of the stdio dependency in environments where it
// is unavailable.
//
//----------------------------------------------------------------------------
#ifdef RBBI_DEBUG
#include <stdio.h>
#define RBBIDebugPrintf printf
#define RBBIDebugPuts puts
#else
#undef RBBIDebugPrintf
#define RBBIDebugPuts(arg)
#endif
U_NAMESPACE_END
#endif /* #if !UCONFIG_NO_BREAK_ITERATION */
#endif
|
