ICU 66.1 66.1
ucharstriebuilder.h
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1// © 2016 and later: Unicode, Inc. and others.
2// License & terms of use: http://www.unicode.org/copyright.html
3/*
4*******************************************************************************
5* Copyright (C) 2010-2016, International Business Machines
6* Corporation and others. All Rights Reserved.
7*******************************************************************************
8* file name: ucharstriebuilder.h
9* encoding: UTF-8
10* tab size: 8 (not used)
11* indentation:4
12*
13* created on: 2010nov14
14* created by: Markus W. Scherer
15*/
16
17#ifndef __UCHARSTRIEBUILDER_H__
18#define __UCHARSTRIEBUILDER_H__
19
20#include "unicode/utypes.h"
21
22#if U_SHOW_CPLUSPLUS_API
23
25#include "unicode/ucharstrie.h"
26#include "unicode/unistr.h"
27
33U_NAMESPACE_BEGIN
34
35class UCharsTrieElement;
36
43class U_COMMON_API UCharsTrieBuilder : public StringTrieBuilder {
44public:
51
57
72 UCharsTrieBuilder &add(const UnicodeString &s, int32_t value, UErrorCode &errorCode);
73
93
119 UErrorCode &errorCode);
120
128 strings.remove();
129 elementsLength=0;
130 ucharsLength=0;
131 return *this;
132 }
133
134private:
135 UCharsTrieBuilder(const UCharsTrieBuilder &other); // no copy constructor
136 UCharsTrieBuilder &operator=(const UCharsTrieBuilder &other); // no assignment operator
137
138 void buildUChars(UStringTrieBuildOption buildOption, UErrorCode &errorCode);
139
140 virtual int32_t getElementStringLength(int32_t i) const;
141 virtual char16_t getElementUnit(int32_t i, int32_t unitIndex) const;
142 virtual int32_t getElementValue(int32_t i) const;
143
144 virtual int32_t getLimitOfLinearMatch(int32_t first, int32_t last, int32_t unitIndex) const;
145
146 virtual int32_t countElementUnits(int32_t start, int32_t limit, int32_t unitIndex) const;
147 virtual int32_t skipElementsBySomeUnits(int32_t i, int32_t unitIndex, int32_t count) const;
148 virtual int32_t indexOfElementWithNextUnit(int32_t i, int32_t unitIndex, char16_t unit) const;
149
150 virtual UBool matchNodesCanHaveValues() const { return TRUE; }
151
152 virtual int32_t getMaxBranchLinearSubNodeLength() const { return UCharsTrie::kMaxBranchLinearSubNodeLength; }
153 virtual int32_t getMinLinearMatch() const { return UCharsTrie::kMinLinearMatch; }
154 virtual int32_t getMaxLinearMatchLength() const { return UCharsTrie::kMaxLinearMatchLength; }
155
156 class UCTLinearMatchNode : public LinearMatchNode {
157 public:
158 UCTLinearMatchNode(const char16_t *units, int32_t len, Node *nextNode);
159 virtual UBool operator==(const Node &other) const;
160 virtual void write(StringTrieBuilder &builder);
161 private:
162 const char16_t *s;
163 };
164
165 virtual Node *createLinearMatchNode(int32_t i, int32_t unitIndex, int32_t length,
166 Node *nextNode) const;
167
168 UBool ensureCapacity(int32_t length);
169 virtual int32_t write(int32_t unit);
170 int32_t write(const char16_t *s, int32_t length);
171 virtual int32_t writeElementUnits(int32_t i, int32_t unitIndex, int32_t length);
172 virtual int32_t writeValueAndFinal(int32_t i, UBool isFinal);
173 virtual int32_t writeValueAndType(UBool hasValue, int32_t value, int32_t node);
174 virtual int32_t writeDeltaTo(int32_t jumpTarget);
175
176 UnicodeString strings;
177 UCharsTrieElement *elements;
178 int32_t elementsCapacity;
179 int32_t elementsLength;
180
181 // char16_t serialization of the trie.
182 // Grows from the back: ucharsLength measures from the end of the buffer!
183 char16_t *uchars;
184 int32_t ucharsCapacity;
185 int32_t ucharsLength;
186};
187
188U_NAMESPACE_END
189
190#endif /* U_SHOW_CPLUSPLUS_API */
191
192#endif // __UCHARSTRIEBUILDER_H__
Builder class for UCharsTrie.
UCharsTrieBuilder & add(const UnicodeString &s, int32_t value, UErrorCode &errorCode)
Adds a (string, value) pair.
UCharsTrie * build(UStringTrieBuildOption buildOption, UErrorCode &errorCode)
Builds a UCharsTrie for the add()ed data.
UnicodeString & buildUnicodeString(UStringTrieBuildOption buildOption, UnicodeString &result, UErrorCode &errorCode)
Builds a UCharsTrie for the add()ed data and char16_t-serializes it.
virtual ~UCharsTrieBuilder()
Destructor.
UCharsTrieBuilder(UErrorCode &errorCode)
Constructs an empty builder.
UCharsTrieBuilder & clear()
Removes all (string, value) pairs.
Light-weight, non-const reader class for a UCharsTrie.
Definition: ucharstrie.h:53
UnicodeString is a string class that stores Unicode characters directly and provides similar function...
Definition: unistr.h:295
U_EXPORT UBool operator==(const StringPiece &x, const StringPiece &y)
Global operator == for StringPiece.
C++ API: Builder API for trie builders.
UStringTrieBuildOption
Build options for BytesTrieBuilder and CharsTrieBuilder.
C++ API: Trie for mapping Unicode strings (or 16-bit-unit sequences) to integer values.
int8_t UBool
The ICU boolean type.
Definition: umachine.h:261
#define TRUE
The TRUE value of a UBool.
Definition: umachine.h:265
C++ API: Unicode String.
Basic definitions for ICU, for both C and C++ APIs.
UErrorCode
Standard ICU4C error code type, a substitute for exceptions.
Definition: utypes.h:415
#define U_COMMON_API
Set to export library symbols from inside the common library, and to import them from outside.
Definition: utypes.h:300