ICU 67.1 67.1

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
24 #include "unicode/stringtriebuilder.h"
25 #include "unicode/ucharstrie.h"
26 #include "unicode/unistr.h"
27
33 U_NAMESPACE_BEGIN
34
35 class UCharsTrieElement;
36
43 class U_COMMON_API UCharsTrieBuilder : public StringTrieBuilder {
44 public:
50 UCharsTrieBuilder(UErrorCode &errorCode);
51
56 virtual ~UCharsTrieBuilder();
57
72 UCharsTrieBuilder &add(const UnicodeString &s, int32_t value, UErrorCode &errorCode);
73
92 UCharsTrie *build(UStringTrieBuildOption buildOption, UErrorCode &errorCode);
93
118 UnicodeString &buildUnicodeString(UStringTrieBuildOption buildOption, UnicodeString &result,
119 UErrorCode &errorCode);
120
127 UCharsTrieBuilder &clear() {
128 strings.remove();
129 elementsLength=0;
130 ucharsLength=0;
131 return *this;
132 }
133
134 private:
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
188 U_NAMESPACE_END
189
190 #endif /* U_SHOW_CPLUSPLUS_API */
191
192 #endif // __UCHARSTRIEBUILDER_H__
stringtriebuilder.h
C++ API: Builder API for trie builders.
icu::UCharsTrieBuilder::clear
UCharsTrieBuilder & clear()
Removes all (string, value) pairs.
Definition: ucharstriebuilder.h:127
unistr.h
C++ API: Unicode String.
icu::operator==
U_EXPORT UBool operator==(const StringPiece &x, const StringPiece &y)
Global operator == for StringPiece.
icu::UCharsTrieBuilder
Builder class for UCharsTrie.
Definition: ucharstriebuilder.h:43
TRUE
#define TRUE
The TRUE value of a UBool.
Definition: umachine.h:265
UStringTrieBuildOption
UStringTrieBuildOption
Build options for BytesTrieBuilder and CharsTrieBuilder.
Definition: stringtriebuilder.h:41
UErrorCode
UErrorCode
Standard ICU4C error code type, a substitute for exceptions.
Definition: utypes.h:415
ucharstrie.h
C++ API: Trie for mapping Unicode strings (or 16-bit-unit sequences) to integer values.
utypes.h
Basic definitions for ICU, for both C and C++ APIs.
U_COMMON_API
#define U_COMMON_API
Set to export library symbols from inside the common library, and to import them from outside...
Definition: utypes.h:300
icu::UnicodeString
UnicodeString is a string class that stores Unicode characters directly and provides similar function...
Definition: unistr.h:294
icu::UCharsTrie
Light-weight, non-const reader class for a UCharsTrie.
Definition: ucharstrie.h:53
UBool
int8_t UBool
The ICU boolean type.
Definition: umachine.h:261