ICU 65.1 65.1

bytestriebuilder.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: bytestriebuilder.h
9 * encoding: UTF-8
10 * tab size: 8 (not used)
11 * indentation:4
12 *
13 * created on: 2010sep25
14 * created by: Markus W. Scherer
15 */
16
22 #ifndef __BYTESTRIEBUILDER_H__
23 #define __BYTESTRIEBUILDER_H__
24
25 #include "unicode/utypes.h"
26
27 #if U_SHOW_CPLUSPLUS_API
28
29 #include "unicode/bytestrie.h"
30 #include "unicode/stringpiece.h"
31 #include "unicode/stringtriebuilder.h"
32
33 U_NAMESPACE_BEGIN
34
35 class BytesTrieElement;
36 class CharString;
43 class U_COMMON_API BytesTrieBuilder : public StringTrieBuilder {
44 public:
50 BytesTrieBuilder(UErrorCode &errorCode);
51
56 virtual ~BytesTrieBuilder();
57
72 BytesTrieBuilder &add(StringPiece s, int32_t value, UErrorCode &errorCode);
73
92 BytesTrie *build(UStringTrieBuildOption buildOption, UErrorCode &errorCode);
93
116 StringPiece buildStringPiece(UStringTrieBuildOption buildOption, UErrorCode &errorCode);
117
124 BytesTrieBuilder &clear();
125
126 private:
127 BytesTrieBuilder(const BytesTrieBuilder &other); // no copy constructor
128 BytesTrieBuilder &operator=(const BytesTrieBuilder &other); // no assignment operator
129
130 void buildBytes(UStringTrieBuildOption buildOption, UErrorCode &errorCode);
131
132 virtual int32_t getElementStringLength(int32_t i) const;
133 virtual char16_t getElementUnit(int32_t i, int32_t byteIndex) const;
134 virtual int32_t getElementValue(int32_t i) const;
135
136 virtual int32_t getLimitOfLinearMatch(int32_t first, int32_t last, int32_t byteIndex) const;
137
138 virtual int32_t countElementUnits(int32_t start, int32_t limit, int32_t byteIndex) const;
139 virtual int32_t skipElementsBySomeUnits(int32_t i, int32_t byteIndex, int32_t count) const;
140 virtual int32_t indexOfElementWithNextUnit(int32_t i, int32_t byteIndex, char16_t byte) const;
141
142 virtual UBool matchNodesCanHaveValues() const { return FALSE; }
143
144 virtual int32_t getMaxBranchLinearSubNodeLength() const { return BytesTrie::kMaxBranchLinearSubNodeLength; }
145 virtual int32_t getMinLinearMatch() const { return BytesTrie::kMinLinearMatch; }
146 virtual int32_t getMaxLinearMatchLength() const { return BytesTrie::kMaxLinearMatchLength; }
147
151 class BTLinearMatchNode : public LinearMatchNode {
152 public:
153 BTLinearMatchNode(const char *units, int32_t len, Node *nextNode);
154 virtual UBool operator==(const Node &other) const;
155 virtual void write(StringTrieBuilder &builder);
156 private:
157 const char *s;
158 };
159
160 virtual Node *createLinearMatchNode(int32_t i, int32_t byteIndex, int32_t length,
161 Node *nextNode) const;
162
163 UBool ensureCapacity(int32_t length);
164 virtual int32_t write(int32_t byte);
165 int32_t write(const char *b, int32_t length);
166 virtual int32_t writeElementUnits(int32_t i, int32_t byteIndex, int32_t length);
167 virtual int32_t writeValueAndFinal(int32_t i, UBool isFinal);
168 virtual int32_t writeValueAndType(UBool hasValue, int32_t value, int32_t node);
169 virtual int32_t writeDeltaTo(int32_t jumpTarget);
170
171 CharString *strings; // Pointer not object so we need not #include internal charstr.h.
172 BytesTrieElement *elements;
173 int32_t elementsCapacity;
174 int32_t elementsLength;
175
176 // Byte serialization of the trie.
177 // Grows from the back: bytesLength measures from the end of the buffer!
178 char *bytes;
179 int32_t bytesCapacity;
180 int32_t bytesLength;
181 };
182
183 U_NAMESPACE_END
184
185 #endif /* U_SHOW_CPLUSPLUS_API */
186
187 #endif // __BYTESTRIEBUILDER_H__
stringtriebuilder.h
C++ API: Builder API for trie builders.
bytestrie.h
C++ API: Trie for mapping byte sequences to integer values.
icu::BytesTrieBuilder
Builder class for BytesTrie.
Definition: bytestriebuilder.h:43
icu::operator==
U_EXPORT UBool operator==(const StringPiece &x, const StringPiece &y)
Global operator == for StringPiece.
icu::BytesTrie
Light-weight, non-const reader class for a BytesTrie.
Definition: bytestrie.h:53
stringpiece.h
C++ API: StringPiece: Read-only byte string wrapper class.
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
utypes.h
Basic definitions for ICU, for both C and C++ APIs.
FALSE
#define FALSE
The FALSE value of a UBool.
Definition: umachine.h:269
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::StringPiece
A string-like object that points to a sized piece of memory.
Definition: stringpiece.h:60
UBool
int8_t UBool
The ICU boolean type.
Definition: umachine.h:261