ICU 70.1  70.1
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 
33 U_NAMESPACE_BEGIN
34 
35 class UCharsTrieElement;
36 
43 class U_COMMON_API UCharsTrieBuilder : public StringTrieBuilder {
44 public:
51 
56  virtual ~UCharsTrieBuilder();
57 
72  UCharsTrieBuilder &add(const UnicodeString &s, int32_t value, UErrorCode &errorCode);
73 
93 
120  UErrorCode &errorCode);
121 
129  strings.remove();
130  elementsLength=0;
131  ucharsLength=0;
132  return *this;
133  }
134 
135 private:
136  UCharsTrieBuilder(const UCharsTrieBuilder &other); // no copy constructor
137  UCharsTrieBuilder &operator=(const UCharsTrieBuilder &other); // no assignment operator
138 
139  void buildUChars(UStringTrieBuildOption buildOption, UErrorCode &errorCode);
140 
141  virtual int32_t getElementStringLength(int32_t i) const override;
142  virtual char16_t getElementUnit(int32_t i, int32_t unitIndex) const override;
143  virtual int32_t getElementValue(int32_t i) const override;
144 
145  virtual int32_t getLimitOfLinearMatch(int32_t first, int32_t last, int32_t unitIndex) const override;
146 
147  virtual int32_t countElementUnits(int32_t start, int32_t limit, int32_t unitIndex) const override;
148  virtual int32_t skipElementsBySomeUnits(int32_t i, int32_t unitIndex, int32_t count) const override;
149  virtual int32_t indexOfElementWithNextUnit(int32_t i, int32_t unitIndex, char16_t unit) const override;
150 
151  virtual UBool matchNodesCanHaveValues() const override { return true; }
152 
153  virtual int32_t getMaxBranchLinearSubNodeLength() const override { return UCharsTrie::kMaxBranchLinearSubNodeLength; }
154  virtual int32_t getMinLinearMatch() const override { return UCharsTrie::kMinLinearMatch; }
155  virtual int32_t getMaxLinearMatchLength() const override { return UCharsTrie::kMaxLinearMatchLength; }
156 
157  class UCTLinearMatchNode : public LinearMatchNode {
158  public:
159  UCTLinearMatchNode(const char16_t *units, int32_t len, Node *nextNode);
160  virtual bool operator==(const Node &other) const override;
161  virtual void write(StringTrieBuilder &builder) override;
162  private:
163  const char16_t *s;
164  };
165 
166  virtual Node *createLinearMatchNode(int32_t i, int32_t unitIndex, int32_t length,
167  Node *nextNode) const override;
168 
169  UBool ensureCapacity(int32_t length);
170  virtual int32_t write(int32_t unit) override;
171  int32_t write(const char16_t *s, int32_t length);
172  virtual int32_t writeElementUnits(int32_t i, int32_t unitIndex, int32_t length) override;
173  virtual int32_t writeValueAndFinal(int32_t i, UBool isFinal) override;
174  virtual int32_t writeValueAndType(UBool hasValue, int32_t value, int32_t node) override;
175  virtual int32_t writeDeltaTo(int32_t jumpTarget) override;
176 
177  UnicodeString strings;
178  UCharsTrieElement *elements;
179  int32_t elementsCapacity;
180  int32_t elementsLength;
181 
182  // char16_t serialization of the trie.
183  // Grows from the back: ucharsLength measures from the end of the buffer!
184  char16_t *uchars;
185  int32_t ucharsCapacity;
186  int32_t ucharsLength;
187 };
188 
189 U_NAMESPACE_END
190 
191 #endif /* U_SHOW_CPLUSPLUS_API */
192 
193 #endif // __UCHARSTRIEBUILDER_H__
Builder class for UCharsTrie.
UCharsTrie * build(UStringTrieBuildOption buildOption, UErrorCode &errorCode)
Builds a UCharsTrie for the add()ed data.
virtual ~UCharsTrieBuilder()
Destructor.
UnicodeString & buildUnicodeString(UStringTrieBuildOption buildOption, UnicodeString &result, UErrorCode &errorCode)
Builds a UCharsTrie for the add()ed data and char16_t-serializes it.
UCharsTrieBuilder(UErrorCode &errorCode)
Constructs an empty builder.
UCharsTrieBuilder & clear()
Removes all (string, value) pairs.
UCharsTrieBuilder & add(const UnicodeString &s, int32_t value, UErrorCode &errorCode)
Adds a (string, value) pair.
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:296
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, a signed-byte integer.
Definition: umachine.h:269
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