ICU 50.1.2  50.1.2
ucharstriebuilder.h
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1 /*
2 *******************************************************************************
3 * Copyright (C) 2010-2012, International Business Machines
4 * Corporation and others. All Rights Reserved.
5 *******************************************************************************
6 * file name: ucharstriebuilder.h
7 * encoding: US-ASCII
8 * tab size: 8 (not used)
9 * indentation:4
10 *
11 * created on: 2010nov14
12 * created by: Markus W. Scherer
13 */
14 
15 #ifndef __UCHARSTRIEBUILDER_H__
16 #define __UCHARSTRIEBUILDER_H__
17 
18 #include "unicode/utypes.h"
20 #include "unicode/ucharstrie.h"
21 #include "unicode/unistr.h"
22 
29 
30 class UCharsTrieElement;
31 
39 public:
45  UCharsTrieBuilder(UErrorCode &errorCode);
46 
51  virtual ~UCharsTrieBuilder();
52 
67  UCharsTrieBuilder &add(const UnicodeString &s, int32_t value, UErrorCode &errorCode);
68 
84  UCharsTrie *build(UStringTrieBuildOption buildOption, UErrorCode &errorCode);
85 
107  UnicodeString &buildUnicodeString(UStringTrieBuildOption buildOption, UnicodeString &result,
108  UErrorCode &errorCode);
109 
117  strings.remove();
118  elementsLength=0;
119  ucharsLength=0;
120  return *this;
121  }
122 
123 private:
124  UCharsTrieBuilder(const UCharsTrieBuilder &other); // no copy constructor
125  UCharsTrieBuilder &operator=(const UCharsTrieBuilder &other); // no assignment operator
126 
127  void buildUChars(UStringTrieBuildOption buildOption, UErrorCode &errorCode);
128 
129  virtual int32_t getElementStringLength(int32_t i) const;
130  virtual UChar getElementUnit(int32_t i, int32_t unitIndex) const;
131  virtual int32_t getElementValue(int32_t i) const;
132 
133  virtual int32_t getLimitOfLinearMatch(int32_t first, int32_t last, int32_t unitIndex) const;
134 
135  virtual int32_t countElementUnits(int32_t start, int32_t limit, int32_t unitIndex) const;
136  virtual int32_t skipElementsBySomeUnits(int32_t i, int32_t unitIndex, int32_t count) const;
137  virtual int32_t indexOfElementWithNextUnit(int32_t i, int32_t unitIndex, UChar unit) const;
138 
139  virtual UBool matchNodesCanHaveValues() const { return TRUE; }
140 
141  virtual int32_t getMaxBranchLinearSubNodeLength() const { return UCharsTrie::kMaxBranchLinearSubNodeLength; }
142  virtual int32_t getMinLinearMatch() const { return UCharsTrie::kMinLinearMatch; }
143  virtual int32_t getMaxLinearMatchLength() const { return UCharsTrie::kMaxLinearMatchLength; }
144 
145 #ifndef U_HIDE_INTERNAL_API
146  class UCTLinearMatchNode : public LinearMatchNode {
147  public:
148  UCTLinearMatchNode(const UChar *units, int32_t len, Node *nextNode);
149  virtual UBool operator==(const Node &other) const;
150  virtual void write(StringTrieBuilder &builder);
151  private:
152  const UChar *s;
153  };
154 #endif
155 
156  virtual Node *createLinearMatchNode(int32_t i, int32_t unitIndex, int32_t length,
157  Node *nextNode) const;
158 
159  UBool ensureCapacity(int32_t length);
160  virtual int32_t write(int32_t unit);
161  int32_t write(const UChar *s, int32_t length);
162  virtual int32_t writeElementUnits(int32_t i, int32_t unitIndex, int32_t length);
163  virtual int32_t writeValueAndFinal(int32_t i, UBool isFinal);
164  virtual int32_t writeValueAndType(UBool hasValue, int32_t value, int32_t node);
165  virtual int32_t writeDeltaTo(int32_t jumpTarget);
166 
167  UnicodeString strings;
168  UCharsTrieElement *elements;
169  int32_t elementsCapacity;
170  int32_t elementsLength;
171 
172  // UChar serialization of the trie.
173  // Grows from the back: ucharsLength measures from the end of the buffer!
174  UChar *uchars;
175  int32_t ucharsCapacity;
176  int32_t ucharsLength;
177 };
178 
180 
181 #endif // __UCHARSTRIEBUILDER_H__