ICU 65.1: ucharstriebuilder.h Source File

00001 // © 2016 and later: Unicode, Inc. and others.
00002 // License & terms of use: http://www.unicode.org/copyright.html
00003 /*
00004 *******************************************************************************
00005 *   Copyright (C) 2010-2016, International Business Machines
00006 *   Corporation and others.  All Rights Reserved.
00007 *******************************************************************************
00008 *   file name:  ucharstriebuilder.h
00009 *   encoding:   UTF-8
00010 *   tab size:   8 (not used)
00011 *   indentation:4
00012 *
00013 *   created on: 2010nov14
00014 *   created by: Markus W. Scherer
00015 */
00016 
00017 #ifndef __UCHARSTRIEBUILDER_H__
00018 #define __UCHARSTRIEBUILDER_H__
00019 
00020 #include "unicode/utypes.h"
00021 
00022 #if U_SHOW_CPLUSPLUS_API
00023 
00024 #include "unicode/stringtriebuilder.h"
00025 #include "unicode/ucharstrie.h"
00026 #include "unicode/unistr.h"
00027 
00033 U_NAMESPACE_BEGIN
00034 
00035 class UCharsTrieElement;
00036 
00043 class U_COMMON_API UCharsTrieBuilder : public StringTrieBuilder {
00044 public:
00050     UCharsTrieBuilder(UErrorCode &errorCode);
00051 
00056     virtual ~UCharsTrieBuilder();
00057 
00072     UCharsTrieBuilder &add(const UnicodeString &s, int32_t value, UErrorCode &errorCode);
00073 
00092     UCharsTrie *build(UStringTrieBuildOption buildOption, UErrorCode &errorCode);
00093 
00118     UnicodeString &buildUnicodeString(UStringTrieBuildOption buildOption, UnicodeString &result,
00119                                       UErrorCode &errorCode);
00120 
00127     UCharsTrieBuilder &clear() {
00128         strings.remove();
00129         elementsLength=0;
00130         ucharsLength=0;
00131         return *this;
00132     }
00133 
00134 private:
00135     UCharsTrieBuilder(const UCharsTrieBuilder &other);  // no copy constructor
00136     UCharsTrieBuilder &operator=(const UCharsTrieBuilder &other);  // no assignment operator
00137 
00138     void buildUChars(UStringTrieBuildOption buildOption, UErrorCode &errorCode);
00139 
00140     virtual int32_t getElementStringLength(int32_t i) const;
00141     virtual char16_t getElementUnit(int32_t i, int32_t unitIndex) const;
00142     virtual int32_t getElementValue(int32_t i) const;
00143 
00144     virtual int32_t getLimitOfLinearMatch(int32_t first, int32_t last, int32_t unitIndex) const;
00145 
00146     virtual int32_t countElementUnits(int32_t start, int32_t limit, int32_t unitIndex) const;
00147     virtual int32_t skipElementsBySomeUnits(int32_t i, int32_t unitIndex, int32_t count) const;
00148     virtual int32_t indexOfElementWithNextUnit(int32_t i, int32_t unitIndex, char16_t unit) const;
00149 
00150     virtual UBool matchNodesCanHaveValues() const { return TRUE; }
00151 
00152     virtual int32_t getMaxBranchLinearSubNodeLength() const { return UCharsTrie::kMaxBranchLinearSubNodeLength; }
00153     virtual int32_t getMinLinearMatch() const { return UCharsTrie::kMinLinearMatch; }
00154     virtual int32_t getMaxLinearMatchLength() const { return UCharsTrie::kMaxLinearMatchLength; }
00155 
00156     class UCTLinearMatchNode : public LinearMatchNode {
00157     public:
00158         UCTLinearMatchNode(const char16_t *units, int32_t len, Node *nextNode);
00159         virtual UBool operator==(const Node &other) const;
00160         virtual void write(StringTrieBuilder &builder);
00161     private:
00162         const char16_t *s;
00163     };
00164 
00165     virtual Node *createLinearMatchNode(int32_t i, int32_t unitIndex, int32_t length,
00166                                         Node *nextNode) const;
00167 
00168     UBool ensureCapacity(int32_t length);
00169     virtual int32_t write(int32_t unit);
00170     int32_t write(const char16_t *s, int32_t length);
00171     virtual int32_t writeElementUnits(int32_t i, int32_t unitIndex, int32_t length);
00172     virtual int32_t writeValueAndFinal(int32_t i, UBool isFinal);
00173     virtual int32_t writeValueAndType(UBool hasValue, int32_t value, int32_t node);
00174     virtual int32_t writeDeltaTo(int32_t jumpTarget);
00175 
00176     UnicodeString strings;
00177     UCharsTrieElement *elements;
00178     int32_t elementsCapacity;
00179     int32_t elementsLength;
00180 
00181     // char16_t serialization of the trie.
00182     // Grows from the back: ucharsLength measures from the end of the buffer!
00183     char16_t *uchars;
00184     int32_t ucharsCapacity;
00185     int32_t ucharsLength;
00186 };
00187 
00188 U_NAMESPACE_END
00189 
00190 #endif /* U_SHOW_CPLUSPLUS_API */
00191 
00192 #endif  // __UCHARSTRIEBUILDER_H__