1// © 2016 and later: Unicode, Inc. and others. 2// License & terms of use: http://www.unicode.org/copyright.html 3// 4// rbbisetb.h 5/* 6********************************************************************** 7* Copyright (c) 2001-2005, International Business Machines 8* Corporation and others. All Rights Reserved. 9********************************************************************** 10*/ 11 12#ifndef RBBISETB_H 13#define RBBISETB_H 14 15#include "unicode/utypes.h" 16 17#if !UCONFIG_NO_BREAK_ITERATION 18 19#include "unicode/uobject.h" 20#include "rbbirb.h" 21#include "utrie2.h" 22#include "uvector.h" 23 24U_NAMESPACE_BEGIN 25 26// 27// RBBISetBuilder Derives the character categories used by the runtime RBBI engine 28// from the Unicode Sets appearing in the source RBBI rules, and 29// creates the TRIE table used to map from Unicode to the 30// character categories. 31// 32 33 34// 35// RangeDescriptor 36// 37// Each of the non-overlapping character ranges gets one of these descriptors. 38// All of them are strung together in a linked list, which is kept in order 39// (by character) 40// 41class RangeDescriptor : public UMemory { 42public: 43 UChar32 fStartChar; // Start of range, unicode 32 bit value. 44 UChar32 fEndChar; // End of range, unicode 32 bit value. 45 int32_t fNum; // runtime-mapped input value for this range. 46 UVector *fIncludesSets; // vector of the the original 47 // Unicode sets that include this range. 48 // (Contains ptrs to uset nodes) 49 RangeDescriptor *fNext; // Next RangeDescriptor in the linked list. 50 51 RangeDescriptor(UErrorCode &status); 52 RangeDescriptor(const RangeDescriptor &other, UErrorCode &status); 53 ~RangeDescriptor(); 54 void split(UChar32 where, UErrorCode &status); // Spit this range in two at "where", with 55 // where appearing in the second (higher) part. 56 void setDictionaryFlag(); // Check whether this range appears as part of 57 // the Unicode set named "dictionary" 58 59private: 60 RangeDescriptor(const RangeDescriptor &other); // forbid copying of this class 61 RangeDescriptor &operator=(const RangeDescriptor &other); // forbid copying of this class 62}; 63 64 65// 66// RBBISetBuilder Handles processing of Unicode Sets from RBBI rules. 67// 68// Starting with the rules parse tree from the scanner, 69// 70// - Enumerate the set of UnicodeSets that are referenced 71// by the RBBI rules. 72// - compute a derived set of non-overlapping UnicodeSets 73// that will correspond to columns in the state table for 74// the RBBI execution engine. 75// - construct the trie table that maps input characters 76// to set numbers in the non-overlapping set of sets. 77// 78 79 80class RBBISetBuilder : public UMemory { 81public: 82 RBBISetBuilder(RBBIRuleBuilder *rb); 83 ~RBBISetBuilder(); 84 85 void build(); 86 void addValToSets(UVector *sets, uint32_t val); 87 void addValToSet (RBBINode *usetNode, uint32_t val); 88 int32_t getNumCharCategories() const; // CharCategories are the same as input symbol set to the 89 // runtime state machine, which are the same as 90 // columns in the DFA state table 91 int32_t getTrieSize() /*const*/; // Size in bytes of the serialized Trie. 92 void serializeTrie(uint8_t *where); // write out the serialized Trie. 93 UChar32 getFirstChar(int32_t val) const; 94 UBool sawBOF() const; // Indicate whether any references to the {bof} pseudo 95 // character were encountered. 96#ifdef RBBI_DEBUG 97 void printSets(); 98 void printRanges(); 99 void printRangeGroups(); 100#else 101 #define printSets() 102 #define printRanges() 103 #define printRangeGroups() 104#endif 105 106private: 107 void numberSets(); 108 109 RBBIRuleBuilder *fRB; // The RBBI Rule Compiler that owns us. 110 UErrorCode *fStatus; 111 112 RangeDescriptor *fRangeList; // Head of the linked list of RangeDescriptors 113 114 UTrie2 *fTrie; // The mapping TRIE that is the end result of processing 115 uint32_t fTrieSize; // the Unicode Sets. 116 117 // Groups correspond to character categories - 118 // groups of ranges that are in the same original UnicodeSets. 119 // fGroupCount is the index of the last used group. 120 // fGroupCount+1 is also the number of columns in the RBBI state table being compiled. 121 // State table column 0 is not used. Column 1 is for end-of-input. 122 // column 2 is for group 0. Funny counting. 123 int32_t fGroupCount; 124 125 UBool fSawBOF; 126 127 RBBISetBuilder(const RBBISetBuilder &other); // forbid copying of this class 128 RBBISetBuilder &operator=(const RBBISetBuilder &other); // forbid copying of this class 129}; 130 131 132 133U_NAMESPACE_END 134 135#endif /* #if !UCONFIG_NO_BREAK_ITERATION */ 136 137#endif 138