129 lines
4.7 KiB
C++
129 lines
4.7 KiB
C++
//
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// rbbisetb.h
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/*
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**********************************************************************
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* Copyright (c) 2001, International Business Machines
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* Corporation and others. All Rights Reserved.
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**********************************************************************
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*/
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#ifndef RBBISETB_H
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#define RBBISETB_H
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#include "unicode/utypes.h"
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#include "unicode/uobject.h"
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#include "rbbirb.h"
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#include "uvector.h"
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#include "uhash.h"
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U_NAMESPACE_BEGIN
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//
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// RBBISetBuilder Derives the character categories used by the runtime RBBI engine
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// from the Unicode Sets appearing in the source RBBI rules, and
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// creates the TRIE table used to map from Unicode to the
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// character categories.
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//
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//
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// RangeDescriptor
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//
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// Each of the non-overlapping character ranges gets one of these descriptors.
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// All of them are strung together in a linked list, which is kept in order
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// (by character)
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//
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struct RangeDescriptor {
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UChar32 fStartChar; // Start of range, unicode 32 bit value.
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UChar32 fEndChar; // End of range, unicode 32 bit value.
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int32_t fNum; // runtime-mapped input value for this range.
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UVector *fIncludesSets; // vector of the the original
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// Unicode sets that include this range.
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// (Contains ptrs to uset nodes)
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RangeDescriptor *fNext; // Next RangeDescriptor in the linked list.
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RangeDescriptor(UErrorCode &status);
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RangeDescriptor(const RangeDescriptor &other, UErrorCode &status);
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~RangeDescriptor();
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void split(UChar32 where, UErrorCode &status); // Spit this range in two at "where", with
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// where appearing in the second (higher) part.
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void setDictionaryFlag(); // Check whether this range appears as part of
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// the Unicode set named "dictionary"
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};
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//
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// RBBISetBuilder Handles processing of Unicode Sets from RBBI rules.
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//
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// Starting with the rules parse tree from the scanner,
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//
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// - Enumerate the set of UnicodeSets that are referenced
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// by the RBBI rules.
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// - compute a derived set of non-overlapping UnicodeSets
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// that will correspond to columns in the state table for
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// the RBBI execution engine.
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// - construct the trie table that maps input characters
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// to set numbers in the non-overlapping set of sets.
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//
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class RBBISetBuilder : public UObject {
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public:
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RBBISetBuilder(RBBIRuleBuilder *rb);
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~RBBISetBuilder();
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void build(); // TODO: needs an out parameter for the TRIE.
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void addValToSets(UVector *sets, uint32_t val);
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int32_t getNumCharCategories(); // CharCategories are the same as input symbol set to the
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// runtime state machine, which are the same as
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// columns in the DFA state table
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int32_t getTrieSize(); // Size in bytes of the serialized Trie.
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void serializeTrie(uint8_t *where); // write out the serialized Trie.
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void printSets();
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void printRanges();
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void printRangeGroups();
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/**
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* ICU "poor man's RTTI", returns a UClassID for the actual class.
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*
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* @draft ICU 2.2
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*/
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virtual inline UClassID getDynamicClassID() const { return getStaticClassID(); }
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/**
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* ICU "poor man's RTTI", returns a UClassID for this class.
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*
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* @draft ICU 2.2
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*/
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static inline UClassID getStaticClassID() { return (UClassID)&fgClassID; }
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private:
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void numberSets();
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RBBIRuleBuilder *fRB; // The RBBI Rule Compiler that owns us.
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UErrorCode *fStatus;
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RangeDescriptor *fRangeList; // Head of the linked list of RangeDescriptors
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UNewTrie *fTrie; // The mapping TRIE that is the end result of processin
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uint32_t fTrieSize; // the Unicode Sets.
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// Groups correspond to character categories -
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// groups of ranges that are in the same original UnicodeSets.
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// fGroupCount is the index of the last used group.
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// The value is also the number of columns in the RBBI state table being compiled.
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// Index 0 is not used. Funny counting.
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int32_t fGroupCount;
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/**
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* The address of this static class variable serves as this class's ID
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* for ICU "poor man's RTTI".
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*/
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static const char fgClassID;
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};
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U_NAMESPACE_END
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#endif
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