430 lines
13 KiB
C++
430 lines
13 KiB
C++
// © 2016 and later: Unicode, Inc. and others.
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// License & terms of use: http://www.unicode.org/copyright.html
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/**
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*******************************************************************************
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* Copyright (C) 2006-2014, International Business Machines Corporation *
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* and others. All Rights Reserved. *
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*******************************************************************************
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*/
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#ifndef DICTBE_H
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#define DICTBE_H
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#include "unicode/utypes.h"
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#include "unicode/uniset.h"
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#include "unicode/utext.h"
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#include "brkeng.h"
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#include "hash.h"
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#include "uvectr32.h"
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U_NAMESPACE_BEGIN
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class DictionaryMatcher;
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class Normalizer2;
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/*******************************************************************
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* DictionaryBreakEngine
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*/
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/**
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* <p>DictionaryBreakEngine is a kind of LanguageBreakEngine that uses a
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* dictionary to determine language-specific breaks.</p>
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*
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* <p>After it is constructed a DictionaryBreakEngine may be shared between
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* threads without synchronization.</p>
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*/
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class DictionaryBreakEngine : public LanguageBreakEngine {
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private:
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/**
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* The set of characters handled by this engine
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* @internal
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*/
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UnicodeSet fSet;
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public:
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/**
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* <p>Constructor </p>
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*/
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DictionaryBreakEngine();
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/**
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* <p>Virtual destructor.</p>
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*/
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virtual ~DictionaryBreakEngine();
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/**
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* <p>Indicate whether this engine handles a particular character for
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* a particular kind of break.</p>
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*
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* @param c A character which begins a run that the engine might handle
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* @return true if this engine handles the particular character and break
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* type.
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*/
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virtual UBool handles(UChar32 c) const override;
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/**
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* <p>Find any breaks within a run in the supplied text.</p>
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*
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* @param text A UText representing the text. The iterator is left at
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* the end of the run of characters which the engine is capable of handling
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* that starts from the first character in the range.
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* @param startPos The start of the run within the supplied text.
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* @param endPos The end of the run within the supplied text.
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* @param foundBreaks vector of int32_t to receive the break positions
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* @param status Information on any errors encountered.
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* @return The number of breaks found.
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*/
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virtual int32_t findBreaks( UText *text,
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int32_t startPos,
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int32_t endPos,
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UVector32 &foundBreaks,
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UBool isPhraseBreaking,
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UErrorCode& status ) const override;
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protected:
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/**
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* <p>Set the character set handled by this engine.</p>
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*
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* @param set A UnicodeSet of the set of characters handled by the engine
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*/
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virtual void setCharacters( const UnicodeSet &set );
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/**
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* <p>Divide up a range of known dictionary characters handled by this break engine.</p>
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*
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* @param text A UText representing the text
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* @param rangeStart The start of the range of dictionary characters
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* @param rangeEnd The end of the range of dictionary characters
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* @param foundBreaks Output of C array of int32_t break positions, or 0
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* @param status Information on any errors encountered.
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* @return The number of breaks found
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*/
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virtual int32_t divideUpDictionaryRange( UText *text,
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int32_t rangeStart,
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int32_t rangeEnd,
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UVector32 &foundBreaks,
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UBool isPhraseBreaking,
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UErrorCode& status) const = 0;
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};
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/*******************************************************************
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* ThaiBreakEngine
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*/
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/**
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* <p>ThaiBreakEngine is a kind of DictionaryBreakEngine that uses a
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* dictionary and heuristics to determine Thai-specific breaks.</p>
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*
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* <p>After it is constructed a ThaiBreakEngine may be shared between
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* threads without synchronization.</p>
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*/
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class ThaiBreakEngine : public DictionaryBreakEngine {
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private:
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/**
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* The set of characters handled by this engine
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* @internal
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*/
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UnicodeSet fEndWordSet;
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UnicodeSet fBeginWordSet;
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UnicodeSet fSuffixSet;
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UnicodeSet fMarkSet;
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DictionaryMatcher *fDictionary;
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public:
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/**
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* <p>Default constructor.</p>
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*
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* @param adoptDictionary A DictionaryMatcher to adopt. Deleted when the
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* engine is deleted.
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*/
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ThaiBreakEngine(DictionaryMatcher *adoptDictionary, UErrorCode &status);
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/**
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* <p>Virtual destructor.</p>
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*/
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virtual ~ThaiBreakEngine();
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protected:
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/**
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* <p>Divide up a range of known dictionary characters handled by this break engine.</p>
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*
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* @param text A UText representing the text
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* @param rangeStart The start of the range of dictionary characters
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* @param rangeEnd The end of the range of dictionary characters
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* @param foundBreaks Output of C array of int32_t break positions, or 0
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* @param status Information on any errors encountered.
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* @return The number of breaks found
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*/
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virtual int32_t divideUpDictionaryRange( UText *text,
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int32_t rangeStart,
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int32_t rangeEnd,
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UVector32 &foundBreaks,
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UBool isPhraseBreaking,
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UErrorCode& status) const override;
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};
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/*******************************************************************
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* LaoBreakEngine
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*/
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/**
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* <p>LaoBreakEngine is a kind of DictionaryBreakEngine that uses a
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* dictionary and heuristics to determine Lao-specific breaks.</p>
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*
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* <p>After it is constructed a LaoBreakEngine may be shared between
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* threads without synchronization.</p>
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*/
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class LaoBreakEngine : public DictionaryBreakEngine {
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private:
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/**
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* The set of characters handled by this engine
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* @internal
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*/
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UnicodeSet fEndWordSet;
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UnicodeSet fBeginWordSet;
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UnicodeSet fMarkSet;
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DictionaryMatcher *fDictionary;
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public:
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/**
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* <p>Default constructor.</p>
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*
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* @param adoptDictionary A DictionaryMatcher to adopt. Deleted when the
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* engine is deleted.
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*/
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LaoBreakEngine(DictionaryMatcher *adoptDictionary, UErrorCode &status);
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/**
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* <p>Virtual destructor.</p>
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*/
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virtual ~LaoBreakEngine();
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protected:
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/**
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* <p>Divide up a range of known dictionary characters handled by this break engine.</p>
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*
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* @param text A UText representing the text
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* @param rangeStart The start of the range of dictionary characters
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* @param rangeEnd The end of the range of dictionary characters
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* @param foundBreaks Output of C array of int32_t break positions, or 0
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* @param status Information on any errors encountered.
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* @return The number of breaks found
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*/
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virtual int32_t divideUpDictionaryRange( UText *text,
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int32_t rangeStart,
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int32_t rangeEnd,
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UVector32 &foundBreaks,
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UBool isPhraseBreaking,
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UErrorCode& status) const override;
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};
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/*******************************************************************
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* BurmeseBreakEngine
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*/
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/**
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* <p>BurmeseBreakEngine is a kind of DictionaryBreakEngine that uses a
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* DictionaryMatcher and heuristics to determine Burmese-specific breaks.</p>
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*
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* <p>After it is constructed a BurmeseBreakEngine may be shared between
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* threads without synchronization.</p>
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*/
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class BurmeseBreakEngine : public DictionaryBreakEngine {
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private:
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/**
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* The set of characters handled by this engine
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* @internal
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*/
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UnicodeSet fEndWordSet;
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UnicodeSet fBeginWordSet;
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UnicodeSet fMarkSet;
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DictionaryMatcher *fDictionary;
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public:
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/**
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* <p>Default constructor.</p>
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*
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* @param adoptDictionary A DictionaryMatcher to adopt. Deleted when the
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* engine is deleted.
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*/
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BurmeseBreakEngine(DictionaryMatcher *adoptDictionary, UErrorCode &status);
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/**
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* <p>Virtual destructor.</p>
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*/
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virtual ~BurmeseBreakEngine();
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protected:
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/**
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* <p>Divide up a range of known dictionary characters.</p>
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*
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* @param text A UText representing the text
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* @param rangeStart The start of the range of dictionary characters
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* @param rangeEnd The end of the range of dictionary characters
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* @param foundBreaks Output of C array of int32_t break positions, or 0
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* @param status Information on any errors encountered.
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* @return The number of breaks found
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*/
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virtual int32_t divideUpDictionaryRange( UText *text,
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int32_t rangeStart,
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int32_t rangeEnd,
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UVector32 &foundBreaks,
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UBool isPhraseBreaking,
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UErrorCode& status) const override;
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};
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/*******************************************************************
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* KhmerBreakEngine
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*/
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/**
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* <p>KhmerBreakEngine is a kind of DictionaryBreakEngine that uses a
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* DictionaryMatcher and heuristics to determine Khmer-specific breaks.</p>
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*
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* <p>After it is constructed a KhmerBreakEngine may be shared between
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* threads without synchronization.</p>
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*/
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class KhmerBreakEngine : public DictionaryBreakEngine {
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private:
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/**
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* The set of characters handled by this engine
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* @internal
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*/
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UnicodeSet fEndWordSet;
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UnicodeSet fBeginWordSet;
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UnicodeSet fMarkSet;
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DictionaryMatcher *fDictionary;
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public:
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/**
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* <p>Default constructor.</p>
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*
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* @param adoptDictionary A DictionaryMatcher to adopt. Deleted when the
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* engine is deleted.
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*/
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KhmerBreakEngine(DictionaryMatcher *adoptDictionary, UErrorCode &status);
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/**
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* <p>Virtual destructor.</p>
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*/
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virtual ~KhmerBreakEngine();
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protected:
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/**
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* <p>Divide up a range of known dictionary characters.</p>
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*
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* @param text A UText representing the text
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* @param rangeStart The start of the range of dictionary characters
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* @param rangeEnd The end of the range of dictionary characters
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* @param foundBreaks Output of C array of int32_t break positions, or 0
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* @param status Information on any errors encountered.
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* @return The number of breaks found
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*/
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virtual int32_t divideUpDictionaryRange( UText *text,
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int32_t rangeStart,
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int32_t rangeEnd,
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UVector32 &foundBreaks,
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UBool isPhraseBreaking,
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UErrorCode& status) const override;
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};
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#if !UCONFIG_NO_NORMALIZATION
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/*******************************************************************
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* CjkBreakEngine
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*/
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//indicates language/script that the CjkBreakEngine will handle
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enum LanguageType {
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kKorean,
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kChineseJapanese
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};
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/**
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* <p>CjkBreakEngine is a kind of DictionaryBreakEngine that uses a
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* dictionary with costs associated with each word and
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* Viterbi decoding to determine CJK-specific breaks.</p>
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*/
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class CjkBreakEngine : public DictionaryBreakEngine {
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protected:
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/**
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* The set of characters handled by this engine
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* @internal
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*/
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UnicodeSet fHangulWordSet;
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UnicodeSet fDigitOrOpenPunctuationOrAlphabetSet;
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UnicodeSet fClosePunctuationSet;
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DictionaryMatcher *fDictionary;
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const Normalizer2 *nfkcNorm2;
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private:
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// Load Japanese extensions.
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void loadJapaneseExtensions(UErrorCode& error);
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// Load Japanese Hiragana.
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void loadHiragana(UErrorCode& error);
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// Initialize fSkipSet by loading Japanese Hiragana and extensions.
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void initJapanesePhraseParameter(UErrorCode& error);
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Hashtable fSkipSet;
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public:
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/**
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* <p>Default constructor.</p>
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*
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* @param adoptDictionary A DictionaryMatcher to adopt. Deleted when the
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* engine is deleted. The DictionaryMatcher must contain costs for each word
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* in order for the dictionary to work properly.
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*/
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CjkBreakEngine(DictionaryMatcher *adoptDictionary, LanguageType type, UErrorCode &status);
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/**
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* <p>Virtual destructor.</p>
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*/
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virtual ~CjkBreakEngine();
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protected:
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/**
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* <p>Divide up a range of known dictionary characters handled by this break engine.</p>
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*
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* @param text A UText representing the text
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* @param rangeStart The start of the range of dictionary characters
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* @param rangeEnd The end of the range of dictionary characters
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* @param foundBreaks Output of C array of int32_t break positions, or 0
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* @param status Information on any errors encountered.
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* @return The number of breaks found
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*/
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virtual int32_t divideUpDictionaryRange( UText *text,
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int32_t rangeStart,
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int32_t rangeEnd,
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UVector32 &foundBreaks,
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UBool isPhraseBreaking,
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UErrorCode& status) const override;
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};
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#endif
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U_NAMESPACE_END
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/* DICTBE_H */
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#endif
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