244 lines
7.8 KiB
C++
244 lines
7.8 KiB
C++
//+---------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1991 - 1998.
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//
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// File: LANG.HXX
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//
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// Contents: Language support
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//
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// Classes: CLanguage, CLangList
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//
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// History: 02-May-91 BartoszM Created
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//
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//----------------------------------------------------------------------------
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#pragma once
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#include <ciintf.h>
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#include <regacc.hxx>
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#include <twidhash.hxx>
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const MAX_REG_STR_LEN = 150;
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const INIT_PID_HASH_TABLE_SIZE = 257;
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const INIT_LANGUAGES_COUNT = 7;
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const USE_WB_DEFAULT_PID = 0x0001;
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const USE_STEMMER_DEFAULT_PID = 0x0002;
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const USE_NWL_DEFAULT_PID = 0x0004;
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const USE_DEFAULT_PID = USE_WB_DEFAULT_PID | USE_STEMMER_DEFAULT_PID | USE_NWL_DEFAULT_PID;
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const LANG_LOAD_WORDBREAKER = 0x1;
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const LANG_LOAD_STEMMER = 0x2;
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const LANG_LOAD_NOISE = 0x4;
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const LANG_LOAD_NO_STEMMER = 0x5;
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const LANG_LOAD_ALL = 0x7;
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inline BOOL LoadWB( ULONG r ) { return ( 0 != ( r & LANG_LOAD_WORDBREAKER ) ); }
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inline BOOL LoadST( ULONG r ) { return ( 0 != ( r & LANG_LOAD_STEMMER ) ); }
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inline BOOL LoadNO( ULONG r ) { return ( 0 != ( r & LANG_LOAD_NOISE ) ); }
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class CKeyMaker;
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class CStringTable;
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class PKeyRepository;
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class CLanguage;
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class CStringTable;
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//+---------------------------------------------------------------------------
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//
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// Class: CLanguage
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//
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// Purpose: Language specific object
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//
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// History: 16-Jul-91 BartoszM Created.
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// 25-Apr-94 KyleP Multi-language support
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//
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//----------------------------------------------------------------------------
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class CLanguage : public CDoubleLink
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{
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public:
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CLanguage( LCID locale,
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PROPID pid,
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XInterface<IWordBreaker> & xWBreak,
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XInterface<IStemmer> & xStemmer,
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XInterface<IStream> & xIStrmNoiseFile );
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virtual ~CLanguage();
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CStringTable * GetNoiseTable() { return _xNoiseTable.GetPointer(); }
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IWordBreaker * GetWordBreaker() { return _xWBreak.GetPointer(); }
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IStemmer * GetStemmer() { return _xStemmer.GetPointer(); }
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LCID Locale() const { return _locale; }
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BOOL IsLocale( LCID locale ) const { return( _locale == locale ); }
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BOOL IsPid( PROPID pid ) const { return( _pid == pid ); }
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BOOL IsZombie() const { return _zombie; }
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void Zombify() { _zombie = TRUE; }
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ULONG LastUsed() const { return _ulLastUsed; }
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void SetLastUsed( ULONG dwTick ) { _ulLastUsed = dwTick; }
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private:
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XPtr<CStringTable> _xNoiseTable;
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XInterface<IWordBreaker> _xWBreak;
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XInterface<IStemmer> _xStemmer;
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XInterface<IStream> _xIStrmNoiseFile;
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ULONG _ulLastUsed;
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LCID _locale;
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PROPID _pid;
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BOOL _zombie;
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};
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//+---------------------------------------------------------------------------
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//
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// Class: CLangDoubleList
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//
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// Purpose: Doubly linked list of language objects
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//
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// History: 14-Sep-91 SitaramR Created.
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//
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//----------------------------------------------------------------------------
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class CLangDoubleList : public CDoubleList
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{
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public:
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CLanguage *Pop() { return (CLanguage *) _Pop(); }
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void Push (CLanguage * pLang) { _Push( pLang ); }
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void Queue (CLanguage * pLang) { _Queue( pLang ); }
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};
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//+---------------------------------------------------------------------------
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//
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// Class: CLangIter
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//
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// Purpose: Iterator over language objects
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//
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// History: 14-Sep-91 SitaramR Created.
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//
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//----------------------------------------------------------------------------
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class CLangIter : public CForwardIter
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{
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public:
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CLangIter ( CLangDoubleList& list ) : CForwardIter( list ) {}
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CLanguage * operator->() { return (CLanguage *) _pLinkCur; }
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CLanguage * GetLang() { return (CLanguage *) _pLinkCur; }
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};
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//+---------------------------------------------------------------------------
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//
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// Class: CLangPidStateInfo
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//
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// Purpose: Maintains state specific information for CLangList::BorrowLang
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//
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// History: 2-27-97 MohamedN Created
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//
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//----------------------------------------------------------------------------
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class CLangPidStateInfo
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{
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public:
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CLangPidStateInfo() : _pidToUse(0), _langIndex(0)
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{
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// trivial consturctor.
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}
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void SetPidFlags(unsigned pidFlag) { _pidToUse |= pidFlag; }
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unsigned GetPidFlags() { return _pidToUse; }
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BOOL IsPidFlagSet( unsigned pidToUse ) { return pidToUse & _pidToUse; }
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void SetLangIndex(unsigned langIndex) { _langIndex = langIndex; }
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unsigned GetLangIndex() { return _langIndex; }
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private:
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unsigned _pidToUse;
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unsigned _langIndex;
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};
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//+---------------------------------------------------------------------------
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//
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// Class: CDefaultPidHash
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//
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// Purpose: Maintains a cache of default pids per langid
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//
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// History: 2-28-97 MohamedN Created
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//
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//----------------------------------------------------------------------------
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class CDefaultPidHash
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{
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public:
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CDefaultPidHash() : _aHashPidTables(INIT_LANGUAGES_COUNT), _aLangId(INIT_LANGUAGES_COUNT), _langIdCount(0)
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{
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// trivial constructor
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}
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BOOL LokLookupOrAddLang( LANGID langid, CLangPidStateInfo & stateInfo );
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BOOL LokIsUseDefaultPid( PROPID pid, unsigned index );
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void LokAddDefaultPid( PROPID pid, unsigned index );
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private:
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typedef TWidHashTable<CWidHashEntry> CPidHash;
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CDynArray<CPidHash> _aHashPidTables;
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CDynArrayInPlace<LANGID> _aLangId;
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unsigned _langIdCount;
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};
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//+---------------------------------------------------------------------------
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//
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// Class: CLangList
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//
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// Purpose: List of language objects
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//
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// History: 02-May-91 BartoszM Created.
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// 05-June-91 t-WadeR changed to use CKeyMaker
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//
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//----------------------------------------------------------------------------
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class CLangList
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{
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public:
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CLangList( ICiCLangRes * pICiCLangRes, ULONG ulMaxIdle = 300 );
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~CLangList();
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CLanguage* BorrowLang ( LCID locale, PROPID pid = 0, ULONG resources = LANG_LOAD_ALL );
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void ReturnLang( CLanguage *lang );
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void InvalidateLangResources();
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void Shutdown();
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BOOL Supports( CLanguage const * pLang, PROPID pid, LCID lcid );
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private:
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CLanguage *FindLangAndActivate( LCID locale, PROPID pid );
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CLanguage * CreateLang ( LANGID langId, PROPID pid, CLangPidStateInfo & stateInfo, CLanguage const * pDup = 0, ULONG resources = LANG_LOAD_ALL );
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IWordBreaker * GetWordBreaker ( LANGID langid, PROPID pid, CLangPidStateInfo & stateInfo, BOOL fCreateDefault );
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IStemmer * GetStemmer ( LANGID langid, PROPID pid, CLangPidStateInfo & stateInfo );
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IStream * GetNoiseWordList ( LANGID langid, PROPID pid, CLangPidStateInfo & stateInfo );
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CMutexSem _mtxList; // serialization for list manipulation
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CMutexSem _mtxCreate; // serialization for language creation
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CLangDoubleList _langsInUse; // Linked list of languages in use
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CLangDoubleList _langsAvailable; // Linked list of languages available
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XInterface<ICiCLangRes> _xICiCLangRes;
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CDefaultPidHash _pidHash;
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ULONG _ulMaxIdle; // Time (in ms Ticks) a language object can sit idle before deletion
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};
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