337 lines
10 KiB
C++
337 lines
10 KiB
C++
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//+---------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 2000.
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//
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// File: YYBase.cxx
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//
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// Contents: Custom base class for YYPARSER
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//
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// History: 18-Apr-2000 KitmanH Created
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//
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//----------------------------------------------------------------------------
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#pragma hdrstop
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#include "yybase.hxx"
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#include "parser.h"
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#include "flexcpp.h"
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#include "parsepl.h"
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void StripQuotes(WCHAR *wcsPhrase);
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//+-------------------------------------------------------------------------
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//
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// Member: CTripYYBase::CTripYYBase, public
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//
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// Synopsis: Constructor
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//
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// Arguments: [ColumnMapper] -- Column Mapper
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// [locale] -- locale
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// [yylex] -- Lexer
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//
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// History: 18-Apr-2000 KitmanH Created
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//
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//--------------------------------------------------------------------------
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CTripYYBase::CTripYYBase( IColumnMapper & ColumnMapper,
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LCID & locale,
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YYLEXER & yylex )
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: _yylex( yylex ),
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_ColumnMapper(ColumnMapper),
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_lcid(locale)
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{
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InitState();
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fDeferredPop = FALSE;
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}
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//+-------------------------------------------------------------------------
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//
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// Member: CTripYYBase::~CTripYYBase, public
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//
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// Synopsis: Destructor
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//
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// History: 18-Apr-2000 KitmanH Created
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//
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//--------------------------------------------------------------------------
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CTripYYBase::~CTripYYBase()
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{
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}
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//+-------------------------------------------------------------------------
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//
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// Member: CTripYYBase::yyprimebuffer, public
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//
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// Synopsis: Prime lexer with text (passthrough to lexer)
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//
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// Arguments: [pszBuffer] -- Buffer
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//
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// History: 18-Apr-2000 KitmanH Moved from YYPARSER
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//
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//--------------------------------------------------------------------------
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void CTripYYBase::yyprimebuffer(const YY_CHAR *pszBuffer)
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{
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_yylex.yyprimebuffer(pszBuffer);
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}
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//+-------------------------------------------------------------------------
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//
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// Member: CTripYYBase::triperror, protected
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//
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// Synopsis: Report parsing errors
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//
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// Arguments: [szError] -- Error string
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//
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// History: 18-Apr-2000 KitmanH Moved from YYPARSER
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//
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//--------------------------------------------------------------------------
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void CTripYYBase::triperror( char const * szError )
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{
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}
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//+-------------------------------------------------------------------------
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//
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// Member: CTripYYBase::InitState, public
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//
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// Synopsis: Initialize property and generate method
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//
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// History: 01-Oct-1997 emilyb created
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// 18-Apr-2000 KitmanH Moved from YYPARSER
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//
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//--------------------------------------------------------------------------
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void CTripYYBase::InitState(void)
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{
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// Push makes a copy of what is passed in.
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PushProperty(L"contents");
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_currentState.iGenerateMethod = GENERATE_METHOD_EXACT;
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// We don't use xwszPropName field of _currentState. Instead,
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// we use the prop name stack to get the appropriate propname.
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CTripYYBase::GetCurrentProperty, public
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//
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// Synopsis: Return info on current prop
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//
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// Arguments: [pp_ps] -- filled with CDbColId * for current prop
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// [dbType] -- set to DBTYPE for current prop
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//
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// History: 01-Oct-1997 emilyb created
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// 10-Apr-1999 KrishnaN Modified to use stack
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// 18-Apr-2000 KitmanH Moved from YYPARSER
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//
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//----------------------------------------------------------------------------
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void CTripYYBase::GetCurrentProperty(CDbColId ** pp_ps, DBTYPE *dbType)
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{
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// Get the top most property off of the stack and use it
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if ( S_OK != _ColumnMapper.GetPropInfoFromName(
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_propNameStack.Get(_propNameStack.Count() - 1),
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(DBID **) pp_ps,
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dbType,
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0 ) )
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THROW( CParserException( QPARSE_E_NO_SUCH_PROPERTY ) );
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CTripYYBase::PushProperty, public
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//
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// Synopsis: Pushes current property onto stack.
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//
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// Arguments: [pwszProperty] - property
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//
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// History: 01-Apr-1998 KrishnaN created
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// 18-Apr-2000 KitmanH Moved from YYPARSER
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//
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//----------------------------------------------------------------------------
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void CTripYYBase::PushProperty( WCHAR const * wszProperty)
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{
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// Make a copy and save it. The copy will be automatically deleted
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// when the stack self destructs.
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int iLen = wcslen(wszProperty) + 1;
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XPtrST<WCHAR> xwszPropertyCopy(new WCHAR[iLen]);
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RtlCopyMemory(xwszPropertyCopy.GetPointer(), wszProperty, sizeof(WCHAR) * iLen);
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_propNameStack.Push(xwszPropertyCopy.GetPointer());
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xwszPropertyCopy.Acquire();
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CTripYYBase::PopProperty, public
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//
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// Synopsis: Pops the current property off the stack
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//
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// History: 10-Apr-1998 KrishnaN created
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// 18-Apr-2000 KitmanH Moved from YYPARSER
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//
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//----------------------------------------------------------------------------
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void CTripYYBase::PopProperty(void)
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{
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// pop the property name off of the stack and delete it
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delete _propNameStack.Pop();
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CTripYYBase::SetCurrentGenerate, public
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//
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// Synopsis: Sets current generate method
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//
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// Arguments: [iGenerateMethod] - generate method
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//
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// History: 01-Oct-1997 emilyb created
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// 18-Apr-2000 KitmanH Moved from YYPARSER
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//
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//----------------------------------------------------------------------------
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void CTripYYBase::SetCurrentGenerate(int iGenerateMethod)
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{
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_currentState.iGenerateMethod = iGenerateMethod;
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CTripYYBase::GetCurrentGenerate, public
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//
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// Synopsis: Return info on current generate method
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//
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// Arguments: [iGenerateMethod] -- set to current generate method
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//
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// History: 01-Oct-1997 emilyb created
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// 18-Apr-2000 KitmanH Moved from YYPARSER
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//
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//----------------------------------------------------------------------------
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void CTripYYBase::GetCurrentGenerate(int *iGenerateMethod)
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{
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*iGenerateMethod = _currentState.iGenerateMethod;
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CTripYYBase::SaveState, public
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//
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// Synopsis: Saves current state on state stack, and inits new state
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//
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// History: 01-Oct-1997 emilyb created
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// 18-Apr-2000 KitmanH Moved from YYPARSER
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//
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//----------------------------------------------------------------------------
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void CTripYYBase::SaveState(void)
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{
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XPtr <STATE> xState( new STATE );
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xState.GetPointer()->iGenerateMethod = _currentState.iGenerateMethod;
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// When you save the state, pop the propname off of the
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// stack and save the ptr.
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xState.GetPointer()->xwszPropName.Set( _propNameStack.Pop() );
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_savedStates.Push( xState.GetPointer() );
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xState.Acquire();
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InitState();
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CTripYYBase::RestoreState, public
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//
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// Synopsis: Restores state from state stack
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//
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// History: 01-Oct-1997 emilyb created
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// 18-Apr-2000 KitmanH Moved from YYPARSER
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//
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//----------------------------------------------------------------------------
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void CTripYYBase::RestoreState(void)
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{
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XPtr <STATE> xState (_savedStates.Pop());
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_currentState.iGenerateMethod = xState.GetPointer()->iGenerateMethod;
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Win4Assert(xState.GetPointer()->xwszPropName.GetPointer());
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// Push the saved state onto the stack
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_propNameStack.Push(xState.GetPointer()->xwszPropName.GetPointer());
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xState.GetPointer()->xwszPropName.Acquire();
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CTripYYBase::BuildPhrase
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//
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// Synopsis: Builds a phrase node.
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//
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// Arguments: [wcsPhrase] - The phrase
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// [iGenMethod] - The generation method
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//
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// History: 01-Apr-1998 KrishnaN created
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// 18-Apr-2000 KitmanH Moved from YYPARSER
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//
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//----------------------------------------------------------------------------
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CDbContentRestriction * CTripYYBase::BuildPhrase(WCHAR *wcsPhrase, int iGenMethod)
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{
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Win4Assert(wcsPhrase);
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if (0 == *wcsPhrase)
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THROW( CException( QPARSE_E_EXPECTING_PHRASE ) );
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CDbColId *pps;
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DBTYPE dbType;
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GetCurrentProperty(&pps, &dbType);
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// We used the property. Now pop it off if need be
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if (fDeferredPop)
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PopProperty();
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// generation method stripped in some cases, but not all.
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// if it's there, use it
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LPWSTR pLast = wcsPhrase + wcslen(wcsPhrase) - 1;
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if (L'"' == *wcsPhrase && L'"' == *pLast)
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{
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StripQuotes(wcsPhrase);
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if (0 == *wcsPhrase)
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THROW( CException( QPARSE_E_EXPECTING_PHRASE ) );
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}
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else
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{
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if ( L'*' == *pLast) // prefix
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{
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*pLast-- = L'\0';
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SetCurrentGenerate(GENERATE_METHOD_PREFIX);
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}
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if ( L'*' == *pLast) // inflect
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{
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*pLast-- = L'\0';
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SetCurrentGenerate(GENERATE_METHOD_INFLECT);
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}
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}
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int fuzzy;
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GetCurrentGenerate(&fuzzy);
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if (0 != iGenMethod)
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fuzzy = iGenMethod;
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// Clear generation method so it won't rub off on the following phrase
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SetCurrentGenerate(GENERATE_METHOD_EXACT);
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XDbContentRestriction pRest( new CDbContentRestriction (wcsPhrase, *pps, fuzzy, _lcid));
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if( pRest.IsNull() || !pRest->IsValid() )
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THROW( CException( E_OUTOFMEMORY ) );
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return pRest.Acquire();
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}
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