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290 lines
8.1 KiB
290 lines
8.1 KiB
//+-------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1994 - 2000.
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//
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// File: colmastr.cxx
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//
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// Contents: Classes dealing with the table master column description.
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//
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// Classes: CColumnMasterDesc - A master column description
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// CColumnMasterArray - A simple array of master columns
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// CColumnMasterSet - An managed set of master columns
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//
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// Functions:
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//
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// History: 28 Feb 1994 AlanW Created
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//
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//--------------------------------------------------------------------------
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#include "pch.cxx"
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#pragma hdrstop
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#include <tablecol.hxx>
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#include <coldesc.hxx>
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#include "tabledbg.hxx"
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#include "colcompr.hxx"
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#include "propdata.hxx"
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//
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// Generate the implementation of the master set base class
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//
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IMPL_DYNARRAY( CColumnMasterArray, CColumnMasterDesc )
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//+-------------------------------------------------------------------------
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//
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// Member: CColumnMasterSet::CColumnMasterSet, public
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//
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// Synopsis: Constructor for a master column set.
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//
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// Arguments: [pcol] -- A description of the initial output column set
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//
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// Notes:
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//
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//--------------------------------------------------------------------------
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CColumnMasterSet::CColumnMasterSet( const CColumnSet * const pcol )
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: _iNextFree( 0 ),
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_aMasterCol( pcol->Size() ),
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_fHasUserProp( FALSE )
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{
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for (unsigned iCol = 0; iCol< pcol->Size(); iCol++)
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{
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PROPID pid = pcol->Get(iCol);
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if ( IsUserDefinedPid( pid ) )
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_fHasUserProp = TRUE;
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CColumnMasterDesc MasterCol( pid );
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Add( MasterCol );
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}
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}
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//+-------------------------------------------------------------------------
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//
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// Member: CColumnMasterSet::Find, private
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//
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// Synopsis: Find a master column description in a master column set.
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//
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// Arguments: [propid] -- The property ID of the column to be located
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// [riPos] -- If found, returns the position of the column
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// description in the dynamic array.
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//
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// Returns: CColumnMasterDesc* - a pointer to the master column
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// description if found, otherwise NULL
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//
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// Notes:
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//
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//--------------------------------------------------------------------------
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inline CColumnMasterDesc *
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CColumnMasterSet::Find( const PROPID propid, unsigned& riCol )
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{
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Win4Assert(_iNextFree <= Size());
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for (riCol = 0; riCol < _iNextFree; riCol++) {
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if (_aMasterCol.Get(riCol)->PropId == propid)
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return _aMasterCol.Get(riCol);
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}
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return NULL;
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}
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//+-------------------------------------------------------------------------
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//
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// Member: CColumnMasterSet::Find, public
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//
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// Synopsis: Find a master column description in a master column set.
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//
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// Arguments: [propid] -- The property ID of the column to be located
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//
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// Returns: CColumnMasterDesc* - a pointer to the master column
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// description if found, otherwise NULL
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//
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// Notes:
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//
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//--------------------------------------------------------------------------
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CColumnMasterDesc*
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CColumnMasterSet::Find( const PROPID propid )
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{
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unsigned iCol;
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return Find(propid, iCol);
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}
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//+-------------------------------------------------------------------------
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//
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// Member: CColumnMasterSet::Add, public
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//
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// Synopsis: Add a master column description to a master column set.
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//
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// Arguments: [xpNewCol] -- A reference to the column description to be
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// added.
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//
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// Returns: CColumnMasterDesc* - a pointer to the master column
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// description added
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//
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// Notes: If a property description with the same property ID
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// is already in the column set, the new column is not
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// added, but the previous column is used.
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//
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//--------------------------------------------------------------------------
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CColumnMasterDesc*
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CColumnMasterSet::Add( XPtr<CColumnMasterDesc> & xpNewCol )
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{
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CColumnMasterDesc* pCol = Find(xpNewCol->PropId);
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if ( 0 != pCol )
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return pCol;
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//
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// Column was not found in the existing set, add it.
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//
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unsigned iCol = _iNextFree++;
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if (iCol >= _aMasterCol.Size())
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_aMasterCol.Add(0, iCol); // force the array to grow
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_aMasterCol.Add(xpNewCol.Acquire(), iCol);
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return _aMasterCol.Get(iCol);
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}
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CColumnMasterDesc*
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CColumnMasterSet::Add( CColumnMasterDesc const & rColDesc )
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{
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CColumnMasterDesc* pCol = Find(rColDesc.PropId);
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if ( 0 != pCol )
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return pCol;
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//
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// Column was not found in the existing set, add it.
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//
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// PERFFIX: to avoid the compression restriction, use the method above.
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Win4Assert(! rColDesc.IsCompressedCol() );
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CColumnMasterDesc* pNewCol = new CColumnMasterDesc;
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XPtr<CColumnMasterDesc> xCol( pNewCol );
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*pNewCol = rColDesc;
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unsigned iCol = _iNextFree++;
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_aMasterCol.Add(pNewCol, iCol);
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xCol.Acquire();
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return _aMasterCol.Get(iCol);
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}
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//+-------------------------------------------------------------------------
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//
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// Member: CColumnMasterDesc::CColumnMasterDesc, public
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//
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// Synopsis: Constructor for a master column description.
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//
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// Arguments: [PropertyId] -- the PROPID for the column
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// [DataTyp] -- data type of column
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//
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// Notes:
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//
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//--------------------------------------------------------------------------
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CColumnMasterDesc::CColumnMasterDesc( PROPID PropertyId,
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VARTYPE DataTyp)
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: PropId( PropertyId ),
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DataType( DataTyp ),
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_cbData( 0 ),
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_fComputedProperty( FALSE ),
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_PredominantType( VT_EMPTY ),
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_fUniformType( TRUE ),
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_fNotVariantType (FALSE),
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_pCompression( NULL ),
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_CompressMasterID( 0 )
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{
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if ( DataType == VT_EMPTY )
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{
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DataType = PropIdToType( PropId );
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}
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}
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//+-------------------------------------------------------------------------
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//
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// Member: CColumnMasterDesc::CColumnMasterDesc, public
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//
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// Synopsis: Constructor for a master column description from a
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// sort key description.
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//
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// Arguments: [rSortKey] -- A description of a sort key
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//
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// Notes:
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//
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//--------------------------------------------------------------------------
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CColumnMasterDesc::CColumnMasterDesc( SSortKey& rSortKey )
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: PropId( rSortKey.pidColumn ),
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DataType( PropIdToType(rSortKey.pidColumn) ),
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_cbData( 0 ),
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_fComputedProperty( FALSE ),
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_PredominantType( VT_EMPTY ),
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_fUniformType( TRUE ),
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_fNotVariantType (FALSE),
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_pCompression( NULL ),
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_CompressMasterID( 0 )
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{
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}
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//+-------------------------------------------------------------------------
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//
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// Member: CColumnMasterDesc::~CColumnMasterDesc, public
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//
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// Synopsis: Destructor for a master column description.
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//
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// Notes:
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//
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//--------------------------------------------------------------------------
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CColumnMasterDesc::~CColumnMasterDesc( )
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{
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if (_pCompression && _CompressMasterID == 0)
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delete _pCompression;
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}
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//+-------------------------------------------------------------------------
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//
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// Member: CColumnMasterDesc::SetCompression, public
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//
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// Synopsis: Install a global compression for a master column.
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//
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// Arguments: [pCompr] -- A pointer to the compressor for the
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// column
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// [SharedID] -- If non-zero, the master column ID
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// for a shared compression.
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//
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// Notes:
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//
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//--------------------------------------------------------------------------
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VOID
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CColumnMasterDesc::SetCompression(
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CCompressedCol* pCompr,
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PROPID SharedID
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) {
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if (_pCompression && _CompressMasterID == 0)
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delete _pCompression;
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_pCompression = pCompr;
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_CompressMasterID = SharedID;
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}
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