138 lines
3.7 KiB
C++
138 lines
3.7 KiB
C++
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//+-------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1994 - 1994.
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//
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// File: tablecur.hxx
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//
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// Contents: Large table cursor definitions
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//
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// Classes: CTableCursor - basic table cursor
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// CTableCursorSet - a set of table cursors
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//
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// Functions:
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//
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// History:
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//
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//--------------------------------------------------------------------------
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#pragma once
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class CTableRowAlloc;
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class CPidRemapper;
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class CTableSource;
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//+---------------------------------------------------------------------------
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//
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// Class: CTableCursor
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//
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// Purpose: A pointer into a large table. Also holds a copy of the
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// column bindings and associated data.
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//
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// Notes:
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//
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// History: 02 Jun 94 AlanW Created
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//
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//----------------------------------------------------------------------------
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class CTableCursor
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{
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friend class CTableCursorSet;
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public:
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CTableCursor( );
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~CTableCursor( void );
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SCODE SetBindings(
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ULONG cbRowLength,
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XPtr<CTableColumnSet> & NewColumns
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);
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//
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// Accessor functions
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//
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USHORT GetRowWidth(void) const
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{ return _cbRowWidth; }
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const CTableColumnSet & GetBindings(void) const {
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return _BoundColumns.GetReference();
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}
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void ValidateBindings() const
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{
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// this should only happen if we've been hacked
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if ( _BoundColumns.IsNull() )
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{
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Win4Assert( !"are we being hacked?" );
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THROW( CException( E_FAIL ) );
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}
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}
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void SetSource(CTableSource *pSource)
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{ _pSource = pSource; }
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CTableSource & GetSource()
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{ return *_pSource; }
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private:
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// Check that a binding is legal.
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SCODE _CheckBinding(
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CTableColumn const & rCol,
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CTableRowAlloc & rRowAlloc,
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USHORT maxRow
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);
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// Check that a set of bindings is legal.
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SCODE _CheckBindings(
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CTableColumnSet const & rCols,
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CTableRowAlloc & rRowAlloc,
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USHORT maxRow
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);
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USHORT _hUnique; // unique portion of handle matched
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// on external calls
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USHORT _cbRowWidth; // width of output row
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XPtr<CTableColumnSet> _BoundColumns; // Bound output column description
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CTableSource * _pSource; // source associated with cursor
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};
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//+---------------------------------------------------------------------------
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//
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// Class: CTableCursorSet
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//
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// Purpose: A collection of CTableCursors.
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//
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// Notes:
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//
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// History: 02 Jun 94 AlanW Created
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//
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//----------------------------------------------------------------------------
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DECL_DYNARRAY( CTableCursorArray, CTableCursor )
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class CTableCursorSet : public CTableCursorArray
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{
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public:
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CTableCursorSet(void):
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_hKeyGenerator(0),
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CTableCursorArray(1)
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{
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}
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~CTableCursorSet(void);
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CTableCursor& Lookup(ULONG hCursor);
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void Add( CTableCursor * const pCursorIn,
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ULONG &rhCursor );
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SCODE Release(ULONG hCursor);
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unsigned Count();
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private:
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USHORT _hKeyGenerator; // generator value for cursor handles
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};
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