82 lines
2.7 KiB
C++
82 lines
2.7 KiB
C++
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//+---------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1991 - 1992.
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//
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// File: PropDesc.hxx
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//
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// Contents: Persistent property store metadata
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//
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// Classes: CPropDesc
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//
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// History: 27-Dec-19 KyleP Created
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//
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//----------------------------------------------------------------------------
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#pragma once
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//+-------------------------------------------------------------------------
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//
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// Class: CPropDesc
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//
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// Purpose: Description of metadata for a single property
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//
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// History: 27-Dec-95 KyleP Created
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//
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//--------------------------------------------------------------------------
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class CPropDesc
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{
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public:
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CPropDesc() { _pid = pidInvalid; }
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void Init( PROPID pid,
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ULONG vt,
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DWORD oStart,
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DWORD cbMax,
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DWORD ordinal,
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DWORD rec,
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BOOL fModifiable = TRUE )
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{
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_pid = pid;
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_vt = vt;
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_oStart = oStart;
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_cbMax = cbMax;
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_ordinal = ordinal;
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_mask = 1 << ((ordinal % 16) * 2);
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_rec = rec;
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_fModifiable = fModifiable;
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}
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PROPID Pid() const { return _pid; }
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ULONG Type() const { return _vt; }
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DWORD Offset() const { return _oStart; }
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DWORD Size() const { return _cbMax; }
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DWORD Ordinal() const { return _ordinal; }
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DWORD Mask() const { return _mask; }
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DWORD Record() const { return _rec; }
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BOOL Modifiable() const { return _fModifiable; }
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BOOL IsInUse() const { return (_pid != pidInvalid); }
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void Free() { _pid = pidInvalid - 1; }
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BOOL IsFree() const { return (_pid == (pidInvalid - 1) || _pid == pidInvalid); }
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BOOL IsFixedSize() const { return (_oStart != 0xFFFFFFFF); }
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void SetOrdinal( DWORD ordinal ) { _ordinal = ordinal; _mask = 1 << ((ordinal % 16) * 2); }
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void SetOffset( DWORD oStart ) { _oStart = oStart; }
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void SetRecord( DWORD rec ) { _rec = rec; }
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private:
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PROPID _pid; // Propid
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ULONG _vt; // Data type (fixed types only)
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DWORD _oStart; // Offset in fixed area to property (fixed types only)
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DWORD _cbMax; // Max size of property (used to compute record size)
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DWORD _ordinal; // Position of property in record. Zero based.
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DWORD _mask; // 1 << Ordinal. Stored for efficiency
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DWORD _rec; // Position of metadata object in metadata stream.
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BOOL _fModifiable;// Can this property meta info be modified after initial setting?
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};
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