Source code of Windows XP (NT5)
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//+--------------------------------------------------------------------------
//
// Microsoft Windows
// Copyright (C) Microsoft Corporation, 1996 - 1997.
//
// File: bitflag.hxx
//
// Contents: Lightweight class for test/set/clear bit flags.
//
// Classes: CBitFlag
//
// History: 2-17-1997 DavidMun Created
//
//---------------------------------------------------------------------------
#ifndef __BITFLAG_HXX_
#define __BITFLAG_HXX_
#define CBITFLAG_FLAGWORD DWORD
//+--------------------------------------------------------------------------
//
// Class: CBitFlag
//
// Purpose: Lightweight class for test/set/clear bit flags.
//
// History: 2-17-1997 DavidMun Created
//
// Notes: Designed for use as a base class.
//
//---------------------------------------------------------------------------
class CBitFlag { public:
CBitFlag();
protected: BOOL _IsFlagSet( CBITFLAG_FLAGWORD fl) const;
VOID _SetFlag( CBITFLAG_FLAGWORD fl);
VOID _ClearFlag( CBITFLAG_FLAGWORD fl);
VOID _SetMask( CBITFLAG_FLAGWORD flSet, CBITFLAG_FLAGWORD flMask);
CBITFLAG_FLAGWORD _QueryMask( CBITFLAG_FLAGWORD flMask);
CBITFLAG_FLAGWORD _flFlags; };
//+--------------------------------------------------------------------------
//
// Member: CBitFlag::CBitFlag
//
// Synopsis: ctor
//
// History: 2-17-1997 DavidMun Created
//
//---------------------------------------------------------------------------
inline CBitFlag::CBitFlag(): _flFlags(0) { }
//+--------------------------------------------------------------------------
//
// Member: CBitFlag::_IsFlagSet
//
// Synopsis: Return TRUE if one or more bits in [fl] are set.
//
// History: 2-17-1997 DavidMun Created
//
//---------------------------------------------------------------------------
inline BOOL CBitFlag::_IsFlagSet( CBITFLAG_FLAGWORD fl) const { return (_flFlags & fl) ? TRUE : FALSE; }
//+--------------------------------------------------------------------------
//
// Member: CBitFlag::_SetFlag
//
// Synopsis: Turn on flag bit(s) [fl].
//
// History: 2-17-1997 DavidMun Created
//
//---------------------------------------------------------------------------
inline VOID CBitFlag::_SetFlag( CBITFLAG_FLAGWORD fl) { _flFlags |= fl; }
//+--------------------------------------------------------------------------
//
// Member: CBitFlag::_ClearFlag
//
// Synopsis: Clear flag bit(s) [fl].
//
// History: 2-17-1997 DavidMun Created
//
//---------------------------------------------------------------------------
inline VOID CBitFlag::_ClearFlag( CBITFLAG_FLAGWORD fl) { _flFlags &= ~fl; }
//+--------------------------------------------------------------------------
//
// Member: CBitFlag::_SetMask
//
// Synopsis: Set
//
// History: 12-04-1997 JonN Created
//
//---------------------------------------------------------------------------
inline VOID CBitFlag::_SetMask( CBITFLAG_FLAGWORD flSet, CBITFLAG_FLAGWORD flMask)
{ _flFlags = (_flFlags & ~flMask) | flSet; }
//+--------------------------------------------------------------------------
//
// Member: CBitFlag::_QueryMask
//
// Synopsis: Set
//
// History: 12-04-1997 JonN Created
//
//---------------------------------------------------------------------------
inline CBITFLAG_FLAGWORD CBitFlag::_QueryMask( CBITFLAG_FLAGWORD flMask)
{ return (_flFlags & flMask); }
#endif // __BITFLAG_HXX_
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