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