{MkBitFlg - BitFlag-routines extracted MkMisc - Copyright 1993 by Mark May - MK Software
 changes (c) 1999-2000 by Andre Grueneberg (2:2411/525;andre@grueneberg.de)
 changes (c) 1999-2001 by Oliver Kopp (2:2471/1464;olly98@users.sourceforge.net)
****************************************************************************
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
****************************************************************************}
(* $Id: mkbitflg.pas,v 1.1 2001/04/01 22:28:08 olly98 Exp $ *)

unit MkBitFlg;

{$I MKB.Def}

interface

Procedure SetLFlag(Var L: LongInt; Bit: Byte; Setting: Boolean);
Function  GetLFlag(L: LongInt; Bit: Byte): Boolean;
Procedure SetWFlag(Var L: System.Word; Bit: Byte; Setting: Boolean);
Function  GetWFlag(L: Word; Bit: Byte): Boolean;
Procedure SetBFlag(Var L: Byte; Bit: Byte; Setting: Boolean);
Function  GetBFlag(L: Byte; Bit: Byte): Boolean;
Procedure UpdateWordFlag(Var Flag: System.Word; Mask: Word; Setting: Boolean);

implementation

Procedure SetLFlag(Var L: LongInt; Bit: Byte; Setting: Boolean);
  Var
    Mask: LongInt;

  Begin
  Mask := 1;
  Mask := Mask Shl (Bit - 1);
  If Setting Then
    L := L or Mask
  Else
    L := (L and (Not Mask));
  End;


Function GetLFlag(L: LongInt; Bit: Byte): Boolean;
  Var
    Mask: LongInt;

  Begin
  Mask := 1;
  Mask := Mask Shl (Bit - 1);
  If (L and Mask) = 0 Then
    GetLFlag := False
  Else
    GetLFlag := True;
  End;


Procedure SetWFlag(Var L: System.Word; Bit: Byte; Setting: Boolean);
  Var
    Mask: Word;

  Begin
  Mask := 1;
  Mask := Mask Shl (Bit - 1);
  If Setting Then
    L := L or Mask
  Else
    L := (L and (Not Mask));
  End;


Function GetWFlag(L: Word; Bit: Byte): Boolean;
  Var
    Mask: Word;

  Begin
  Mask := 1;
  Mask := Mask Shl (Bit - 1);
  If (L and Mask) = 0 Then
    GetWFlag := False
  Else
    GetWFlag := True;
  End;


Procedure SetBFlag(Var L: Byte; Bit: Byte; Setting: Boolean);
  Var
    Mask: Byte;

  Begin
  Mask := 1;
  Mask := Mask Shl (Bit - 1);
  If Setting Then
    L := L or Mask
  Else
    L := (L and (Not Mask));
  End;


Function GetBFlag(L: Byte; Bit: Byte): Boolean;
  Var
    Mask: Byte;

  Begin
  Mask := 1;
  Mask := Mask Shl (Bit - 1);
  If (L and Mask) = 0 Then
    GetBFlag := False
  Else
    GetBFlag := True;
  End;

Procedure UpdateWordFlag(Var Flag: System.Word; Mask: Word; Setting: Boolean);
  Begin
  If Setting Then
    Flag := Flag or Mask
  Else
    Flag := Flag and (Not Mask);
  End;


end.