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(* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is TurboPower SysTools
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*
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* The Initial Developer of the Original Code is
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* TurboPower Software
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*
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* Portions created by the Initial Developer are Copyright (C) 1996-2002
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* ***** END LICENSE BLOCK ***** *)
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unit BcdCalU;
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interface
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uses
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SysUtils, Windows, Classes, Graphics, Controls,
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Forms, Dialogs, StdCtrls, ExtCtrls, Buttons, Menus, Clipbrd;
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type
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BCDCharSet = set of Char;
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BCDOperSet = set of Char;
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type
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TBCDCalcDlg = class(TForm)
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ZeroBtn: TBitBtn;
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DecKey: TBitBtn;
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ThreeKey: TBitBtn;
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OneKey: TBitBtn;
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TwoKey: TBitBtn;
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SixKey: TBitBtn;
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FourKey: TBitBtn;
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FiveKey: TBitBtn;
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NineKey: TBitBtn;
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SevenKey: TBitBtn;
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EightKey: TBitBtn;
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SqrtBtn: TBitBtn;
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LnBtn: TBitBtn;
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ExpBtn: TBitBtn;
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XtoYBtn: TBitBtn;
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AddBtn: TBitBtn;
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SubBtn: TBitBtn;
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MulBtn: TBitBtn;
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DivBtn: TBitBtn;
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PlusMinusBtn: TBitBtn;
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ClearBtn: TBitBtn;
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EqualBtn: TBitBtn;
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ClearEntryBtn: TBitBtn;
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Bevel1: TBevel;
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gb1: TGroupBox;
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BCDString: TEdit;
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BSBtn: TBitBtn;
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Memo1: TMemo;
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PopupMenu1: TPopupMenu;
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Copy1: TMenuItem;
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Paste1: TMenuItem;
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procedure FormCreate(Sender: TObject);
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procedure FormKeyPress(Sender: TObject; var Key: Char);
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procedure CloseBtnClick(Sender: TObject);
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procedure ClearBtnClick(Sender: TObject);
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procedure ZeroBtnClick(Sender: TObject);
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procedure DecKeyClick(Sender: TObject);
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procedure OneKeyClick(Sender: TObject);
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procedure TwoKeyClick(Sender: TObject);
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procedure ThreeKeyClick(Sender: TObject);
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procedure FourKeyClick(Sender: TObject);
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procedure FiveKeyClick(Sender: TObject);
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procedure SixKeyClick(Sender: TObject);
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procedure SevenKeyClick(Sender: TObject);
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procedure EightKeyClick(Sender: TObject);
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procedure NineKeyClick(Sender: TObject);
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procedure PlusMinusBtnClick(Sender: TObject);
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procedure AddBtnClick(Sender: TObject);
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procedure SubBtnClick(Sender: TObject);
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procedure MulBtnClick(Sender: TObject);
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procedure DivBtnClick(Sender: TObject);
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procedure SqrtBtnClick(Sender: TObject);
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procedure ExpBtnClick(Sender: TObject);
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procedure LnBtnClick(Sender: TObject);
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procedure XtoYBtnClick(Sender: TObject);
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procedure EqualBtnClick(Sender: TObject);
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procedure ClearEntryBtnClick(Sender: TObject);
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procedure BSBtnClick(Sender: TObject);
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procedure Copy1Click(Sender: TObject);
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procedure Paste1Click(Sender: TObject);
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private
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{ Private declarations }
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public
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{ Public declarations }
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BCDChar : BCDCharSet;
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BCDOper : BCDOperSet;
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PendOp : Char;
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DFHold : Integer;
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XBuffer : string[20];
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ClearOnNext : Boolean;
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procedure SendKeyPress(Sender : TObject; C : Char);
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end;
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var
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BCDCalcDlg: TBCDCalcDlg;
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implementation
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{$R *.DFM}
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uses
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StConst,
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StBase,
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StStrL,
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StBCD;
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procedure TBCDCalcDlg.FormCreate(Sender: TObject);
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begin
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BCDChar := ['0'..'9', SysUtils.DecimalSeparator, 'p'];
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BCDOper := ['+', '-', '/', '*', '^', 'e', 'l', 's', '='];
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DecKey.Caption := SysUtils.DecimalSeparator;
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Memo1.Lines[0] := '0';
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PendOp := #0;
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DFHold := 0;
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XBuffer := '0';
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ClearOnNext := False;
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end;
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function BytesToString(Value : PByte; Size : Cardinal) : string;
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{-convert byte array to string, no spaces or hex enunciators, e.g., '$'}
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var
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I,
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Index : Cardinal;
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S : String[3];
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begin
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{$IFOPT H+}
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SetLength(Result,2*Size);
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{$ELSE}
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Result[0] := AnsiChar(Size*2);
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{$ENDIF}
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for I := 1 to Size do
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begin
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Index := I*2;
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{$IFOPT H+}
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S := HexBL(Byte(PAnsiChar(Value)[I-1]));
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{$ELSE}
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S := HexBS(Byte(PAnsiChar(Value)[I-1]);
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{$ENDIF}
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Result[(Index)-1] := S[1];
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Result[Index] := S[2];
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end;
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end;
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function StringToBytes(IString : string; var Value; Size : LongInt) : Boolean;
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{-convert string (by groups of 2 char) to byte values}
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var
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Code,
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Index,
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I : Integer;
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Q : TBcd;
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S : array[1..3] of AnsiChar;
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begin
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if ((Length(IString) div 2) <> Size) then
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begin
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Result := False;
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Exit;
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end;
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Result := True;
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for I := 1 to Size do
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begin
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Index := (2*(I-1))+1;
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S[1] := '$';
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S[2] := IString[Index];
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S[3] := IString[Index+1];
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Val(S,Q[I-1],Code);
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if (Code <> 0) then
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begin
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Result := False;
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Exit;
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end;
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end;
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Move(Q,Value,Size);
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end;
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procedure TBCDCalcDlg.FormKeyPress(Sender: TObject; var Key: Char);
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var
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HldOp : Char;
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L : Integer;
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BCD1 : TBcd;
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S : string[21];
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begin
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if Memo1.Lines[0] = '0' then
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Memo1.Lines[0] := '';
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if Key = #13 then begin
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if XBuffer = '0' then
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XBuffer := Memo1.Lines[0]
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else begin
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EqualBtnClick(Sender);
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XBuffer := '0';
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end;
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Key := #0;
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ClearOnNext := True;
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end;
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if Key in BCDChar then begin
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if (Length(Memo1.Lines[0]) = 0) and (Key = SysUtils.DecimalSeparator) then begin
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Memo1.Lines[0] := '0';
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end;
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if (Key = 'p') then begin
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S := Memo1.Lines[0];
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if (S[1] <> '-') then
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Insert('-',S,1)
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else
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Delete(S,1,1);
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Memo1.Lines[0] := S;
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BCD1 := ValBcd(S);
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BCDString.Text := BytesToString(@BCD1,SizeOf(BCD1));
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Key := #0;
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end else begin
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if ClearOnNext then begin
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Memo1.Lines[0] := '';
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ClearOnNext := False;
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end;
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end;
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end;
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if Key in BCDOper then begin
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if not (Key in ['s', 'e', 'l']) then begin
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if Memo1.Lines[0] = '' then
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Memo1.Lines[0] := '0';
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if (XBuffer <> '0') then
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EqualBtnClick(Sender);
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XBuffer := Memo1.Lines[0];
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BCD1 := ValBcd(XBuffer);
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BCDString.Text := BytesToString(@BCD1,SizeOf(BCD1));
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PendOp := Key;
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Key := #0;
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ClearOnNext := True;
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end else begin
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HldOp := PendOp;
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PendOp := Key;
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EqualBtnClick(Sender);
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PendOp := HldOp;
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Key := #0;
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end;
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end;
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if (Key in BCDChar) then begin
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S := Memo1.Lines[0];
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L := Length(S);
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if (L < Memo1.MaxLength) then begin
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Memo1.Lines[0] := S + Key;
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end;
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Key := #0
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end;
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Memo1.SetFocus;
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Memo1.SelStart := Length(Memo1.Lines[0]);
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Memo1.SelLength := 0;
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end;
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procedure TBCDCalcDlg.CloseBtnClick(Sender: TObject);
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begin
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Close;
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end;
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procedure TBCDCalcDlg.ClearBtnClick(Sender: TObject);
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begin
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XBuffer := '0';
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Memo1.Lines[0] := '0';
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BCDString.Text := '';
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PendOp := #0;
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ClearOnNext := True;
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end;
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procedure TBCDCalcDlg.ClearEntryBtnClick(Sender: TObject);
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begin
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Memo1.Lines[0] := '0';
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ClearOnNext := True;
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end;
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procedure TBCDCalcDlg.SendKeyPress(Sender : TObject; C : Char);
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var
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KP : Char;
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begin
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KP := C;
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FormKeyPress(Sender,KP);
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end;
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procedure TBCDCalcDlg.ZeroBtnClick(Sender: TObject);
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begin
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SendKeyPress(Sender,'0');
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end;
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procedure TBCDCalcDlg.DecKeyClick(Sender: TObject);
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begin
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SendKeyPress(Sender, SysUtils.DecimalSeparator);
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end;
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procedure TBCDCalcDlg.OneKeyClick(Sender: TObject);
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begin
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SendKeyPress(Sender,'1');
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end;
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procedure TBCDCalcDlg.TwoKeyClick(Sender: TObject);
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begin
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SendKeyPress(Sender,'2');
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end;
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procedure TBCDCalcDlg.ThreeKeyClick(Sender: TObject);
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begin
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SendKeyPress(Sender,'3');
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end;
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procedure TBCDCalcDlg.FourKeyClick(Sender: TObject);
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begin
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SendKeyPress(Sender,'4');
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end;
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procedure TBCDCalcDlg.FiveKeyClick(Sender: TObject);
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begin
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SendKeyPress(Sender,'5');
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end;
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procedure TBCDCalcDlg.SixKeyClick(Sender: TObject);
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begin
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SendKeyPress(Sender,'6');
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end;
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procedure TBCDCalcDlg.SevenKeyClick(Sender: TObject);
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begin
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SendKeyPress(Sender,'7');
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end;
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procedure TBCDCalcDlg.EightKeyClick(Sender: TObject);
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begin
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SendKeyPress(Sender,'8');
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end;
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procedure TBCDCalcDlg.NineKeyClick(Sender: TObject);
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begin
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SendKeyPress(Sender,'9');
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end;
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procedure TBCDCalcDlg.PlusMinusBtnClick(Sender: TObject);
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begin
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SendKeyPress(Sender,'p');
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end;
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procedure TBCDCalcDlg.AddBtnClick(Sender: TObject);
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begin
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SendKeyPress(Sender,'+');
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end;
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procedure TBCDCalcDlg.SubBtnClick(Sender: TObject);
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begin
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SendKeyPress(Sender,'-');
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end;
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procedure TBCDCalcDlg.MulBtnClick(Sender: TObject);
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begin
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SendKeyPress(Sender,'*');
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end;
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procedure TBCDCalcDlg.DivBtnClick(Sender: TObject);
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begin
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SendKeyPress(Sender,'/');
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end;
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procedure TBCDCalcDlg.SqrtBtnClick(Sender: TObject);
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begin
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SendKeyPress(Sender,'s');
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end;
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procedure TBCDCalcDlg.ExpBtnClick(Sender: TObject);
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begin
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SendKeyPress(Sender,'e');
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end;
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procedure TBCDCalcDlg.LnBtnClick(Sender: TObject);
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begin
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SendKeyPress(Sender,'l');
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end;
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procedure TBCDCalcDlg.XtoYBtnClick(Sender: TObject);
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begin
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SendKeyPress(Sender,'^');
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end;
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procedure TBCDCalcDlg.EqualBtnClick(Sender: TObject);
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var
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// RV : Extended;
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S : string[21];
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BCD : TBcd;
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begin
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if PendOp <> #0 then begin
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S := Memo1.Lines[0];
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if S = '' then begin
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MessageBeep(0);
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Exit;
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end;
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case PendOp of
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'+' : begin
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// RV := StrToFloat(XBuffer) + StrToFloat(S);
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BCD := AddBCD(ValBCD(XBuffer), ValBCD(S));
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// Memo1.Lines[0] := FloatToStr(RV);
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Memo1.Lines[0] := RightTrimCharsL(Trim(StrBCD(BCD, 35, 20)), '0');
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// BCD := ValBcd(Memo1.Lines[0]);
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BCDString.Text := BytesToString(@BCD,SizeOf(BCD));
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end;
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'-' : begin
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// RV := StrToFloat(XBuffer) - StrToFloat(S);
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BCD := SubBCD(ValBCD(XBuffer), ValBCD(S));
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// Memo1.Lines[0] := FloatToStr(RV);
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Memo1.Lines[0] := RightTrimCharsL(Trim(StrBCD(BCD, 35, 20)), '0');
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// BCD := ValBcd(Memo1.Lines[0]);
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BCDString.Text := BytesToString(@BCD,SizeOf(BCD));
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end;
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'*' : begin
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// RV := StrToFloat(XBuffer) * StrToFloat(S);
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BCD := MulBCD(ValBCD(XBuffer), ValBCD(S));
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// Memo1.Lines[0] := FloatToStr(RV);
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Memo1.Lines[0] := RightTrimCharsL(Trim(StrBCD(BCD, 35, 20)), '0');
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// BCD := ValBcd(Memo1.Lines[0]);
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BCDString.Text := BytesToString(@BCD,SizeOf(BCD));
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end;
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'/' : begin
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// RV := StrToFloat(S);
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BCD := ValBCD(S);
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// if RV = 0 then begin
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if CmpBcd(BCD, ZeroBcd) = 0 then begin
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Memo1.Lines[0] := 'Divide by zero error';
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PendOp := #0;
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ClearOnNext := False;
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end else begin
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// RV := StrToFloat(XBuffer) / StrToFloat(S);
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BCD := DivBCD(ValBCD(XBuffer), BCD);
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// Memo1.Lines[0] := FloatToStr(RV);
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Memo1.Lines[0] := RightTrimCharsL(Trim(StrBCD(BCD, 35, 20)), '0');
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// BCD := ValBcd(Memo1.Lines[0]);
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BCDString.Text := BytesToString(@BCD,SizeOf(BCD));
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end;
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end;
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's' : begin
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// RV := Sqrt(StrToFloat(S));
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BCD := SqrtBcd(ValBCD(S));
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// Memo1.Lines[0] := FloatToStr(RV);
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Memo1.Lines[0] := RightTrimCharsL(Trim(StrBCD(BCD, 35, 20)), '0');
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// BCD := ValBcd(Memo1.Lines[0]);
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BCDString.Text := BytesToString(@BCD,SizeOf(BCD));
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end;
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'e' : begin
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// RV := Exp(StrToFloat(S));
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BCD := ExpBCD(ValBCD(S));
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// Memo1.Lines[0] := FloatToStr(RV);
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Memo1.Lines[0] := RightTrimCharsL(Trim(StrBCD(BCD, 35, 20)), '0');
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// BCD := ValBcd(Memo1.Lines[0]);
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BCDString.Text := BytesToString(@BCD,SizeOf(BCD));
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end;
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'l' : begin
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// RV := ln(StrToFloat(S));
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BCD := lnBCD(ValBCD(S));
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// Memo1.Lines[0] := FloatToStr(RV);
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Memo1.Lines[0] := RightTrimCharsL(Trim(StrBCD(BCD, 35, 20)), '0');
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// BCD := ValBcd(Memo1.Lines[0]);
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BCDString.Text := BytesToString(@BCD,SizeOf(BCD));
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end;
|
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'^' : begin
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// RV := exp(ln(StrToFloat(XBuffer)) * StrToFloat(S));
|
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BCD := PowBCD(ValBCD(XBuffer), ValBCD(S));
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// Memo1.Lines[0] := FloatToStr(RV);
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Memo1.Lines[0] := RightTrimCharsL(Trim(StrBCD(BCD, 35, 20)), '0');
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// BCD := ValBcd(Memo1.Lines[0]);
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BCDString.Text := BytesToString(@BCD,SizeOf(BCD));
|
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end;
|
492 |
|
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end;
|
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end;
|
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PendOp := #0;
|
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ClearOnNext := True;
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Memo1.SetFocus;
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498 |
Memo1.SelStart := 0;
|
499 |
Memo1.SelLength := 0;
|
500 |
end;
|
501 |
|
502 |
|
503 |
procedure TBCDCalcDlg.BSBtnClick(Sender: TObject);
|
504 |
begin
|
505 |
Memo1.Lines[0] := Copy(Memo1.Lines[0], 1, Length(Memo1.Lines[0]) - 1);
|
506 |
if Length(Memo1.Lines[0]) = 0 then
|
507 |
ClearBtnClick(ClearBtn);
|
508 |
end;
|
509 |
|
510 |
procedure TBCDCalcDlg.Copy1Click(Sender: TObject);
|
511 |
begin
|
512 |
Memo1.SelectAll;
|
513 |
Memo1.CopyToClipboard;
|
514 |
Memo1.SelStart := 0;
|
515 |
end;
|
516 |
|
517 |
procedure TBCDCalcDlg.Paste1Click(Sender: TObject);
|
518 |
var
|
519 |
S : string;
|
520 |
IsNeg : Boolean;
|
521 |
begin
|
522 |
S := Clipboard.AsText;
|
523 |
IsNeg := False;
|
524 |
if (S[1] = '-') then begin
|
525 |
IsNeg := True;
|
526 |
S := Copy(S, 2, Length(S) - 1);
|
527 |
end;
|
528 |
|
529 |
if IsStrNumericL(S, '0123456789' + SysUtils.DecimalSeparator) then begin
|
530 |
if IsNeg then S := '-' + S;
|
531 |
Memo1.Lines[0] := S;
|
532 |
end;
|
533 |
end;
|
534 |
|
535 |
end.
|