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uExpressionCalculator.pas
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unit uExpressionCalculator;
(*
Syntax:
0b0101, 01010b, 0101b - Binary number
0o377, 0377o, 377o - Octal number
0xABCD, 0ABCDh, $ABCD - Hex number
90`15`2 - Degree
Operators by priorities:
{7} ( ) (BRACES)
{6} ** (POWER)
{5} ~ (INVERSE)
! NOT (NOT)
{4} * (MUL)
/ (DIV)
% MOD (MOD)
%% (PERSENT)
<< (Shift Left)
>> (Shift Right)
{3} + (ADD)
- (SUB)
{2} < (Less)
<= (Less or Equal)
== (Equal)
<> != (Not Equal)
>= (Greater or Equal)
> (Greater)
{1} | OR (OR)
^ XOR (XOR)
& AND (AND)
Functions
atan / arctan
ceil
cos
exp
floor
frac
int
ln
pi
round
sgn
sign
sin
sqr
sqrt
tan
trunc
xsgn
Error Codes
0 = Success
-1 = Syntax error
-2 = Unknown function or variable, see LastError for Name
*)
// MS KeyUp/Down? -> Auto detect mode...
interface
{$DEFINE uCheckStringGrid}
{$DEFINE uTLH_ComponentTools}
{$DEFINE BigNumbers}
{$WARN SYMBOL_PLATFORM OFF}
uses
Classes, Controls, ExtCtrls, Forms, StdCtrls, Grids
{$IFDEF BigNumbers}
,Velthuis.BigIntegers
,Velthuis.BigDecimals
{$ENDIF BigNumbers}
{$IFDEF uCheckStringGrid}
,uCheckStringGrid
{$ENDIF uCheckStringGrid}
{$IFDEF uTLH_ComponentTools}
,uTLH.ComponentTools
{$ENDIF uTLH_ComponentTools}
;
type
TExpressionCalculatorToken = (
{ } tkEOF, tkERROR, tkASSIGN,
{7} tkLBRACE, tkRBRACE, tkNUMBER, tkIDENT, tkSEMICOLON,
{6} tkPower,
{5} tkInverse, tkNOT,
{4} tkMUL, tkDIV, tkMOD, tkPER, tkShiftLeft, tkShiftRight,
{3} tkADD, tkSUB,
{2} tkLess, tkLessEqual, tkEqual, tkNotEqual, tkGreaterEqual, tkGreater,
{1} tkOR, tkXOR, tkAND
);
TExpressionCalculatorMode = (
ecmSigned,
ecmUnsigned,
ecmDouble
{$IFDEF BigNumbers}
,ecmBigInteger
,ecmBigDecimal
{$ENDIF BigNumbers}
);
TExpressionCalculatorValue = packed record
{$IFDEF BigNumbers}
BigInteger : BigInteger;
BigDecimal : BigDecimal;
{$ENDIF BigNumbers}
case Integer of
0 : ( Int64 : Int64 );
1 : ( UInt64 : UInt64 );
2 : ( Double : Double );
// {$IFDEF BigNumbers}
// 3 : ( BigInteger : BigInteger );
// 4 : ( BigDecimal : BigDecimal );
// {$ENDIF BigNumbers}
end;
TExpressionCalculatorCallbackType = ( ctGetValue, ctSetValue, ctFunction );
TExpressionCalculatorCallback = function( ctype: TExpressionCalculatorCallbackType; const S: String; var Value: TExpressionCalculatorValue ): Boolean of object;
TExpressionCalculatorNamedVariable = record
Value : TExpressionCalculatorValue;
Name : array [ 0..0 ] of Char;
end;
PExpressionCalculatorNamedVariable = ^TExpressionCalculatorNamedVariable;
TExpressionCalculator = class( TPersistent )
private
fLastError : String;
fPtr : PChar;
fMode : TExpressionCalculatorMode;
fResult : TExpressionCalculatorValue;
fsValue : String;
fToken : TExpressionCalculatorToken;
fCalcProc : TExpressionCalculatorCallback;
FExpression : String;
FVars : TList;
{ Default calculator callback proc }
function CalcProc( ctype: TExpressionCalculatorCallbackType; const S: String; var V: TExpressionCalculatorValue ): Boolean;
{ Calculate functions }
function start( var R: TExpressionCalculatorValue ) : Integer;
function Lex : Integer;
function term( var R: TExpressionCalculatorValue ) : Integer;
function Expression1( var R: TExpressionCalculatorValue ) : Integer;
function Expression2( var R: TExpressionCalculatorValue ) : Integer;
function Expression3( var R: TExpressionCalculatorValue ) : Integer;
function Expression4( var R: TExpressionCalculatorValue ) : Integer;
function Expression5( var R: TExpressionCalculatorValue ) : Integer;
function Expression6( var R: TExpressionCalculatorValue ) : Integer;
function GetResult: TExpressionCalculatorValue;
function GetVar( const Name: String ): TExpressionCalculatorValue;
procedure SetVar( const Name: String; value: TExpressionCalculatorValue );
protected
function Callback( ctype: TExpressionCalculatorCallbackType; const Name: String; var Res: TExpressionCalculatorValue ): Boolean;
public
constructor Create;
destructor Destroy; override;
function NameOf( Index: Word ): String;
procedure ClearVars;
property Vars[ const Name: String ]: TExpressionCalculatorValue read GetVar Write SetVar;
property LastError : String read fLastError;
function Calculate( var R: TExpressionCalculatorValue; Expression: String = ''; Proc: TExpressionCalculatorCallback = nil ): Integer; overload;
function CalculateSigned( var Value: Int64; Expression: String = ''; Proc: TExpressionCalculatorCallback = nil ): Integer;
function CalculateUnSigned( var Value: UInt64; Expression: String = ''; Proc: TExpressionCalculatorCallback = nil ): Integer;
function CalculateDouble( var Value: Double; Expression: String = ''; Proc: TExpressionCalculatorCallback = nil ): Integer; overload;
{$IFDEF BigNumbers}
function CalculateBigInteger( var Value: BigInteger; Expression: String = ''; Proc: TExpressionCalculatorCallback = nil ): Integer; overload;
function CalculateBigDecimal( var Value: BigDecimal; Expression: String = ''; Proc: TExpressionCalculatorCallback = nil ): Integer; overload;
{$ENDIF BigNumbers}
published
property Mode : TExpressionCalculatorMode read fMode write fMode;
property Expression : String read FExpression write FExpression;
property Result : TExpressionCalculatorValue read GetResult;
end;
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
TFrExpressionCalculator = class(TFrame)
pnlMain: TPanel;
grpExpression: TGroupBox;
edtExpression: TEdit;
btnClear: TButton;
pnlResultTop: TPanel;
splResultTop: TSplitter;
grpOctal: TGroupBox;
edtOctal: TEdit;
grpBinary: TGroupBox;
edtBinary: TEdit;
pnlResultBottom: TPanel;
splResultBottom: TSplitter;
grpDecimal: TGroupBox;
edtDecimal: TEdit;
grpHexadecimal: TGroupBox;
edtHexadecimal: TEdit;
grpHistory: TGroupBox;
rgMode: TRadioGroup;
pnlHelp: TPanel;
mmoHelp: TMemo;
pnlHelpButton: TPanel;
btnHelp: TButton;
procedure edtExpressionChange(Sender: TObject);
procedure KeyPressReadOnly(Sender: TObject; var Key: Char);
procedure edtExpressionKeyPress(Sender: TObject; var Key: Char);
procedure btnClearClick(Sender: TObject);
procedure HistoryOnDblClick(Sender : TObject);
procedure FrameResize(Sender: TObject);
procedure rgModeClick(Sender: TObject);
procedure btnHelpClick(Sender: TObject);
private
{ Private declarations }
fCalculator : TExpressionCalculator;
fHistory : {$IFDEF uCheckStringGrid}TCheckStringGrid{$ELSE}TStringGrid{$ENDIF};
fResult : Integer;
public
{ Public declarations }
constructor Create( AOwner: TComponent ); override;
destructor Destroy; override;
property History : {$IFDEF uCheckStringGrid}TCheckStringGrid{$ELSE}TStringGrid{$ENDIF} read fHistory;
end;
TFrmCalculator = class( TForm )
private
fCalculator : TFrExpressionCalculator;
public
constructor CreateNew( AOwner: TComponent; Dummy: Integer = 0 ); reintroduce;
end;
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
var
Calculator : TExpressionCalculator;
FrmCalculator : TFrmCalculator;
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
implementation
uses
Windows, SysUtils, Math;
{$R *.dfm}
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
const
FUNCTION_NAMES : Array [ 0..60 ] of String = (
'cycletograd',
'gradtocycle',
'cycletodeg',
'cycletorad',
'degtocycle',
'radtocycle',
'degtograd',
'gradtodeg',
'gradtorad',
'radtograd',
'cosecant',
'degtorad',
'radtodeg',
'arccosh',
'arccoth',
'arccsch',
'arcsech',
'arcsinh',
'arctanh',
'sqrteps',
'arccos',
'arccot',
'arccsc',
'arcsec',
'arcsin',
'arctan',
'secant',
'cosec',
'cotan',
'floor',
'lnxp1',
'log10',
'round',
'trunc',
'atan',
'ceil',
'cosh',
'coth',
'even',
'frac',
'log2',
'sech',
'sign',
'sign',
'sinh',
'sqrt',
'tanh',
'xsgn',
'abs',
'cos',
'eps',
'exp',
'int',
'odd',
'sec',
'sgn',
'sin',
'sqr',
'tan',
'ln',
'pi'
);
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
constructor TExpressionCalculator.Create;
begin
inherited Create;
FVars := TList.Create;
fPtr := nil;
fMode := ecmSigned;
fResult.Int64 := 0;
{$IFDEF BigNumbers}
fResult.BigInteger.RoundingMode := rmRound;
fResult.BigInteger := 0;
fResult.BigDecimal := 0;
{$ENDIF BigNumbers}
fsValue := '';
fToken := tkERROR;
fCalcProc := CalcProc;
FExpression := '';
fLastError := '';
end;
destructor TExpressionCalculator.Destroy;
begin
ClearVars;
FVars.Free;
inherited;
end;
function TExpressionCalculator.CalcProc( ctype: TExpressionCalculatorCallbackType; const S: String; var V: TExpressionCalculatorValue ): Boolean;
const
EPS = 2.220446049250313E-16;
SQRTEPS = 1.4901161194e-08; // SQRT( EPS )
begin
Result := TRUE;
case ctype of
ctGetValue: begin
if S = 'pi' then
begin
if ( fMode = ecmDouble ) then
V.Double := Pi
{$IFDEF BigNumbers}
else if ( fMode = ecmBigDecimal ) then
V.BigDecimal := Pi
{$ENDIF BigNumbers}
else
result := False;
end
else if S = 'eps' then
begin
if ( fMode = ecmDouble ) then
V.Double := EPS
{$IFDEF BigNumbers}
else if ( fMode = ecmBigDecimal ) then
V.BigDecimal := EPS
{$ENDIF BigNumbers}
else
result := False;
end
else if S = 'sqrteps' then
begin
if ( fMode = ecmDouble ) then
V.Double := SQRTEPS
{$IFDEF BigNumbers}
else if ( fMode = ecmBigDecimal ) then
V.BigDecimal := SQRTEPS
{$ENDIF BigNumbers}
else
result := False;
end
else if S = 'e' then
begin
if ( fMode = ecmDouble ) then
V.Double := 2.718281828
{$IFDEF BigNumbers}
else if ( fMode = ecmBigDecimal ) then
V.BigDecimal := 2.718281828
{$ENDIF BigNumbers}
else
result := False;
end
else
Result := FALSE;
end;
ctSetValue: Result := FALSE;
ctFunction: begin
if S = 'abs' then
begin
if ( fMode = ecmSigned ) then
V.Int64 := ABS( V.Int64 )
else if ( fMode = ecmUnSigned ) then
// {$IF CompilerVersion <= 20}{$RANGECHECKS OFF}{$IFEND} // RangeCheck might cause Internal-Error C1118
// V.UInt64 := ABS( V.UInt64 )
// {$IF CompilerVersion <= 20}{$RANGECHECKS ON}{$IFEND} // RangeCheck might cause Internal-Error C1118
else if ( fMode = ecmDouble ) then
V.Double := ABS( V.Double )
{$IFDEF BigNumbers}
else if ( fMode = ecmBigInteger ) then
V.BigInteger := V.BigInteger.ABS
else if ( fMode = ecmBigDecimal ) then
V.BigDecimal := V.BigDecimal.ABS;
{$ENDIF BigNumbers}
end
else if S = 'round' then
begin
// if ( fMode = ecmSigned ) then
// else if ( fMode = ecmUnSigned ) then
if ( fMode = ecmDouble ) then
V.Double := Round( V.Double )
{$IFDEF BigNumbers}
else if ( fMode = ecmBigInteger ) then
else if ( fMode = ecmBigDecimal ) then
V.BigDecimal := V.BigDecimal.RoundTo( 0 );
{$ENDIF BigNumbers}
end
else if S = 'trunc' then
begin
// if ( fMode = ecmSigned ) then
// else if ( fMode = ecmUnSigned ) then
if ( fMode = ecmDouble ) then
V.Double := Trunc( V.Double )
{$IFDEF BigNumbers}
else if ( fMode = ecmBigInteger ) then
else if ( fMode = ecmBigDecimal ) then
V.BigDecimal := V.BigDecimal.Int; //.Trunc;
{$ENDIF BigNumbers}
end
else if S = 'int' then
begin
// if ( fMode = ecmSigned ) then
// else if ( fMode = ecmUnSigned ) then
if ( fMode = ecmDouble ) then
V.Double := Int( V.Double )
{$IFDEF BigNumbers}
// else if ( fMode = ecmBigInteger ) then
else if ( fMode = ecmBigDecimal ) then
V.BigDecimal := V.BigDecimal.Int;
{$ENDIF BigNumbers}
end
else if S = 'frac' then
begin
if ( fMode = ecmSigned ) then
V.Int64 := 0
else if ( fMode = ecmUnSigned ) then
{$IF CompilerVersion <= 20}{$RANGECHECKS OFF}{$IFEND} // RangeCheck might cause Internal-Error C1118
V.UInt64 := 0
{$IF CompilerVersion <= 20}{$RANGECHECKS ON}{$IFEND} // RangeCheck might cause Internal-Error C1118
else if ( fMode = ecmDouble ) then
V.Double := Frac( V.Double )
{$IFDEF BigNumbers}
else if ( fMode = ecmBigInteger ) then
V.BigInteger := 0
else if ( fMode = ecmBigDecimal ) then
V.BigDecimal := V.BigDecimal.Frac;
{$ENDIF BigNumbers}
end
else if S = 'sin' then
begin
if ( fMode = ecmDouble ) then
V.Double := sin( V.Double )
{$IFDEF BigNumbers}
else if ( fMode = ecmBigInteger ) then
result := false
else if ( fMode = ecmBigDecimal ) then
V.BigDecimal := V.BigDecimal.Sin
{$ENDIF BigNumbers}
else
result := false;
end
else if S = 'cos' then
begin
if ( fMode = ecmDouble ) then
V.Double := cos( V.Double )
{$IFDEF BigNumbers}
else if ( fMode = ecmBigDecimal ) then
V.BigDecimal := V.BigDecimal.Cos
{$ENDIF BigNumbers}
else
result := false;
end
else if S = 'tan' then
begin
if ( fMode = ecmDouble ) then
V.Double := tan( V.Double )
{$IFDEF BigNumbers}
else if ( fMode = ecmBigDecimal ) then
V.BigDecimal := V.BigDecimal.Tan
{$ENDIF BigNumbers}
else
result := false;
end
else if S = 'cotan' then
begin
if ( fMode = ecmDouble ) then
V.Double := CoTan( V.Double )
{$IFDEF BigNumbers}
else if ( fMode = ecmBigDecimal ) then
V.BigDecimal := V.BigDecimal.CoTan
{$ENDIF BigNumbers}
else
result := false;
end
else if ( S = 'atan' ) OR ( S = 'arctan' ) then
begin
if ( fMode = ecmDouble ) then
V.Double := ArcTan( V.Double )
{$IFDEF BigNumbers}
else if ( fMode = ecmBigDecimal ) then
V.BigDecimal := V.BigDecimal.ArcTan
{$ENDIF BigNumbers}
else
result := false;
end
else if ( S = 'sec' ) OR ( S = 'secant' ) then
begin
if ( fMode = ecmDouble ) then
V.Double := Secant( V.Double )
{$IFDEF BigNumbers}
else if ( fMode = ecmBigDecimal ) then
V.BigDecimal := V.BigDecimal.Secant
{$ENDIF BigNumbers}
else
result := false;
end
else if ( S = 'cosec' ) OR ( S = 'cosecant' ) then
begin
if ( fMode = ecmDouble ) then
V.Double := CoSecant( V.Double )
{$IFDEF BigNumbers}
else if ( fMode = ecmBigDecimal ) then
V.BigDecimal := V.BigDecimal.CoSecant
{$ENDIF BigNumbers}
else
result := false;
end
else if S = 'arcsin' then
begin
if ( fMode = ecmDouble ) then
V.Double := ArcSin( V.Double )
{$IFDEF BigNumbers}
else if ( fMode = ecmBigDecimal ) then
V.BigDecimal := V.BigDecimal.ArcSin
{$ENDIF BigNumbers}
else
result := false;
end
else if S = 'arccos' then
begin
if ( fMode = ecmDouble ) then
V.Double := ArcCos( V.Double )
{$IFDEF BigNumbers}
else if ( fMode = ecmBigDecimal ) then
V.BigDecimal := V.BigDecimal.ArcCos
{$ENDIF BigNumbers}
else
result := false;
end
else if S = 'arctanh' then
begin
if ( fMode = ecmDouble ) then
V.Double := ArcTanH( V.Double )
{$IFDEF BigNumbers}
else if ( fMode = ecmBigDecimal ) then
try
V.BigDecimal := V.BigDecimal.ArcTanH;
except
result := false;
end
{$ENDIF BigNumbers}
else
result := false;
end
else if S = 'arcsec' then
begin
if ( fMode = ecmDouble ) then
V.Double := ArcSec( V.Double )
{$IFDEF BigNumbers}
else if ( fMode = ecmBigDecimal ) then
try
V.BigDecimal := V.BigDecimal.ArcSec;
except
result := false;
end
{$ENDIF BigNumbers}
else
result := false;
end
else if S = 'arccsc' then
begin
if ( fMode = ecmDouble ) then
V.Double := ArcCsc( V.Double )
{$IFDEF BigNumbers}
else if ( fMode = ecmBigDecimal ) then
try
V.BigDecimal := V.BigDecimal.ArcCsc;
except
result := false;
end
{$ENDIF BigNumbers}
else
result := false;
end
else if S = 'arccoth' then
begin
if ( fMode = ecmDouble ) then
V.Double := ArcCotH( V.Double )
{$IFDEF BigNumbers}
else if ( fMode = ecmBigDecimal ) then
try
V.BigDecimal := V.BigDecimal.ArcCotH;
except
result := false;
end
{$ENDIF BigNumbers}
else
result := false;
end
else if S = 'arcsech' then
begin
if ( fMode = ecmDouble ) then
V.Double := ArcSecH( V.Double )
{$IFDEF BigNumbers}
else if ( fMode = ecmBigDecimal ) then
try
V.BigDecimal := V.BigDecimal.ArcSecH;
except
result := false;
end
{$ENDIF BigNumbers}
else
result := false;
end
else if S = 'arccsch' then
begin
if ( fMode = ecmDouble ) then
V.Double := ArcCscH( V.Double )
{$IFDEF BigNumbers}
else if ( fMode = ecmBigDecimal ) then
try
V.BigDecimal := V.BigDecimal.ArcCscH;
except
result := false;
end
{$ENDIF BigNumbers}
else
result := false;
end
else if S = 'sinh' then
begin
if ( fMode = ecmDouble ) then
V.Double := SinH( V.Double )
{$IFDEF BigNumbers}
else if ( fMode = ecmBigDecimal ) then
V.BigDecimal := V.BigDecimal.SinH
{$ENDIF BigNumbers}
else
result := false;
end
else if S = 'cosh' then
begin
if ( fMode = ecmDouble ) then
V.Double := CosH( V.Double )
{$IFDEF BigNumbers}
else if ( fMode = ecmBigDecimal ) then
V.BigDecimal := V.BigDecimal.CosH
{$ENDIF BigNumbers}
else
result := false;
end
else if S = 'arcsinh' then
begin
if ( fMode = ecmDouble ) then
V.Double := ArcSinH( V.Double )
{$IFDEF BigNumbers}
else if ( fMode = ecmBigDecimal ) then
V.BigDecimal := V.BigDecimal.ArcSinH
{$ENDIF BigNumbers}
else
result := false;
end
else if S = 'arccosh' then
begin
if ( fMode = ecmDouble ) then
V.Double := ArcCosH( V.Double )
{$IFDEF BigNumbers}
else if ( fMode = ecmBigDecimal ) then
V.BigDecimal := V.BigDecimal.ArcCosH
{$ENDIF BigNumbers}
else
result := false;
end
else if S = 'tanh' then
begin
if ( fMode = ecmDouble ) then
V.Double := TanH( V.Double )
{$IFDEF BigNumbers}
else if ( fMode = ecmBigDecimal ) then
V.BigDecimal := V.BigDecimal.TanH
{$ENDIF BigNumbers}
else
result := false;
end
else if S = 'coth' then
begin
if ( fMode = ecmDouble ) then
V.Double := CotH( V.Double )
{$IFDEF BigNumbers}
else if ( fMode = ecmBigDecimal ) then
V.BigDecimal := V.BigDecimal.CotH
{$ENDIF BigNumbers}
else
result := false;
end
else if S = 'sech' then
begin
if ( fMode = ecmDouble ) then
V.Double := SecH( V.Double )
{$IFDEF BigNumbers}
else if ( fMode = ecmBigDecimal ) then
V.BigDecimal := V.BigDecimal.SecH
{$ENDIF BigNumbers}
else
result := false;
end
else if S = 'arccot' then
begin
if ( fMode = ecmDouble ) then
V.Double := ArcCot( V.Double )
{$IFDEF BigNumbers}
else if ( fMode = ecmBigDecimal ) then
V.BigDecimal := V.BigDecimal.ArcCot
{$ENDIF BigNumbers}
else
result := false;
end
else if S = 'ln' then
begin
if ( fMode = ecmDouble ) then
V.Double := ln( V.Double )
{$IFDEF BigNumbers}
else if ( fMode = ecmBigDecimal ) then
V.BigDecimal := V.BigDecimal.Ln
{$ENDIF BigNumbers}
else
result := false;
end
else if S = 'exp' then
begin
if ( fMode = ecmDouble ) then
try
V.Double := exp( V.Double );
except
V.Double := 0;
fToken := tkERROR;
end
{$IFDEF BigNumbers}
else if ( fMode = ecmBigDecimal ) then
V.BigDecimal := V.BigDecimal.exp
{$ENDIF BigNumbers}
else
result := false;
end
else if S = 'sign' then
begin
if ( fMode = ecmSigned ) then
begin
if ( V.Int64 > 0 ) then
V.Int64 := 1
else if ( V.Int64 < 0 ) then
V.Int64 := -1;
end
else if ( fMode = ecmUnSigned ) then
result := false
else if ( fMode = ecmDouble ) then
begin
if ( V.Double > 0 ) then
V.Double := 1
else if ( V.Double < 0 ) then
V.Double := -1;
end
{$IFDEF BigNumbers}
else if ( fMode = ecmBigInteger ) then
begin
if ( V.BigInteger > 0 ) then
V.BigInteger := 1
else if ( V.BigInteger < 0 ) then
V.BigInteger := -1;
end
else if ( fMode = ecmBigDecimal ) then
begin
if ( V.BigDecimal > 0 ) then
V.BigDecimal := 1
else if ( V.BigDecimal < 0 ) then
V.BigDecimal := -1;
end;
{$ENDIF BigNumbers}
end
else if S = 'sgn' then
begin
if ( fMode = ecmSigned ) then
begin
if ( V.Int64 > 0 ) then
V.Int64 := 1
else if ( V.Int64 < 0 ) then
V.Int64 := 0;
end
else if ( fMode = ecmUnSigned ) then
begin
{$IF CompilerVersion <= 20}{$RANGECHECKS OFF}{$IFEND} // RangeCheck might cause Internal-Error C1118
if ( V.UInt64 > 0 ) then
V.UInt64 := 1
else if ( V.UInt64 < 0 ) then
V.UInt64 := 0;
{$IF CompilerVersion <= 20}{$RANGECHECKS ON}{$IFEND} // RangeCheck might cause Internal-Error C1118
end
else if ( fMode = ecmDouble ) then
begin
if ( V.Double > 0 ) then
V.Double := 1
else if ( V.Double < 0 ) then
V.Double := 0;
end
{$IFDEF BigNumbers}
else if ( fMode = ecmBigInteger ) then
begin
if ( V.BigInteger > 0 ) then
V.BigInteger := 1
else if ( V.BigInteger < 0 ) then
V.BigInteger := 0;
end
else if ( fMode = ecmBigDecimal ) then
begin
if ( V.BigDecimal > 0 ) then
V.BigDecimal := 1
else if ( V.BigDecimal < 0 ) then
V.BigDecimal := 0;
end;
{$ENDIF BigNumbers}
end
else if S = 'xsgn' then
begin
if ( fMode = ecmSigned ) then
begin
if ( V.Int64 < 0 ) then
V.Int64 := 0;
end
else if ( fMode = ecmUnSigned ) then
begin
{$IF CompilerVersion <= 20}{$RANGECHECKS OFF}{$IFEND} // RangeCheck might cause Internal-Error C1118
if ( V.UInt64 < 0 ) then
V.UInt64 := 0;
{$IF CompilerVersion <= 20}{$RANGECHECKS ON}{$IFEND} // RangeCheck might cause Internal-Error C1118
end
else if ( fMode = ecmDouble ) then
begin
if ( V.Double < 0 ) then
V.Double := 0;
end
{$IFDEF BigNumbers}
else if ( fMode = ecmBigInteger ) then
begin
if ( V.BigInteger < 0 ) then
V.BigInteger := 0
end
else if ( fMode = ecmBigDecimal ) then
begin
if ( V.BigDecimal < 0 ) then
V.BigDecimal := 0;
end;
{$ENDIF BigNumbers}
end
else if S = 'ceil' then
begin
if ( fMode = ecmDouble ) then
V.Double := Ceil( V.Double )
{$IFDEF BigNumbers}
else if ( fMode = ecmBigInteger ) then
result := false
else if ( fMode = ecmBigDecimal ) then
V.BigDecimal := V.BigDecimal.Ceil
{$ENDIF BigNumbers}
else
result := false;
end
else if S = 'floor' then
begin
if ( fMode = ecmDouble ) then
V.Double := Floor( V.Double )
{$IFDEF BigNumbers}
else if ( fMode = ecmBigInteger ) then
result := false
else if ( fMode = ecmBigDecimal ) then
V.BigDecimal := V.BigDecimal.Floor
{$ENDIF BigNumbers}
else
result := false;
end
else if S = 'sqr' then
begin
if ( fMode = ecmSigned ) then
V.Int64 := SQR( V.Int64 )
else if ( fMode = ecmUnSigned ) then
{$IF CompilerVersion <= 20}{$RANGECHECKS OFF}{$IFEND} // RangeCheck might cause Internal-Error C1118
V.UInt64 := SQR( V.UInt64 )
{$IF CompilerVersion <= 20}{$RANGECHECKS ON}{$IFEND} // RangeCheck might cause Internal-Error C1118
else if ( fMode = ecmDouble ) then
V.Double := SQR( V.Double )
{$IFDEF BigNumbers}
else if ( fMode = ecmBigInteger ) then
V.BigInteger := V.BigInteger.SQR( V.BigInteger )
else if ( fMode = ecmBigDecimal ) then
V.BigDecimal := V.BigDecimal.SQR;
{$ENDIF BigNumbers}
end
else if S = 'sqrt' then
begin
if ( fMode = ecmDouble ) then
V.Double := SQRT( V.Double )
{$IFDEF BigNumbers}
else if ( fMode = ecmBigInteger ) then
result := false
else if ( fMode = ecmBigDecimal ) then
V.BigDecimal := V.BigDecimal.SQRT
{$ENDIF BigNumbers}
else
result := false;
end
else if S = 'even' then
begin
if ( fMode = ecmSigned ) then
begin
if NOT odd( V.Int64 ) then
V.Int64 := 1
else
V.Int64 := 0;
end
else if ( fMode = ecmUnSigned ) then
{$IF CompilerVersion <= 20}{$RANGECHECKS OFF}{$IFEND} // RangeCheck might cause Internal-Error C1118
begin
if NOT odd( V.UInt64 ) then
V.UInt64 := 1
else
V.UInt64 := 0;
end
{$IF CompilerVersion <= 20}{$RANGECHECKS ON}{$IFEND} // RangeCheck might cause Internal-Error C1118
{$IFDEF BigNumbers}
else if ( fMode = ecmBigInteger ) then
begin
if V.BigInteger.IsEven then
V.BigInteger := 1
else
V.BigInteger := 0;
end
{$ENDIF BigNumbers}