PLKIT GetAsDouble can not reference past values of variable!

radekj · Postby **radekj** » 07 Oct 2010

You can not reference past value of variable via
IEasyLanguageVariable interface ! BUG !

Exampel:

void __stdcall mycalc( IEasyLanguageObject *pEL, ...
{
IEasyLanguageVariable *pVar = pEL->Variables["mydata"];
myvalue = pVar->GetAsDouble[0]; //return current value of variable "mydata"
myvalue1 = pVar->GetAsDouble[1]; //return still current value and not value of mydata[1], <- BUG !!!;

ciao
radekj

Dave Masalov · Postby **Dave Masalov** » 11 Oct 2010

Dear radekj,

Everything works fine on our end. Here is the example of the code:

Code: Select all

external: "c:\mcdll.dll", void, "mycalc", IEasyLanguageObject, string, double ;

var:

mydata(0);



value1 = mydata[10];

mycalc( self, "mydata", 200 ) ;



Plot1(mydata[1]);

And DLL file:

void __stdcall mycalc(IEasyLanguageObject* pEL, LPCSTR varName, double newprice)
{
IEasyLanguageVariable *pVar = pEL->Variables[ varName ] ;
if ( pVar )
pVar->AsDouble[1] = newprice;
}

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radekj · Postby **radekj** » 17 Oct 2010

"pVar->AsDouble[1]" points to value of "pVar->AsDouble[0]"

and NOT of pVar->AsDouble[1] !

ciao
radekj

Dave Masalov · Postby **Dave Masalov** » 27 Oct 2010

Dear radekj,

Please find attached the archive showing that it is working fine.

Please note that only serial variables may have different previous values. For simple variables previous value is equal to current value.

Code: Select all


// C++ code



double __stdcall GetPrevValue(IEasyLanguageObject* pEL, LPCSTR varName)

{

	double res = 0;

	IEasyLanguageVariable *pVar = pEL->Variables[ varName ] ;

	if ( pVar )

		res = pVar->AsDouble[1];

	return res;

}



//------------------------

// PL Script



external: "mcdll.dll", double, "GetPrevValue", IEasyLanguageObject, string;

var:

mydata(0);



value2 = mydata[1]; // make variable mydata serial.



mydata = close;

value1 = GetPrevValue( self, "mydata");



if currentbar > 1 then

begin

Plot1(mydata);

Plot2(value1);

end;

Screenshot and pla archive:

screen.PNG
arhive.pla

PLKIT GetAsDouble can not reference past values of variable!

PLKIT GetAsDouble can not reference past values of variable!

Re: PLKIT GetAsDouble can not reference past values of varia

Re: PLKIT GetAsDouble can not reference past values of varia

Re: PLKIT GetAsDouble can not reference past values of varia