SetBit

[Possemo]

Hi I just don’t get how to set bits in a byte. Extracting bits is very easy and is working perfectly.

	by=CtrlrLuaBigInteger(0)
	by:setBit(1,7)

This throws the following error:

At line [-1]: [C]
What: C
Namewhat: method
Name: setBit
Error message: No matching overload found, candidates:
void setBit(CtrlrLuaBigInteger&,int,bool)

Could someone point me in the right direction?
Thanks

[atom]

You specify the position and a true/false value if the bit should be set or not

so to set bit 7

setBit(7,true)
to clear bit 7
setBit(7,false)

etc.

[Possemo]

Thanks atom, now I see that the error message was quite clear…

[Possemo]

I am stuck again. Maybe someone could help?

	-- Byte 48 ***********************************************************
	byte48=CtrlrLuaBigInteger(0)
	APorta=panel:getModulatorByName("UpperPortamentoSw"):getModulatorValue()
	BHold =panel:getModulatorByName("LowerHoldSwitch")  :getModulatorValue()

	    if APorta==0 then byte48:setBit(4,false)
	elseif APorta==1 then byte48:setBit(4,true)
	end
	    if BHold ==0 then byte48:setBit(2,false)
	elseif BHold ==1 then byte48:setBit(2,true)
	end
	PatchTable[49]=string.format("%.2x",Byte48)

The last line does not work. I cannot write the Byte into the Table:

Error message: [string “putToLibrary”]:179: bad argument #2 to ‘format’ (number expected, got userdata)

How can I convert the userdata into something useable, like a number or a string?

Thanks for reading 🙂

[atom]

Have a look at the BigInteger documentation http://www.juce.com/doc/classBigInteger

or just do what(Byte48) to see all methods registered for any object in Lua, there is a toInteger() method that you can use in this case.

[Possemo]

thanks atom! It pointed me in the right direction.
This worked for me:

byte32=CtrlrLuaBigInteger(0)

byte32:setBit(2,true)
byte32:setBit(0,true)

teststring=byte32:toString(16,2)

The string shows the number as Hex(16) with two digits(2)

[Possemo]

No, this was not right. We get still userdata with toString() method. As you said for this we need the toInteger method:

byte56=CtrlrLuaBigInteger(0)

byte56:setBit(6,true)
byte56:setBit(3,true)

integerValue=byte56:getBitRangeAsInt(0,8)

start from first Bit(0), range is eight Bits(8)

Edit: Oops, it seems that for this you have to define the range as eight Bits(8). I don’t need the 8th Bit but it gave wrong results with a range of 7 Bits…

• This reply was modified 8 years, 3 months ago by Possemo.
• This reply was modified 8 years, 3 months ago by Possemo.

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