Bitmask Deciphering UDF

Keywords:   bitmask deciphering listbits UDF

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Question:

How do you decipher what a bitmask value is (what bits are set)?

Answer:

#DefineFunction ListBits(bitmask)
	bitstring = ""
	bit = 1
	While bitmask	 ;while there's still a bitmask value
		If bitmask & bit  ;check bit
			bitstring = StrCat(bitstring, bit, @CRLF)
			bitmask = bitmask & ~bit  ;decrement working bitmask number by existing byte increments
		Endif
		bit = bit * 2  ;increment byte
	EndWhile
	
	Return (bitstring)
#EndFunction


bitmask = 10776
;bitmask = -1610612736
bitstring = ListBits(bitmask)
Message("Bits in bitmask", bitstring)

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Article ID:   W14985