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NutStomper

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3 posts in this topic

#1 ·  Posted (edited)

blankl.png Edited by NutStomper

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#2 ·  Posted (edited)

You assume right. Basically you're treating the integer as if it was 64-bit and you shift it by 32. In this case you'll have to split the integer into two 32-bit values (high and low bit pair) and perform bitwise operation on the pair. I'm rather rusty in bitwise operations but some trail and error gave me this working script:

Local $a = 51162856125 ; = 97 * 0x1F7047DD
Local $aLow = BitAND($a / 4294967296, 0xFFFFFFFF) ; 4294967296 = 2^32, mask high bits.
Local $aHigh = BitAND(Mod($a, 4294967296), 0x00000000) ; mask low bits.
Local $b = BitShift($aLow, 32) + BitShift($aHigh, 32) ; shift
MsgBox(0, '', $b) ; 11

Your mileage may vary.

[edit] I'm unaware of any UDF that deals with bitwise operators btw. [/edit]

Edited by dany

[center]Spiderskank Spiderskank[/center]GetOpt Parse command line options UDF | AU3Text Program internationalization UDF | Identicon visual hash UDF

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#3 ·  Posted (edited)

Glad it worked out. I also rolled a function out of it when I got a flashback. I've already seen a function called _BitShift64(), it's in Ward's Totally forgotten about it.

[edit] Oops:

Local $aLow = BitAND($a / 4294967296, 0xFFFFFFFF) ; 4294967296 = 2^32, mask high bits. <<<<<<<<< Actually $aHigh
Local $aHigh = BitAND(Mod($a, 4294967296), 0x00000000) ; mask low bits.<<<<<<<<< Actually $aLow

[/edit]

Edited by dany

[center]Spiderskank Spiderskank[/center]GetOpt Parse command line options UDF | AU3Text Program internationalization UDF | Identicon visual hash UDF

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