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How to write in Lua Binary value??

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Meiyoh
Master Cheater

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Joined: 14 Mar 2015
Posts: 400

Posted: Mon Mar 05, 2018 2:48 am Post subject: How to write in Lua Binary value??

HOW To write to Binary 5 with Length 5 in lua? Can someone tell me? _________________ I am the forgotten one the dead one.

Dark Byte
Site Admin

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Joined: 09 May 2003
Posts: 25294
Location: The netherlands

Posted: Mon Mar 05, 2018 4:19 am Post subject:

Code:

function write5BitLongValueAtPos(value, bitvalue, bitpos)
return (value & (~(0x1f << bitpos))) | (bitvalue << bitpos)
end

0x1f is binary 11111
0x1f << bitpos means shift the bitmask 'bitpos' times to the left (e.g 2 turns into: 1111100)

~(1111100) turns into 11111111111111111111111110000011

value & the bitshifted mask zeroes out the bits that used to be at that position

(bitvalue << bitpos) moves the value to the specific binary position

value | shifted bitvalue , OR's the bits of bitvalue at the specific spot. And since earlier those bits got set to 0, that means the new value is the value you want
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Last edited by Dark Byte on Mon Mar 05, 2018 4:20 am; edited 1 time in total

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