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The bitwise library contains useful functions for bitwise operations. Make sure you're familiar with Bitwise Operators

Methods

number bit.arshift( number value, number shiftCount )

Returns the arithmetically shifted value.

number bit.band( number value, ... )

Performs the bitwise and for all values specified.

number bit.bnot( number value )

Returns the bitwise not of the value.

number bit.bor( number value1, vararg ... )

Returns the bitwise OR of all values specified.

number bit.bswap( number value )

Swaps the byte order.

number bit.bxor( number value, number otherValues = nil )

Returns the bitwise xor of all values specified.

number bit.lshift( number value, number shiftCount )

Returns the left shifted value. The returned value will be clamped to a signed 32-bit integer, even on 64-bit builds.

number bit.rol( number value, number shiftCount )

Returns the left rotated value.

number bit.ror( number value, number shiftCount )

Returns the right rotated value.

number bit.rshift( number value, number shiftCount )

Returns the right shifted value. The returned value will be clamped to a signed 32-bit integer, even on 64-bit builds.

number bit.tobit( number value )

Normalizes the specified value and clamps it in the range of a signed 32bit integer.

string bit.tohex( number value, number digits = 8 )

Returns the hexadecimal representation of the number with the specified digits.

Example

Displays some bitwise operator functionality.

local mybits = 0 mybits = bit.bor(mybits, 2) -- Add 2 4 and 8 to mybits mybits = bit.bor(mybits, 4) mybits = bit.bor(mybits, 8) print(bit.band(mybits, 4) == 4) -- Does mybits have 4? mybits = bit.band(mybits, bit.bnot(4)) -- Remove 4 from mybits print(bit.band(mybits, 4) == 4) -- Does mybits have 4? print(bit.band(mybits, 2) == 2) -- Does mybits have 2?

Output:

true false true

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