BitTest: Difference between revisions
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This function performs an AND-conjunction on two or more (unsigned) 32-bit [[Int|integers]] and checks, whether the conjuncted value is zero or not. See [http://en.wikipedia.org/wiki/Bitwise_operation#AND Bitwise operation] for more details. | This function performs an AND-conjunction on two or more (unsigned) 32-bit [[Int|integers]] and checks, whether the conjuncted value is zero or not. See [http://en.wikipedia.org/wiki/Bitwise_operation#AND Bitwise operation] for more details. | ||
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Revision as of 12:07, 2 June 2013
This function performs an AND-conjunction on two or more (unsigned) 32-bit integers and checks, whether the conjuncted value is zero or not. See Bitwise operation for more details.
Syntax
bool bitTest ( uint var1, uint var2, ... )
Required arguments
- varN: The value you want to perform the operation on (see above)
Returns
Returns true if the conjuncted value is not zero, false otherwise. If a bad argument was passed to bitTest, you'll get nil.
Example
local flags = 0x23 -- binary: 100011b
local mask = 0x20 -- binary: 100000b
-- Check if bit 1 is set
if bitTest(flags, mask) then
outputDebugString"Yeah. It's set"
else
outputDebugString"I'm sorry ;("
end