std-bittoggle | ![]() |
std-bittoggle inverses the bit of all set bits of val on the flag.
It used for example in changing OSMODE settings, to turn on or off some bits in a flag at once. A flag is used to store independent logical values in a single integer number. It uses bit values and not bit positions because the online help for flags usesbit values too, such as the initget flag: 1,2,4,8,16,32,64,128. A bitvalue of 41 is (1+8+32)
(std-bittoggle 41 129) => 168 (= 128+8+32) 41 = 1+8+32 129 = 1+128
val: An integer number representing a bitvalue or a sum of bitvalues.
flag: A integer number representing a flag, a logical sum of bitvalues.
A integer number, the new flag.
None.
(std-require 'STDMATH)
Defined in STDMATH