mirc/identifiers/$not

Returns the binary NOT of N as an unsigned 32-bit number

Synopsis

$not(<N>)

Parameters

N = Base-10 Number in the range +/- 2^32-1

Properties

None

Example

NOT returns the binary NOT of <N>. It returns 0 if the bit is 1, and returns 1 if the bit is 0. In effect, every 1-bit in the result toggles the 0/1 state of the corresponding bit of the input number

//var %n 5 | echo -a $not(%n) $base($not(%n),10,16)
; 4294967290 FFFFFFFA

Here's how the answer was calculated:

Convert base-10 N to binary. If N is negative, treat as if a signed 32-bit number where the leftmost bit is a 1.
Flip each 0-bit to 1, and each 1-bit to 0
Convert the answer from binary to base 10.

//var %n 5 | echo -a $base(%n,10,2,32) | echo -a $str(-,32) | echo -a $base($not(5),10,2,32) 
; returns:
00000000000000000000000000000101
--------------------------------
11111111111111111111111111111010

//var %n1 4294967290 | var %n2 -6 | echo -a %n1 is the signed representation of %n2 so $not(%n1) is the same as $not(%n2)
; returns: 4294967290 is the signed representation of -6 so 5 is the same as 5

//var %n $calc(2^32 ) | echo -a $not(%n)
; returns 0 because N is too large

; mIRC doesn't have the $neg function, but if it did, $not(N) would be $neg(N) less 1.
//var %n 5 | echo -s $not(%n) is the same as $calc( -%n -1) so NOT of each is the same: $not($not(%n)) is the same as $not($calc( -%n -1))

Compatibility

Added: mIRC v5.61
Added on: 23 Sep 1999
Note: Unless otherwise stated, this was the date of original functionality.
Further enhancements may have been made in later versions.

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