lognot

Type:	-	function (subr)
Source:	-	xlmath.c

Syntax

(lognot expr)

expr - an integer expression
returns - the bitwise inversion of number

Description

The 'lognot' function returns the logical bitwise inversion of the expression.

Examples

(lognot 255)                 ; returns -256
(lognot #xffff0000)          ; returns 65535
(lognot #x00000000)          ; returns -1
(lognot 1)                   ; returns -2

(logand (lognot 256) 65535)  ; returns 65279
(lognot #xFFFFFFFE)          ; returns 1
(lognot #xFFFFFFFC)          ; returns 3

Note: XLISP does not check when read-macro expansions like '#x0FF' are out of bounds. It gives no error message and will just truncate the number to the low-order bits that it can deal with [usually 32 bits or 8 hex digits].

See the lognot function in the XLISP 2.0 manual.

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