logtest
logtest Function
Syntax:
logtest integer-1 integer-2 → generalized-boolean
Arguments and Values:
integer-1—an integer .
integer-2—an integer .
generalized-boolean—a generalized boolean.
Description:
Returns true if any of the bits designated by the 1’s in integer-1 is 1 in integer-2; otherwise it is false. integer-1 and integer-2 are treated as if they were binary.
Negative integer-1 and integer-2 are treated as if they were represented in two’s-complement binary.
Examples:
(logtest 1 7) → true
(logtest 1 2) → false
(logtest -2 -1) → true
(logtest 0 -1) → false
Exceptional Situations:
Should signal an error of type type-error if integer-1 is not an integer . Should signal an error of type type-error if integer-2 is not an integer .
Notes:
(logtest x y) ≡ (not (zerop (logand x y)))
Expanded Reference: logtest
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(logtest )