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ANSI Common Lisp  12 Numbers 12.2 Dictionary of Numbers
| 12.2.70 ldb-test |
Function |
- Syntax:
-
ldb-test
bytespec integer
 generalized-boolean
- Arguments and Values:
-
bytespec - a byte specifier.
integer - an integer.
generalized-boolean - a generalized boolean.
- Description:
-
Returns true if any of the bits of the byte in integer
specified by bytespec is non-zero; otherwise returns false.
- Examples:
-
(ldb-test (byte 4 1) 16) true
(ldb-test (byte 3 1) 16) false
(ldb-test (byte 3 2) 16) true
- See Also:
-
byte, ldb, zerop
- Notes:
-
(ldb-test bytespec n) ==
(not (zerop (ldb bytespec n))) ==
(logtest (ldb bytespec -1) n)
- Allegro CL Implementation Details:
-
None.
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