ldb-test [Function]

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::

@xref{byte; byte-size; byte-position} , section ldb [Accessor] , section zerop [Function]

Notes::

 (ldb-test bytespec n) ==
 (not (zerop (ldb bytespec n))) ==
 (logtest (ldb bytespec -1) n)

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