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byte, byte-size, byte-position [Function]

byte size position => bytespec

byte-size bytespec => size

byte-position bytespec => position

Arguments and Values::

size, position--a non-negative integer.

bytespec--a byte specifier.

Description::

byte returns a byte specifier that indicates a byte of width size and whose bits have weights 2^position + size - 1\/ through 2^position, and whose representation is implementation-dependent.

byte-size returns the number of bits specified by bytespec.

byte-position returns the position specified by bytespec.

Examples::

      (setq b (byte 100 200)) =>  #<BYTE-SPECIFIER size 100 position 200>
      (byte-size b) =>  100
      (byte-position b) =>  200
     

See Also::

ldb , dpb

Notes::

      (byte-size (byte j k)) == j
      (byte-position (byte j k)) == k
     

A byte of size of 0 is permissible; it refers to a byte of width zero. For example,

      (ldb (byte 0 3) #o7777) =>  0
      (dpb #o7777 (byte 0 3) 0) =>  0