bit-not bit-array &optional opt-arg → resulting-bit-array

bit-array, bit-array1, bit-array2 — a bit array.

Opt-arg — a bit array, or t, or nil. The default is nil.

Bit-array, bit-array1, bit-array2, and opt-arg (if an array) must all be of the same rank and dimensions.

resulting-bit-array — a bit array.

These functions perform bit-wise logical operations on bit-array1 and bit-array2 and return an array of matching rank and dimensions, such that any given bit of the result is produced by operating on corresponding bits from each of the arguments.

In the case of bit-not, an array of rank and dimensions matching bit-array is returned that contains a copy of bit-array with all the bits inverted.

If opt-arg is of type (array bit) the contents of the result are destructively placed into opt-arg. If opt-arg is the symbol t, bit-array or bit-array1 is replaced with the result; if opt-arg is nil or omitted, a new array is created to contain the result.

Figure 15–4 indicates the logical operation performed by each of the functions.

 (bit-and (setq ba #*11101010) #*01101011) → #*01101010 
 (bit-and #*1100 #*1010) → #*1000 
 (bit-andc1 #*1100 #*1010) → #*0010 
 (setq rba (bit-andc2 ba #*00110011 t)) → #*11001000 
 (eq rba ba) → true 
 (bit-not (setq ba #*11101010)) → #*00010101 
 (setq rba (bit-not ba 
                     (setq tba (make-array 8 
                                           :element-type 'bit)))) 
→ #*00010101 
 (equal rba tba) → true 
 (bit-xor #*1100 #*1010) → #*0110

lognot, logand