— procedure: bit-string-zero? bit-string

Returns #t if bit-string contains only 0 bits; otherwise returns #f.

— procedure: bit-string=? bit-string-1 bit-string-2

Compares the two bit string arguments and returns #t if they are the same length and contain the same bits; otherwise returns #f.

— procedure: bit-string-not bit-string

Returns a newly allocated bit string that is the bitwise-logical negation of bit-string.

— procedure: bit-string-movec! target-bit-string bit-string

The destructive version of bit-string-not. The arguments target-bit-string and bit-string must be bit strings of the same length. The bitwise-logical negation of bit-string is computed and the result placed in target-bit-string. The value of this procedure is unspecified.

— procedure: bit-string-and bit-string-1 bit-string-2

Returns a newly allocated bit string that is the bitwise-logical “and” of the arguments. The arguments must be bit strings of identical length.

— procedure: bit-string-andc bit-string-1 bit-string-2

Returns a newly allocated bit string that is the bitwise-logical “and” of bit-string-1 with the bitwise-logical negation of bit-string-2. The arguments must be bit strings of identical length.

— procedure: bit-string-or bit-string-1 bit-string-2

Returns a newly allocated bit string that is the bitwise-logical “inclusive or” of the arguments. The arguments must be bit strings of identical length.

— procedure: bit-string-xor bit-string-1 bit-string-2

Returns a newly allocated bit string that is the bitwise-logical “exclusive or” of the arguments. The arguments must be bit strings of identical length.

— procedure: bit-string-and! target-bit-string bit-string
— procedure: bit-string-or! target-bit-string bit-string
— procedure: bit-string-xor! target-bit-string bit-string
— procedure: bit-string-andc! target-bit-string bit-string

These are destructive versions of the above operations. The arguments target-bit-string and bit-string must be bit strings of the same length. Each of these procedures performs the corresponding bitwise-logical operation on its arguments, places the result into target-bit-string, and returns an unspecified result.