diff --git a/bit_manipulation/highest_set_bit.py b/bit_manipulation/highest_set_bit.py new file mode 100644 index 000000000..21d92dcb9 --- /dev/null +++ b/bit_manipulation/highest_set_bit.py @@ -0,0 +1,34 @@ +def get_highest_set_bit_position(number: int) -> int: + """ + Returns position of the highest set bit of a number. + Ref - https://graphics.stanford.edu/~seander/bithacks.html#IntegerLogObvious + >>> get_highest_set_bit_position(25) + 5 + >>> get_highest_set_bit_position(37) + 6 + >>> get_highest_set_bit_position(1) + 1 + >>> get_highest_set_bit_position(4) + 3 + >>> get_highest_set_bit_position(0) + 0 + >>> get_highest_set_bit_position(0.8) + Traceback (most recent call last): + ... + TypeError: Input value must be an 'int' type + """ + if not isinstance(number, int): + raise TypeError("Input value must be an 'int' type") + + position = 0 + while number: + position += 1 + number >>= 1 + + return position + + +if __name__ == "__main__": + import doctest + + doctest.testmod()