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Add function for highest set bit location #7586

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Oct 26, 2022
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34 changes: 34 additions & 0 deletions bit_manipulation/highest_set_bit.py
Original file line number Diff line number Diff line change
@@ -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(0.8)
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
if number == 0:
break

return position


if __name__ == "__main__":
import doctest

doctest.testmod()