You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
35 lines
846 B
Python
35 lines
846 B
Python
from typing import Any
|
|
|
|
|
|
def get_bit(bit_string: Any, bit_id: int) -> bool:
|
|
"""
|
|
Interprets bit number `bit_id` from the right (lsb) of `bit_string` as a boolean
|
|
|
|
Args:
|
|
bit_string: Bit string to test
|
|
bit_id: Bit number, 0-indexed from the right (lsb)
|
|
|
|
Returns:
|
|
Boolean value of the requested bit
|
|
"""
|
|
return bit_string & (1 << bit_id) != 0
|
|
|
|
|
|
def set_bit(bit_string: Any, bit_id: int, value: bool) -> Any:
|
|
"""
|
|
Returns `bit_string`, with bit number `bit_id` set to boolean `value`.
|
|
|
|
Args:
|
|
bit_string: Bit string to alter
|
|
bit_id: Bit number, 0-indexed from right (lsb)
|
|
value: Boolean value to set bit to
|
|
|
|
Returns:
|
|
Altered `bit_string`
|
|
"""
|
|
mask = (1 << bit_id)
|
|
bit_string &= ~mask
|
|
if value:
|
|
bit_string |= mask
|
|
return bit_string
|