Coverage for /usr/lib/python3/dist-packages/fontTools/misc/intTools.py: 60%

1__all__ = ["popCount", "bit_count", "bit_indices"] 

2 

3 

4try: 

5 bit_count = int.bit_count 

6except AttributeError: 

7 

8 def bit_count(v): 

9 return bin(v).count("1") 

10 

11 

12"""Return number of 1 bits (population count) of the absolute value of an integer. 

13 

14See https://docs.python.org/3.10/library/stdtypes.html#int.bit_count 

15""" 

16popCount = bit_count # alias 

17 

18 

19def bit_indices(v): 

20 """Return list of indices where bits are set, 0 being the index of the least significant bit. 

21 

22 >>> bit_indices(0b101) 

23 [0, 2] 

24 """ 

25 return [i for i, b in enumerate(bin(v)[::-1]) if b == "1"]