py-libp2p/muxer/mplex/utils.py
2018-11-11 17:55:50 -05:00

26 lines
550 B
Python

def encode_uvarint(number):
"""Pack `number` into varint bytes"""
buf = b''
while True:
towrite = number & 0x7f
number >>= 7
if number:
buf += bytes((towrite | 0x80, ))
else:
buf += bytes((towrite, ))
break
return buf
def decode_uvarint(buff, index):
shift = 0
result = 0
while True:
i = buff[index]
result |= (i & 0x7f) << shift
shift += 7
if not i & 0x80:
break
index += 1
return result, index