45 lines
914 B
Python
45 lines
914 B
Python
import asyncio
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import struct
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def encode_uvarint(number):
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"""Pack `number` into varint bytes"""
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buf = b''
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while True:
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towrite = number & 0x7f
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number >>= 7
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if number:
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buf += bytes((towrite | 0x80, ))
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else:
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buf += bytes((towrite, ))
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break
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return buf
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def decode_uvarint(buff, index):
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shift = 0
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result = 0
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while True:
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i = buff[index]
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result |= (i & 0x7f) << shift
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shift += 7
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if not i & 0x80:
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break
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index += 1
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return result, index + 1
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async def decode_uvarint_from_stream(reader):
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shift = 0
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result = 0
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while True:
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byte = await asyncio.wait_for(reader.read(1), timeout=5)
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i = struct.unpack('>H', b'\x00' + byte)[0]
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result |= (i & 0x7f) << shift
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shift += 7
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if not i & 0x80:
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break
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return result
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