async def read_delim(reader: Reader) -> bytes:
msg_bytes = await read_varint_prefixed_bytes(reader)
if len(msg_bytes) == 0:
raise ParseError(f"`len(msg_bytes)` should not be 0")
if msg_bytes[-1:] != b"\n":
raise ParseError(
f'`msg_bytes` is not delimited by b"\\n": `msg_bytes`={msg_bytes!r}'
)
return msg_bytes[:-1]
async def decode_uvarint_from_stream(reader: Reader) -> int:
"""
https://en.wikipedia.org/wiki/LEB128
"""
res = 0
for shift in itertools.count(0, 7):
if shift > SHIFT_64_BIT_MAX:
raise ParseError(
"TODO: better exception msg: Integer is too large...")
byte = await reader.read(1)
try:
value = byte[0]
except IndexError:
raise ParseError(
"Unexpected end of stream while parsing LEB128 encoded integer"
)
res += (value & LOW_MASK) << shift
if not value & HIGH_MASK:
break
return res
async def decode_uvarint_from_stream(reader: Reader) -> int:
"""https://en.wikipedia.org/wiki/LEB128."""
res = 0
for shift in itertools.count(0, 7):
if shift > SHIFT_64_BIT_MAX:
raise ParseError(
"TODO: better exception msg: Integer is too large...")
byte = await read_exactly(reader, 1)
value = byte[0]
res += (value & LOW_MASK) << shift
if not value & HIGH_MASK:
break
return res