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##
# .protocol.version
##
'PQ version class'
from struct import Struct
version_struct = Struct('!HH')
class Version(tuple):
"""Version((major, minor)) -> Version
Version serializer and parser.
"""
major = property(fget = lambda s: s[0])
minor = property(fget = lambda s: s[1])
def __new__(subtype, major_minor : '(major, minor)'):
(major, minor) = major_minor
major = int(major)
minor = int(minor)
# If it can't be packed like this, it's not a valid version.
try:
version_struct.pack(major, minor)
except Exception as e:
raise ValueError("unpackable major and minor") from e
return tuple.__new__(subtype, (major, minor))
def __int__(self):
return (self[0] << 16) | self[1]
def bytes(self):
return version_struct.pack(self[0], self[1])
def __repr__(self):
return '%d.%d' %(self[0], self[1])
def parse(self, data):
return self(version_struct.unpack(data))
parse = classmethod(parse)
CancelRequestCode = Version((1234, 5678))
NegotiateSSLCode = Version((1234, 5679))
V2_0 = Version((2, 0))
V3_0 = Version((3, 0))
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