30 lines
889 B
Python
30 lines
889 B
Python
from struct import pack, unpack, calcsize
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def message(tp, *values):
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strtype = type('')
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typecodes = ['']
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for v in values:
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if type(v) is strtype:
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typecodes.append('%ds' % len(v))
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elif 0 <= v < 256:
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typecodes.append('B')
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else:
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typecodes.append('l')
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typecodes = ''.join(typecodes)
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assert len(typecodes) < 256
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return pack(("!B%dsc" % len(typecodes)) + typecodes,
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len(typecodes), typecodes, tp, *values)
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def decodemessage(data):
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if data:
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limit = ord(data[0]) + 1
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if len(data) >= limit:
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typecodes = "!c" + data[1:limit]
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end = limit + calcsize(typecodes)
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if len(data) >= end:
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return unpack(typecodes, data[limit:end]), data[end:]
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#elif end > 1000000:
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# raise OverflowError
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return None, data
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