nickelpro
/ mcvarint.py
Created
November 5, 2013 02:20
Two python functions that implement the new Minecraft varint type (32-bit signed integers packed into Google protobuf varints). Packs varints into a byte string, unpacks varints from a buffer that has a read(bytes) method. Supports negative numbers even though they aren't used in the current protocol.
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| import struct | |
| def pack_varint(val): | |
| total = b'' | |
| if val < 0: | |
| val = (1<<32)+val | |
| while val>=0x80: | |
| bits = val&0x7F | |
| val >>= 7 | |
| total += struct.pack('B', (0x80|bits)) |