import struct

PacketIDs = {
    "KeepAlive": 0x00,
    "LoginRequest": 0x01,
    "Handshake": 0x02,
    "ChatMessage": 0x03,
    "TimeUpdate": 0x04,
    "EntityEquipment": 0x05,
    "SpawnPosition": 0x06,
    "UseEntity": 0x07,
    "UpdateHealth": 0x08,
    "Respawn": 0x09,
    "Player": 0x0a
}

PacketFormats = {
    PacketIDs["KeepAlive"]: ">B",
    PacketIDs["LoginRequest"]: ">Bi64slB",
    PacketIDs["Handshake"]: ">B64s",
    PacketIDs["ChatMessage"]: ">B64s",
    PacketIDs["TimeUpdate"]: ">Bl",
    PacketIDs["EntityEquipment"]: ">Bihhh",
    PacketIDs["SpawnPosition"]: ">Biii",
    PacketIDs["UseEntity"]: ">Bii?",
    PacketIDs["UpdateHealth"]: ">Bh",
    PacketIDs["Respawn"]: ">BB",
    PacketIDs["Player"]: ">B?"
}

PacketSizes = {}
for k, v in PacketFormats.iteritems():
    PacketSizes[k] = struct.calcsize(v)