Exemplo n.º 1
0
// Read the next outer message from the buffer.
func (p *Parser) readOuterMessage() (*outerMessage, error) {
	// Read a command header, which includes both the message type
	// well as a flag to determine whether or not whether or not the
	// message is compressed with snappy.
	command := dota.EDemoCommands(p.reader.readVarUint32())

	// Extract the type and compressed flag out of the command
	msgType := int32(command & ^dota.EDemoCommands_DEM_IsCompressed)
	msgCompressed := (command & dota.EDemoCommands_DEM_IsCompressed) == dota.EDemoCommands_DEM_IsCompressed

	// Read the tick that the message corresponds with.
	tick := p.reader.readVarUint32()

	// This appears to actually be an int32, where a -1 means pre-game.
	if tick == 4294967295 {
		tick = 0
	}

	// Read the size and following buffer.
	size := int(p.reader.readVarUint32())
	buf := p.reader.readBytes(size)

	// If the buffer is compressed, decompress it with snappy.
	if msgCompressed {
		var err error
		if buf, err = snappy.Decode(nil, buf); err != nil {
			return nil, err
		}
	}

	// Return the message
	msg := &outerMessage{
		tick:   tick,
		typeId: msgType,
		data:   buf,
	}
	return msg, nil
}
Exemplo n.º 2
0
// readCommand reads a varuint32 as an EDemoCommands
func (s *stream) readCommand() (dota.EDemoCommands, error) {
	c, err := s.readVarUint32()
	return dota.EDemoCommands(c), err
}