Method parse

parser.go:77–418

parse is the fast protocol parser engine.

(buf []byte)

// parse is the fast protocol parser engine.
func (nc *Conn) parse(buf []byte) error {
	var i int
	var b byte

	// Move to loop instead of range syntax to allow jumping of i
	for i = 0; i < len(buf); i++ {
		b = buf[i]

		switch nc.ps.state {
		case OP_START:
			switch b {
			case 'M', 'm':
				nc.ps.state = OP_M
				nc.ps.hdr = -1
				nc.ps.ma.hdr = -1
			case 'H', 'h':
				nc.ps.state = OP_H
				nc.ps.hdr = 0
				nc.ps.ma.hdr = 0
			case 'P', 'p':
				nc.ps.state = OP_P
			case '+':
				nc.ps.state = OP_PLUS
			case '-':
				nc.ps.state = OP_MINUS
			case 'I', 'i':
				nc.ps.state = OP_I
			default:
				goto parseErr
			}
		case OP_H:
			switch b {
			case 'M', 'm':
				nc.ps.state = OP_M
			default:
				goto parseErr
			}
		case OP_M:
			switch b {
			case 'S', 's':
				nc.ps.state = OP_MS
			default:
				goto parseErr
			}
		case OP_MS:
			switch b {
			case 'G', 'g':
				nc.ps.state = OP_MSG
			default:
				goto parseErr
			}
		case OP_MSG:
			switch b {
			case ' ', '\t':
				nc.ps.state = OP_MSG_SPC
			default:
				goto parseErr
			}