Function beginMessage

pgproto3/pgproto3.go:104–109

beginMessage begins a new message of type t. It appends the message type and a placeholder for the message length to dst. It returns the new buffer and the position of the message length placeholder.

(dst []byte, t byte)

// beginMessage begins a new message of type t. It appends the message type and a placeholder for the message length to
// dst. It returns the new buffer and the position of the message length placeholder.
func beginMessage(dst []byte, t byte) ([]byte, int) {
	dst = append(dst, t)
	sp := len(dst)
	dst = pgio.AppendInt32(dst, -1)
	return dst, sp
}

// finishMessage finishes a message that was started with beginMessage. It computes the message length and writes it to
// dst[sp]. If the message length is too large it returns an error. Otherwise it returns the final message buffer.