Total rework HAP pkg and HomeKit source

pkg/hap/event_reader.go

@@ -0,0 +1,68 @@
+package hap
+
+import (
+	"io"
+	"os"
+	"time"
+)
+
+type EventReader struct {
+	r    io.Reader
+	ch   chan []byte
+	err  error
+	left []byte
+}
+
+func NewEventReader(r io.Reader) *EventReader {
+	e := &EventReader{r: r, ch: make(chan []byte, 1)}
+	go e.background()
+	return e
+}
+
+func (e *EventReader) background() {
+	b := make([]byte, 32*1024)
+	for {
+		n, err := e.r.Read(b)
+		if err != nil {
+			e.err = err
+			return
+		}
+
+		if n >= 6 && string(b[:6]) == "EVENT " {
+			panic("TODO")
+		}
+
+		// copy because will be overwriten
+		buf := make([]byte, n)
+		copy(buf, b)
+		e.ch <- buf
+	}
+}
+
+func (e *EventReader) Read(p []byte) (n int, err error) {
+	if e.err != nil {
+		return 0, e.err
+	}
+
+	// if something left after previous reading
+	if e.left != nil {
+		// if still something left
+		if n = copy(p, e.left); n < len(e.left) {
+			e.left = e.left[n:]
+		} else {
+			e.left = nil
+		}
+		return
+	}
+
+	select {
+	case <-time.After(time.Second * 5):
+		return 0, os.ErrDeadlineExceeded
+	case b := <-e.ch:
+		if n = copy(p, b); n < len(b) {
+			e.left = b[n:]
+		}
+	}
+
+	return
+}