func ExampleUnmarshal() {
msg, s, err := capnp.NewMessage(capnp.SingleSegment(nil))
if err != nil {
fmt.Printf("allocation error %v\n", err)
return
}
d, err := air.NewRootZdate(s)
if err != nil {
fmt.Printf("root error %v\n", err)
return
}
d.SetYear(2004)
d.SetMonth(12)
d.SetDay(7)
data, err := msg.Marshal()
if err != nil {
fmt.Printf("marshal error %v\n", err)
return
}
// Read
msg, err = capnp.Unmarshal(data)
if err != nil {
fmt.Printf("unmarshal error %v\n", err)
return
}
d, err = air.ReadRootZdate(msg)
if err != nil {
fmt.Printf("read root error %v\n", err)
return
}
fmt.Printf("year %d, month %d, day %d\n", d.Year(), d.Month(), d.Day())
// Output:
// year 2004, month 12, day 7
}
// actually return n segments back-to-back.
// WriteTo will automatically add the stream header word with message length.
//
func zdateReaderNBackToBack(n int, packed bool) *bytes.Reader {
buf := bytes.Buffer{}
for i := 0; i < n; i++ {
msg, seg, err := capnp.NewMessage(capnp.SingleSegment(nil))
if err != nil {
panic(err)
}
d, err := air.NewRootZdate(seg)
if err != nil {
panic(err)
}
d.SetMonth(12)
d.SetDay(7)
d.SetYear(int16(2004 + i))
if packed {
b, err := msg.MarshalPacked()
if err != nil {
panic(err)
}
buf.Write(b)
} else {
b, err := msg.Marshal()
if err != nil {
panic(err)
}
buf.Write(b)
}
}
return bytes.NewReader(buf.Bytes())
}