func (m *Msg) Pack() []byte {
buf := make([]byte, 0, 100)
var n [8]byte
if m.Op<Tmin || m.Op>=Tend {
dbg.Fatal("unknown msg type %d", m.Op)
}
buf = append(buf, byte(m.Op))
buf = nchan.PutString(buf, m.Rid)
if m.Op==Tget || m.Op==Tput {
binary.LittleEndian.PutUint64(n[0:], uint64(m.Off))
buf = append(buf, n[:8]...)
}
if m.Op == Tget {
binary.LittleEndian.PutUint64(n[0:], uint64(m.Count))
buf = append(buf, n[:8]...)
}
if m.Op==Tput || m.Op==Tmkdir || m.Op==Twstat {
buf = append(buf, m.D.Pack()...)
}
if m.Op == Tmove {
buf = nchan.PutString(buf, m.To)
}
if m.Op==Tfind || m.Op==Tget || m.Op==Tput || m.Op==Tfindget {
buf = nchan.PutString(buf, m.Pred)
}
if m.Op==Tfind || m.Op==Tfindget {
buf = nchan.PutString(buf, m.Spref)
buf = nchan.PutString(buf, m.Dpref)
binary.LittleEndian.PutUint64(n[0:], uint64(m.Depth))
buf = append(buf, n[:8]...)
}
return buf
}
/*
Pack the dir into a []byte that could be used later with ParseDir to
unpack the same dir.
*/
func (e Dir) Pack() []byte {
buf := make([]byte, 0, 100)
var hdr [4]byte
buf = append(buf, hdr[:]...)
for k, v := range e {
buf = nchan.PutString(buf, k)
buf = nchan.PutString(buf, v)
}
n := uint32(len(buf) - len(hdr))
binary.LittleEndian.PutUint32(buf[0:], n)
return buf
}