func (e *segmentEntry) read(reader typedio.Reader) (err os.Error) {
e.position, err = reader.ReadUint64() // position
if err != nil {
return err
}
tokenInt, err := reader.ReadUint16() // token
if err != nil {
return err
}
e.token = Token(tokenInt)
e.mutsize, err = reader.ReadUint32() // size of mutation
if err != nil {
return err
}
e.mutation, err = mutationUnserialize(reader) // mutation
if err != nil {
return err
}
e.mutation.segEntry = e
e.mutation.token = e.token
e.mutation.seg = e.segment
return
}
func mutationUnserialize(reader typedio.Reader) (mut *mutation, err os.Error) {
mut = &mutation{}
mut.typ, err = reader.ReadUint16() // type
if err != nil {
return mut, err
}
switch mut.typ {
case mut_create_vs:
case mut_commit_vs:
case mut_rollback_vs:
mut.vs, err = reader.ReadUint32() // viewstate
if err != nil {
return mut, err
}
case mut_obj_op:
opid, err := reader.ReadUint16() // operation id
if err != nil {
return mut, err
}
mut.op = id2operation(opid).(mutationOperation)
var bytes []byte
var bytecount uint32
bytecount, err = reader.ReadUint32() // operation size
if err != nil {
return mut, err
}
bytes = make([]byte, int(bytecount))
_, err = reader.Read(bytes) // operation
if err != nil {
return mut, err
}
err = proto.Unmarshal(bytes, mut.op)
if err != nil {
return mut, err
}
bytes = make([]byte, 1)
_, err = reader.Read(bytes) // flags
if err != nil {
return mut, err
}
mut.flags = bytes[0]
mut.lastPos, err = reader.ReadUint64() // object last position
if err != nil {
return mut, err
}
default:
return nil, os.NewError(fmt.Sprintf("Unknown mutation type to unserialize: %d", mut.typ))
}
return mut, err
}