func EncodingEntry(e pb.Entry) ([]byte, error) {
data, err := e.Marshal()
if err != nil {
return nil, err
}
size := len(data)
ret := make([]byte, 4)
binary.BigEndian.PutUint32(ret, uint32(size))
ret = append(ret, data...)
return ret, nil
}
func (fs *FragmentStorage) Entry(i uint64) (pb.Entry, error) {
fs.fents.Seek(int64(i*SegmentSize), 0)
lengthByte := make([]byte, 4)
entry := pb.Entry{}
n, err := fs.fents.Read(lengthByte)
if err != nil || n != 4 {
if err != nil {
return entry, err
}
return entry, ErrEntryLength
}
len := binary.BigEndian.Uint32(lengthByte)
payload := make([]byte, int(len))
n, err = fs.fents.Read(payload)
if err != nil || n != int(len) {
if err != nil {
return entry, err
}
return entry, ErrEntryContentShort
}
return entry, entry.Unmarshal(payload)
}