()
| 344 | } |
| 345 | |
| 346 | func (idx *UserIndex) getMetaDataFromFile() IndexMetaData { |
| 347 | f, err := os.Open(idx.Filename) |
| 348 | if err != nil { |
| 349 | return IndexMetaData{} |
| 350 | } |
| 351 | defer f.Close() |
| 352 | |
| 353 | header := make([]byte, FixedHeaderTotalLength) |
| 354 | if _, err := io.ReadFull(f, header); err != nil { |
| 355 | return IndexMetaData{} |
| 356 | } |
| 357 | |
| 358 | var meta IndexMetaData |
| 359 | meta.MetaDataSize = uint64(len(header)) |
| 360 | headerContent := strings.TrimSpace(string(header[:FixedHeaderTotalLength-1])) |
| 361 | n, _ := fmt.Sscanf(headerContent, "VERSION=%d,RECORDCOUNT=%d,RECORDSIZE=%d,CHECKSUM=%d", &meta.IndexVersion, &meta.RecordCount, &meta.RecordSize, &meta.Checksum) |
| 362 | if n < 3 { |
| 363 | return IndexMetaData{} |
| 364 | } |
| 365 | |
| 366 | return meta |
| 367 | } |
| 368 | |
| 369 | // AddUser appends a new record to the index file and updates the header. |
| 370 | func (idx *UserIndex) AddUser(userId int, username string) error { |
no test coverage detected