| Name | Lines of code | Maintainability | Test coverage |
| lib/zip.rb | 70 | A 0 mins | |
| lib/zip/filesystem/dir.rb | 70 | A 0 mins | |
| lib/zip/extra_field/ntfs.rb | 70 | A 1 hr | |
| lib/zip/extra_field.rb | 72 | A 1 hr | |
| samples/qtzip.rb | 75 | A 45 mins | |
| lib/zip/file_split.rb | 76 | A 2 hrs | |
| lib/zip/crypto/traditional_encryption.rb | 77 | A 0 mins | |
| lib/zip/errors.rb | 83 | A 0 mins | |
| lib/zip/filesystem/file_stat.rb | 91 | A 0 mins | |
| lib/zip/ioextras/abstract_input_stream.rb | 99 | B 5 hrs | |
| lib/zip/constants.rb | 99 | A 0 mins | |
| lib/zip/input_stream.rb | 104 | A 0 mins | |
| lib/zip/output_stream.rb | 144 | A 1 hr | |
| lib/zip/filesystem/file.rb | 198 | B 6 hrs | |
| lib/zip/central_directory.rb | 204 | B 4 hrs | |
| lib/zip/file.rb | 252 | C 1 day | |
| lib/zip/entry.rb | 635 | F 4 days |