Generate key-to-(start, stop) table of contents.
(self)
| 905 | f.write(linesep + b'\001\001\001\001' + linesep) |
| 906 | |
| 907 | def _generate_toc(self): |
| 908 | """Generate key-to-(start, stop) table of contents.""" |
| 909 | starts, stops = [], [] |
| 910 | self._file.seek(0) |
| 911 | next_pos = 0 |
| 912 | while True: |
| 913 | line_pos = next_pos |
| 914 | line = self._file.readline() |
| 915 | next_pos = self._file.tell() |
| 916 | if line.startswith(b'\001\001\001\001' + linesep): |
| 917 | starts.append(next_pos) |
| 918 | while True: |
| 919 | line_pos = next_pos |
| 920 | line = self._file.readline() |
| 921 | next_pos = self._file.tell() |
| 922 | if line == b'\001\001\001\001' + linesep: |
| 923 | stops.append(line_pos - len(linesep)) |
| 924 | break |
| 925 | elif not line: |
| 926 | stops.append(line_pos) |
| 927 | break |
| 928 | elif not line: |
| 929 | break |
| 930 | self._toc = dict(enumerate(zip(starts, stops))) |
| 931 | self._next_key = len(self._toc) |
| 932 | self._file.seek(0, 2) |
| 933 | self._file_length = self._file.tell() |
| 934 | |
| 935 | |
| 936 | class MH(Mailbox): |