Generate key-to-(start, stop) table of contents.
(self)
| 968 | f.write(linesep + b'\001\001\001\001' + linesep) |
| 969 | |
| 970 | def _generate_toc(self): |
| 971 | """Generate key-to-(start, stop) table of contents.""" |
| 972 | starts, stops = [], [] |
| 973 | self._file.seek(0) |
| 974 | next_pos = 0 |
| 975 | while True: |
| 976 | line_pos = next_pos |
| 977 | line = self._file.readline() |
| 978 | next_pos = self._file.tell() |
| 979 | if line.startswith(b'\001\001\001\001' + linesep): |
| 980 | starts.append(next_pos) |
| 981 | while True: |
| 982 | line_pos = next_pos |
| 983 | line = self._file.readline() |
| 984 | next_pos = self._file.tell() |
| 985 | if line == b'\001\001\001\001' + linesep: |
| 986 | stops.append(line_pos - len(linesep)) |
| 987 | break |
| 988 | elif not line: |
| 989 | stops.append(line_pos) |
| 990 | break |
| 991 | elif not line: |
| 992 | break |
| 993 | self._toc = dict(enumerate(zip(starts, stops))) |
| 994 | self._next_key = len(self._toc) |
| 995 | self._file.seek(0, 2) |
| 996 | self._file_length = self._file.tell() |
| 997 | |
| 998 | |
| 999 | class MH(Mailbox): |