Generate key-to-(start, stop) table of contents.
(self)
| 961 | f.write(linesep + b'\001\001\001\001' + linesep) |
| 962 | |
| 963 | def _generate_toc(self): |
| 964 | """Generate key-to-(start, stop) table of contents.""" |
| 965 | starts, stops = [], [] |
| 966 | self._file.seek(0) |
| 967 | next_pos = 0 |
| 968 | while True: |
| 969 | line_pos = next_pos |
| 970 | line = self._file.readline() |
| 971 | next_pos = self._file.tell() |
| 972 | if line.startswith(b'\001\001\001\001' + linesep): |
| 973 | starts.append(next_pos) |
| 974 | while True: |
| 975 | line_pos = next_pos |
| 976 | line = self._file.readline() |
| 977 | next_pos = self._file.tell() |
| 978 | if line == b'\001\001\001\001' + linesep: |
| 979 | stops.append(line_pos - len(linesep)) |
| 980 | break |
| 981 | elif not line: |
| 982 | stops.append(line_pos) |
| 983 | break |
| 984 | elif not line: |
| 985 | break |
| 986 | self._toc = dict(enumerate(zip(starts, stops))) |
| 987 | self._next_key = len(self._toc) |
| 988 | self._file.seek(0, 2) |
| 989 | self._file_length = self._file.tell() |
| 990 | |
| 991 | |
| 992 | class MH(Mailbox): |