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| Path | Packages | |||
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| M | mercurial/revlogutils/docket.py (7 lines) |
| Commit | Parents | Author | Summary | Date |
|---|---|---|---|---|
| 41b5e46a90ba | cac366c0a398 | Gregory Szorc | Feb 21 2022, 12:48 PM |
| def make_uid(id_size=8): | def make_uid(id_size=8): | ||||
| try: | try: | ||||
| with open(stable_docket_file, mode='rb') as f: | with open(stable_docket_file, mode='rb') as f: | ||||
| seed = f.read().strip() | seed = f.read().strip() | ||||
| except IOError as inst: | except IOError as inst: | ||||
| if inst.errno != errno.ENOENT: | if inst.errno != errno.ENOENT: | ||||
| raise | raise | ||||
| seed = b'04' # chosen by a fair dice roll. garanteed to be random | seed = b'04' # chosen by a fair dice roll. garanteed to be random | ||||
| if pycompat.ispy3: | |||||
| iter_seed = iter(seed) | iter_seed = iter(seed) | ||||
| else: | |||||
| # pytype: disable=wrong-arg-types | |||||
| iter_seed = (ord(c) for c in seed) | |||||
| # pytype: enable=wrong-arg-types | |||||
| # some basic circular sum hashing on 64 bits | # some basic circular sum hashing on 64 bits | ||||
| int_seed = 0 | int_seed = 0 | ||||
| low_mask = int('1' * 35, 2) | low_mask = int('1' * 35, 2) | ||||
| for i in iter_seed: | for i in iter_seed: | ||||
| high_part = int_seed >> 35 | high_part = int_seed >> 35 | ||||
| low_part = (int_seed & low_mask) << 28 | low_part = (int_seed & low_mask) << 28 | ||||
| int_seed = high_part + low_part + i | int_seed = high_part + low_part + i | ||||
| r = random.Random() | r = random.Random() | ||||