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comparison cutils/treesum.py @ 307:64df94bf4659

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treesum: Build a little static database of digest sizes. So older Python versions can read and use treesum files produced by newer Python versions and digest algorithms.
author Franz Glasner <fzglas.hg@dom66.de>
date Fri, 07 Mar 2025 14:22:22 +0100
parents ebddfdbc3f7a
children 652870b20f9e
comparison
equal deleted inserted replaced
306:ebddfdbc3f7a 307:64df94bf4659
1508 1508
1509 def _hex_crc(self): 1509 def _hex_crc(self):
1510 return self._crc32.hexdigest() 1510 return self._crc32.hexdigest()
1511 1511
1512 def _get_digest_size(self, algo_name): 1512 def _get_digest_size(self, algo_name):
1513 """Get the `digest_size` from algorithm specifier `algo_name`.
1514
1515 Cache this on the assumption, that algorithms do not change very
1516 often. Do this because the `digest_size` can only be given by a
1517 digest instance.
1518
1519 """
1513 if self._current_algo_name == algo_name: 1520 if self._current_algo_name == algo_name:
1514 return self._current_algo_digest_size 1521 return self._current_algo_digest_size
1515 h = util.algotag2algotype(algo_name)() 1522 sz = util.algotag2digest_size(algo_name)
1516 self._current_algo_name = algo_name 1523 self._current_algo_name = algo_name
1517 self._current_algo_digest_size = h.digest_size 1524 self._current_algo_digest_size = sz
1518 return self._current_algo_digest_size 1525 return self._current_algo_digest_size
1519 1526
1520 1527
1521 def print_treesum_digestfile_infos(opts): 1528 def print_treesum_digestfile_infos(opts):
1522 get_infos_from_digestfile( 1529 get_infos_from_digestfile(