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comparison cutils/treesum.py @ 322:0cabc5439505

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treesum: Remove CRC32Output completely
author Franz Glasner <fzglas.hg@dom66.de>
date Wed, 26 Mar 2025 13:00:40 +0100
parents 49ecfff4f319
children 48430941c18c
comparison
equal deleted inserted replaced
321:49ecfff4f319 322:0cabc5439505
1241 return u"/".join(top) + u"/" + name 1241 return u"/".join(top) + u"/" + name
1242 else: 1242 else:
1243 return name 1243 return name
1244 1244
1245 1245
1246 class CRC32Output(object):
1247
1248 """Wrapper for a minimal binary file contextmanager that calculates
1249 the CRC32 of the written bytes on the fly.
1250
1251 Also acts as context manager proxy for the given context manager.
1252
1253 """
1254
1255 __slots__ = ("_fp_cm", "_fp", "_crc32")
1256
1257 def __init__(self, fp_cm):
1258 self._fp_cm = fp_cm
1259 self._fp = None
1260 self.resetdigest()
1261
1262 def __enter__(self):
1263 assert self._fp is None
1264 self._fp = self._fp_cm.__enter__()
1265 return self
1266
1267 def __exit__(self, *args):
1268 rv = self._fp_cm.__exit__(*args)
1269 self._fp = None
1270 return rv
1271
1272 def write(self, what):
1273 self._fp.write(what)
1274 self._crc32.update(what)
1275
1276 def flush(self):
1277 self._fp.flush()
1278
1279 def resetdigest(self):
1280 """Reset the current CRC digest"""
1281 self._crc32 = crc32()
1282
1283 def hexcrcdigest(self):
1284 """
1285
1286 :rtype: str
1287
1288 """
1289 return self._crc32.hexdigest()
1290
1291
1292 def normalized_compatible_mode_str(mode): 1246 def normalized_compatible_mode_str(mode):
1293 # XXX FIXME: Windows and "executable" 1247 # XXX FIXME: Windows and "executable"
1294 modebits = stat.S_IMODE(mode) 1248 modebits = stat.S_IMODE(mode)
1295 modestr = "%o" % (modebits,) 1249 modestr = "%o" % (modebits,)
1296 if not modestr.startswith("0"): 1250 if not modestr.startswith("0"):