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54 lines
1.6 KiB
54 lines
1.6 KiB
11 years ago
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import cPickle as pickle
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class HashCache(object):
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def __init__(self):
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self.inodes = dict()
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def add(self, dev, inode, mtime, size, md5):
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if dev not in self.inodes:
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self.inodes[dev] = dict()
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if inode not in self.inodes[dev]:
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self.inodes[dev][inode] = dict()
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self.inodes[dev][inode][mtime] = dict(md5=md5, size=size)
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def md5(self, dev, inode, mtime, size):
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try:
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d = self.inodes[dev][inode][mtime]
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if d['size'] != size:
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return None
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except:
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return None
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return d['md5']
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def mark_all_for_purge(self):
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for d in self.inodes.keys():
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for i in self.inodes[d].keys():
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for c in self.inodes[d][i].keys():
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self.inodes[d][i][c]['purge'] = True
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def unmark_for_purge(self, dev, inode, mtime, size):
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d = self.inodes[dev][inode][mtime]
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if d['size'] == size and 'purge' in d:
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del self.inodes[dev][inode][mtime]['purge']
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def purge(self):
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for d in self.inodes.keys():
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for i in self.inodes[d].keys():
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for m in self.inodes[d][i].keys():
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if 'purge' in self.inodes[d][i][m]:
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del self.inodes[d][i]
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break
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def save(self, f):
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d = dict(inodes=self.inodes, version=1)
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f = open(f, 'w')
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p = pickle.dump(d, f)
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f.close()
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def load(self, f):
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f = open(f, 'r')
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d = pickle.load(f)
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f.close()
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if d.get('version') == 1 and 'inodes' in d:
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self.inodes = d['inodes']
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