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//usr/lib/python2.4/lib-old/cmpcache.pyo
mò ‚=5Dc @ sG d Z d k Z d k Td k Z h Z d d „ Z d „ Z d „ Z d S( s Efficiently compare files, boolean outcome only (equal / not equal). Tricks (used in this order): - Use the statcache module to avoid statting files more than once - Files with identical type, size & mtime are assumed to be clones - Files with different type or size cannot be identical - We keep a cache of outcomes of earlier comparisons - We don't fork a process to run 'cmp' but read the files ourselves N( t *i c C s t t i | ƒ ƒ t t i | ƒ ƒ } } t | d ƒ p t | d ƒ o d Sn | o | | j o d Sn | d | d j o d Sn | d | } t i | ƒ o9 t | \ } } } | | j o | | j o | Sqç n t | | ƒ } | | | f t | <| S( sß Compare two files, use the cache if possible. May raise os.error if a stat or open of either fails. Return 1 for identical files, 0 for different. Raise exceptions if either file could not be statted, read, etc.i i i t N( t sigt statcachet statt f1t f2t s1t s2t S_ISREGt shallowt keyt cachet has_keyt cs1t cs2t outcomet do_cmp( R R R R R R R R R ( ( t&