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Viewing changes to bzrlib/groupcompress.py

  • Committer: John Arbash Meinel
  • Date: 2010-08-27 17:53:08 UTC
  • mfrom: (5390 +trunk)
  • mto: This revision was merged to the branch mainline in revision 5393.
  • Revision ID: john@arbash-meinel.com-20100827175308-qsvcc11dkfvkrny1
Merge bzr.dev 5390

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bzrlib/groupcompress.py
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        return result
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class _GCBuildDetails(object):
 
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    """A blob of data about the build details.
 
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    This stores the minimal data, which then allows compatibility with the old
 
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    api, without taking as much memory.
 
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    """
 
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    __slots__ = ('_index', '_group_start', '_group_end', '_basis_end',
 
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                 '_delta_end', '_parents')
 
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    method = 'group'
 
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    compression_parent = None
 
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    def __init__(self, parents, position_info):
 
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        self._parents = parents
 
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        (self._index, self._group_start, self._group_end, self._basis_end,
 
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         self._delta_end) = position_info
 
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    def __repr__(self):
 
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        return '%s(%s, %s)' % (self.__class__.__name__,
 
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            self.index_memo, self._parents)
 
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    @property
 
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    def index_memo(self):
 
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        return (self._index, self._group_start, self._group_end,
 
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                self._basis_end, self._delta_end)
 
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    @property
 
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    def record_details(self):
 
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        return static_tuple.StaticTuple(self.method, None)
 
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    def __getitem__(self, offset):
 
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        """Compatibility thunk to act like a tuple."""
 
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        if offset == 0:
 
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            return self.index_memo
 
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        elif offset == 1:
 
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            return self.compression_parent # Always None
 
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        elif offset == 2:
 
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            return self._parents
 
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        elif offset == 3:
 
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            return self.record_details
 
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        else:
 
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            raise IndexError('offset out of range')
 
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    def __len__(self):
 
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        return 4
 
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class _GCGraphIndex(object):
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    """Mapper from GroupCompressVersionedFiles needs into GraphIndex storage."""
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                parents = None
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            else:
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                parents = entry[3][0]
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            method = 'group'
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            result[key] = (self._node_to_position(entry),
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                                  None, parents, (method, None))
 
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            details = _GCBuildDetails(parents, self._node_to_position(entry))
 
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            result[key] = details
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        return result
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    def keys(self):
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        # each, or about 7MB. Note that it might be even more when you consider
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        # how PyInt is allocated in separate slabs. And you can't return a slab
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        # to the OS if even 1 int on it is in use. Note though that Python uses
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        # a LIFO when re-using PyInt slots, which probably causes more
 
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        # a LIFO when re-using PyInt slots, which might cause more
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        # fragmentation.
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        start = int(bits[0])
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        start = self._int_cache.setdefault(start, start)