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Viewing changes to bzrlib/chk_map.py

  • Committer: Martin Pool
  • Date: 2010-04-01 04:41:18 UTC
  • mto: This revision was merged to the branch mainline in revision 5128.
  • Revision ID: mbp@sourcefrog.net-20100401044118-shyctqc02ob08ngz
ignore .testrepository

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bzrlib/chk_map.py
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_INTERESTING_NEW_SIZE = 50
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# If a ChildNode shrinks by more than this amount, we check for a remap
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_INTERESTING_SHRINKAGE_LIMIT = 20
 
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# If we delete more than this many nodes applying a delta, we check for a remap
 
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_INTERESTING_DELETES_LIMIT = 5
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def _search_key_plain(key):
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            into the map; if old_key is not None, then the old mapping
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            of old_key is removed.
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        """
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        has_deletes = False
 
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        delete_count = 0
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        # Check preconditions first.
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        as_st = StaticTuple.from_sequence
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        new_items = set([as_st(key) for (old, key, value) in delta
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        for old, new, value in delta:
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            if old is not None and old != new:
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                self.unmap(old, check_remap=False)
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                has_deletes = True
 
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                delete_count += 1
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        for old, new, value in delta:
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            if new is not None:
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                self.map(new, value)
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        if has_deletes:
 
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        if delete_count > _INTERESTING_DELETES_LIMIT:
 
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            trace.mutter("checking remap as %d deletions", delete_count)
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            self._check_remap()
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        return self._save()
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        """Check if nodes can be collapsed."""
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        self._ensure_root()
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        if type(self._root_node) is InternalNode:
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            self._root_node = self._root_node._check_remap(self._store)
 
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            self._root_node._check_remap(self._store)
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    def _save(self):
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        """Save the map completely.
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        the key/value pairs.
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    """
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    __slots__ = ('_common_serialised_prefix',)
 
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    __slots__ = ('_common_serialised_prefix', '_serialise_key')
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    def __init__(self, search_key_func=None):
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        Node.__init__(self)
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        # All of the keys in this leaf node share this common prefix
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        self._common_serialised_prefix = None
 
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        self._serialise_key = '\x00'.join
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        if search_key_func is None:
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            self._search_key_func = _search_key_plain
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        else:
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                raise AssertionError('%r must be known' % self._search_prefix)
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            return self._search_prefix, [("", self)]
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    _serialise_key = '\x00'.join
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    def serialise(self, store):
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        """Serialise the LeafNode to store.
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try:
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    from bzrlib._chk_map_pyx import (
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        _bytes_to_text_key,
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        _search_key_16,
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        _search_key_255,
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        _deserialise_leaf_node,
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except ImportError, e:
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    osutils.failed_to_load_extension(e)
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    from bzrlib._chk_map_py import (
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        _bytes_to_text_key,
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        _search_key_16,
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        _search_key_255,
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        _deserialise_leaf_node,