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  • Committer: Canonical.com Patch Queue Manager
  • Date: 2006-03-09 06:39:13 UTC
  • mfrom: (1596.2.6 integration)
  • Revision ID: pqm@pqm.ubuntu.com-20060309063913-6d8ce700706d0802
Merge knit performance stage 1.

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bzrlib/graph.py
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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from bzrlib.tsort import topo_sort
 
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def max_distance(node, ancestors, distances, root_descendants):
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    """Calculate the max distance to an ancestor.  
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    Return None if not all possible ancestors have known distances"""
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        """Return a dictionary of graph node:ancestor_list entries."""
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        return dict(self._graph_ancestors.items())
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    def get_ancestry(self, node_id):
 
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        """Return the inclusive ancestors of node_id in topological order."""
 
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        # maybe optimise this ?
 
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        result = {}
 
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        pending = set([node_id])
 
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        while len(pending):
 
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            current = pending.pop()
 
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            parents = self._graph_ancestors[current]
 
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            parents = [parent for parent in parents if parent not in self.ghosts]
 
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            result[current] = parents
 
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            for parent in parents:
 
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                if parent not in result and parent not in pending:
 
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                    pending.add(parent)
 
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        return topo_sort(result.items())
 
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    def get_descendants(self):
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        """Return a dictionary of graph node:child_node:distance entries."""
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        return dict(self._graph_descendants.items())