Clear the critical flag one track earlier

[r2c2.git] / source / libr2c2 / blockiter.cpp

diff --git a/source/libr2c2/blockiter.cpp b/source/libr2c2/blockiter.cpp
index 038600bbffa933a25c6e5022790b04437b4000dc..9dcca6c68672a9392883ff4ccb4803358588a7f1 100644 (file)
--- a/source/libr2c2/blockiter.cpp
+++ b/source/libr2c2/blockiter.cpp
@@ -40,24 +40,18 @@ const Block::Endpoint &BlockIter::endpoint() const
 int BlockIter::get_exit(const Route *route) const
 {
        const vector<Block::Endpoint> &eps = _block->get_endpoints();
-       TrackIter t_iter = track_iter();
-
-       while(t_iter)
+       if(_block->get_turnout_address())
        {
-               if(!_block->has_track(*t_iter))
-                       throw logic_error("internal error (block traversal escaped the block)");
-
+               /* The endpoints of a turnout block exactly correspond to the endpoints
+               of the track. */
+               TrackIter t_iter = track_iter();
                unsigned path = (route ? route->get_path(*t_iter) : t_iter->get_active_path());
-               TrackIter t_exit = t_iter.reverse(path);
-
-               for(unsigned i=0; i<eps.size(); ++i)
-                       if(eps[i].track==t_exit.track() && eps[i].track_ep==t_exit.entry())
-                               return i;
-
-               t_iter = t_exit.flip();
+               return t_iter.reverse(path).entry();
        }
-
-       return -1;
+       else if(eps.size()==2)
+               return 1-_entry;
+       else
+               return -1;
 }
 
 BlockIter BlockIter::next(const Route *route) const