X-Git-Url: https://fleuret.org/cgi-bin/gitweb/gitweb.cgi?p=mtp.git;a=blobdiff_plain;f=mtp_graph.cc;h=983e3a0798088144e34f9fb2fcfa499dd649f7f3;hp=5b42781f0b0ae8885f12fb20ddbe48c4d89f1d37;hb=0a6d07532af68442ca86e3e23740204443b965e0;hpb=5c9f12580ae4e515ef48d0891c7d85a3d7eb2b04

diff --git a/mtp_graph.cc b/mtp_graph.cc
index 5b42781..983e3a0 100644
--- a/mtp_graph.cc
+++ b/mtp_graph.cc
@@ -284,20 +284,20 @@ void MTPGraph::find_shortest_path() {
     _vertices[k].pred_edge_toward_source = 0;
   }
 
-  _heap_size = _nb_vertices;
+  int heap_size = _nb_vertices;
   _source->distance_from_source = 0;
   _source->decrease_distance_in_heap(_heap);
 
-  do {
+   while(heap_size > 0) {
     // Get the closest to the source
     v = _heap[0];
 
     // Remove it from the heap (swap it with the last_slot in the heap, and
     // update the distance of that one)
-    _heap_size--;
-    last_slot = _heap + _heap_size;
+    heap_size--;
+    last_slot = _heap + heap_size;
     swap(*_heap, *last_slot); swap((*_heap)->heap_slot, (*last_slot)->heap_slot);
-    _heap[0]->increase_distance_in_heap(_heap, _heap + _heap_size);
+    _heap[0]->increase_distance_in_heap(_heap, last_slot);
 
     // Now update the neighbors of the node currently closest to the
     // source
@@ -305,13 +305,13 @@ void MTPGraph::find_shortest_path() {
       d = v->distance_from_source + e->positivized_length;
       tv = e->terminal_vertex;
       if(d < tv->distance_from_source) {
-        ASSERT(tv->heap_slot - _heap < _heap_size);
+        ASSERT(tv->heap_slot < last_slot);
         tv->distance_from_source = d;
         tv->pred_edge_toward_source = e;
         tv->decrease_distance_in_heap(_heap);
       }
     }
-  } while(_heap_size > 0);
+  }
 }
 
 void MTPGraph::find_best_paths(scalar_t *lengths) {