add code to benchmark to test specific situations

Convex_hull_2/benchmark/Convex_hull_2/static_ch2.cpp

@@ -14,6 +14,7 @@
 
 #define bench(METHOD,CONTAINER) \
 {\
+  std::size_t previous=0;\
   unsigned run=0;\
   CGAL::Timer time;\
   do{\
@@ -21,6 +22,8 @@
     time.start();\
     METHOD( CONTAINER.begin(), CONTAINER.end(), std::back_inserter(result) );\
     time.stop();\
+    if( previous!=0 && previous!=result.size()) std::cerr << "error got different result" << std::endl;\
+    previous=result.size();\
   }while(++run<repeat+1);\
   std::cout << result.size() << " points on the convex hull using "<< #METHOD << "; Done in "<< time.time() << "s\n";\
 }
@@ -37,6 +40,7 @@ int main(int argc, char** argv)
   unsigned seed=0;
   
   if (argc>1)  nbpts=atoi(argv[1]);
+
   if (argc>2)  repeat=atoi(argv[2]);
   if (argc>3)  seed=atoi(argv[3]);
   
@@ -46,6 +50,38 @@ int main(int argc, char** argv)
   CGAL::Random_points_in_disc_2<Point_2,Creator> g( 150.0,r);
   CGAL::cpp0x::copy_n( g, nbpts, std::back_inserter(points));
   
+  //the following code is for testing when there is only two extreme points, affine hull is 2D
+  /*
+  CGAL::Bbox_2 bbox=points.begin()->bbox();
+  for (Points::iterator it=points.begin();it!=points.end();++it)
+    bbox=bbox+it->bbox();
+  
+  points.push_back( Point_2(bbox.xmin()-1,bbox.ymin()-1) );
+  points.push_back( Point_2(bbox.xmax()+1,bbox.ymax()+1) );
+  */
+
+  //the following code is for testing when there is only three extreme points
+  /*
+  CGAL::Bbox_2 bbox=points.begin()->bbox();
+  for (Points::iterator it=points.begin();it!=points.end();++it)
+    bbox=bbox+it->bbox();
+  
+  points.push_back( Point_2(bbox.xmin()-1,bbox.ymin()-1) );
+  points.push_back( Point_2(bbox.xmax()+1,bbox.ymax()+1) );
+  points.push_back( Point_2(bbox.xmax(),bbox.ymax()+2) );
+  */ 
+  
+  //the following code is for testing when there is only two extreme points, affine hull is 1D
+  /*
+  points.clear();
+  for (unsigned i=0;i<nbpts;++i)
+    points.push_back(Point_2(i,i));
+  */
+
+  
+  
+  
+  
   std::cout << "seed is " << seed << "; using " << nbpts << " pts; on " << repeat+1 <<  " run(s).\n";   
   
   std::cout << "Using vector" << std::endl;