Get rid of exit() calls in algorithms and tests

modules/line_descriptor/include/opencv2/line_descriptor/descriptor.hpp

@@ -747,10 +747,7 @@ class CV_EXPORTS BinaryDescriptor : public Algorithm
 
       /* check parameters */
       if( n < 0 || k < 0 || k > n || p <= 0.0 || p >= 1.0 )
-      {
-        std::cout << "nfa: wrong n, k or p values." << std::endl;
-        exit( 0 );
-      }
+        CV_Error(Error::StsBadArg, "nfa: wrong n, k or p values.\n");
       /* trivial cases */
       if( n == 0 || k == 0 )
         return -logNT;

modules/plot/src/plot.cpp

@@ -62,17 +62,9 @@ namespace cv
                 Mat _plotData = plotData.getMat();
                 //if the matrix is not Nx1 or 1xN
                 if(_plotData.cols > 1 && _plotData.rows > 1)
-                {
-                    std::cout << "ERROR: Plot data must be a 1xN or Nx1 matrix." << std::endl;
-                    exit(0);
-                }
+                    CV_Error(Error::StsBadArg, "ERROR: Plot data must be a 1xN or Nx1 matrix.\n");
 
-                //if the matrix type is not CV_64F
-                if(_plotData.type() != CV_64F)
-                {
-                    std::cout << "ERROR: Plot data type must be double (CV_64F)." << std::endl;
-                    exit(0);
-                }
+                CV_Assert(_plotData.type() == CV_64F);
 
                 //in case we have a row matrix than needs to be transposed
                 if(_plotData.cols > _plotData.rows)
@@ -98,17 +90,9 @@ namespace cv
                 Mat _plotDataY = plotDataY_.getMat();
                 //f the matrix is not Nx1 or 1xN
                 if((_plotDataX.cols > 1 && _plotDataX.rows > 1) || (_plotDataY.cols > 1 && _plotDataY.rows > 1))
-                {
-                    std::cout << "ERROR: Plot data must be a 1xN or Nx1 matrix." << std::endl;
-                    exit(0);
-                }
+                    CV_Error(Error::StsBadArg, "ERROR: Plot data must be a 1xN or Nx1 matrix.\n");
 
-                //if the matrix type is not CV_64F
-                if(_plotDataX.type() != CV_64F || _plotDataY.type() != CV_64F)
-                {
-                    std::cout << "ERROR: Plot data type must be double (CV_64F)." << std::endl;
-                   exit(0);
-                }
+                CV_Assert(_plotDataX.type() == CV_64F && _plotDataY.type() == CV_64F);
 
                 //in case we have a row matrix than needs to be transposed
                 if(_plotDataX.cols > _plotDataX.rows)

modules/sfm/test/test_common.cpp

@@ -86,11 +86,8 @@ parser_2D_tracks(const string &_filename, std::vector<Mat> &points2d )
   ifstream myfile(_filename.c_str());
 
   if (!myfile.is_open())
-  {
-    cout << "Unable to read file: " << _filename << endl;
-    exit(0);
-
-  } else {
+      CV_Error(cv::Error::StsError, string("Unable to read file: ") + _filename + "\n");
+  else {
 
     double x, y;
     string line_str;

modules/surface_matching/src/ppf_helpers.cpp

@@ -114,12 +114,8 @@ void writePLY(Mat PC, const char* FileName)
 {
   std::ofstream outFile( FileName );
 
-  if ( !outFile )
-  {
-    //cerr << "Error opening output file: " << FileName << "!" << endl;
-    printf("Error opening output file: %s!\n", FileName);
-    exit( 1 );
-  }
+  if ( !outFile.is_open() )
+    CV_Error(Error::StsError, String("Error opening output file: ") + String(FileName) + "\n");
 
   ////
   // Header
@@ -167,12 +163,8 @@ void writePLYVisibleNormals(Mat PC, const char* FileName)
 {
   std::ofstream outFile(FileName);
 
-  if (!outFile)
-  {
-    //cerr << "Error opening output file: " << FileName << "!" << endl;
-    printf("Error opening output file: %s!\n", FileName);
-    exit(1);
-  }
+  if (!outFile.is_open())
+    CV_Error(Error::StsError, String("Error opening output file: ") + String(FileName) + "\n");
 
   ////
   // Header