fix(xf2mat): raise error when wrong input

This adds a check to raise an error when the file is completely read and
it has not be determined to be a xfoil or xflr5 result file. This
prevent an infinite loop while trying to determine the result type.

+af_tools/xf2mat.m

@@ -122,6 +122,10 @@ function Polar = xf2mat(varargin)
                 progName = 'XFOIL';
             elseif ~isempty(tmpProgname) && strcmp(tmpProgname(1:5), 'xflr5')
                 progName = 'XFLR5';
+            elseif feof(fileID)
+                error('MATLAB:xf2mat:WrongInputFile', ...
+                      ['The input file does not seems to be a valid XFOIL or XFLR5 results file.'...
+                       ' Are you sure you loaded RESULTS files and not coordinate points?']);
             end
         end
 

CHANGELOG.md

@@ -22,6 +22,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
 
+- **xf2mat**: add error when input is not a proper xfoil/xflr5 result
+
 - **plotpolar**: fix issue when unavailable data
 
 ## [4.0.0] - 2022-06-09