Catch exception when Faust.save() fails in dynamic library to avoid python/matlab script to crash.

Just displaying the error message.

wrapper/matlab/src/mexFaust.cpp.in

@@ -92,7 +92,14 @@ void save(Faust::TransformHelper<SCALAR,Cpu>* core_ptr, int nargs, const mxArray
             return;
         }
         //	printf("save: filepath = %s, nargs = %d\n", filepath, nargs);
-        core_ptr->save_mat_file(filepath/*, mxGetScalar(args[1])*/);
+		try
+		{
+			core_ptr->save_mat_file(filepath/*, mxGetScalar(args[1])*/);
+		}
+		catch(exception& e)
+		{
+			mexErrMsgTxt("Failed to save the file.");
+		}
     }
 
     void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[])

wrapper/python/src/FaustCoreCpp.h

@@ -91,7 +91,7 @@ class FaustCoreCpp
     FaustCoreCpp<FPP>* fancy_idx(unsigned long int* row_ids, unsigned long int
                                   num_rows, unsigned long int* col_ids,
                                   unsigned long int num_cols);
-    void save_mat_file(const char* filepath) const;
+    bool save_mat_file(const char* filepath) const;
     const bool isTransposed();
     FaustCoreCpp<FPP>* transpose();
     FaustCoreCpp<FPP>* conjugate();

wrapper/python/src/FaustCoreCpp.hpp

@@ -294,10 +294,18 @@ FaustCoreCpp<FPP>* FaustCoreCpp<FPP>::fancy_idx(unsigned long int* row_ids, unsi
 }
 
 template<typename FPP>
-void FaustCoreCpp<FPP>::save_mat_file(const char* filepath) const
+bool FaustCoreCpp<FPP>::save_mat_file(const char* filepath) const
 {
     //    std::cout << "FaustCoreCpp::save_mat_file()" << std::endl;
-    this->transform->save_mat_file(filepath);
+    try
+    {
+        this->transform->save_mat_file(filepath);
+        return true;
+    }
+    catch(exception& e) {
+        //cerr << e.what() << endl;
+        return false;
+    }
 }
 
 template<typename FPP>

wrapper/python/src/FaustCoreCy.pxd

@@ -81,7 +81,7 @@ cdef extern from "FaustCoreCpp.h" :
         FaustCoreCpp[FPP]* fancy_idx(unsigned long int* row_ids, unsigned long int
                                   num_rows, unsigned long int* col_ids,
                                   unsigned long int num_cols)
-        void save_mat_file(const char* filepath) const
+        bool save_mat_file(const char* filepath) const
         const bool isTransposed()
         FaustCoreCpp[FPP]* transpose()
         FaustCoreCpp[FPP]* conjugate()

wrapper/python/src/FaustCorePy.pyx

@@ -653,9 +653,11 @@ cdef class FaustCore:
             cfilepath[i] = fparr[i]
         cfilepath[i+1] = 0
         if(self._isReal):
-            self.core_faust_dbl.save_mat_file(cfilepath)
+            ret = self.core_faust_dbl.save_mat_file(cfilepath)
         else:
-            self.core_faust_cplx.save_mat_file(cfilepath)
+            ret = self.core_faust_cplx.save_mat_file(cfilepath)
+        if(not ret):
+            raise Exception("Failed to save the file: "+filepath)
         PyMem_Free(cfilepath)
 
     def transpose(self):