Throw exceptions if file not found

git-svn-id: svn+ssh://scm.gforge.inria.fr/svnroot/gudhi/branches/read_persistence_from_file@2533 636b058d-ea47-450e-bf9e-a15bfbe3eedb

Former-commit-id: b412f432aeac6aef07ac2d9d65d50dc8f508c2e6

1 files changed, 8 insertions, 5 deletions

diff --git a/src/common/include/gudhi/reader_utils.h b/src/common/include/gudhi/reader_utils.h
index 62b479ac..35af09bd 100644
--- a/src/common/include/gudhi/reader_utils.h
+++ b/src/common/include/gudhi/reader_utils.h
@@ -94,7 +94,10 @@ template< typename Graph_t, typename Filtration_value, typename Vertex_handle >
 Graph_t read_graph(std::string file_name) {
   std::ifstream in_(file_name.c_str(), std::ios::in);
   if (!in_.is_open()) {
-    std::cerr << "Unable to open file " << file_name << std::endl;
+    std::string error_str("read_graph - Unable to open file ");
+    error_str.append(file_name);
+    std::cerr << error_str << std::endl;
+    throw std::invalid_argument(error_str);
   }
 
   typedef std::pair< Vertex_handle, Vertex_handle > Edge_t;
@@ -308,10 +311,10 @@ void read_persistence_intervals_and_dimension(std::string const& filename, Outpu
 
   std::ifstream in(filename);
   if (!in.is_open()) {
-#ifdef DEBUG_TRACES
-    std::cerr << "File \"" << filename << "\" does not exist.\n";
-#endif  // DEBUG_TRACES
-    return;
+    std::string error_str("read_persistence_intervals_and_dimension - Unable to open file ");
+    error_str.append(filename);
+    std::cerr << error_str << std::endl;
+    throw std::invalid_argument(error_str);
   }
 
   while (!in.eof()) {