Minor code cleanup

tools/imglab/src/main.cpp

@@ -9,6 +9,7 @@
 #include <dlib/dir_nav.h>
 
 
+typedef dlib::cmd_line_parser<char>::check_1a_c parser_type;
 
 using namespace std;
 using namespace dlib;
@@ -46,35 +47,10 @@ void make_empty_file (
 
 // ----------------------------------------------------------------------------------------
 
-
-int main(int argc, char** argv)
+void create_new_dataset (
+    const parser_type& parser
+)
 {
-    try
-    {
-        typedef dlib::cmd_line_parser<char>::check_1a_c parser_type;
-
-        parser_type parser;
-
-        parser.add_option("h","Displays this information.");
-        parser.add_option("c","Create an XML file named <arg> listing a set of images.",1);
-        parser.add_option("r","Search directories recursively for images.");
-
-        parser.parse(argc, argv);
-
-        const char* singles[] = {"h","c","r"};
-        parser.check_one_time_options(singles);
-        parser.check_sub_option("c", "r");
-
-        if (parser.option("h"))
-        {
-            cout << "Usage: imglab [options] <image files/directories or XML file list>\n";
-            parser.print_options(cout);
-            cout << endl << endl;
-            return EXIT_SUCCESS;
-        }
-
-        if (parser.option("c"))
-        {
     using namespace dlib::image_dataset_metadata;
 
     const std::string filename = parser.option("c").argument();
@@ -114,7 +90,38 @@ int main(int argc, char** argv)
     }
 
     save_image_dataset_metadata(meta, filename);
+}
+
+// ----------------------------------------------------------------------------------------
+
+int main(int argc, char** argv)
+{
+    try
+    {
+
+        parser_type parser;
+
+        parser.add_option("h","Displays this information.");
+        parser.add_option("c","Create an XML file named <arg> listing a set of images.",1);
+        parser.add_option("r","Search directories recursively for images.");
+
+        parser.parse(argc, argv);
+
+        const char* singles[] = {"h","c","r"};
+        parser.check_one_time_options(singles);
+        parser.check_sub_option("c", "r");
 
+        if (parser.option("h"))
+        {
+            cout << "Usage: imglab [options] <image files/directories or XML file list>\n";
+            parser.print_options(cout);
+            cout << endl << endl;
+            return EXIT_SUCCESS;
+        }
+
+        if (parser.option("c"))
+        {
+            create_new_dataset(parser);
             return EXIT_SUCCESS;
         }
 
@@ -132,3 +139,5 @@ int main(int argc, char** argv)
     }
 }
 
+// ----------------------------------------------------------------------------------------
+