Implement first DEC set/reset modes

terminaldispatcher.cpp

@@ -90,6 +90,7 @@ int Dispatcher::getparam( size_t N, int defaultval )
   int ret = defaultval;
   if ( !parsed ) {
     parse_params();
+    parsed = true;
   }
 
   if ( parsed_params.size() > N ) {
@@ -100,6 +101,16 @@ int Dispatcher::getparam( size_t N, int defaultval )
   return ret;
 }
 
+int Dispatcher::param_count( void )
+{
+  if ( !parsed ) {
+    parse_params();
+    parsed = true;
+  }
+
+  return parsed_params.size();
+}
+
 std::string Dispatcher::str( void )
 {
   char assum[ 64 ];