clang-tidy modernize-use-nullptr

src/examples/attitude_estimator_ekf/attitude_estimator_ekf_main.cpp

@@ -177,7 +177,7 @@ int attitude_estimator_ekf_main(int argc, char *argv[])
 					      SCHED_PRIORITY_MAX - 5,
 					      7000,
 					      attitude_estimator_ekf_thread_main,
-					      (argv) ? (char * const *)&argv[2] : (char * const *)NULL);
+					      (argv) ? (char * const *)&argv[2] : (char * const *)nullptr);
 		return 0;
 	}
 

src/examples/ekf_att_pos_estimator/ekf_att_pos_estimator_main.cpp

@@ -121,7 +121,7 @@ AttitudePositionEstimatorEKF	*g_estimator = nullptr;
 }
 
 AttitudePositionEstimatorEKF::AttitudePositionEstimatorEKF() :
-	SuperBlock(NULL, "PE"),
+	SuperBlock(nullptr, "PE"),
 	_task_should_exit(false),
 	_task_running(false),
 	_estimator_task(-1),
@@ -396,7 +396,7 @@ int AttitudePositionEstimatorEKF::check_filter_state()
 
 	int check = _ekf->CheckAndBound(&ekf_report);
 
-	const char *const feedback[] = { 0,
+	const char *const feedback[] = { nullptr,
 					 "NaN in states, resetting",
 					 "stale sensor data, resetting",
 					 "got initial position lock",
@@ -1721,7 +1721,7 @@ int ekf_att_pos_estimator_main(int argc, char *argv[])
 	}
 
 	if (!strcmp(argv[1], "debug")) {
-		int debug = strtoul(argv[2], NULL, 10);
+		int debug = strtoul(argv[2], nullptr, 10);
 		int ret = estimator::g_estimator->set_debuglevel(debug);
 
 		return ret;

src/examples/fixedwing_control/main.cpp

@@ -462,7 +462,7 @@ int ex_fixedwing_control_main(int argc, char *argv[])
 						 SCHED_PRIORITY_MAX - 20,
 						 2048,
 						 fixedwing_control_thread_main,
-						 (argv) ? (char *const *)&argv[2] : (char *const *)NULL);
+						 (argv) ? (char *const *)&argv[2] : (char *const *)nullptr);
 		thread_running = true;
 		exit(0);
 	}

src/examples/mc_att_control_multiplatform/mc_att_control_start_nuttx.cpp

@@ -74,7 +74,7 @@ int mc_att_control_m_main(int argc, char *argv[])
 					     SCHED_PRIORITY_MAX - 5,
 					     1900,
 					     mc_att_control_start_main,
-					     (argv) ? (char *const *)&argv[2] : (char *const *)NULL);
+					     (argv) ? (char *const *)&argv[2] : (char *const *)nullptr);
 
 		return 0;
 	}

src/examples/mc_pos_control_multiplatform/mc_pos_control_start_nuttx.cpp

@@ -75,7 +75,7 @@ int mc_pos_control_m_main(int argc, char *argv[])
 					     SCHED_PRIORITY_MAX - 5,
 					     2500,
 					     mc_pos_control_start_main,
-					     (argv) ? (char *const *)&argv[2] : (char *const *)NULL);
+					     (argv) ? (char *const *)&argv[2] : (char *const *)nullptr);
 
 		return 0;
 	}