Add pausing

input.c

@@ -19,6 +19,7 @@ static int input_fd;
 static input_callback_t restart;
 static input_callback_t quit;
 static input_callback_t shoot;
+static input_callback_t pause_;
 
 static void key_press(int key)
 {
@@ -46,6 +47,9 @@ static void key_press(int key)
 		if (shoot != nullptr)
 			shoot();
 		break;
+	case KEY_P:
+		if (pause_ != nullptr)
+			pause_();
 	}
 }
 
@@ -74,7 +78,7 @@ static void key_repeat(int key)
 int input_init()
 {
 	memset(&input, 0, sizeof(input));
-	shoot = nullptr;
+	shoot = restart = quit = pause_ = nullptr;
 
 	input_fd = open("/dev/input/event0", O_RDONLY);
 	assert(input_fd != -1);
@@ -105,6 +109,11 @@ void input_on_quit(input_callback_t cb)
 	quit = cb;
 }
 
+void input_on_pause(input_callback_t cb)
+{
+	pause_ = cb;
+}
+
 void input_handle()
 {
 	struct input_event ev;