From 8f8ad4361fbe9b18650b1c724974c89972c0a69e Mon Sep 17 00:00:00 2001
From: Daniel Knuettel <daknuett@gmail.com>
Date: Thu, 9 Mar 2017 16:54:23 +0100
Subject: [PATCH] fixed destructor

---
 main.c | 22 ++++++++++++++++++----
 1 file changed, 18 insertions(+), 4 deletions(-)

diff --git a/main.c b/main.c
index 5ba64a0..7314dd6 100644
--- a/main.c
+++ b/main.c
@@ -52,14 +52,15 @@ static struct termios oldt, newt;
 char  * playfield;
 char ** horizon;
 
+// break the mainloop, if there was a SIGINT
 static volatile char sigint_received = 0;
+static struct termios oldt, newt;
 
 int main(void)
 {
 
 	// set up the terminal for our hacky game....
 
-	static struct termios oldt, newt;
 	tcgetattr(STDIN_FILENO, &oldt);
 	newt = oldt;
 	newt.c_lflag &= ~(ICANON | ECHO);
@@ -84,6 +85,8 @@ int main(void)
 		playfield[pos] = ' ';
 		horizon[0][to_place] = ' ';
 
+		// actually if...else produces
+		// smaller objectcode than switch
 		if(input == KEY_RIGHT)
 		{
 			pos++;
@@ -108,11 +111,15 @@ int main(void)
 		
 		print_horizon(horizon);
 
+		// set the player cursor
 		playfield[pos] = CHAR_ME; 
+
+		// add the next enemy
 		to_place = (random() & 0xff) % WIDTH;
 		horizon[0][to_place] = CHAR_ENEMY;
 		put_line(playfield);
 
+		// player got hit.
 		if(horizon[LINES - 1][pos] == CHAR_ENEMY)
 		{
 			printf("GAME OVER!\nYour score was: %llu\n", score);
@@ -127,7 +134,7 @@ int main(void)
 		}
 		if(score == 0)
 		{
-			printf("Congrats. You won the game.\nAnd you have absolutely no life.\nat all.\n");
+			printf("Congrats. You won the game.\n");
 			break;
 		}
 
@@ -140,15 +147,20 @@ int main(void)
 		}
 		input = get_last_key_or_default();
 	}
-
-	tcsetattr(STDIN_FILENO, TCSANOW, &oldt);
 	return 0;
 }
 
+
+// We need those signal handlers to
+// free the memory properly.
+// If they do not get caught the
+// destructors will be skipped.
+// should not happen.
 void __attribute__((cold)) handle_sigint(int signum)
 {
 	sigint_received = 1;
 }
+// should not happen.
 void __attribute__((cold)) handle_sigterm(int signum)
 {
 	printf("\n\nTERMINATED!\n");
@@ -172,6 +184,8 @@ void __attribute__((destructor)) clean(void)
 {
 	free(playfield);
 	delete_horizon(horizon);
+
+	tcsetattr(STDIN_FILENO, TCSANOW, &oldt);
 	printf("\n");
 }