From 7c70cb4eb45214d6867081744e3af6a0f715b6b0 Mon Sep 17 00:00:00 2001
From: Sheldon Lee <sheldon.m.lee@gmail.com>
Date: Fri, 12 Jun 2020 22:50:03 +0100
Subject: [PATCH] added terminal interrupt handlingw

---
 main.c | 23 +++++++++++++++++------
 1 file changed, 17 insertions(+), 6 deletions(-)

diff --git a/main.c b/main.c
index 16598e5..d4d07a1 100644
--- a/main.c
+++ b/main.c
@@ -1,14 +1,21 @@
 #include <stdio.h>
-#include <stdbool.h>
 #include <ncurses.h>
 #include <unistd.h>
 #include <math.h>
+#include <signal.h>
 #include "grid.h"
 #include "vect.h"
 
-void contain(int* pos, int* velocity, int min, int max);
+static volatile int running = 1;
+
+static void contain(int* pos, int* velocity, int min, int max);
+// if ^C is pressed, set running flag to false 
+static void signalHandler(int sig);
+
 int main()
 { 
+	signal(SIGINT, signalHandler);
+	int count = 0; 
 	//init 
 	initscr();
 	//noecho();
@@ -29,9 +36,7 @@ int main()
 	initGrid(&grid, width, height);
 	putPixel(&grid, pos.x, pos.y);
 
-	while (1) {
-		clear();
-
+	while (running) {
 		clearGrid(&grid);
 		putPixel(&grid, pos.x, pos.y);
 		drawGrid(&grid);
@@ -49,7 +54,7 @@ int main()
 	return 0;
 }
 
-void contain(int* pos, int* velocity, int min, int max)
+static void contain(int* pos, int* velocity, int min, int max)
 {
 	bool above_max = max < *pos;
 	bool below_min = *pos < min;
@@ -60,3 +65,9 @@ void contain(int* pos, int* velocity, int min, int max)
 		*velocity *= -1;
 	}
 }
+
+static void signalHandler(int sig)
+{
+	printf("interrupt\n");
+	running = 0;
+}