collision added, game over message

src/include/main.h

@@ -1,8 +1,12 @@
 #ifndef MAIN_H
 #define MAIN_H
 
+#include "snake.h"
+#include "field.h"
+
 void die(char *, ...);
 void free_s(void *);
 int irandom(int, int);
+void game_over(Snake *, Field *, char *, ...);
 
 #endif

src/include/snake.h

@@ -22,5 +22,6 @@ void delete_snake(Snake *);
 void snake_forward(Snake *, int);
 void snake_print(Snake *);
 int snake_eat(Snake *, Field *);
+int snake_collide(Snake *, int, int);
 
 #endif

src/main.c

@@ -32,6 +32,21 @@ int irandom(int lower, int upper) {
     return i;
 }
 
+void game_over(Snake *s, Field *f, char *fmt, ...) {
+    va_list args;
+    va_start(args, fmt);
+
+    delete_snake(s);
+    delete_field(f);
+    endwin();
+
+    vprintf(fmt, args);
+    printf("\n");
+
+    va_end(args);
+    exit(0);
+}
+
 int main(void) {
     int c, dirn, score;
     Snake *s;
@@ -74,11 +89,13 @@ int main(void) {
                     dirn = LEFT;
             break;
             case quit_key:
-                goto quit;
+                game_over(s, f, "SEE YOU LATER! SCORE: %d", score);
             break;
         }
 
         snake_forward(s, dirn);
+        if (snake_collide(s, getmaxx(stdscr), getmaxy(stdscr) - 1))
+            game_over(s, f, "!! GAME OVER !! COLLISION !! SCORE: %d", score);
         score += snake_eat(s, f);
 
         box(stdscr, 0, 0);
@@ -89,9 +106,4 @@ int main(void) {
         refresh();
         napms(screen_speed);
     } 
-
-quit:
-    delete_snake(s);
-    delete_field(f);
-    endwin();
 }

src/snake.c

@@ -83,3 +83,22 @@ int snake_eat(Snake *s, Field *f) {
 
     return 0;
 }
+
+int snake_collide(Snake *s, int x_max, int y_max) {
+    if (s->n[0]->x == x_max)
+        return 1;
+    if (s->n[0]->y == y_max)
+        return 1;
+    if (s->n[0]->x == 0)
+        return 1;
+    if (s->n[0]->y == 0)
+        return 1;
+
+    for (size_t i = 1; i < s->len; i++) {
+        if (s->n[0]->x == s->n[i]->x)
+            if (s->n[0]->y == s->n[i]->y)
+                return 1;
+    }
+
+    return 0;
+}