Some work

util.c

@@ -0,0 +1,13 @@
+#include "util.h"
+
+#include <stdio.h>
+
+void *malloc_safe(size_t size) {
+    void *ptr = malloc(size);
+    if (!ptr && size) {
+        static char message[] = "out of memory!\n";
+        fwrite(message, 1, sizeof(message) - 1, stdout);
+        abort();
+    }
+    return ptr;
+}