add point functions

src/utility.c

@@ -0,0 +1,35 @@
+#include <stdlib.h>
+
+#include "lfutility.h"
+
+Point Point_new(int x, int y) {
+    Point p;
+    p.x = x;
+    p.y = y;
+    return p;
+}
+
+Point *Point_new_p(int x, int y) {
+    Point *p = malloc(sizeof(struct Point));
+    p->x = x;
+    p->y = y;
+    return p;
+}
+int Point_cmp(const Point a, const Point b) {
+    if (a.x == b.x && a.y == b.y) {
+        return 1;
+    }
+    return 0;
+}
+
+int Point_cmp_p(const Point *a, const Point *b) {
+    if (a->x == b->x && a->y == b->y) {
+        return 1;
+    }
+    return 0;
+}
+
+int Point_cmp_v(const void *a, const void *b) {
+    return Point_cmp_p(a, b);
+}
+