1 files changed, 58 insertions, 0 deletions
diff --git a/libs/simclist-1.5/examples/ex3.c b/libs/simclist-1.5/examples/ex3.c
new file mode 100644
index 0000000..74d3091
--- /dev/null
+++ b/libs/simclist-1.5/examples/ex3.c
@@ -0,0 +1,58 @@
+#include <stdio.h>
+
+#include <simclist.h>
+
+typedef struct {
+	int x, y;
+} point2D;
+
+typedef struct {
+	point2D a, b, c, d;
+} rectangle;	/* custom data type to store in list */
+
+/* this function returns the size of elements */
+size_t mymeter(const void *el) {
+	/* every element has the constant size of a rectangle structure */
+	return sizeof(rectangle);
+}
+
+/*
+ * compare rectangles by area
+ * 
+ * this function compares two elements:
+ * <0: a greater than b
+ * 0: a equivalent to b
+ * >0: b greater than a
+ */
+int mycomparator(const void *a, const void *b) {
+	/* compare areas */
+	const rectangle *A = (rectangle *) a;
+	const rectangle *B = (rectangle *) b;
+	unsigned int    areaA, areaB;
+	areaA = ((A->c.y - A->b.y) * (A->b.x - A->a.x));
+	areaB = ((B->c.y - B->b.y) * (B->b.x - B->a.x));
+	return (areaA < areaB) - (areaA > areaB);
+}
+
+int main() {
+	rectangle rect;
+	list_t l;
+
+	list_init(&l);
+
+	/* setting the custom spanning function */
+	list_attributes_copy(&l, mymeter, 1);
+
+	/* acquire rectangles and insert in list ... */
+
+	/* setting the custom area comparator */
+	list_attributes_comparator(&l, mycomparator);
+	list_sort(&l, -1);	/* sorting by area (descending) */
+
+	/* [display list ...] */
+
+    list_destroy(&l);
+
+	return 0;
+}
+