1 files changed, 30 insertions, 12 deletions

diff --git a/src/utils.c b/src/utils.c
index 21ba882f..0f20435e 100644
--- a/src/utils.c
+++ b/src/utils.c
@@ -387,24 +387,23 @@ int num_items(const ReflItemList *items)
 }
 
 
-unsigned int *items_to_counts(ReflItemList *items)
+void union_op_items(ReflItemList *items, ReflItemList *newi)
 {
-	unsigned int *c;
-	int i;
+	int n, i;
 
-	c = new_list_count();
+	n = num_items(newi);
+	for ( i=0; i<n; i++ ) {
 
-	for ( i=0; i<num_items(items); i++ ) {
-		struct refl_item *r;
-		r = get_item(items, i);
-		set_count(c, r->h, r->k, r->l, 1);
-	}
+		struct refl_item *r = get_item(newi, i);
+		if ( find_op(items, r->op) ) continue;
+
+		add_item_with_op(items, r->h, r->k, r->l, r->op);
 
-	return c;
+	}
 }
 
 
-void union_op_items(ReflItemList *items, ReflItemList *newi)
+void union_items(ReflItemList *items, ReflItemList *newi)
 {
 	int n, i;
 
@@ -412,9 +411,28 @@ void union_op_items(ReflItemList *items, ReflItemList *newi)
 	for ( i=0; i<n; i++ ) {
 
 		struct refl_item *r = get_item(newi, i);
-		if ( find_op(items, r->op) ) continue;
+		if ( find_item(items, r->h, r->k, r->l) ) continue;
 
 		add_item_with_op(items, r->h, r->k, r->l, r->op);
 
 	}
 }
+
+
+ReflItemList *intersection_items(ReflItemList *i1, ReflItemList *i2)
+{
+	int n, i;
+	ReflItemList *res = new_items();
+
+	n = num_items(i1);
+	for ( i=0; i<n; i++ ) {
+
+		struct refl_item *r = get_item(i1, i);
+		if ( find_item(i2, r->h, r->k, r->l) ) {
+			add_item_with_op(res, r->h, r->k, r->l, r->op);
+		}
+
+	}
+
+	return res;
+}