--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/foosdk/sdk/pfc/sort2.h	Mon Jan 05 02:15:46 2026 -0500
@@ -0,0 +1,34 @@
+#pragma once
+
+#include "sort.h"
+
+// 2023 additions
+
+
+namespace pfc {
+
+	typedef array_t<size_t> permutation_t;
+
+	permutation_t make_identitiy(size_t);
+
+	template<typename container_t, typename compare_t>
+	permutation_t sort_get_permutation(container_t const& data, compare_t compare) {
+		const size_t count = std::size(data);
+		auto ret = make_identitiy( count );
+		if ( count > 0 ) sort_get_permutation_t(data, compare, count, ret.get_ptr() );
+		return ret;
+	}
+	template<typename container_t, typename compare_t>
+	permutation_t sort_stable_get_permutation(container_t const& data, compare_t compare) {
+		const size_t count = std::size(data);
+		auto ret = make_identitiy( count );
+		if ( count > 0 ) sort_stable_get_permutation_t(data, compare, count, ret.get_ptr() );
+		return ret;
+	}
+
+	template<typename container_t>
+	void reorder(container_t& data, permutation_t const& order) {
+		PFC_ASSERT( std::size(data) == std::size(order) );
+		reorder_t( data, order.get_ptr(), order.get_size() );
+	}
+}
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