Initial import of libdpf.

Co-authored-by: Cursor <cursoragent@cursor.com>

test/tests/helpers/domain_walk.hpp

@@ -0,0 +1,24 @@
+#ifndef LIBDPF_TEST_TESTS_HELPERS_DOMAIN_WALK_HPP__
+#define LIBDPF_TEST_TESTS_HELPERS_DOMAIN_WALK_HPP__
+
+// eval_interval / eval_full emit points in integer order of the input bits
+// (the same order as operator++ for ordinary integers). xor_wrapper::operator++
+// is characteristic-2 addition, XOR 1, so it does not walk that domain.
+template <typename InputT>
+InputT next_domain_point(InputT cur)
+{
+    if constexpr (dpf::utils::has_characteristic_two_v<InputT>)
+    {
+        using narrow = dpf::utils::integral_type_from_bitlength_t<dpf::utils::bitlength_of_v<InputT>>;
+        auto bits = static_cast<narrow>(dpf::utils::to_integral_type<InputT>{}(cur));
+        bits = static_cast<narrow>(bits + narrow{1});
+        return dpf::utils::make_from_integral_value<InputT>{}(bits);
+    }
+    else
+    {
+        ++cur;
+        return cur;
+    }
+}
+
+#endif  // LIBDPF_TEST_TESTS_HELPERS_DOMAIN_WALK_HPP__