[TEST]UPSTREAM: Pick some source changes from 48080d0a97

* Sync new folder structure

AMSS_NCKU_source/AHF_Direct/gr.h

@@ -0,0 +1,40 @@
+#ifndef GR_H
+#define GR_H
+namespace AHFinderDirect
+{
+
+	enum expansion_status
+	{
+		expansion_success,
+
+		expansion_failure__surface_nonfinite,
+
+		expansion_failure__surface_too_large,
+
+		expansion_failure__surface_outside_grid,
+
+		expansion_failure__surface_in_excised_region,
+
+		expansion_failure__geometry_nonfinite,
+
+		expansion_failure__gij_not_positive_definite // no comma
+	};
+
+	// expansion.cc
+	enum expansion_status
+	expansion(patch_system *ps_ptr, fp add_to_expansion,
+			  bool initial_flag,
+			  bool Jacobian_flag = false,
+			  jtutil::norm<fp> *H_norms_ptr = NULL);
+
+	// expansion_Jacobian.cc
+	enum expansion_status
+	expansion_Jacobian(patch_system *ps_ptr, Jacobian *Jac_ptr,
+					   fp add_to_expansion,
+					   bool initial_flag,
+					   bool print_msg_flag = false);
+
+	//******************************************************************************
+
+} // namespace AHFinderDirect
+#endif /* GR_H  */