Add checks to cell structure

gds-parser/gds-types.h

@@ -35,6 +35,8 @@
 #include <glib.h>
 
 #define CELL_NAME_MAX (100) /**< @brief Maximum length of a gds_cell::name or a gds_library::name */
+
+/* Maybe use the macros that ship with the compiler? */
 #define MIN(a,b) (((a) < (b)) ? (a) : (b)) /**< @brief Return smaller number */
 #define MAX(a,b) (((a) > (b)) ? (a) : (b)) /**< @brief Return bigger number */
 
@@ -59,6 +61,21 @@ struct gds_point {
 	int y;
 };
 
+/**
+ * @brief Stores the result of the cell checks.
+ */
+struct gds_cell_checks {
+	int unresolved_child_count; /**< @brief Number of unresolved cell instances inside this cell */
+	int affected_by_reference_loop; /**< @brief 1 if the cell is affected by a reference loop and therefore not renderable */
+	/**
+	 * @brief For the internal use of the checker.
+	 * @warning Do not use this structure and its contents!
+	 */
+	struct _check_internals {
+		int marker;
+	} _internal;
+};
+
 /**
  * @brief Date information for cells and libraries
  */
@@ -105,6 +122,7 @@ struct gds_cell {
 	GList *child_cells; /**< @brief List of #gds_cell_instance elements */
 	GList *graphic_objs; /**< @brief List of #gds_graphics */
 	struct gds_library *parent_library; /**< @brief Pointer to parent library */
+	struct gds_cell_checks checks; /**< @brief Checking results */
 };
 
 /**