+#define GET_OBJ(obj, type, o) \
+ type *(o) = NULL; \
+\
+ Data_Get_Struct ((obj), type, (o));
+
+#define CHECK_BOOL(val) \
+ if (TYPE ((val)) != T_TRUE && TYPE ((val)) != T_FALSE) { \
+ rb_raise (rb_eTypeError, \
+ "wrong argument type %s (expected true or false)", \
+ rb_obj_classname ((val))); \
+ return Qnil; \
+ }
+
+#define CHECK_CLASS(val, klass) \
+ if (!rb_obj_is_kind_of ((val), (klass))) { \
+ rb_raise (rb_eTypeError, \
+ "wrong argument type %s (expected %s)", \
+ rb_obj_classname ((val)), \
+ rb_class2name ((klass))); \
+ return Qnil; \
+ }
+
+#define INSPECT(obj, type) \
+ char buf[128]; \
+\
+ GET_OBJ (obj, type, o); \
+\
+ snprintf (buf, sizeof (buf), \
+ "#<%s:%p ptr=%p>", rb_obj_classname ((obj)), \
+ (void *) obj, o->real); \
+\
+ return rb_str_new2 (buf);
+
+#ifndef __RB_ECORE_C