Use `c` specifier for `mrb_get_args`.

mrbgems/mruby-objectspace/src/mruby_objectspace.c

@@ -166,12 +166,8 @@ os_each_object_cb(mrb_state *mrb, struct RBasic *obj, void *ud)
 static mrb_value
 os_each_object(mrb_state *mrb, mrb_value self)
 {
-  mrb_value cls = mrb_nil_value();
-  struct os_each_object_data d;
-  mrb_get_args(mrb, "&!|C", &d.block, &cls);
-
-  d.target_module = mrb_nil_p(cls) ? NULL : mrb_class_ptr(cls);
-  d.count = 0;
+  struct os_each_object_data d = {0};
+  mrb_get_args(mrb, "&!|c", &d.block, &d.target_module);
   mrb_objspace_each_objects(mrb, os_each_object_cb, &d);
   return mrb_fixnum_value(d.count);
 }
@@ -379,10 +375,8 @@ os_memsize_of_all_cb(mrb_state *mrb, struct RBasic *obj, void *d)
 static mrb_value
 os_memsize_of_all(mrb_state *mrb, mrb_value self)
 {
-  mrb_value type = mrb_nil_value();
   struct os_memsize_of_all_cb_data data = { 0 };
-  mrb_get_args(mrb, "|C", &type);
-  data.type = mrb_class_ptr(type);
+  mrb_get_args(mrb, "|c", &data.type);
   mrb_objspace_each_objects(mrb, os_memsize_of_all_cb, &data);
   return mrb_fixnum_value(data.t);
 }

src/class.c

@@ -1168,22 +1168,22 @@ mrb_prepend_module(mrb_state *mrb, struct RClass *c, struct RClass *m)
 static mrb_value
 mrb_mod_prepend_features(mrb_state *mrb, mrb_value mod)
 {
-  mrb_value klass;
+  struct RClass *c;
 
   mrb_check_type(mrb, mod, MRB_TT_MODULE);
-  mrb_get_args(mrb, "C", &klass);
-  mrb_prepend_module(mrb, mrb_class_ptr(klass), mrb_class_ptr(mod));
+  mrb_get_args(mrb, "c", &c);
+  mrb_prepend_module(mrb, c, mrb_class_ptr(mod));
   return mod;
 }
 
 static mrb_value
 mrb_mod_append_features(mrb_state *mrb, mrb_value mod)
 {
-  mrb_value klass;
+  struct RClass *c;
 
   mrb_check_type(mrb, mod, MRB_TT_MODULE);
-  mrb_get_args(mrb, "C", &klass);
-  mrb_include_module(mrb, mrb_class_ptr(klass), mrb_class_ptr(mod));
+  mrb_get_args(mrb, "c", &c);
+  mrb_include_module(mrb, c, mrb_class_ptr(mod));
   return mod;
 }
 

src/kernel.c

@@ -520,11 +520,11 @@ mrb_obj_is_instance_of(mrb_state *mrb, mrb_value obj, struct RClass* c)
 static mrb_value
 obj_is_instance_of(mrb_state *mrb, mrb_value self)
 {
-  mrb_value arg;
+  struct RClass *c;
 
-  mrb_get_args(mrb, "C", &arg);
+  mrb_get_args(mrb, "c", &c);
 
-  return mrb_bool_value(mrb_obj_is_instance_of(mrb, self, mrb_class_ptr(arg)));
+  return mrb_bool_value(mrb_obj_is_instance_of(mrb, self, c));
 }
 
 /* 15.3.1.3.24 */
@@ -557,11 +557,11 @@ obj_is_instance_of(mrb_state *mrb, mrb_value self)
 static mrb_value
 mrb_obj_is_kind_of_m(mrb_state *mrb, mrb_value self)
 {
-  mrb_value arg;
+  struct RClass *c;
 
-  mrb_get_args(mrb, "C", &arg);
+  mrb_get_args(mrb, "c", &c);
 
-  return mrb_bool_value(mrb_obj_is_kind_of(mrb, self, mrb_class_ptr(arg)));
+  return mrb_bool_value(mrb_obj_is_kind_of(mrb, self, c));
 }
 
 KHASH_DECLARE(st, mrb_sym, char, FALSE)