void
rb_extend_object(VALUE obj, VALUE module)
{
VALUE klass;
if (TYPE(obj) == T_CLASS && RCLASS_RUBY(obj)) {
VALUE sklass = rb_make_singleton_class(RCLASS_SUPER(obj));
RCLASS_SET_SUPER(obj, sklass);
klass = *(VALUE *)sklass;
}
else {
klass = rb_singleton_class(obj);
}
rb_include_module(klass, module);
VALUE m = module;
do {
VALUE ary = rb_attr_get(m, idIncludedModules);
if (ary != Qnil) {
for (int i = 0, count = RARRAY_LEN(ary); i < count; i++) {
VALUE mod = RARRAY_AT(ary, i);
rb_extend_object(obj, mod);
}
}
m = RCLASS_SUPER(m);
}
while (m == 0 || RCLASS_SINGLETON(m));
}
static VALUE
rb_mod_append_features(VALUE module, SEL sel, VALUE include)
{
VALUE orig = include;
switch (TYPE(include)) {
case T_CLASS:
case T_MODULE:
break;
default:
Check_Type(include, T_CLASS);
break;
}
if (RCLASS_RUBY(include)) {
VALUE sinclude = rb_make_singleton_class(RCLASS_SUPER(include));
RCLASS_SET_SUPER(include, sinclude);
include = sinclude;
}
rb_include_module2(include, orig, module, true, true);
VALUE m = module;
do {
VALUE ary = rb_attr_get(m, idIncludedModules);
if (ary != Qnil) {
for (int i = 0, count = RARRAY_LEN(ary); i < count; i++) {
VALUE mod = RARRAY_AT(ary, i);
rb_mod_append_features(mod, sel, include);
}
}
m = RCLASS_SUPER(m);
}
while (m == 0 || RCLASS_SINGLETON(m));
return module;
}
VALUE
rb_make_metaclass(VALUE obj, VALUE super)
{
VALUE klass;
if (TYPE(obj) == T_CLASS && RCLASS_SINGLETON(obj)) {
RBASIC(obj)->klass = rb_cClass;
klass = rb_cClass;
}
else {
VALUE objk = RBASIC(obj)->klass;
if (RCLASS_SINGLETON(objk)
&& rb_singleton_class_attached_object(objk) == obj) {
klass = objk;
}
else {
klass = rb_make_singleton_class(super);
RBASIC(obj)->klass = klass;
rb_singleton_class_attached(klass, obj);
}
}
return klass;
}
