int
rb_range_values(VALUE range, VALUE *begp, VALUE *endp, int *exclp)
{
VALUE b, e;
int excl;
if (rb_obj_is_kind_of(range, rb_cRange)) {
b = RANGE_BEG(range);
e = RANGE_END(range);
excl = EXCL(range);
}
else {
if (!rb_vm_respond_to(range, selBeg, false)) {
return 0;
}
if (!rb_vm_respond_to(range, selEnd, false)) {
return 0;
}
b = rb_vm_call(range, selBeg, 0, NULL);
e = rb_vm_call(range, selEnd, 0, NULL);
excl = RTEST(rb_vm_call(range, selExcludeEnd, 0, NULL));
}
*begp = b;
*endp = e;
*exclp = excl;
return 1;
}
static VALUE
exc_equal(VALUE exc, SEL sel, VALUE obj)
{
VALUE mesg, backtrace;
if (exc == obj) {
return Qtrue;
}
ID id_mesg = rb_intern("mesg");
if (rb_obj_class(exc) != rb_obj_class(obj)) {
SEL sel_message = sel_registerName("message");
SEL sel_backtrace = sel_registerName("backtrace");
if (!rb_vm_respond_to(obj, sel_message, false)
|| !rb_vm_respond_to(obj, sel_backtrace, false)) {
return Qfalse;
}
mesg = rb_vm_call(obj, sel_message, 0, NULL);
backtrace = rb_vm_call(obj, sel_backtrace, 0, NULL);
}
else {
mesg = rb_attr_get(obj, id_mesg);
backtrace = exc_backtrace(obj, 0);
}
if (!rb_equal(rb_attr_get(exc, id_mesg), mesg)) {
return Qfalse;
}
if (!rb_equal(exc_backtrace(exc, 0), backtrace)) {
return Qfalse;
}
return Qtrue;
}
int
rb_obj_respond_to(VALUE obj, ID id, int priv)
{
const char *id_name = rb_id2name(id);
SEL sel = sel_registerName(id_name);
if (!rb_vm_respond_to(obj, sel, priv)) {
char buf[100];
snprintf(buf, sizeof buf, "%s:", id_name);
sel = sel_registerName(buf);
return rb_vm_respond_to(obj, sel, priv) == true ? 1 : 0;
}
return 1;
}
static VALUE
interpret_value(rb_yaml_parser_t *parser, VALUE result, VALUE handler)
{
if (NIL_P(handler)) {
return result;
}
if (rb_vm_respond_to(handler, sel_call, 0)) {
return rb_vm_call(handler, sel_call, 1, &result);
}
else if (rb_vm_respond_to(handler, sel_yaml_new, 0)) {
return rb_vm_call(handler, sel_yaml_new, 1, &result);
}
return result;
}
static int
discrete_object_p(VALUE obj)
{
if (rb_obj_is_kind_of(obj, rb_cTime)) return FALSE; /* until Time#succ removed */
return rb_vm_respond_to(obj, selSucc, false);
}