return boolSV(strEQ(name, "UNIVERSAL"));
}
+/*
+=for apidoc sv_derived_from
+
+Returns a boolean indicating whether the SV is derived from the specified
+class. This is the function that implements C<UNIVERSAL::isa>. It works
+for class names as well as for objects.
+
+=cut
+*/
+
bool
Perl_sv_derived_from(pTHX_ SV *sv, const char *name)
{
newXS("UNIVERSAL::VERSION", XS_UNIVERSAL_VERSION, file);
}
-#ifdef PERL_OBJECT
-#define NO_XSLOCKS
-#endif /* PERL_OBJECT */
-
#include "XSUB.h"
XS(XS_UNIVERSAL_isa)
Perl_croak(aTHX_ "Usage: UNIVERSAL::isa(reference, kind)");
sv = ST(0);
+
+ if (!SvOK(sv) || !(SvROK(sv) || SvCUR(sv)))
+ XSRETURN_UNDEF;
+
name = (char *)SvPV(ST(1),n_a);
ST(0) = boolSV(sv_derived_from(sv, name));
Perl_croak(aTHX_ "Usage: UNIVERSAL::can(object-ref, method)");
sv = ST(0);
+
+ if (!SvOK(sv) || !(SvROK(sv) || SvCUR(sv)))
+ XSRETURN_UNDEF;
+
name = (char *)SvPV(ST(1),n_a);
rv = &PL_sv_undef;