#define HvRITER_set(hv,r) Perl_hv_riter_set(aTHX_ (HV*)(hv), r)
#define HvEITER_set(hv,e) Perl_hv_eiter_set(aTHX_ (HV*)(hv), e)
#define HvRITER_get(hv) (SvOOK(hv) ? HvAUX(hv)->xhv_riter : -1)
-#define HvEITER_get(hv) (SvOOK(hv) ? HvAUX(hv)->xhv_eiter : 0)
+#define HvEITER_get(hv) (SvOOK(hv) ? HvAUX(hv)->xhv_eiter : NULL)
#define HvNAME(hv) HvNAME_get(hv)
/* Checking that hv is a valid package stash is the
/* FIXME - all of these should use a UTF8 aware API, which should also involve
getting the length. */
/* This macro may go away without notice. */
-#define HvNAME_HEK(hv) (SvOOK(hv) ? HvAUX(hv)->xhv_name : 0)
+#define HvNAME_HEK(hv) (SvOOK(hv) ? HvAUX(hv)->xhv_name : NULL)
#define HvNAME_get(hv) ((SvOOK(hv) && (HvAUX(hv)->xhv_name)) \
- ? HEK_KEY(HvAUX(hv)->xhv_name) : 0)
+ ? HEK_KEY(HvAUX(hv)->xhv_name) : NULL)
#define HvNAMELEN_get(hv) ((SvOOK(hv) && (HvAUX(hv)->xhv_name)) \
? HEK_LEN(HvAUX(hv)->xhv_name) : 0)