described elsewhere in this document.
=for apidoc Am|SV*|HeSVKEY|HE* he
-Returns the key as an C<SV*>, or C<Nullsv> if the hash entry does not
+Returns the key as an C<SV*>, or C<NULL> if the hash entry does not
contain an C<SV*> key.
=for apidoc Am|SV*|HeSVKEY_force|HE* he
#define HePV(he,lp) ((HeKLEN(he) == HEf_SVKEY) ? \
SvPV(HeKEY_sv(he),lp) : \
(((lp = HeKLEN(he)) >= 0) ? \
- HeKEY(he) : Nullch))
+ HeKEY(he) : NULL))
#define HeSVKEY(he) ((HeKEY(he) && \
HeKLEN(he) == HEf_SVKEY) ? \
- HeKEY_sv(he) : Nullsv)
+ HeKEY_sv(he) : NULL)
#define HeSVKEY_force(he) (HeKEY(he) ? \
((HeKLEN(he) == HEf_SVKEY) ? \
#define HV_ITERNEXT_WANTPLACEHOLDERS 0x01 /* Don't skip placeholders. */
#define hv_iternext(hv) hv_iternext_flags(hv, 0)
-#define hv_magic(hv, gv, how) sv_magic((SV*)(hv), (SV*)(gv), how, Nullch, 0)
+#define hv_magic(hv, gv, how) sv_magic((SV*)(hv), (SV*)(gv), how, NULL, 0)
/* available as a function in hv.c */
#define Perl_sharepvn(sv, len, hash) HEK_KEY(share_hek(sv, len, hash))