XS(XS_PerlIO_get_layers);
XS(XS_Regexp_DESTROY);
XS(XS_Internals_hash_seed);
+XS(XS_Internals_rehash_seed);
XS(XS_Internals_HvREHASH);
void
XS_PerlIO_get_layers, file, "*;@");
newXS("Regexp::DESTROY", XS_Regexp_DESTROY, file);
newXSproto("Internals::hash_seed",XS_Internals_hash_seed, file, "");
+ newXSproto("Internals::rehash_seed",XS_Internals_rehash_seed, file, "");
newXSproto("Internals::HvREHASH", XS_Internals_HvREHASH, file, "\\%");
}
XSRETURN_UNDEF; /* Can't happen. */
}
-/* Maybe this should return the number of placeholders found in scalar context,
- and a list of them in list context. */
XS(XS_Internals_hv_clear_placehold)
{
dXSARGS;
HV *hv = (HV *) SvRV(ST(0));
-
- /* I don't care how many parameters were passed in, but I want to avoid
- the unused variable warning. */
-
- items = (I32)HvPLACEHOLDERS(hv);
-
- if (items) {
- HE *entry;
- I32 riter = HvRITER(hv);
- HE *eiter = HvEITER(hv);
- hv_iterinit(hv);
- /* This may look suboptimal with the items *after* the iternext, but
- it's quite deliberate. We only get here with items==0 if we've
- just deleted the last placeholder in the hash. If we've just done
- that then it means that the hash is in lazy delete mode, and the
- HE is now only referenced in our iterator. If we just quit the loop
- and discarded our iterator then the HE leaks. So we do the && the
- other way to ensure iternext is called just one more time, which
- has the side effect of triggering the lazy delete. */
- while ((entry = hv_iternext_flags(hv, HV_ITERNEXT_WANTPLACEHOLDERS))
- && items) {
- SV *val = hv_iterval(hv, entry);
-
- if (val == &PL_sv_placeholder) {
-
- /* It seems that I have to go back in the front of the hash
- API to delete a hash, even though I have a HE structure
- pointing to the very entry I want to delete, and could hold
- onto the previous HE that points to it. And it's easier to
- go in with SVs as I can then specify the precomputed hash,
- and don't have fun and games with utf8 keys. */
- SV *key = hv_iterkeysv(entry);
-
- hv_delete_ent (hv, key, G_DISCARD, HeHASH(entry));
- items--;
- }
- }
- HvRITER(hv) = riter;
- HvEITER(hv) = eiter;
- }
-
+ if (items != 1)
+ Perl_croak(aTHX_ "Usage: UNIVERSAL::hv_clear_placeholders(hv)");
+ hv_clear_placeholders(hv);
XSRETURN(0);
}
XSRETURN_UV(PERL_HASH_SEED);
}
+XS(XS_Internals_rehash_seed)
+{
+ /* Using dXSARGS would also have dITEM and dSP,
+ * which define 2 unused local variables. */
+ dMARK; dAX;
+ XSRETURN_UV(PL_rehash_seed);
+}
+
XS(XS_Internals_HvREHASH) /* Subject to change */
{
dXSARGS;