{
const int flags_masked = flags & HVhek_MASK;
char *k;
- register HEK *hek;
+ HEK *hek;
PERL_ARGS_ASSERT_SAVE_HEK_FLAGS;
Returns the SV which corresponds to the specified key in the hash.
The absolute value of C<klen> is the length of the key. If C<klen> is
negative the key is assumed to be in UTF-8-encoded Unicode. If
-C<lval> is set then the fetch will be part of a store. Check that the
+C<lval> is set then the fetch will be part of a store. This means that if
+there is no value in the hash associated with the given key, then one is
+created and a pointer to it is returned. The C<SV*> it points to can be
+assigned to. But always check that the
return value is non-null before dereferencing it to an C<SV*>.
See L<perlguts/"Understanding the Magic of Tied Hashes and Arrays"> for more
int k_flags, I32 d_flags, U32 hash)
{
dVAR;
- register XPVHV* xhv;
- register HE *entry;
- register HE **oentry;
+ XPVHV* xhv;
+ HE *entry;
+ HE **oentry;
bool is_utf8 = (k_flags & HVhek_UTF8) ? TRUE : FALSE;
int masked_flags;
S_hsplit(pTHX_ HV *hv)
{
dVAR;
- register XPVHV* const xhv = (XPVHV*)SvANY(hv);
+ XPVHV* const xhv = (XPVHV*)SvANY(hv);
const I32 oldsize = (I32) xhv->xhv_max+1; /* HvMAX(hv)+1 (sick) */
- register I32 newsize = oldsize * 2;
- register I32 i;
+ I32 newsize = oldsize * 2;
+ I32 i;
char *a = (char*) HvARRAY(hv);
- register HE **aep;
+ HE **aep;
int longest_chain = 0;
int was_shared;
int right_length = 0;
HE **oentry = aep;
HE *entry = *aep;
- register HE **bep;
+ HE **bep;
if (!entry) /* non-existent */
continue;
aep = HvARRAY(hv);
for (i=0; i<newsize; i++,aep++) {
- register HE *entry = *aep;
+ HE *entry = *aep;
while (entry) {
/* We're going to trash this HE's next pointer when we chain it
into the new hash below, so store where we go next. */
Perl_hv_ksplit(pTHX_ HV *hv, IV newmax)
{
dVAR;
- register XPVHV* xhv = (XPVHV*)SvANY(hv);
+ XPVHV* xhv = (XPVHV*)SvANY(hv);
const I32 oldsize = (I32) xhv->xhv_max+1; /* HvMAX(hv)+1 (sick) */
- register I32 newsize;
- register I32 i;
- register char *a;
- register HE **aep;
+ I32 newsize;
+ I32 i;
+ char *a;
+ HE **aep;
PERL_ARGS_ASSERT_HV_KSPLIT;
if (!entry) /* non-existent */
continue;
do {
- register I32 j = (HeHASH(entry) & newsize);
+ I32 j = (HeHASH(entry) & newsize);
if (j != i) {
j -= i;
=for apidoc hv_clear
Frees the all the elements of a hash, leaving it empty.
-The XS equivalent of %hash = (). See also L</hv_undef>.
+The XS equivalent of C<%hash = ()>. See also L</hv_undef>.
+
+If any destructors are triggered as a result, the hv itself may
+be freed.
=cut
*/
Perl_hv_clear(pTHX_ HV *hv)
{
dVAR;
- register XPVHV* xhv;
+ XPVHV* xhv;
if (!hv)
return;
xhv = (XPVHV*)SvANY(hv);
+ ENTER;
+ SAVEFREESV(SvREFCNT_inc_simple_NN(hv));
if (SvREADONLY(hv) && HvARRAY(hv) != NULL) {
/* restricted hash: convert all keys to placeholders */
STRLEN i;
mro_isa_changed_in(hv);
HvEITER_set(hv, NULL);
}
+ LEAVE;
}
/*
STRLEN index = 0;
XPVHV * const xhv = (XPVHV*)SvANY(hv);
SV *sv;
- const bool save = !!SvREFCNT(hv);
PERL_ARGS_ASSERT_HFREEENTRIES;
- if (save) {
- ENTER;
- SAVEFREESV(SvREFCNT_inc_simple_NN(hv));
- }
-
while ((sv = Perl_hfree_next_entry(aTHX_ hv, &index))||xhv->xhv_keys) {
SvREFCNT_dec(sv);
}
-
- if (save) LEAVE;
}
/*
=for apidoc hv_undef
-Undefines the hash. The XS equivalent of undef(%hash).
+Undefines the hash. The XS equivalent of C<undef(%hash)>.
As well as freeing all the elements of the hash (like hv_clear()), this
also frees any auxiliary data and storage associated with the hash.
+
+If any destructors are triggered as a result, the hv itself may
+be freed.
+
See also L</hv_clear>.
=cut
Perl_hv_undef_flags(pTHX_ HV *hv, U32 flags)
{
dVAR;
- register XPVHV* xhv;
+ XPVHV* xhv;
const char *name;
+ const bool save = !!SvREFCNT(hv);
if (!hv)
return;
);
hv_name_set(hv, NULL, 0, 0);
}
+ if (save) {
+ ENTER;
+ SAVEFREESV(SvREFCNT_inc_simple_NN(hv));
+ }
hfreeentries(hv);
if (SvOOK(hv)) {
struct xpvhv_aux * const aux = HvAUX(hv);
xhv->xhv_max = 7; /* HvMAX(hv) = 7 (it's a normal hash) */
HvARRAY(hv) = 0;
}
- HvPLACEHOLDERS_set(hv, 0);
+ /* if we're freeing the HV, the SvMAGIC field has been reused for
+ * other purposes, and so there can't be any placeholder magic */
+ if (SvREFCNT(hv))
+ HvPLACEHOLDERS_set(hv, 0);
if (SvRMAGICAL(hv))
mg_clear(MUTABLE_SV(hv));
+ if (save) LEAVE;
}
/*
Perl_hv_iternext_flags(pTHX_ HV *hv, I32 flags)
{
dVAR;
- register XPVHV* xhv;
- register HE *entry;
+ XPVHV* xhv;
+ HE *entry;
HE *oldentry;
MAGIC* mg;
struct xpvhv_aux *iter;
S_unshare_hek_or_pvn(pTHX_ const HEK *hek, const char *str, I32 len, U32 hash)
{
dVAR;
- register XPVHV* xhv;
+ XPVHV* xhv;
HE *entry;
- register HE **oentry;
+ HE **oentry;
bool is_utf8 = FALSE;
int k_flags = 0;
const char * const save = str;
S_share_hek_flags(pTHX_ const char *str, I32 len, register U32 hash, int flags)
{
dVAR;
- register HE *entry;
+ HE *entry;
const int flags_masked = flags & HVhek_MASK;
const U32 hindex = hash & (I32) HvMAX(PL_strtab);
- register XPVHV * const xhv = (XPVHV*)SvANY(PL_strtab);
+ XPVHV * const xhv = (XPVHV*)SvANY(PL_strtab);
PERL_ARGS_ASSERT_SHARE_HEK_FLAGS;
memEQ(HEK_KEY(chain->refcounted_he_hek), keypv, keylen) &&
utf8_flag == (HEK_FLAGS(chain->refcounted_he_hek) & HVhek_UTF8)
#endif
- )
- return
- flags & REFCOUNTED_HE_EXISTS
- ? (chain->refcounted_he_data[0] & HVrhek_typemask)
- == HVrhek_delete
- ? NULL
- : &PL_sv_yes
- : sv_2mortal(refcounted_he_value(chain));
+ ) {
+ if (flags & REFCOUNTED_HE_EXISTS)
+ return (chain->refcounted_he_data[0] & HVrhek_typemask)
+ == HVrhek_delete
+ ? NULL : &PL_sv_yes;
+ return sv_2mortal(refcounted_he_value(chain));
+ }
}
return flags & REFCOUNTED_HE_EXISTS ? NULL : &PL_sv_placeholder;
}
* Local variables:
* c-indentation-style: bsd
* c-basic-offset: 4
- * indent-tabs-mode: t
+ * indent-tabs-mode: nil
* End:
*
- * ex: set ts=8 sts=4 sw=4 noet:
+ * ex: set ts=8 sts=4 sw=4 et:
*/
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