/* hv.c
*
- * Copyright (c) 1991-1999, Larry Wall
+ * Copyright (c) 1991-2001, Larry Wall
*
* You may distribute under the terms of either the GNU General Public
* License or the Artistic License, as specified in the README file.
#define PERL_IN_HV_C
#include "perl.h"
+
STATIC HE*
S_new_he(pTHX)
{
{
register HE* he;
register HE* heend;
- New(54, PL_he_root, 1008/sizeof(HE), HE);
- he = PL_he_root;
+ XPV *ptr;
+ New(54, ptr, 1008/sizeof(XPV), XPV);
+ ptr->xpv_pv = (char*)PL_he_arenaroot;
+ PL_he_arenaroot = ptr;
+
+ he = (HE*)ptr;
heend = &he[1008 / sizeof(HE) - 1];
+ PL_he_root = ++he;
while (he < heend) {
HeNEXT(he) = (HE*)(he + 1);
he++;
HeNEXT(he) = 0;
}
+#ifdef PURIFY
+
+#define new_HE() (HE*)safemalloc(sizeof(HE))
+#define del_HE(p) safefree((char*)p)
+
+#else
+
+#define new_HE() new_he()
+#define del_HE(p) del_he(p)
+
+#endif
+
STATIC HEK *
S_save_hek(pTHX_ const char *str, I32 len, U32 hash)
{
char *k;
register HEK *hek;
-
+ bool is_utf8 = FALSE;
+
+ if (len < 0) {
+ len = -len;
+ is_utf8 = TRUE;
+ }
+
New(54, k, HEK_BASESIZE + len + 1, char);
hek = (HEK*)k;
Copy(str, HEK_KEY(hek), len, char);
- *(HEK_KEY(hek) + len) = '\0';
HEK_LEN(hek) = len;
HEK_HASH(hek) = hash;
+ HEK_UTF8(hek) = (char)is_utf8;
return hek;
}
void
Perl_unshare_hek(pTHX_ HEK *hek)
{
- unsharepvn(HEK_KEY(hek),HEK_LEN(hek),HEK_HASH(hek));
+ unsharepvn(HEK_KEY(hek),HEK_UTF8(hek)?-HEK_LEN(hek):HEK_LEN(hek),
+ HEK_HASH(hek));
}
#if defined(USE_ITHREADS)
if (!e)
return Nullhe;
- ret = new_he();
- HeNEXT(ret) = (HE*)NULL;
+ /* look for it in the table first */
+ ret = (HE*)ptr_table_fetch(PL_ptr_table, e);
+ if (ret)
+ return ret;
+
+ /* create anew and remember what it is */
+ ret = new_HE();
+ ptr_table_store(PL_ptr_table, e, ret);
+
+ HeNEXT(ret) = he_dup(HeNEXT(e),shared);
if (HeKLEN(e) == HEf_SVKEY)
HeKEY_sv(ret) = SvREFCNT_inc(sv_dup(HeKEY_sv(e)));
else if (shared)
- HeKEY_hek(ret) = share_hek(HeKEY(e), HeKLEN(e), HeHASH(e));
+ HeKEY_hek(ret) = share_hek(HeKEY(e), HeKLEN_UTF8(e), HeHASH(e));
else
- HeKEY_hek(ret) = save_hek(HeKEY(e), HeKLEN(e), HeHASH(e));
+ HeKEY_hek(ret) = save_hek(HeKEY(e), HeKLEN_UTF8(e), HeHASH(e));
HeVAL(ret) = SvREFCNT_inc(sv_dup(HeVAL(e)));
return ret;
}
/* (klen == HEf_SVKEY) is special for MAGICAL hv entries, meaning key slot
* contains an SV* */
+/*
+=for apidoc hv_fetch
+
+Returns the SV which corresponds to the specified key in the hash. The
+C<klen> is the length of the key. If C<lval> is set then the fetch will be
+part of a store. Check that the return value is non-null before
+dereferencing it to a C<SV*>.
+
+See L<perlguts/"Understanding the Magic of Tied Hashes and Arrays"> for more
+information on how to use this function on tied hashes.
+
+=cut
+*/
+
SV**
-Perl_hv_fetch(pTHX_ HV *hv, const char *key, U32 klen, I32 lval)
+Perl_hv_fetch(pTHX_ HV *hv, const char *key, I32 klen, I32 lval)
{
register XPVHV* xhv;
register U32 hash;
register HE *entry;
SV *sv;
+ bool is_utf8 = FALSE;
+ const char *keysave = key;
if (!hv)
return 0;
+ if (klen < 0) {
+ klen = -klen;
+ is_utf8 = TRUE;
+ }
+
if (SvRMAGICAL(hv)) {
- if (mg_find((SV*)hv,'P')) {
- dTHR;
+ if (mg_find((SV*)hv, PERL_MAGIC_tied) || SvGMAGICAL((SV*)hv)) {
sv = sv_newmortal();
mg_copy((SV*)hv, sv, key, klen);
PL_hv_fetch_sv = sv;
return &PL_hv_fetch_sv;
}
#ifdef ENV_IS_CASELESS
- else if (mg_find((SV*)hv,'E')) {
+ else if (mg_find((SV*)hv, PERL_MAGIC_env)) {
U32 i;
for (i = 0; i < klen; ++i)
if (isLOWER(key[i])) {
xhv = (XPVHV*)SvANY(hv);
if (!xhv->xhv_array) {
- if (lval
+ if (lval
#ifdef DYNAMIC_ENV_FETCH /* if it's an %ENV lookup, we may get it on the fly */
|| (HvNAME(hv) && strEQ(HvNAME(hv),ENV_HV_NAME))
#endif
return 0;
}
+ if (is_utf8 && !(PL_hints & HINT_UTF8_DISTINCT)) {
+ STRLEN tmplen = klen;
+ /* Just casting the &klen to (STRLEN) won't work well
+ * if STRLEN and I32 are of different widths. --jhi */
+ key = (char*)bytes_from_utf8((U8*)key, &tmplen, &is_utf8);
+ klen = tmplen;
+ }
+
PERL_HASH(hash, key, klen);
entry = ((HE**)xhv->xhv_array)[hash & (I32) xhv->xhv_max];
continue;
if (HeKLEN(entry) != klen)
continue;
- if (memNE(HeKEY(entry),key,klen)) /* is this it? */
+ if (HeKEY(entry) != key && memNE(HeKEY(entry),key,klen)) /* is this it? */
continue;
+ if (HeKUTF8(entry) != (char)is_utf8)
+ continue;
+ if (key != keysave)
+ Safefree(key);
return &HeVAL(entry);
}
#ifdef DYNAMIC_ENV_FETCH /* %ENV lookup? If so, try to fetch the value now */
if (env) {
sv = newSVpvn(env,len);
SvTAINTED_on(sv);
+ if (key != keysave)
+ Safefree(key);
return hv_store(hv,key,klen,sv,hash);
}
}
#endif
if (lval) { /* gonna assign to this, so it better be there */
sv = NEWSV(61,0);
- return hv_store(hv,key,klen,sv,hash);
+ if (key != keysave) { /* must be is_utf8 == 0 */
+ SV **ret = hv_store(hv,key,klen,sv,hash);
+ Safefree(key);
+ return ret;
+ }
+ else
+ return hv_store(hv,key,is_utf8?-klen:klen,sv,hash);
}
+ if (key != keysave)
+ Safefree(key);
return 0;
}
/* returns a HE * structure with the all fields set */
/* note that hent_val will be a mortal sv for MAGICAL hashes */
+/*
+=for apidoc hv_fetch_ent
+
+Returns the hash entry which corresponds to the specified key in the hash.
+C<hash> must be a valid precomputed hash number for the given C<key>, or 0
+if you want the function to compute it. IF C<lval> is set then the fetch
+will be part of a store. Make sure the return value is non-null before
+accessing it. The return value when C<tb> is a tied hash is a pointer to a
+static location, so be sure to make a copy of the structure if you need to
+store it somewhere.
+
+See L<perlguts/"Understanding the Magic of Tied Hashes and Arrays"> for more
+information on how to use this function on tied hashes.
+
+=cut
+*/
+
HE *
Perl_hv_fetch_ent(pTHX_ HV *hv, SV *keysv, I32 lval, register U32 hash)
{
STRLEN klen;
register HE *entry;
SV *sv;
+ bool is_utf8;
+ char *keysave;
if (!hv)
return 0;
if (SvRMAGICAL(hv)) {
- if (mg_find((SV*)hv,'P')) {
- dTHR;
+ if (mg_find((SV*)hv, PERL_MAGIC_tied) || SvGMAGICAL((SV*)hv)) {
sv = sv_newmortal();
keysv = sv_2mortal(newSVsv(keysv));
mg_copy((SV*)hv, sv, (char*)keysv, HEf_SVKEY);
return &PL_hv_fetch_ent_mh;
}
#ifdef ENV_IS_CASELESS
- else if (mg_find((SV*)hv,'E')) {
+ else if (mg_find((SV*)hv, PERL_MAGIC_env)) {
U32 i;
key = SvPV(keysv, klen);
for (i = 0; i < klen; ++i)
xhv = (XPVHV*)SvANY(hv);
if (!xhv->xhv_array) {
- if (lval
+ if (lval
#ifdef DYNAMIC_ENV_FETCH /* if it's an %ENV lookup, we may get it on the fly */
|| (HvNAME(hv) && strEQ(HvNAME(hv),ENV_HV_NAME))
#endif
return 0;
}
- key = SvPV(keysv, klen);
-
+ keysave = key = SvPV(keysv, klen);
+ is_utf8 = (SvUTF8(keysv)!=0);
+
+ if (is_utf8 && !(PL_hints & HINT_UTF8_DISTINCT))
+ key = (char*)bytes_from_utf8((U8*)key, &klen, &is_utf8);
+
if (!hash)
PERL_HASH(hash, key, klen);
continue;
if (HeKLEN(entry) != klen)
continue;
- if (memNE(HeKEY(entry),key,klen)) /* is this it? */
+ if (HeKEY(entry) != key && memNE(HeKEY(entry),key,klen)) /* is this it? */
continue;
+ if (HeKUTF8(entry) != (char)is_utf8)
+ continue;
+ if (key != keysave)
+ Safefree(key);
return entry;
}
#ifdef DYNAMIC_ENV_FETCH /* %ENV lookup? If so, try to fetch the value now */
}
}
#endif
+ if (key != keysave)
+ Safefree(key);
if (lval) { /* gonna assign to this, so it better be there */
sv = NEWSV(61,0);
return hv_store_ent(hv,keysv,sv,hash);
if (isUPPER(mg->mg_type)) {
*needs_copy = TRUE;
switch (mg->mg_type) {
- case 'P':
- case 'S':
+ case PERL_MAGIC_tied:
+ case PERL_MAGIC_sig:
*needs_store = FALSE;
}
}
}
}
+/*
+=for apidoc hv_store
+
+Stores an SV in a hash. The hash key is specified as C<key> and C<klen> is
+the length of the key. The C<hash> parameter is the precomputed hash
+value; if it is zero then Perl will compute it. The return value will be
+NULL if the operation failed or if the value did not need to be actually
+stored within the hash (as in the case of tied hashes). Otherwise it can
+be dereferenced to get the original C<SV*>. Note that the caller is
+responsible for suitably incrementing the reference count of C<val> before
+the call, and decrementing it if the function returned NULL.
+
+See L<perlguts/"Understanding the Magic of Tied Hashes and Arrays"> for more
+information on how to use this function on tied hashes.
+
+=cut
+*/
+
SV**
-Perl_hv_store(pTHX_ HV *hv, const char *key, U32 klen, SV *val, register U32 hash)
+Perl_hv_store(pTHX_ HV *hv, const char *key, I32 klen, SV *val, register U32 hash)
{
register XPVHV* xhv;
register I32 i;
register HE *entry;
register HE **oentry;
+ bool is_utf8 = FALSE;
+ const char *keysave = key;
if (!hv)
return 0;
+ if (klen < 0) {
+ klen = -klen;
+ is_utf8 = TRUE;
+ }
+
xhv = (XPVHV*)SvANY(hv);
if (SvMAGICAL(hv)) {
bool needs_copy;
if (!xhv->xhv_array && !needs_store)
return 0;
#ifdef ENV_IS_CASELESS
- else if (mg_find((SV*)hv,'E')) {
- SV *sv = sv_2mortal(newSVpvn(key,klen));
- key = strupr(SvPVX(sv));
+ else if (mg_find((SV*)hv, PERL_MAGIC_env)) {
+ key = savepvn(key,klen);
+ key = strupr(key);
hash = 0;
}
#endif
}
}
+ if (is_utf8 && !(PL_hints & HINT_UTF8_DISTINCT)) {
+ STRLEN tmplen = klen;
+ /* See the note in hv_fetch(). --jhi */
+ key = (char*)bytes_from_utf8((U8*)key, &tmplen, &is_utf8);
+ klen = tmplen;
+ }
+
if (!hash)
PERL_HASH(hash, key, klen);
continue;
if (HeKLEN(entry) != klen)
continue;
- if (memNE(HeKEY(entry),key,klen)) /* is this it? */
+ if (HeKEY(entry) != key && memNE(HeKEY(entry),key,klen)) /* is this it? */
+ continue;
+ if (HeKUTF8(entry) != (char)is_utf8)
continue;
SvREFCNT_dec(HeVAL(entry));
HeVAL(entry) = val;
+ if (key != keysave)
+ Safefree(key);
return &HeVAL(entry);
}
- entry = new_he();
+ entry = new_HE();
if (HvSHAREKEYS(hv))
- HeKEY_hek(entry) = share_hek(key, klen, hash);
+ HeKEY_hek(entry) = share_hek(key, is_utf8?-klen:klen, hash);
else /* gotta do the real thing */
- HeKEY_hek(entry) = save_hek(key, klen, hash);
+ HeKEY_hek(entry) = save_hek(key, is_utf8?-klen:klen, hash);
+ if (key != keysave)
+ Safefree(key);
HeVAL(entry) = val;
HeNEXT(entry) = *oentry;
*oentry = entry;
return &HeVAL(entry);
}
+/*
+=for apidoc hv_store_ent
+
+Stores C<val> in a hash. The hash key is specified as C<key>. The C<hash>
+parameter is the precomputed hash value; if it is zero then Perl will
+compute it. The return value is the new hash entry so created. It will be
+NULL if the operation failed or if the value did not need to be actually
+stored within the hash (as in the case of tied hashes). Otherwise the
+contents of the return value can be accessed using the C<He?> macros
+described here. Note that the caller is responsible for suitably
+incrementing the reference count of C<val> before the call, and
+decrementing it if the function returned NULL.
+
+See L<perlguts/"Understanding the Magic of Tied Hashes and Arrays"> for more
+information on how to use this function on tied hashes.
+
+=cut
+*/
+
HE *
Perl_hv_store_ent(pTHX_ HV *hv, SV *keysv, SV *val, register U32 hash)
{
register I32 i;
register HE *entry;
register HE **oentry;
+ bool is_utf8;
+ char *keysave;
if (!hv)
return 0;
xhv = (XPVHV*)SvANY(hv);
if (SvMAGICAL(hv)) {
- dTHR;
bool needs_copy;
bool needs_store;
hv_magic_check (hv, &needs_copy, &needs_store);
if (!xhv->xhv_array && !needs_store)
return Nullhe;
#ifdef ENV_IS_CASELESS
- else if (mg_find((SV*)hv,'E')) {
+ else if (mg_find((SV*)hv, PERL_MAGIC_env)) {
key = SvPV(keysv, klen);
keysv = sv_2mortal(newSVpvn(key,klen));
(void)strupr(SvPVX(keysv));
}
}
- key = SvPV(keysv, klen);
+ keysave = key = SvPV(keysv, klen);
+ is_utf8 = (SvUTF8(keysv) != 0);
+
+ if (is_utf8 && !(PL_hints & HINT_UTF8_DISTINCT))
+ key = (char*)bytes_from_utf8((U8*)key, &klen, &is_utf8);
if (!hash)
PERL_HASH(hash, key, klen);
continue;
if (HeKLEN(entry) != klen)
continue;
- if (memNE(HeKEY(entry),key,klen)) /* is this it? */
+ if (HeKEY(entry) != key && memNE(HeKEY(entry),key,klen)) /* is this it? */
+ continue;
+ if (HeKUTF8(entry) != (char)is_utf8)
continue;
SvREFCNT_dec(HeVAL(entry));
HeVAL(entry) = val;
+ if (key != keysave)
+ Safefree(key);
return entry;
}
- entry = new_he();
+ entry = new_HE();
if (HvSHAREKEYS(hv))
- HeKEY_hek(entry) = share_hek(key, klen, hash);
+ HeKEY_hek(entry) = share_hek(key, is_utf8?-klen:klen, hash);
else /* gotta do the real thing */
- HeKEY_hek(entry) = save_hek(key, klen, hash);
+ HeKEY_hek(entry) = save_hek(key, is_utf8?-klen:klen, hash);
+ if (key != keysave)
+ Safefree(key);
HeVAL(entry) = val;
HeNEXT(entry) = *oentry;
*oentry = entry;
return entry;
}
+/*
+=for apidoc hv_delete
+
+Deletes a key/value pair in the hash. The value SV is removed from the
+hash and returned to the caller. The C<klen> is the length of the key.
+The C<flags> value will normally be zero; if set to G_DISCARD then NULL
+will be returned.
+
+=cut
+*/
+
SV *
-Perl_hv_delete(pTHX_ HV *hv, const char *key, U32 klen, I32 flags)
+Perl_hv_delete(pTHX_ HV *hv, const char *key, I32 klen, I32 flags)
{
register XPVHV* xhv;
register I32 i;
register HE **oentry;
SV **svp;
SV *sv;
+ bool is_utf8 = FALSE;
+ const char *keysave = key;
if (!hv)
return Nullsv;
+ if (klen < 0) {
+ klen = -klen;
+ is_utf8 = TRUE;
+ }
if (SvRMAGICAL(hv)) {
bool needs_copy;
bool needs_store;
sv = *svp;
mg_clear(sv);
if (!needs_store) {
- if (mg_find(sv, 'p')) {
- sv_unmagic(sv, 'p'); /* No longer an element */
+ if (mg_find(sv, PERL_MAGIC_tiedelem)) {
+ /* No longer an element */
+ sv_unmagic(sv, PERL_MAGIC_tiedelem);
return sv;
}
return Nullsv; /* element cannot be deleted */
}
#ifdef ENV_IS_CASELESS
- else if (mg_find((SV*)hv,'E')) {
+ else if (mg_find((SV*)hv, PERL_MAGIC_env)) {
sv = sv_2mortal(newSVpvn(key,klen));
key = strupr(SvPVX(sv));
}
if (!xhv->xhv_array)
return Nullsv;
+ if (is_utf8 && !(PL_hints & HINT_UTF8_DISTINCT)) {
+ STRLEN tmplen = klen;
+ /* See the note in hv_fetch(). --jhi */
+ key = (char*)bytes_from_utf8((U8*)key, &tmplen, &is_utf8);
+ klen = tmplen;
+ }
+
PERL_HASH(hash, key, klen);
oentry = &((HE**)xhv->xhv_array)[hash & (I32) xhv->xhv_max];
continue;
if (HeKLEN(entry) != klen)
continue;
- if (memNE(HeKEY(entry),key,klen)) /* is this it? */
+ if (HeKEY(entry) != key && memNE(HeKEY(entry),key,klen)) /* is this it? */
continue;
+ if (HeKUTF8(entry) != (char)is_utf8)
+ continue;
+ if (key != keysave)
+ Safefree(key);
*oentry = HeNEXT(entry);
if (i && !*oentry)
xhv->xhv_fill--;
if (flags & G_DISCARD)
sv = Nullsv;
- else
- sv = sv_mortalcopy(HeVAL(entry));
+ else {
+ sv = sv_2mortal(HeVAL(entry));
+ HeVAL(entry) = &PL_sv_undef;
+ }
if (entry == xhv->xhv_eiter)
HvLAZYDEL_on(hv);
else
--xhv->xhv_keys;
return sv;
}
+ if (key != keysave)
+ Safefree(key);
return Nullsv;
}
+/*
+=for apidoc hv_delete_ent
+
+Deletes a key/value pair in the hash. The value SV is removed from the
+hash and returned to the caller. The C<flags> value will normally be zero;
+if set to G_DISCARD then NULL will be returned. C<hash> can be a valid
+precomputed hash value, or 0 to ask for it to be computed.
+
+=cut
+*/
+
SV *
Perl_hv_delete_ent(pTHX_ HV *hv, SV *keysv, I32 flags, U32 hash)
{
register HE *entry;
register HE **oentry;
SV *sv;
-
+ bool is_utf8;
+ char *keysave;
+
if (!hv)
return Nullsv;
if (SvRMAGICAL(hv)) {
sv = HeVAL(entry);
mg_clear(sv);
if (!needs_store) {
- if (mg_find(sv, 'p')) {
- sv_unmagic(sv, 'p'); /* No longer an element */
+ if (mg_find(sv, PERL_MAGIC_tiedelem)) {
+ /* No longer an element */
+ sv_unmagic(sv, PERL_MAGIC_tiedelem);
return sv;
}
return Nullsv; /* element cannot be deleted */
}
#ifdef ENV_IS_CASELESS
- else if (mg_find((SV*)hv,'E')) {
+ else if (mg_find((SV*)hv, PERL_MAGIC_env)) {
key = SvPV(keysv, klen);
keysv = sv_2mortal(newSVpvn(key,klen));
(void)strupr(SvPVX(keysv));
- hash = 0;
+ hash = 0;
}
#endif
}
if (!xhv->xhv_array)
return Nullsv;
- key = SvPV(keysv, klen);
-
+ keysave = key = SvPV(keysv, klen);
+ is_utf8 = (SvUTF8(keysv) != 0);
+
+ if (is_utf8 && !(PL_hints & HINT_UTF8_DISTINCT))
+ key = (char*)bytes_from_utf8((U8*)key, &klen, &is_utf8);
+
if (!hash)
PERL_HASH(hash, key, klen);
continue;
if (HeKLEN(entry) != klen)
continue;
- if (memNE(HeKEY(entry),key,klen)) /* is this it? */
+ if (HeKEY(entry) != key && memNE(HeKEY(entry),key,klen)) /* is this it? */
continue;
+ if (HeKUTF8(entry) != (char)is_utf8)
+ continue;
+ if (key != keysave)
+ Safefree(key);
*oentry = HeNEXT(entry);
if (i && !*oentry)
xhv->xhv_fill--;
if (flags & G_DISCARD)
sv = Nullsv;
- else
- sv = sv_mortalcopy(HeVAL(entry));
+ else {
+ sv = sv_2mortal(HeVAL(entry));
+ HeVAL(entry) = &PL_sv_undef;
+ }
if (entry == xhv->xhv_eiter)
HvLAZYDEL_on(hv);
else
--xhv->xhv_keys;
return sv;
}
+ if (key != keysave)
+ Safefree(key);
return Nullsv;
}
+/*
+=for apidoc hv_exists
+
+Returns a boolean indicating whether the specified hash key exists. The
+C<klen> is the length of the key.
+
+=cut
+*/
+
bool
-Perl_hv_exists(pTHX_ HV *hv, const char *key, U32 klen)
+Perl_hv_exists(pTHX_ HV *hv, const char *key, I32 klen)
{
register XPVHV* xhv;
register U32 hash;
register HE *entry;
SV *sv;
+ bool is_utf8 = FALSE;
+ const char *keysave = key;
if (!hv)
return 0;
+ if (klen < 0) {
+ klen = -klen;
+ is_utf8 = TRUE;
+ }
+
if (SvRMAGICAL(hv)) {
- if (mg_find((SV*)hv,'P')) {
- dTHR;
+ if (mg_find((SV*)hv, PERL_MAGIC_tied) || SvGMAGICAL((SV*)hv)) {
sv = sv_newmortal();
- mg_copy((SV*)hv, sv, key, klen);
- magic_existspack(sv, mg_find(sv, 'p'));
+ mg_copy((SV*)hv, sv, key, klen);
+ magic_existspack(sv, mg_find(sv, PERL_MAGIC_tiedelem));
return SvTRUE(sv);
}
#ifdef ENV_IS_CASELESS
- else if (mg_find((SV*)hv,'E')) {
+ else if (mg_find((SV*)hv, PERL_MAGIC_env)) {
sv = sv_2mortal(newSVpvn(key,klen));
key = strupr(SvPVX(sv));
}
xhv = (XPVHV*)SvANY(hv);
#ifndef DYNAMIC_ENV_FETCH
if (!xhv->xhv_array)
- return 0;
+ return 0;
#endif
+ if (is_utf8 && !(PL_hints & HINT_UTF8_DISTINCT)) {
+ STRLEN tmplen = klen;
+ /* See the note in hv_fetch(). --jhi */
+ key = (char*)bytes_from_utf8((U8*)key, &tmplen, &is_utf8);
+ klen = tmplen;
+ }
+
PERL_HASH(hash, key, klen);
#ifdef DYNAMIC_ENV_FETCH
continue;
if (HeKLEN(entry) != klen)
continue;
- if (memNE(HeKEY(entry),key,klen)) /* is this it? */
+ if (HeKEY(entry) != key && memNE(HeKEY(entry),key,klen)) /* is this it? */
continue;
+ if (HeKUTF8(entry) != (char)is_utf8)
+ continue;
+ if (key != keysave)
+ Safefree(key);
return TRUE;
}
#ifdef DYNAMIC_ENV_FETCH /* is it out there? */
}
}
#endif
+ if (key != keysave)
+ Safefree(key);
return FALSE;
}
+/*
+=for apidoc hv_exists_ent
+
+Returns a boolean indicating whether the specified hash key exists. C<hash>
+can be a valid precomputed hash value, or 0 to ask for it to be
+computed.
+
+=cut
+*/
+
bool
Perl_hv_exists_ent(pTHX_ HV *hv, SV *keysv, U32 hash)
{
STRLEN klen;
register HE *entry;
SV *sv;
+ bool is_utf8;
+ char *keysave;
if (!hv)
return 0;
if (SvRMAGICAL(hv)) {
- if (mg_find((SV*)hv,'P')) {
- dTHR; /* just for SvTRUE */
+ if (mg_find((SV*)hv, PERL_MAGIC_tied) || SvGMAGICAL((SV*)hv)) {
+ SV* svret = sv_newmortal();
sv = sv_newmortal();
keysv = sv_2mortal(newSVsv(keysv));
- mg_copy((SV*)hv, sv, (char*)keysv, HEf_SVKEY);
- magic_existspack(sv, mg_find(sv, 'p'));
- return SvTRUE(sv);
+ mg_copy((SV*)hv, sv, (char*)keysv, HEf_SVKEY);
+ magic_existspack(svret, mg_find(sv, PERL_MAGIC_tiedelem));
+ return SvTRUE(svret);
}
#ifdef ENV_IS_CASELESS
- else if (mg_find((SV*)hv,'E')) {
+ else if (mg_find((SV*)hv, PERL_MAGIC_env)) {
key = SvPV(keysv, klen);
keysv = sv_2mortal(newSVpvn(key,klen));
(void)strupr(SvPVX(keysv));
- hash = 0;
+ hash = 0;
}
#endif
}
xhv = (XPVHV*)SvANY(hv);
#ifndef DYNAMIC_ENV_FETCH
if (!xhv->xhv_array)
- return 0;
+ return 0;
#endif
- key = SvPV(keysv, klen);
+ keysave = key = SvPV(keysv, klen);
+ is_utf8 = (SvUTF8(keysv) != 0);
+ if (is_utf8 && !(PL_hints & HINT_UTF8_DISTINCT))
+ key = (char*)bytes_from_utf8((U8*)key, &klen, &is_utf8);
if (!hash)
PERL_HASH(hash, key, klen);
continue;
if (HeKLEN(entry) != klen)
continue;
- if (memNE(HeKEY(entry),key,klen)) /* is this it? */
+ if (HeKEY(entry) != key && memNE(HeKEY(entry),key,klen)) /* is this it? */
+ continue;
+ if (HeKUTF8(entry) != (char)is_utf8)
continue;
+ if (key != keysave)
+ Safefree(key);
return TRUE;
}
#ifdef DYNAMIC_ENV_FETCH /* is it out there? */
}
}
#endif
+ if (key != keysave)
+ Safefree(key);
return FALSE;
}
return;
}
#else
-#define MALLOC_OVERHEAD 16
New(2, a, PERL_HV_ARRAY_ALLOC_BYTES(newsize), char);
if (!a) {
PL_nomemok = FALSE;
}
}
+/*
+=for apidoc newHV
+
+Creates a new HV. The reference count is set to 1.
+
+=cut
+*/
+
HV *
Perl_newHV(pTHX)
{
xhv = (XPVHV*)SvANY(hv);
SvPOK_off(hv);
SvNOK_off(hv);
-#ifndef NODEFAULT_SHAREKEYS
+#ifndef NODEFAULT_SHAREKEYS
HvSHAREKEYS_on(hv); /* key-sharing on by default */
-#endif
+#endif
xhv->xhv_max = 7; /* start with 8 buckets */
xhv->xhv_fill = 0;
xhv->xhv_pmroot = 0;
return hv;
#if 0
- if (! SvTIED_mg((SV*)ohv, 'P')) {
+ if (! SvTIED_mg((SV*)ohv, PERL_MAGIC_tied)) {
/* Quick way ???*/
- }
- else
+ }
+ else
#endif
{
HE *entry;
/* Slow way */
hv_iterinit(ohv);
- while (entry = hv_iternext(ohv)) {
- hv_store(hv, HeKEY(entry), HeKLEN(entry),
- SvREFCNT_inc(HeVAL(entry)), HeHASH(entry));
+ while ((entry = hv_iternext(ohv))) {
+ hv_store(hv, HeKEY(entry), HeKLEN_UTF8(entry),
+ newSVsv(HeVAL(entry)), HeHASH(entry));
}
HvRITER(ohv) = hv_riter;
HvEITER(ohv) = hv_eiter;
}
-
+
return hv;
}
unshare_hek(HeKEY_hek(entry));
else
Safefree(HeKEY_hek(entry));
- del_he(entry);
+ del_HE(entry);
}
void
unshare_hek(HeKEY_hek(entry));
else
Safefree(HeKEY_hek(entry));
- del_he(entry);
+ del_HE(entry);
}
+/*
+=for apidoc hv_clear
+
+Clears a hash, making it empty.
+
+=cut
+*/
+
void
Perl_hv_clear(pTHX_ HV *hv)
{
(void)memzero(xhv->xhv_array, (xhv->xhv_max + 1) * sizeof(HE*));
if (SvRMAGICAL(hv))
- mg_clear((SV*)hv);
+ mg_clear((SV*)hv);
}
STATIC void
if (++riter > max)
break;
entry = array[riter];
- }
+ }
}
(void)hv_iterinit(hv);
}
+/*
+=for apidoc hv_undef
+
+Undefines the hash.
+
+=cut
+*/
+
void
Perl_hv_undef(pTHX_ HV *hv)
{
xhv->xhv_keys = 0;
if (SvRMAGICAL(hv))
- mg_clear((SV*)hv);
+ mg_clear((SV*)hv);
}
+/*
+=for apidoc hv_iterinit
+
+Prepares a starting point to traverse a hash table. Returns the number of
+keys in the hash (i.e. the same as C<HvKEYS(tb)>). The return value is
+currently only meaningful for hashes without tie magic.
+
+NOTE: Before version 5.004_65, C<hv_iterinit> used to return the number of
+hash buckets that happen to be in use. If you still need that esoteric
+value, you can get it through the macro C<HvFILL(tb)>.
+
+=cut
+*/
+
I32
Perl_hv_iterinit(pTHX_ HV *hv)
{
return xhv->xhv_keys; /* used to be xhv->xhv_fill before 5.004_65 */
}
+/*
+=for apidoc hv_iternext
+
+Returns entries from a hash iterator. See C<hv_iterinit>.
+
+=cut
+*/
+
HE *
Perl_hv_iternext(pTHX_ HV *hv)
{
xhv = (XPVHV*)SvANY(hv);
oldentry = entry = xhv->xhv_eiter;
- if (mg = SvTIED_mg((SV*)hv, 'P')) {
+ if ((mg = SvTIED_mg((SV*)hv, PERL_MAGIC_tied))) {
SV *key = sv_newmortal();
if (entry) {
sv_setsv(key, HeSVKEY_force(entry));
char *k;
HEK *hek;
- xhv->xhv_eiter = entry = new_he(); /* one HE per MAGICAL hash */
+ xhv->xhv_eiter = entry = new_HE(); /* one HE per MAGICAL hash */
Zero(entry, 1, HE);
Newz(54, k, HEK_BASESIZE + sizeof(SV*), char);
hek = (HEK*)k;
if (HeVAL(entry))
SvREFCNT_dec(HeVAL(entry));
Safefree(HeKEY_hek(entry));
- del_he(entry);
+ del_HE(entry);
xhv->xhv_eiter = Null(HE*);
return Null(HE*);
}
return entry;
}
+/*
+=for apidoc hv_iterkey
+
+Returns the key from the current position of the hash iterator. See
+C<hv_iterinit>.
+
+=cut
+*/
+
char *
Perl_hv_iterkey(pTHX_ register HE *entry, I32 *retlen)
{
}
/* unlike hv_iterval(), this always returns a mortal copy of the key */
+/*
+=for apidoc hv_iterkeysv
+
+Returns the key as an C<SV*> from the current position of the hash
+iterator. The return value will always be a mortal copy of the key. Also
+see C<hv_iterinit>.
+
+=cut
+*/
+
SV *
Perl_hv_iterkeysv(pTHX_ register HE *entry)
{
if (HeKLEN(entry) == HEf_SVKEY)
return sv_mortalcopy(HeKEY_sv(entry));
else
- return sv_2mortal(newSVpvn((HeKLEN(entry) ? HeKEY(entry) : ""),
- HeKLEN(entry)));
+ return sv_2mortal(newSVpvn_share((HeKLEN(entry) ? HeKEY(entry) : ""),
+ HeKLEN_UTF8(entry), HeHASH(entry)));
}
+/*
+=for apidoc hv_iterval
+
+Returns the value from the current position of the hash iterator. See
+C<hv_iterkey>.
+
+=cut
+*/
+
SV *
Perl_hv_iterval(pTHX_ HV *hv, register HE *entry)
{
if (SvRMAGICAL(hv)) {
- if (mg_find((SV*)hv,'P')) {
+ if (mg_find((SV*)hv, PERL_MAGIC_tied)) {
SV* sv = sv_newmortal();
if (HeKLEN(entry) == HEf_SVKEY)
mg_copy((SV*)hv, sv, (char*)HeKEY_sv(entry), HEf_SVKEY);
return HeVAL(entry);
}
+/*
+=for apidoc hv_iternextsv
+
+Performs an C<hv_iternext>, C<hv_iterkey>, and C<hv_iterval> in one
+operation.
+
+=cut
+*/
+
SV *
Perl_hv_iternextsv(pTHX_ HV *hv, char **key, I32 *retlen)
{
return hv_iterval(hv, he);
}
+/*
+=for apidoc hv_magic
+
+Adds magic to a hash. See C<sv_magic>.
+
+=cut
+*/
+
void
Perl_hv_magic(pTHX_ HV *hv, GV *gv, int how)
{
register HE **oentry;
register I32 i = 1;
I32 found = 0;
-
+ bool is_utf8 = FALSE;
+ const char *save = str;
+
+ if (len < 0) {
+ len = -len;
+ is_utf8 = TRUE;
+ if (!(PL_hints & HINT_UTF8_DISTINCT)) {
+ STRLEN tmplen = len;
+ /* See the note in hv_fetch(). --jhi */
+ str = (char*)bytes_from_utf8((U8*)str, &tmplen, &is_utf8);
+ len = tmplen;
+ }
+ }
+
/* what follows is the moral equivalent of:
if ((Svp = hv_fetch(PL_strtab, tmpsv, FALSE, hash))) {
if (--*Svp == Nullsv)
continue;
if (HeKLEN(entry) != len)
continue;
- if (memNE(HeKEY(entry),str,len)) /* is this it? */
+ if (HeKEY(entry) != str && memNE(HeKEY(entry),str,len)) /* is this it? */
+ continue;
+ if (HeKUTF8(entry) != (char)is_utf8)
continue;
found = 1;
if (--HeVAL(entry) == Nullsv) {
if (i && !*oentry)
xhv->xhv_fill--;
Safefree(HeKEY_hek(entry));
- del_he(entry);
+ del_HE(entry);
--xhv->xhv_keys;
}
break;
}
UNLOCK_STRTAB_MUTEX;
-
- {
- dTHR;
- if (!found && ckWARN_d(WARN_INTERNAL))
- Perl_warner(aTHX_ WARN_INTERNAL, "Attempt to free non-existent shared string");
- }
+ if (str != save)
+ Safefree(str);
+ if (!found && ckWARN_d(WARN_INTERNAL))
+ Perl_warner(aTHX_ WARN_INTERNAL, "Attempt to free non-existent shared string '%s'",str);
}
/* get a (constant) string ptr from the global string table
register HE **oentry;
register I32 i = 1;
I32 found = 0;
+ bool is_utf8 = FALSE;
+ const char *save = str;
+
+ if (len < 0) {
+ len = -len;
+ is_utf8 = TRUE;
+ if (!(PL_hints & HINT_UTF8_DISTINCT)) {
+ STRLEN tmplen = len;
+ /* See the note in hv_fetch(). --jhi */
+ str = (char*)bytes_from_utf8((U8*)str, &tmplen, &is_utf8);
+ len = tmplen;
+ }
+ }
/* what follows is the moral equivalent of:
-
+
if (!(Svp = hv_fetch(PL_strtab, str, len, FALSE)))
hv_store(PL_strtab, str, len, Nullsv, hash);
*/
continue;
if (HeKLEN(entry) != len)
continue;
- if (memNE(HeKEY(entry),str,len)) /* is this it? */
+ if (HeKEY(entry) != str && memNE(HeKEY(entry),str,len)) /* is this it? */
+ continue;
+ if (HeKUTF8(entry) != (char)is_utf8)
continue;
found = 1;
break;
}
if (!found) {
- entry = new_he();
- HeKEY_hek(entry) = save_hek(str, len, hash);
+ entry = new_HE();
+ HeKEY_hek(entry) = save_hek(str, is_utf8?-len:len, hash);
HeVAL(entry) = Nullsv;
HeNEXT(entry) = *oentry;
*oentry = entry;
++HeVAL(entry); /* use value slot as REFCNT */
UNLOCK_STRTAB_MUTEX;
+ if (str != save)
+ Safefree(str);
return HeKEY_hek(entry);
}
-
-
-
https://perl5.git.perl.org / perl5.git / blobdiff