/* hv.c
*
- * Copyright (c) 1991-1994, Larry Wall
+ * Copyright (c) 1991-1999, 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.
*/
#include "EXTERN.h"
+#define PERL_IN_HV_C
#include "perl.h"
-static void hsplit _((HV *hv));
-static void hfreeentries _((HV *hv));
+#if defined(STRANGE_MALLOC) || defined(MYMALLOC)
+# define ARRAY_ALLOC_BYTES(size) ( (size)*sizeof(HE*) )
+#else
+# define MALLOC_OVERHEAD 16
+# define ARRAY_ALLOC_BYTES(size) ( ((size) < 64) \
+ ? (size)*sizeof(HE*) \
+ : (size)*sizeof(HE*)*2 - MALLOC_OVERHEAD )
+#endif
+
+STATIC HE*
+S_new_he(pTHX)
+{
+ HE* he;
+ LOCK_SV_MUTEX;
+ if (!PL_he_root)
+ more_he();
+ he = PL_he_root;
+ PL_he_root = HeNEXT(he);
+ UNLOCK_SV_MUTEX;
+ return he;
+}
+
+STATIC void
+S_del_he(pTHX_ HE *p)
+{
+ LOCK_SV_MUTEX;
+ HeNEXT(p) = (HE*)PL_he_root;
+ PL_he_root = p;
+ UNLOCK_SV_MUTEX;
+}
+
+STATIC void
+S_more_he(pTHX)
+{
+ register HE* he;
+ register HE* heend;
+ New(54, PL_he_root, 1008/sizeof(HE), HE);
+ he = PL_he_root;
+ heend = &he[1008 / sizeof(HE) - 1];
+ while (he < heend) {
+ HeNEXT(he) = (HE*)(he + 1);
+ he++;
+ }
+ HeNEXT(he) = 0;
+}
+
+STATIC HEK *
+S_save_hek(pTHX_ const char *str, I32 len, U32 hash)
+{
+ char *k;
+ register HEK *hek;
+
+ 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;
+ return hek;
+}
+
+void
+Perl_unshare_hek(pTHX_ HEK *hek)
+{
+ unsharepvn(HEK_KEY(hek),HEK_LEN(hek),HEK_HASH(hek));
+}
+
+/* (klen == HEf_SVKEY) is special for MAGICAL hv entries, meaning key slot
+ * contains an SV* */
SV**
-hv_fetch(hv,key,klen,lval)
-HV *hv;
-char *key;
-U32 klen;
-I32 lval;
+Perl_hv_fetch(pTHX_ HV *hv, const char *key, U32 klen, I32 lval)
{
register XPVHV* xhv;
- register char *s;
- register I32 i;
- register I32 hash;
+ register U32 hash;
register HE *entry;
SV *sv;
if (SvRMAGICAL(hv)) {
if (mg_find((SV*)hv,'P')) {
+ dTHR;
sv = sv_newmortal();
mg_copy((SV*)hv, sv, key, klen);
- Sv = sv;
- return &Sv;
+ PL_hv_fetch_sv = sv;
+ return &PL_hv_fetch_sv;
}
+#ifdef ENV_IS_CASELESS
+ else if (mg_find((SV*)hv,'E')) {
+ U32 i;
+ for (i = 0; i < klen; ++i)
+ if (isLOWER(key[i])) {
+ char *nkey = strupr(SvPVX(sv_2mortal(newSVpvn(key,klen))));
+ SV **ret = hv_fetch(hv, nkey, klen, 0);
+ if (!ret && lval)
+ ret = hv_store(hv, key, klen, NEWSV(61,0), 0);
+ return ret;
+ }
+ }
+#endif
}
xhv = (XPVHV*)SvANY(hv);
|| (HvNAME(hv) && strEQ(HvNAME(hv),ENV_HV_NAME))
#endif
)
- Newz(503,xhv->xhv_array, sizeof(HE*) * (xhv->xhv_max + 1), char);
+ Newz(503,xhv->xhv_array, ARRAY_ALLOC_BYTES(xhv->xhv_max + 1), char);
else
return 0;
}
- i = klen;
- hash = 0;
- s = key;
- while (i--)
- hash = hash * 33 + *s++;
+ PERL_HASH(hash, key, klen);
entry = ((HE**)xhv->xhv_array)[hash & (I32) xhv->xhv_max];
- for (; entry; entry = entry->hent_next) {
- if (entry->hent_hash != hash) /* strings can't be equal */
+ for (; entry; entry = HeNEXT(entry)) {
+ if (HeHASH(entry) != hash) /* strings can't be equal */
continue;
- if (entry->hent_klen != klen)
+ if (HeKLEN(entry) != klen)
continue;
- if (bcmp(entry->hent_key,key,klen)) /* is this it? */
+ if (memNE(HeKEY(entry),key,klen)) /* is this it? */
continue;
- return &entry->hent_val;
+ return &HeVAL(entry);
}
#ifdef DYNAMIC_ENV_FETCH /* %ENV lookup? If so, try to fetch the value now */
if (HvNAME(hv) && strEQ(HvNAME(hv),ENV_HV_NAME)) {
- char *gotenv;
-
- gotenv = my_getenv(key);
- if (gotenv != NULL) {
- sv = newSVpv(gotenv,strlen(gotenv));
- return hv_store(hv,key,klen,sv,hash);
- }
+ unsigned long len;
+ char *env = PerlEnv_ENVgetenv_len(key,&len);
+ if (env) {
+ sv = newSVpvn(env,len);
+ SvTAINTED_on(sv);
+ return hv_store(hv,key,klen,sv,hash);
+ }
}
#endif
if (lval) { /* gonna assign to this, so it better be there */
return 0;
}
+/* returns a HE * structure with the all fields set */
+/* note that hent_val will be a mortal sv for MAGICAL hashes */
+HE *
+Perl_hv_fetch_ent(pTHX_ HV *hv, SV *keysv, I32 lval, register U32 hash)
+{
+ register XPVHV* xhv;
+ register char *key;
+ STRLEN klen;
+ register HE *entry;
+ SV *sv;
+
+ if (!hv)
+ return 0;
+
+ if (SvRMAGICAL(hv)) {
+ if (mg_find((SV*)hv,'P')) {
+ dTHR;
+ sv = sv_newmortal();
+ keysv = sv_2mortal(newSVsv(keysv));
+ mg_copy((SV*)hv, sv, (char*)keysv, HEf_SVKEY);
+ if (!HeKEY_hek(&PL_hv_fetch_ent_mh)) {
+ char *k;
+ New(54, k, HEK_BASESIZE + sizeof(SV*), char);
+ HeKEY_hek(&PL_hv_fetch_ent_mh) = (HEK*)k;
+ }
+ HeSVKEY_set(&PL_hv_fetch_ent_mh, keysv);
+ HeVAL(&PL_hv_fetch_ent_mh) = sv;
+ return &PL_hv_fetch_ent_mh;
+ }
+#ifdef ENV_IS_CASELESS
+ else if (mg_find((SV*)hv,'E')) {
+ U32 i;
+ key = SvPV(keysv, klen);
+ for (i = 0; i < klen; ++i)
+ if (isLOWER(key[i])) {
+ SV *nkeysv = sv_2mortal(newSVpvn(key,klen));
+ (void)strupr(SvPVX(nkeysv));
+ entry = hv_fetch_ent(hv, nkeysv, 0, 0);
+ if (!entry && lval)
+ entry = hv_store_ent(hv, keysv, NEWSV(61,0), hash);
+ return entry;
+ }
+ }
+#endif
+ }
+
+ xhv = (XPVHV*)SvANY(hv);
+ if (!xhv->xhv_array) {
+ 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
+ )
+ Newz(503,xhv->xhv_array, ARRAY_ALLOC_BYTES(xhv->xhv_max + 1), char);
+ else
+ return 0;
+ }
+
+ key = SvPV(keysv, klen);
+
+ if (!hash)
+ PERL_HASH(hash, key, klen);
+
+ entry = ((HE**)xhv->xhv_array)[hash & (I32) xhv->xhv_max];
+ for (; entry; entry = HeNEXT(entry)) {
+ if (HeHASH(entry) != hash) /* strings can't be equal */
+ continue;
+ if (HeKLEN(entry) != klen)
+ continue;
+ if (memNE(HeKEY(entry),key,klen)) /* is this it? */
+ continue;
+ return entry;
+ }
+#ifdef DYNAMIC_ENV_FETCH /* %ENV lookup? If so, try to fetch the value now */
+ if (HvNAME(hv) && strEQ(HvNAME(hv),ENV_HV_NAME)) {
+ unsigned long len;
+ char *env = PerlEnv_ENVgetenv_len(key,&len);
+ if (env) {
+ sv = newSVpvn(env,len);
+ SvTAINTED_on(sv);
+ return hv_store_ent(hv,keysv,sv,hash);
+ }
+ }
+#endif
+ if (lval) { /* gonna assign to this, so it better be there */
+ sv = NEWSV(61,0);
+ return hv_store_ent(hv,keysv,sv,hash);
+ }
+ return 0;
+}
+
+STATIC void
+S_hv_magic_check(pTHX_ HV *hv, bool *needs_copy, bool *needs_store)
+{
+ MAGIC *mg = SvMAGIC(hv);
+ *needs_copy = FALSE;
+ *needs_store = TRUE;
+ while (mg) {
+ if (isUPPER(mg->mg_type)) {
+ *needs_copy = TRUE;
+ switch (mg->mg_type) {
+ case 'P':
+ case 'S':
+ *needs_store = FALSE;
+ }
+ }
+ mg = mg->mg_moremagic;
+ }
+}
+
SV**
-hv_store(hv,key,klen,val,hash)
-HV *hv;
-char *key;
-U32 klen;
-SV *val;
-register U32 hash;
+Perl_hv_store(pTHX_ HV *hv, const char *key, U32 klen, SV *val, register U32 hash)
{
register XPVHV* xhv;
- register char *s;
register I32 i;
register HE *entry;
register HE **oentry;
xhv = (XPVHV*)SvANY(hv);
if (SvMAGICAL(hv)) {
- mg_copy((SV*)hv, val, key, klen);
-#ifndef OVERLOAD
- if (!xhv->xhv_array)
- return 0;
-#else
- if (!xhv->xhv_array && (SvMAGIC(hv)->mg_type != 'A'
- || SvMAGIC(hv)->mg_moremagic))
- return 0;
-#endif /* OVERLOAD */
+ bool needs_copy;
+ bool needs_store;
+ hv_magic_check (hv, &needs_copy, &needs_store);
+ if (needs_copy) {
+ mg_copy((SV*)hv, val, key, klen);
+ 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));
+ hash = 0;
+ }
+#endif
+ }
}
- if (!hash) {
- i = klen;
- s = key;
- while (i--)
- hash = hash * 33 + *s++;
+ if (!hash)
+ PERL_HASH(hash, key, klen);
+
+ if (!xhv->xhv_array)
+ Newz(505, xhv->xhv_array, ARRAY_ALLOC_BYTES(xhv->xhv_max + 1), char);
+
+ oentry = &((HE**)xhv->xhv_array)[hash & (I32) xhv->xhv_max];
+ i = 1;
+
+ for (entry = *oentry; entry; i=0, entry = HeNEXT(entry)) {
+ if (HeHASH(entry) != hash) /* strings can't be equal */
+ continue;
+ if (HeKLEN(entry) != klen)
+ continue;
+ if (memNE(HeKEY(entry),key,klen)) /* is this it? */
+ continue;
+ SvREFCNT_dec(HeVAL(entry));
+ HeVAL(entry) = val;
+ return &HeVAL(entry);
+ }
+
+ entry = new_he();
+ if (HvSHAREKEYS(hv))
+ HeKEY_hek(entry) = share_hek(key, klen, hash);
+ else /* gotta do the real thing */
+ HeKEY_hek(entry) = save_hek(key, klen, hash);
+ HeVAL(entry) = val;
+ HeNEXT(entry) = *oentry;
+ *oentry = entry;
+
+ xhv->xhv_keys++;
+ if (i) { /* initial entry? */
+ ++xhv->xhv_fill;
+ if (xhv->xhv_keys > xhv->xhv_max)
+ hsplit(hv);
+ }
+
+ return &HeVAL(entry);
+}
+
+HE *
+Perl_hv_store_ent(pTHX_ HV *hv, SV *keysv, SV *val, register U32 hash)
+{
+ register XPVHV* xhv;
+ register char *key;
+ STRLEN klen;
+ register I32 i;
+ register HE *entry;
+ register HE **oentry;
+
+ 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 (needs_copy) {
+ bool save_taint = PL_tainted;
+ if (PL_tainting)
+ PL_tainted = SvTAINTED(keysv);
+ keysv = sv_2mortal(newSVsv(keysv));
+ mg_copy((SV*)hv, val, (char*)keysv, HEf_SVKEY);
+ TAINT_IF(save_taint);
+ if (!xhv->xhv_array && !needs_store)
+ return Nullhe;
+#ifdef ENV_IS_CASELESS
+ else if (mg_find((SV*)hv,'E')) {
+ key = SvPV(keysv, klen);
+ keysv = sv_2mortal(newSVpvn(key,klen));
+ (void)strupr(SvPVX(keysv));
+ hash = 0;
+ }
+#endif
+ }
}
+ key = SvPV(keysv, klen);
+
+ if (!hash)
+ PERL_HASH(hash, key, klen);
+
if (!xhv->xhv_array)
- Newz(505, xhv->xhv_array, sizeof(HE**) * (xhv->xhv_max + 1), char);
+ Newz(505, xhv->xhv_array, ARRAY_ALLOC_BYTES(xhv->xhv_max + 1), char);
oentry = &((HE**)xhv->xhv_array)[hash & (I32) xhv->xhv_max];
i = 1;
- for (entry = *oentry; entry; i=0, entry = entry->hent_next) {
- if (entry->hent_hash != hash) /* strings can't be equal */
+ for (entry = *oentry; entry; i=0, entry = HeNEXT(entry)) {
+ if (HeHASH(entry) != hash) /* strings can't be equal */
continue;
- if (entry->hent_klen != klen)
+ if (HeKLEN(entry) != klen)
continue;
- if (bcmp(entry->hent_key,key,klen)) /* is this it? */
+ if (memNE(HeKEY(entry),key,klen)) /* is this it? */
continue;
- SvREFCNT_dec(entry->hent_val);
- entry->hent_val = val;
- return &entry->hent_val;
+ SvREFCNT_dec(HeVAL(entry));
+ HeVAL(entry) = val;
+ return entry;
}
- New(501,entry, 1, HE);
- entry->hent_klen = klen;
- entry->hent_key = savepvn(key,klen);
- entry->hent_val = val;
- entry->hent_hash = hash;
- entry->hent_next = *oentry;
+ entry = new_he();
+ if (HvSHAREKEYS(hv))
+ HeKEY_hek(entry) = share_hek(key, klen, hash);
+ else /* gotta do the real thing */
+ HeKEY_hek(entry) = save_hek(key, klen, hash);
+ HeVAL(entry) = val;
+ HeNEXT(entry) = *oentry;
*oentry = entry;
xhv->xhv_keys++;
hsplit(hv);
}
- return &entry->hent_val;
+ return entry;
}
SV *
-hv_delete(hv,key,klen,flags)
-HV *hv;
-char *key;
-U32 klen;
-I32 flags;
+Perl_hv_delete(pTHX_ HV *hv, const char *key, U32 klen, I32 flags)
{
register XPVHV* xhv;
- register char *s;
register I32 i;
- register I32 hash;
+ register U32 hash;
register HE *entry;
register HE **oentry;
+ SV **svp;
SV *sv;
if (!hv)
return Nullsv;
if (SvRMAGICAL(hv)) {
- sv = *hv_fetch(hv, key, klen, TRUE);
- mg_clear(sv);
- if (mg_find(sv, 'p')) {
- sv_unmagic(sv, 'p'); /* No longer an element */
- return sv;
+ bool needs_copy;
+ bool needs_store;
+ hv_magic_check (hv, &needs_copy, &needs_store);
+
+ if (needs_copy && (svp = hv_fetch(hv, key, klen, TRUE))) {
+ sv = *svp;
+ mg_clear(sv);
+ if (!needs_store) {
+ if (mg_find(sv, 'p')) {
+ sv_unmagic(sv, 'p'); /* No longer an element */
+ return sv;
+ }
+ return Nullsv; /* element cannot be deleted */
+ }
+#ifdef ENV_IS_CASELESS
+ else if (mg_find((SV*)hv,'E')) {
+ sv = sv_2mortal(newSVpvn(key,klen));
+ key = strupr(SvPVX(sv));
+ }
+#endif
+ }
+ }
+ xhv = (XPVHV*)SvANY(hv);
+ if (!xhv->xhv_array)
+ return Nullsv;
+
+ PERL_HASH(hash, key, klen);
+
+ oentry = &((HE**)xhv->xhv_array)[hash & (I32) xhv->xhv_max];
+ entry = *oentry;
+ i = 1;
+ for (; entry; i=0, oentry = &HeNEXT(entry), entry = *oentry) {
+ if (HeHASH(entry) != hash) /* strings can't be equal */
+ continue;
+ if (HeKLEN(entry) != klen)
+ continue;
+ if (memNE(HeKEY(entry),key,klen)) /* is this it? */
+ continue;
+ *oentry = HeNEXT(entry);
+ if (i && !*oentry)
+ xhv->xhv_fill--;
+ if (flags & G_DISCARD)
+ sv = Nullsv;
+ else
+ sv = sv_mortalcopy(HeVAL(entry));
+ if (entry == xhv->xhv_eiter)
+ HvLAZYDEL_on(hv);
+ else
+ hv_free_ent(hv, entry);
+ --xhv->xhv_keys;
+ return sv;
+ }
+ return Nullsv;
+}
+
+SV *
+Perl_hv_delete_ent(pTHX_ HV *hv, SV *keysv, I32 flags, U32 hash)
+{
+ register XPVHV* xhv;
+ register I32 i;
+ register char *key;
+ STRLEN klen;
+ register HE *entry;
+ register HE **oentry;
+ SV *sv;
+
+ if (!hv)
+ return Nullsv;
+ if (SvRMAGICAL(hv)) {
+ bool needs_copy;
+ bool needs_store;
+ hv_magic_check (hv, &needs_copy, &needs_store);
+
+ if (needs_copy && (entry = hv_fetch_ent(hv, keysv, TRUE, hash))) {
+ sv = HeVAL(entry);
+ mg_clear(sv);
+ if (!needs_store) {
+ if (mg_find(sv, 'p')) {
+ sv_unmagic(sv, 'p'); /* No longer an element */
+ return sv;
+ }
+ return Nullsv; /* element cannot be deleted */
+ }
+#ifdef ENV_IS_CASELESS
+ else if (mg_find((SV*)hv,'E')) {
+ key = SvPV(keysv, klen);
+ keysv = sv_2mortal(newSVpvn(key,klen));
+ (void)strupr(SvPVX(keysv));
+ hash = 0;
+ }
+#endif
}
}
xhv = (XPVHV*)SvANY(hv);
if (!xhv->xhv_array)
return Nullsv;
- i = klen;
- hash = 0;
- s = key;
- while (i--)
- hash = hash * 33 + *s++;
+
+ key = SvPV(keysv, klen);
+
+ if (!hash)
+ PERL_HASH(hash, key, klen);
oentry = &((HE**)xhv->xhv_array)[hash & (I32) xhv->xhv_max];
entry = *oentry;
i = 1;
- for (; entry; i=0, oentry = &entry->hent_next, entry = *oentry) {
- if (entry->hent_hash != hash) /* strings can't be equal */
+ for (; entry; i=0, oentry = &HeNEXT(entry), entry = *oentry) {
+ if (HeHASH(entry) != hash) /* strings can't be equal */
continue;
- if (entry->hent_klen != klen)
+ if (HeKLEN(entry) != klen)
continue;
- if (bcmp(entry->hent_key,key,klen)) /* is this it? */
+ if (memNE(HeKEY(entry),key,klen)) /* is this it? */
continue;
- *oentry = entry->hent_next;
+ *oentry = HeNEXT(entry);
if (i && !*oentry)
xhv->xhv_fill--;
if (flags & G_DISCARD)
sv = Nullsv;
else
- sv = sv_mortalcopy(entry->hent_val);
+ sv = sv_mortalcopy(HeVAL(entry));
if (entry == xhv->xhv_eiter)
- entry->hent_klen = -1;
+ HvLAZYDEL_on(hv);
else
- he_free(entry);
+ hv_free_ent(hv, entry);
--xhv->xhv_keys;
return sv;
}
}
bool
-hv_exists(hv,key,klen)
-HV *hv;
-char *key;
-U32 klen;
+Perl_hv_exists(pTHX_ HV *hv, const char *key, U32 klen)
{
register XPVHV* xhv;
- register char *s;
- register I32 i;
- register I32 hash;
+ register U32 hash;
register HE *entry;
SV *sv;
if (SvRMAGICAL(hv)) {
if (mg_find((SV*)hv,'P')) {
+ dTHR;
sv = sv_newmortal();
mg_copy((SV*)hv, sv, key, klen);
magic_existspack(sv, mg_find(sv, 'p'));
return SvTRUE(sv);
}
+#ifdef ENV_IS_CASELESS
+ else if (mg_find((SV*)hv,'E')) {
+ sv = sv_2mortal(newSVpvn(key,klen));
+ key = strupr(SvPVX(sv));
+ }
+#endif
}
xhv = (XPVHV*)SvANY(hv);
+#ifndef DYNAMIC_ENV_FETCH
if (!xhv->xhv_array)
return 0;
+#endif
- i = klen;
- hash = 0;
- s = key;
- while (i--)
- hash = hash * 33 + *s++;
+ PERL_HASH(hash, key, klen);
+#ifdef DYNAMIC_ENV_FETCH
+ if (!xhv->xhv_array) entry = Null(HE*);
+ else
+#endif
entry = ((HE**)xhv->xhv_array)[hash & (I32) xhv->xhv_max];
- for (; entry; entry = entry->hent_next) {
- if (entry->hent_hash != hash) /* strings can't be equal */
+ for (; entry; entry = HeNEXT(entry)) {
+ if (HeHASH(entry) != hash) /* strings can't be equal */
continue;
- if (entry->hent_klen != klen)
+ if (HeKLEN(entry) != klen)
continue;
- if (bcmp(entry->hent_key,key,klen)) /* is this it? */
+ if (memNE(HeKEY(entry),key,klen)) /* is this it? */
continue;
return TRUE;
}
+#ifdef DYNAMIC_ENV_FETCH /* is it out there? */
+ if (HvNAME(hv) && strEQ(HvNAME(hv), ENV_HV_NAME)) {
+ unsigned long len;
+ char *env = PerlEnv_ENVgetenv_len(key,&len);
+ if (env) {
+ sv = newSVpvn(env,len);
+ SvTAINTED_on(sv);
+ (void)hv_store(hv,key,klen,sv,hash);
+ return TRUE;
+ }
+ }
+#endif
return FALSE;
}
-static void
-hsplit(hv)
-HV *hv;
+
+bool
+Perl_hv_exists_ent(pTHX_ HV *hv, SV *keysv, U32 hash)
+{
+ register XPVHV* xhv;
+ register char *key;
+ STRLEN klen;
+ register HE *entry;
+ SV *sv;
+
+ if (!hv)
+ return 0;
+
+ if (SvRMAGICAL(hv)) {
+ if (mg_find((SV*)hv,'P')) {
+ dTHR; /* just for SvTRUE */
+ 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);
+ }
+#ifdef ENV_IS_CASELESS
+ else if (mg_find((SV*)hv,'E')) {
+ key = SvPV(keysv, klen);
+ keysv = sv_2mortal(newSVpvn(key,klen));
+ (void)strupr(SvPVX(keysv));
+ hash = 0;
+ }
+#endif
+ }
+
+ xhv = (XPVHV*)SvANY(hv);
+#ifndef DYNAMIC_ENV_FETCH
+ if (!xhv->xhv_array)
+ return 0;
+#endif
+
+ key = SvPV(keysv, klen);
+ if (!hash)
+ PERL_HASH(hash, key, klen);
+
+#ifdef DYNAMIC_ENV_FETCH
+ if (!xhv->xhv_array) entry = Null(HE*);
+ else
+#endif
+ entry = ((HE**)xhv->xhv_array)[hash & (I32) xhv->xhv_max];
+ for (; entry; entry = HeNEXT(entry)) {
+ if (HeHASH(entry) != hash) /* strings can't be equal */
+ continue;
+ if (HeKLEN(entry) != klen)
+ continue;
+ if (memNE(HeKEY(entry),key,klen)) /* is this it? */
+ continue;
+ return TRUE;
+ }
+#ifdef DYNAMIC_ENV_FETCH /* is it out there? */
+ if (HvNAME(hv) && strEQ(HvNAME(hv), ENV_HV_NAME)) {
+ unsigned long len;
+ char *env = PerlEnv_ENVgetenv_len(key,&len);
+ if (env) {
+ sv = newSVpvn(env,len);
+ SvTAINTED_on(sv);
+ (void)hv_store_ent(hv,keysv,sv,hash);
+ return TRUE;
+ }
+ }
+#endif
+ return FALSE;
+}
+
+STATIC void
+S_hsplit(pTHX_ HV *hv)
{
register XPVHV* xhv = (XPVHV*)SvANY(hv);
I32 oldsize = (I32) xhv->xhv_max + 1; /* sic(k) */
register I32 newsize = oldsize * 2;
register I32 i;
- register HE **a;
- register HE **b;
+ register char *a = xhv->xhv_array;
+ register HE **aep;
+ register HE **bep;
register HE *entry;
register HE **oentry;
- a = (HE**)xhv->xhv_array;
- nomemok = TRUE;
- Renew(a, newsize, HE*);
- nomemok = FALSE;
- Zero(&a[oldsize], oldsize, HE*); /* zero 2nd half*/
+ PL_nomemok = TRUE;
+#if defined(STRANGE_MALLOC) || defined(MYMALLOC)
+ Renew(a, ARRAY_ALLOC_BYTES(newsize), char);
+ if (!a) {
+ PL_nomemok = FALSE;
+ return;
+ }
+#else
+#define MALLOC_OVERHEAD 16
+ New(2, a, ARRAY_ALLOC_BYTES(newsize), char);
+ if (!a) {
+ PL_nomemok = FALSE;
+ return;
+ }
+ Copy(xhv->xhv_array, a, oldsize * sizeof(HE*), char);
+ if (oldsize >= 64) {
+ offer_nice_chunk(xhv->xhv_array, ARRAY_ALLOC_BYTES(oldsize));
+ }
+ else
+ Safefree(xhv->xhv_array);
+#endif
+
+ PL_nomemok = FALSE;
+ Zero(&a[oldsize * sizeof(HE*)], (newsize-oldsize) * sizeof(HE*), char); /* zero 2nd half*/
+ xhv->xhv_max = --newsize;
+ xhv->xhv_array = a;
+ aep = (HE**)a;
+
+ for (i=0; i<oldsize; i++,aep++) {
+ if (!*aep) /* non-existent */
+ continue;
+ bep = aep+oldsize;
+ for (oentry = aep, entry = *aep; entry; entry = *oentry) {
+ if ((HeHASH(entry) & newsize) != i) {
+ *oentry = HeNEXT(entry);
+ HeNEXT(entry) = *bep;
+ if (!*bep)
+ xhv->xhv_fill++;
+ *bep = entry;
+ continue;
+ }
+ else
+ oentry = &HeNEXT(entry);
+ }
+ if (!*aep) /* everything moved */
+ xhv->xhv_fill--;
+ }
+}
+
+void
+Perl_hv_ksplit(pTHX_ HV *hv, IV newmax)
+{
+ register XPVHV* xhv = (XPVHV*)SvANY(hv);
+ I32 oldsize = (I32) xhv->xhv_max + 1; /* sic(k) */
+ register I32 newsize;
+ register I32 i;
+ register I32 j;
+ register char *a;
+ register HE **aep;
+ register HE *entry;
+ register HE **oentry;
+
+ newsize = (I32) newmax; /* possible truncation here */
+ if (newsize != newmax || newmax <= oldsize)
+ return;
+ while ((newsize & (1 + ~newsize)) != newsize) {
+ newsize &= ~(newsize & (1 + ~newsize)); /* get proper power of 2 */
+ }
+ if (newsize < newmax)
+ newsize *= 2;
+ if (newsize < newmax)
+ return; /* overflow detection */
+
+ a = xhv->xhv_array;
+ if (a) {
+ PL_nomemok = TRUE;
+#if defined(STRANGE_MALLOC) || defined(MYMALLOC)
+ Renew(a, ARRAY_ALLOC_BYTES(newsize), char);
+ if (!a) {
+ PL_nomemok = FALSE;
+ return;
+ }
+#else
+ New(2, a, ARRAY_ALLOC_BYTES(newsize), char);
+ if (!a) {
+ PL_nomemok = FALSE;
+ return;
+ }
+ Copy(xhv->xhv_array, a, oldsize * sizeof(HE*), char);
+ if (oldsize >= 64) {
+ offer_nice_chunk(xhv->xhv_array, ARRAY_ALLOC_BYTES(oldsize));
+ }
+ else
+ Safefree(xhv->xhv_array);
+#endif
+ PL_nomemok = FALSE;
+ Zero(&a[oldsize * sizeof(HE*)], (newsize-oldsize) * sizeof(HE*), char); /* zero 2nd half*/
+ }
+ else {
+ Newz(0, a, ARRAY_ALLOC_BYTES(newsize), char);
+ }
xhv->xhv_max = --newsize;
- xhv->xhv_array = (char*)a;
+ xhv->xhv_array = a;
+ if (!xhv->xhv_fill) /* skip rest if no entries */
+ return;
- for (i=0; i<oldsize; i++,a++) {
- if (!*a) /* non-existent */
+ aep = (HE**)a;
+ for (i=0; i<oldsize; i++,aep++) {
+ if (!*aep) /* non-existent */
continue;
- b = a+oldsize;
- for (oentry = a, entry = *a; entry; entry = *oentry) {
- if ((entry->hent_hash & newsize) != i) {
- *oentry = entry->hent_next;
- entry->hent_next = *b;
- if (!*b)
+ for (oentry = aep, entry = *aep; entry; entry = *oentry) {
+ if ((j = (HeHASH(entry) & newsize)) != i) {
+ j -= i;
+ *oentry = HeNEXT(entry);
+ if (!(HeNEXT(entry) = aep[j]))
xhv->xhv_fill++;
- *b = entry;
+ aep[j] = entry;
continue;
}
else
- oentry = &entry->hent_next;
+ oentry = &HeNEXT(entry);
}
- if (!*a) /* everything moved */
+ if (!*aep) /* everything moved */
xhv->xhv_fill--;
}
}
HV *
-newHV()
+Perl_newHV(pTHX)
{
register HV *hv;
register XPVHV* xhv;
xhv = (XPVHV*)SvANY(hv);
SvPOK_off(hv);
SvNOK_off(hv);
+#ifndef NODEFAULT_SHAREKEYS
+ HvSHAREKEYS_on(hv); /* key-sharing on by default */
+#endif
xhv->xhv_max = 7; /* start with 8 buckets */
xhv->xhv_fill = 0;
xhv->xhv_pmroot = 0;
return hv;
}
+HV *
+Perl_newHVhv(pTHX_ HV *ohv)
+{
+ register HV *hv;
+ STRLEN hv_max = ohv ? HvMAX(ohv) : 0;
+ STRLEN hv_fill = ohv ? HvFILL(ohv) : 0;
+
+ hv = newHV();
+ while (hv_max && hv_max + 1 >= hv_fill * 2)
+ hv_max = hv_max / 2; /* Is always 2^n-1 */
+ HvMAX(hv) = hv_max;
+ if (!hv_fill)
+ return hv;
+
+#if 0
+ if (! SvTIED_mg((SV*)ohv, 'P')) {
+ /* Quick way ???*/
+ }
+ else
+#endif
+ {
+ HE *entry;
+ I32 hv_riter = HvRITER(ohv); /* current root of iterator */
+ HE *hv_eiter = HvEITER(ohv); /* current entry of iterator */
+
+ /* Slow way */
+ hv_iterinit(ohv);
+ while (entry = hv_iternext(ohv)) {
+ hv_store(hv, HeKEY(entry), HeKLEN(entry),
+ SvREFCNT_inc(HeVAL(entry)), HeHASH(entry));
+ }
+ HvRITER(ohv) = hv_riter;
+ HvEITER(ohv) = hv_eiter;
+ }
+
+ return hv;
+}
+
void
-he_free(hent)
-register HE *hent;
+Perl_hv_free_ent(pTHX_ HV *hv, register HE *entry)
{
- if (!hent)
+ SV *val;
+
+ if (!entry)
return;
- SvREFCNT_dec(hent->hent_val);
- Safefree(hent->hent_key);
- Safefree(hent);
+ val = HeVAL(entry);
+ if (val && isGV(val) && GvCVu(val) && HvNAME(hv))
+ PL_sub_generation++; /* may be deletion of method from stash */
+ SvREFCNT_dec(val);
+ if (HeKLEN(entry) == HEf_SVKEY) {
+ SvREFCNT_dec(HeKEY_sv(entry));
+ Safefree(HeKEY_hek(entry));
+ }
+ else if (HvSHAREKEYS(hv))
+ unshare_hek(HeKEY_hek(entry));
+ else
+ Safefree(HeKEY_hek(entry));
+ del_he(entry);
}
void
-he_delayfree(hent)
-register HE *hent;
+Perl_hv_delayfree_ent(pTHX_ HV *hv, register HE *entry)
{
- if (!hent)
+ if (!entry)
return;
- sv_2mortal(hent->hent_val); /* free between statements */
- Safefree(hent->hent_key);
- Safefree(hent);
+ if (isGV(HeVAL(entry)) && GvCVu(HeVAL(entry)) && HvNAME(hv))
+ PL_sub_generation++; /* may be deletion of method from stash */
+ sv_2mortal(HeVAL(entry)); /* free between statements */
+ if (HeKLEN(entry) == HEf_SVKEY) {
+ sv_2mortal(HeKEY_sv(entry));
+ Safefree(HeKEY_hek(entry));
+ }
+ else if (HvSHAREKEYS(hv))
+ unshare_hek(HeKEY_hek(entry));
+ else
+ Safefree(HeKEY_hek(entry));
+ del_he(entry);
}
void
-hv_clear(hv)
-HV *hv;
+Perl_hv_clear(pTHX_ HV *hv)
{
register XPVHV* xhv;
if (!hv)
mg_clear((SV*)hv);
}
-static void
-hfreeentries(hv)
-HV *hv;
+STATIC void
+S_hfreeentries(pTHX_ HV *hv)
{
register HE **array;
- register HE *hent;
- register HE *ohent = Null(HE*);
+ register HE *entry;
+ register HE *oentry = Null(HE*);
I32 riter;
I32 max;
riter = 0;
max = HvMAX(hv);
array = HvARRAY(hv);
- hent = array[0];
+ entry = array[0];
for (;;) {
- if (hent) {
- ohent = hent;
- hent = hent->hent_next;
- he_free(ohent);
+ if (entry) {
+ oentry = entry;
+ entry = HeNEXT(entry);
+ hv_free_ent(hv, oentry);
}
- if (!hent) {
+ if (!entry) {
if (++riter > max)
break;
- hent = array[riter];
+ entry = array[riter];
}
}
(void)hv_iterinit(hv);
}
void
-hv_undef(hv)
-HV *hv;
+Perl_hv_undef(pTHX_ HV *hv)
{
register XPVHV* xhv;
if (!hv)
HvNAME(hv) = 0;
}
xhv->xhv_array = 0;
- xhv->xhv_max = 7; /* it's a normal associative array */
+ xhv->xhv_max = 7; /* it's a normal hash */
xhv->xhv_fill = 0;
xhv->xhv_keys = 0;
}
I32
-hv_iterinit(hv)
-HV *hv;
+Perl_hv_iterinit(pTHX_ HV *hv)
{
- register XPVHV* xhv = (XPVHV*)SvANY(hv);
- HE *entry = xhv->xhv_eiter;
- if (entry && entry->hent_klen < 0) /* was deleted earlier? */
- he_free(entry);
+ register XPVHV* xhv;
+ HE *entry;
+
+ if (!hv)
+ Perl_croak(aTHX_ "Bad hash");
+ xhv = (XPVHV*)SvANY(hv);
+ entry = xhv->xhv_eiter;
+ if (entry && HvLAZYDEL(hv)) { /* was deleted earlier? */
+ HvLAZYDEL_off(hv);
+ hv_free_ent(hv, entry);
+ }
xhv->xhv_riter = -1;
xhv->xhv_eiter = Null(HE*);
- return xhv->xhv_fill;
+ return xhv->xhv_keys; /* used to be xhv->xhv_fill before 5.004_65 */
}
HE *
-hv_iternext(hv)
-HV *hv;
+Perl_hv_iternext(pTHX_ HV *hv)
{
register XPVHV* xhv;
register HE *entry;
MAGIC* mg;
if (!hv)
- croak("Bad associative array");
+ Perl_croak(aTHX_ "Bad hash");
xhv = (XPVHV*)SvANY(hv);
oldentry = entry = xhv->xhv_eiter;
- if (SvRMAGICAL(hv) && (mg = mg_find((SV*)hv,'P'))) {
+ if (mg = SvTIED_mg((SV*)hv, 'P')) {
SV *key = sv_newmortal();
if (entry) {
- sv_usepvn(key, entry->hent_key, entry->hent_klen);
- entry->hent_key = 0;
+ sv_setsv(key, HeSVKEY_force(entry));
+ SvREFCNT_dec(HeSVKEY(entry)); /* get rid of previous key */
}
else {
- Newz(504,entry, 1, HE);
- xhv->xhv_eiter = entry;
+ char *k;
+ HEK *hek;
+
+ 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;
+ HeKEY_hek(entry) = hek;
+ HeKLEN(entry) = HEf_SVKEY;
}
magic_nextpack((SV*) hv,mg,key);
if (SvOK(key)) {
- STRLEN len;
- entry->hent_key = SvPV_force(key, len);
- entry->hent_klen = len;
- SvPOK_off(key);
- SvPVX(key) = 0;
- return entry;
+ /* force key to stay around until next time */
+ HeSVKEY_set(entry, SvREFCNT_inc(key));
+ return entry; /* beware, hent_val is not set */
}
- if (entry->hent_val)
- SvREFCNT_dec(entry->hent_val);
- Safefree(entry);
+ if (HeVAL(entry))
+ SvREFCNT_dec(HeVAL(entry));
+ Safefree(HeKEY_hek(entry));
+ del_he(entry);
xhv->xhv_eiter = Null(HE*);
return Null(HE*);
}
+#ifdef DYNAMIC_ENV_FETCH /* set up %ENV for iteration */
+ if (!entry && HvNAME(hv) && strEQ(HvNAME(hv), ENV_HV_NAME))
+ prime_env_iter();
+#endif
if (!xhv->xhv_array)
- entry = Null(HE*);
- else
- do {
- if (entry)
- entry = entry->hent_next;
- if (!entry) {
- ++xhv->xhv_riter;
- if (xhv->xhv_riter > xhv->xhv_max) {
- xhv->xhv_riter = -1;
- break;
- }
- entry = ((HE**)xhv->xhv_array)[xhv->xhv_riter];
+ Newz(506,xhv->xhv_array, ARRAY_ALLOC_BYTES(xhv->xhv_max + 1), char);
+ if (entry)
+ entry = HeNEXT(entry);
+ while (!entry) {
+ ++xhv->xhv_riter;
+ if (xhv->xhv_riter > xhv->xhv_max) {
+ xhv->xhv_riter = -1;
+ break;
}
- } while (!entry);
+ entry = ((HE**)xhv->xhv_array)[xhv->xhv_riter];
+ }
- if (oldentry && oldentry->hent_klen < 0) /* was deleted earlier? */
- he_free(oldentry);
+ if (oldentry && HvLAZYDEL(hv)) { /* was deleted earlier? */
+ HvLAZYDEL_off(hv);
+ hv_free_ent(hv, oldentry);
+ }
xhv->xhv_eiter = entry;
return entry;
}
char *
-hv_iterkey(entry,retlen)
-register HE *entry;
-I32 *retlen;
+Perl_hv_iterkey(pTHX_ register HE *entry, I32 *retlen)
{
- *retlen = entry->hent_klen;
- return entry->hent_key;
+ if (HeKLEN(entry) == HEf_SVKEY) {
+ STRLEN len;
+ char *p = SvPV(HeKEY_sv(entry), len);
+ *retlen = len;
+ return p;
+ }
+ else {
+ *retlen = HeKLEN(entry);
+ return HeKEY(entry);
+ }
}
+/* unlike hv_iterval(), this always returns a mortal copy of the key */
SV *
-hv_iterval(hv,entry)
-HV *hv;
-register HE *entry;
+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)));
+}
+
+SV *
+Perl_hv_iterval(pTHX_ HV *hv, register HE *entry)
{
if (SvRMAGICAL(hv)) {
if (mg_find((SV*)hv,'P')) {
SV* sv = sv_newmortal();
- mg_copy((SV*)hv, sv, entry->hent_key, entry->hent_klen);
+ if (HeKLEN(entry) == HEf_SVKEY)
+ mg_copy((SV*)hv, sv, (char*)HeKEY_sv(entry), HEf_SVKEY);
+ else mg_copy((SV*)hv, sv, HeKEY(entry), HeKLEN(entry));
return sv;
}
}
- return entry->hent_val;
+ return HeVAL(entry);
}
SV *
-hv_iternextsv(hv, key, retlen)
- HV *hv;
- char **key;
- I32 *retlen;
+Perl_hv_iternextsv(pTHX_ HV *hv, char **key, I32 *retlen)
{
HE *he;
if ( (he = hv_iternext(hv)) == NULL)
}
void
-hv_magic(hv, gv, how)
-HV* hv;
-GV* gv;
-int how;
+Perl_hv_magic(pTHX_ HV *hv, GV *gv, int how)
{
sv_magic((SV*)hv, (SV*)gv, how, Nullch, 0);
}
+
+char*
+Perl_sharepvn(pTHX_ const char *sv, I32 len, U32 hash)
+{
+ return HEK_KEY(share_hek(sv, len, hash));
+}
+
+/* possibly free a shared string if no one has access to it
+ * len and hash must both be valid for str.
+ */
+void
+Perl_unsharepvn(pTHX_ const char *str, I32 len, U32 hash)
+{
+ register XPVHV* xhv;
+ register HE *entry;
+ register HE **oentry;
+ register I32 i = 1;
+ I32 found = 0;
+
+ /* what follows is the moral equivalent of:
+ if ((Svp = hv_fetch(PL_strtab, tmpsv, FALSE, hash))) {
+ if (--*Svp == Nullsv)
+ hv_delete(PL_strtab, str, len, G_DISCARD, hash);
+ } */
+ xhv = (XPVHV*)SvANY(PL_strtab);
+ /* assert(xhv_array != 0) */
+ LOCK_STRTAB_MUTEX;
+ oentry = &((HE**)xhv->xhv_array)[hash & (I32) xhv->xhv_max];
+ for (entry = *oentry; entry; i=0, oentry = &HeNEXT(entry), entry = *oentry) {
+ if (HeHASH(entry) != hash) /* strings can't be equal */
+ continue;
+ if (HeKLEN(entry) != len)
+ continue;
+ if (memNE(HeKEY(entry),str,len)) /* is this it? */
+ continue;
+ found = 1;
+ if (--HeVAL(entry) == Nullsv) {
+ *oentry = HeNEXT(entry);
+ if (i && !*oentry)
+ xhv->xhv_fill--;
+ Safefree(HeKEY_hek(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");
+ }
+}
+
+/* get a (constant) string ptr from the global string table
+ * string will get added if it is not already there.
+ * len and hash must both be valid for str.
+ */
+HEK *
+Perl_share_hek(pTHX_ const char *str, I32 len, register U32 hash)
+{
+ register XPVHV* xhv;
+ register HE *entry;
+ register HE **oentry;
+ register I32 i = 1;
+ I32 found = 0;
+
+ /* what follows is the moral equivalent of:
+
+ if (!(Svp = hv_fetch(PL_strtab, str, len, FALSE)))
+ hv_store(PL_strtab, str, len, Nullsv, hash);
+ */
+ xhv = (XPVHV*)SvANY(PL_strtab);
+ /* assert(xhv_array != 0) */
+ LOCK_STRTAB_MUTEX;
+ oentry = &((HE**)xhv->xhv_array)[hash & (I32) xhv->xhv_max];
+ for (entry = *oentry; entry; i=0, entry = HeNEXT(entry)) {
+ if (HeHASH(entry) != hash) /* strings can't be equal */
+ continue;
+ if (HeKLEN(entry) != len)
+ continue;
+ if (memNE(HeKEY(entry),str,len)) /* is this it? */
+ continue;
+ found = 1;
+ break;
+ }
+ if (!found) {
+ entry = new_he();
+ HeKEY_hek(entry) = save_hek(str, len, hash);
+ HeVAL(entry) = Nullsv;
+ HeNEXT(entry) = *oentry;
+ *oentry = entry;
+ xhv->xhv_keys++;
+ if (i) { /* initial entry? */
+ ++xhv->xhv_fill;
+ if (xhv->xhv_keys > xhv->xhv_max)
+ hsplit(PL_strtab);
+ }
+ }
+
+ ++HeVAL(entry); /* use value slot as REFCNT */
+ UNLOCK_STRTAB_MUTEX;
+ return HeKEY_hek(entry);
+}
+
+
+
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