diff options
author | Todd C. Miller <millert@cvs.openbsd.org> | 2000-04-06 17:09:19 +0000 |
---|---|---|
committer | Todd C. Miller <millert@cvs.openbsd.org> | 2000-04-06 17:09:19 +0000 |
commit | 4512cea31c94e21bbf22ca99a5bb525ea7a8c84c (patch) | |
tree | 628d1180baf59ff2cf578562cdd942fc008cf06b /gnu/usr.bin/perl/hv.c | |
parent | e852ed17d905386f3bbad057fda2f07926227f89 (diff) |
perl-5.6.0 + local changes
Diffstat (limited to 'gnu/usr.bin/perl/hv.c')
-rw-r--r-- | gnu/usr.bin/perl/hv.c | 488 |
1 files changed, 382 insertions, 106 deletions
diff --git a/gnu/usr.bin/perl/hv.c b/gnu/usr.bin/perl/hv.c index e0091eac23d..44d37e34d30 100644 --- a/gnu/usr.bin/perl/hv.c +++ b/gnu/usr.bin/perl/hv.c @@ -1,6 +1,6 @@ /* hv.c * - * Copyright (c) 1991-1999, Larry Wall + * Copyright (c) 1991-2000, 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. @@ -12,24 +12,11 @@ */ #include "EXTERN.h" +#define PERL_IN_HV_C #include "perl.h" -static void hv_magic_check _((HV *hv, bool *needs_copy, bool *needs_store)); -#ifndef PERL_OBJECT -static void hsplit _((HV *hv)); -static void hfreeentries _((HV *hv)); -static void more_he _((void)); -#endif - -#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)*sizeof(HE*)*2 - MALLOC_OVERHEAD ) -#endif - STATIC HE* -new_he(void) +S_new_he(pTHX) { HE* he; LOCK_SV_MUTEX; @@ -42,7 +29,7 @@ new_he(void) } STATIC void -del_he(HE *p) +S_del_he(pTHX_ HE *p) { LOCK_SV_MUTEX; HeNEXT(p) = (HE*)PL_he_root; @@ -51,7 +38,7 @@ del_he(HE *p) } STATIC void -more_he(void) +S_more_he(pTHX) { register HE* he; register HE* heend; @@ -65,8 +52,20 @@ more_he(void) 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 * -save_hek(char *str, I32 len, U32 hash) +S_save_hek(pTHX_ const char *str, I32 len, U32 hash) { char *k; register HEK *hek; @@ -81,16 +80,59 @@ save_hek(char *str, I32 len, U32 hash) } void -unshare_hek(HEK *hek) +Perl_unshare_hek(pTHX_ HEK *hek) { unsharepvn(HEK_KEY(hek),HEK_LEN(hek),HEK_HASH(hek)); } +#if defined(USE_ITHREADS) +HE * +Perl_he_dup(pTHX_ HE *e, bool shared) +{ + HE *ret; + + if (!e) + return Nullhe; + /* 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)); + else + HeKEY_hek(ret) = save_hek(HeKEY(e), HeKLEN(e), HeHASH(e)); + HeVAL(ret) = SvREFCNT_inc(sv_dup(HeVAL(e))); + return ret; +} +#endif /* USE_ITHREADS */ + /* (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** -hv_fetch(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 U32 hash; @@ -113,7 +155,7 @@ hv_fetch(HV *hv, char *key, U32 klen, I32 lval) U32 i; for (i = 0; i < klen; ++i) if (isLOWER(key[i])) { - char *nkey = strupr(SvPVX(sv_2mortal(newSVpv(key,klen)))); + 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); @@ -130,7 +172,8 @@ hv_fetch(HV *hv, char *key, U32 klen, I32 lval) || (HvNAME(hv) && strEQ(HvNAME(hv),ENV_HV_NAME)) #endif ) - Newz(503,xhv->xhv_array, ARRAY_ALLOC_BYTES(xhv->xhv_max + 1), char); + Newz(503, xhv->xhv_array, + PERL_HV_ARRAY_ALLOC_BYTES(xhv->xhv_max + 1), char); else return 0; } @@ -149,13 +192,13 @@ hv_fetch(HV *hv, char *key, U32 klen, I32 lval) } #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; - - if ((gotenv = PerlEnv_getenv(key)) != Nullch) { - sv = newSVpv(gotenv,strlen(gotenv)); - SvTAINTED_on(sv); - 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 */ @@ -167,8 +210,25 @@ hv_fetch(HV *hv, char *key, U32 klen, I32 lval) /* 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 * -hv_fetch_ent(HV *hv, SV *keysv, I32 lval, register U32 hash) +Perl_hv_fetch_ent(pTHX_ HV *hv, SV *keysv, I32 lval, register U32 hash) { register XPVHV* xhv; register char *key; @@ -200,7 +260,7 @@ hv_fetch_ent(HV *hv, SV *keysv, I32 lval, register U32 hash) key = SvPV(keysv, klen); for (i = 0; i < klen; ++i) if (isLOWER(key[i])) { - SV *nkeysv = sv_2mortal(newSVpv(key,klen)); + SV *nkeysv = sv_2mortal(newSVpvn(key,klen)); (void)strupr(SvPVX(nkeysv)); entry = hv_fetch_ent(hv, nkeysv, 0, 0); if (!entry && lval) @@ -218,7 +278,8 @@ hv_fetch_ent(HV *hv, SV *keysv, I32 lval, register U32 hash) || (HvNAME(hv) && strEQ(HvNAME(hv),ENV_HV_NAME)) #endif ) - Newz(503,xhv->xhv_array, ARRAY_ALLOC_BYTES(xhv->xhv_max + 1), char); + Newz(503, xhv->xhv_array, + PERL_HV_ARRAY_ALLOC_BYTES(xhv->xhv_max + 1), char); else return 0; } @@ -240,13 +301,13 @@ hv_fetch_ent(HV *hv, SV *keysv, I32 lval, register U32 hash) } #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; - - if ((gotenv = PerlEnv_getenv(key)) != Nullch) { - sv = newSVpv(gotenv,strlen(gotenv)); - SvTAINTED_on(sv); - return hv_store_ent(hv,keysv,sv,hash); - } + 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 */ @@ -256,8 +317,8 @@ hv_fetch_ent(HV *hv, SV *keysv, I32 lval, register U32 hash) return 0; } -static void -hv_magic_check (HV *hv, bool *needs_copy, bool *needs_store) +STATIC void +S_hv_magic_check(pTHX_ HV *hv, bool *needs_copy, bool *needs_store) { MAGIC *mg = SvMAGIC(hv); *needs_copy = FALSE; @@ -275,8 +336,26 @@ hv_magic_check (HV *hv, bool *needs_copy, bool *needs_store) } } +/* +=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** -hv_store(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 I32 i; @@ -297,7 +376,7 @@ hv_store(HV *hv, char *key, U32 klen, SV *val, register U32 hash) return 0; #ifdef ENV_IS_CASELESS else if (mg_find((SV*)hv,'E')) { - SV *sv = sv_2mortal(newSVpv(key,klen)); + SV *sv = sv_2mortal(newSVpvn(key,klen)); key = strupr(SvPVX(sv)); hash = 0; } @@ -308,7 +387,8 @@ hv_store(HV *hv, char *key, U32 klen, SV *val, register U32 hash) PERL_HASH(hash, key, klen); if (!xhv->xhv_array) - Newz(505, xhv->xhv_array, ARRAY_ALLOC_BYTES(xhv->xhv_max + 1), char); + Newz(505, xhv->xhv_array, + PERL_HV_ARRAY_ALLOC_BYTES(xhv->xhv_max + 1), char); oentry = &((HE**)xhv->xhv_array)[hash & (I32) xhv->xhv_max]; i = 1; @@ -325,7 +405,7 @@ hv_store(HV *hv, char *key, U32 klen, SV *val, register U32 hash) return &HeVAL(entry); } - entry = new_he(); + entry = new_HE(); if (HvSHAREKEYS(hv)) HeKEY_hek(entry) = share_hek(key, klen, hash); else /* gotta do the real thing */ @@ -344,8 +424,27 @@ hv_store(HV *hv, char *key, U32 klen, SV *val, register U32 hash) 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 * -hv_store_ent(HV *hv, SV *keysv, SV *val, register U32 hash) +Perl_hv_store_ent(pTHX_ HV *hv, SV *keysv, SV *val, register U32 hash) { register XPVHV* xhv; register char *key; @@ -375,7 +474,7 @@ hv_store_ent(HV *hv, SV *keysv, SV *val, register U32 hash) #ifdef ENV_IS_CASELESS else if (mg_find((SV*)hv,'E')) { key = SvPV(keysv, klen); - keysv = sv_2mortal(newSVpv(key,klen)); + keysv = sv_2mortal(newSVpvn(key,klen)); (void)strupr(SvPVX(keysv)); hash = 0; } @@ -389,7 +488,8 @@ hv_store_ent(HV *hv, SV *keysv, SV *val, register U32 hash) PERL_HASH(hash, key, klen); if (!xhv->xhv_array) - Newz(505, xhv->xhv_array, ARRAY_ALLOC_BYTES(xhv->xhv_max + 1), char); + Newz(505, xhv->xhv_array, + PERL_HV_ARRAY_ALLOC_BYTES(xhv->xhv_max + 1), char); oentry = &((HE**)xhv->xhv_array)[hash & (I32) xhv->xhv_max]; i = 1; @@ -406,7 +506,7 @@ hv_store_ent(HV *hv, SV *keysv, SV *val, register U32 hash) return entry; } - entry = new_he(); + entry = new_HE(); if (HvSHAREKEYS(hv)) HeKEY_hek(entry) = share_hek(key, klen, hash); else /* gotta do the real thing */ @@ -425,8 +525,19 @@ hv_store_ent(HV *hv, SV *keysv, SV *val, register U32 hash) 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 * -hv_delete(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 I32 i; @@ -455,7 +566,7 @@ hv_delete(HV *hv, char *key, U32 klen, I32 flags) } #ifdef ENV_IS_CASELESS else if (mg_find((SV*)hv,'E')) { - sv = sv_2mortal(newSVpv(key,klen)); + sv = sv_2mortal(newSVpvn(key,klen)); key = strupr(SvPVX(sv)); } #endif @@ -482,8 +593,10 @@ hv_delete(HV *hv, char *key, U32 klen, I32 flags) 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 @@ -494,8 +607,19 @@ hv_delete(HV *hv, char *key, U32 klen, I32 flags) 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 * -hv_delete_ent(HV *hv, SV *keysv, I32 flags, U32 hash) +Perl_hv_delete_ent(pTHX_ HV *hv, SV *keysv, I32 flags, U32 hash) { register XPVHV* xhv; register I32 i; @@ -525,7 +649,7 @@ hv_delete_ent(HV *hv, SV *keysv, I32 flags, U32 hash) #ifdef ENV_IS_CASELESS else if (mg_find((SV*)hv,'E')) { key = SvPV(keysv, klen); - keysv = sv_2mortal(newSVpv(key,klen)); + keysv = sv_2mortal(newSVpvn(key,klen)); (void)strupr(SvPVX(keysv)); hash = 0; } @@ -556,8 +680,10 @@ hv_delete_ent(HV *hv, SV *keysv, I32 flags, U32 hash) 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 @@ -568,8 +694,17 @@ hv_delete_ent(HV *hv, SV *keysv, I32 flags, U32 hash) 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 -hv_exists(HV *hv, char *key, U32 klen) +Perl_hv_exists(pTHX_ HV *hv, const char *key, U32 klen) { register XPVHV* xhv; register U32 hash; @@ -589,18 +724,24 @@ hv_exists(HV *hv, char *key, U32 klen) } #ifdef ENV_IS_CASELESS else if (mg_find((SV*)hv,'E')) { - sv = sv_2mortal(newSVpv(key,klen)); + 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 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 */ @@ -611,12 +752,34 @@ hv_exists(HV *hv, char *key, U32 klen) 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; } +/* +=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 -hv_exists_ent(HV *hv, SV *keysv, U32 hash) +Perl_hv_exists_ent(pTHX_ HV *hv, SV *keysv, U32 hash) { register XPVHV* xhv; register char *key; @@ -639,7 +802,7 @@ hv_exists_ent(HV *hv, SV *keysv, U32 hash) #ifdef ENV_IS_CASELESS else if (mg_find((SV*)hv,'E')) { key = SvPV(keysv, klen); - keysv = sv_2mortal(newSVpv(key,klen)); + keysv = sv_2mortal(newSVpvn(key,klen)); (void)strupr(SvPVX(keysv)); hash = 0; } @@ -647,13 +810,19 @@ hv_exists_ent(HV *hv, SV *keysv, U32 hash) } 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 */ @@ -664,11 +833,23 @@ hv_exists_ent(HV *hv, SV *keysv, U32 hash) 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 -hsplit(HV *hv) +S_hsplit(pTHX_ HV *hv) { register XPVHV* xhv = (XPVHV*)SvANY(hv); I32 oldsize = (I32) xhv->xhv_max + 1; /* sic(k) */ @@ -682,21 +863,21 @@ hsplit(HV *hv) PL_nomemok = TRUE; #if defined(STRANGE_MALLOC) || defined(MYMALLOC) - Renew(a, ARRAY_ALLOC_BYTES(newsize), char); + Renew(a, PERL_HV_ARRAY_ALLOC_BYTES(newsize), char); if (!a) { PL_nomemok = FALSE; return; } #else #define MALLOC_OVERHEAD 16 - New(2, a, ARRAY_ALLOC_BYTES(newsize), char); + New(2, a, PERL_HV_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)); + offer_nice_chunk(xhv->xhv_array, PERL_HV_ARRAY_ALLOC_BYTES(oldsize)); } else Safefree(xhv->xhv_array); @@ -730,7 +911,7 @@ hsplit(HV *hv) } void -hv_ksplit(HV *hv, IV newmax) +Perl_hv_ksplit(pTHX_ HV *hv, IV newmax) { register XPVHV* xhv = (XPVHV*)SvANY(hv); I32 oldsize = (I32) xhv->xhv_max + 1; /* sic(k) */ @@ -757,20 +938,20 @@ hv_ksplit(HV *hv, IV newmax) if (a) { PL_nomemok = TRUE; #if defined(STRANGE_MALLOC) || defined(MYMALLOC) - Renew(a, ARRAY_ALLOC_BYTES(newsize), char); + Renew(a, PERL_HV_ARRAY_ALLOC_BYTES(newsize), char); if (!a) { PL_nomemok = FALSE; return; } #else - New(2, a, ARRAY_ALLOC_BYTES(newsize), char); + New(2, a, PERL_HV_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)); + offer_nice_chunk(xhv->xhv_array, PERL_HV_ARRAY_ALLOC_BYTES(oldsize)); } else Safefree(xhv->xhv_array); @@ -779,7 +960,7 @@ hv_ksplit(HV *hv, IV newmax) Zero(&a[oldsize * sizeof(HE*)], (newsize-oldsize) * sizeof(HE*), char); /* zero 2nd half*/ } else { - Newz(0, a, ARRAY_ALLOC_BYTES(newsize), char); + Newz(0, a, PERL_HV_ARRAY_ALLOC_BYTES(newsize), char); } xhv->xhv_max = --newsize; xhv->xhv_array = a; @@ -807,8 +988,16 @@ hv_ksplit(HV *hv, IV newmax) } } +/* +=for apidoc newHV + +Creates a new HV. The reference count is set to 1. + +=cut +*/ + HV * -newHV(void) +Perl_newHV(pTHX) { register HV *hv; register XPVHV* xhv; @@ -829,7 +1018,7 @@ newHV(void) } HV * -newHVhv(HV *ohv) +Perl_newHVhv(pTHX_ HV *ohv) { register HV *hv; STRLEN hv_max = ohv ? HvMAX(ohv) : 0; @@ -855,7 +1044,7 @@ newHVhv(HV *ohv) /* Slow way */ hv_iterinit(ohv); - while (entry = hv_iternext(ohv)) { + while ((entry = hv_iternext(ohv))) { hv_store(hv, HeKEY(entry), HeKLEN(entry), SvREFCNT_inc(HeVAL(entry)), HeHASH(entry)); } @@ -867,7 +1056,7 @@ newHVhv(HV *ohv) } void -hv_free_ent(HV *hv, register HE *entry) +Perl_hv_free_ent(pTHX_ HV *hv, register HE *entry) { SV *val; @@ -885,11 +1074,11 @@ hv_free_ent(HV *hv, register HE *entry) unshare_hek(HeKEY_hek(entry)); else Safefree(HeKEY_hek(entry)); - del_he(entry); + del_HE(entry); } void -hv_delayfree_ent(HV *hv, register HE *entry) +Perl_hv_delayfree_ent(pTHX_ HV *hv, register HE *entry) { if (!entry) return; @@ -904,11 +1093,19 @@ hv_delayfree_ent(HV *hv, register HE *entry) 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 -hv_clear(HV *hv) +Perl_hv_clear(pTHX_ HV *hv) { register XPVHV* xhv; if (!hv) @@ -925,7 +1122,7 @@ hv_clear(HV *hv) } STATIC void -hfreeentries(HV *hv) +S_hfreeentries(pTHX_ HV *hv) { register HE **array; register HE *entry; @@ -957,8 +1154,16 @@ hfreeentries(HV *hv) (void)hv_iterinit(hv); } +/* +=for apidoc hv_undef + +Undefines the hash. + +=cut +*/ + void -hv_undef(HV *hv) +Perl_hv_undef(pTHX_ HV *hv) { register XPVHV* xhv; if (!hv) @@ -979,20 +1184,30 @@ hv_undef(HV *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 -hv_iterinit(HV *hv) +Perl_hv_iterinit(pTHX_ HV *hv) { register XPVHV* xhv; HE *entry; if (!hv) - croak("Bad hash"); + Perl_croak(aTHX_ "Bad hash"); xhv = (XPVHV*)SvANY(hv); entry = xhv->xhv_eiter; -#ifdef DYNAMIC_ENV_FETCH /* set up %ENV for iteration */ - if (HvNAME(hv) && strEQ(HvNAME(hv), ENV_HV_NAME)) - prime_env_iter(); -#endif if (entry && HvLAZYDEL(hv)) { /* was deleted earlier? */ HvLAZYDEL_off(hv); hv_free_ent(hv, entry); @@ -1002,8 +1217,16 @@ hv_iterinit(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 * -hv_iternext(HV *hv) +Perl_hv_iternext(pTHX_ HV *hv) { register XPVHV* xhv; register HE *entry; @@ -1011,11 +1234,11 @@ hv_iternext(HV *hv) MAGIC* mg; if (!hv) - croak("Bad hash"); + Perl_croak(aTHX_ "Bad hash"); xhv = (XPVHV*)SvANY(hv); oldentry = entry = xhv->xhv_eiter; - if (mg = SvTIED_mg((SV*)hv, 'P')) { + if ((mg = SvTIED_mg((SV*)hv, 'P'))) { SV *key = sv_newmortal(); if (entry) { sv_setsv(key, HeSVKEY_force(entry)); @@ -1025,7 +1248,7 @@ hv_iternext(HV *hv) 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; @@ -1041,13 +1264,18 @@ hv_iternext(HV *hv) 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*); } +#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) - Newz(506,xhv->xhv_array, ARRAY_ALLOC_BYTES(xhv->xhv_max + 1), char); + Newz(506, xhv->xhv_array, + PERL_HV_ARRAY_ALLOC_BYTES(xhv->xhv_max + 1), char); if (entry) entry = HeNEXT(entry); while (!entry) { @@ -1068,8 +1296,17 @@ hv_iternext(HV *hv) return entry; } +/* +=for apidoc hv_iterkey + +Returns the key from the current position of the hash iterator. See +C<hv_iterinit>. + +=cut +*/ + char * -hv_iterkey(register HE *entry, I32 *retlen) +Perl_hv_iterkey(pTHX_ register HE *entry, I32 *retlen) { if (HeKLEN(entry) == HEf_SVKEY) { STRLEN len; @@ -1084,18 +1321,37 @@ hv_iterkey(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 * -hv_iterkeysv(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(newSVpv((HeKLEN(entry) ? HeKEY(entry) : ""), + return sv_2mortal(newSVpvn((HeKLEN(entry) ? HeKEY(entry) : ""), HeKLEN(entry))); } +/* +=for apidoc hv_iterval + +Returns the value from the current position of the hash iterator. See +C<hv_iterkey>. + +=cut +*/ + SV * -hv_iterval(HV *hv, register HE *entry) +Perl_hv_iterval(pTHX_ HV *hv, register HE *entry) { if (SvRMAGICAL(hv)) { if (mg_find((SV*)hv,'P')) { @@ -1109,8 +1365,17 @@ hv_iterval(HV *hv, register HE *entry) return HeVAL(entry); } +/* +=for apidoc hv_iternextsv + +Performs an C<hv_iternext>, C<hv_iterkey>, and C<hv_iterval> in one +operation. + +=cut +*/ + SV * -hv_iternextsv(HV *hv, char **key, I32 *retlen) +Perl_hv_iternextsv(pTHX_ HV *hv, char **key, I32 *retlen) { HE *he; if ( (he = hv_iternext(hv)) == NULL) @@ -1119,14 +1384,22 @@ hv_iternextsv(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 -hv_magic(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* -sharepvn(char *sv, I32 len, U32 hash) +Perl_sharepvn(pTHX_ const char *sv, I32 len, U32 hash) { return HEK_KEY(share_hek(sv, len, hash)); } @@ -1135,7 +1408,7 @@ sharepvn(char *sv, I32 len, U32 hash) * len and hash must both be valid for str. */ void -unsharepvn(char *str, I32 len, U32 hash) +Perl_unsharepvn(pTHX_ const char *str, I32 len, U32 hash) { register XPVHV* xhv; register HE *entry; @@ -1165,15 +1438,18 @@ unsharepvn(char *str, I32 len, U32 hash) if (i && !*oentry) xhv->xhv_fill--; Safefree(HeKEY_hek(entry)); - del_he(entry); + del_HE(entry); --xhv->xhv_keys; } break; } UNLOCK_STRTAB_MUTEX; - if (!found) - warn("Attempt to free non-existent shared string"); + { + 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 @@ -1181,7 +1457,7 @@ unsharepvn(char *str, I32 len, U32 hash) * len and hash must both be valid for str. */ HEK * -share_hek(char *str, I32 len, register U32 hash) +Perl_share_hek(pTHX_ const char *str, I32 len, register U32 hash) { register XPVHV* xhv; register HE *entry; @@ -1209,7 +1485,7 @@ share_hek(char *str, I32 len, register U32 hash) break; } if (!found) { - entry = new_he(); + entry = new_HE(); HeKEY_hek(entry) = save_hek(str, len, hash); HeVAL(entry) = Nullsv; HeNEXT(entry) = *oentry; |