X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=av.c;h=3dfdf9a6edfcbac64d32765b9b677831a6836198;hb=eeb9de022215ff745a61968bf9408965f4687655;hp=a1d62fbdcbe17f5afb6305d57ce450f610616496;hpb=6f12eb6d2a1dfaf441504d869b27d2e40ef4966a;p=p5sagit%2Fp5-mst-13.2.git diff --git a/av.c b/av.c index a1d62fb..3dfdf9a 100644 --- a/av.c +++ b/av.c @@ -1,6 +1,7 @@ /* av.c * - * Copyright (c) 1991-2002, Larry Wall + * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, + * 2000, 2001, 2002, 2003, 2004, 2005, 2006, by Larry Wall and others * * You may distribute under the terms of either the GNU General Public * License or the Artistic License, as specified in the README file. @@ -23,8 +24,10 @@ void Perl_av_reify(pTHX_ AV *av) { + dVAR; I32 key; - SV* sv; + + assert(av); if (AvREAL(av)) return; @@ -36,10 +39,10 @@ Perl_av_reify(pTHX_ AV *av) while (key > AvFILLp(av) + 1) AvARRAY(av)[--key] = &PL_sv_undef; while (key) { - sv = AvARRAY(av)[--key]; + SV * const sv = AvARRAY(av)[--key]; assert(sv); if (sv != &PL_sv_undef) - (void)SvREFCNT_inc(sv); + SvREFCNT_inc_simple_void_NN(sv); } key = AvARRAY(av) - AvALLOC(av); while (key) @@ -60,8 +63,13 @@ extended. void Perl_av_extend(pTHX_ AV *av, I32 key) { + dVAR; MAGIC *mg; - if ((mg = SvTIED_mg((SV*)av, PERL_MAGIC_tied))) { + + assert(av); + + mg = SvTIED_mg((SV*)av, PERL_MAGIC_tied); + if (mg) { dSP; ENTER; SAVETMPS; @@ -87,25 +95,29 @@ Perl_av_extend(pTHX_ AV *av, I32 key) tmp = AvARRAY(av) - AvALLOC(av); Move(AvARRAY(av), AvALLOC(av), AvFILLp(av)+1, SV*); AvMAX(av) += tmp; - SvPVX(av) = (char*)AvALLOC(av); + SvPV_set(av, (char*)AvALLOC(av)); if (AvREAL(av)) { while (tmp) ary[--tmp] = &PL_sv_undef; } - if (key > AvMAX(av) - 10) { newmax = key + AvMAX(av); goto resize; } } else { +#ifdef PERL_MALLOC_WRAP + static const char oom_array_extend[] = + "Out of memory during array extend"; /* Duplicated in pp_hot.c */ +#endif + if (AvALLOC(av)) { #if !defined(STRANGE_MALLOC) && !defined(MYMALLOC) MEM_SIZE bytes; IV itmp; #endif -#if defined(MYMALLOC) && !defined(LEAKTEST) +#ifdef MYMALLOC newmax = malloced_size((void*)AvALLOC(av))/sizeof(SV*) - 1; if (key <= newmax) @@ -113,6 +125,7 @@ Perl_av_extend(pTHX_ AV *av, I32 key) #endif newmax = key + AvMAX(av) / 5; resize: + MEM_WRAP_CHECK_1(newmax+1, SV*, oom_array_extend); #if defined(STRANGE_MALLOC) || defined(MYMALLOC) Renew(AvALLOC(av),newmax+1, SV*); #else @@ -126,7 +139,7 @@ Perl_av_extend(pTHX_ AV *av, I32 key) assert(itmp > newmax); newmax = itmp - 1; assert(newmax >= AvMAX(av)); - New(2,ary, newmax+1, SV*); + Newx(ary, newmax+1, SV*); Copy(AvALLOC(av), ary, AvMAX(av)+1, SV*); if (AvMAX(av) > 64) offer_nice_chunk(AvALLOC(av), (AvMAX(av)+1) * sizeof(SV*)); @@ -134,7 +147,7 @@ Perl_av_extend(pTHX_ AV *av, I32 key) Safefree(AvALLOC(av)); AvALLOC(av) = ary; #endif -#if defined(MYMALLOC) && !defined(LEAKTEST) +#ifdef MYMALLOC resized: #endif ary = AvALLOC(av) + AvMAX(av) + 1; @@ -147,7 +160,8 @@ Perl_av_extend(pTHX_ AV *av, I32 key) } else { newmax = key < 3 ? 3 : key; - New(2,AvALLOC(av), newmax+1, SV*); + MEM_WRAP_CHECK_1(newmax+1, SV*, oom_array_extend); + Newx(AvALLOC(av), newmax+1, SV*); ary = AvALLOC(av) + 1; tmp = newmax; AvALLOC(av)[0] = &PL_sv_undef; /* For the stacks */ @@ -157,7 +171,7 @@ Perl_av_extend(pTHX_ AV *av, I32 key) ary[--tmp] = &PL_sv_undef; } - SvPVX(av) = (char*)AvALLOC(av); + SvPV_set(av, (char*)AvALLOC(av)); AvMAX(av) = newmax; } } @@ -179,64 +193,62 @@ more information on how to use this function on tied arrays. SV** Perl_av_fetch(pTHX_ register AV *av, I32 key, I32 lval) { - SV *sv; + dVAR; - if (!av) - return 0; + assert(av); if (SvRMAGICAL(av)) { - MAGIC *tied_magic = mg_find((SV*)av, PERL_MAGIC_tied); + const MAGIC * const tied_magic = mg_find((SV*)av, PERL_MAGIC_tied); if (tied_magic || mg_find((SV*)av, PERL_MAGIC_regdata)) { - U32 adjust_index = 1; - - if (tied_magic && key < 0) { - /* Handle negative array indices 20020222 MJD */ - SV **negative_indices_glob = - hv_fetch(SvSTASH(SvRV(SvTIED_obj((SV *)av, - tied_magic))), - NEGATIVE_INDICES_VAR, 16, 0); - - if (negative_indices_glob - && SvTRUE(GvSV(*negative_indices_glob))) - adjust_index = 0; - } + SV *sv; + if (key < 0) { + I32 adjust_index = 1; + if (tied_magic) { + /* Handle negative array indices 20020222 MJD */ + SV * const * const negative_indices_glob = + hv_fetch(SvSTASH(SvRV(SvTIED_obj((SV *)av, tied_magic))), + NEGATIVE_INDICES_VAR, 16, 0); + + if (negative_indices_glob && SvTRUE(GvSV(*negative_indices_glob))) + adjust_index = 0; + } - if (key < 0 && adjust_index) { - key += AvFILL(av) + 1; - if (key < 0) - return 0; - } + if (adjust_index) { + key += AvFILL(av) + 1; + if (key < 0) + return NULL; + } + } sv = sv_newmortal(); - mg_copy((SV*)av, sv, 0, key); - PL_av_fetch_sv = sv; - return &PL_av_fetch_sv; + sv_upgrade(sv, SVt_PVLV); + mg_copy((SV*)av, sv, 0, key); + LvTYPE(sv) = 't'; + LvTARG(sv) = sv; /* fake (SV**) */ + return &(LvTARG(sv)); } } if (key < 0) { key += AvFILL(av) + 1; if (key < 0) - return 0; + return NULL; } if (key > AvFILLp(av)) { if (!lval) - return 0; - sv = NEWSV(5,0); - return av_store(av,key,sv); + return NULL; + return av_store(av,key,newSV(0)); } if (AvARRAY(av)[key] == &PL_sv_undef) { emptyness: - if (lval) { - sv = NEWSV(6,0); - return av_store(av,key,sv); - } - return 0; + if (lval) + return av_store(av,key,newSV(0)); + return NULL; } else if (AvREIFY(av) && (!AvARRAY(av)[key] /* eg. @_ could have freed elts */ - || SvTYPE(AvARRAY(av)[key]) == SVTYPEMASK)) { + || SvIS_FREED(AvARRAY(av)[key]))) { AvARRAY(av)[key] = &PL_sv_undef; /* 1/2 reify */ goto emptyness; } @@ -263,20 +275,25 @@ more information on how to use this function on tied arrays. SV** Perl_av_store(pTHX_ register AV *av, I32 key, SV *val) { + dVAR; SV** ary; - if (!av) - return 0; + assert(av); + + /* S_regclass relies on being able to pass in a NULL sv + (unicode_alternate may be NULL). + */ + if (!val) val = &PL_sv_undef; if (SvRMAGICAL(av)) { - MAGIC *tied_magic = mg_find((SV*)av, PERL_MAGIC_tied); + const MAGIC * const tied_magic = mg_find((SV*)av, PERL_MAGIC_tied); if (tied_magic) { /* Handle negative array indices 20020222 MJD */ if (key < 0) { - unsigned adjust_index = 1; - SV **negative_indices_glob = + bool adjust_index = 1; + SV * const * const negative_indices_glob = hv_fetch(SvSTASH(SvRV(SvTIED_obj((SV *)av, tied_magic))), NEGATIVE_INDICES_VAR, 16, 0); @@ -292,7 +309,7 @@ Perl_av_store(pTHX_ register AV *av, I32 key, SV *val) if (val != &PL_sv_undef) { mg_copy((SV*)av, val, 0, key); } - return 0; + return NULL; } } @@ -300,7 +317,7 @@ Perl_av_store(pTHX_ register AV *av, I32 key, SV *val) if (key < 0) { key += AvFILL(av) + 1; if (key < 0) - return 0; + return NULL; } if (SvREADONLY(av) && key >= AvFILL(av)) @@ -315,9 +332,9 @@ Perl_av_store(pTHX_ register AV *av, I32 key, SV *val) if (!AvREAL(av)) { if (av == PL_curstack && key > PL_stack_sp - PL_stack_base) PL_stack_sp = PL_stack_base + key; /* XPUSH in disguise */ - do + do { ary[++AvFILLp(av)] = &PL_sv_undef; - while (AvFILLp(av) < key); + } while (AvFILLp(av) < key); } AvFILLp(av) = key; } @@ -326,7 +343,7 @@ Perl_av_store(pTHX_ register AV *av, I32 key, SV *val) ary[key] = val; if (SvSMAGICAL(av)) { if (val != &PL_sv_undef) { - MAGIC* mg = SvMAGIC(av); + const MAGIC* const mg = SvMAGIC(av); sv_magic(val, (SV*)av, toLOWER(mg->mg_type), 0, key); } mg_set((SV*)av); @@ -345,13 +362,12 @@ Creates a new AV. The reference count is set to 1. AV * Perl_newAV(pTHX) { - register AV *av; + register AV * const av = (AV*)newSV(0); - av = (AV*)NEWSV(3,0); sv_upgrade((SV *)av, SVt_PVAV); - AvREAL_on(av); + /* sv_upgrade does AvREAL_only() */ AvALLOC(av) = 0; - SvPVX(av) = 0; + SvPV_set(av, NULL); AvMAX(av) = AvFILLp(av) = -1; return av; } @@ -369,22 +385,20 @@ will have a reference count of 1. AV * Perl_av_make(pTHX_ register I32 size, register SV **strp) { - register AV *av; - register I32 i; - register SV** ary; + register AV * const av = (AV*)newSV(0); - av = (AV*)NEWSV(8,0); sv_upgrade((SV *) av,SVt_PVAV); - AvFLAGS(av) = AVf_REAL; - if (size) { /* `defined' was returning undef for size==0 anyway. */ - New(4,ary,size,SV*); + /* sv_upgrade does AvREAL_only() */ + if (size) { /* "defined" was returning undef for size==0 anyway. */ + register SV** ary; + register I32 i; + Newx(ary,size,SV*); AvALLOC(av) = ary; - SvPVX(av) = (char*)ary; - AvFILLp(av) = size - 1; - AvMAX(av) = size - 1; + SvPV_set(av, (char*)ary); + AvFILLp(av) = AvMAX(av) = size - 1; for (i = 0; i < size; i++) { assert (*strp); - ary[i] = NEWSV(7,0); + ary[i] = newSV(0); sv_setsv(ary[i], *strp); strp++; } @@ -392,29 +406,6 @@ Perl_av_make(pTHX_ register I32 size, register SV **strp) return av; } -AV * -Perl_av_fake(pTHX_ register I32 size, register SV **strp) -{ - register AV *av; - register SV** ary; - - av = (AV*)NEWSV(9,0); - sv_upgrade((SV *)av, SVt_PVAV); - New(4,ary,size+1,SV*); - AvALLOC(av) = ary; - Copy(strp,ary,size,SV*); - AvFLAGS(av) = AVf_REIFY; - SvPVX(av) = (char*)ary; - AvFILLp(av) = size - 1; - AvMAX(av) = size - 1; - while (size--) { - assert (*strp); - SvTEMP_off(*strp); - strp++; - } - return av; -} - /* =for apidoc av_clear @@ -427,17 +418,15 @@ array itself. void Perl_av_clear(pTHX_ register AV *av) { - register I32 key; - SV** ary; + dVAR; + I32 extra; + assert(av); #ifdef DEBUGGING if (SvREFCNT(av) == 0 && ckWARN_d(WARN_DEBUGGING)) { Perl_warner(aTHX_ packWARN(WARN_DEBUGGING), "Attempt to clear deleted array"); } #endif - if (!av) - return; - /*SUPPRESS 560*/ if (SvREADONLY(av)) Perl_croak(aTHX_ PL_no_modify); @@ -450,16 +439,20 @@ Perl_av_clear(pTHX_ register AV *av) return; if (AvREAL(av)) { - ary = AvARRAY(av); - key = AvFILLp(av) + 1; - while (key) { - SvREFCNT_dec(ary[--key]); - ary[key] = &PL_sv_undef; + SV** const ary = AvARRAY(av); + I32 index = AvFILLp(av) + 1; + while (index) { + SV * const sv = ary[--index]; + /* undef the slot before freeing the value, because a + * destructor might try to modify this array */ + ary[index] = &PL_sv_undef; + SvREFCNT_dec(sv); } } - if ((key = AvARRAY(av) - AvALLOC(av))) { - AvMAX(av) += key; - SvPVX(av) = (char*)AvALLOC(av); + extra = AvARRAY(av) - AvALLOC(av); + if (extra) { + AvMAX(av) += extra; + SvPV_set(av, (char*)AvALLOC(av)); } AvFILLp(av) = -1; @@ -476,29 +469,21 @@ Undefines the array. Frees the memory used by the array itself. void Perl_av_undef(pTHX_ register AV *av) { - register I32 key; - - if (!av) - return; - /*SUPPRESS 560*/ + assert(av); /* Give any tie a chance to cleanup first */ if (SvTIED_mg((SV*)av, PERL_MAGIC_tied)) av_fill(av, -1); /* mg_clear() ? */ if (AvREAL(av)) { - key = AvFILLp(av) + 1; + register I32 key = AvFILLp(av) + 1; while (key) SvREFCNT_dec(AvARRAY(av)[--key]); } Safefree(AvALLOC(av)); - AvALLOC(av) = 0; - SvPVX(av) = 0; + AvALLOC(av) = NULL; + SvPV_set(av, NULL); AvMAX(av) = AvFILLp(av) = -1; - if (AvARYLEN(av)) { - SvREFCNT_dec(AvARYLEN(av)); - AvARYLEN(av) = 0; - } } /* @@ -513,9 +498,10 @@ to accommodate the addition. void Perl_av_push(pTHX_ register AV *av, SV *val) { + dVAR; MAGIC *mg; - if (!av) - return; + assert(av); + if (SvREADONLY(av)) Perl_croak(aTHX_ PL_no_modify); @@ -548,11 +534,12 @@ is empty. SV * Perl_av_pop(pTHX_ register AV *av) { + dVAR; SV *retval; MAGIC* mg; - if (!av) - return &PL_sv_undef; + assert(av); + if (SvREADONLY(av)) Perl_croak(aTHX_ PL_no_modify); if ((mg = SvTIED_mg((SV*)av, PERL_MAGIC_tied))) { @@ -593,13 +580,12 @@ must then use C to assign values to these new elements. void Perl_av_unshift(pTHX_ register AV *av, register I32 num) { + dVAR; register I32 i; - register SV **ary; MAGIC* mg; - I32 slide; - if (!av) - return; + assert(av); + if (SvREADONLY(av)) Perl_croak(aTHX_ PL_no_modify); @@ -632,9 +618,11 @@ Perl_av_unshift(pTHX_ register AV *av, register I32 num) AvMAX(av) += i; AvFILLp(av) += i; - SvPVX(av) = (char*)(AvARRAY(av) - i); + SvPV_set(av, (char*)(AvARRAY(av) - i)); } if (num) { + register SV **ary; + I32 slide; i = AvFILLp(av); /* Create extra elements */ slide = i > 0 ? i : 0; @@ -649,7 +637,7 @@ Perl_av_unshift(pTHX_ register AV *av, register I32 num) /* Make extra elements into a buffer */ AvMAX(av) -= slide; AvFILLp(av) -= slide; - SvPVX(av) = (char*)(AvARRAY(av) + slide); + SvPV_set(av, (char*)(AvARRAY(av) + slide)); } } @@ -664,11 +652,12 @@ Shifts an SV off the beginning of the array. SV * Perl_av_shift(pTHX_ register AV *av) { + dVAR; SV *retval; MAGIC* mg; - if (!av) - return &PL_sv_undef; + assert(av); + if (SvREADONLY(av)) Perl_croak(aTHX_ PL_no_modify); if ((mg = SvTIED_mg((SV*)av, PERL_MAGIC_tied))) { @@ -692,7 +681,7 @@ Perl_av_shift(pTHX_ register AV *av) retval = *AvARRAY(av); if (AvREAL(av)) *AvARRAY(av) = &PL_sv_undef; - SvPVX(av) = (char*)(AvARRAY(av) + 1); + SvPV_set(av, (char*)(AvARRAY(av) + 1)); AvMAX(av)--; AvFILLp(av)--; if (SvSMAGICAL(av)) @@ -710,8 +699,9 @@ empty. */ I32 -Perl_av_len(pTHX_ register AV *av) +Perl_av_len(pTHX_ register const AV *av) { + assert(av); return AvFILL(av); } @@ -726,9 +716,11 @@ Perl's C<$#array = $fill;>. void Perl_av_fill(pTHX_ register AV *av, I32 fill) { + dVAR; MAGIC *mg; - if (!av) - Perl_croak(aTHX_ "panic: null array"); + + assert(av); + if (fill < 0) fill = -1; if ((mg = SvTIED_mg((SV*)av, PERL_MAGIC_tied))) { @@ -749,7 +741,7 @@ Perl_av_fill(pTHX_ register AV *av, I32 fill) } if (fill <= AvMAX(av)) { I32 key = AvFILLp(av); - SV** ary = AvARRAY(av); + SV** const ary = AvARRAY(av); if (AvREAL(av)) { while (key > fill) { @@ -774,29 +766,31 @@ Perl_av_fill(pTHX_ register AV *av, I32 fill) =for apidoc av_delete Deletes the element indexed by C from the array. Returns the -deleted element. C is currently ignored. +deleted element. If C equals C, the element is freed +and null is returned. =cut */ SV * Perl_av_delete(pTHX_ AV *av, I32 key, I32 flags) { + dVAR; SV *sv; - if (!av) - return Nullsv; + assert(av); + if (SvREADONLY(av)) Perl_croak(aTHX_ PL_no_modify); if (SvRMAGICAL(av)) { - MAGIC *tied_magic = mg_find((SV*)av, PERL_MAGIC_tied); - SV **svp; + const MAGIC * const tied_magic = mg_find((SV*)av, PERL_MAGIC_tied); if ((tied_magic || mg_find((SV*)av, PERL_MAGIC_regdata))) { /* Handle negative array indices 20020222 MJD */ + SV **svp; if (key < 0) { unsigned adjust_index = 1; if (tied_magic) { - SV **negative_indices_glob = + SV * const * const negative_indices_glob = hv_fetch(SvSTASH(SvRV(SvTIED_obj((SV *)av, tied_magic))), NEGATIVE_INDICES_VAR, 16, 0); @@ -807,7 +801,7 @@ Perl_av_delete(pTHX_ AV *av, I32 key, I32 flags) if (adjust_index) { key += AvFILL(av) + 1; if (key < 0) - return Nullsv; + return NULL; } } svp = av_fetch(av, key, TRUE); @@ -818,7 +812,7 @@ Perl_av_delete(pTHX_ AV *av, I32 key, I32 flags) sv_unmagic(sv, PERL_MAGIC_tiedelem); /* No longer an element */ return sv; } - return Nullsv; + return NULL; } } } @@ -826,12 +820,14 @@ Perl_av_delete(pTHX_ AV *av, I32 key, I32 flags) if (key < 0) { key += AvFILL(av) + 1; if (key < 0) - return Nullsv; + return NULL; } if (key > AvFILLp(av)) - return Nullsv; + return NULL; else { + if (!AvREAL(av) && AvREIFY(av)) + av_reify(av); sv = AvARRAY(av)[key]; if (key == AvFILLp(av)) { AvARRAY(av)[key] = &PL_sv_undef; @@ -846,8 +842,10 @@ Perl_av_delete(pTHX_ AV *av, I32 key, I32 flags) } if (flags & G_DISCARD) { SvREFCNT_dec(sv); - sv = Nullsv; + sv = NULL; } + else if (AvREAL(av)) + sv = sv_2mortal(sv); return sv; } @@ -864,20 +862,19 @@ C<&PL_sv_undef>. bool Perl_av_exists(pTHX_ AV *av, I32 key) { - if (!av) - return FALSE; - + dVAR; + assert(av); if (SvRMAGICAL(av)) { - MAGIC *tied_magic = mg_find((SV*)av, PERL_MAGIC_tied); + const MAGIC * const tied_magic = mg_find((SV*)av, PERL_MAGIC_tied); if (tied_magic || mg_find((SV*)av, PERL_MAGIC_regdata)) { - SV *sv = sv_newmortal(); + SV * const sv = sv_newmortal(); MAGIC *mg; /* Handle negative array indices 20020222 MJD */ if (key < 0) { unsigned adjust_index = 1; if (tied_magic) { - SV **negative_indices_glob = + SV * const * const negative_indices_glob = hv_fetch(SvSTASH(SvRV(SvTIED_obj((SV *)av, tied_magic))), NEGATIVE_INDICES_VAR, 16, 0); @@ -916,3 +913,32 @@ Perl_av_exists(pTHX_ AV *av, I32 key) else return FALSE; } + +SV ** +Perl_av_arylen_p(pTHX_ AV *av) { + dVAR; + MAGIC *mg; + + assert(av); + + mg = mg_find((SV*)av, PERL_MAGIC_arylen_p); + + if (!mg) { + mg = sv_magicext((SV*)av, 0, PERL_MAGIC_arylen_p, &PL_vtbl_arylen_p, + 0, 0); + assert(mg); + /* sv_magicext won't set this for us because we pass in a NULL obj */ + mg->mg_flags |= MGf_REFCOUNTED; + } + return &(mg->mg_obj); +} + +/* + * Local variables: + * c-indentation-style: bsd + * c-basic-offset: 4 + * indent-tabs-mode: t + * End: + * + * ex: set ts=8 sts=4 sw=4 noet: + */