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657 lines
12 KiB
C
657 lines
12 KiB
C
/* av.c
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*
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* Copyright (c) 1991-1999, Larry Wall
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*
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* You may distribute under the terms of either the GNU General Public
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* License or the Artistic License, as specified in the README file.
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*
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*/
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/*
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* "...for the Entwives desired order, and plenty, and peace (by which they
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* meant that things should remain where they had set them)." --Treebeard
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*/
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#include "EXTERN.h"
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#include "perl.h"
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void
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av_reify(AV *av)
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{
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I32 key;
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SV* sv;
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if (AvREAL(av))
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return;
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#ifdef DEBUGGING
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if (SvTIED_mg((SV*)av, 'P'))
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warn("av_reify called on tied array");
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#endif
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key = AvMAX(av) + 1;
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while (key > AvFILLp(av) + 1)
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AvARRAY(av)[--key] = &PL_sv_undef;
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while (key) {
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sv = AvARRAY(av)[--key];
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assert(sv);
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if (sv != &PL_sv_undef) {
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dTHR;
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(void)SvREFCNT_inc(sv);
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}
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}
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key = AvARRAY(av) - AvALLOC(av);
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while (key)
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AvALLOC(av)[--key] = &PL_sv_undef;
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AvREIFY_off(av);
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AvREAL_on(av);
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}
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void
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av_extend(AV *av, I32 key)
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{
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dTHR; /* only necessary if we have to extend stack */
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MAGIC *mg;
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if (mg = SvTIED_mg((SV*)av, 'P')) {
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dSP;
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ENTER;
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SAVETMPS;
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PUSHSTACKi(PERLSI_MAGIC);
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PUSHMARK(SP);
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EXTEND(SP,2);
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PUSHs(SvTIED_obj((SV*)av, mg));
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PUSHs(sv_2mortal(newSViv(key+1)));
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PUTBACK;
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perl_call_method("EXTEND", G_SCALAR|G_DISCARD);
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POPSTACK;
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FREETMPS;
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LEAVE;
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return;
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}
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if (key > AvMAX(av)) {
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SV** ary;
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I32 tmp;
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I32 newmax;
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if (AvALLOC(av) != AvARRAY(av)) {
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ary = AvALLOC(av) + AvFILLp(av) + 1;
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tmp = AvARRAY(av) - AvALLOC(av);
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Move(AvARRAY(av), AvALLOC(av), AvFILLp(av)+1, SV*);
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AvMAX(av) += tmp;
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SvPVX(av) = (char*)AvALLOC(av);
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if (AvREAL(av)) {
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while (tmp)
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ary[--tmp] = &PL_sv_undef;
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}
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if (key > AvMAX(av) - 10) {
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newmax = key + AvMAX(av);
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goto resize;
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}
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}
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else {
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if (AvALLOC(av)) {
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#ifndef STRANGE_MALLOC
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U32 bytes;
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#endif
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#if defined(MYMALLOC) && !defined(PURIFY) && !defined(LEAKTEST)
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newmax = malloced_size((void*)AvALLOC(av))/sizeof(SV*) - 1;
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if (key <= newmax)
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goto resized;
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#endif
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newmax = key + AvMAX(av) / 5;
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resize:
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#if defined(STRANGE_MALLOC) || defined(MYMALLOC)
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Renew(AvALLOC(av),newmax+1, SV*);
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#else
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bytes = (newmax + 1) * sizeof(SV*);
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#define MALLOC_OVERHEAD 16
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tmp = MALLOC_OVERHEAD;
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while (tmp - MALLOC_OVERHEAD < bytes)
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tmp += tmp;
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tmp -= MALLOC_OVERHEAD;
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tmp /= sizeof(SV*);
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assert(tmp > newmax);
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newmax = tmp - 1;
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New(2,ary, newmax+1, SV*);
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Copy(AvALLOC(av), ary, AvMAX(av)+1, SV*);
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if (AvMAX(av) > 64)
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offer_nice_chunk(AvALLOC(av), (AvMAX(av)+1) * sizeof(SV*));
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else
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Safefree(AvALLOC(av));
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AvALLOC(av) = ary;
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#endif
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resized:
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ary = AvALLOC(av) + AvMAX(av) + 1;
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tmp = newmax - AvMAX(av);
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if (av == PL_curstack) { /* Oops, grew stack (via av_store()?) */
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PL_stack_sp = AvALLOC(av) + (PL_stack_sp - PL_stack_base);
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PL_stack_base = AvALLOC(av);
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PL_stack_max = PL_stack_base + newmax;
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}
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}
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else {
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newmax = key < 3 ? 3 : key;
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New(2,AvALLOC(av), newmax+1, SV*);
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ary = AvALLOC(av) + 1;
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tmp = newmax;
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AvALLOC(av)[0] = &PL_sv_undef; /* For the stacks */
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}
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if (AvREAL(av)) {
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while (tmp)
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ary[--tmp] = &PL_sv_undef;
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}
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SvPVX(av) = (char*)AvALLOC(av);
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AvMAX(av) = newmax;
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}
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}
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}
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SV**
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av_fetch(register AV *av, I32 key, I32 lval)
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{
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SV *sv;
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if (!av)
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return 0;
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if (key < 0) {
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key += AvFILL(av) + 1;
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if (key < 0)
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return 0;
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}
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if (SvRMAGICAL(av)) {
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if (mg_find((SV*)av,'P')) {
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dTHR;
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sv = sv_newmortal();
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mg_copy((SV*)av, sv, 0, key);
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PL_av_fetch_sv = sv;
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return &PL_av_fetch_sv;
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}
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}
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if (key > AvFILLp(av)) {
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if (!lval)
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return 0;
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sv = NEWSV(5,0);
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return av_store(av,key,sv);
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}
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if (AvARRAY(av)[key] == &PL_sv_undef) {
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emptyness:
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if (lval) {
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sv = NEWSV(6,0);
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return av_store(av,key,sv);
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}
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return 0;
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}
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else if (AvREIFY(av)
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&& (!AvARRAY(av)[key] /* eg. @_ could have freed elts */
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|| SvTYPE(AvARRAY(av)[key]) == SVTYPEMASK)) {
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AvARRAY(av)[key] = &PL_sv_undef; /* 1/2 reify */
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goto emptyness;
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}
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return &AvARRAY(av)[key];
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}
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SV**
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av_store(register AV *av, I32 key, SV *val)
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{
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SV** ary;
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U32 fill;
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if (!av)
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return 0;
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if (!val)
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val = &PL_sv_undef;
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if (key < 0) {
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key += AvFILL(av) + 1;
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if (key < 0)
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return 0;
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}
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if (SvREADONLY(av) && key >= AvFILL(av))
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croak(no_modify);
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if (SvRMAGICAL(av)) {
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if (mg_find((SV*)av,'P')) {
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if (val != &PL_sv_undef) {
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mg_copy((SV*)av, val, 0, key);
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}
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return 0;
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}
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}
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if (!AvREAL(av) && AvREIFY(av))
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av_reify(av);
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if (key > AvMAX(av))
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av_extend(av,key);
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ary = AvARRAY(av);
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if (AvFILLp(av) < key) {
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if (!AvREAL(av)) {
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dTHR;
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if (av == PL_curstack && key > PL_stack_sp - PL_stack_base)
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PL_stack_sp = PL_stack_base + key; /* XPUSH in disguise */
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do
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ary[++AvFILLp(av)] = &PL_sv_undef;
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while (AvFILLp(av) < key);
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}
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AvFILLp(av) = key;
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}
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else if (AvREAL(av))
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SvREFCNT_dec(ary[key]);
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ary[key] = val;
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if (SvSMAGICAL(av)) {
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if (val != &PL_sv_undef) {
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MAGIC* mg = SvMAGIC(av);
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sv_magic(val, (SV*)av, toLOWER(mg->mg_type), 0, key);
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}
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mg_set((SV*)av);
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}
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return &ary[key];
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}
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AV *
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newAV(void)
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{
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register AV *av;
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av = (AV*)NEWSV(3,0);
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sv_upgrade((SV *)av, SVt_PVAV);
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AvREAL_on(av);
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AvALLOC(av) = 0;
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SvPVX(av) = 0;
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AvMAX(av) = AvFILLp(av) = -1;
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return av;
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}
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AV *
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av_make(register I32 size, register SV **strp)
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{
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register AV *av;
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register I32 i;
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register SV** ary;
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av = (AV*)NEWSV(8,0);
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sv_upgrade((SV *) av,SVt_PVAV);
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AvFLAGS(av) = AVf_REAL;
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if (size) { /* `defined' was returning undef for size==0 anyway. */
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New(4,ary,size,SV*);
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AvALLOC(av) = ary;
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SvPVX(av) = (char*)ary;
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AvFILLp(av) = size - 1;
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AvMAX(av) = size - 1;
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for (i = 0; i < size; i++) {
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assert (*strp);
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ary[i] = NEWSV(7,0);
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sv_setsv(ary[i], *strp);
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strp++;
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}
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}
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return av;
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}
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AV *
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av_fake(register I32 size, register SV **strp)
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{
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register AV *av;
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register SV** ary;
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av = (AV*)NEWSV(9,0);
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sv_upgrade((SV *)av, SVt_PVAV);
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New(4,ary,size+1,SV*);
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AvALLOC(av) = ary;
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Copy(strp,ary,size,SV*);
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AvFLAGS(av) = AVf_REIFY;
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SvPVX(av) = (char*)ary;
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AvFILLp(av) = size - 1;
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AvMAX(av) = size - 1;
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while (size--) {
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assert (*strp);
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SvTEMP_off(*strp);
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strp++;
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}
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return av;
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}
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void
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av_clear(register AV *av)
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{
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register I32 key;
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SV** ary;
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#ifdef DEBUGGING
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if (SvREFCNT(av) <= 0) {
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warn("Attempt to clear deleted array");
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}
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#endif
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if (!av)
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return;
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/*SUPPRESS 560*/
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if (SvREADONLY(av))
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croak(no_modify);
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/* Give any tie a chance to cleanup first */
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if (SvRMAGICAL(av))
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mg_clear((SV*)av);
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if (AvMAX(av) < 0)
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return;
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if (AvREAL(av)) {
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ary = AvARRAY(av);
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key = AvFILLp(av) + 1;
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while (key) {
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SvREFCNT_dec(ary[--key]);
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ary[key] = &PL_sv_undef;
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}
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}
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if (key = AvARRAY(av) - AvALLOC(av)) {
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AvMAX(av) += key;
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SvPVX(av) = (char*)AvALLOC(av);
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}
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AvFILLp(av) = -1;
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}
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void
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av_undef(register AV *av)
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{
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register I32 key;
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if (!av)
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return;
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/*SUPPRESS 560*/
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/* Give any tie a chance to cleanup first */
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if (SvTIED_mg((SV*)av, 'P'))
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av_fill(av, -1); /* mg_clear() ? */
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if (AvREAL(av)) {
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key = AvFILLp(av) + 1;
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while (key)
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SvREFCNT_dec(AvARRAY(av)[--key]);
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}
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Safefree(AvALLOC(av));
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AvALLOC(av) = 0;
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SvPVX(av) = 0;
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AvMAX(av) = AvFILLp(av) = -1;
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if (AvARYLEN(av)) {
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SvREFCNT_dec(AvARYLEN(av));
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AvARYLEN(av) = 0;
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}
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}
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void
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av_push(register AV *av, SV *val)
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{
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MAGIC *mg;
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if (!av)
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return;
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if (SvREADONLY(av))
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croak(no_modify);
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if (mg = SvTIED_mg((SV*)av, 'P')) {
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dSP;
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PUSHSTACKi(PERLSI_MAGIC);
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PUSHMARK(SP);
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EXTEND(SP,2);
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PUSHs(SvTIED_obj((SV*)av, mg));
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PUSHs(val);
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PUTBACK;
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ENTER;
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perl_call_method("PUSH", G_SCALAR|G_DISCARD);
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LEAVE;
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POPSTACK;
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return;
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}
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av_store(av,AvFILLp(av)+1,val);
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}
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SV *
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av_pop(register AV *av)
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{
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SV *retval;
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MAGIC* mg;
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if (!av || AvFILL(av) < 0)
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return &PL_sv_undef;
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if (SvREADONLY(av))
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croak(no_modify);
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if (mg = SvTIED_mg((SV*)av, 'P')) {
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dSP;
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PUSHSTACKi(PERLSI_MAGIC);
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PUSHMARK(SP);
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XPUSHs(SvTIED_obj((SV*)av, mg));
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PUTBACK;
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ENTER;
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if (perl_call_method("POP", G_SCALAR)) {
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retval = newSVsv(*PL_stack_sp--);
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} else {
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retval = &PL_sv_undef;
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}
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LEAVE;
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POPSTACK;
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return retval;
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}
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retval = AvARRAY(av)[AvFILLp(av)];
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AvARRAY(av)[AvFILLp(av)--] = &PL_sv_undef;
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if (SvSMAGICAL(av))
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mg_set((SV*)av);
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return retval;
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}
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void
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av_unshift(register AV *av, register I32 num)
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{
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register I32 i;
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register SV **ary;
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MAGIC* mg;
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if (!av || num <= 0)
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return;
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if (SvREADONLY(av))
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croak(no_modify);
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if (mg = SvTIED_mg((SV*)av, 'P')) {
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dSP;
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PUSHSTACKi(PERLSI_MAGIC);
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PUSHMARK(SP);
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EXTEND(SP,1+num);
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PUSHs(SvTIED_obj((SV*)av, mg));
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while (num-- > 0) {
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PUSHs(&PL_sv_undef);
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}
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PUTBACK;
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ENTER;
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perl_call_method("UNSHIFT", G_SCALAR|G_DISCARD);
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LEAVE;
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POPSTACK;
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return;
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}
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if (!AvREAL(av) && AvREIFY(av))
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av_reify(av);
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i = AvARRAY(av) - AvALLOC(av);
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if (i) {
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if (i > num)
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i = num;
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num -= i;
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AvMAX(av) += i;
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AvFILLp(av) += i;
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SvPVX(av) = (char*)(AvARRAY(av) - i);
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}
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if (num) {
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i = AvFILLp(av);
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av_extend(av, i + num);
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AvFILLp(av) += num;
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ary = AvARRAY(av);
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Move(ary, ary + num, i + 1, SV*);
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do {
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ary[--num] = &PL_sv_undef;
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} while (num);
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}
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}
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SV *
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av_shift(register AV *av)
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{
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SV *retval;
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MAGIC* mg;
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if (!av || AvFILL(av) < 0)
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return &PL_sv_undef;
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if (SvREADONLY(av))
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croak(no_modify);
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if (mg = SvTIED_mg((SV*)av, 'P')) {
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dSP;
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PUSHSTACKi(PERLSI_MAGIC);
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PUSHMARK(SP);
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XPUSHs(SvTIED_obj((SV*)av, mg));
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PUTBACK;
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ENTER;
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if (perl_call_method("SHIFT", G_SCALAR)) {
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retval = newSVsv(*PL_stack_sp--);
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} else {
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retval = &PL_sv_undef;
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}
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LEAVE;
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POPSTACK;
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return retval;
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}
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retval = *AvARRAY(av);
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if (AvREAL(av))
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*AvARRAY(av) = &PL_sv_undef;
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SvPVX(av) = (char*)(AvARRAY(av) + 1);
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AvMAX(av)--;
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AvFILLp(av)--;
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if (SvSMAGICAL(av))
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mg_set((SV*)av);
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return retval;
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}
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I32
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av_len(register AV *av)
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{
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return AvFILL(av);
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}
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void
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av_fill(register AV *av, I32 fill)
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{
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MAGIC *mg;
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if (!av)
|
|
croak("panic: null array");
|
|
if (fill < 0)
|
|
fill = -1;
|
|
if (mg = SvTIED_mg((SV*)av, 'P')) {
|
|
dSP;
|
|
ENTER;
|
|
SAVETMPS;
|
|
PUSHSTACKi(PERLSI_MAGIC);
|
|
PUSHMARK(SP);
|
|
EXTEND(SP,2);
|
|
PUSHs(SvTIED_obj((SV*)av, mg));
|
|
PUSHs(sv_2mortal(newSViv(fill+1)));
|
|
PUTBACK;
|
|
perl_call_method("STORESIZE", G_SCALAR|G_DISCARD);
|
|
POPSTACK;
|
|
FREETMPS;
|
|
LEAVE;
|
|
return;
|
|
}
|
|
if (fill <= AvMAX(av)) {
|
|
I32 key = AvFILLp(av);
|
|
SV** ary = AvARRAY(av);
|
|
|
|
if (AvREAL(av)) {
|
|
while (key > fill) {
|
|
SvREFCNT_dec(ary[key]);
|
|
ary[key--] = &PL_sv_undef;
|
|
}
|
|
}
|
|
else {
|
|
while (key < fill)
|
|
ary[++key] = &PL_sv_undef;
|
|
}
|
|
|
|
AvFILLp(av) = fill;
|
|
if (SvSMAGICAL(av))
|
|
mg_set((SV*)av);
|
|
}
|
|
else
|
|
(void)av_store(av,fill,&PL_sv_undef);
|
|
}
|
|
|
|
|
|
/* AVHV: Support for treating arrays as if they were hashes. The
|
|
* first element of the array should be a hash reference that maps
|
|
* hash keys to array indices.
|
|
*/
|
|
|
|
STATIC I32
|
|
avhv_index_sv(SV* sv)
|
|
{
|
|
I32 index = SvIV(sv);
|
|
if (index < 1)
|
|
croak("Bad index while coercing array into hash");
|
|
return index;
|
|
}
|
|
|
|
HV*
|
|
avhv_keys(AV *av)
|
|
{
|
|
SV **keysp = av_fetch(av, 0, FALSE);
|
|
if (keysp) {
|
|
SV *sv = *keysp;
|
|
if (SvGMAGICAL(sv))
|
|
mg_get(sv);
|
|
if (SvROK(sv)) {
|
|
sv = SvRV(sv);
|
|
if (SvTYPE(sv) == SVt_PVHV)
|
|
return (HV*)sv;
|
|
}
|
|
}
|
|
croak("Can't coerce array into hash");
|
|
return Nullhv;
|
|
}
|
|
|
|
SV**
|
|
avhv_fetch_ent(AV *av, SV *keysv, I32 lval, U32 hash)
|
|
{
|
|
SV **indsvp;
|
|
HV *keys = avhv_keys(av);
|
|
HE *he;
|
|
|
|
he = hv_fetch_ent(keys, keysv, FALSE, hash);
|
|
if (!he)
|
|
croak("No such array field");
|
|
return av_fetch(av, avhv_index_sv(HeVAL(he)), lval);
|
|
}
|
|
|
|
bool
|
|
avhv_exists_ent(AV *av, SV *keysv, U32 hash)
|
|
{
|
|
HV *keys = avhv_keys(av);
|
|
return hv_exists_ent(keys, keysv, hash);
|
|
}
|
|
|
|
HE *
|
|
avhv_iternext(AV *av)
|
|
{
|
|
HV *keys = avhv_keys(av);
|
|
return hv_iternext(keys);
|
|
}
|
|
|
|
SV *
|
|
avhv_iterval(AV *av, register HE *entry)
|
|
{
|
|
SV *sv = hv_iterval(avhv_keys(av), entry);
|
|
return *av_fetch(av, avhv_index_sv(sv), TRUE);
|
|
}
|