3 * Copyright (c) 1991-1997, Larry Wall
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
11 * "For the fashion of Minas Tirith was such that it was built on seven
25 av_extend(curstack, (p - stack_base) + (n) + 128);
32 cxstack_max = cxstack_max * 3 / 2;
33 Renew(cxstack, cxstack_max + 1, CONTEXT); /* XXX should fix CXINC macro */
34 return cxstack_ix + 1;
41 if (retstack_ix == retstack_max) {
42 retstack_max = retstack_max * 3 / 2;
43 Renew(retstack, retstack_max, OP*);
45 retstack[retstack_ix++] = retop;
52 return retstack[--retstack_ix];
60 if (scopestack_ix == scopestack_max) {
61 scopestack_max = scopestack_max * 3 / 2;
62 Renew(scopestack, scopestack_max, I32);
64 scopestack[scopestack_ix++] = savestack_ix;
71 I32 oldsave = scopestack[--scopestack_ix];
78 I32 oldmax = markstack_max - markstack;
79 I32 newmax = oldmax * 3 / 2;
81 Renew(markstack, newmax, I32);
82 markstack_ptr = markstack + oldmax;
83 markstack_max = markstack + newmax;
89 savestack_max = savestack_max * 3 / 2;
90 Renew(savestack, savestack_max, ANY);
96 /* XXX should tmps_floor live in cxstack? */
97 I32 myfloor = tmps_floor;
98 while (tmps_ix > myfloor) { /* clean up after last statement */
99 SV* sv = tmps_stack[tmps_ix];
100 tmps_stack[tmps_ix--] = Nullsv;
105 SvREFCNT_dec(sv); /* note, can modify tmps_ix!!! */
117 sv = *sptr = NEWSV(0,0);
118 if (SvTYPE(osv) >= SVt_PVMG && SvMAGIC(osv) && SvTYPE(osv) != SVt_PVGV) {
119 sv_upgrade(sv, SvTYPE(osv));
120 if (SvGMAGICAL(osv)) {
122 bool oldtainted = tainted;
124 if (tainting && tainted && (mg = mg_find(osv, 't'))) {
125 SAVESPTR(mg->mg_obj);
128 SvFLAGS(osv) |= (SvFLAGS(osv) &
129 (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
130 tainted = oldtainted;
132 SvMAGIC(sv) = SvMAGIC(osv);
133 SvFLAGS(sv) |= SvMAGICAL(osv);
149 return save_scalar_at(&GvSV(gv));
159 SSPUSHINT(SAVEt_SVREF);
160 return save_scalar_at(sptr);
169 SSPUSHIV((IV)SvLEN(gv));
170 SvLEN(gv) = 0; /* forget that anything was allocated here */
171 SSPUSHIV((IV)SvCUR(gv));
172 SSPUSHPTR(SvPVX(gv));
174 SSPUSHPTR(SvREFCNT_inc(gv));
180 Newz(602, gp, 1, GP);
181 GvGP(gv) = gp_ref(gp);
182 GvSV(gv) = NEWSV(72,0);
183 GvLINE(gv) = curcop->cop_line;
200 SSPUSHPTR(oav = GvAVn(gv));
203 GvAV(gv) = Null(AV*);
206 SvMAGIC(av) = SvMAGIC(oav);
207 SvFLAGS(av) |= SvMAGICAL(oav);
225 SSPUSHPTR(ohv = GvHVn(gv));
228 GvHV(gv) = Null(HV*);
231 SvMAGIC(hv) = SvMAGIC(ohv);
232 SvFLAGS(hv) |= SvMAGICAL(ohv);
249 SSPUSHPTR(item); /* remember the pointer */
252 SSPUSHPTR(sv); /* remember the value */
253 SSPUSHINT(SAVEt_ITEM);
263 SSPUSHINT(SAVEt_INT);
273 SSPUSHINT(SAVEt_LONG);
283 SSPUSHINT(SAVEt_I32);
293 SSPUSHINT(SAVEt_I16);
306 /* Cannot use save_sptr() to store a char* since the SV** cast will
307 * force word-alignment and we'll miss the pointer.
316 SSPUSHINT(SAVEt_PPTR);
326 SSPUSHINT(SAVEt_SPTR);
335 SSPUSHINT(SAVEt_NSTAB);
345 SSPUSHINT(SAVEt_HPTR);
355 SSPUSHINT(SAVEt_APTR);
364 SSPUSHINT(SAVEt_FREESV);
373 SSPUSHINT(SAVEt_FREEOP);
382 SSPUSHINT(SAVEt_FREEPV);
390 SSPUSHLONG((long)(svp-curpad));
391 SSPUSHINT(SAVEt_CLEARSV);
395 save_delete(hv,key,klen)
404 SSPUSHINT(SAVEt_DELETE);
408 save_list(sarg,maxsarg)
415 SSCHECK(3 * maxsarg);
416 for (i = 1; i <= maxsarg; i++) {
417 SSPUSHPTR(sarg[i]); /* remember the pointer */
419 sv_setsv(sv,sarg[i]);
420 SSPUSHPTR(sv); /* remember the value */
421 SSPUSHINT(SAVEt_ITEM);
427 void (*f) _((void*));
433 SSPUSHINT(SAVEt_DESTRUCTOR);
448 croak("panic: corrupt saved stack index");
449 while (savestack_ix > base) {
451 case SAVEt_ITEM: /* normal string */
452 value = (SV*)SSPOPPTR;
454 sv_replace(sv,value);
459 case SAVEt_SV: /* scalar reference */
460 value = (SV*)SSPOPPTR;
464 case SAVEt_SVREF: /* scalar reference */
465 value = (SV*)SSPOPPTR;
469 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv) &&
470 SvTYPE(sv) != SVt_PVGV)
472 (void)SvUPGRADE(value, SvTYPE(sv));
473 SvMAGIC(value) = SvMAGIC(sv);
474 SvFLAGS(value) |= SvMAGICAL(sv);
478 else if (SvTYPE(value) >= SVt_PVMG && SvMAGIC(value) &&
479 SvTYPE(value) != SVt_PVGV)
481 SvFLAGS(value) |= (SvFLAGS(value) &
482 (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
483 SvMAGICAL_off(value);
492 case SAVEt_AV: /* array reference */
496 AV *goner = GvAV(gv);
497 SvMAGIC(av) = SvMAGIC(goner);
498 SvFLAGS(av) |= SvMAGICAL(goner);
499 SvMAGICAL_off(goner);
510 case SAVEt_HV: /* hash reference */
514 HV *goner = GvHV(gv);
515 SvMAGIC(hv) = SvMAGIC(goner);
516 SvFLAGS(hv) |= SvMAGICAL(goner);
517 SvMAGICAL_off(goner);
528 case SAVEt_INT: /* int reference */
530 *(int*)ptr = (int)SSPOPINT;
532 case SAVEt_LONG: /* long reference */
534 *(long*)ptr = (long)SSPOPLONG;
536 case SAVEt_I32: /* I32 reference */
538 *(I32*)ptr = (I32)SSPOPINT;
540 case SAVEt_I16: /* I16 reference */
542 *(I16*)ptr = (I16)SSPOPINT;
544 case SAVEt_IV: /* IV reference */
546 *(IV*)ptr = (IV)SSPOPIV;
548 case SAVEt_SPTR: /* SV* reference */
550 *(SV**)ptr = (SV*)SSPOPPTR;
552 case SAVEt_PPTR: /* char* reference */
554 *(char**)ptr = (char*)SSPOPPTR;
556 case SAVEt_HPTR: /* HV* reference */
558 *(HV**)ptr = (HV*)SSPOPPTR;
560 case SAVEt_APTR: /* AV* reference */
562 *(AV**)ptr = (AV*)SSPOPPTR;
566 (void)sv_clear((SV*)gv);
568 case SAVEt_GP: /* scalar reference */
573 if (SvPOK(gv) && SvLEN(gv) > 0) {
576 SvPVX(gv) = (char *)SSPOPPTR;
577 SvCUR(gv) = (STRLEN)SSPOPIV;
578 SvLEN(gv) = (STRLEN)SSPOPIV;
583 SvREFCNT_dec((SV*)ptr);
588 curpad = AvARRAY(comppad);
593 Safefree((char*)ptr);
596 ptr = (void*)&curpad[SSPOPLONG];
598 /* Can clear pad variable in place? */
599 if (SvREFCNT(sv) <= 1 && !SvOBJECT(sv)) {
600 if (SvTHINKFIRST(sv)) {
602 croak("panic: leave_scope clearsv");
609 switch (SvTYPE(sv)) {
619 croak("panic: leave_scope pad code");
631 else { /* Someone has a claim on this, so abandon it. */
632 U32 padflags = SvFLAGS(sv) & (SVs_PADBUSY|SVs_PADMY|SVs_PADTMP);
633 SvREFCNT_dec(sv); /* Cast current value to the winds. */
634 switch (SvTYPE(sv)) { /* Console ourselves with a new value */
635 case SVt_PVAV: *(SV**)ptr = (SV*)newAV(); break;
636 case SVt_PVHV: *(SV**)ptr = (SV*)newHV(); break;
637 default: *(SV**)ptr = NEWSV(0,0); break;
639 SvFLAGS(*(SV**)ptr) |= padflags; /* preserve pad nature */
646 (void)hv_delete(hv, (char*)ptr, (U32)SSPOPINT, G_DISCARD);
649 case SAVEt_DESTRUCTOR:
653 case SAVEt_REGCONTEXT:
655 I32 delta = SSPOPINT;
656 savestack_ix -= delta; /* regexp must have croaked */
659 case SAVEt_STACK_POS: /* Position on Perl stack */
661 I32 delta = SSPOPINT;
662 stack_sp = stack_base + delta;
666 croak("panic: leave_scope inconsistency");
677 PerlIO_printf(Perl_debug_log, "CX %ld = %s\n", (long)(cx - cxstack), block_type[cx->cx_type]);
678 if (cx->cx_type != CXt_SUBST) {
679 PerlIO_printf(Perl_debug_log, "BLK_OLDSP = %ld\n", (long)cx->blk_oldsp);
680 PerlIO_printf(Perl_debug_log, "BLK_OLDCOP = 0x%lx\n", (long)cx->blk_oldcop);
681 PerlIO_printf(Perl_debug_log, "BLK_OLDMARKSP = %ld\n", (long)cx->blk_oldmarksp);
682 PerlIO_printf(Perl_debug_log, "BLK_OLDSCOPESP = %ld\n", (long)cx->blk_oldscopesp);
683 PerlIO_printf(Perl_debug_log, "BLK_OLDRETSP = %ld\n", (long)cx->blk_oldretsp);
684 PerlIO_printf(Perl_debug_log, "BLK_OLDPM = 0x%lx\n", (long)cx->blk_oldpm);
685 PerlIO_printf(Perl_debug_log, "BLK_GIMME = %s\n", cx->blk_gimme ? "LIST" : "SCALAR");
687 switch (cx->cx_type) {
692 PerlIO_printf(Perl_debug_log, "BLK_SUB.CV = 0x%lx\n",
693 (long)cx->blk_sub.cv);
694 PerlIO_printf(Perl_debug_log, "BLK_SUB.GV = 0x%lx\n",
695 (long)cx->blk_sub.gv);
696 PerlIO_printf(Perl_debug_log, "BLK_SUB.DFOUTGV = 0x%lx\n",
697 (long)cx->blk_sub.dfoutgv);
698 PerlIO_printf(Perl_debug_log, "BLK_SUB.OLDDEPTH = %ld\n",
699 (long)cx->blk_sub.olddepth);
700 PerlIO_printf(Perl_debug_log, "BLK_SUB.HASARGS = %d\n",
701 (int)cx->blk_sub.hasargs);
704 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_IN_EVAL = %ld\n",
705 (long)cx->blk_eval.old_in_eval);
706 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_OP_TYPE = %s (%s)\n",
707 op_name[cx->blk_eval.old_op_type],
708 op_desc[cx->blk_eval.old_op_type]);
709 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_NAME = %s\n",
710 cx->blk_eval.old_name);
711 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_EVAL_ROOT = 0x%lx\n",
712 (long)cx->blk_eval.old_eval_root);
716 PerlIO_printf(Perl_debug_log, "BLK_LOOP.LABEL = %s\n",
718 PerlIO_printf(Perl_debug_log, "BLK_LOOP.RESETSP = %ld\n",
719 (long)cx->blk_loop.resetsp);
720 PerlIO_printf(Perl_debug_log, "BLK_LOOP.REDO_OP = 0x%lx\n",
721 (long)cx->blk_loop.redo_op);
722 PerlIO_printf(Perl_debug_log, "BLK_LOOP.NEXT_OP = 0x%lx\n",
723 (long)cx->blk_loop.next_op);
724 PerlIO_printf(Perl_debug_log, "BLK_LOOP.LAST_OP = 0x%lx\n",
725 (long)cx->blk_loop.last_op);
726 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERIX = %ld\n",
727 (long)cx->blk_loop.iterix);
728 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERARY = 0x%lx\n",
729 (long)cx->blk_loop.iterary);
730 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERVAR = 0x%lx\n",
731 (long)cx->blk_loop.itervar);
732 if (cx->blk_loop.itervar)
733 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERSAVE = 0x%lx\n",
734 (long)cx->blk_loop.itersave);
735 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERLVAL = 0x%lx\n",
736 (long)cx->blk_loop.iterlval);
740 PerlIO_printf(Perl_debug_log, "SB_ITERS = %ld\n",
742 PerlIO_printf(Perl_debug_log, "SB_MAXITERS = %ld\n",
743 (long)cx->sb_maxiters);
744 PerlIO_printf(Perl_debug_log, "SB_SAFEBASE = %ld\n",
745 (long)cx->sb_safebase);
746 PerlIO_printf(Perl_debug_log, "SB_ONCE = %ld\n",
748 PerlIO_printf(Perl_debug_log, "SB_ORIG = %s\n",
750 PerlIO_printf(Perl_debug_log, "SB_DSTR = 0x%lx\n",
752 PerlIO_printf(Perl_debug_log, "SB_TARG = 0x%lx\n",
754 PerlIO_printf(Perl_debug_log, "SB_S = 0x%lx\n",
756 PerlIO_printf(Perl_debug_log, "SB_M = 0x%lx\n",
758 PerlIO_printf(Perl_debug_log, "SB_STREND = 0x%lx\n",
759 (long)cx->sb_strend);
760 PerlIO_printf(Perl_debug_log, "SB_RXRES = 0x%lx\n",