3 * Copyright (c) 1991-1994, 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 SSPUSHPTR(SvREFCNT_inc(gv));
175 Newz(602, gp, 1, GP);
178 GvSV(gv) = NEWSV(72,0);
179 GvLINE(gv) = curcop->cop_line;
183 GvGP(gv)->gp_refcnt++;
194 SSPUSHPTR(GvAVn(gv));
197 GvAV(gv) = Null(AV*);
207 SSPUSHPTR(GvHVn(gv));
210 GvHV(gv) = Null(HV*);
221 SSPUSHPTR(item); /* remember the pointer */
224 SSPUSHPTR(sv); /* remember the value */
225 SSPUSHINT(SAVEt_ITEM);
235 SSPUSHINT(SAVEt_INT);
245 SSPUSHINT(SAVEt_LONG);
255 SSPUSHINT(SAVEt_I32);
265 SSPUSHINT(SAVEt_I16);
278 /* Cannot use save_sptr() to store a char* since the SV** cast will
279 * force word-alignment and we'll miss the pointer.
288 SSPUSHINT(SAVEt_PPTR);
298 SSPUSHINT(SAVEt_SPTR);
307 SSPUSHINT(SAVEt_NSTAB);
317 SSPUSHINT(SAVEt_HPTR);
327 SSPUSHINT(SAVEt_APTR);
336 SSPUSHINT(SAVEt_FREESV);
345 SSPUSHINT(SAVEt_FREEOP);
354 SSPUSHINT(SAVEt_FREEPV);
362 SSPUSHLONG((long)(svp-curpad));
363 SSPUSHINT(SAVEt_CLEARSV);
367 save_delete(hv,key,klen)
376 SSPUSHINT(SAVEt_DELETE);
380 save_list(sarg,maxsarg)
387 SSCHECK(3 * maxsarg);
388 for (i = 1; i <= maxsarg; i++) {
389 SSPUSHPTR(sarg[i]); /* remember the pointer */
391 sv_setsv(sv,sarg[i]);
392 SSPUSHPTR(sv); /* remember the value */
393 SSPUSHINT(SAVEt_ITEM);
399 void (*f) _((void*));
405 SSPUSHINT(SAVEt_DESTRUCTOR);
420 croak("panic: corrupt saved stack index");
421 while (savestack_ix > base) {
423 case SAVEt_ITEM: /* normal string */
424 value = (SV*)SSPOPPTR;
426 sv_replace(sv,value);
431 case SAVEt_SV: /* scalar reference */
432 value = (SV*)SSPOPPTR;
436 case SAVEt_SVREF: /* scalar reference */
437 value = (SV*)SSPOPPTR;
441 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv) &&
442 SvTYPE(sv) != SVt_PVGV)
444 (void)SvUPGRADE(value, SvTYPE(sv));
445 SvMAGIC(value) = SvMAGIC(sv);
446 SvFLAGS(value) |= SvMAGICAL(sv);
450 else if (SvTYPE(value) >= SVt_PVMG && SvMAGIC(value) &&
451 SvTYPE(value) != SVt_PVGV)
453 SvFLAGS(value) |= (SvFLAGS(value) &
454 (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
455 SvMAGICAL_off(value);
464 case SAVEt_AV: /* array reference */
467 SvREFCNT_dec(GvAV(gv));
470 case SAVEt_HV: /* hash reference */
473 SvREFCNT_dec(GvHV(gv));
476 case SAVEt_INT: /* int reference */
478 *(int*)ptr = (int)SSPOPINT;
480 case SAVEt_LONG: /* long reference */
482 *(long*)ptr = (long)SSPOPLONG;
484 case SAVEt_I32: /* I32 reference */
486 *(I32*)ptr = (I32)SSPOPINT;
488 case SAVEt_I16: /* I16 reference */
490 *(I16*)ptr = (I16)SSPOPINT;
492 case SAVEt_IV: /* IV reference */
494 *(IV*)ptr = (IV)SSPOPIV;
496 case SAVEt_SPTR: /* SV* reference */
498 *(SV**)ptr = (SV*)SSPOPPTR;
500 case SAVEt_PPTR: /* char* reference */
502 *(char**)ptr = (char*)SSPOPPTR;
504 case SAVEt_HPTR: /* HV* reference */
506 *(HV**)ptr = (HV*)SSPOPPTR;
508 case SAVEt_APTR: /* AV* reference */
510 *(AV**)ptr = (AV*)SSPOPPTR;
514 (void)sv_clear((SV*)gv);
516 case SAVEt_GP: /* scalar reference */
525 SvREFCNT_dec((SV*)ptr);
529 curpad = AvARRAY(comppad);
534 Safefree((char*)ptr);
537 ptr = (void*)&curpad[SSPOPLONG];
539 if (SvREFCNT(sv) <= 1) { /* Can clear pad variable in place. */
540 if (SvTHINKFIRST(sv)) {
542 croak("panic: leave_scope clearsv");
549 switch (SvTYPE(sv)) {
563 if (SvPOK(sv) && SvLEN(sv))
569 else { /* Someone has a claim on this, so abandon it. */
570 U32 padflags = SvFLAGS(sv) & (SVs_PADBUSY|SVs_PADMY|SVs_PADTMP);
571 SvREFCNT_dec(sv); /* Cast current value to the winds. */
572 switch (SvTYPE(sv)) { /* Console ourselves with a new value */
573 case SVt_PVAV: *(SV**)ptr = (SV*)newAV(); break;
574 case SVt_PVHV: *(SV**)ptr = (SV*)newHV(); break;
575 default: *(SV**)ptr = NEWSV(0,0); break;
577 SvFLAGS(*(SV**)ptr) |= padflags; /* preserve pad nature */
584 (void)hv_delete(hv, (char*)ptr, (U32)SSPOPINT, G_DISCARD);
587 case SAVEt_DESTRUCTOR:
591 case SAVEt_REGCONTEXT:
593 I32 delta = SSPOPINT;
594 savestack_ix -= delta; /* regexp must have croaked */
597 case SAVEt_STACK_POS: /* Position on Perl stack */
599 I32 delta = SSPOPINT;
600 stack_sp = stack_base + delta;
604 croak("panic: leave_scope inconsistency");
615 PerlIO_printf(Perl_debug_log, "CX %d = %s\n", cx - cxstack, block_type[cx->cx_type]);
616 if (cx->cx_type != CXt_SUBST) {
617 PerlIO_printf(Perl_debug_log, "BLK_OLDSP = %ld\n", (long)cx->blk_oldsp);
618 PerlIO_printf(Perl_debug_log, "BLK_OLDCOP = 0x%lx\n", (long)cx->blk_oldcop);
619 PerlIO_printf(Perl_debug_log, "BLK_OLDMARKSP = %ld\n", (long)cx->blk_oldmarksp);
620 PerlIO_printf(Perl_debug_log, "BLK_OLDSCOPESP = %ld\n", (long)cx->blk_oldscopesp);
621 PerlIO_printf(Perl_debug_log, "BLK_OLDRETSP = %ld\n", (long)cx->blk_oldretsp);
622 PerlIO_printf(Perl_debug_log, "BLK_OLDPM = 0x%lx\n", (long)cx->blk_oldpm);
623 PerlIO_printf(Perl_debug_log, "BLK_GIMME = %s\n", cx->blk_gimme ? "LIST" : "SCALAR");
625 switch (cx->cx_type) {
630 PerlIO_printf(Perl_debug_log, "BLK_SUB.CV = 0x%lx\n",
631 (long)cx->blk_sub.cv);
632 PerlIO_printf(Perl_debug_log, "BLK_SUB.GV = 0x%lx\n",
633 (long)cx->blk_sub.gv);
634 PerlIO_printf(Perl_debug_log, "BLK_SUB.DFOUTGV = 0x%lx\n",
635 (long)cx->blk_sub.dfoutgv);
636 PerlIO_printf(Perl_debug_log, "BLK_SUB.OLDDEPTH = %ld\n",
637 (long)cx->blk_sub.olddepth);
638 PerlIO_printf(Perl_debug_log, "BLK_SUB.HASARGS = %d\n",
639 (int)cx->blk_sub.hasargs);
642 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_IN_EVAL = %ld\n",
643 (long)cx->blk_eval.old_in_eval);
644 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_OP_TYPE = %s (%s)\n",
645 op_name[cx->blk_eval.old_op_type],
646 op_desc[cx->blk_eval.old_op_type]);
647 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_NAME = %s\n",
648 cx->blk_eval.old_name);
649 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_EVAL_ROOT = 0x%lx\n",
650 (long)cx->blk_eval.old_eval_root);
654 PerlIO_printf(Perl_debug_log, "BLK_LOOP.LABEL = %s\n",
656 PerlIO_printf(Perl_debug_log, "BLK_LOOP.RESETSP = %ld\n",
657 (long)cx->blk_loop.resetsp);
658 PerlIO_printf(Perl_debug_log, "BLK_LOOP.REDO_OP = 0x%lx\n",
659 (long)cx->blk_loop.redo_op);
660 PerlIO_printf(Perl_debug_log, "BLK_LOOP.NEXT_OP = 0x%lx\n",
661 (long)cx->blk_loop.next_op);
662 PerlIO_printf(Perl_debug_log, "BLK_LOOP.LAST_OP = 0x%lx\n",
663 (long)cx->blk_loop.last_op);
664 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERIX = %ld\n",
665 (long)cx->blk_loop.iterix);
666 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERARY = 0x%lx\n",
667 (long)cx->blk_loop.iterary);
668 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERVAR = 0x%lx\n",
669 (long)cx->blk_loop.itervar);
670 if (cx->blk_loop.itervar)
671 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERSAVE = 0x%lx\n",
672 (long)cx->blk_loop.itersave);
673 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERLVAL = 0x%lx\n",
674 (long)cx->blk_loop.iterlval);
678 PerlIO_printf(Perl_debug_log, "SB_ITERS = %ld\n",
680 PerlIO_printf(Perl_debug_log, "SB_MAXITERS = %ld\n",
681 (long)cx->sb_maxiters);
682 PerlIO_printf(Perl_debug_log, "SB_SAFEBASE = %ld\n",
683 (long)cx->sb_safebase);
684 PerlIO_printf(Perl_debug_log, "SB_ONCE = %ld\n",
686 PerlIO_printf(Perl_debug_log, "SB_ORIG = %s\n",
688 PerlIO_printf(Perl_debug_log, "SB_DSTR = 0x%lx\n",
690 PerlIO_printf(Perl_debug_log, "SB_TARG = 0x%lx\n",
692 PerlIO_printf(Perl_debug_log, "SB_S = 0x%lx\n",
694 PerlIO_printf(Perl_debug_log, "SB_M = 0x%lx\n",
696 PerlIO_printf(Perl_debug_log, "SB_STREND = 0x%lx\n",
697 (long)cx->sb_strend);
698 PerlIO_printf(Perl_debug_log, "SB_SUBBASE = 0x%lx\n",
699 (long)cx->sb_subbase);