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
26 av_extend(curstack, (p - stack_base) + (n) + 128);
34 cxstack_max = cxstack_max * 3 / 2;
35 Renew(cxstack, cxstack_max + 1, CONTEXT); /* XXX should fix CXINC macro */
36 return cxstack_ix + 1;
44 if (retstack_ix == retstack_max) {
45 retstack_max = retstack_max * 3 / 2;
46 Renew(retstack, retstack_max, OP*);
48 retstack[retstack_ix++] = retop;
56 return retstack[--retstack_ix];
65 if (scopestack_ix == scopestack_max) {
66 scopestack_max = scopestack_max * 3 / 2;
67 Renew(scopestack, scopestack_max, I32);
69 scopestack[scopestack_ix++] = savestack_ix;
77 I32 oldsave = scopestack[--scopestack_ix];
85 I32 oldmax = markstack_max - markstack;
86 I32 newmax = oldmax * 3 / 2;
88 Renew(markstack, newmax, I32);
89 markstack_ptr = markstack + oldmax;
90 markstack_max = markstack + newmax;
97 savestack_max = savestack_max * 3 / 2;
98 Renew(savestack, savestack_max, ANY);
105 /* XXX should tmps_floor live in cxstack? */
106 I32 myfloor = tmps_floor;
107 while (tmps_ix > myfloor) { /* clean up after last statement */
108 SV* sv = tmps_stack[tmps_ix];
109 tmps_stack[tmps_ix--] = Nullsv;
114 SvREFCNT_dec(sv); /* note, can modify tmps_ix!!! */
127 sv = *sptr = NEWSV(0,0);
128 if (SvTYPE(osv) >= SVt_PVMG && SvMAGIC(osv) && SvTYPE(osv) != SVt_PVGV) {
129 sv_upgrade(sv, SvTYPE(osv));
130 if (SvGMAGICAL(osv)) {
132 bool oldtainted = tainted;
134 if (tainting && tainted && (mg = mg_find(osv, 't'))) {
135 SAVESPTR(mg->mg_obj);
138 SvFLAGS(osv) |= (SvFLAGS(osv) &
139 (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
140 tainted = oldtainted;
142 SvMAGIC(sv) = SvMAGIC(osv);
143 SvFLAGS(sv) |= SvMAGICAL(osv);
160 return save_scalar_at(&GvSV(gv));
171 SSPUSHINT(SAVEt_SVREF);
172 return save_scalar_at(sptr);
182 SSPUSHPTR(SvREFCNT_inc(gv));
188 Newz(602, gp, 1, GP);
189 GvGP(gv) = gp_ref(gp);
190 GvSV(gv) = NEWSV(72,0);
191 GvLINE(gv) = curcop->cop_line;
207 SSPUSHPTR(GvAVn(gv));
210 GvAV(gv) = Null(AV*);
221 SSPUSHPTR(GvHVn(gv));
224 GvHV(gv) = Null(HV*);
236 SSPUSHPTR(item); /* remember the pointer */
239 SSPUSHPTR(sv); /* remember the value */
240 SSPUSHINT(SAVEt_ITEM);
251 SSPUSHINT(SAVEt_INT);
262 SSPUSHINT(SAVEt_LONG);
273 SSPUSHINT(SAVEt_I32);
284 SSPUSHINT(SAVEt_I16);
298 /* Cannot use save_sptr() to store a char* since the SV** cast will
299 * force word-alignment and we'll miss the pointer.
309 SSPUSHINT(SAVEt_PPTR);
320 SSPUSHINT(SAVEt_SPTR);
330 SSPUSHINT(SAVEt_NSTAB);
341 SSPUSHINT(SAVEt_HPTR);
352 SSPUSHINT(SAVEt_APTR);
362 SSPUSHINT(SAVEt_FREESV);
372 SSPUSHINT(SAVEt_FREEOP);
382 SSPUSHINT(SAVEt_FREEPV);
391 SSPUSHLONG((long)(svp-curpad));
392 SSPUSHINT(SAVEt_CLEARSV);
396 save_delete(hv,key,klen)
406 SSPUSHINT(SAVEt_DELETE);
410 save_list(sarg,maxsarg)
418 SSCHECK(3 * maxsarg);
419 for (i = 1; i <= maxsarg; i++) {
420 SSPUSHPTR(sarg[i]); /* remember the pointer */
422 sv_setsv(sv,sarg[i]);
423 SSPUSHPTR(sv); /* remember the value */
424 SSPUSHINT(SAVEt_ITEM);
430 void (*f) _((void*));
437 SSPUSHINT(SAVEt_DESTRUCTOR);
462 croak("panic: corrupt saved stack index");
463 while (savestack_ix > base) {
465 case SAVEt_ITEM: /* normal string */
466 value = (SV*)SSPOPPTR;
468 sv_replace(sv,value);
473 case SAVEt_SV: /* scalar reference */
474 value = (SV*)SSPOPPTR;
478 case SAVEt_SVREF: /* scalar reference */
479 value = (SV*)SSPOPPTR;
483 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv) &&
484 SvTYPE(sv) != SVt_PVGV)
486 (void)SvUPGRADE(value, SvTYPE(sv));
487 SvMAGIC(value) = SvMAGIC(sv);
488 SvFLAGS(value) |= SvMAGICAL(sv);
492 else if (SvTYPE(value) >= SVt_PVMG && SvMAGIC(value) &&
493 SvTYPE(value) != SVt_PVGV)
495 SvFLAGS(value) |= (SvFLAGS(value) &
496 (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
497 SvMAGICAL_off(value);
506 case SAVEt_AV: /* array reference */
509 SvREFCNT_dec(GvAV(gv));
512 case SAVEt_HV: /* hash reference */
515 SvREFCNT_dec(GvHV(gv));
518 case SAVEt_INT: /* int reference */
520 *(int*)ptr = (int)SSPOPINT;
522 case SAVEt_LONG: /* long reference */
524 *(long*)ptr = (long)SSPOPLONG;
526 case SAVEt_I32: /* I32 reference */
528 *(I32*)ptr = (I32)SSPOPINT;
530 case SAVEt_I16: /* I16 reference */
532 *(I16*)ptr = (I16)SSPOPINT;
534 case SAVEt_IV: /* IV reference */
536 *(IV*)ptr = (IV)SSPOPIV;
538 case SAVEt_SPTR: /* SV* reference */
540 *(SV**)ptr = (SV*)SSPOPPTR;
542 case SAVEt_PPTR: /* char* reference */
544 *(char**)ptr = (char*)SSPOPPTR;
546 case SAVEt_HPTR: /* HV* reference */
548 *(HV**)ptr = (HV*)SSPOPPTR;
550 case SAVEt_APTR: /* AV* reference */
552 *(AV**)ptr = (AV*)SSPOPPTR;
556 (void)sv_clear((SV*)gv);
558 case SAVEt_GP: /* scalar reference */
567 SvREFCNT_dec((SV*)ptr);
572 curpad = AvARRAY(comppad);
577 Safefree((char*)ptr);
580 ptr = (void*)&curpad[SSPOPLONG];
582 /* Can clear pad variable in place? */
583 if (SvREFCNT(sv) <= 1 && !SvOBJECT(sv)) {
584 if (SvTHINKFIRST(sv)) {
586 croak("panic: leave_scope clearsv");
593 switch (SvTYPE(sv)) {
603 croak("panic: leave_scope pad code");
615 else { /* Someone has a claim on this, so abandon it. */
616 U32 padflags = SvFLAGS(sv) & (SVs_PADBUSY|SVs_PADMY|SVs_PADTMP);
617 SvREFCNT_dec(sv); /* Cast current value to the winds. */
618 switch (SvTYPE(sv)) { /* Console ourselves with a new value */
619 case SVt_PVAV: *(SV**)ptr = (SV*)newAV(); break;
620 case SVt_PVHV: *(SV**)ptr = (SV*)newHV(); break;
621 default: *(SV**)ptr = NEWSV(0,0); break;
623 SvFLAGS(*(SV**)ptr) |= padflags; /* preserve pad nature */
630 (void)hv_delete(hv, (char*)ptr, (U32)SSPOPINT, G_DISCARD);
633 case SAVEt_DESTRUCTOR:
637 case SAVEt_REGCONTEXT:
639 I32 delta = SSPOPINT;
640 savestack_ix -= delta; /* regexp must have croaked */
643 case SAVEt_STACK_POS: /* Position on Perl stack */
645 I32 delta = SSPOPINT;
646 stack_sp = stack_base + delta;
653 croak("panic: leave_scope inconsistency");
665 PerlIO_printf(Perl_debug_log, "CX %d = %s\n", cx - cxstack, block_type[cx->cx_type]);
666 if (cx->cx_type != CXt_SUBST) {
667 PerlIO_printf(Perl_debug_log, "BLK_OLDSP = %ld\n", (long)cx->blk_oldsp);
668 PerlIO_printf(Perl_debug_log, "BLK_OLDCOP = 0x%lx\n", (long)cx->blk_oldcop);
669 PerlIO_printf(Perl_debug_log, "BLK_OLDMARKSP = %ld\n", (long)cx->blk_oldmarksp);
670 PerlIO_printf(Perl_debug_log, "BLK_OLDSCOPESP = %ld\n", (long)cx->blk_oldscopesp);
671 PerlIO_printf(Perl_debug_log, "BLK_OLDRETSP = %ld\n", (long)cx->blk_oldretsp);
672 PerlIO_printf(Perl_debug_log, "BLK_OLDPM = 0x%lx\n", (long)cx->blk_oldpm);
673 PerlIO_printf(Perl_debug_log, "BLK_GIMME = %s\n", cx->blk_gimme ? "LIST" : "SCALAR");
675 switch (cx->cx_type) {
680 PerlIO_printf(Perl_debug_log, "BLK_SUB.CV = 0x%lx\n",
681 (long)cx->blk_sub.cv);
682 PerlIO_printf(Perl_debug_log, "BLK_SUB.GV = 0x%lx\n",
683 (long)cx->blk_sub.gv);
684 PerlIO_printf(Perl_debug_log, "BLK_SUB.DFOUTGV = 0x%lx\n",
685 (long)cx->blk_sub.dfoutgv);
686 PerlIO_printf(Perl_debug_log, "BLK_SUB.OLDDEPTH = %ld\n",
687 (long)cx->blk_sub.olddepth);
688 PerlIO_printf(Perl_debug_log, "BLK_SUB.HASARGS = %d\n",
689 (int)cx->blk_sub.hasargs);
692 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_IN_EVAL = %ld\n",
693 (long)cx->blk_eval.old_in_eval);
694 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_OP_TYPE = %s (%s)\n",
695 op_name[cx->blk_eval.old_op_type],
696 op_desc[cx->blk_eval.old_op_type]);
697 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_NAME = %s\n",
698 cx->blk_eval.old_name);
699 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_EVAL_ROOT = 0x%lx\n",
700 (long)cx->blk_eval.old_eval_root);
704 PerlIO_printf(Perl_debug_log, "BLK_LOOP.LABEL = %s\n",
706 PerlIO_printf(Perl_debug_log, "BLK_LOOP.RESETSP = %ld\n",
707 (long)cx->blk_loop.resetsp);
708 PerlIO_printf(Perl_debug_log, "BLK_LOOP.REDO_OP = 0x%lx\n",
709 (long)cx->blk_loop.redo_op);
710 PerlIO_printf(Perl_debug_log, "BLK_LOOP.NEXT_OP = 0x%lx\n",
711 (long)cx->blk_loop.next_op);
712 PerlIO_printf(Perl_debug_log, "BLK_LOOP.LAST_OP = 0x%lx\n",
713 (long)cx->blk_loop.last_op);
714 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERIX = %ld\n",
715 (long)cx->blk_loop.iterix);
716 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERARY = 0x%lx\n",
717 (long)cx->blk_loop.iterary);
718 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERVAR = 0x%lx\n",
719 (long)cx->blk_loop.itervar);
720 if (cx->blk_loop.itervar)
721 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERSAVE = 0x%lx\n",
722 (long)cx->blk_loop.itersave);
723 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERLVAL = 0x%lx\n",
724 (long)cx->blk_loop.iterlval);
728 PerlIO_printf(Perl_debug_log, "SB_ITERS = %ld\n",
730 PerlIO_printf(Perl_debug_log, "SB_MAXITERS = %ld\n",
731 (long)cx->sb_maxiters);
732 PerlIO_printf(Perl_debug_log, "SB_SAFEBASE = %ld\n",
733 (long)cx->sb_safebase);
734 PerlIO_printf(Perl_debug_log, "SB_ONCE = %ld\n",
736 PerlIO_printf(Perl_debug_log, "SB_ORIG = %s\n",
738 PerlIO_printf(Perl_debug_log, "SB_DSTR = 0x%lx\n",
740 PerlIO_printf(Perl_debug_log, "SB_TARG = 0x%lx\n",
742 PerlIO_printf(Perl_debug_log, "SB_S = 0x%lx\n",
744 PerlIO_printf(Perl_debug_log, "SB_M = 0x%lx\n",
746 PerlIO_printf(Perl_debug_log, "SB_STREND = 0x%lx\n",
747 (long)cx->sb_strend);
748 PerlIO_printf(Perl_debug_log, "SB_RXRES = 0x%lx\n",