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!!! */
122 sv = GvSV(gv) = NEWSV(0,0);
123 if (SvTYPE(osv) >= SVt_PVMG && SvMAGIC(osv) && SvTYPE(osv) != SVt_PVGV) {
124 sv_upgrade(sv, SvTYPE(osv));
125 if (SvGMAGICAL(osv)) {
127 bool oldtainted = tainted;
129 if (tainting && tainted && (mg = mg_find(osv, 't'))) {
130 SAVESPTR(mg->mg_obj);
133 SvFLAGS(osv) |= (SvFLAGS(osv) &
134 (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
135 tainted = oldtainted;
137 SvMAGIC(sv) = SvMAGIC(osv);
138 SvFLAGS(sv) |= SvMAGICAL(osv);
152 SSPUSHPTR(SvREFCNT_inc(gv));
158 Newz(602, gp, 1, GP);
161 GvSV(gv) = NEWSV(72,0);
162 GvLINE(gv) = curcop->cop_line;
166 GvGP(gv)->gp_refcnt++;
181 SSPUSHINT(SAVEt_SVREF);
183 sv = *sptr = NEWSV(0,0);
184 if (SvTYPE(osv) >= SVt_PVMG && SvMAGIC(osv) && SvTYPE(osv) != SVt_PVGV) {
185 sv_upgrade(sv, SvTYPE(osv));
186 if (SvGMAGICAL(osv)) {
188 bool oldtainted = tainted;
190 if (tainting && tainted && (mg = mg_find(osv, 't'))) {
191 SAVESPTR(mg->mg_obj);
194 SvFLAGS(osv) |= (SvFLAGS(osv) &
195 (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
196 tainted = oldtainted;
198 SvMAGIC(sv) = SvMAGIC(osv);
199 SvFLAGS(sv) |= SvMAGICAL(osv);
213 SSPUSHPTR(GvAVn(gv));
216 GvAV(gv) = Null(AV*);
226 SSPUSHPTR(GvHVn(gv));
229 GvHV(gv) = Null(HV*);
240 SSPUSHPTR(item); /* remember the pointer */
243 SSPUSHPTR(sv); /* remember the value */
244 SSPUSHINT(SAVEt_ITEM);
254 SSPUSHINT(SAVEt_INT);
264 SSPUSHINT(SAVEt_LONG);
274 SSPUSHINT(SAVEt_I32);
284 SSPUSHINT(SAVEt_I16);
297 /* Cannot use save_sptr() to store a char* since the SV** cast will
298 * force word-alignment and we'll miss the pointer.
307 SSPUSHINT(SAVEt_PPTR);
317 SSPUSHINT(SAVEt_SPTR);
326 SSPUSHINT(SAVEt_NSTAB);
336 SSPUSHINT(SAVEt_HPTR);
346 SSPUSHINT(SAVEt_APTR);
355 SSPUSHINT(SAVEt_FREESV);
364 SSPUSHINT(SAVEt_FREEOP);
373 SSPUSHINT(SAVEt_FREEPV);
381 SSPUSHLONG((long)(svp-curpad));
382 SSPUSHINT(SAVEt_CLEARSV);
386 save_delete(hv,key,klen)
395 SSPUSHINT(SAVEt_DELETE);
399 save_list(sarg,maxsarg)
406 SSCHECK(3 * maxsarg);
407 for (i = 1; i <= maxsarg; i++) {
408 SSPUSHPTR(sarg[i]); /* remember the pointer */
410 sv_setsv(sv,sarg[i]);
411 SSPUSHPTR(sv); /* remember the value */
412 SSPUSHINT(SAVEt_ITEM);
418 void (*f) _((void*));
424 SSPUSHINT(SAVEt_DESTRUCTOR);
439 croak("panic: corrupt saved stack index");
440 while (savestack_ix > base) {
442 case SAVEt_ITEM: /* normal string */
443 value = (SV*)SSPOPPTR;
445 sv_replace(sv,value);
450 case SAVEt_SV: /* scalar reference */
451 value = (SV*)SSPOPPTR;
454 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv) &&
455 SvTYPE(sv) != SVt_PVGV)
457 (void)SvUPGRADE(value, SvTYPE(sv));
458 SvMAGIC(value) = SvMAGIC(sv);
459 SvFLAGS(value) |= SvMAGICAL(sv);
469 case SAVEt_SVREF: /* scalar reference */
472 value = (SV*)SSPOPPTR;
473 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv) &&
474 SvTYPE(sv) != SVt_PVGV)
476 (void)SvUPGRADE(value, SvTYPE(sv));
477 SvMAGIC(value) = SvMAGIC(sv);
478 SvFLAGS(value) |= SvMAGICAL(sv);
488 case SAVEt_AV: /* array reference */
491 SvREFCNT_dec(GvAV(gv));
494 case SAVEt_HV: /* hash reference */
497 SvREFCNT_dec(GvHV(gv));
500 case SAVEt_INT: /* int reference */
502 *(int*)ptr = (int)SSPOPINT;
504 case SAVEt_LONG: /* long reference */
506 *(long*)ptr = (long)SSPOPLONG;
508 case SAVEt_I32: /* I32 reference */
510 *(I32*)ptr = (I32)SSPOPINT;
512 case SAVEt_I16: /* I16 reference */
514 *(I16*)ptr = (I16)SSPOPINT;
516 case SAVEt_IV: /* IV reference */
518 *(IV*)ptr = (IV)SSPOPIV;
520 case SAVEt_SPTR: /* SV* reference */
522 *(SV**)ptr = (SV*)SSPOPPTR;
524 case SAVEt_PPTR: /* char* reference */
526 *(char**)ptr = (char*)SSPOPPTR;
528 case SAVEt_HPTR: /* HV* reference */
530 *(HV**)ptr = (HV*)SSPOPPTR;
532 case SAVEt_APTR: /* AV* reference */
534 *(AV**)ptr = (AV*)SSPOPPTR;
538 (void)sv_clear((SV*)gv);
540 case SAVEt_GP: /* scalar reference */
549 SvREFCNT_dec((SV*)ptr);
553 curpad = AvARRAY(comppad);
558 Safefree((char*)ptr);
561 ptr = (void*)&curpad[SSPOPLONG];
563 if (SvREFCNT(sv) <= 1) { /* Can clear pad variable in place. */
564 if (SvTHINKFIRST(sv)) {
566 croak("panic: leave_scope clearsv");
573 switch (SvTYPE(sv)) {
587 if (SvPOK(sv) && SvLEN(sv))
593 else { /* Someone has a claim on this, so abandon it. */
594 U32 padflags = SvFLAGS(sv) & (SVs_PADBUSY|SVs_PADMY|SVs_PADTMP);
595 SvREFCNT_dec(sv); /* Cast current value to the winds. */
596 switch (SvTYPE(sv)) { /* Console ourselves with a new value */
597 case SVt_PVAV: *(SV**)ptr = (SV*)newAV(); break;
598 case SVt_PVHV: *(SV**)ptr = (SV*)newHV(); break;
599 default: *(SV**)ptr = NEWSV(0,0); break;
601 SvFLAGS(*(SV**)ptr) |= padflags; /* preserve pad nature */
608 (void)hv_delete(hv, (char*)ptr, (U32)SSPOPINT, G_DISCARD);
611 case SAVEt_DESTRUCTOR:
615 case SAVEt_REGCONTEXT:
617 I32 delta = SSPOPINT;
618 savestack_ix -= delta; /* regexp must have croaked */
621 case SAVEt_STACK_POS: /* Position on Perl stack */
623 I32 delta = SSPOPINT;
624 stack_sp = stack_base + delta;
628 croak("panic: leave_scope inconsistency");
639 PerlIO_printf(Perl_debug_log, "CX %d = %s\n", cx - cxstack, block_type[cx->cx_type]);
640 if (cx->cx_type != CXt_SUBST) {
641 PerlIO_printf(Perl_debug_log, "BLK_OLDSP = %ld\n", (long)cx->blk_oldsp);
642 PerlIO_printf(Perl_debug_log, "BLK_OLDCOP = 0x%lx\n", (long)cx->blk_oldcop);
643 PerlIO_printf(Perl_debug_log, "BLK_OLDMARKSP = %ld\n", (long)cx->blk_oldmarksp);
644 PerlIO_printf(Perl_debug_log, "BLK_OLDSCOPESP = %ld\n", (long)cx->blk_oldscopesp);
645 PerlIO_printf(Perl_debug_log, "BLK_OLDRETSP = %ld\n", (long)cx->blk_oldretsp);
646 PerlIO_printf(Perl_debug_log, "BLK_OLDPM = 0x%lx\n", (long)cx->blk_oldpm);
647 PerlIO_printf(Perl_debug_log, "BLK_GIMME = %s\n", cx->blk_gimme ? "LIST" : "SCALAR");
649 switch (cx->cx_type) {
654 PerlIO_printf(Perl_debug_log, "BLK_SUB.CV = 0x%lx\n",
655 (long)cx->blk_sub.cv);
656 PerlIO_printf(Perl_debug_log, "BLK_SUB.GV = 0x%lx\n",
657 (long)cx->blk_sub.gv);
658 PerlIO_printf(Perl_debug_log, "BLK_SUB.DFOUTGV = 0x%lx\n",
659 (long)cx->blk_sub.dfoutgv);
660 PerlIO_printf(Perl_debug_log, "BLK_SUB.OLDDEPTH = %ld\n",
661 (long)cx->blk_sub.olddepth);
662 PerlIO_printf(Perl_debug_log, "BLK_SUB.HASARGS = %d\n",
663 (int)cx->blk_sub.hasargs);
666 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_IN_EVAL = %ld\n",
667 (long)cx->blk_eval.old_in_eval);
668 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_OP_TYPE = %s (%s)\n",
669 op_name[cx->blk_eval.old_op_type],
670 op_desc[cx->blk_eval.old_op_type]);
671 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_NAME = %s\n",
672 cx->blk_eval.old_name);
673 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_EVAL_ROOT = 0x%lx\n",
674 (long)cx->blk_eval.old_eval_root);
678 PerlIO_printf(Perl_debug_log, "BLK_LOOP.LABEL = %s\n",
680 PerlIO_printf(Perl_debug_log, "BLK_LOOP.RESETSP = %ld\n",
681 (long)cx->blk_loop.resetsp);
682 PerlIO_printf(Perl_debug_log, "BLK_LOOP.REDO_OP = 0x%lx\n",
683 (long)cx->blk_loop.redo_op);
684 PerlIO_printf(Perl_debug_log, "BLK_LOOP.NEXT_OP = 0x%lx\n",
685 (long)cx->blk_loop.next_op);
686 PerlIO_printf(Perl_debug_log, "BLK_LOOP.LAST_OP = 0x%lx\n",
687 (long)cx->blk_loop.last_op);
688 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERIX = %ld\n",
689 (long)cx->blk_loop.iterix);
690 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERARY = 0x%lx\n",
691 (long)cx->blk_loop.iterary);
692 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERVAR = 0x%lx\n",
693 (long)cx->blk_loop.itervar);
694 if (cx->blk_loop.itervar)
695 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERSAVE = 0x%lx\n",
696 (long)cx->blk_loop.itersave);
700 PerlIO_printf(Perl_debug_log, "SB_ITERS = %ld\n",
702 PerlIO_printf(Perl_debug_log, "SB_MAXITERS = %ld\n",
703 (long)cx->sb_maxiters);
704 PerlIO_printf(Perl_debug_log, "SB_SAFEBASE = %ld\n",
705 (long)cx->sb_safebase);
706 PerlIO_printf(Perl_debug_log, "SB_ONCE = %ld\n",
708 PerlIO_printf(Perl_debug_log, "SB_ORIG = %s\n",
710 PerlIO_printf(Perl_debug_log, "SB_DSTR = 0x%lx\n",
712 PerlIO_printf(Perl_debug_log, "SB_TARG = 0x%lx\n",
714 PerlIO_printf(Perl_debug_log, "SB_S = 0x%lx\n",
716 PerlIO_printf(Perl_debug_log, "SB_M = 0x%lx\n",
718 PerlIO_printf(Perl_debug_log, "SB_STREND = 0x%lx\n",
719 (long)cx->sb_strend);
720 PerlIO_printf(Perl_debug_log, "SB_SUBBASE = 0x%lx\n",
721 (long)cx->sb_subbase);