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
26 av_extend(stack, (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!!! */
132 sv = GvSV(gv) = NEWSV(0,0);
133 if (SvTYPE(osv) >= SVt_PVMG && SvMAGIC(osv) && SvTYPE(osv) != SVt_PVGV) {
134 sv_upgrade(sv, SvTYPE(osv));
135 if (SvGMAGICAL(osv)) {
137 bool oldtainted = tainted;
139 if (tainting && tainted && (mg = mg_find(osv, 't'))) {
140 SAVESPTR(mg->mg_obj);
143 SvFLAGS(osv) |= (SvFLAGS(osv) &
144 (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
145 tainted = oldtainted;
147 SvMAGIC(sv) = SvMAGIC(osv);
148 SvFLAGS(sv) |= SvMAGICAL(osv);
156 #ifdef INLINED_ELSEWHERE
166 SSPUSHPTR(SvREFCNT_inc(gv));
173 GvSV(gv) = NEWSV(72,0);
174 GvLINE(gv) = curcop->cop_line;
190 SSPUSHINT(SAVEt_SVREF);
192 sv = *sptr = NEWSV(0,0);
193 if (SvTYPE(osv) >= SVt_PVMG && SvMAGIC(osv) && SvTYPE(osv) != SVt_PVGV) {
194 sv_upgrade(sv, SvTYPE(osv));
195 if (SvGMAGICAL(osv)) {
197 bool oldtainted = tainted;
199 if (tainting && tainted && (mg = mg_find(osv, 't'))) {
200 SAVESPTR(mg->mg_obj);
203 SvFLAGS(osv) |= (SvFLAGS(osv) &
204 (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
205 tainted = oldtainted;
207 SvMAGIC(sv) = SvMAGIC(osv);
208 SvFLAGS(sv) |= SvMAGICAL(osv);
223 SSPUSHPTR(GvAVn(gv));
226 GvAV(gv) = Null(AV*);
237 SSPUSHPTR(GvHVn(gv));
240 GvHV(gv) = Null(HV*);
252 SSPUSHPTR(item); /* remember the pointer */
255 SSPUSHPTR(sv); /* remember the value */
256 SSPUSHINT(SAVEt_ITEM);
267 SSPUSHINT(SAVEt_INT);
278 SSPUSHINT(SAVEt_LONG);
289 SSPUSHINT(SAVEt_I32);
303 /* Cannot use save_sptr() to store a char* since the SV** cast will
304 * force word-alignment and we'll miss the pointer.
314 SSPUSHINT(SAVEt_PPTR);
325 SSPUSHINT(SAVEt_SPTR);
335 SSPUSHINT(SAVEt_NSTAB);
346 SSPUSHINT(SAVEt_HPTR);
357 SSPUSHINT(SAVEt_APTR);
367 SSPUSHINT(SAVEt_FREESV);
377 SSPUSHINT(SAVEt_FREEOP);
387 SSPUSHINT(SAVEt_FREEPV);
396 SSPUSHLONG((long)(svp-curpad));
397 SSPUSHINT(SAVEt_CLEARSV);
401 save_delete(hv,key,klen)
411 SSPUSHINT(SAVEt_DELETE);
415 save_list(sarg,maxsarg)
423 SSCHECK(3 * maxsarg);
424 for (i = 1; i <= maxsarg; i++) {
425 SSPUSHPTR(sarg[i]); /* remember the pointer */
427 sv_setsv(sv,sarg[i]);
428 SSPUSHPTR(sv); /* remember the value */
429 SSPUSHINT(SAVEt_ITEM);
435 void (*f) _((void*));
442 SSPUSHINT(SAVEt_DESTRUCTOR);
458 croak("panic: corrupt saved stack index");
459 while (savestack_ix > base) {
461 case SAVEt_ITEM: /* normal string */
462 value = (SV*)SSPOPPTR;
464 sv_replace(sv,value);
469 case SAVEt_SV: /* scalar reference */
470 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_SVREF: /* scalar reference */
491 value = (SV*)SSPOPPTR;
492 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv) &&
493 SvTYPE(sv) != SVt_PVGV)
495 (void)SvUPGRADE(value, SvTYPE(sv));
496 SvMAGIC(value) = SvMAGIC(sv);
497 SvFLAGS(value) |= SvMAGICAL(sv);
507 case SAVEt_AV: /* array reference */
510 SvREFCNT_dec(GvAV(gv));
513 case SAVEt_HV: /* hash reference */
516 SvREFCNT_dec(GvHV(gv));
519 case SAVEt_INT: /* int reference */
521 *(int*)ptr = (int)SSPOPINT;
523 case SAVEt_LONG: /* long reference */
525 *(long*)ptr = (long)SSPOPLONG;
527 case SAVEt_I32: /* I32 reference */
529 *(I32*)ptr = (I32)SSPOPINT;
531 case SAVEt_IV: /* IV reference */
533 *(IV*)ptr = (IV)SSPOPIV;
535 case SAVEt_SPTR: /* SV* reference */
537 *(SV**)ptr = (SV*)SSPOPPTR;
539 case SAVEt_PPTR: /* char* reference */
541 *(char**)ptr = (char*)SSPOPPTR;
543 case SAVEt_HPTR: /* HV* reference */
545 *(HV**)ptr = (HV*)SSPOPPTR;
547 case SAVEt_APTR: /* AV* reference */
549 *(AV**)ptr = (AV*)SSPOPPTR;
555 case SAVEt_GP: /* scalar reference */
564 SvREFCNT_dec((SV*)ptr);
568 curpad = AvARRAY(comppad);
573 Safefree((char*)ptr);
576 ptr = (void*)&curpad[SSPOPLONG];
578 if (SvREFCNT(sv) <= 1) { /* Can clear pad variable in place. */
579 if (SvTHINKFIRST(sv)) {
581 croak("panic: leave_scope clearsv");
588 switch (SvTYPE(sv)) {
602 if (SvPOK(sv) && SvLEN(sv))
608 else { /* Someone has a claim on this, so abandon it. */
609 U32 padflags = SvFLAGS(sv) & (SVs_PADBUSY|SVs_PADMY|SVs_PADTMP);
610 SvREFCNT_dec(sv); /* Cast current value to the winds. */
611 switch (SvTYPE(sv)) { /* Console ourselves with a new value */
612 case SVt_PVAV: *(SV**)ptr = (SV*)newAV(); break;
613 case SVt_PVHV: *(SV**)ptr = (SV*)newHV(); break;
614 default: *(SV**)ptr = NEWSV(0,0); break;
616 SvFLAGS(*(SV**)ptr) |= padflags; /* preserve pad nature */
623 (void)hv_delete(hv, (char*)ptr, (U32)SSPOPINT, G_DISCARD);
626 case SAVEt_DESTRUCTOR:
630 case SAVEt_REGCONTEXT:
632 I32 delta = SSPOPINT;
633 savestack_ix -= delta; /* regexp must have croaked */
637 croak("panic: leave_scope inconsistency");
648 fprintf(stderr, "CX %d = %s\n", cx - cxstack, block_type[cx->cx_type]);
649 if (cx->cx_type != CXt_SUBST) {
650 fprintf(stderr, "BLK_OLDSP = %ld\n", (long)cx->blk_oldsp);
651 fprintf(stderr, "BLK_OLDCOP = 0x%lx\n", (long)cx->blk_oldcop);
652 fprintf(stderr, "BLK_OLDMARKSP = %ld\n", (long)cx->blk_oldmarksp);
653 fprintf(stderr, "BLK_OLDSCOPESP = %ld\n", (long)cx->blk_oldscopesp);
654 fprintf(stderr, "BLK_OLDRETSP = %ld\n", (long)cx->blk_oldretsp);
655 fprintf(stderr, "BLK_OLDPM = 0x%lx\n", (long)cx->blk_oldpm);
656 fprintf(stderr, "BLK_GIMME = %s\n", cx->blk_gimme ? "LIST" : "SCALAR");
658 switch (cx->cx_type) {
663 fprintf(stderr, "BLK_SUB.CV = 0x%lx\n",
664 (long)cx->blk_sub.cv);
665 fprintf(stderr, "BLK_SUB.GV = 0x%lx\n",
666 (long)cx->blk_sub.gv);
667 fprintf(stderr, "BLK_SUB.DFOUTGV = 0x%lx\n",
668 (long)cx->blk_sub.dfoutgv);
669 fprintf(stderr, "BLK_SUB.OLDDEPTH = %ld\n",
670 (long)cx->blk_sub.olddepth);
671 fprintf(stderr, "BLK_SUB.HASARGS = %d\n",
672 (int)cx->blk_sub.hasargs);
675 fprintf(stderr, "BLK_EVAL.OLD_IN_EVAL = %ld\n",
676 (long)cx->blk_eval.old_in_eval);
677 fprintf(stderr, "BLK_EVAL.OLD_OP_TYPE = %s (%s)\n",
678 op_name[cx->blk_eval.old_op_type],
679 op_desc[cx->blk_eval.old_op_type]);
680 fprintf(stderr, "BLK_EVAL.OLD_NAME = %s\n",
681 cx->blk_eval.old_name);
682 fprintf(stderr, "BLK_EVAL.OLD_EVAL_ROOT = 0x%lx\n",
683 (long)cx->blk_eval.old_eval_root);
687 fprintf(stderr, "BLK_LOOP.LABEL = %s\n",
689 fprintf(stderr, "BLK_LOOP.RESETSP = %ld\n",
690 (long)cx->blk_loop.resetsp);
691 fprintf(stderr, "BLK_LOOP.REDO_OP = 0x%lx\n",
692 (long)cx->blk_loop.redo_op);
693 fprintf(stderr, "BLK_LOOP.NEXT_OP = 0x%lx\n",
694 (long)cx->blk_loop.next_op);
695 fprintf(stderr, "BLK_LOOP.LAST_OP = 0x%lx\n",
696 (long)cx->blk_loop.last_op);
697 fprintf(stderr, "BLK_LOOP.ITERIX = %ld\n",
698 (long)cx->blk_loop.iterix);
699 fprintf(stderr, "BLK_LOOP.ITERARY = 0x%lx\n",
700 (long)cx->blk_loop.iterary);
701 fprintf(stderr, "BLK_LOOP.ITERVAR = 0x%lx\n",
702 (long)cx->blk_loop.itervar);
703 if (cx->blk_loop.itervar)
704 fprintf(stderr, "BLK_LOOP.ITERSAVE = 0x%lx\n",
705 (long)cx->blk_loop.itersave);
709 fprintf(stderr, "SB_ITERS = %ld\n",
711 fprintf(stderr, "SB_MAXITERS = %ld\n",
712 (long)cx->sb_maxiters);
713 fprintf(stderr, "SB_SAFEBASE = %ld\n",
714 (long)cx->sb_safebase);
715 fprintf(stderr, "SB_ONCE = %ld\n",
717 fprintf(stderr, "SB_ORIG = %s\n",
719 fprintf(stderr, "SB_DSTR = 0x%lx\n",
721 fprintf(stderr, "SB_TARG = 0x%lx\n",
723 fprintf(stderr, "SB_S = 0x%lx\n",
725 fprintf(stderr, "SB_M = 0x%lx\n",
727 fprintf(stderr, "SB_STREND = 0x%lx\n",
728 (long)cx->sb_strend);
729 fprintf(stderr, "SB_SUBBASE = 0x%lx\n",
730 (long)cx->sb_subbase);