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Tweaks to constant.pm
[p5sagit/p5-mst-13.2.git] / pp_hot.c
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a0d0e21e 1/* pp_hot.c
2 *
9607fc9c 3 * Copyright (c) 1991-1997, Larry Wall
a0d0e21e 4 *
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.
7 *
8 */
9
10/*
11 * Then he heard Merry change the note, and up went the Horn-cry of Buckland,
12 * shaking the air.
13 *
14 * Awake! Awake! Fear, Fire, Foes! Awake!
15 * Fire, Foes! Awake!
16 */
17
18#include "EXTERN.h"
19#include "perl.h"
20
21/* Hot code. */
22
23PP(pp_const)
24{
25 dSP;
26 XPUSHs(cSVOP->op_sv);
27 RETURN;
28}
29
30PP(pp_nextstate)
31{
32 curcop = (COP*)op;
33 TAINT_NOT; /* Each statement is presumed innocent */
34 stack_sp = stack_base + cxstack[cxstack_ix].blk_oldsp;
35 FREETMPS;
36 return NORMAL;
37}
38
39PP(pp_gvsv)
40{
41 dSP;
42 EXTEND(sp,1);
43 if (op->op_private & OPpLVAL_INTRO)
44 PUSHs(save_scalar(cGVOP->op_gv));
45 else
46 PUSHs(GvSV(cGVOP->op_gv));
47 RETURN;
48}
49
50PP(pp_null)
51{
52 return NORMAL;
53}
54
55PP(pp_pushmark)
56{
57 PUSHMARK(stack_sp);
58 return NORMAL;
59}
60
61PP(pp_stringify)
62{
63 dSP; dTARGET;
64 STRLEN len;
65 char *s;
66 s = SvPV(TOPs,len);
67 sv_setpvn(TARG,s,len);
68 SETTARG;
69 RETURN;
70}
71
72PP(pp_gv)
73{
74 dSP;
75 XPUSHs((SV*)cGVOP->op_gv);
76 RETURN;
77}
78
c07a80fd 79PP(pp_gelem)
80{
81 GV *gv;
82 SV *sv;
83 SV *ref;
84 char *elem;
85 dSP;
86
87 sv = POPs;
88 elem = SvPV(sv, na);
89 gv = (GV*)POPs;
90 ref = Nullsv;
91 sv = Nullsv;
92 switch (elem ? *elem : '\0')
93 {
94 case 'A':
95 if (strEQ(elem, "ARRAY"))
96 ref = (SV*)GvAV(gv);
97 break;
98 case 'C':
99 if (strEQ(elem, "CODE"))
8ebc5c01 100 ref = (SV*)GvCVu(gv);
c07a80fd 101 break;
102 case 'F':
36477c24 103 if (strEQ(elem, "FILEHANDLE")) /* XXX deprecate in 5.005 */
c07a80fd 104 ref = (SV*)GvIOp(gv);
105 break;
106 case 'G':
107 if (strEQ(elem, "GLOB"))
108 ref = (SV*)gv;
109 break;
110 case 'H':
111 if (strEQ(elem, "HASH"))
112 ref = (SV*)GvHV(gv);
113 break;
36477c24 114 case 'I':
115 if (strEQ(elem, "IO"))
116 ref = (SV*)GvIOp(gv);
117 break;
c07a80fd 118 case 'N':
119 if (strEQ(elem, "NAME"))
120 sv = newSVpv(GvNAME(gv), GvNAMELEN(gv));
121 break;
122 case 'P':
123 if (strEQ(elem, "PACKAGE"))
124 sv = newSVpv(HvNAME(GvSTASH(gv)), 0);
125 break;
126 case 'S':
127 if (strEQ(elem, "SCALAR"))
128 ref = GvSV(gv);
129 break;
130 }
131 if (ref)
132 sv = newRV(ref);
133 if (sv)
134 sv_2mortal(sv);
135 else
136 sv = &sv_undef;
137 XPUSHs(sv);
138 RETURN;
139}
140
a0d0e21e 141PP(pp_and)
142{
143 dSP;
144 if (!SvTRUE(TOPs))
145 RETURN;
146 else {
147 --SP;
148 RETURNOP(cLOGOP->op_other);
149 }
150}
151
152PP(pp_sassign)
153{
154 dSP; dPOPTOPssrl;
748a9306 155 MAGIC *mg;
156
a0d0e21e 157 if (op->op_private & OPpASSIGN_BACKWARDS) {
158 SV *temp;
159 temp = left; left = right; right = temp;
160 }
bbce6d69 161 if (tainting && tainted && !SvTAINTED(left))
a0d0e21e 162 TAINT_NOT;
54310121 163 SvSetMagicSV(right, left);
a0d0e21e 164 SETs(right);
165 RETURN;
166}
167
168PP(pp_cond_expr)
169{
170 dSP;
171 if (SvTRUEx(POPs))
172 RETURNOP(cCONDOP->op_true);
173 else
174 RETURNOP(cCONDOP->op_false);
175}
176
177PP(pp_unstack)
178{
179 I32 oldsave;
180 TAINT_NOT; /* Each statement is presumed innocent */
181 stack_sp = stack_base + cxstack[cxstack_ix].blk_oldsp;
182 FREETMPS;
183 oldsave = scopestack[scopestack_ix - 1];
184 LEAVE_SCOPE(oldsave);
185 return NORMAL;
186}
187
a0d0e21e 188PP(pp_concat)
189{
748a9306 190 dSP; dATARGET; tryAMAGICbin(concat,opASSIGN);
191 {
192 dPOPTOPssrl;
a0d0e21e 193 STRLEN len;
194 char *s;
195 if (TARG != left) {
196 s = SvPV(left,len);
197 sv_setpvn(TARG,s,len);
198 }
c07a80fd 199 else if (SvGMAGICAL(TARG))
200 mg_get(TARG);
7a4c00b4 201 else if (!SvOK(TARG) && SvTYPE(TARG) <= SVt_PVMG) {
748a9306 202 sv_setpv(TARG, ""); /* Suppress warning. */
7a4c00b4 203 s = SvPV_force(TARG, len);
4633a7c4 204 }
a0d0e21e 205 s = SvPV(right,len);
68dc0745 206 if (SvOK(TARG))
207 sv_catpvn(TARG,s,len);
208 else
209 sv_setpvn(TARG,s,len); /* suppress warning */
a0d0e21e 210 SETTARG;
211 RETURN;
748a9306 212 }
a0d0e21e 213}
214
215PP(pp_padsv)
216{
217 dSP; dTARGET;
218 XPUSHs(TARG);
4633a7c4 219 if (op->op_flags & OPf_MOD) {
220 if (op->op_private & OPpLVAL_INTRO)
221 SAVECLEARSV(curpad[op->op_targ]);
5f05dabc 222 else if (op->op_private & OPpDEREF)
54310121 223 vivify_ref(curpad[op->op_targ], op->op_private & OPpDEREF);
4633a7c4 224 }
a0d0e21e 225 RETURN;
226}
227
228PP(pp_readline)
229{
230 last_in_gv = (GV*)(*stack_sp--);
231 return do_readline();
232}
233
234PP(pp_eq)
235{
236 dSP; tryAMAGICbinSET(eq,0);
237 {
238 dPOPnv;
54310121 239 SETs(boolSV(TOPn == value));
a0d0e21e 240 RETURN;
241 }
242}
243
244PP(pp_preinc)
245{
246 dSP;
68dc0745 247 if (SvREADONLY(TOPs) || SvTYPE(TOPs) > SVt_PVLV)
44a8e56a 248 croak(no_modify);
55497cff 249 if (SvIOK(TOPs) && !SvNOK(TOPs) && !SvPOK(TOPs) &&
250 SvIVX(TOPs) != IV_MAX)
251 {
252 ++SvIVX(TOPs);
253 SvFLAGS(TOPs) &= ~(SVp_NOK|SVp_POK);
748a9306 254 }
255 else
256 sv_inc(TOPs);
a0d0e21e 257 SvSETMAGIC(TOPs);
258 return NORMAL;
259}
260
261PP(pp_or)
262{
263 dSP;
264 if (SvTRUE(TOPs))
265 RETURN;
266 else {
267 --SP;
268 RETURNOP(cLOGOP->op_other);
269 }
270}
271
272PP(pp_add)
273{
274 dSP; dATARGET; tryAMAGICbin(add,opASSIGN);
275 {
7a4c00b4 276 dPOPTOPnnrl_ul;
a0d0e21e 277 SETn( left + right );
278 RETURN;
279 }
280}
281
282PP(pp_aelemfast)
283{
284 dSP;
285 AV *av = GvAV((GV*)cSVOP->op_sv);
286 SV** svp = av_fetch(av, op->op_private, op->op_flags & OPf_MOD);
287 PUSHs(svp ? *svp : &sv_undef);
288 RETURN;
289}
290
291PP(pp_join)
292{
293 dSP; dMARK; dTARGET;
294 MARK++;
295 do_join(TARG, *MARK, MARK, SP);
296 SP = MARK;
297 SETs(TARG);
298 RETURN;
299}
300
301PP(pp_pushre)
302{
303 dSP;
44a8e56a 304#ifdef DEBUGGING
305 /*
306 * We ass_u_me that LvTARGOFF() comes first, and that two STRLENs
307 * will be enough to hold an OP*.
308 */
309 SV* sv = sv_newmortal();
310 sv_upgrade(sv, SVt_PVLV);
311 LvTYPE(sv) = '/';
312 Copy(&op, &LvTARGOFF(sv), 1, OP*);
313 XPUSHs(sv);
314#else
a0d0e21e 315 XPUSHs((SV*)op);
44a8e56a 316#endif
a0d0e21e 317 RETURN;
318}
319
320/* Oversized hot code. */
321
322PP(pp_print)
323{
324 dSP; dMARK; dORIGMARK;
325 GV *gv;
326 IO *io;
760ac839 327 register PerlIO *fp;
236988e4 328 MAGIC *mg;
a0d0e21e 329
330 if (op->op_flags & OPf_STACKED)
331 gv = (GV*)*++MARK;
332 else
333 gv = defoutgv;
236988e4 334 if (SvMAGICAL(gv) && (mg = mg_find((SV*)gv, 'q'))) {
68dc0745 335 if (MARK == ORIGMARK) {
336 EXTEND(SP, 1);
337 ++MARK;
338 Move(MARK, MARK + 1, (SP - MARK) + 1, SV*);
339 ++SP;
340 }
341 PUSHMARK(MARK - 1);
236988e4 342 *MARK = mg->mg_obj;
68dc0745 343 PUTBACK;
236988e4 344 ENTER;
345 perl_call_method("PRINT", G_SCALAR);
346 LEAVE;
347 SPAGAIN;
68dc0745 348 MARK = ORIGMARK + 1;
349 *MARK = *SP;
350 SP = MARK;
236988e4 351 RETURN;
352 }
a0d0e21e 353 if (!(io = GvIO(gv))) {
748a9306 354 if (dowarn) {
355 SV* sv = sv_newmortal();
4f732624 356 gv_fullname3(sv, gv, Nullch);
748a9306 357 warn("Filehandle %s never opened", SvPV(sv,na));
358 }
359
360 SETERRNO(EBADF,RMS$_IFI);
a0d0e21e 361 goto just_say_no;
362 }
363 else if (!(fp = IoOFP(io))) {
364 if (dowarn) {
748a9306 365 SV* sv = sv_newmortal();
4f732624 366 gv_fullname3(sv, gv, Nullch);
a0d0e21e 367 if (IoIFP(io))
748a9306 368 warn("Filehandle %s opened only for input", SvPV(sv,na));
a0d0e21e 369 else
748a9306 370 warn("print on closed filehandle %s", SvPV(sv,na));
a0d0e21e 371 }
748a9306 372 SETERRNO(EBADF,IoIFP(io)?RMS$_FAC:RMS$_IFI);
a0d0e21e 373 goto just_say_no;
374 }
375 else {
376 MARK++;
377 if (ofslen) {
378 while (MARK <= SP) {
379 if (!do_print(*MARK, fp))
380 break;
381 MARK++;
382 if (MARK <= SP) {
760ac839 383 if (PerlIO_write(fp, ofs, ofslen) == 0 || PerlIO_error(fp)) {
a0d0e21e 384 MARK--;
385 break;
386 }
387 }
388 }
389 }
390 else {
391 while (MARK <= SP) {
392 if (!do_print(*MARK, fp))
393 break;
394 MARK++;
395 }
396 }
397 if (MARK <= SP)
398 goto just_say_no;
399 else {
400 if (orslen)
760ac839 401 if (PerlIO_write(fp, ors, orslen) == 0 || PerlIO_error(fp))
a0d0e21e 402 goto just_say_no;
403
404 if (IoFLAGS(io) & IOf_FLUSH)
760ac839 405 if (PerlIO_flush(fp) == EOF)
a0d0e21e 406 goto just_say_no;
407 }
408 }
409 SP = ORIGMARK;
410 PUSHs(&sv_yes);
411 RETURN;
412
413 just_say_no:
414 SP = ORIGMARK;
415 PUSHs(&sv_undef);
416 RETURN;
417}
418
419PP(pp_rv2av)
420{
421 dSP; dPOPss;
a0d0e21e 422 AV *av;
423
424 if (SvROK(sv)) {
425 wasref:
426 av = (AV*)SvRV(sv);
427 if (SvTYPE(av) != SVt_PVAV)
428 DIE("Not an ARRAY reference");
429 if (op->op_private & OPpLVAL_INTRO)
430 av = (AV*)save_svref((SV**)sv);
431 if (op->op_flags & OPf_REF) {
432 PUSHs((SV*)av);
433 RETURN;
434 }
435 }
436 else {
437 if (SvTYPE(sv) == SVt_PVAV) {
438 av = (AV*)sv;
439 if (op->op_flags & OPf_REF) {
440 PUSHs((SV*)av);
441 RETURN;
442 }
443 }
444 else {
67955e0c 445 GV *gv;
446
a0d0e21e 447 if (SvTYPE(sv) != SVt_PVGV) {
748a9306 448 char *sym;
449
a0d0e21e 450 if (SvGMAGICAL(sv)) {
451 mg_get(sv);
452 if (SvROK(sv))
453 goto wasref;
454 }
455 if (!SvOK(sv)) {
456 if (op->op_flags & OPf_REF ||
457 op->op_private & HINT_STRICT_REFS)
458 DIE(no_usym, "an ARRAY");
d83e6520 459 if (dowarn)
460 warn(warn_uninit);
4633a7c4 461 if (GIMME == G_ARRAY)
462 RETURN;
a0d0e21e 463 RETPUSHUNDEF;
464 }
748a9306 465 sym = SvPV(sv,na);
a0d0e21e 466 if (op->op_private & HINT_STRICT_REFS)
748a9306 467 DIE(no_symref, sym, "an ARRAY");
67955e0c 468 gv = (GV*)gv_fetchpv(sym, TRUE, SVt_PVAV);
469 } else {
470 gv = (GV*)sv;
a0d0e21e 471 }
67955e0c 472 av = GvAVn(gv);
a0d0e21e 473 if (op->op_private & OPpLVAL_INTRO)
67955e0c 474 av = save_ary(gv);
a0d0e21e 475 if (op->op_flags & OPf_REF) {
476 PUSHs((SV*)av);
477 RETURN;
478 }
479 }
480 }
481
482 if (GIMME == G_ARRAY) {
483 I32 maxarg = AvFILL(av) + 1;
484 EXTEND(SP, maxarg);
485 Copy(AvARRAY(av), SP+1, maxarg, SV*);
486 SP += maxarg;
487 }
488 else {
489 dTARGET;
490 I32 maxarg = AvFILL(av) + 1;
491 PUSHi(maxarg);
492 }
493 RETURN;
494}
495
496PP(pp_rv2hv)
497{
a0d0e21e 498 dSP; dTOPss;
a0d0e21e 499 HV *hv;
500
501 if (SvROK(sv)) {
502 wasref:
503 hv = (HV*)SvRV(sv);
504 if (SvTYPE(hv) != SVt_PVHV)
505 DIE("Not a HASH reference");
506 if (op->op_private & OPpLVAL_INTRO)
507 hv = (HV*)save_svref((SV**)sv);
508 if (op->op_flags & OPf_REF) {
509 SETs((SV*)hv);
510 RETURN;
511 }
512 }
513 else {
514 if (SvTYPE(sv) == SVt_PVHV) {
515 hv = (HV*)sv;
516 if (op->op_flags & OPf_REF) {
517 SETs((SV*)hv);
518 RETURN;
519 }
520 }
521 else {
67955e0c 522 GV *gv;
523
a0d0e21e 524 if (SvTYPE(sv) != SVt_PVGV) {
748a9306 525 char *sym;
526
a0d0e21e 527 if (SvGMAGICAL(sv)) {
528 mg_get(sv);
529 if (SvROK(sv))
530 goto wasref;
531 }
532 if (!SvOK(sv)) {
533 if (op->op_flags & OPf_REF ||
534 op->op_private & HINT_STRICT_REFS)
535 DIE(no_usym, "a HASH");
d83e6520 536 if (dowarn)
537 warn(warn_uninit);
4633a7c4 538 if (GIMME == G_ARRAY) {
539 SP--;
540 RETURN;
541 }
a0d0e21e 542 RETSETUNDEF;
543 }
748a9306 544 sym = SvPV(sv,na);
a0d0e21e 545 if (op->op_private & HINT_STRICT_REFS)
748a9306 546 DIE(no_symref, sym, "a HASH");
67955e0c 547 gv = (GV*)gv_fetchpv(sym, TRUE, SVt_PVHV);
548 } else {
549 gv = (GV*)sv;
a0d0e21e 550 }
67955e0c 551 hv = GvHVn(gv);
a0d0e21e 552 if (op->op_private & OPpLVAL_INTRO)
67955e0c 553 hv = save_hash(gv);
a0d0e21e 554 if (op->op_flags & OPf_REF) {
555 SETs((SV*)hv);
556 RETURN;
557 }
558 }
559 }
560
561 if (GIMME == G_ARRAY) { /* array wanted */
562 *stack_sp = (SV*)hv;
563 return do_kv(ARGS);
564 }
565 else {
566 dTARGET;
567 if (HvFILL(hv)) {
9607fc9c 568 sprintf(buf, "%ld/%ld", (long)HvFILL(hv), (long)HvMAX(hv)+1);
a0d0e21e 569 sv_setpv(TARG, buf);
570 }
571 else
572 sv_setiv(TARG, 0);
573 SETTARG;
574 RETURN;
575 }
576}
577
578PP(pp_aassign)
579{
580 dSP;
581 SV **lastlelem = stack_sp;
582 SV **lastrelem = stack_base + POPMARK;
583 SV **firstrelem = stack_base + POPMARK + 1;
584 SV **firstlelem = lastrelem + 1;
585
586 register SV **relem;
587 register SV **lelem;
588
589 register SV *sv;
590 register AV *ary;
591
54310121 592 I32 gimme;
a0d0e21e 593 HV *hash;
594 I32 i;
595 int magic;
596
597 delaymagic = DM_DELAY; /* catch simultaneous items */
598
599 /* If there's a common identifier on both sides we have to take
600 * special care that assigning the identifier on the left doesn't
601 * clobber a value on the right that's used later in the list.
602 */
603 if (op->op_private & OPpASSIGN_COMMON) {
604 for (relem = firstrelem; relem <= lastrelem; relem++) {
605 /*SUPPRESS 560*/
606 if (sv = *relem)
607 *relem = sv_mortalcopy(sv);
608 }
609 }
610
611 relem = firstrelem;
612 lelem = firstlelem;
613 ary = Null(AV*);
614 hash = Null(HV*);
615 while (lelem <= lastlelem) {
bbce6d69 616 TAINT_NOT; /* Each item stands on its own, taintwise. */
a0d0e21e 617 sv = *lelem++;
618 switch (SvTYPE(sv)) {
619 case SVt_PVAV:
620 ary = (AV*)sv;
748a9306 621 magic = SvMAGICAL(ary) != 0;
a0d0e21e 622
623 av_clear(ary);
7e42bd57 624 av_extend(ary, lastrelem - relem);
a0d0e21e 625 i = 0;
626 while (relem <= lastrelem) { /* gobble up all the rest */
627 sv = NEWSV(28,0);
628 assert(*relem);
629 sv_setsv(sv,*relem);
630 *(relem++) = sv;
631 (void)av_store(ary,i++,sv);
632 if (magic)
633 mg_set(sv);
bbce6d69 634 TAINT_NOT;
a0d0e21e 635 }
636 break;
637 case SVt_PVHV: {
a0d0e21e 638 SV *tmpstr;
639
640 hash = (HV*)sv;
748a9306 641 magic = SvMAGICAL(hash) != 0;
a0d0e21e 642 hv_clear(hash);
643
644 while (relem < lastrelem) { /* gobble up all the rest */
645 STRLEN len;
4633a7c4 646 if (*relem)
a0d0e21e 647 sv = *(relem++);
4633a7c4 648 else
a0d0e21e 649 sv = &sv_no, relem++;
a0d0e21e 650 tmpstr = NEWSV(29,0);
651 if (*relem)
652 sv_setsv(tmpstr,*relem); /* value */
653 *(relem++) = tmpstr;
760ac839 654 (void)hv_store_ent(hash,sv,tmpstr,0);
a0d0e21e 655 if (magic)
656 mg_set(tmpstr);
bbce6d69 657 TAINT_NOT;
8e07c86e 658 }
760ac839 659 if (relem == lastrelem)
660 warn("Odd number of elements in hash list");
a0d0e21e 661 }
662 break;
663 default:
664 if (SvTHINKFIRST(sv)) {
665 if (SvREADONLY(sv) && curcop != &compiling) {
666 if (sv != &sv_undef && sv != &sv_yes && sv != &sv_no)
667 DIE(no_modify);
668 if (relem <= lastrelem)
669 relem++;
670 break;
671 }
672 if (SvROK(sv))
673 sv_unref(sv);
674 }
675 if (relem <= lastrelem) {
676 sv_setsv(sv, *relem);
677 *(relem++) = sv;
678 }
679 else
680 sv_setsv(sv, &sv_undef);
681 SvSETMAGIC(sv);
682 break;
683 }
684 }
685 if (delaymagic & ~DM_DELAY) {
686 if (delaymagic & DM_UID) {
687#ifdef HAS_SETRESUID
688 (void)setresuid(uid,euid,(Uid_t)-1);
56febc5e 689#else
690# ifdef HAS_SETREUID
a0d0e21e 691 (void)setreuid(uid,euid);
56febc5e 692# else
693# ifdef HAS_SETRUID
a0d0e21e 694 if ((delaymagic & DM_UID) == DM_RUID) {
695 (void)setruid(uid);
748a9306 696 delaymagic &= ~DM_RUID;
a0d0e21e 697 }
56febc5e 698# endif /* HAS_SETRUID */
699# ifdef HAS_SETEUID
a0d0e21e 700 if ((delaymagic & DM_UID) == DM_EUID) {
701 (void)seteuid(uid);
748a9306 702 delaymagic &= ~DM_EUID;
a0d0e21e 703 }
56febc5e 704# endif /* HAS_SETEUID */
a0d0e21e 705 if (delaymagic & DM_UID) {
706 if (uid != euid)
707 DIE("No setreuid available");
708 (void)setuid(uid);
709 }
56febc5e 710# endif /* HAS_SETREUID */
711#endif /* HAS_SETRESUID */
a0d0e21e 712 uid = (int)getuid();
713 euid = (int)geteuid();
714 }
715 if (delaymagic & DM_GID) {
716#ifdef HAS_SETRESGID
717 (void)setresgid(gid,egid,(Gid_t)-1);
56febc5e 718#else
719# ifdef HAS_SETREGID
a0d0e21e 720 (void)setregid(gid,egid);
56febc5e 721# else
722# ifdef HAS_SETRGID
a0d0e21e 723 if ((delaymagic & DM_GID) == DM_RGID) {
724 (void)setrgid(gid);
748a9306 725 delaymagic &= ~DM_RGID;
a0d0e21e 726 }
56febc5e 727# endif /* HAS_SETRGID */
728# ifdef HAS_SETEGID
a0d0e21e 729 if ((delaymagic & DM_GID) == DM_EGID) {
730 (void)setegid(gid);
748a9306 731 delaymagic &= ~DM_EGID;
a0d0e21e 732 }
56febc5e 733# endif /* HAS_SETEGID */
a0d0e21e 734 if (delaymagic & DM_GID) {
735 if (gid != egid)
736 DIE("No setregid available");
737 (void)setgid(gid);
738 }
56febc5e 739# endif /* HAS_SETREGID */
740#endif /* HAS_SETRESGID */
a0d0e21e 741 gid = (int)getgid();
742 egid = (int)getegid();
743 }
4633a7c4 744 tainting |= (uid && (euid != uid || egid != gid));
a0d0e21e 745 }
746 delaymagic = 0;
54310121 747
748 gimme = GIMME_V;
749 if (gimme == G_VOID)
750 SP = firstrelem - 1;
751 else if (gimme == G_SCALAR) {
752 dTARGET;
753 SP = firstrelem;
754 SETi(lastrelem - firstrelem + 1);
755 }
756 else {
a0d0e21e 757 if (ary || hash)
758 SP = lastrelem;
759 else
760 SP = firstrelem + (lastlelem - firstlelem);
0c8c7a05 761 lelem = firstlelem + (relem - firstrelem);
5f05dabc 762 while (relem <= SP)
0c8c7a05 763 *relem++ = (lelem <= lastlelem) ? *lelem++ : &sv_undef;
a0d0e21e 764 }
54310121 765 RETURN;
a0d0e21e 766}
767
768PP(pp_match)
769{
770 dSP; dTARG;
771 register PMOP *pm = cPMOP;
772 register char *t;
773 register char *s;
774 char *strend;
775 I32 global;
776 I32 safebase;
777 char *truebase;
778 register REGEXP *rx = pm->op_pmregexp;
779 I32 gimme = GIMME;
780 STRLEN len;
748a9306 781 I32 minmatch = 0;
4633a7c4 782 I32 oldsave = savestack_ix;
f86702cc 783 I32 update_minmatch = 1;
a0d0e21e 784
785 if (op->op_flags & OPf_STACKED)
786 TARG = POPs;
787 else {
788 TARG = GvSV(defgv);
789 EXTEND(SP,1);
790 }
791 s = SvPV(TARG, len);
792 strend = s + len;
793 if (!s)
794 DIE("panic: do_match");
9212bbba 795 TAINT_NOT;
a0d0e21e 796
797 if (pm->op_pmflags & PMf_USED) {
798 if (gimme == G_ARRAY)
799 RETURN;
800 RETPUSHNO;
801 }
802
803 if (!rx->prelen && curpm) {
804 pm = curpm;
805 rx = pm->op_pmregexp;
806 }
807 truebase = t = s;
808 if (global = pm->op_pmflags & PMf_GLOBAL) {
809 rx->startp[0] = 0;
810 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
811 MAGIC* mg = mg_find(TARG, 'g');
748a9306 812 if (mg && mg->mg_len >= 0) {
a0d0e21e 813 rx->endp[0] = rx->startp[0] = s + mg->mg_len;
748a9306 814 minmatch = (mg->mg_flags & MGf_MINMATCH);
f86702cc 815 update_minmatch = 0;
748a9306 816 }
a0d0e21e 817 }
818 }
748a9306 819 if (!rx->nparens && !global)
820 gimme = G_SCALAR; /* accidental array context? */
5f05dabc 821 safebase = (((gimme == G_ARRAY) || global) && !sawampersand);
a0d0e21e 822 if (pm->op_pmflags & (PMf_MULTILINE|PMf_SINGLELINE)) {
823 SAVEINT(multiline);
824 multiline = pm->op_pmflags & PMf_MULTILINE;
825 }
826
827play_it_again:
828 if (global && rx->startp[0]) {
829 t = s = rx->endp[0];
5f05dabc 830 if (s >= strend)
a0d0e21e 831 goto nope;
f86702cc 832 if (update_minmatch++)
833 minmatch = (s == rx->startp[0]);
a0d0e21e 834 }
835 if (pm->op_pmshort) {
836 if (pm->op_pmflags & PMf_SCANFIRST) {
837 if (SvSCREAM(TARG)) {
838 if (screamfirst[BmRARE(pm->op_pmshort)] < 0)
839 goto nope;
840 else if (!(s = screaminstr(TARG, pm->op_pmshort)))
841 goto nope;
842 else if (pm->op_pmflags & PMf_ALL)
843 goto yup;
844 }
845 else if (!(s = fbm_instr((unsigned char*)s,
846 (unsigned char*)strend, pm->op_pmshort)))
847 goto nope;
848 else if (pm->op_pmflags & PMf_ALL)
849 goto yup;
850 if (s && rx->regback >= 0) {
851 ++BmUSEFUL(pm->op_pmshort);
852 s -= rx->regback;
853 if (s < t)
854 s = t;
855 }
856 else
857 s = t;
858 }
859 else if (!multiline) {
bbce6d69 860 if (*SvPVX(pm->op_pmshort) != *s
861 || (pm->op_pmslen > 1
36477c24 862 && memNE(SvPVX(pm->op_pmshort), s, pm->op_pmslen)))
bbce6d69 863 goto nope;
a0d0e21e 864 }
865 if (!rx->naughty && --BmUSEFUL(pm->op_pmshort) < 0) {
866 SvREFCNT_dec(pm->op_pmshort);
867 pm->op_pmshort = Nullsv; /* opt is being useless */
868 }
869 }
e50aee73 870 if (pregexec(rx, s, strend, truebase, minmatch,
bbce6d69 871 SvSCREAM(TARG) ? TARG : Nullsv, safebase))
872 {
a0d0e21e 873 curpm = pm;
874 if (pm->op_pmflags & PMf_ONCE)
875 pm->op_pmflags |= PMf_USED;
876 goto gotcha;
877 }
878 else
879 goto ret_no;
880 /*NOTREACHED*/
881
882 gotcha:
9212bbba 883 TAINT_IF(rx->exec_tainted);
a0d0e21e 884 if (gimme == G_ARRAY) {
885 I32 iters, i, len;
886
887 iters = rx->nparens;
888 if (global && !iters)
889 i = 1;
890 else
891 i = 0;
892 EXTEND(SP, iters + i);
bbce6d69 893 EXTEND_MORTAL(iters + i);
a0d0e21e 894 for (i = !i; i <= iters; i++) {
895 PUSHs(sv_newmortal());
896 /*SUPPRESS 560*/
897 if ((s = rx->startp[i]) && rx->endp[i] ) {
898 len = rx->endp[i] - s;
899 sv_setpvn(*SP, s, len);
900 }
901 }
902 if (global) {
903 truebase = rx->subbeg;
5f05dabc 904 strend = rx->subend;
a0d0e21e 905 if (rx->startp[0] && rx->startp[0] == rx->endp[0])
906 ++rx->endp[0];
907 goto play_it_again;
908 }
4633a7c4 909 LEAVE_SCOPE(oldsave);
a0d0e21e 910 RETURN;
911 }
912 else {
913 if (global) {
914 MAGIC* mg = 0;
915 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG))
916 mg = mg_find(TARG, 'g');
917 if (!mg) {
918 sv_magic(TARG, (SV*)0, 'g', Nullch, 0);
919 mg = mg_find(TARG, 'g');
920 }
748a9306 921 if (rx->startp[0]) {
5f05dabc 922 mg->mg_len = rx->endp[0] - rx->subbeg;
748a9306 923 if (rx->startp[0] == rx->endp[0])
924 mg->mg_flags |= MGf_MINMATCH;
925 else
926 mg->mg_flags &= ~MGf_MINMATCH;
927 }
a0d0e21e 928 }
4633a7c4 929 LEAVE_SCOPE(oldsave);
a0d0e21e 930 RETPUSHYES;
931 }
932
933yup:
9212bbba 934 TAINT_IF(rx->exec_tainted);
a0d0e21e 935 ++BmUSEFUL(pm->op_pmshort);
936 curpm = pm;
937 if (pm->op_pmflags & PMf_ONCE)
938 pm->op_pmflags |= PMf_USED;
5f05dabc 939 Safefree(rx->subbase);
940 rx->subbase = Nullch;
a0d0e21e 941 if (global) {
942 rx->subbeg = truebase;
943 rx->subend = strend;
944 rx->startp[0] = s;
945 rx->endp[0] = s + SvCUR(pm->op_pmshort);
946 goto gotcha;
947 }
948 if (sawampersand) {
949 char *tmps;
950
a0d0e21e 951 tmps = rx->subbase = savepvn(t, strend-t);
952 rx->subbeg = tmps;
953 rx->subend = tmps + (strend-t);
954 tmps = rx->startp[0] = tmps + (s - t);
955 rx->endp[0] = tmps + SvCUR(pm->op_pmshort);
956 }
4633a7c4 957 LEAVE_SCOPE(oldsave);
a0d0e21e 958 RETPUSHYES;
959
960nope:
961 if (pm->op_pmshort)
962 ++BmUSEFUL(pm->op_pmshort);
963
964ret_no:
4633a7c4 965 LEAVE_SCOPE(oldsave);
a0d0e21e 966 if (gimme == G_ARRAY)
967 RETURN;
968 RETPUSHNO;
969}
970
971OP *
972do_readline()
973{
974 dSP; dTARGETSTACKED;
975 register SV *sv;
976 STRLEN tmplen = 0;
977 STRLEN offset;
760ac839 978 PerlIO *fp;
a0d0e21e 979 register IO *io = GvIO(last_in_gv);
980 register I32 type = op->op_type;
54310121 981 I32 gimme = GIMME_V;
e79b0511 982 MAGIC *mg;
a0d0e21e 983
e79b0511 984 if (SvMAGICAL(last_in_gv) && (mg = mg_find((SV*)last_in_gv, 'q'))) {
985 PUSHMARK(SP);
986 XPUSHs(mg->mg_obj);
987 PUTBACK;
988 ENTER;
54310121 989 perl_call_method("READLINE", gimme);
e79b0511 990 LEAVE;
991 SPAGAIN;
54310121 992 if (gimme == G_SCALAR)
993 SvSetMagicSV_nosteal(TARG, TOPs);
e79b0511 994 RETURN;
995 }
a0d0e21e 996 fp = Nullfp;
997 if (io) {
998 fp = IoIFP(io);
999 if (!fp) {
1000 if (IoFLAGS(io) & IOf_ARGV) {
1001 if (IoFLAGS(io) & IOf_START) {
1002 IoFLAGS(io) &= ~IOf_START;
1003 IoLINES(io) = 0;
1004 if (av_len(GvAVn(last_in_gv)) < 0) {
1005 SV *tmpstr = newSVpv("-", 1); /* assume stdin */
1006 av_push(GvAVn(last_in_gv), tmpstr);
1007 }
1008 }
1009 fp = nextargv(last_in_gv);
1010 if (!fp) { /* Note: fp != IoIFP(io) */
1011 (void)do_close(last_in_gv, FALSE); /* now it does*/
1012 IoFLAGS(io) |= IOf_START;
1013 }
1014 }
1015 else if (type == OP_GLOB) {
1016 SV *tmpcmd = NEWSV(55, 0);
1017 SV *tmpglob = POPs;
1018 ENTER;
1019 SAVEFREESV(tmpcmd);
1020#ifdef VMS /* expand the wildcards right here, rather than opening a pipe, */
1021 /* since spawning off a process is a real performance hit */
1022 {
1023#include <descrip.h>
1024#include <lib$routines.h>
1025#include <nam.h>
1026#include <rmsdef.h>
1027 char rslt[NAM$C_MAXRSS+1+sizeof(unsigned short int)] = {'\0','\0'};
1028 char vmsspec[NAM$C_MAXRSS+1];
1029 char *rstr = rslt + sizeof(unsigned short int), *begin, *end, *cp;
1030 char tmpfnam[L_tmpnam] = "SYS$SCRATCH:";
1031 $DESCRIPTOR(dfltdsc,"SYS$DISK:[]*.*;");
760ac839 1032 PerlIO *tmpfp;
a0d0e21e 1033 STRLEN i;
1034 struct dsc$descriptor_s wilddsc
1035 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
1036 struct dsc$descriptor_vs rsdsc
1037 = {sizeof rslt, DSC$K_DTYPE_VT, DSC$K_CLASS_VS, rslt};
1038 unsigned long int cxt = 0, sts = 0, ok = 1, hasdir = 0, hasver = 0, isunix = 0;
1039
1040 /* We could find out if there's an explicit dev/dir or version
1041 by peeking into lib$find_file's internal context at
1042 ((struct NAM *)((struct FAB *)cxt)->fab$l_nam)->nam$l_fnb
1043 but that's unsupported, so I don't want to do it now and
1044 have it bite someone in the future. */
1045 strcat(tmpfnam,tmpnam(NULL));
1046 cp = SvPV(tmpglob,i);
1047 for (; i; i--) {
1048 if (cp[i] == ';') hasver = 1;
1049 if (cp[i] == '.') {
1050 if (sts) hasver = 1;
1051 else sts = 1;
1052 }
1053 if (cp[i] == '/') {
1054 hasdir = isunix = 1;
1055 break;
748a9306 1056 }
a0d0e21e 1057 if (cp[i] == ']' || cp[i] == '>' || cp[i] == ':') {
1058 hasdir = 1;
1059 break;
1060 }
1061 }
760ac839 1062 if ((tmpfp = PerlIO_open(tmpfnam,"w+","fop=dlt")) != NULL) {
a0d0e21e 1063 ok = ((wilddsc.dsc$a_pointer = tovmsspec(SvPVX(tmpglob),vmsspec)) != NULL);
1064 if (ok) wilddsc.dsc$w_length = (unsigned short int) strlen(wilddsc.dsc$a_pointer);
1065 while (ok && ((sts = lib$find_file(&wilddsc,&rsdsc,&cxt,
1066 &dfltdsc,NULL,NULL,NULL))&1)) {
1067 end = rstr + (unsigned long int) *rslt;
1068 if (!hasver) while (*end != ';') end--;
1069 *(end++) = '\n'; *end = '\0';
1070 for (cp = rstr; *cp; cp++) *cp = _tolower(*cp);
1071 if (hasdir) {
f86702cc 1072 if (isunix) trim_unixpath(rstr,SvPVX(tmpglob),1);
a0d0e21e 1073 begin = rstr;
1074 }
1075 else {
1076 begin = end;
1077 while (*(--begin) != ']' && *begin != '>') ;
1078 ++begin;
1079 }
760ac839 1080 ok = (PerlIO_puts(tmpfp,begin) != EOF);
a0d0e21e 1081 }
1082 if (cxt) (void)lib$find_file_end(&cxt);
748a9306 1083 if (ok && sts != RMS$_NMF &&
1084 sts != RMS$_DNF && sts != RMS$_FNF) ok = 0;
a0d0e21e 1085 if (!ok) {
c07a80fd 1086 if (!(sts & 1)) {
1087 SETERRNO((sts == RMS$_SYN ? EINVAL : EVMSERR),sts);
1088 }
760ac839 1089 PerlIO_close(tmpfp);
a0d0e21e 1090 fp = NULL;
1091 }
1092 else {
760ac839 1093 PerlIO_rewind(tmpfp);
a0d0e21e 1094 IoTYPE(io) = '<';
1095 IoIFP(io) = fp = tmpfp;
1e422769 1096 IoFLAGS(io) &= ~IOf_UNTAINT; /* maybe redundant */
a0d0e21e 1097 }
1098 }
1099 }
1100#else /* !VMS */
1101#ifdef DOSISH
67955e0c 1102#ifdef OS2
1103 sv_setpv(tmpcmd, "for a in ");
1104 sv_catsv(tmpcmd, tmpglob);
1105 sv_catpv(tmpcmd, "; do echo \"$a\\0\\c\"; done |");
1106#else
a0d0e21e 1107 sv_setpv(tmpcmd, "perlglob ");
1108 sv_catsv(tmpcmd, tmpglob);
1109 sv_catpv(tmpcmd, " |");
67955e0c 1110#endif /* !OS2 */
1111#else /* !DOSISH */
1112#if defined(CSH)
a0d0e21e 1113 sv_setpvn(tmpcmd, cshname, cshlen);
1114 sv_catpv(tmpcmd, " -cf 'set nonomatch; glob ");
1115 sv_catsv(tmpcmd, tmpglob);
16d20bd9 1116 sv_catpv(tmpcmd, "' 2>/dev/null |");
a0d0e21e 1117#else
1118 sv_setpv(tmpcmd, "echo ");
1119 sv_catsv(tmpcmd, tmpglob);
1120#if 'z' - 'a' == 25
1121 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\012\\012\\012\\012'|");
1122#else
1123 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\n\\n\\n\\n'|");
1124#endif
1125#endif /* !CSH */
67955e0c 1126#endif /* !DOSISH */
c07a80fd 1127 (void)do_open(last_in_gv, SvPVX(tmpcmd), SvCUR(tmpcmd),
1128 FALSE, 0, 0, Nullfp);
a0d0e21e 1129 fp = IoIFP(io);
1130#endif /* !VMS */
1131 LEAVE;
1132 }
1133 }
1134 else if (type == OP_GLOB)
1135 SP--;
1136 }
1137 if (!fp) {
4633a7c4 1138 if (dowarn && io && !(IoFLAGS(io) & IOf_START))
a0d0e21e 1139 warn("Read on closed filehandle <%s>", GvENAME(last_in_gv));
54310121 1140 if (gimme == G_SCALAR) {
a0d0e21e 1141 (void)SvOK_off(TARG);
1142 PUSHTARG;
1143 }
1144 RETURN;
1145 }
54310121 1146 if (gimme == G_SCALAR) {
a0d0e21e 1147 sv = TARG;
9607fc9c 1148 if (SvROK(sv))
1149 sv_unref(sv);
a0d0e21e 1150 (void)SvUPGRADE(sv, SVt_PV);
1151 tmplen = SvLEN(sv); /* remember if already alloced */
1152 if (!tmplen)
1153 Sv_Grow(sv, 80); /* try short-buffering it */
1154 if (type == OP_RCATLINE)
1155 offset = SvCUR(sv);
1156 else
1157 offset = 0;
1158 }
54310121 1159 else {
1160 sv = sv_2mortal(NEWSV(57, 80));
1161 offset = 0;
1162 }
a0d0e21e 1163 for (;;) {
1164 if (!sv_gets(sv, fp, offset)) {
760ac839 1165 PerlIO_clearerr(fp);
a0d0e21e 1166 if (IoFLAGS(io) & IOf_ARGV) {
1167 fp = nextargv(last_in_gv);
1168 if (fp)
1169 continue;
1170 (void)do_close(last_in_gv, FALSE);
1171 IoFLAGS(io) |= IOf_START;
1172 }
1173 else if (type == OP_GLOB) {
1174 (void)do_close(last_in_gv, FALSE);
1175 }
54310121 1176 if (gimme == G_SCALAR) {
a0d0e21e 1177 (void)SvOK_off(TARG);
1178 PUSHTARG;
1179 }
1180 RETURN;
1181 }
bbce6d69 1182 /* This should not be marked tainted if the fp is marked clean */
1183 if (!(IoFLAGS(io) & IOf_UNTAINT)) {
1184 TAINT;
1185 SvTAINTED_on(sv);
1186 }
a0d0e21e 1187 IoLINES(io)++;
71be2cbc 1188 SvSETMAGIC(sv);
a0d0e21e 1189 XPUSHs(sv);
a0d0e21e 1190 if (type == OP_GLOB) {
1191 char *tmps;
1192
c07a80fd 1193 if (SvCUR(sv) > 0 && SvCUR(rs) > 0) {
1194 tmps = SvEND(sv) - 1;
1195 if (*tmps == *SvPVX(rs)) {
1196 *tmps = '\0';
1197 SvCUR(sv)--;
1198 }
1199 }
a0d0e21e 1200 for (tmps = SvPVX(sv); *tmps; tmps++)
1201 if (!isALPHA(*tmps) && !isDIGIT(*tmps) &&
1202 strchr("$&*(){}[]'\";\\|?<>~`", *tmps))
1203 break;
1204 if (*tmps && Stat(SvPVX(sv), &statbuf) < 0) {
1205 (void)POPs; /* Unmatched wildcard? Chuck it... */
1206 continue;
1207 }
1208 }
54310121 1209 if (gimme == G_ARRAY) {
a0d0e21e 1210 if (SvLEN(sv) - SvCUR(sv) > 20) {
1211 SvLEN_set(sv, SvCUR(sv)+1);
1212 Renew(SvPVX(sv), SvLEN(sv), char);
1213 }
1214 sv = sv_2mortal(NEWSV(58, 80));
1215 continue;
1216 }
54310121 1217 else if (gimme == G_SCALAR && !tmplen && SvLEN(sv) - SvCUR(sv) > 80) {
a0d0e21e 1218 /* try to reclaim a bit of scalar space (only on 1st alloc) */
1219 if (SvCUR(sv) < 60)
1220 SvLEN_set(sv, 80);
1221 else
1222 SvLEN_set(sv, SvCUR(sv)+40); /* allow some slop */
1223 Renew(SvPVX(sv), SvLEN(sv), char);
1224 }
1225 RETURN;
1226 }
1227}
1228
1229PP(pp_enter)
1230{
1231 dSP;
1232 register CONTEXT *cx;
54310121 1233 I32 gimme = OP_GIMME(op, -1);
a0d0e21e 1234
54310121 1235 if (gimme == -1) {
1236 if (cxstack_ix >= 0)
1237 gimme = cxstack[cxstack_ix].blk_gimme;
1238 else
1239 gimme = G_SCALAR;
1240 }
a0d0e21e 1241
1242 ENTER;
1243
1244 SAVETMPS;
1245 PUSHBLOCK(cx, CXt_BLOCK, sp);
1246
1247 RETURN;
1248}
1249
1250PP(pp_helem)
1251{
1252 dSP;
760ac839 1253 HE* he;
a0d0e21e 1254 SV *keysv = POPs;
a0d0e21e 1255 HV *hv = (HV*)POPs;
68dc0745 1256 U32 lval = op->op_flags & OPf_MOD;
1257 U32 defer = op->op_private & OPpLVAL_DEFER;
a0d0e21e 1258
1259 if (SvTYPE(hv) != SVt_PVHV)
1260 RETPUSHUNDEF;
68dc0745 1261 he = hv_fetch_ent(hv, keysv, lval && !defer, 0);
a0d0e21e 1262 if (lval) {
68dc0745 1263 if (!he || HeVAL(he) == &sv_undef) {
1264 SV* lv;
1265 SV* key2;
1266 if (!defer)
1267 DIE(no_helem, SvPV(keysv, na));
1268 lv = sv_newmortal();
1269 sv_upgrade(lv, SVt_PVLV);
1270 LvTYPE(lv) = 'y';
1271 sv_magic(lv, key2 = newSVsv(keysv), 'y', Nullch, 0);
1272 SvREFCNT_dec(key2); /* sv_magic() increments refcount */
1273 LvTARG(lv) = SvREFCNT_inc(hv);
1274 LvTARGLEN(lv) = 1;
1275 PUSHs(lv);
1276 RETURN;
1277 }
5f05dabc 1278 if (op->op_private & OPpLVAL_INTRO) {
1279 if (HvNAME(hv) && isGV(HeVAL(he)))
1280 save_gp((GV*)HeVAL(he), !(op->op_flags & OPf_SPECIAL));
1281 else
1282 save_svref(&HeVAL(he));
1283 }
1284 else if (op->op_private & OPpDEREF)
68dc0745 1285 vivify_ref(HeVAL(he), op->op_private & OPpDEREF);
a0d0e21e 1286 }
760ac839 1287 PUSHs(he ? HeVAL(he) : &sv_undef);
a0d0e21e 1288 RETURN;
1289}
1290
1291PP(pp_leave)
1292{
1293 dSP;
1294 register CONTEXT *cx;
1295 register SV **mark;
1296 SV **newsp;
1297 PMOP *newpm;
1298 I32 gimme;
1299
1300 if (op->op_flags & OPf_SPECIAL) {
1301 cx = &cxstack[cxstack_ix];
1302 cx->blk_oldpm = curpm; /* fake block should preserve $1 et al */
1303 }
1304
1305 POPBLOCK(cx,newpm);
1306
54310121 1307 gimme = OP_GIMME(op, -1);
1308 if (gimme == -1) {
1309 if (cxstack_ix >= 0)
1310 gimme = cxstack[cxstack_ix].blk_gimme;
1311 else
1312 gimme = G_SCALAR;
1313 }
a0d0e21e 1314
54310121 1315 if (gimme == G_VOID)
1316 SP = newsp;
1317 else if (gimme == G_SCALAR) {
1318 MARK = newsp + 1;
1319 if (MARK <= SP)
1320 if (SvFLAGS(TOPs) & (SVs_PADTMP|SVs_TEMP))
1321 *MARK = TOPs;
1322 else
1323 *MARK = sv_mortalcopy(TOPs);
a0d0e21e 1324 else {
54310121 1325 MEXTEND(mark,0);
1326 *MARK = &sv_undef;
a0d0e21e 1327 }
54310121 1328 SP = MARK;
a0d0e21e 1329 }
54310121 1330 else if (gimme == G_ARRAY) {
a0d0e21e 1331 for (mark = newsp + 1; mark <= SP; mark++)
1332 if (!(SvFLAGS(*mark) & (SVs_PADTMP|SVs_TEMP)))
1333 *mark = sv_mortalcopy(*mark);
1334 /* in case LEAVE wipes old return values */
1335 }
1336 curpm = newpm; /* Don't pop $1 et al till now */
1337
1338 LEAVE;
1339
1340 RETURN;
1341}
1342
1343PP(pp_iter)
1344{
1345 dSP;
1346 register CONTEXT *cx;
5f05dabc 1347 SV* sv;
4633a7c4 1348 AV* av;
a0d0e21e 1349
1350 EXTEND(sp, 1);
1351 cx = &cxstack[cxstack_ix];
1352 if (cx->cx_type != CXt_LOOP)
1353 DIE("panic: pp_iter");
1354
71be2cbc 1355 av = cx->blk_loop.iterary;
1356 if (cx->blk_loop.iterix >= (av == curstack ? cx->blk_oldsp : AvFILL(av)))
a0d0e21e 1357 RETPUSHNO;
1358
7a4c00b4 1359 SvREFCNT_dec(*cx->blk_loop.itervar);
1360
5f05dabc 1361 if (sv = AvARRAY(av)[++cx->blk_loop.iterix])
a0d0e21e 1362 SvTEMP_off(sv);
a0d0e21e 1363 else
5f05dabc 1364 sv = &sv_undef;
1365 if (av != curstack && SvIMMORTAL(sv)) {
1366 SV *lv = cx->blk_loop.iterlval;
71be2cbc 1367 if (lv && SvREFCNT(lv) > 1) {
1368 SvREFCNT_dec(lv);
1369 lv = Nullsv;
1370 }
5f05dabc 1371 if (lv)
1372 SvREFCNT_dec(LvTARG(lv));
1373 else {
68dc0745 1374 lv = cx->blk_loop.iterlval = NEWSV(26, 0);
5f05dabc 1375 sv_upgrade(lv, SVt_PVLV);
5f05dabc 1376 LvTYPE(lv) = 'y';
68dc0745 1377 sv_magic(lv, Nullsv, 'y', Nullch, 0);
5f05dabc 1378 }
1379 LvTARG(lv) = SvREFCNT_inc(av);
1380 LvTARGOFF(lv) = cx->blk_loop.iterix;
68dc0745 1381 LvTARGLEN(lv) = -1;
5f05dabc 1382 sv = (SV*)lv;
1383 }
7a4c00b4 1384
1385 *cx->blk_loop.itervar = SvREFCNT_inc(sv);
a0d0e21e 1386 RETPUSHYES;
1387}
1388
1389PP(pp_subst)
1390{
1391 dSP; dTARG;
1392 register PMOP *pm = cPMOP;
1393 PMOP *rpm = pm;
1394 register SV *dstr;
1395 register char *s;
1396 char *strend;
1397 register char *m;
1398 char *c;
1399 register char *d;
1400 STRLEN clen;
1401 I32 iters = 0;
1402 I32 maxiters;
1403 register I32 i;
1404 bool once;
71be2cbc 1405 bool rxtainted;
a0d0e21e 1406 char *orig;
1407 I32 safebase;
1408 register REGEXP *rx = pm->op_pmregexp;
1409 STRLEN len;
1410 int force_on_match = 0;
4633a7c4 1411 I32 oldsave = savestack_ix;
a0d0e21e 1412
1413 if (pm->op_pmflags & PMf_CONST) /* known replacement string? */
1414 dstr = POPs;
1415 if (op->op_flags & OPf_STACKED)
1416 TARG = POPs;
1417 else {
1418 TARG = GvSV(defgv);
1419 EXTEND(SP,1);
1420 }
68dc0745 1421 if (SvREADONLY(TARG)
1422 || (SvTYPE(TARG) > SVt_PVLV
1423 && !(SvTYPE(TARG) == SVt_PVGV && SvFAKE(TARG))))
1424 croak(no_modify);
a0d0e21e 1425 s = SvPV(TARG, len);
68dc0745 1426 if (!SvPOKp(TARG) || SvTYPE(TARG) == SVt_PVGV)
a0d0e21e 1427 force_on_match = 1;
9212bbba 1428 TAINT_NOT;
a0d0e21e 1429
1430 force_it:
1431 if (!pm || !s)
1432 DIE("panic: do_subst");
1433
1434 strend = s + len;
1435 maxiters = (strend - s) + 10;
1436
1437 if (!rx->prelen && curpm) {
1438 pm = curpm;
1439 rx = pm->op_pmregexp;
1440 }
5f05dabc 1441 safebase = (!rx->nparens && !sawampersand);
a0d0e21e 1442 if (pm->op_pmflags & (PMf_MULTILINE|PMf_SINGLELINE)) {
1443 SAVEINT(multiline);
1444 multiline = pm->op_pmflags & PMf_MULTILINE;
1445 }
1446 orig = m = s;
1447 if (pm->op_pmshort) {
1448 if (pm->op_pmflags & PMf_SCANFIRST) {
1449 if (SvSCREAM(TARG)) {
1450 if (screamfirst[BmRARE(pm->op_pmshort)] < 0)
1451 goto nope;
1452 else if (!(s = screaminstr(TARG, pm->op_pmshort)))
1453 goto nope;
1454 }
1455 else if (!(s = fbm_instr((unsigned char*)s, (unsigned char*)strend,
1456 pm->op_pmshort)))
1457 goto nope;
1458 if (s && rx->regback >= 0) {
1459 ++BmUSEFUL(pm->op_pmshort);
1460 s -= rx->regback;
1461 if (s < m)
1462 s = m;
1463 }
1464 else
1465 s = m;
1466 }
1467 else if (!multiline) {
bbce6d69 1468 if (*SvPVX(pm->op_pmshort) != *s
1469 || (pm->op_pmslen > 1
36477c24 1470 && memNE(SvPVX(pm->op_pmshort), s, pm->op_pmslen)))
bbce6d69 1471 goto nope;
a0d0e21e 1472 }
1473 if (!rx->naughty && --BmUSEFUL(pm->op_pmshort) < 0) {
1474 SvREFCNT_dec(pm->op_pmshort);
1475 pm->op_pmshort = Nullsv; /* opt is being useless */
1476 }
1477 }
71be2cbc 1478
1479 /* only replace once? */
a0d0e21e 1480 once = !(rpm->op_pmflags & PMf_GLOBAL);
71be2cbc 1481
1482 /* known replacement string? */
1483 c = (rpm->op_pmflags & PMf_CONST) ? SvPV(dstr, clen) : Nullch;
1484
1485 /* can do inplace substitution? */
1486 if (c && clen <= rx->minlen) {
1487 if (! pregexec(rx, s, strend, orig, 0,
1488 SvSCREAM(TARG) ? TARG : Nullsv, safebase)) {
1489 PUSHs(&sv_no);
1490 LEAVE_SCOPE(oldsave);
1491 RETURN;
1492 }
1493 if (force_on_match) {
1494 force_on_match = 0;
1495 s = SvPV_force(TARG, len);
1496 goto force_it;
1497 }
1498 if (rx->subbase) /* oops, no we can't */
1499 goto long_way;
1500 d = s;
1501 curpm = pm;
1502 SvSCREAM_off(TARG); /* disable possible screamer */
1503 if (once) {
1504 rxtainted = rx->exec_tainted;
1505 m = rx->startp[0];
1506 d = rx->endp[0];
1507 s = orig;
1508 if (m - s > strend - d) { /* faster to shorten from end */
1509 if (clen) {
1510 Copy(c, m, clen, char);
1511 m += clen;
a0d0e21e 1512 }
71be2cbc 1513 i = strend - d;
1514 if (i > 0) {
1515 Move(d, m, i, char);
1516 m += i;
a0d0e21e 1517 }
71be2cbc 1518 *m = '\0';
1519 SvCUR_set(TARG, m - s);
1520 }
1521 /*SUPPRESS 560*/
1522 else if (i = m - s) { /* faster from front */
1523 d -= clen;
1524 m = d;
1525 sv_chop(TARG, d-i);
1526 s += i;
1527 while (i--)
1528 *--d = *--s;
1529 if (clen)
1530 Copy(c, m, clen, char);
1531 }
1532 else if (clen) {
1533 d -= clen;
1534 sv_chop(TARG, d);
1535 Copy(c, d, clen, char);
1536 }
1537 else {
1538 sv_chop(TARG, d);
1539 }
9212bbba 1540 TAINT_IF(rxtainted);
71be2cbc 1541 PUSHs(&sv_yes);
1542 }
1543 else {
1544 rxtainted = 0;
1545 do {
1546 if (iters++ > maxiters)
1547 DIE("Substitution loop");
1548 rxtainted |= rx->exec_tainted;
1549 m = rx->startp[0];
1550 /*SUPPRESS 560*/
1551 if (i = m - s) {
1552 if (s != d)
1553 Move(s, d, i, char);
1554 d += i;
a0d0e21e 1555 }
71be2cbc 1556 if (clen) {
1557 Copy(c, d, clen, char);
1558 d += clen;
1559 }
1560 s = rx->endp[0];
1561 } while (pregexec(rx, s, strend, orig, s == m,
1562 Nullsv, TRUE)); /* don't match same null twice */
1563 if (s != d) {
1564 i = strend - s;
1565 SvCUR_set(TARG, d - SvPVX(TARG) + i);
1566 Move(s, d, i+1, char); /* include the NUL */
a0d0e21e 1567 }
9212bbba 1568 TAINT_IF(rxtainted);
71be2cbc 1569 PUSHs(sv_2mortal(newSViv((I32)iters)));
a0d0e21e 1570 }
71be2cbc 1571 (void)SvPOK_only(TARG);
1572 SvSETMAGIC(TARG);
9212bbba 1573 SvTAINT(TARG);
71be2cbc 1574 LEAVE_SCOPE(oldsave);
1575 RETURN;
a0d0e21e 1576 }
71be2cbc 1577
e50aee73 1578 if (pregexec(rx, s, strend, orig, 0,
5f05dabc 1579 SvSCREAM(TARG) ? TARG : Nullsv, safebase)) {
a0d0e21e 1580 long_way:
1581 if (force_on_match) {
1582 force_on_match = 0;
1583 s = SvPV_force(TARG, len);
1584 goto force_it;
1585 }
71be2cbc 1586 rxtainted = rx->exec_tainted;
a0d0e21e 1587 dstr = NEWSV(25, sv_len(TARG));
1588 sv_setpvn(dstr, m, s-m);
1589 curpm = pm;
1590 if (!c) {
1591 register CONTEXT *cx;
1592 PUSHSUBST(cx);
1593 RETURNOP(cPMOP->op_pmreplroot);
1594 }
1595 do {
1596 if (iters++ > maxiters)
1597 DIE("Substitution loop");
71be2cbc 1598 rxtainted |= rx->exec_tainted;
a0d0e21e 1599 if (rx->subbase && rx->subbase != orig) {
1600 m = s;
1601 s = orig;
1602 orig = rx->subbase;
1603 s = orig + (m - s);
1604 strend = s + (strend - m);
1605 }
1606 m = rx->startp[0];
1607 sv_catpvn(dstr, s, m-s);
1608 s = rx->endp[0];
1609 if (clen)
1610 sv_catpvn(dstr, c, clen);
1611 if (once)
1612 break;
5f05dabc 1613 } while (pregexec(rx, s, strend, orig, s == m, Nullsv, safebase));
a0d0e21e 1614 sv_catpvn(dstr, s, strend - s);
748a9306 1615
9212bbba 1616 TAINT_IF(rxtainted);
1617
4633a7c4 1618 (void)SvOOK_off(TARG);
cb0b1708 1619 Safefree(SvPVX(TARG));
748a9306 1620 SvPVX(TARG) = SvPVX(dstr);
1621 SvCUR_set(TARG, SvCUR(dstr));
1622 SvLEN_set(TARG, SvLEN(dstr));
1623 SvPVX(dstr) = 0;
1624 sv_free(dstr);
1625
a0d0e21e 1626 (void)SvPOK_only(TARG);
1627 SvSETMAGIC(TARG);
9212bbba 1628 SvTAINT(TARG);
a0d0e21e 1629 PUSHs(sv_2mortal(newSViv((I32)iters)));
4633a7c4 1630 LEAVE_SCOPE(oldsave);
a0d0e21e 1631 RETURN;
1632 }
9212bbba 1633
a0d0e21e 1634 PUSHs(&sv_no);
4633a7c4 1635 LEAVE_SCOPE(oldsave);
a0d0e21e 1636 RETURN;
1637
1638nope:
1639 ++BmUSEFUL(pm->op_pmshort);
1640 PUSHs(&sv_no);
4633a7c4 1641 LEAVE_SCOPE(oldsave);
a0d0e21e 1642 RETURN;
1643}
1644
1645PP(pp_grepwhile)
1646{
1647 dSP;
1648
1649 if (SvTRUEx(POPs))
1650 stack_base[markstack_ptr[-1]++] = stack_base[*markstack_ptr];
1651 ++*markstack_ptr;
1652 LEAVE; /* exit inner scope */
1653
1654 /* All done yet? */
1655 if (stack_base + *markstack_ptr > sp) {
1656 I32 items;
54310121 1657 I32 gimme = GIMME_V;
a0d0e21e 1658
1659 LEAVE; /* exit outer scope */
1660 (void)POPMARK; /* pop src */
1661 items = --*markstack_ptr - markstack_ptr[-1];
1662 (void)POPMARK; /* pop dst */
1663 SP = stack_base + POPMARK; /* pop original mark */
54310121 1664 if (gimme == G_SCALAR) {
a0d0e21e 1665 dTARGET;
1666 XPUSHi(items);
a0d0e21e 1667 }
54310121 1668 else if (gimme == G_ARRAY)
1669 SP += items;
a0d0e21e 1670 RETURN;
1671 }
1672 else {
1673 SV *src;
1674
1675 ENTER; /* enter inner scope */
1676 SAVESPTR(curpm);
1677
1678 src = stack_base[*markstack_ptr];
1679 SvTEMP_off(src);
1680 GvSV(defgv) = src;
1681
1682 RETURNOP(cLOGOP->op_other);
1683 }
1684}
1685
1686PP(pp_leavesub)
1687{
1688 dSP;
1689 SV **mark;
1690 SV **newsp;
1691 PMOP *newpm;
1692 I32 gimme;
1693 register CONTEXT *cx;
f86702cc 1694 struct block_sub cxsub;
a0d0e21e 1695
1696 POPBLOCK(cx,newpm);
f86702cc 1697 POPSUB1(cx); /* Delay POPSUB2 until stack values are safe */
1698
a0d0e21e 1699 if (gimme == G_SCALAR) {
1700 MARK = newsp + 1;
1701 if (MARK <= SP)
f86702cc 1702 *MARK = SvTEMP(TOPs) ? TOPs : sv_mortalcopy(TOPs);
a0d0e21e 1703 else {
f86702cc 1704 MEXTEND(MARK, 0);
a0d0e21e 1705 *MARK = &sv_undef;
1706 }
1707 SP = MARK;
1708 }
54310121 1709 else if (gimme == G_ARRAY) {
f86702cc 1710 for (MARK = newsp + 1; MARK <= SP; MARK++) {
1711 if (!SvTEMP(*MARK))
1712 *MARK = sv_mortalcopy(*MARK);
1713 }
a0d0e21e 1714 }
f86702cc 1715 PUTBACK;
1716
1717 POPSUB2(); /* Stack values are safe: release CV and @_ ... */
1718 curpm = newpm; /* ... and pop $1 et al */
a0d0e21e 1719
1720 LEAVE;
a0d0e21e 1721 return pop_return();
1722}
1723
1724PP(pp_entersub)
1725{
1726 dSP; dPOPss;
1727 GV *gv;
1728 HV *stash;
1729 register CV *cv;
1730 register CONTEXT *cx;
5d94fbed 1731 I32 gimme;
07055b4c 1732 bool hasargs = (op->op_flags & OPf_STACKED) != 0;
a0d0e21e 1733
1734 if (!sv)
1735 DIE("Not a CODE reference");
1736 switch (SvTYPE(sv)) {
1737 default:
1738 if (!SvROK(sv)) {
748a9306 1739 char *sym;
1740
a0d0e21e 1741 if (sv == &sv_yes) /* unfound import, ignore */
1742 RETURN;
15ff848f 1743 if (SvGMAGICAL(sv)) {
1744 mg_get(sv);
1745 sym = SvPOKp(sv) ? SvPVX(sv) : Nullch;
1746 }
1747 else
1748 sym = SvPV(sv, na);
1749 if (!sym)
a0d0e21e 1750 DIE(no_usym, "a subroutine");
1751 if (op->op_private & HINT_STRICT_REFS)
748a9306 1752 DIE(no_symref, sym, "a subroutine");
1753 cv = perl_get_cv(sym, TRUE);
a0d0e21e 1754 break;
1755 }
1756 cv = (CV*)SvRV(sv);
28757baa 1757 if (SvTYPE(cv) == SVt_PVCV)
a0d0e21e 1758 break;
1759 /* FALL THROUGH */
1760 case SVt_PVHV:
1761 case SVt_PVAV:
1762 DIE("Not a CODE reference");
1763 case SVt_PVCV:
1764 cv = (CV*)sv;
1765 break;
1766 case SVt_PVGV:
8ebc5c01 1767 if (!(cv = GvCVu((GV*)sv)))
a0d0e21e 1768 cv = sv_2cv(sv, &stash, &gv, TRUE);
1769 break;
1770 }
1771
8ebc5c01 1772 ENTER;
1773 SAVETMPS;
1774
a0d0e21e 1775 retry:
1776 if (!cv)
1777 DIE("Not a CODE reference");
1778
1779 if (!CvROOT(cv) && !CvXSUB(cv)) {
44a8e56a 1780 GV* autogv;
1781 SV* subname;
1782
1783 /* anonymous or undef'd function leaves us no recourse */
1784 if (CvANON(cv) || !(gv = CvGV(cv)))
1785 DIE("Undefined subroutine called");
1786 /* autoloaded stub? */
1787 if (cv != GvCV(gv)) {
1788 cv = GvCV(gv);
1789 goto retry;
a0d0e21e 1790 }
44a8e56a 1791 /* should call AUTOLOAD now? */
54310121 1792 if ((autogv = gv_autoload4(GvSTASH(gv), GvNAME(gv), GvNAMELEN(gv),
1793 FALSE)))
1794 {
44a8e56a 1795 cv = GvCV(autogv);
1796 goto retry;
1797 }
1798 /* sorry */
1799 subname = sv_newmortal();
1800 gv_efullname3(subname, gv, Nullch);
1801 DIE("Undefined subroutine &%s called", SvPVX(subname));
a0d0e21e 1802 }
1803
54310121 1804 gimme = GIMME_V;
28757baa 1805 if ((op->op_private & OPpENTERSUB_DB) && GvCV(DBsub) && !CvNODEBUG(cv)) {
71be2cbc 1806 SV *oldsv = sv;
a0d0e21e 1807 sv = GvSV(DBsub);
1808 save_item(sv);
67955e0c 1809 gv = CvGV(cv);
71be2cbc 1810 if ( (CvFLAGS(cv) & (CVf_ANON | CVf_CLONED))
1811 || strEQ(GvNAME(gv), "END")
1812 || ((GvCV(gv) != cv) && /* Could be imported, and old sub redefined. */
1813 !( (SvTYPE(oldsv) == SVt_PVGV) && (GvCV((GV*)oldsv) == cv)
1814 && (gv = (GV*)oldsv) ))) { /* Use GV from the stack as a fallback. */
1815 /* GV is potentially non-unique, or contain different CV. */
748a9306 1816 sv_setsv(sv, newRV((SV*)cv));
a5f75d66 1817 }
748a9306 1818 else {
4f732624 1819 gv_efullname3(sv, gv, Nullch);
748a9306 1820 }
a0d0e21e 1821 cv = GvCV(DBsub);
67955e0c 1822 if (CvXSUB(cv)) curcopdb = curcop;
a0d0e21e 1823 if (!cv)
1824 DIE("No DBsub routine");
1825 }
1826
1827 if (CvXSUB(cv)) {
1828 if (CvOLDSTYLE(cv)) {
ecfc5424 1829 I32 (*fp3)_((int,int,int));
a0d0e21e 1830 dMARK;
1831 register I32 items = SP - MARK;
67955e0c 1832 /* We dont worry to copy from @_. */
a0d0e21e 1833 while (sp > mark) {
1834 sp[1] = sp[0];
1835 sp--;
1836 }
1837 stack_sp = mark + 1;
ecfc5424 1838 fp3 = (I32(*)_((int,int,int)))CvXSUB(cv);
1839 items = (*fp3)(CvXSUBANY(cv).any_i32,
1840 MARK - stack_base + 1,
1841 items);
a0d0e21e 1842 stack_sp = stack_base + items;
1843 }
1844 else {
748a9306 1845 I32 markix = TOPMARK;
1846
a0d0e21e 1847 PUTBACK;
67955e0c 1848
1849 if (!hasargs) {
1850 /* Need to copy @_ to stack. Alternative may be to
1851 * switch stack to @_, and copy return values
1852 * back. This would allow popping @_ in XSUB, e.g.. XXXX */
1853 AV* av = GvAV(defgv);
1854 I32 items = AvFILL(av) + 1;
1855
1856 if (items) {
1857 /* Mark is at the end of the stack. */
1858 EXTEND(sp, items);
1859 Copy(AvARRAY(av), sp + 1, items, SV*);
1860 sp += items;
1861 PUTBACK ;
1862 }
1863 }
1864 if (curcopdb) { /* We assume that the first
1865 XSUB in &DB::sub is the
1866 called one. */
1867 SAVESPTR(curcop);
1868 curcop = curcopdb;
1869 curcopdb = NULL;
1870 }
1871 /* Do we need to open block here? XXXX */
a0d0e21e 1872 (void)(*CvXSUB(cv))(cv);
748a9306 1873
1874 /* Enforce some sanity in scalar context. */
5d94fbed 1875 if (gimme == G_SCALAR && ++markix != stack_sp - stack_base ) {
748a9306 1876 if (markix > stack_sp - stack_base)
1877 *(stack_base + markix) = &sv_undef;
1878 else
1879 *(stack_base + markix) = *stack_sp;
1880 stack_sp = stack_base + markix;
1881 }
a0d0e21e 1882 }
1883 LEAVE;
1884 return NORMAL;
1885 }
1886 else {
1887 dMARK;
1888 register I32 items = SP - MARK;
a0d0e21e 1889 AV* padlist = CvPADLIST(cv);
1890 SV** svp = AvARRAY(padlist);
1891 push_return(op->op_next);
1892 PUSHBLOCK(cx, CXt_SUB, MARK);
1893 PUSHSUB(cx);
1894 CvDEPTH(cv)++;
1895 if (CvDEPTH(cv) < 2)
1896 (void)SvREFCNT_inc(cv);
1897 else { /* save temporaries on recursion? */
5f05dabc 1898 if (CvDEPTH(cv) == 100 && dowarn
44a8e56a 1899 && !(perldb && cv == GvCV(DBsub)))
1900 sub_crush_depth(cv);
a0d0e21e 1901 if (CvDEPTH(cv) > AvFILL(padlist)) {
1902 AV *av;
1903 AV *newpad = newAV();
4aa0a1f7 1904 SV **oldpad = AvARRAY(svp[CvDEPTH(cv)-1]);
a0d0e21e 1905 I32 ix = AvFILL((AV*)svp[1]);
1906 svp = AvARRAY(svp[0]);
748a9306 1907 for ( ;ix > 0; ix--) {
a0d0e21e 1908 if (svp[ix] != &sv_undef) {
748a9306 1909 char *name = SvPVX(svp[ix]);
5f05dabc 1910 if ((SvFLAGS(svp[ix]) & SVf_FAKE) /* outer lexical? */
1911 || *name == '&') /* anonymous code? */
1912 {
1913 av_store(newpad, ix, SvREFCNT_inc(oldpad[ix]));
748a9306 1914 }
1915 else { /* our own lexical */
1916 if (*name == '@')
1917 av_store(newpad, ix, sv = (SV*)newAV());
1918 else if (*name == '%')
1919 av_store(newpad, ix, sv = (SV*)newHV());
1920 else
1921 av_store(newpad, ix, sv = NEWSV(0,0));
1922 SvPADMY_on(sv);
1923 }
a0d0e21e 1924 }
1925 else {
748a9306 1926 av_store(newpad, ix, sv = NEWSV(0,0));
a0d0e21e 1927 SvPADTMP_on(sv);
1928 }
1929 }
1930 av = newAV(); /* will be @_ */
1931 av_extend(av, 0);
1932 av_store(newpad, 0, (SV*)av);
1933 AvFLAGS(av) = AVf_REIFY;
1934 av_store(padlist, CvDEPTH(cv), (SV*)newpad);
1935 AvFILL(padlist) = CvDEPTH(cv);
1936 svp = AvARRAY(padlist);
1937 }
1938 }
1939 SAVESPTR(curpad);
1940 curpad = AvARRAY((AV*)svp[CvDEPTH(cv)]);
1941 if (hasargs) {
1942 AV* av = (AV*)curpad[0];
1943 SV** ary;
1944
1945 if (AvREAL(av)) {
1946 av_clear(av);
1947 AvREAL_off(av);
1948 }
1949 cx->blk_sub.savearray = GvAV(defgv);
1950 cx->blk_sub.argarray = av;
0c8c7a05 1951 GvAV(defgv) = (AV*)SvREFCNT_inc(av);
a0d0e21e 1952 ++MARK;
1953
1954 if (items > AvMAX(av) + 1) {
1955 ary = AvALLOC(av);
1956 if (AvARRAY(av) != ary) {
1957 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
1958 SvPVX(av) = (char*)ary;
1959 }
1960 if (items > AvMAX(av) + 1) {
1961 AvMAX(av) = items - 1;
1962 Renew(ary,items,SV*);
1963 AvALLOC(av) = ary;
1964 SvPVX(av) = (char*)ary;
1965 }
1966 }
1967 Copy(MARK,AvARRAY(av),items,SV*);
1968 AvFILL(av) = items - 1;
1969
1970 while (items--) {
1971 if (*MARK)
1972 SvTEMP_off(*MARK);
1973 MARK++;
1974 }
1975 }
1976 RETURNOP(CvSTART(cv));
1977 }
1978}
1979
44a8e56a 1980void
1981sub_crush_depth(cv)
1982CV* cv;
1983{
1984 if (CvANON(cv))
1985 warn("Deep recursion on anonymous subroutine");
1986 else {
1987 SV* tmpstr = sv_newmortal();
1988 gv_efullname3(tmpstr, CvGV(cv), Nullch);
1989 warn("Deep recursion on subroutine \"%s\"", SvPVX(tmpstr));
1990 }
1991}
1992
a0d0e21e 1993PP(pp_aelem)
1994{
1995 dSP;
1996 SV** svp;
748a9306 1997 I32 elem = POPi;
68dc0745 1998 AV* av = (AV*)POPs;
1999 U32 lval = op->op_flags & OPf_MOD;
2000 U32 defer = (op->op_private & OPpLVAL_DEFER) && (elem > AvFILL(av));
a0d0e21e 2001
748a9306 2002 if (elem > 0)
2003 elem -= curcop->cop_arybase;
a0d0e21e 2004 if (SvTYPE(av) != SVt_PVAV)
2005 RETPUSHUNDEF;
68dc0745 2006 svp = av_fetch(av, elem, lval && !defer);
a0d0e21e 2007 if (lval) {
68dc0745 2008 if (!svp || *svp == &sv_undef) {
2009 SV* lv;
2010 if (!defer)
2011 DIE(no_aelem, elem);
2012 lv = sv_newmortal();
2013 sv_upgrade(lv, SVt_PVLV);
2014 LvTYPE(lv) = 'y';
2015 sv_magic(lv, Nullsv, 'y', Nullch, 0);
2016 LvTARG(lv) = SvREFCNT_inc(av);
2017 LvTARGOFF(lv) = elem;
2018 LvTARGLEN(lv) = 1;
2019 PUSHs(lv);
2020 RETURN;
2021 }
a0d0e21e 2022 if (op->op_private & OPpLVAL_INTRO)
2023 save_svref(svp);
5f05dabc 2024 else if (op->op_private & OPpDEREF)
68dc0745 2025 vivify_ref(*svp, op->op_private & OPpDEREF);
a0d0e21e 2026 }
2027 PUSHs(svp ? *svp : &sv_undef);
2028 RETURN;
2029}
2030
02a9e968 2031void
68dc0745 2032vivify_ref(sv, to_what)
02a9e968 2033SV* sv;
68dc0745 2034U32 to_what;
02a9e968 2035{
2036 if (SvGMAGICAL(sv))
2037 mg_get(sv);
2038 if (!SvOK(sv)) {
2039 if (SvREADONLY(sv))
2040 croak(no_modify);
5f05dabc 2041 if (SvTYPE(sv) < SVt_RV)
2042 sv_upgrade(sv, SVt_RV);
2043 else if (SvTYPE(sv) >= SVt_PV) {
2044 (void)SvOOK_off(sv);
2045 Safefree(SvPVX(sv));
2046 SvLEN(sv) = SvCUR(sv) = 0;
2047 }
68dc0745 2048 switch (to_what) {
5f05dabc 2049 case OPpDEREF_SV:
2050 SvRV(sv) = newSV(0);
2051 break;
2052 case OPpDEREF_AV:
2053 SvRV(sv) = (SV*)newAV();
2054 break;
2055 case OPpDEREF_HV:
2056 SvRV(sv) = (SV*)newHV();
2057 break;
2058 }
02a9e968 2059 SvROK_on(sv);
2060 SvSETMAGIC(sv);
2061 }
2062}
2063
a0d0e21e 2064PP(pp_method)
2065{
2066 dSP;
2067 SV* sv;
2068 SV* ob;
2069 GV* gv;
2070 SV* nm;
2071
2072 nm = TOPs;
2073 sv = *(stack_base + TOPMARK + 1);
2074
2075 gv = 0;
16d20bd9 2076 if (SvGMAGICAL(sv))
2077 mg_get(sv);
a0d0e21e 2078 if (SvROK(sv))
16d20bd9 2079 ob = (SV*)SvRV(sv);
a0d0e21e 2080 else {
2081 GV* iogv;
2082 char* packname = 0;
67955e0c 2083 STRLEN packlen;
a0d0e21e 2084
2085 if (!SvOK(sv) ||
67955e0c 2086 !(packname = SvPV(sv, packlen)) ||
a0d0e21e 2087 !(iogv = gv_fetchpv(packname, FALSE, SVt_PVIO)) ||
2088 !(ob=(SV*)GvIO(iogv)))
2089 {
2090 char *name = SvPV(nm, na);
2091 HV *stash;
2092 if (!packname || !isALPHA(*packname))
2093DIE("Can't call method \"%s\" without a package or object reference", name);
67955e0c 2094 if (!(stash = gv_stashpvn(packname, packlen, FALSE))) {
2095 if (gv_stashpvn("UNIVERSAL", 9, FALSE))
2096 stash = gv_stashpvn(packname, packlen, TRUE);
a0d0e21e 2097 else
2098 DIE("Can't call method \"%s\" in empty package \"%s\"",
2099 name, packname);
2100 }
2101 gv = gv_fetchmethod(stash,name);
2102 if (!gv)
2103 DIE("Can't locate object method \"%s\" via package \"%s\"",
2104 name, packname);
8ebc5c01 2105 SETs(isGV(gv) ? (SV*)GvCV(gv) : (SV*)gv);
a0d0e21e 2106 RETURN;
2107 }
67955e0c 2108 *(stack_base + TOPMARK + 1) = sv_2mortal(newRV((SV*)iogv));
a0d0e21e 2109 }
2110
2111 if (!ob || !SvOBJECT(ob)) {
2112 char *name = SvPV(nm, na);
2113 DIE("Can't call method \"%s\" on unblessed reference", name);
2114 }
2115
2116 if (!gv) { /* nothing cached */
2117 char *name = SvPV(nm, na);
2118 gv = gv_fetchmethod(SvSTASH(ob),name);
2119 if (!gv)
2120 DIE("Can't locate object method \"%s\" via package \"%s\"",
2121 name, HvNAME(SvSTASH(ob)));
2122 }
2123
8ebc5c01 2124 SETs(isGV(gv) ? (SV*)GvCV(gv) : (SV*)gv);
a0d0e21e 2125 RETURN;
2126}
2127
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