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Tokeniser debugging
[perl5.git] / pp_hot.c
CommitLineData
a0d0e21e
LW		 1/* pp_hot.c
2 *
3818b22b 3 * Copyright (c) 1991-2000, Larry Wall
a0d0e21e
LW		 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"
864dbfa3 19#define PERL_IN_PP_HOT_C
a0d0e21e
LW		 20#include "perl.h"
21
22/* Hot code. */
23
11343788 24#ifdef USE_THREADS
51371543 25static void unset_cvowner(pTHXo_ void *cvarg);
11343788
MB		 26#endif /* USE_THREADS */
27
a0d0e21e
LW		 28PP(pp_const)
29{
4e35701f 30 djSP;
1d7c1841 31 XPUSHs(cSVOP_sv);
a0d0e21e
LW		 32 RETURN;
33}
34
35PP(pp_nextstate)
36{
533c011a 37 PL_curcop = (COP*)PL_op;
a0d0e21e 38 TAINT_NOT; /* Each statement is presumed innocent */
3280af22 39 PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
a0d0e21e
LW		 40 FREETMPS;
41 return NORMAL;
42}
43
44PP(pp_gvsv)
45{
4e35701f 46 djSP;
924508f0 47 EXTEND(SP,1);
533c011a 48 if (PL_op->op_private & OPpLVAL_INTRO)
1d7c1841 49 PUSHs(save_scalar(cGVOP_gv));
a0d0e21e 50 else
1d7c1841 51 PUSHs(GvSV(cGVOP_gv));
a0d0e21e
LW		 52 RETURN;
53}
54
55PP(pp_null)
56{
57 return NORMAL;
58}
59
7399586d
HS		 60PP(pp_setstate)
61{
62 PL_curcop = (COP*)PL_op;
63 return NORMAL;
64}
65
a0d0e21e
LW		 66PP(pp_pushmark)
67{
3280af22 68 PUSHMARK(PL_stack_sp);
a0d0e21e
LW		 69 return NORMAL;
70}
71
72PP(pp_stringify)
73{
4e35701f 74 djSP; dTARGET;
a0d0e21e
LW		 75 STRLEN len;
76 char *s;
77 s = SvPV(TOPs,len);
78 sv_setpvn(TARG,s,len);
234a4bc6
GS		 79 if (SvUTF8(TOPs) && !IN_BYTE)
80 SvUTF8_on(TARG);
a0d0e21e
LW		 81 SETTARG;
82 RETURN;
83}
84
85PP(pp_gv)
86{
4e35701f 87 djSP;
1d7c1841 88 XPUSHs((SV*)cGVOP_gv);
a0d0e21e
LW		 89 RETURN;
90}
91
92PP(pp_and)
93{
4e35701f 94 djSP;
a0d0e21e
LW		 95 if (!SvTRUE(TOPs))
96 RETURN;
97 else {
98 --SP;
99 RETURNOP(cLOGOP->op_other);
100 }
101}
102
103PP(pp_sassign)
104{
4e35701f 105 djSP; dPOPTOPssrl;
748a9306 106
533c011a 107 if (PL_op->op_private & OPpASSIGN_BACKWARDS) {
a0d0e21e
LW		 108 SV *temp;
109 temp = left; left = right; right = temp;
110 }
3280af22 111 if (PL_tainting && PL_tainted && !SvTAINTED(left))
a0d0e21e 112 TAINT_NOT;
54310121 113 SvSetMagicSV(right, left);
a0d0e21e
LW		 114 SETs(right);
115 RETURN;
116}
117
118PP(pp_cond_expr)
119{
4e35701f 120 djSP;
a0d0e21e 121 if (SvTRUEx(POPs))
1a67a97c 122 RETURNOP(cLOGOP->op_other);
a0d0e21e 123 else
1a67a97c 124 RETURNOP(cLOGOP->op_next);
a0d0e21e
LW		 125}
126
127PP(pp_unstack)
128{
129 I32 oldsave;
130 TAINT_NOT; /* Each statement is presumed innocent */
3280af22 131 PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
a0d0e21e 132 FREETMPS;
3280af22 133 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e
LW		 134 LEAVE_SCOPE(oldsave);
135 return NORMAL;
136}
137
a0d0e21e
LW		 138PP(pp_concat)
139{
4e35701f 140 djSP; dATARGET; tryAMAGICbin(concat,opASSIGN);
748a9306
LW		 141 {
142 dPOPTOPssrl;
a0d0e21e 143 STRLEN len;
37931a30 144 U8 *s;
82f2f503
SC		 145 bool left_utf;
146 bool right_utf;
69b47968 147
82f2f503
SC		 148 if (TARG == right && SvGMAGICAL(right))
149 mg_get(right);
150 if (SvGMAGICAL(left))
151 mg_get(left);
152
153 left_utf = DO_UTF8(left);
154 right_utf = DO_UTF8(right);
155
37931a30
JH		 156 if (left_utf != right_utf) {
157 if (TARG == right && !right_utf) {
158 sv_utf8_upgrade(TARG); /* Now straight binary copy */
159 SvUTF8_on(TARG);
160 }
161 else {
162 /* Set TARG to PV(left), then add right */
163 U8 *l, *c, *olds = NULL;
164 STRLEN targlen;
15bb2692 165 s = (U8*)SvPV(right,len);
b7018214 166 right_utf |= DO_UTF8(right);
37931a30 167 if (TARG == right) {
15bb2692 168 /* Take a copy since we're about to overwrite TARG */
b7018214 169 olds = s = (U8*)savepvn((char*)s, len);
37931a30 170 }
689440ec 171 if (!SvOK(left) && SvTYPE(left) <= SVt_PVMG) {
905d5022
JH		 172 if (SvREADONLY(left))
173 left = sv_2mortal(newSVsv(left));
689440ec
JH		 174 else
175 sv_setpv(left, ""); /* Suppress warning. */
176 }
37931a30 177 l = (U8*)SvPV(left, targlen);
b7018214 178 left_utf |= DO_UTF8(left);
37931a30
JH		 179 if (TARG != left)
180 sv_setpvn(TARG, (char*)l, targlen);
181 if (!left_utf)
182 sv_utf8_upgrade(TARG);
183 /* Extend TARG to length of right (s) */
184 targlen = SvCUR(TARG) + len;
185 if (!right_utf) {
186 /* plus one for each hi-byte char if we have to upgrade */
15bb2692 187 for (c = s; c < s + len; c++) {
37931a30
JH		 188 if (*c & 0x80)
189 targlen++;
190 }
191 }
192 SvGROW(TARG, targlen+1);
193 /* And now copy, maybe upgrading right to UTF8 on the fly */
15bb2692 194 for (c = (U8*)SvEND(TARG); len--; s++) {
37931a30
JH		 195 if (*s & 0x80 && !right_utf)
196 c = uv_to_utf8(c, *s);
197 else
198 *c++ = *s;
199 }
200 SvCUR_set(TARG, targlen);
201 *SvEND(TARG) = '\0';
202 SvUTF8_on(TARG);
203 SETs(TARG);
204 Safefree(olds);
205 RETURN;
206 }
207 }
208
a0d0e21e 209 if (TARG != left) {
37931a30 210 s = (U8*)SvPV(left,len);
69b47968 211 if (TARG == right) {
37931a30 212 sv_insert(TARG, 0, 0, (char*)s, len);
69b47968
GS		 213 SETs(TARG);
214 RETURN;
215 }
37931a30 216 sv_setpvn(TARG, (char *)s, len);
a0d0e21e 217 }
37931a30 218 else if (!SvOK(TARG) && SvTYPE(TARG) <= SVt_PVMG)
748a9306 219 sv_setpv(TARG, ""); /* Suppress warning. */
37931a30 220 s = (U8*)SvPV(right,len);
5bc28da9
NIS		 221 if (SvOK(TARG)) {
222#if defined(PERL_Y2KWARN)
e476b1b5 223 if ((SvIOK(right) || SvNOK(right)) && ckWARN(WARN_Y2K)) {
5bc28da9
NIS		 224 STRLEN n;
225 char *s = SvPV(TARG,n);
226 if (n >= 2 && s[n-2] == '1' && s[n-1] == '9'
227 && (n == 2 || !isDIGIT(s[n-3])))
228 {
e476b1b5 229 Perl_warner(aTHX_ WARN_Y2K, "Possible Y2K bug: %s",
5bc28da9
NIS		 230 "about to append an integer to '19'");
231 }
232 }
233#endif
37931a30 234 sv_catpvn(TARG, (char *)s, len);
5bc28da9 235 }
68dc0745 236 else
37931a30
JH		 237 sv_setpvn(TARG, (char *)s, len); /* suppress warning */
238 if (left_utf)
e84ff256 239 SvUTF8_on(TARG);
a0d0e21e
LW		 240 SETTARG;
241 RETURN;
748a9306 242 }
a0d0e21e
LW		 243}
244
245PP(pp_padsv)
246{
4e35701f 247 djSP; dTARGET;
a0d0e21e 248 XPUSHs(TARG);
533c011a
NIS		 249 if (PL_op->op_flags & OPf_MOD) {
250 if (PL_op->op_private & OPpLVAL_INTRO)
251 SAVECLEARSV(PL_curpad[PL_op->op_targ]);
252 else if (PL_op->op_private & OPpDEREF) {
8ec5e241 253 PUTBACK;
533c011a 254 vivify_ref(PL_curpad[PL_op->op_targ], PL_op->op_private & OPpDEREF);
8ec5e241
NIS		 255 SPAGAIN;
256 }
4633a7c4 257 }
a0d0e21e
LW		 258 RETURN;
259}
260
261PP(pp_readline)
262{
f5284f61 263 tryAMAGICunTARGET(iter, 0);
3280af22 264 PL_last_in_gv = (GV*)(*PL_stack_sp--);
8efb3254 265 if (SvTYPE(PL_last_in_gv) != SVt_PVGV) {
1c846c1f 266 if (SvROK(PL_last_in_gv) && SvTYPE(SvRV(PL_last_in_gv)) == SVt_PVGV)
f5284f61 267 PL_last_in_gv = (GV*)SvRV(PL_last_in_gv);
8efb3254 268 else {
f5284f61
IZ		 269 dSP;
270 XPUSHs((SV*)PL_last_in_gv);
271 PUTBACK;
cea2e8a9 272 pp_rv2gv();
f5284f61 273 PL_last_in_gv = (GV*)(*PL_stack_sp--);
f5284f61
IZ		 274 }
275 }
a0d0e21e
LW		 276 return do_readline();
277}
278
279PP(pp_eq)
280{
1c846c1f 281 djSP; tryAMAGICbinSET(eq,0);
a0d0e21e
LW		 282 {
283 dPOPnv;
54310121 284 SETs(boolSV(TOPn == value));
a0d0e21e
LW		 285 RETURN;
286 }
287}
288
289PP(pp_preinc)
290{
4e35701f 291 djSP;
68dc0745 292 if (SvREADONLY(TOPs) || SvTYPE(TOPs) > SVt_PVLV)
d470f89e 293 DIE(aTHX_ PL_no_modify);
25da4f38 294 if (SvIOK_notUV(TOPs) && !SvNOK(TOPs) && !SvPOK(TOPs) &&
55497cff 295 SvIVX(TOPs) != IV_MAX)
296 {
748a9306 297 ++SvIVX(TOPs);
55497cff 298 SvFLAGS(TOPs) &= ~(SVp_NOK|SVp_POK);
748a9306
LW		 299 }
300 else
301 sv_inc(TOPs);
a0d0e21e
LW		 302 SvSETMAGIC(TOPs);
303 return NORMAL;
304}
305
306PP(pp_or)
307{
4e35701f 308 djSP;
a0d0e21e
LW		 309 if (SvTRUE(TOPs))
310 RETURN;
311 else {
312 --SP;
313 RETURNOP(cLOGOP->op_other);
314 }
315}
316
317PP(pp_add)
318{
1c846c1f 319 djSP; dATARGET; tryAMAGICbin(add,opASSIGN);
a0d0e21e 320 {
7a4c00b4 321 dPOPTOPnnrl_ul;
a0d0e21e
LW		 322 SETn( left + right );
323 RETURN;
324 }
325}
326
327PP(pp_aelemfast)
328{
4e35701f 329 djSP;
1d7c1841 330 AV *av = GvAV(cGVOP_gv);
533c011a
NIS		 331 U32 lval = PL_op->op_flags & OPf_MOD;
332 SV** svp = av_fetch(av, PL_op->op_private, lval);
3280af22 333 SV *sv = (svp ? *svp : &PL_sv_undef);
6ff81951 334 EXTEND(SP, 1);
be6c24e0
GS		 335 if (!lval && SvGMAGICAL(sv)) /* see note in pp_helem() */
336 sv = sv_mortalcopy(sv);
337 PUSHs(sv);
a0d0e21e
LW		 338 RETURN;
339}
340
341PP(pp_join)
342{
4e35701f 343 djSP; dMARK; dTARGET;
a0d0e21e
LW		 344 MARK++;
345 do_join(TARG, *MARK, MARK, SP);
346 SP = MARK;
347 SETs(TARG);
348 RETURN;
349}
350
351PP(pp_pushre)
352{
4e35701f 353 djSP;
44a8e56a 354#ifdef DEBUGGING
355 /*
356 * We ass_u_me that LvTARGOFF() comes first, and that two STRLENs
357 * will be enough to hold an OP*.
358 */
359 SV* sv = sv_newmortal();
360 sv_upgrade(sv, SVt_PVLV);
361 LvTYPE(sv) = '/';
533c011a 362 Copy(&PL_op, &LvTARGOFF(sv), 1, OP*);
44a8e56a 363 XPUSHs(sv);
364#else
6b88bc9c 365 XPUSHs((SV*)PL_op);
44a8e56a 366#endif
a0d0e21e
LW		 367 RETURN;
368}
369
370/* Oversized hot code. */
371
372PP(pp_print)
373{
4e35701f 374 djSP; dMARK; dORIGMARK;
a0d0e21e
LW		 375 GV *gv;
376 IO *io;
760ac839 377 register PerlIO *fp;
236988e4 378 MAGIC *mg;
2d8e6c8d 379 STRLEN n_a;
a0d0e21e 380
533c011a 381 if (PL_op->op_flags & OPf_STACKED)
a0d0e21e
LW		 382 gv = (GV*)*++MARK;
383 else
3280af22 384 gv = PL_defoutgv;
155aba94 385 if ((mg = SvTIED_mg((SV*)gv, 'q'))) {
01bb7c6d 386 had_magic:
68dc0745 387 if (MARK == ORIGMARK) {
1c846c1f 388 /* If using default handle then we need to make space to
a60c0954
NIS		 389 * pass object as 1st arg, so move other args up ...
390 */
4352c267 391 MEXTEND(SP, 1);
68dc0745 392 ++MARK;
393 Move(MARK, MARK + 1, (SP - MARK) + 1, SV*);
394 ++SP;
395 }
396 PUSHMARK(MARK - 1);
33c27489 397 *MARK = SvTIED_obj((SV*)gv, mg);
68dc0745 398 PUTBACK;
236988e4 399 ENTER;
864dbfa3 400 call_method("PRINT", G_SCALAR);
236988e4 401 LEAVE;
402 SPAGAIN;
68dc0745 403 MARK = ORIGMARK + 1;
404 *MARK = *SP;
405 SP = MARK;
236988e4 406 RETURN;
407 }
a0d0e21e 408 if (!(io = GvIO(gv))) {
2dd78f96 409 dTHR;
01bb7c6d
DC		 410 if ((GvEGV(gv)) && (mg = SvTIED_mg((SV*)GvEGV(gv),'q')))
411 goto had_magic;
2dd78f96
JH		 412 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
413 report_evil_fh(gv, io, PL_op->op_type);
748a9306 414 SETERRNO(EBADF,RMS$_IFI);
a0d0e21e
LW		 415 goto just_say_no;
416 }
417 else if (!(fp = IoOFP(io))) {
599cee73 418 if (ckWARN2(WARN_CLOSED, WARN_IO)) {
69282e91 419 if (IoIFP(io)) {
2dd78f96
JH		 420 /* integrate with report_evil_fh()? */
421 char *name = NULL;
422 if (isGV(gv)) {
423 SV* sv = sv_newmortal();
424 gv_efullname4(sv, gv, Nullch, FALSE);
425 name = SvPV_nolen(sv);
426 }
427 if (name && *name)
428 Perl_warner(aTHX_ WARN_IO,
429 "Filehandle %s opened only for input", name);
430 else
431 Perl_warner(aTHX_ WARN_IO,
432 "Filehandle opened only for input");
69282e91 433 }
2dd78f96 434 else if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
bc37a18f 435 report_evil_fh(gv, io, PL_op->op_type);
a0d0e21e 436 }
748a9306 437 SETERRNO(EBADF,IoIFP(io)?RMS$_FAC:RMS$_IFI);
a0d0e21e
LW		 438 goto just_say_no;
439 }
440 else {
441 MARK++;
3280af22 442 if (PL_ofslen) {
a0d0e21e
LW		 443 while (MARK <= SP) {
444 if (!do_print(*MARK, fp))
445 break;
446 MARK++;
447 if (MARK <= SP) {
3280af22 448 if (PerlIO_write(fp, PL_ofs, PL_ofslen) == 0 || PerlIO_error(fp)) {
a0d0e21e
LW		 449 MARK--;
450 break;
451 }
452 }
453 }
454 }
455 else {
456 while (MARK <= SP) {
457 if (!do_print(*MARK, fp))
458 break;
459 MARK++;
460 }
461 }
462 if (MARK <= SP)
463 goto just_say_no;
464 else {
3280af22
NIS		 465 if (PL_orslen)
466 if (PerlIO_write(fp, PL_ors, PL_orslen) == 0 || PerlIO_error(fp))
a0d0e21e
LW		 467 goto just_say_no;
468
469 if (IoFLAGS(io) & IOf_FLUSH)
760ac839 470 if (PerlIO_flush(fp) == EOF)
a0d0e21e
LW		 471 goto just_say_no;
472 }
473 }
474 SP = ORIGMARK;
3280af22 475 PUSHs(&PL_sv_yes);
a0d0e21e
LW		 476 RETURN;
477
478 just_say_no:
479 SP = ORIGMARK;
3280af22 480 PUSHs(&PL_sv_undef);
a0d0e21e
LW		 481 RETURN;
482}
483
484PP(pp_rv2av)
485{
f5284f61 486 djSP; dTOPss;
a0d0e21e
LW		 487 AV *av;
488
489 if (SvROK(sv)) {
490 wasref:
f5284f61
IZ		 491 tryAMAGICunDEREF(to_av);
492
a0d0e21e
LW		 493 av = (AV*)SvRV(sv);
494 if (SvTYPE(av) != SVt_PVAV)
cea2e8a9 495 DIE(aTHX_ "Not an ARRAY reference");
533c011a 496 if (PL_op->op_flags & OPf_REF) {
f5284f61 497 SETs((SV*)av);
a0d0e21e
LW		 498 RETURN;
499 }
500 }
501 else {
502 if (SvTYPE(sv) == SVt_PVAV) {
503 av = (AV*)sv;
533c011a 504 if (PL_op->op_flags & OPf_REF) {
f5284f61 505 SETs((SV*)av);
a0d0e21e
LW		 506 RETURN;
507 }
508 }
509 else {
67955e0c 510 GV *gv;
1c846c1f 511
a0d0e21e 512 if (SvTYPE(sv) != SVt_PVGV) {
748a9306 513 char *sym;
c9d5ac95 514 STRLEN len;
748a9306 515
a0d0e21e
LW		 516 if (SvGMAGICAL(sv)) {
517 mg_get(sv);
518 if (SvROK(sv))
519 goto wasref;
520 }
521 if (!SvOK(sv)) {
533c011a
NIS		 522 if (PL_op->op_flags & OPf_REF ||
523 PL_op->op_private & HINT_STRICT_REFS)
cea2e8a9 524 DIE(aTHX_ PL_no_usym, "an ARRAY");
599cee73 525 if (ckWARN(WARN_UNINITIALIZED))
1d7c1841 526 report_uninit();
f5284f61 527 if (GIMME == G_ARRAY) {
c2444246 528 (void)POPs;
4633a7c4 529 RETURN;
f5284f61
IZ		 530 }
531 RETSETUNDEF;
a0d0e21e 532 }
c9d5ac95 533 sym = SvPV(sv,len);
35cd451c
GS		 534 if ((PL_op->op_flags & OPf_SPECIAL) &&
535 !(PL_op->op_flags & OPf_MOD))
536 {
537 gv = (GV*)gv_fetchpv(sym, FALSE, SVt_PVAV);
c9d5ac95
GS		 538 if (!gv
539 && (!is_gv_magical(sym,len,0)
540 || !(gv = (GV*)gv_fetchpv(sym, TRUE, SVt_PVAV))))
541 {
35cd451c 542 RETSETUNDEF;
c9d5ac95 543 }
35cd451c
GS		 544 }
545 else {
546 if (PL_op->op_private & HINT_STRICT_REFS)
cea2e8a9 547 DIE(aTHX_ PL_no_symref, sym, "an ARRAY");
35cd451c
GS		 548 gv = (GV*)gv_fetchpv(sym, TRUE, SVt_PVAV);
549 }
550 }
551 else {
67955e0c 552 gv = (GV*)sv;
a0d0e21e 553 }
67955e0c 554 av = GvAVn(gv);
533c011a 555 if (PL_op->op_private & OPpLVAL_INTRO)
67955e0c 556 av = save_ary(gv);
533c011a 557 if (PL_op->op_flags & OPf_REF) {
f5284f61 558 SETs((SV*)av);
a0d0e21e
LW		 559 RETURN;
560 }
561 }
562 }
563
564 if (GIMME == G_ARRAY) {
565 I32 maxarg = AvFILL(av) + 1;
c2444246 566 (void)POPs; /* XXXX May be optimized away? */
1c846c1f 567 EXTEND(SP, maxarg);
93965878 568 if (SvRMAGICAL(av)) {
1c846c1f 569 U32 i;
93965878
NIS		 570 for (i=0; i < maxarg; i++) {
571 SV **svp = av_fetch(av, i, FALSE);
3280af22 572 SP[i+1] = (svp) ? *svp : &PL_sv_undef;
93965878 573 }
1c846c1f 574 }
93965878
NIS		 575 else {
576 Copy(AvARRAY(av), SP+1, maxarg, SV*);
577 }
a0d0e21e
LW		 578 SP += maxarg;
579 }
580 else {
581 dTARGET;
582 I32 maxarg = AvFILL(av) + 1;
f5284f61 583 SETi(maxarg);
a0d0e21e
LW		 584 }
585 RETURN;
586}
587
588PP(pp_rv2hv)
589{
4e35701f 590 djSP; dTOPss;
a0d0e21e
LW		 591 HV *hv;
592
593 if (SvROK(sv)) {
594 wasref:
f5284f61
IZ		 595 tryAMAGICunDEREF(to_hv);
596
a0d0e21e 597 hv = (HV*)SvRV(sv);
c750a3ec 598 if (SvTYPE(hv) != SVt_PVHV && SvTYPE(hv) != SVt_PVAV)
cea2e8a9 599 DIE(aTHX_ "Not a HASH reference");
533c011a 600 if (PL_op->op_flags & OPf_REF) {
a0d0e21e
LW		 601 SETs((SV*)hv);
602 RETURN;
603 }
604 }
605 else {
c750a3ec 606 if (SvTYPE(sv) == SVt_PVHV || SvTYPE(sv) == SVt_PVAV) {
a0d0e21e 607 hv = (HV*)sv;
533c011a 608 if (PL_op->op_flags & OPf_REF) {
a0d0e21e
LW		 609 SETs((SV*)hv);
610 RETURN;
611 }
612 }
613 else {
67955e0c 614 GV *gv;
1c846c1f 615
a0d0e21e 616 if (SvTYPE(sv) != SVt_PVGV) {
748a9306 617 char *sym;
c9d5ac95 618 STRLEN len;
748a9306 619
a0d0e21e
LW		 620 if (SvGMAGICAL(sv)) {
621 mg_get(sv);
622 if (SvROK(sv))
623 goto wasref;
624 }
625 if (!SvOK(sv)) {
533c011a
NIS		 626 if (PL_op->op_flags & OPf_REF ||
627 PL_op->op_private & HINT_STRICT_REFS)
cea2e8a9 628 DIE(aTHX_ PL_no_usym, "a HASH");
599cee73 629 if (ckWARN(WARN_UNINITIALIZED))
1d7c1841 630 report_uninit();
4633a7c4
LW		 631 if (GIMME == G_ARRAY) {
632 SP--;
633 RETURN;
634 }
a0d0e21e
LW		 635 RETSETUNDEF;
636 }
c9d5ac95 637 sym = SvPV(sv,len);
35cd451c
GS		 638 if ((PL_op->op_flags & OPf_SPECIAL) &&
639 !(PL_op->op_flags & OPf_MOD))
640 {
641 gv = (GV*)gv_fetchpv(sym, FALSE, SVt_PVHV);
c9d5ac95
GS		 642 if (!gv
643 && (!is_gv_magical(sym,len,0)
644 || !(gv = (GV*)gv_fetchpv(sym, TRUE, SVt_PVHV))))
645 {
35cd451c 646 RETSETUNDEF;
c9d5ac95 647 }
35cd451c
GS		 648 }
649 else {
650 if (PL_op->op_private & HINT_STRICT_REFS)
cea2e8a9 651 DIE(aTHX_ PL_no_symref, sym, "a HASH");
35cd451c
GS		 652 gv = (GV*)gv_fetchpv(sym, TRUE, SVt_PVHV);
653 }
654 }
655 else {
67955e0c 656 gv = (GV*)sv;
a0d0e21e 657 }
67955e0c 658 hv = GvHVn(gv);
533c011a 659 if (PL_op->op_private & OPpLVAL_INTRO)
67955e0c 660 hv = save_hash(gv);
533c011a 661 if (PL_op->op_flags & OPf_REF) {
a0d0e21e
LW		 662 SETs((SV*)hv);
663 RETURN;
664 }
665 }
666 }
667
668 if (GIMME == G_ARRAY) { /* array wanted */
3280af22 669 *PL_stack_sp = (SV*)hv;
cea2e8a9 670 return do_kv();
a0d0e21e
LW		 671 }
672 else {
673 dTARGET;
4b154ab5
GA		 674 if (SvTYPE(hv) == SVt_PVAV)
675 hv = avhv_keys((AV*)hv);
b9c39e73 676 if (HvFILL(hv))
57def98f
JH		 677 Perl_sv_setpvf(aTHX_ TARG, "%"IVdf"/%"IVdf,
678 (IV)HvFILL(hv), (IV)HvMAX(hv) + 1);
a0d0e21e
LW		 679 else
680 sv_setiv(TARG, 0);
c750a3ec 681
a0d0e21e
LW		 682 SETTARG;
683 RETURN;
684 }
685}
686
10c8fecd
GS		 687STATIC int
688S_do_maybe_phash(pTHX_ AV *ary, SV **lelem, SV **firstlelem, SV **relem,
689 SV **lastrelem)
690{
691 OP *leftop;
10c8fecd
GS		 692 I32 i;
693
694 leftop = ((BINOP*)PL_op)->op_last;
695 assert(leftop);
696 assert(leftop->op_type == OP_NULL && leftop->op_targ == OP_LIST);
697 leftop = ((LISTOP*)leftop)->op_first;
698 assert(leftop);
699 /* Skip PUSHMARK and each element already assigned to. */
700 for (i = lelem - firstlelem; i > 0; i--) {
701 leftop = leftop->op_sibling;
702 assert(leftop);
703 }
704 if (leftop->op_type != OP_RV2HV)
705 return 0;
706
707 /* pseudohash */
708 if (av_len(ary) > 0)
709 av_fill(ary, 0); /* clear all but the fields hash */
710 if (lastrelem >= relem) {
711 while (relem < lastrelem) { /* gobble up all the rest */
712 SV *tmpstr;
713 assert(relem[0]);
714 assert(relem[1]);
715 /* Avoid a memory leak when avhv_store_ent dies. */
716 tmpstr = sv_newmortal();
717 sv_setsv(tmpstr,relem[1]); /* value */
718 relem[1] = tmpstr;
719 if (avhv_store_ent(ary,relem[0],tmpstr,0))
d16e9ed9 720 (void)SvREFCNT_inc(tmpstr);
10c8fecd
GS		 721 if (SvMAGICAL(ary) != 0 && SvSMAGICAL(tmpstr))
722 mg_set(tmpstr);
723 relem += 2;
724 TAINT_NOT;
725 }
726 }
727 if (relem == lastrelem)
728 return 1;
729 return 2;
730}
731
732STATIC void
733S_do_oddball(pTHX_ HV *hash, SV **relem, SV **firstrelem)
734{
735 if (*relem) {
736 SV *tmpstr;
737 if (ckWARN(WARN_MISC)) {
738 if (relem == firstrelem &&
739 SvROK(*relem) &&
740 (SvTYPE(SvRV(*relem)) == SVt_PVAV ||
741 SvTYPE(SvRV(*relem)) == SVt_PVHV))
742 {
743 Perl_warner(aTHX_ WARN_MISC,
744 "Reference found where even-sized list expected");
745 }
746 else
747 Perl_warner(aTHX_ WARN_MISC,
748 "Odd number of elements in hash assignment");
749 }
750 if (SvTYPE(hash) == SVt_PVAV) {
751 /* pseudohash */
752 tmpstr = sv_newmortal();
753 if (avhv_store_ent((AV*)hash,*relem,tmpstr,0))
d16e9ed9 754 (void)SvREFCNT_inc(tmpstr);
10c8fecd
GS		 755 if (SvMAGICAL(hash) && SvSMAGICAL(tmpstr))
756 mg_set(tmpstr);
757 }
758 else {
759 HE *didstore;
760 tmpstr = NEWSV(29,0);
761 didstore = hv_store_ent(hash,*relem,tmpstr,0);
762 if (SvMAGICAL(hash)) {
763 if (SvSMAGICAL(tmpstr))
764 mg_set(tmpstr);
765 if (!didstore)
766 sv_2mortal(tmpstr);
767 }
768 }
769 TAINT_NOT;
770 }
771}
772
a0d0e21e
LW		 773PP(pp_aassign)
774{
4e35701f 775 djSP;
3280af22
NIS		 776 SV **lastlelem = PL_stack_sp;
777 SV **lastrelem = PL_stack_base + POPMARK;
778 SV **firstrelem = PL_stack_base + POPMARK + 1;
a0d0e21e
LW		 779 SV **firstlelem = lastrelem + 1;
780
781 register SV **relem;
782 register SV **lelem;
783
784 register SV *sv;
785 register AV *ary;
786
54310121 787 I32 gimme;
a0d0e21e
LW		 788 HV *hash;
789 I32 i;
790 int magic;
791
3280af22 792 PL_delaymagic = DM_DELAY; /* catch simultaneous items */
a0d0e21e
LW		 793
794 /* If there's a common identifier on both sides we have to take
795 * special care that assigning the identifier on the left doesn't
796 * clobber a value on the right that's used later in the list.
797 */
10c8fecd 798 if (PL_op->op_private & (OPpASSIGN_COMMON)) {
cc5e57d2 799 EXTEND_MORTAL(lastrelem - firstrelem + 1);
10c8fecd
GS		 800 for (relem = firstrelem; relem <= lastrelem; relem++) {
801 /*SUPPRESS 560*/
155aba94 802 if ((sv = *relem)) {
a1f49e72 803 TAINT_NOT; /* Each item is independent */
10c8fecd 804 *relem = sv_mortalcopy(sv);
a1f49e72 805 }
10c8fecd 806 }
a0d0e21e
LW		 807 }
808
809 relem = firstrelem;
810 lelem = firstlelem;
811 ary = Null(AV*);
812 hash = Null(HV*);
10c8fecd 813
a0d0e21e 814 while (lelem <= lastlelem) {
bbce6d69 815 TAINT_NOT; /* Each item stands on its own, taintwise. */
a0d0e21e
LW		 816 sv = *lelem++;
817 switch (SvTYPE(sv)) {
818 case SVt_PVAV:
819 ary = (AV*)sv;
748a9306 820 magic = SvMAGICAL(ary) != 0;
10c8fecd
GS		 821 if (PL_op->op_private & OPpASSIGN_HASH) {
822 switch (do_maybe_phash(ary, lelem, firstlelem, relem,
823 lastrelem))
824 {
825 case 0:
826 goto normal_array;
827 case 1:
828 do_oddball((HV*)ary, relem, firstrelem);
829 }
830 relem = lastrelem + 1;
831 break;
832 }
833 normal_array:
a0d0e21e 834 av_clear(ary);
7e42bd57 835 av_extend(ary, lastrelem - relem);
a0d0e21e
LW		 836 i = 0;
837 while (relem <= lastrelem) { /* gobble up all the rest */
5117ca91 838 SV **didstore;
a0d0e21e
LW		 839 sv = NEWSV(28,0);
840 assert(*relem);
841 sv_setsv(sv,*relem);
842 *(relem++) = sv;
5117ca91
GS		 843 didstore = av_store(ary,i++,sv);
844 if (magic) {
fb73857a 845 if (SvSMAGICAL(sv))
846 mg_set(sv);
5117ca91 847 if (!didstore)
8127e0e3 848 sv_2mortal(sv);
5117ca91 849 }
bbce6d69 850 TAINT_NOT;
a0d0e21e
LW		 851 }
852 break;
10c8fecd 853 case SVt_PVHV: { /* normal hash */
a0d0e21e
LW		 854 SV *tmpstr;
855
856 hash = (HV*)sv;
748a9306 857 magic = SvMAGICAL(hash) != 0;
a0d0e21e
LW		 858 hv_clear(hash);
859
860 while (relem < lastrelem) { /* gobble up all the rest */
5117ca91 861 HE *didstore;
4633a7c4 862 if (*relem)
a0d0e21e 863 sv = *(relem++);
4633a7c4 864 else
3280af22 865 sv = &PL_sv_no, relem++;
a0d0e21e
LW		 866 tmpstr = NEWSV(29,0);
867 if (*relem)
868 sv_setsv(tmpstr,*relem); /* value */
869 *(relem++) = tmpstr;
5117ca91
GS		 870 didstore = hv_store_ent(hash,sv,tmpstr,0);
871 if (magic) {
fb73857a 872 if (SvSMAGICAL(tmpstr))
873 mg_set(tmpstr);
5117ca91 874 if (!didstore)
8127e0e3 875 sv_2mortal(tmpstr);
5117ca91 876 }
bbce6d69 877 TAINT_NOT;
8e07c86e 878 }
6a0deba8 879 if (relem == lastrelem) {
10c8fecd 880 do_oddball(hash, relem, firstrelem);
6a0deba8 881 relem++;
1930e939 882 }
a0d0e21e
LW		 883 }
884 break;
885 default:
6fc92669
GS		 886 if (SvIMMORTAL(sv)) {
887 if (relem <= lastrelem)
888 relem++;
889 break;
a0d0e21e
LW		 890 }
891 if (relem <= lastrelem) {
892 sv_setsv(sv, *relem);
893 *(relem++) = sv;
894 }
895 else
3280af22 896 sv_setsv(sv, &PL_sv_undef);
a0d0e21e
LW		 897 SvSETMAGIC(sv);
898 break;
899 }
900 }
3280af22
NIS		 901 if (PL_delaymagic & ~DM_DELAY) {
902 if (PL_delaymagic & DM_UID) {
a0d0e21e 903#ifdef HAS_SETRESUID
b28d0864 904 (void)setresuid(PL_uid,PL_euid,(Uid_t)-1);
56febc5e
AD		 905#else
906# ifdef HAS_SETREUID
3280af22 907 (void)setreuid(PL_uid,PL_euid);
56febc5e
AD		 908# else
909# ifdef HAS_SETRUID
b28d0864
NIS		 910 if ((PL_delaymagic & DM_UID) == DM_RUID) {
911 (void)setruid(PL_uid);
912 PL_delaymagic &= ~DM_RUID;
a0d0e21e 913 }
56febc5e
AD		 914# endif /* HAS_SETRUID */
915# ifdef HAS_SETEUID
b28d0864
NIS		 916 if ((PL_delaymagic & DM_UID) == DM_EUID) {
917 (void)seteuid(PL_uid);
918 PL_delaymagic &= ~DM_EUID;
a0d0e21e 919 }
56febc5e 920# endif /* HAS_SETEUID */
b28d0864
NIS		 921 if (PL_delaymagic & DM_UID) {
922 if (PL_uid != PL_euid)
cea2e8a9 923 DIE(aTHX_ "No setreuid available");
b28d0864 924 (void)PerlProc_setuid(PL_uid);
a0d0e21e 925 }
56febc5e
AD		 926# endif /* HAS_SETREUID */
927#endif /* HAS_SETRESUID */
d8eceb89
JH		 928 PL_uid = PerlProc_getuid();
929 PL_euid = PerlProc_geteuid();
a0d0e21e 930 }
3280af22 931 if (PL_delaymagic & DM_GID) {
a0d0e21e 932#ifdef HAS_SETRESGID
b28d0864 933 (void)setresgid(PL_gid,PL_egid,(Gid_t)-1);
56febc5e
AD		 934#else
935# ifdef HAS_SETREGID
3280af22 936 (void)setregid(PL_gid,PL_egid);
56febc5e
AD		 937# else
938# ifdef HAS_SETRGID
b28d0864
NIS		 939 if ((PL_delaymagic & DM_GID) == DM_RGID) {
940 (void)setrgid(PL_gid);
941 PL_delaymagic &= ~DM_RGID;
a0d0e21e 942 }
56febc5e
AD		 943# endif /* HAS_SETRGID */
944# ifdef HAS_SETEGID
b28d0864
NIS		 945 if ((PL_delaymagic & DM_GID) == DM_EGID) {
946 (void)setegid(PL_gid);
947 PL_delaymagic &= ~DM_EGID;
a0d0e21e 948 }
56febc5e 949# endif /* HAS_SETEGID */
b28d0864
NIS		 950 if (PL_delaymagic & DM_GID) {
951 if (PL_gid != PL_egid)
cea2e8a9 952 DIE(aTHX_ "No setregid available");
b28d0864 953 (void)PerlProc_setgid(PL_gid);
a0d0e21e 954 }
56febc5e
AD		 955# endif /* HAS_SETREGID */
956#endif /* HAS_SETRESGID */
d8eceb89
JH		 957 PL_gid = PerlProc_getgid();
958 PL_egid = PerlProc_getegid();
a0d0e21e 959 }
3280af22 960 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
a0d0e21e 961 }
3280af22 962 PL_delaymagic = 0;
54310121 963
964 gimme = GIMME_V;
965 if (gimme == G_VOID)
966 SP = firstrelem - 1;
967 else if (gimme == G_SCALAR) {
968 dTARGET;
969 SP = firstrelem;
970 SETi(lastrelem - firstrelem + 1);
971 }
972 else {
a0d0e21e
LW		 973 if (ary || hash)
974 SP = lastrelem;
975 else
976 SP = firstrelem + (lastlelem - firstlelem);
0c8c7a05 977 lelem = firstlelem + (relem - firstrelem);
5f05dabc 978 while (relem <= SP)
3280af22 979 *relem++ = (lelem <= lastlelem) ? *lelem++ : &PL_sv_undef;
a0d0e21e 980 }
54310121 981 RETURN;
a0d0e21e
LW		 982}
983
8782bef2
GB		 984PP(pp_qr)
985{
986 djSP;
987 register PMOP *pm = cPMOP;
988 SV *rv = sv_newmortal();
57668c4d 989 SV *sv = newSVrv(rv, "Regexp");
8782bef2
GB		 990 sv_magic(sv,(SV*)ReREFCNT_inc(pm->op_pmregexp),'r',0,0);
991 RETURNX(PUSHs(rv));
992}
993
a0d0e21e
LW		 994PP(pp_match)
995{
4e35701f 996 djSP; dTARG;
a0d0e21e
LW		 997 register PMOP *pm = cPMOP;
998 register char *t;
999 register char *s;
1000 char *strend;
1001 I32 global;
f722798b
IZ		 1002 I32 r_flags = REXEC_CHECKED;
1003 char *truebase; /* Start of string */
d9f97599 1004 register REGEXP *rx = pm->op_pmregexp;
b3eb6a9b 1005 bool rxtainted;
a0d0e21e
LW		 1006 I32 gimme = GIMME;
1007 STRLEN len;
748a9306 1008 I32 minmatch = 0;
3280af22 1009 I32 oldsave = PL_savestack_ix;
f86702cc 1010 I32 update_minmatch = 1;
e60df1fa 1011 I32 had_zerolen = 0;
a0d0e21e 1012
533c011a 1013 if (PL_op->op_flags & OPf_STACKED)
a0d0e21e
LW		 1014 TARG = POPs;
1015 else {
54b9620d 1016 TARG = DEFSV;
a0d0e21e
LW		 1017 EXTEND(SP,1);
1018 }
c277df42 1019 PUTBACK; /* EVAL blocks need stack_sp. */
a0d0e21e
LW		 1020 s = SvPV(TARG, len);
1021 strend = s + len;
1022 if (!s)
cea2e8a9 1023 DIE(aTHX_ "panic: do_match");
b3eb6a9b 1024 rxtainted = ((pm->op_pmdynflags & PMdf_TAINTED) ||
3280af22 1025 (PL_tainted && (pm->op_pmflags & PMf_RETAINT)));
9212bbba 1026 TAINT_NOT;
a0d0e21e 1027
48c036b1 1028 if (pm->op_pmdynflags & PMdf_USED) {
c277df42 1029 failure:
a0d0e21e
LW		 1030 if (gimme == G_ARRAY)
1031 RETURN;
1032 RETPUSHNO;
1033 }
1034
3280af22
NIS		 1035 if (!rx->prelen && PL_curpm) {
1036 pm = PL_curpm;
d9f97599 1037 rx = pm->op_pmregexp;
a0d0e21e 1038 }
d9f97599 1039 if (rx->minlen > len) goto failure;
c277df42 1040
a0d0e21e 1041 truebase = t = s;
ad94a511
IZ		 1042
1043 /* XXXX What part of this is needed with true \G-support? */
155aba94 1044 if ((global = pm->op_pmflags & PMf_GLOBAL)) {
cf93c79d 1045 rx->startp[0] = -1;
a0d0e21e
LW		 1046 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
1047 MAGIC* mg = mg_find(TARG, 'g');
565764a8 1048 if (mg && mg->mg_len >= 0) {
b7a35066 1049 if (!(rx->reganch & ROPT_GPOS_SEEN))
1c846c1f 1050 rx->endp[0] = rx->startp[0] = mg->mg_len;
0ef3e39e
HS		 1051 else if (rx->reganch & ROPT_ANCH_GPOS) {
1052 r_flags |= REXEC_IGNOREPOS;
1c846c1f 1053 rx->endp[0] = rx->startp[0] = mg->mg_len;
0ef3e39e 1054 }
748a9306 1055 minmatch = (mg->mg_flags & MGf_MINMATCH);
f86702cc 1056 update_minmatch = 0;
748a9306 1057 }
a0d0e21e
LW		 1058 }
1059 }
0ef3e39e
HS		 1060 if ((gimme != G_ARRAY && !global && rx->nparens)
1061 || SvTEMP(TARG) || PL_sawampersand)
1062 r_flags |= REXEC_COPY_STR;
1c846c1f 1063 if (SvSCREAM(TARG))
22e551b9
IZ		 1064 r_flags |= REXEC_SCREAM;
1065
a0d0e21e 1066 if (pm->op_pmflags & (PMf_MULTILINE|PMf_SINGLELINE)) {
3280af22
NIS		 1067 SAVEINT(PL_multiline);
1068 PL_multiline = pm->op_pmflags & PMf_MULTILINE;
a0d0e21e
LW		 1069 }
1070
1071play_it_again:
cf93c79d
IZ		 1072 if (global && rx->startp[0] != -1) {
1073 t = s = rx->endp[0] + truebase;
d9f97599 1074 if ((s + rx->minlen) > strend)
a0d0e21e 1075 goto nope;
f86702cc 1076 if (update_minmatch++)
e60df1fa 1077 minmatch = had_zerolen;
a0d0e21e 1078 }
f722798b
IZ		 1079 if (rx->reganch & RE_USE_INTUIT) {
1080 s = CALLREG_INTUIT_START(aTHX_ rx, TARG, s, strend, r_flags, NULL);
1081
1082 if (!s)
1083 goto nope;
1084 if ( (rx->reganch & ROPT_CHECK_ALL)
1c846c1f 1085 && !PL_sawampersand
f722798b
IZ		 1086 && ((rx->reganch & ROPT_NOSCAN)
1087 || !((rx->reganch & RE_INTUIT_TAIL)
05b4157f
GS		 1088 && (r_flags & REXEC_SCREAM)))
1089 && !SvROK(TARG)) /* Cannot trust since INTUIT cannot guess ^ */
f722798b 1090 goto yup;
a0d0e21e 1091 }
cea2e8a9 1092 if (CALLREGEXEC(aTHX_ rx, s, strend, truebase, minmatch, TARG, NULL, r_flags))
bbce6d69 1093 {
3280af22 1094 PL_curpm = pm;
a0d0e21e 1095 if (pm->op_pmflags & PMf_ONCE)
48c036b1 1096 pm->op_pmdynflags |= PMdf_USED;
a0d0e21e
LW		 1097 goto gotcha;
1098 }
1099 else
1100 goto ret_no;
1101 /*NOTREACHED*/
1102
1103 gotcha:
72311751
GS		 1104 if (rxtainted)
1105 RX_MATCH_TAINTED_on(rx);
1106 TAINT_IF(RX_MATCH_TAINTED(rx));
a0d0e21e
LW		 1107 if (gimme == G_ARRAY) {
1108 I32 iters, i, len;
1109
d9f97599 1110 iters = rx->nparens;
a0d0e21e
LW		 1111 if (global && !iters)
1112 i = 1;
1113 else
1114 i = 0;
c277df42 1115 SPAGAIN; /* EVAL blocks could move the stack. */
a0d0e21e 1116 EXTEND(SP, iters + i);
bbce6d69 1117 EXTEND_MORTAL(iters + i);
a0d0e21e
LW		 1118 for (i = !i; i <= iters; i++) {
1119 PUSHs(sv_newmortal());
1120 /*SUPPRESS 560*/
cf93c79d
IZ		 1121 if ((rx->startp[i] != -1) && rx->endp[i] != -1 ) {
1122 len = rx->endp[i] - rx->startp[i];
1123 s = rx->startp[i] + truebase;
a0d0e21e 1124 sv_setpvn(*SP, s, len);
a197cbdd
GS		 1125 if ((pm->op_pmdynflags & PMdf_UTF8) && !IN_BYTE) {
1126 SvUTF8_on(*SP);
1127 sv_utf8_downgrade(*SP, TRUE);
1128 }
a0d0e21e
LW		 1129 }
1130 }
1131 if (global) {
cf93c79d
IZ		 1132 had_zerolen = (rx->startp[0] != -1
1133 && rx->startp[0] == rx->endp[0]);
c277df42 1134 PUTBACK; /* EVAL blocks may use stack */
cf93c79d 1135 r_flags |= REXEC_IGNOREPOS | REXEC_NOT_FIRST;
a0d0e21e
LW		 1136 goto play_it_again;
1137 }
f7e33566 1138 else if (!iters)
bde848c5 1139 XPUSHs(&PL_sv_yes);
4633a7c4 1140 LEAVE_SCOPE(oldsave);
a0d0e21e
LW		 1141 RETURN;
1142 }
1143 else {
1144 if (global) {
1145 MAGIC* mg = 0;
1146 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG))
1147 mg = mg_find(TARG, 'g');
1148 if (!mg) {
1149 sv_magic(TARG, (SV*)0, 'g', Nullch, 0);
1150 mg = mg_find(TARG, 'g');
1151 }
cf93c79d
IZ		 1152 if (rx->startp[0] != -1) {
1153 mg->mg_len = rx->endp[0];
d9f97599 1154 if (rx->startp[0] == rx->endp[0])
748a9306
LW		 1155 mg->mg_flags |= MGf_MINMATCH;
1156 else
1157 mg->mg_flags &= ~MGf_MINMATCH;
1158 }
a0d0e21e 1159 }
4633a7c4 1160 LEAVE_SCOPE(oldsave);
a0d0e21e
LW		 1161 RETPUSHYES;
1162 }
1163
f722798b 1164yup: /* Confirmed by INTUIT */
72311751
GS		 1165 if (rxtainted)
1166 RX_MATCH_TAINTED_on(rx);
1167 TAINT_IF(RX_MATCH_TAINTED(rx));
3280af22 1168 PL_curpm = pm;
a0d0e21e 1169 if (pm->op_pmflags & PMf_ONCE)
48c036b1 1170 pm->op_pmdynflags |= PMdf_USED;
cf93c79d
IZ		 1171 if (RX_MATCH_COPIED(rx))
1172 Safefree(rx->subbeg);
1173 RX_MATCH_COPIED_off(rx);
1174 rx->subbeg = Nullch;
a0d0e21e 1175 if (global) {
d9f97599 1176 rx->subbeg = truebase;
cf93c79d 1177 rx->startp[0] = s - truebase;
f722798b 1178 rx->endp[0] = s - truebase + rx->minlen;
cf93c79d 1179 rx->sublen = strend - truebase;
a0d0e21e 1180 goto gotcha;
1c846c1f 1181 }
3280af22 1182 if (PL_sawampersand) {
cf93c79d 1183 I32 off;
a0d0e21e 1184
cf93c79d
IZ		 1185 rx->subbeg = savepvn(t, strend - t);
1186 rx->sublen = strend - t;
1187 RX_MATCH_COPIED_on(rx);
1188 off = rx->startp[0] = s - t;
f722798b 1189 rx->endp[0] = off + rx->minlen;
cf93c79d
IZ		 1190 }
1191 else { /* startp/endp are used by @- @+. */
1192 rx->startp[0] = s - truebase;
f722798b 1193 rx->endp[0] = s - truebase + rx->minlen;
a0d0e21e 1194 }
fc19f8d0 1195 rx->nparens = rx->lastparen = 0; /* used by @- and @+ */
4633a7c4 1196 LEAVE_SCOPE(oldsave);
a0d0e21e
LW		 1197 RETPUSHYES;
1198
1199nope:
a0d0e21e 1200ret_no:
c90c0ff4 1201 if (global && !(pm->op_pmflags & PMf_CONTINUE)) {
a0d0e21e
LW		 1202 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
1203 MAGIC* mg = mg_find(TARG, 'g');
1204 if (mg)
565764a8 1205 mg->mg_len = -1;
a0d0e21e
LW		 1206 }
1207 }
4633a7c4 1208 LEAVE_SCOPE(oldsave);
a0d0e21e
LW		 1209 if (gimme == G_ARRAY)
1210 RETURN;
1211 RETPUSHNO;
1212}
1213
1214OP *
864dbfa3 1215Perl_do_readline(pTHX)
a0d0e21e
LW		 1216{
1217 dSP; dTARGETSTACKED;
1218 register SV *sv;
1219 STRLEN tmplen = 0;
1220 STRLEN offset;
760ac839 1221 PerlIO *fp;
3280af22 1222 register IO *io = GvIO(PL_last_in_gv);
533c011a 1223 register I32 type = PL_op->op_type;
54310121 1224 I32 gimme = GIMME_V;
e79b0511 1225 MAGIC *mg;
a0d0e21e 1226
155aba94 1227 if ((mg = SvTIED_mg((SV*)PL_last_in_gv, 'q'))) {
e79b0511 1228 PUSHMARK(SP);
33c27489 1229 XPUSHs(SvTIED_obj((SV*)PL_last_in_gv, mg));
e79b0511 1230 PUTBACK;
1231 ENTER;
864dbfa3 1232 call_method("READLINE", gimme);
e79b0511 1233 LEAVE;
1234 SPAGAIN;
54310121 1235 if (gimme == G_SCALAR)
1236 SvSetMagicSV_nosteal(TARG, TOPs);
e79b0511 1237 RETURN;
1238 }
a0d0e21e
LW		 1239 fp = Nullfp;
1240 if (io) {
1241 fp = IoIFP(io);
1242 if (!fp) {
1243 if (IoFLAGS(io) & IOf_ARGV) {
1244 if (IoFLAGS(io) & IOf_START) {
a0d0e21e 1245 IoLINES(io) = 0;
3280af22 1246 if (av_len(GvAVn(PL_last_in_gv)) < 0) {
1d7c1841 1247 IoFLAGS(io) &= ~IOf_START;
9d116dd7 1248 do_open(PL_last_in_gv,"-",1,FALSE,O_RDONLY,0,Nullfp);
3280af22
NIS		 1249 sv_setpvn(GvSV(PL_last_in_gv), "-", 1);
1250 SvSETMAGIC(GvSV(PL_last_in_gv));
a2008d6d
GS		 1251 fp = IoIFP(io);
1252 goto have_fp;
a0d0e21e
LW		 1253 }
1254 }
3280af22 1255 fp = nextargv(PL_last_in_gv);
a0d0e21e 1256 if (!fp) { /* Note: fp != IoIFP(io) */
3280af22 1257 (void)do_close(PL_last_in_gv, FALSE); /* now it does*/
a0d0e21e
LW		 1258 }
1259 }
1260 else if (type == OP_GLOB) {
1261 SV *tmpcmd = NEWSV(55, 0);
1262 SV *tmpglob = POPs;
1263 ENTER;
1264 SAVEFREESV(tmpcmd);
1265#ifdef VMS /* expand the wildcards right here, rather than opening a pipe, */
1266 /* since spawning off a process is a real performance hit */
1267 {
1268#include <descrip.h>
1269#include <lib$routines.h>
1270#include <nam.h>
1271#include <rmsdef.h>
1272 char rslt[NAM$C_MAXRSS+1+sizeof(unsigned short int)] = {'\0','\0'};
1273 char vmsspec[NAM$C_MAXRSS+1];
1274 char *rstr = rslt + sizeof(unsigned short int), *begin, *end, *cp;
1275 char tmpfnam[L_tmpnam] = "SYS$SCRATCH:";
1276 $DESCRIPTOR(dfltdsc,"SYS$DISK:[]*.*;");
760ac839 1277 PerlIO *tmpfp;
a0d0e21e
LW		 1278 STRLEN i;
1279 struct dsc$descriptor_s wilddsc
1280 = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
1281 struct dsc$descriptor_vs rsdsc
1282 = {sizeof rslt, DSC$K_DTYPE_VT, DSC$K_CLASS_VS, rslt};
1283 unsigned long int cxt = 0, sts = 0, ok = 1, hasdir = 0, hasver = 0, isunix = 0;
1284
1285 /* We could find out if there's an explicit dev/dir or version
1286 by peeking into lib$find_file's internal context at
1287 ((struct NAM *)((struct FAB *)cxt)->fab$l_nam)->nam$l_fnb
1288 but that's unsupported, so I don't want to do it now and
1289 have it bite someone in the future. */
6ad3d225 1290 strcat(tmpfnam,PerlLIO_tmpnam(NULL));
a0d0e21e
LW		 1291 cp = SvPV(tmpglob,i);
1292 for (; i; i--) {
1293 if (cp[i] == ';') hasver = 1;
1294 if (cp[i] == '.') {
1295 if (sts) hasver = 1;
1296 else sts = 1;
1297 }
1298 if (cp[i] == '/') {
1299 hasdir = isunix = 1;
1300 break;
748a9306 1301 }
a0d0e21e
LW		 1302 if (cp[i] == ']' || cp[i] == '>' || cp[i] == ':') {
1303 hasdir = 1;
1304 break;
1305 }
1306 }
760ac839 1307 if ((tmpfp = PerlIO_open(tmpfnam,"w+","fop=dlt")) != NULL) {
09b7f37c 1308 Stat_t st;
c6ed36e1 1309 if (!PerlLIO_stat(SvPVX(tmpglob),&st) && S_ISDIR(st.st_mode))
09b7f37c
CB		 1310 ok = ((wilddsc.dsc$a_pointer = tovmspath(SvPVX(tmpglob),vmsspec)) != NULL);
1311 else ok = ((wilddsc.dsc$a_pointer = tovmsspec(SvPVX(tmpglob),vmsspec)) != NULL);
a0d0e21e
LW		 1312 if (ok) wilddsc.dsc$w_length = (unsigned short int) strlen(wilddsc.dsc$a_pointer);
1313 while (ok && ((sts = lib$find_file(&wilddsc,&rsdsc,&cxt,
1314 &dfltdsc,NULL,NULL,NULL))&1)) {
1315 end = rstr + (unsigned long int) *rslt;
1316 if (!hasver) while (*end != ';') end--;
1317 *(end++) = '\n'; *end = '\0';
1318 for (cp = rstr; *cp; cp++) *cp = _tolower(*cp);
1319 if (hasdir) {
f86702cc 1320 if (isunix) trim_unixpath(rstr,SvPVX(tmpglob),1);
a0d0e21e
LW		 1321 begin = rstr;
1322 }
1323 else {
1324 begin = end;
1325 while (*(--begin) != ']' && *begin != '>') ;
1326 ++begin;
1327 }
760ac839 1328 ok = (PerlIO_puts(tmpfp,begin) != EOF);
a0d0e21e
LW		 1329 }
1330 if (cxt) (void)lib$find_file_end(&cxt);
748a9306
LW		 1331 if (ok && sts != RMS$_NMF &&
1332 sts != RMS$_DNF && sts != RMS$_FNF) ok = 0;
a0d0e21e 1333 if (!ok) {
c07a80fd 1334 if (!(sts & 1)) {
1335 SETERRNO((sts == RMS$_SYN ? EINVAL : EVMSERR),sts);
1336 }
760ac839 1337 PerlIO_close(tmpfp);
a0d0e21e
LW		 1338 fp = NULL;
1339 }
1340 else {
760ac839 1341 PerlIO_rewind(tmpfp);
9f37169a 1342 IoTYPE(io) = IoTYPE_RDONLY;
a0d0e21e 1343 IoIFP(io) = fp = tmpfp;
1e422769 1344 IoFLAGS(io) &= ~IOf_UNTAINT; /* maybe redundant */
a0d0e21e
LW		 1345 }
1346 }
1347 }
1348#else /* !VMS */
1d7c1841
GS		 1349#ifdef MACOS_TRADITIONAL
1350 sv_setpv(tmpcmd, "glob ");
1351 sv_catsv(tmpcmd, tmpglob);
1352 sv_catpv(tmpcmd, " |");
1353#else
a0d0e21e 1354#ifdef DOSISH
67955e0c 1355#ifdef OS2
1356 sv_setpv(tmpcmd, "for a in ");
1357 sv_catsv(tmpcmd, tmpglob);
1358 sv_catpv(tmpcmd, "; do echo \"$a\\0\\c\"; done |");
1359#else
39e571d4
LM		 1360#ifdef DJGPP
1361 sv_setpv(tmpcmd, "/dev/dosglob/"); /* File System Extension */
1362 sv_catsv(tmpcmd, tmpglob);
1363#else
a0d0e21e
LW		 1364 sv_setpv(tmpcmd, "perlglob ");
1365 sv_catsv(tmpcmd, tmpglob);
1366 sv_catpv(tmpcmd, " |");
39e571d4 1367#endif /* !DJGPP */
67955e0c 1368#endif /* !OS2 */
1369#else /* !DOSISH */
1370#if defined(CSH)
3280af22 1371 sv_setpvn(tmpcmd, PL_cshname, PL_cshlen);
a0d0e21e
LW		 1372 sv_catpv(tmpcmd, " -cf 'set nonomatch; glob ");
1373 sv_catsv(tmpcmd, tmpglob);
16d20bd9 1374 sv_catpv(tmpcmd, "' 2>/dev/null |");
a0d0e21e
LW		 1375#else
1376 sv_setpv(tmpcmd, "echo ");
1377 sv_catsv(tmpcmd, tmpglob);
1378#if 'z' - 'a' == 25
1379 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\012\\012\\012\\012'|");
1380#else
1381 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\n\\n\\n\\n'|");
1382#endif
1383#endif /* !CSH */
67955e0c 1384#endif /* !DOSISH */
1d7c1841 1385#endif /* MACOS_TRADITIONAL */
3280af22 1386 (void)do_open(PL_last_in_gv, SvPVX(tmpcmd), SvCUR(tmpcmd),
9d116dd7 1387 FALSE, O_RDONLY, 0, Nullfp);
a0d0e21e
LW		 1388 fp = IoIFP(io);
1389#endif /* !VMS */
1390 LEAVE;
1391 }
1392 }
1393 else if (type == OP_GLOB)
1394 SP--;
af8c498a 1395 else if (ckWARN(WARN_IO) /* stdout/stderr or other write fh */
9f37169a 1396 && (IoTYPE(io) == IoTYPE_WRONLY || fp == PerlIO_stdout()
af8c498a
GS		 1397 || fp == PerlIO_stderr()))
1398 {
2dd78f96
JH		 1399 /* integrate with report_evil_fh()? */
1400 char *name = NULL;
1401 if (isGV(PL_last_in_gv)) { /* can this ever fail? */
1402 SV* sv = sv_newmortal();
1403 gv_efullname4(sv, PL_last_in_gv, Nullch, FALSE);
1404 name = SvPV_nolen(sv);
1405 }
1406 if (name && *name)
1407 Perl_warner(aTHX_ WARN_IO,
1408 "Filehandle %s opened only for output", name);
1409 else
1410 Perl_warner(aTHX_ WARN_IO,
1411 "Filehandle opened only for output");
af8c498a 1412 }
a0d0e21e
LW		 1413 }
1414 if (!fp) {
790090df
HS		 1415 if (ckWARN2(WARN_GLOB, WARN_CLOSED)
1416 && (!io || !(IoFLAGS(io) & IOf_START))) {
3f4520fe 1417 if (type == OP_GLOB)
e476b1b5 1418 Perl_warner(aTHX_ WARN_GLOB,
af8c498a
GS		 1419 "glob failed (can't start child: %s)",
1420 Strerror(errno));
69282e91 1421 else
bc37a18f 1422 report_evil_fh(PL_last_in_gv, io, PL_op->op_type);
3f4520fe 1423 }
54310121 1424 if (gimme == G_SCALAR) {
a0d0e21e
LW		 1425 (void)SvOK_off(TARG);
1426 PUSHTARG;
1427 }
1428 RETURN;
1429 }
a2008d6d 1430 have_fp:
54310121 1431 if (gimme == G_SCALAR) {
a0d0e21e 1432 sv = TARG;
9607fc9c 1433 if (SvROK(sv))
1434 sv_unref(sv);
a0d0e21e
LW		 1435 (void)SvUPGRADE(sv, SVt_PV);
1436 tmplen = SvLEN(sv); /* remember if already alloced */
1437 if (!tmplen)
1438 Sv_Grow(sv, 80); /* try short-buffering it */
1439 if (type == OP_RCATLINE)
1440 offset = SvCUR(sv);
1441 else
1442 offset = 0;
1443 }
54310121 1444 else {
1445 sv = sv_2mortal(NEWSV(57, 80));
1446 offset = 0;
1447 }
fbad3eb5 1448
3887d568
AP		 1449 /* This should not be marked tainted if the fp is marked clean */
1450#define MAYBE_TAINT_LINE(io, sv) \
1451 if (!(IoFLAGS(io) & IOf_UNTAINT)) { \
1452 TAINT; \
1453 SvTAINTED_on(sv); \
1454 }
1455
684bef36 1456/* delay EOF state for a snarfed empty file */
fbad3eb5 1457#define SNARF_EOF(gimme,rs,io,sv) \
684bef36 1458 (gimme != G_SCALAR || SvCUR(sv) \
b9fee9ba 1459 || (IoFLAGS(io) & IOf_NOLINE) || !RsSNARF(rs))
fbad3eb5 1460
a0d0e21e 1461 for (;;) {
fbad3eb5
GS		 1462 if (!sv_gets(sv, fp, offset)
1463 && (type == OP_GLOB || SNARF_EOF(gimme, PL_rs, io, sv)))
1464 {
760ac839 1465 PerlIO_clearerr(fp);
a0d0e21e 1466 if (IoFLAGS(io) & IOf_ARGV) {
3280af22 1467 fp = nextargv(PL_last_in_gv);
a0d0e21e
LW		 1468 if (fp)
1469 continue;
3280af22 1470 (void)do_close(PL_last_in_gv, FALSE);
a0d0e21e
LW		 1471 }
1472 else if (type == OP_GLOB) {
e476b1b5
GS		 1473 if (!do_close(PL_last_in_gv, FALSE) && ckWARN(WARN_GLOB)) {
1474 Perl_warner(aTHX_ WARN_GLOB,
4eb79ab5 1475 "glob failed (child exited with status %d%s)",
894356b3 1476 (int)(STATUS_CURRENT >> 8),
cf494569 1477 (STATUS_CURRENT & 0x80) ? ", core dumped" : "");
4eb79ab5 1478 }
a0d0e21e 1479 }
54310121 1480 if (gimme == G_SCALAR) {
a0d0e21e
LW		 1481 (void)SvOK_off(TARG);
1482 PUSHTARG;
1483 }
3887d568 1484 MAYBE_TAINT_LINE(io, sv);
a0d0e21e
LW		 1485 RETURN;
1486 }
3887d568 1487 MAYBE_TAINT_LINE(io, sv);
a0d0e21e 1488 IoLINES(io)++;
b9fee9ba 1489 IoFLAGS(io) |= IOf_NOLINE;
71be2cbc 1490 SvSETMAGIC(sv);
a0d0e21e 1491 XPUSHs(sv);
a0d0e21e
LW		 1492 if (type == OP_GLOB) {
1493 char *tmps;
1494
3280af22 1495 if (SvCUR(sv) > 0 && SvCUR(PL_rs) > 0) {
c07a80fd 1496 tmps = SvEND(sv) - 1;
3280af22 1497 if (*tmps == *SvPVX(PL_rs)) {
c07a80fd 1498 *tmps = '\0';
1499 SvCUR(sv)--;
1500 }
1501 }
a0d0e21e
LW		 1502 for (tmps = SvPVX(sv); *tmps; tmps++)
1503 if (!isALPHA(*tmps) && !isDIGIT(*tmps) &&
1504 strchr("$&*(){}[]'\";\\|?<>~`", *tmps))
1505 break;
43384a1a 1506 if (*tmps && PerlLIO_lstat(SvPVX(sv), &PL_statbuf) < 0) {
a0d0e21e
LW		 1507 (void)POPs; /* Unmatched wildcard? Chuck it... */
1508 continue;
1509 }
1510 }
54310121 1511 if (gimme == G_ARRAY) {
a0d0e21e
LW		 1512 if (SvLEN(sv) - SvCUR(sv) > 20) {
1513 SvLEN_set(sv, SvCUR(sv)+1);
1514 Renew(SvPVX(sv), SvLEN(sv), char);
1515 }
1516 sv = sv_2mortal(NEWSV(58, 80));
1517 continue;
1518 }
54310121 1519 else if (gimme == G_SCALAR && !tmplen && SvLEN(sv) - SvCUR(sv) > 80) {
a0d0e21e
LW		 1520 /* try to reclaim a bit of scalar space (only on 1st alloc) */
1521 if (SvCUR(sv) < 60)
1522 SvLEN_set(sv, 80);
1523 else
1524 SvLEN_set(sv, SvCUR(sv)+40); /* allow some slop */
1525 Renew(SvPVX(sv), SvLEN(sv), char);
1526 }
1527 RETURN;
1528 }
1529}
1530
1531PP(pp_enter)
1532{
4e35701f 1533 djSP;
c09156bb 1534 register PERL_CONTEXT *cx;
533c011a 1535 I32 gimme = OP_GIMME(PL_op, -1);
a0d0e21e 1536
54310121 1537 if (gimme == -1) {
1538 if (cxstack_ix >= 0)
1539 gimme = cxstack[cxstack_ix].blk_gimme;
1540 else
1541 gimme = G_SCALAR;
1542 }
a0d0e21e
LW		 1543
1544 ENTER;
1545
1546 SAVETMPS;
924508f0 1547 PUSHBLOCK(cx, CXt_BLOCK, SP);
a0d0e21e
LW		 1548
1549 RETURN;
1550}
1551
1552PP(pp_helem)
1553{
4e35701f 1554 djSP;
760ac839 1555 HE* he;
ae77835f 1556 SV **svp;
a0d0e21e 1557 SV *keysv = POPs;
a0d0e21e 1558 HV *hv = (HV*)POPs;
533c011a
NIS		 1559 U32 lval = PL_op->op_flags & OPf_MOD;
1560 U32 defer = PL_op->op_private & OPpLVAL_DEFER;
be6c24e0 1561 SV *sv;
1c846c1f 1562 U32 hash = (SvFAKE(keysv) && SvREADONLY(keysv)) ? SvUVX(keysv) : 0;
a0d0e21e 1563
ae77835f 1564 if (SvTYPE(hv) == SVt_PVHV) {
1c846c1f 1565 he = hv_fetch_ent(hv, keysv, lval && !defer, hash);
97fcbf96 1566 svp = he ? &HeVAL(he) : 0;
ae77835f
MB		 1567 }
1568 else if (SvTYPE(hv) == SVt_PVAV) {
0ebe0038 1569 if (PL_op->op_private & OPpLVAL_INTRO)
cea2e8a9 1570 DIE(aTHX_ "Can't localize pseudo-hash element");
1c846c1f 1571 svp = avhv_fetch_ent((AV*)hv, keysv, lval && !defer, hash);
ae77835f 1572 }
c750a3ec 1573 else {
a0d0e21e 1574 RETPUSHUNDEF;
c750a3ec 1575 }
a0d0e21e 1576 if (lval) {
3280af22 1577 if (!svp || *svp == &PL_sv_undef) {
68dc0745 1578 SV* lv;
1579 SV* key2;
2d8e6c8d
GS		 1580 if (!defer) {
1581 STRLEN n_a;
cea2e8a9 1582 DIE(aTHX_ PL_no_helem, SvPV(keysv, n_a));
2d8e6c8d 1583 }
68dc0745 1584 lv = sv_newmortal();
1585 sv_upgrade(lv, SVt_PVLV);
1586 LvTYPE(lv) = 'y';
1587 sv_magic(lv, key2 = newSVsv(keysv), 'y', Nullch, 0);
1588 SvREFCNT_dec(key2); /* sv_magic() increments refcount */
1589 LvTARG(lv) = SvREFCNT_inc(hv);
1590 LvTARGLEN(lv) = 1;
1591 PUSHs(lv);
1592 RETURN;
1593 }
533c011a 1594 if (PL_op->op_private & OPpLVAL_INTRO) {
ae77835f 1595 if (HvNAME(hv) && isGV(*svp))
533c011a 1596 save_gp((GV*)*svp, !(PL_op->op_flags & OPf_SPECIAL));
5f05dabc 1597 else
161b7d16 1598 save_helem(hv, keysv, svp);
5f05dabc 1599 }
533c011a
NIS		 1600 else if (PL_op->op_private & OPpDEREF)
1601 vivify_ref(*svp, PL_op->op_private & OPpDEREF);
a0d0e21e 1602 }
3280af22 1603 sv = (svp ? *svp : &PL_sv_undef);
be6c24e0
GS		 1604 /* This makes C<local $tied{foo} = $tied{foo}> possible.
1605 * Pushing the magical RHS on to the stack is useless, since
1606 * that magic is soon destined to be misled by the local(),
1607 * and thus the later pp_sassign() will fail to mg_get() the
1608 * old value. This should also cure problems with delayed
1609 * mg_get()s. GSAR 98-07-03 */
1610 if (!lval && SvGMAGICAL(sv))
1611 sv = sv_mortalcopy(sv);
1612 PUSHs(sv);
a0d0e21e
LW		 1613 RETURN;
1614}
1615
1616PP(pp_leave)
1617{
4e35701f 1618 djSP;
c09156bb 1619 register PERL_CONTEXT *cx;
a0d0e21e
LW		 1620 register SV **mark;
1621 SV **newsp;
1622 PMOP *newpm;
1623 I32 gimme;
1624
533c011a 1625 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e 1626 cx = &cxstack[cxstack_ix];
3280af22 1627 cx->blk_oldpm = PL_curpm; /* fake block should preserve $1 et al */
a0d0e21e
LW		 1628 }
1629
1630 POPBLOCK(cx,newpm);
1631
533c011a 1632 gimme = OP_GIMME(PL_op, -1);
54310121 1633 if (gimme == -1) {
1634 if (cxstack_ix >= 0)
1635 gimme = cxstack[cxstack_ix].blk_gimme;
1636 else
1637 gimme = G_SCALAR;
1638 }
a0d0e21e 1639
a1f49e72 1640 TAINT_NOT;
54310121 1641 if (gimme == G_VOID)
1642 SP = newsp;
1643 else if (gimme == G_SCALAR) {
1644 MARK = newsp + 1;
1645 if (MARK <= SP)
1646 if (SvFLAGS(TOPs) & (SVs_PADTMP|SVs_TEMP))
1647 *MARK = TOPs;
1648 else
1649 *MARK = sv_mortalcopy(TOPs);
a0d0e21e 1650 else {
54310121 1651 MEXTEND(mark,0);
3280af22 1652 *MARK = &PL_sv_undef;
a0d0e21e 1653 }
54310121 1654 SP = MARK;
a0d0e21e 1655 }
54310121 1656 else if (gimme == G_ARRAY) {
a1f49e72
CS		 1657 /* in case LEAVE wipes old return values */
1658 for (mark = newsp + 1; mark <= SP; mark++) {
1659 if (!(SvFLAGS(*mark) & (SVs_PADTMP|SVs_TEMP))) {
a0d0e21e 1660 *mark = sv_mortalcopy(*mark);
a1f49e72
CS		 1661 TAINT_NOT; /* Each item is independent */
1662 }
1663 }
a0d0e21e 1664 }
3280af22 1665 PL_curpm = newpm; /* Don't pop $1 et al till now */
a0d0e21e
LW		 1666
1667 LEAVE;
1668
1669 RETURN;
1670}
1671
1672PP(pp_iter)
1673{
4e35701f 1674 djSP;
c09156bb 1675 register PERL_CONTEXT *cx;
5f05dabc 1676 SV* sv;
4633a7c4 1677 AV* av;
1d7c1841 1678 SV **itersvp;
a0d0e21e 1679
924508f0 1680 EXTEND(SP, 1);
a0d0e21e 1681 cx = &cxstack[cxstack_ix];
6b35e009 1682 if (CxTYPE(cx) != CXt_LOOP)
cea2e8a9 1683 DIE(aTHX_ "panic: pp_iter");
a0d0e21e 1684
1d7c1841 1685 itersvp = CxITERVAR(cx);
4633a7c4 1686 av = cx->blk_loop.iterary;
89ea2908
GA		 1687 if (SvTYPE(av) != SVt_PVAV) {
1688 /* iterate ($min .. $max) */
1689 if (cx->blk_loop.iterlval) {
1690 /* string increment */
1691 register SV* cur = cx->blk_loop.iterlval;
1692 STRLEN maxlen;
1693 char *max = SvPV((SV*)av, maxlen);
1694 if (!SvNIOK(cur) && SvCUR(cur) <= maxlen) {
eaa5c2d6 1695#ifndef USE_THREADS /* don't risk potential race */
1d7c1841 1696 if (SvREFCNT(*itersvp) == 1 && !SvMAGICAL(*itersvp)) {
eaa5c2d6 1697 /* safe to reuse old SV */
1d7c1841 1698 sv_setsv(*itersvp, cur);
eaa5c2d6 1699 }
1c846c1f 1700 else
eaa5c2d6
GA		 1701#endif
1702 {
1703 /* we need a fresh SV every time so that loop body sees a
1704 * completely new SV for closures/references to work as
1705 * they used to */
1d7c1841
GS		 1706 SvREFCNT_dec(*itersvp);
1707 *itersvp = newSVsv(cur);
eaa5c2d6 1708 }
89ea2908
GA		 1709 if (strEQ(SvPVX(cur), max))
1710 sv_setiv(cur, 0); /* terminate next time */
1711 else
1712 sv_inc(cur);
1713 RETPUSHYES;
1714 }
1715 RETPUSHNO;
1716 }
1717 /* integer increment */
1718 if (cx->blk_loop.iterix > cx->blk_loop.itermax)
1719 RETPUSHNO;
7f61b687 1720
eaa5c2d6 1721#ifndef USE_THREADS /* don't risk potential race */
1d7c1841 1722 if (SvREFCNT(*itersvp) == 1 && !SvMAGICAL(*itersvp)) {
eaa5c2d6 1723 /* safe to reuse old SV */
1d7c1841 1724 sv_setiv(*itersvp, cx->blk_loop.iterix++);
eaa5c2d6 1725 }
1c846c1f 1726 else
eaa5c2d6
GA		 1727#endif
1728 {
1729 /* we need a fresh SV every time so that loop body sees a
1730 * completely new SV for closures/references to work as they
1731 * used to */
1d7c1841
GS		 1732 SvREFCNT_dec(*itersvp);
1733 *itersvp = newSViv(cx->blk_loop.iterix++);
eaa5c2d6 1734 }
89ea2908
GA		 1735 RETPUSHYES;
1736 }
1737
1738 /* iterate array */
3280af22 1739 if (cx->blk_loop.iterix >= (av == PL_curstack ? cx->blk_oldsp : AvFILL(av)))
4633a7c4 1740 RETPUSHNO;
a0d0e21e 1741
1d7c1841 1742 SvREFCNT_dec(*itersvp);
a0d0e21e 1743
155aba94 1744 if ((sv = SvMAGICAL(av)
1c846c1f 1745 ? *av_fetch(av, ++cx->blk_loop.iterix, FALSE)
155aba94 1746 : AvARRAY(av)[++cx->blk_loop.iterix]))
a0d0e21e 1747 SvTEMP_off(sv);
a0d0e21e 1748 else
3280af22
NIS		 1749 sv = &PL_sv_undef;
1750 if (av != PL_curstack && SvIMMORTAL(sv)) {
5f05dabc 1751 SV *lv = cx->blk_loop.iterlval;
71be2cbc 1752 if (lv && SvREFCNT(lv) > 1) {
1753 SvREFCNT_dec(lv);
1754 lv = Nullsv;
1755 }
5f05dabc 1756 if (lv)
1757 SvREFCNT_dec(LvTARG(lv));
1758 else {
68dc0745 1759 lv = cx->blk_loop.iterlval = NEWSV(26, 0);
5f05dabc 1760 sv_upgrade(lv, SVt_PVLV);
5f05dabc 1761 LvTYPE(lv) = 'y';
68dc0745 1762 sv_magic(lv, Nullsv, 'y', Nullch, 0);
5f05dabc 1763 }
1764 LvTARG(lv) = SvREFCNT_inc(av);
1765 LvTARGOFF(lv) = cx->blk_loop.iterix;
42718184 1766 LvTARGLEN(lv) = (STRLEN)UV_MAX;
5f05dabc 1767 sv = (SV*)lv;
1768 }
a0d0e21e 1769
1d7c1841 1770 *itersvp = SvREFCNT_inc(sv);
a0d0e21e
LW		 1771 RETPUSHYES;
1772}
1773
1774PP(pp_subst)
1775{
4e35701f 1776 djSP; dTARG;
a0d0e21e
LW		 1777 register PMOP *pm = cPMOP;
1778 PMOP *rpm = pm;
1779 register SV *dstr;
1780 register char *s;
1781 char *strend;
1782 register char *m;
1783 char *c;
1784 register char *d;
1785 STRLEN clen;
1786 I32 iters = 0;
1787 I32 maxiters;
1788 register I32 i;
1789 bool once;
71be2cbc 1790 bool rxtainted;
a0d0e21e 1791 char *orig;
22e551b9 1792 I32 r_flags;
d9f97599 1793 register REGEXP *rx = pm->op_pmregexp;
a0d0e21e
LW		 1794 STRLEN len;
1795 int force_on_match = 0;
3280af22 1796 I32 oldsave = PL_savestack_ix;
a0d0e21e 1797
5cd24f17 1798 /* known replacement string? */
1799 dstr = (pm->op_pmflags & PMf_CONST) ? POPs : Nullsv;
533c011a 1800 if (PL_op->op_flags & OPf_STACKED)
a0d0e21e
LW		 1801 TARG = POPs;
1802 else {
54b9620d 1803 TARG = DEFSV;
a0d0e21e 1804 EXTEND(SP,1);
1c846c1f 1805 }
eca06228
NIS		 1806 if (SvFAKE(TARG) && SvREADONLY(TARG))
1807 sv_force_normal(TARG);
68dc0745 1808 if (SvREADONLY(TARG)
1809 || (SvTYPE(TARG) > SVt_PVLV
1810 && !(SvTYPE(TARG) == SVt_PVGV && SvFAKE(TARG))))
d470f89e 1811 DIE(aTHX_ PL_no_modify);
8ec5e241
NIS		 1812 PUTBACK;
1813
a0d0e21e 1814 s = SvPV(TARG, len);
68dc0745 1815 if (!SvPOKp(TARG) || SvTYPE(TARG) == SVt_PVGV)
a0d0e21e 1816 force_on_match = 1;
b3eb6a9b 1817 rxtainted = ((pm->op_pmdynflags & PMdf_TAINTED) ||
3280af22
NIS		 1818 (PL_tainted && (pm->op_pmflags & PMf_RETAINT)));
1819 if (PL_tainted)
b3eb6a9b 1820 rxtainted |= 2;
9212bbba 1821 TAINT_NOT;
a0d0e21e
LW		 1822
1823 force_it:
1824 if (!pm || !s)
cea2e8a9 1825 DIE(aTHX_ "panic: do_subst");
a0d0e21e
LW		 1826
1827 strend = s + len;
1c846c1f 1828 maxiters = 2*(strend - s) + 10; /* We can match twice at each
2beec16e
IZ		 1829 position, once with zero-length,
1830 second time with non-zero. */
a0d0e21e 1831
3280af22
NIS		 1832 if (!rx->prelen && PL_curpm) {
1833 pm = PL_curpm;
d9f97599 1834 rx = pm->op_pmregexp;
a0d0e21e 1835 }
22e551b9 1836 r_flags = (rx->nparens || SvTEMP(TARG) || PL_sawampersand)
9d080a66 1837 ? REXEC_COPY_STR : 0;
f722798b 1838 if (SvSCREAM(TARG))
22e551b9 1839 r_flags |= REXEC_SCREAM;
a0d0e21e 1840 if (pm->op_pmflags & (PMf_MULTILINE|PMf_SINGLELINE)) {
3280af22
NIS		 1841 SAVEINT(PL_multiline);
1842 PL_multiline = pm->op_pmflags & PMf_MULTILINE;
a0d0e21e
LW		 1843 }
1844 orig = m = s;
f722798b
IZ		 1845 if (rx->reganch & RE_USE_INTUIT) {
1846 s = CALLREG_INTUIT_START(aTHX_ rx, TARG, s, strend, r_flags, NULL);
1847
1848 if (!s)
1849 goto nope;
1850 /* How to do it in subst? */
1851/* if ( (rx->reganch & ROPT_CHECK_ALL)
1c846c1f 1852 && !PL_sawampersand
f722798b
IZ		 1853 && ((rx->reganch & ROPT_NOSCAN)
1854 || !((rx->reganch & RE_INTUIT_TAIL)
1855 && (r_flags & REXEC_SCREAM))))
1856 goto yup;
1857*/
a0d0e21e 1858 }
71be2cbc 1859
1860 /* only replace once? */
a0d0e21e 1861 once = !(rpm->op_pmflags & PMf_GLOBAL);
71be2cbc 1862
1863 /* known replacement string? */
5cd24f17 1864 c = dstr ? SvPV(dstr, clen) : Nullch;
71be2cbc 1865
1866 /* can do inplace substitution? */
22e551b9 1867 if (c && clen <= rx->minlen && (once || !(r_flags & REXEC_COPY_STR))
d9f97599 1868 && !(rx->reganch & ROPT_LOOKBEHIND_SEEN)) {
f722798b
IZ		 1869 if (!CALLREGEXEC(aTHX_ rx, s, strend, orig, 0, TARG, NULL,
1870 r_flags | REXEC_CHECKED))
1871 {
8ec5e241 1872 SPAGAIN;
3280af22 1873 PUSHs(&PL_sv_no);
71be2cbc 1874 LEAVE_SCOPE(oldsave);
1875 RETURN;
1876 }
1877 if (force_on_match) {
1878 force_on_match = 0;
1879 s = SvPV_force(TARG, len);
1880 goto force_it;
1881 }
71be2cbc 1882 d = s;
3280af22 1883 PL_curpm = pm;
71be2cbc 1884 SvSCREAM_off(TARG); /* disable possible screamer */
1885 if (once) {
48c036b1 1886 rxtainted |= RX_MATCH_TAINTED(rx);
cf93c79d
IZ		 1887 m = orig + rx->startp[0];
1888 d = orig + rx->endp[0];
71be2cbc 1889 s = orig;
1890 if (m - s > strend - d) { /* faster to shorten from end */
1891 if (clen) {
1892 Copy(c, m, clen, char);
1893 m += clen;
a0d0e21e 1894 }
71be2cbc 1895 i = strend - d;
1896 if (i > 0) {
1897 Move(d, m, i, char);
1898 m += i;
a0d0e21e 1899 }
71be2cbc 1900 *m = '\0';
1901 SvCUR_set(TARG, m - s);
1902 }
1903 /*SUPPRESS 560*/
155aba94 1904 else if ((i = m - s)) { /* faster from front */
71be2cbc 1905 d -= clen;
1906 m = d;
1907 sv_chop(TARG, d-i);
1908 s += i;
1909 while (i--)
1910 *--d = *--s;
1911 if (clen)
1912 Copy(c, m, clen, char);
1913 }
1914 else if (clen) {
1915 d -= clen;
1916 sv_chop(TARG, d);
1917 Copy(c, d, clen, char);
1918 }
1919 else {
1920 sv_chop(TARG, d);
1921 }
48c036b1 1922 TAINT_IF(rxtainted & 1);
8ec5e241 1923 SPAGAIN;
3280af22 1924 PUSHs(&PL_sv_yes);
71be2cbc 1925 }
1926 else {
71be2cbc 1927 do {
1928 if (iters++ > maxiters)
cea2e8a9 1929 DIE(aTHX_ "Substitution loop");
d9f97599 1930 rxtainted |= RX_MATCH_TAINTED(rx);
cf93c79d 1931 m = rx->startp[0] + orig;
71be2cbc 1932 /*SUPPRESS 560*/
155aba94 1933 if ((i = m - s)) {
71be2cbc 1934 if (s != d)
1935 Move(s, d, i, char);
1936 d += i;
a0d0e21e 1937 }
71be2cbc 1938 if (clen) {
1939 Copy(c, d, clen, char);
1940 d += clen;
1941 }
cf93c79d 1942 s = rx->endp[0] + orig;
cea2e8a9 1943 } while (CALLREGEXEC(aTHX_ rx, s, strend, orig, s == m,
f722798b
IZ		 1944 TARG, NULL,
1945 /* don't match same null twice */
1946 REXEC_NOT_FIRST|REXEC_IGNOREPOS));
71be2cbc 1947 if (s != d) {
1948 i = strend - s;
1949 SvCUR_set(TARG, d - SvPVX(TARG) + i);
1950 Move(s, d, i+1, char); /* include the NUL */
a0d0e21e 1951 }
48c036b1 1952 TAINT_IF(rxtainted & 1);
8ec5e241 1953 SPAGAIN;
71be2cbc 1954 PUSHs(sv_2mortal(newSViv((I32)iters)));
a0d0e21e 1955 }
80b498e0 1956 (void)SvPOK_only_UTF8(TARG);
48c036b1 1957 TAINT_IF(rxtainted);
8ec5e241
NIS		 1958 if (SvSMAGICAL(TARG)) {
1959 PUTBACK;
1960 mg_set(TARG);
1961 SPAGAIN;
1962 }
9212bbba 1963 SvTAINT(TARG);
71be2cbc 1964 LEAVE_SCOPE(oldsave);
1965 RETURN;
a0d0e21e 1966 }
71be2cbc 1967
f722798b
IZ		 1968 if (CALLREGEXEC(aTHX_ rx, s, strend, orig, 0, TARG, NULL,
1969 r_flags | REXEC_CHECKED))
1970 {
a0d0e21e
LW		 1971 if (force_on_match) {
1972 force_on_match = 0;
1973 s = SvPV_force(TARG, len);
1974 goto force_it;
1975 }
48c036b1 1976 rxtainted |= RX_MATCH_TAINTED(rx);
8ec5e241 1977 dstr = NEWSV(25, len);
a0d0e21e 1978 sv_setpvn(dstr, m, s-m);
3280af22 1979 PL_curpm = pm;
a0d0e21e 1980 if (!c) {
c09156bb 1981 register PERL_CONTEXT *cx;
8ec5e241 1982 SPAGAIN;
a0d0e21e
LW		 1983 PUSHSUBST(cx);
1984 RETURNOP(cPMOP->op_pmreplroot);
1985 }
cf93c79d 1986 r_flags |= REXEC_IGNOREPOS | REXEC_NOT_FIRST;
a0d0e21e
LW		 1987 do {
1988 if (iters++ > maxiters)
cea2e8a9 1989 DIE(aTHX_ "Substitution loop");
d9f97599 1990 rxtainted |= RX_MATCH_TAINTED(rx);
cf93c79d 1991 if (RX_MATCH_COPIED(rx) && rx->subbeg != orig) {
a0d0e21e
LW		 1992 m = s;
1993 s = orig;
cf93c79d 1994 orig = rx->subbeg;
a0d0e21e
LW		 1995 s = orig + (m - s);
1996 strend = s + (strend - m);
1997 }
cf93c79d 1998 m = rx->startp[0] + orig;
a0d0e21e 1999 sv_catpvn(dstr, s, m-s);
cf93c79d 2000 s = rx->endp[0] + orig;
a0d0e21e
LW		 2001 if (clen)
2002 sv_catpvn(dstr, c, clen);
2003 if (once)
2004 break;
cea2e8a9 2005 } while (CALLREGEXEC(aTHX_ rx, s, strend, orig, s == m, TARG, NULL, r_flags));
a0d0e21e 2006 sv_catpvn(dstr, s, strend - s);
748a9306 2007
4633a7c4 2008 (void)SvOOK_off(TARG);
cb0b1708 2009 Safefree(SvPVX(TARG));
748a9306
LW		 2010 SvPVX(TARG) = SvPVX(dstr);
2011 SvCUR_set(TARG, SvCUR(dstr));
2012 SvLEN_set(TARG, SvLEN(dstr));
2013 SvPVX(dstr) = 0;
2014 sv_free(dstr);
2015
48c036b1 2016 TAINT_IF(rxtainted & 1);
f878fbec 2017 SPAGAIN;
48c036b1
GS		 2018 PUSHs(sv_2mortal(newSViv((I32)iters)));
2019
a0d0e21e 2020 (void)SvPOK_only(TARG);
48c036b1 2021 TAINT_IF(rxtainted);
a0d0e21e 2022 SvSETMAGIC(TARG);
9212bbba 2023 SvTAINT(TARG);
4633a7c4 2024 LEAVE_SCOPE(oldsave);
a0d0e21e
LW		 2025 RETURN;
2026 }
5cd24f17 2027 goto ret_no;
a0d0e21e
LW		 2028
2029nope:
1c846c1f 2030ret_no:
8ec5e241 2031 SPAGAIN;
3280af22 2032 PUSHs(&PL_sv_no);
4633a7c4 2033 LEAVE_SCOPE(oldsave);
a0d0e21e
LW		 2034 RETURN;
2035}
2036
2037PP(pp_grepwhile)
2038{
4e35701f 2039 djSP;
a0d0e21e
LW		 2040
2041 if (SvTRUEx(POPs))
3280af22
NIS		 2042 PL_stack_base[PL_markstack_ptr[-1]++] = PL_stack_base[*PL_markstack_ptr];
2043 ++*PL_markstack_ptr;
a0d0e21e
LW		 2044 LEAVE; /* exit inner scope */
2045
2046 /* All done yet? */
3280af22 2047 if (PL_stack_base + *PL_markstack_ptr > SP) {
a0d0e21e 2048 I32 items;
54310121 2049 I32 gimme = GIMME_V;
a0d0e21e
LW		 2050
2051 LEAVE; /* exit outer scope */
2052 (void)POPMARK; /* pop src */
3280af22 2053 items = --*PL_markstack_ptr - PL_markstack_ptr[-1];
a0d0e21e 2054 (void)POPMARK; /* pop dst */
3280af22 2055 SP = PL_stack_base + POPMARK; /* pop original mark */
54310121 2056 if (gimme == G_SCALAR) {
a0d0e21e
LW		 2057 dTARGET;
2058 XPUSHi(items);
a0d0e21e 2059 }
54310121 2060 else if (gimme == G_ARRAY)
2061 SP += items;
a0d0e21e
LW		 2062 RETURN;
2063 }
2064 else {
2065 SV *src;
2066
2067 ENTER; /* enter inner scope */
1d7c1841 2068 SAVEVPTR(PL_curpm);
a0d0e21e 2069
3280af22 2070 src = PL_stack_base[*PL_markstack_ptr];
a0d0e21e 2071 SvTEMP_off(src);
54b9620d 2072 DEFSV = src;
a0d0e21e
LW		 2073
2074 RETURNOP(cLOGOP->op_other);
2075 }
2076}
2077
2078PP(pp_leavesub)
2079{
4e35701f 2080 djSP;
a0d0e21e
LW		 2081 SV **mark;
2082 SV **newsp;
2083 PMOP *newpm;
2084 I32 gimme;
c09156bb 2085 register PERL_CONTEXT *cx;
b0d9ce38 2086 SV *sv;
a0d0e21e
LW		 2087
2088 POPBLOCK(cx,newpm);
1c846c1f 2089
a1f49e72 2090 TAINT_NOT;
a0d0e21e
LW		 2091 if (gimme == G_SCALAR) {
2092 MARK = newsp + 1;
a29cdaf0 2093 if (MARK <= SP) {
a8bba7fa 2094 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
a29cdaf0
IZ		 2095 if (SvTEMP(TOPs)) {
2096 *MARK = SvREFCNT_inc(TOPs);
2097 FREETMPS;
2098 sv_2mortal(*MARK);
cd06dffe
GS		 2099 }
2100 else {
959e3673 2101 sv = SvREFCNT_inc(TOPs); /* FREETMPS could clobber it */
a29cdaf0 2102 FREETMPS;
959e3673
GS		 2103 *MARK = sv_mortalcopy(sv);
2104 SvREFCNT_dec(sv);
a29cdaf0 2105 }
cd06dffe
GS		 2106 }
2107 else
a29cdaf0 2108 *MARK = SvTEMP(TOPs) ? TOPs : sv_mortalcopy(TOPs);
cd06dffe
GS		 2109 }
2110 else {
f86702cc 2111 MEXTEND(MARK, 0);
3280af22 2112 *MARK = &PL_sv_undef;
a0d0e21e
LW		 2113 }
2114 SP = MARK;
2115 }
54310121 2116 else if (gimme == G_ARRAY) {
f86702cc 2117 for (MARK = newsp + 1; MARK <= SP; MARK++) {
a1f49e72 2118 if (!SvTEMP(*MARK)) {
f86702cc 2119 *MARK = sv_mortalcopy(*MARK);
a1f49e72
CS		 2120 TAINT_NOT; /* Each item is independent */
2121 }
f86702cc 2122 }
a0d0e21e 2123 }
f86702cc 2124 PUTBACK;
1c846c1f 2125
b0d9ce38 2126 POPSUB(cx,sv); /* Stack values are safe: release CV and @_ ... */
3280af22 2127 PL_curpm = newpm; /* ... and pop $1 et al */
a0d0e21e
LW		 2128
2129 LEAVE;
b0d9ce38 2130 LEAVESUB(sv);
a0d0e21e
LW		 2131 return pop_return();
2132}
2133
cd06dffe
GS		 2134/* This duplicates the above code because the above code must not
2135 * get any slower by more conditions */
2136PP(pp_leavesublv)
2137{
2138 djSP;
2139 SV **mark;
2140 SV **newsp;
2141 PMOP *newpm;
2142 I32 gimme;
2143 register PERL_CONTEXT *cx;
b0d9ce38 2144 SV *sv;
cd06dffe
GS		 2145
2146 POPBLOCK(cx,newpm);
1c846c1f 2147
cd06dffe
GS		 2148 TAINT_NOT;
2149
2150 if (cx->blk_sub.lval & OPpENTERSUB_INARGS) {
2151 /* We are an argument to a function or grep().
2152 * This kind of lvalueness was legal before lvalue
2153 * subroutines too, so be backward compatible:
2154 * cannot report errors. */
2155
2156 /* Scalar context *is* possible, on the LHS of -> only,
2157 * as in f()->meth(). But this is not an lvalue. */
2158 if (gimme == G_SCALAR)
2159 goto temporise;
2160 if (gimme == G_ARRAY) {
a8bba7fa 2161 if (!CvLVALUE(cx->blk_sub.cv))
cd06dffe
GS		 2162 goto temporise_array;
2163 EXTEND_MORTAL(SP - newsp);
2164 for (mark = newsp + 1; mark <= SP; mark++) {
2165 if (SvTEMP(*mark))
2166 /* empty */ ;
2167 else if (SvFLAGS(*mark) & (SVs_PADTMP | SVf_READONLY))
2168 *mark = sv_mortalcopy(*mark);
2169 else {
2170 /* Can be a localized value subject to deletion. */
2171 PL_tmps_stack[++PL_tmps_ix] = *mark;
e1f15930 2172 (void)SvREFCNT_inc(*mark);
cd06dffe
GS		 2173 }
2174 }
2175 }
2176 }
2177 else if (cx->blk_sub.lval) { /* Leave it as it is if we can. */
2178 /* Here we go for robustness, not for speed, so we change all
2179 * the refcounts so the caller gets a live guy. Cannot set
2180 * TEMP, so sv_2mortal is out of question. */
a8bba7fa 2181 if (!CvLVALUE(cx->blk_sub.cv)) {
b0d9ce38 2182 POPSUB(cx,sv);
d470f89e 2183 PL_curpm = newpm;
b0d9ce38
GS		 2184 LEAVE;
2185 LEAVESUB(sv);
d470f89e
GS		 2186 DIE(aTHX_ "Can't modify non-lvalue subroutine call");
2187 }
cd06dffe
GS		 2188 if (gimme == G_SCALAR) {
2189 MARK = newsp + 1;
2190 EXTEND_MORTAL(1);
2191 if (MARK == SP) {
d470f89e 2192 if (SvFLAGS(TOPs) & (SVs_TEMP | SVs_PADTMP | SVf_READONLY)) {
b0d9ce38 2193 POPSUB(cx,sv);
d470f89e 2194 PL_curpm = newpm;
b0d9ce38
GS		 2195 LEAVE;
2196 LEAVESUB(sv);
d470f89e 2197 DIE(aTHX_ "Can't return a %s from lvalue subroutine",
cd06dffe 2198 SvREADONLY(TOPs) ? "readonly value" : "temporary");
d470f89e 2199 }
cd06dffe
GS		 2200 else { /* Can be a localized value
2201 * subject to deletion. */
2202 PL_tmps_stack[++PL_tmps_ix] = *mark;
e1f15930 2203 (void)SvREFCNT_inc(*mark);
cd06dffe
GS		 2204 }
2205 }
d470f89e 2206 else { /* Should not happen? */
b0d9ce38 2207 POPSUB(cx,sv);
d470f89e 2208 PL_curpm = newpm;
b0d9ce38
GS		 2209 LEAVE;
2210 LEAVESUB(sv);
d470f89e 2211 DIE(aTHX_ "%s returned from lvalue subroutine in scalar context",
cd06dffe 2212 (MARK > SP ? "Empty array" : "Array"));
d470f89e 2213 }
cd06dffe
GS		 2214 SP = MARK;
2215 }
2216 else if (gimme == G_ARRAY) {
2217 EXTEND_MORTAL(SP - newsp);
2218 for (mark = newsp + 1; mark <= SP; mark++) {
d470f89e
GS		 2219 if (SvFLAGS(*mark) & (SVs_TEMP | SVs_PADTMP | SVf_READONLY)) {
2220 /* Might be flattened array after $#array = */
2221 PUTBACK;
b0d9ce38 2222 POPSUB(cx,sv);
d470f89e 2223 PL_curpm = newpm;
b0d9ce38
GS		 2224 LEAVE;
2225 LEAVESUB(sv);
d470f89e 2226 DIE(aTHX_ "Can't return %s from lvalue subroutine",
cd06dffe
GS		 2227 (*mark != &PL_sv_undef)
2228 ? (SvREADONLY(TOPs)
2229 ? "a readonly value" : "a temporary")
2230 : "an uninitialized value");
d470f89e 2231 }
cd06dffe 2232 else {
cd06dffe
GS		 2233 /* Can be a localized value subject to deletion. */
2234 PL_tmps_stack[++PL_tmps_ix] = *mark;
e1f15930 2235 (void)SvREFCNT_inc(*mark);
cd06dffe
GS		 2236 }
2237 }
2238 }
2239 }
2240 else {
2241 if (gimme == G_SCALAR) {
2242 temporise:
2243 MARK = newsp + 1;
2244 if (MARK <= SP) {
a8bba7fa 2245 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
cd06dffe
GS		 2246 if (SvTEMP(TOPs)) {
2247 *MARK = SvREFCNT_inc(TOPs);
2248 FREETMPS;
2249 sv_2mortal(*MARK);
2250 }
2251 else {
959e3673 2252 sv = SvREFCNT_inc(TOPs); /* FREETMPS could clobber it */
cd06dffe 2253 FREETMPS;
959e3673
GS		 2254 *MARK = sv_mortalcopy(sv);
2255 SvREFCNT_dec(sv);
cd06dffe
GS		 2256 }
2257 }
2258 else
2259 *MARK = SvTEMP(TOPs) ? TOPs : sv_mortalcopy(TOPs);
2260 }
2261 else {
2262 MEXTEND(MARK, 0);
2263 *MARK = &PL_sv_undef;
2264 }
2265 SP = MARK;
2266 }
2267 else if (gimme == G_ARRAY) {
2268 temporise_array:
2269 for (MARK = newsp + 1; MARK <= SP; MARK++) {
2270 if (!SvTEMP(*MARK)) {
2271 *MARK = sv_mortalcopy(*MARK);
2272 TAINT_NOT; /* Each item is independent */
2273 }
2274 }
2275 }
2276 }
2277 PUTBACK;
1c846c1f 2278
b0d9ce38 2279 POPSUB(cx,sv); /* Stack values are safe: release CV and @_ ... */
cd06dffe
GS		 2280 PL_curpm = newpm; /* ... and pop $1 et al */
2281
2282 LEAVE;
b0d9ce38 2283 LEAVESUB(sv);
cd06dffe
GS		 2284 return pop_return();
2285}
2286
2287
76e3520e 2288STATIC CV *
cea2e8a9 2289S_get_db_sub(pTHX_ SV **svp, CV *cv)
3de9ffa1
MB		 2290{
2291 dTHR;
3280af22 2292 SV *dbsv = GvSV(PL_DBsub);
491527d0
GS		 2293
2294 if (!PERLDB_SUB_NN) {
2295 GV *gv = CvGV(cv);
2296
2297 save_item(dbsv);
2298 if ( (CvFLAGS(cv) & (CVf_ANON | CVf_CLONED))
1c846c1f 2299 || strEQ(GvNAME(gv), "END")
491527d0
GS		 2300 || ((GvCV(gv) != cv) && /* Could be imported, and old sub redefined. */
2301 !( (SvTYPE(*svp) == SVt_PVGV) && (GvCV((GV*)*svp) == cv)
2302 && (gv = (GV*)*svp) ))) {
2303 /* Use GV from the stack as a fallback. */
2304 /* GV is potentially non-unique, or contain different CV. */
c2e66d9e
GS		 2305 SV *tmp = newRV((SV*)cv);
2306 sv_setsv(dbsv, tmp);
2307 SvREFCNT_dec(tmp);
491527d0
GS		 2308 }
2309 else {
2310 gv_efullname3(dbsv, gv, Nullch);
2311 }
3de9ffa1
MB		 2312 }
2313 else {
155aba94
GS		 2314 (void)SvUPGRADE(dbsv, SVt_PVIV);
2315 (void)SvIOK_on(dbsv);
491527d0 2316 SAVEIV(SvIVX(dbsv));
5bc28da9 2317 SvIVX(dbsv) = PTR2IV(cv); /* Do it the quickest way */
3de9ffa1 2318 }
491527d0 2319
3de9ffa1 2320 if (CvXSUB(cv))
3280af22
NIS		 2321 PL_curcopdb = PL_curcop;
2322 cv = GvCV(PL_DBsub);
3de9ffa1
MB		 2323 return cv;
2324}
2325
a0d0e21e
LW		 2326PP(pp_entersub)
2327{
4e35701f 2328 djSP; dPOPss;
a0d0e21e
LW		 2329 GV *gv;
2330 HV *stash;
2331 register CV *cv;
c09156bb 2332 register PERL_CONTEXT *cx;
5d94fbed 2333 I32 gimme;
533c011a 2334 bool hasargs = (PL_op->op_flags & OPf_STACKED) != 0;
a0d0e21e
LW		 2335
2336 if (!sv)
cea2e8a9 2337 DIE(aTHX_ "Not a CODE reference");
a0d0e21e
LW		 2338 switch (SvTYPE(sv)) {
2339 default:
2340 if (!SvROK(sv)) {
748a9306 2341 char *sym;
2d8e6c8d 2342 STRLEN n_a;
748a9306 2343
3280af22 2344 if (sv == &PL_sv_yes) { /* unfound import, ignore */
fb73857a 2345 if (hasargs)
3280af22 2346 SP = PL_stack_base + POPMARK;
a0d0e21e 2347 RETURN;
fb73857a 2348 }
15ff848f
CS		 2349 if (SvGMAGICAL(sv)) {
2350 mg_get(sv);
2351 sym = SvPOKp(sv) ? SvPVX(sv) : Nullch;
2352 }
2353 else
2d8e6c8d 2354 sym = SvPV(sv, n_a);
15ff848f 2355 if (!sym)
cea2e8a9 2356 DIE(aTHX_ PL_no_usym, "a subroutine");
533c011a 2357 if (PL_op->op_private & HINT_STRICT_REFS)
cea2e8a9 2358 DIE(aTHX_ PL_no_symref, sym, "a subroutine");
864dbfa3 2359 cv = get_cv(sym, TRUE);
a0d0e21e
LW		 2360 break;
2361 }
f5284f61
IZ		 2362 {
2363 SV **sp = &sv; /* Used in tryAMAGICunDEREF macro. */
2364 tryAMAGICunDEREF(to_cv);
2365 }
a0d0e21e
LW		 2366 cv = (CV*)SvRV(sv);
2367 if (SvTYPE(cv) == SVt_PVCV)
2368 break;
2369 /* FALL THROUGH */
2370 case SVt_PVHV:
2371 case SVt_PVAV:
cea2e8a9 2372 DIE(aTHX_ "Not a CODE reference");
a0d0e21e
LW		 2373 case SVt_PVCV:
2374 cv = (CV*)sv;
2375 break;
2376 case SVt_PVGV:
8ebc5c01 2377 if (!(cv = GvCVu((GV*)sv)))
f6ec51f7
GS		 2378 cv = sv_2cv(sv, &stash, &gv, FALSE);
2379 if (!cv) {
2380 ENTER;
2381 SAVETMPS;
2382 goto try_autoload;
2383 }
2384 break;
a0d0e21e
LW		 2385 }
2386
2387 ENTER;
2388 SAVETMPS;
2389
2390 retry:
a0d0e21e 2391 if (!CvROOT(cv) && !CvXSUB(cv)) {
44a8e56a 2392 GV* autogv;
22239a37 2393 SV* sub_name;
44a8e56a 2394
2395 /* anonymous or undef'd function leaves us no recourse */
2396 if (CvANON(cv) || !(gv = CvGV(cv)))
cea2e8a9 2397 DIE(aTHX_ "Undefined subroutine called");
67caa1fe 2398
44a8e56a 2399 /* autoloaded stub? */
2400 if (cv != GvCV(gv)) {
2401 cv = GvCV(gv);
a0d0e21e 2402 }
44a8e56a 2403 /* should call AUTOLOAD now? */
67caa1fe 2404 else {
f6ec51f7
GS		 2405try_autoload:
2406 if ((autogv = gv_autoload4(GvSTASH(gv), GvNAME(gv), GvNAMELEN(gv),
2407 FALSE)))
2408 {
2409 cv = GvCV(autogv);
2410 }
2411 /* sorry */
2412 else {
2413 sub_name = sv_newmortal();
2414 gv_efullname3(sub_name, gv, Nullch);
cea2e8a9 2415 DIE(aTHX_ "Undefined subroutine &%s called", SvPVX(sub_name));
f6ec51f7 2416 }
67caa1fe
GS		 2417 }
2418 if (!cv)
cea2e8a9 2419 DIE(aTHX_ "Not a CODE reference");
67caa1fe 2420 goto retry;
a0d0e21e
LW		 2421 }
2422
54310121 2423 gimme = GIMME_V;
67caa1fe 2424 if ((PL_op->op_private & OPpENTERSUB_DB) && GvCV(PL_DBsub) && !CvNODEBUG(cv)) {
4f01c5a5 2425 cv = get_db_sub(&sv, cv);
67caa1fe 2426 if (!cv)
cea2e8a9 2427 DIE(aTHX_ "No DBsub routine");
67caa1fe 2428 }
a0d0e21e 2429
11343788 2430#ifdef USE_THREADS
3de9ffa1
MB		 2431 /*
2432 * First we need to check if the sub or method requires locking.
458fb581
MB		 2433 * If so, we gain a lock on the CV, the first argument or the
2434 * stash (for static methods), as appropriate. This has to be
2435 * inline because for FAKE_THREADS, COND_WAIT inlines code to
2436 * reschedule by returning a new op.
3de9ffa1 2437 */
11343788 2438 MUTEX_LOCK(CvMUTEXP(cv));
77a005ab
MB		 2439 if (CvFLAGS(cv) & CVf_LOCKED) {
2440 MAGIC *mg;
2441 if (CvFLAGS(cv) & CVf_METHOD) {
533c011a
NIS		 2442 if (SP > PL_stack_base + TOPMARK)
2443 sv = *(PL_stack_base + TOPMARK + 1);
77a005ab 2444 else {
13e08037
GS		 2445 AV *av = (AV*)PL_curpad[0];
2446 if (hasargs || !av || AvFILLp(av) < 0
2447 || !(sv = AvARRAY(av)[0]))
2448 {
2449 MUTEX_UNLOCK(CvMUTEXP(cv));
d470f89e 2450 DIE(aTHX_ "no argument for locked method call");
13e08037 2451 }
77a005ab
MB		 2452 }
2453 if (SvROK(sv))
2454 sv = SvRV(sv);
458fb581
MB		 2455 else {
2456 STRLEN len;
2457 char *stashname = SvPV(sv, len);
2458 sv = (SV*)gv_stashpvn(stashname, len, TRUE);
2459 }
77a005ab
MB		 2460 }
2461 else {
2462 sv = (SV*)cv;
2463 }
2464 MUTEX_UNLOCK(CvMUTEXP(cv));
2465 mg = condpair_magic(sv);
2466 MUTEX_LOCK(MgMUTEXP(mg));
2467 if (MgOWNER(mg) == thr)
2468 MUTEX_UNLOCK(MgMUTEXP(mg));
2469 else {
2470 while (MgOWNER(mg))
2471 COND_WAIT(MgOWNERCONDP(mg), MgMUTEXP(mg));
2472 MgOWNER(mg) = thr;
bf49b057 2473 DEBUG_S(PerlIO_printf(Perl_debug_log, "%p: pp_entersub lock %p\n",
1fd28e87 2474 thr, sv);)
77a005ab 2475 MUTEX_UNLOCK(MgMUTEXP(mg));
c76ac1ee 2476 SAVEDESTRUCTOR_X(Perl_unlock_condpair, sv);
11343788 2477 }
77a005ab 2478 MUTEX_LOCK(CvMUTEXP(cv));
11343788 2479 }
3de9ffa1
MB		 2480 /*
2481 * Now we have permission to enter the sub, we must distinguish
2482 * four cases. (0) It's an XSUB (in which case we don't care
2483 * about ownership); (1) it's ours already (and we're recursing);
2484 * (2) it's free (but we may already be using a cached clone);
2485 * (3) another thread owns it. Case (1) is easy: we just use it.
2486 * Case (2) means we look for a clone--if we have one, use it
2487 * otherwise grab ownership of cv. Case (3) means we look for a
2488 * clone (for non-XSUBs) and have to create one if we don't
2489 * already have one.
2490 * Why look for a clone in case (2) when we could just grab
2491 * ownership of cv straight away? Well, we could be recursing,
2492 * i.e. we originally tried to enter cv while another thread
2493 * owned it (hence we used a clone) but it has been freed up
2494 * and we're now recursing into it. It may or may not be "better"
2495 * to use the clone but at least CvDEPTH can be trusted.
2496 */
2497 if (CvOWNER(cv) == thr || CvXSUB(cv))
2498 MUTEX_UNLOCK(CvMUTEXP(cv));
11343788 2499 else {
3de9ffa1
MB		 2500 /* Case (2) or (3) */
2501 SV **svp;
2502
11343788 2503 /*
3de9ffa1
MB		 2504 * XXX Might it be better to release CvMUTEXP(cv) while we
2505 * do the hv_fetch? We might find someone has pinched it
2506 * when we look again, in which case we would be in case
2507 * (3) instead of (2) so we'd have to clone. Would the fact
2508 * that we released the mutex more quickly make up for this?
2509 */
b099ddc0 2510 if ((svp = hv_fetch(thr->cvcache, (char *)cv, sizeof(cv), FALSE)))
6ee623d5 2511 {
3de9ffa1 2512 /* We already have a clone to use */
11343788 2513 MUTEX_UNLOCK(CvMUTEXP(cv));
3de9ffa1 2514 cv = *(CV**)svp;
bf49b057 2515 DEBUG_S(PerlIO_printf(Perl_debug_log,
1fd28e87
MB		 2516 "entersub: %p already has clone %p:%s\n",
2517 thr, cv, SvPEEK((SV*)cv)));
3de9ffa1
MB		 2518 CvOWNER(cv) = thr;
2519 SvREFCNT_inc(cv);
2520 if (CvDEPTH(cv) == 0)
c76ac1ee 2521 SAVEDESTRUCTOR_X(unset_cvowner, (void*) cv);
3de9ffa1 2522 }
11343788 2523 else {
3de9ffa1
MB		 2524 /* (2) => grab ownership of cv. (3) => make clone */
2525 if (!CvOWNER(cv)) {
2526 CvOWNER(cv) = thr;
2527 SvREFCNT_inc(cv);
11343788 2528 MUTEX_UNLOCK(CvMUTEXP(cv));
bf49b057 2529 DEBUG_S(PerlIO_printf(Perl_debug_log,
1fd28e87
MB		 2530 "entersub: %p grabbing %p:%s in stash %s\n",
2531 thr, cv, SvPEEK((SV*)cv), CvSTASH(cv) ?
3de9ffa1 2532 HvNAME(CvSTASH(cv)) : "(none)"));
cd06dffe
GS		 2533 }
2534 else {
3de9ffa1
MB		 2535 /* Make a new clone. */
2536 CV *clonecv;
2537 SvREFCNT_inc(cv); /* don't let it vanish from under us */
2538 MUTEX_UNLOCK(CvMUTEXP(cv));
bf49b057 2539 DEBUG_S((PerlIO_printf(Perl_debug_log,
1fd28e87
MB		 2540 "entersub: %p cloning %p:%s\n",
2541 thr, cv, SvPEEK((SV*)cv))));
3de9ffa1
MB		 2542 /*
2543 * We're creating a new clone so there's no race
2544 * between the original MUTEX_UNLOCK and the
2545 * SvREFCNT_inc since no one will be trying to undef
2546 * it out from underneath us. At least, I don't think
2547 * there's a race...
2548 */
2549 clonecv = cv_clone(cv);
2550 SvREFCNT_dec(cv); /* finished with this */
199100c8 2551 hv_store(thr->cvcache, (char*)cv, sizeof(cv), (SV*)clonecv,0);
3de9ffa1
MB		 2552 CvOWNER(clonecv) = thr;
2553 cv = clonecv;
11343788 2554 SvREFCNT_inc(cv);
11343788 2555 }
8b73bbec 2556 DEBUG_S(if (CvDEPTH(cv) != 0)
bf49b057 2557 PerlIO_printf(Perl_debug_log, "depth %ld != 0\n",
3de9ffa1 2558 CvDEPTH(cv)););
c76ac1ee 2559 SAVEDESTRUCTOR_X(unset_cvowner, (void*) cv);
11343788 2560 }
3de9ffa1 2561 }
11343788
MB		 2562#endif /* USE_THREADS */
2563
a0d0e21e 2564 if (CvXSUB(cv)) {
67caa1fe 2565#ifdef PERL_XSUB_OLDSTYLE
a0d0e21e 2566 if (CvOLDSTYLE(cv)) {
20ce7b12 2567 I32 (*fp3)(int,int,int);
a0d0e21e
LW		 2568 dMARK;
2569 register I32 items = SP - MARK;
67955e0c 2570 /* We dont worry to copy from @_. */
924508f0
GS		 2571 while (SP > mark) {
2572 SP[1] = SP[0];
2573 SP--;
a0d0e21e 2574 }
3280af22 2575 PL_stack_sp = mark + 1;
1d7c1841 2576 fp3 = (I32(*)(int,int,int))CvXSUB(cv);
1c846c1f 2577 items = (*fp3)(CvXSUBANY(cv).any_i32,
3280af22 2578 MARK - PL_stack_base + 1,
ecfc5424 2579 items);
3280af22 2580 PL_stack_sp = PL_stack_base + items;
a0d0e21e 2581 }
67caa1fe
GS		 2582 else
2583#endif /* PERL_XSUB_OLDSTYLE */
2584 {
748a9306
LW		 2585 I32 markix = TOPMARK;
2586
a0d0e21e 2587 PUTBACK;
67955e0c 2588
2589 if (!hasargs) {
2590 /* Need to copy @_ to stack. Alternative may be to
2591 * switch stack to @_, and copy return values
2592 * back. This would allow popping @_ in XSUB, e.g.. XXXX */
6d4ff0d2
MB		 2593 AV* av;
2594 I32 items;
2595#ifdef USE_THREADS
533c011a 2596 av = (AV*)PL_curpad[0];
6d4ff0d2 2597#else
3280af22 2598 av = GvAV(PL_defgv);
6d4ff0d2 2599#endif /* USE_THREADS */
93965878 2600 items = AvFILLp(av) + 1; /* @_ is not tieable */
67955e0c 2601
2602 if (items) {
2603 /* Mark is at the end of the stack. */
924508f0
GS		 2604 EXTEND(SP, items);
2605 Copy(AvARRAY(av), SP + 1, items, SV*);
2606 SP += items;
1c846c1f 2607 PUTBACK ;
67955e0c 2608 }
2609 }
67caa1fe
GS		 2610 /* We assume first XSUB in &DB::sub is the called one. */
2611 if (PL_curcopdb) {
1d7c1841 2612 SAVEVPTR(PL_curcop);
3280af22
NIS		 2613 PL_curcop = PL_curcopdb;
2614 PL_curcopdb = NULL;
67955e0c 2615 }
2616 /* Do we need to open block here? XXXX */
0cb96387 2617 (void)(*CvXSUB(cv))(aTHXo_ cv);
748a9306
LW		 2618
2619 /* Enforce some sanity in scalar context. */
3280af22
NIS		 2620 if (gimme == G_SCALAR && ++markix != PL_stack_sp - PL_stack_base ) {
2621 if (markix > PL_stack_sp - PL_stack_base)
2622 *(PL_stack_base + markix) = &PL_sv_undef;
748a9306 2623 else
3280af22
NIS		 2624 *(PL_stack_base + markix) = *PL_stack_sp;
2625 PL_stack_sp = PL_stack_base + markix;
748a9306 2626 }
a0d0e21e
LW		 2627 }
2628 LEAVE;
2629 return NORMAL;
2630 }
2631 else {
2632 dMARK;
2633 register I32 items = SP - MARK;
a0d0e21e
LW		 2634 AV* padlist = CvPADLIST(cv);
2635 SV** svp = AvARRAY(padlist);
533c011a 2636 push_return(PL_op->op_next);
a0d0e21e
LW		 2637 PUSHBLOCK(cx, CXt_SUB, MARK);
2638 PUSHSUB(cx);
2639 CvDEPTH(cv)++;
6b35e009
GS		 2640 /* XXX This would be a natural place to set C<PL_compcv = cv> so
2641 * that eval'' ops within this sub know the correct lexical space.
2642 * Owing the speed considerations, we choose to search for the cv
2643 * in doeval() instead.
2644 */
a0d0e21e
LW		 2645 if (CvDEPTH(cv) < 2)
2646 (void)SvREFCNT_inc(cv);
2647 else { /* save temporaries on recursion? */
1d7c1841 2648 PERL_STACK_OVERFLOW_CHECK();
93965878 2649 if (CvDEPTH(cv) > AvFILLp(padlist)) {
a0d0e21e
LW		 2650 AV *av;
2651 AV *newpad = newAV();
4aa0a1f7 2652 SV **oldpad = AvARRAY(svp[CvDEPTH(cv)-1]);
93965878 2653 I32 ix = AvFILLp((AV*)svp[1]);
1d7c1841 2654 I32 names_fill = AvFILLp((AV*)svp[0]);
a0d0e21e 2655 svp = AvARRAY(svp[0]);
748a9306 2656 for ( ;ix > 0; ix--) {
1d7c1841 2657 if (names_fill >= ix && svp[ix] != &PL_sv_undef) {
748a9306 2658 char *name = SvPVX(svp[ix]);
5f05dabc 2659 if ((SvFLAGS(svp[ix]) & SVf_FAKE) /* outer lexical? */
2660 || *name == '&') /* anonymous code? */
2661 {
2662 av_store(newpad, ix, SvREFCNT_inc(oldpad[ix]));
748a9306
LW		 2663 }
2664 else { /* our own lexical */
2665 if (*name == '@')
2666 av_store(newpad, ix, sv = (SV*)newAV());
2667 else if (*name == '%')
2668 av_store(newpad, ix, sv = (SV*)newHV());
2669 else
2670 av_store(newpad, ix, sv = NEWSV(0,0));
2671 SvPADMY_on(sv);
2672 }
a0d0e21e 2673 }
1d7c1841
GS		 2674 else if (IS_PADGV(oldpad[ix]) || IS_PADCONST(oldpad[ix])) {
2675 av_store(newpad, ix, sv = SvREFCNT_inc(oldpad[ix]));
2676 }
a0d0e21e 2677 else {
748a9306 2678 av_store(newpad, ix, sv = NEWSV(0,0));
a0d0e21e
LW		 2679 SvPADTMP_on(sv);
2680 }
2681 }
2682 av = newAV(); /* will be @_ */
2683 av_extend(av, 0);
2684 av_store(newpad, 0, (SV*)av);
2685 AvFLAGS(av) = AVf_REIFY;
2686 av_store(padlist, CvDEPTH(cv), (SV*)newpad);
93965878 2687 AvFILLp(padlist) = CvDEPTH(cv);
a0d0e21e
LW		 2688 svp = AvARRAY(padlist);
2689 }
2690 }
6d4ff0d2
MB		 2691#ifdef USE_THREADS
2692 if (!hasargs) {
533c011a 2693 AV* av = (AV*)PL_curpad[0];
6d4ff0d2 2694
93965878 2695 items = AvFILLp(av) + 1;
6d4ff0d2
MB		 2696 if (items) {
2697 /* Mark is at the end of the stack. */
924508f0
GS		 2698 EXTEND(SP, items);
2699 Copy(AvARRAY(av), SP + 1, items, SV*);
2700 SP += items;
1c846c1f 2701 PUTBACK ;
6d4ff0d2
MB		 2702 }
2703 }
2704#endif /* USE_THREADS */
1d7c1841 2705 SAVEVPTR(PL_curpad);
3280af22 2706 PL_curpad = AvARRAY((AV*)svp[CvDEPTH(cv)]);
6d4ff0d2
MB		 2707#ifndef USE_THREADS
2708 if (hasargs)
2709#endif /* USE_THREADS */
2710 {
2711 AV* av;
a0d0e21e
LW		 2712 SV** ary;
2713
77a005ab 2714#if 0
bf49b057 2715 DEBUG_S(PerlIO_printf(Perl_debug_log,
0f15f207 2716 "%p entersub preparing @_\n", thr));
77a005ab 2717#endif
3280af22 2718 av = (AV*)PL_curpad[0];
221373f0
GS		 2719 if (AvREAL(av)) {
2720 /* @_ is normally not REAL--this should only ever
2721 * happen when DB::sub() calls things that modify @_ */
2722 av_clear(av);
2723 AvREAL_off(av);
2724 AvREIFY_on(av);
2725 }
6d4ff0d2 2726#ifndef USE_THREADS
3280af22
NIS		 2727 cx->blk_sub.savearray = GvAV(PL_defgv);
2728 GvAV(PL_defgv) = (AV*)SvREFCNT_inc(av);
6d4ff0d2 2729#endif /* USE_THREADS */
7032098e 2730 cx->blk_sub.oldcurpad = PL_curpad;
6d4ff0d2 2731 cx->blk_sub.argarray = av;
a0d0e21e
LW		 2732 ++MARK;
2733
2734 if (items > AvMAX(av) + 1) {
2735 ary = AvALLOC(av);
2736 if (AvARRAY(av) != ary) {
2737 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
2738 SvPVX(av) = (char*)ary;
2739 }
2740 if (items > AvMAX(av) + 1) {
2741 AvMAX(av) = items - 1;
2742 Renew(ary,items,SV*);
2743 AvALLOC(av) = ary;
2744 SvPVX(av) = (char*)ary;
2745 }
2746 }
2747 Copy(MARK,AvARRAY(av),items,SV*);
93965878 2748 AvFILLp(av) = items - 1;
1c846c1f 2749
a0d0e21e
LW		 2750 while (items--) {
2751 if (*MARK)
2752 SvTEMP_off(*MARK);
2753 MARK++;
2754 }
2755 }
4a925ff6
GS		 2756 /* warning must come *after* we fully set up the context
2757 * stuff so that __WARN__ handlers can safely dounwind()
2758 * if they want to
2759 */
2760 if (CvDEPTH(cv) == 100 && ckWARN(WARN_RECURSION)
2761 && !(PERLDB_SUB && cv == GvCV(PL_DBsub)))
2762 sub_crush_depth(cv);
77a005ab 2763#if 0
bf49b057 2764 DEBUG_S(PerlIO_printf(Perl_debug_log,
0f15f207 2765 "%p entersub returning %p\n", thr, CvSTART(cv)));
77a005ab 2766#endif
a0d0e21e
LW		 2767 RETURNOP(CvSTART(cv));
2768 }
2769}
2770
44a8e56a 2771void
864dbfa3 2772Perl_sub_crush_depth(pTHX_ CV *cv)
44a8e56a 2773{
2774 if (CvANON(cv))
cea2e8a9 2775 Perl_warner(aTHX_ WARN_RECURSION, "Deep recursion on anonymous subroutine");
44a8e56a 2776 else {
2777 SV* tmpstr = sv_newmortal();
2778 gv_efullname3(tmpstr, CvGV(cv), Nullch);
1c846c1f 2779 Perl_warner(aTHX_ WARN_RECURSION, "Deep recursion on subroutine \"%s\"",
599cee73 2780 SvPVX(tmpstr));
44a8e56a 2781 }
2782}
2783
a0d0e21e
LW		 2784PP(pp_aelem)
2785{
4e35701f 2786 djSP;
a0d0e21e 2787 SV** svp;
467f0320 2788 IV elem = POPi;
68dc0745 2789 AV* av = (AV*)POPs;
533c011a
NIS		 2790 U32 lval = PL_op->op_flags & OPf_MOD;
2791 U32 defer = (PL_op->op_private & OPpLVAL_DEFER) && (elem > AvFILL(av));
be6c24e0 2792 SV *sv;
a0d0e21e 2793
748a9306 2794 if (elem > 0)
3280af22 2795 elem -= PL_curcop->cop_arybase;
a0d0e21e
LW		 2796 if (SvTYPE(av) != SVt_PVAV)
2797 RETPUSHUNDEF;
68dc0745 2798 svp = av_fetch(av, elem, lval && !defer);
a0d0e21e 2799 if (lval) {
3280af22 2800 if (!svp || *svp == &PL_sv_undef) {
68dc0745 2801 SV* lv;
2802 if (!defer)
cea2e8a9 2803 DIE(aTHX_ PL_no_aelem, elem);
68dc0745 2804 lv = sv_newmortal();
2805 sv_upgrade(lv, SVt_PVLV);
2806 LvTYPE(lv) = 'y';
2807 sv_magic(lv, Nullsv, 'y', Nullch, 0);
2808 LvTARG(lv) = SvREFCNT_inc(av);
2809 LvTARGOFF(lv) = elem;
2810 LvTARGLEN(lv) = 1;
2811 PUSHs(lv);
2812 RETURN;
2813 }
533c011a 2814 if (PL_op->op_private & OPpLVAL_INTRO)
161b7d16 2815 save_aelem(av, elem, svp);
533c011a
NIS		 2816 else if (PL_op->op_private & OPpDEREF)
2817 vivify_ref(*svp, PL_op->op_private & OPpDEREF);
a0d0e21e 2818 }
3280af22 2819 sv = (svp ? *svp : &PL_sv_undef);
be6c24e0
GS		 2820 if (!lval && SvGMAGICAL(sv)) /* see note in pp_helem() */
2821 sv = sv_mortalcopy(sv);
2822 PUSHs(sv);
a0d0e21e
LW		 2823 RETURN;
2824}
2825
02a9e968 2826void
864dbfa3 2827Perl_vivify_ref(pTHX_ SV *sv, U32 to_what)
02a9e968
CS		 2828{
2829 if (SvGMAGICAL(sv))
2830 mg_get(sv);
2831 if (!SvOK(sv)) {
2832 if (SvREADONLY(sv))
cea2e8a9 2833 Perl_croak(aTHX_ PL_no_modify);
5f05dabc 2834 if (SvTYPE(sv) < SVt_RV)
2835 sv_upgrade(sv, SVt_RV);
2836 else if (SvTYPE(sv) >= SVt_PV) {
2837 (void)SvOOK_off(sv);
2838 Safefree(SvPVX(sv));
2839 SvLEN(sv) = SvCUR(sv) = 0;
2840 }
68dc0745 2841 switch (to_what) {
5f05dabc 2842 case OPpDEREF_SV:
8c52afec 2843 SvRV(sv) = NEWSV(355,0);
5f05dabc 2844 break;
2845 case OPpDEREF_AV:
2846 SvRV(sv) = (SV*)newAV();
2847 break;
2848 case OPpDEREF_HV:
2849 SvRV(sv) = (SV*)newHV();
2850 break;
2851 }
02a9e968
CS		 2852 SvROK_on(sv);
2853 SvSETMAGIC(sv);
2854 }
2855}
2856
a0d0e21e
LW		 2857PP(pp_method)
2858{
4e35701f 2859 djSP;
f5d5a27c
CS		 2860 SV* sv = TOPs;
2861
2862 if (SvROK(sv)) {
eda383f2 2863 SV* rsv = SvRV(sv);
f5d5a27c
CS		 2864 if (SvTYPE(rsv) == SVt_PVCV) {
2865 SETs(rsv);
2866 RETURN;
2867 }
2868 }
2869
2870 SETs(method_common(sv, Null(U32*)));
2871 RETURN;
2872}
2873
2874PP(pp_method_named)
2875{
2876 djSP;
2877 SV* sv = cSVOP->op_sv;
2878 U32 hash = SvUVX(sv);
2879
2880 XPUSHs(method_common(sv, &hash));
2881 RETURN;
2882}
2883
2884STATIC SV *
2885S_method_common(pTHX_ SV* meth, U32* hashp)
2886{
a0d0e21e
LW		 2887 SV* sv;
2888 SV* ob;
2889 GV* gv;
56304f61
CS		 2890 HV* stash;
2891 char* name;
f5d5a27c 2892 STRLEN namelen;
ac91690f
CS		 2893 char* packname;
2894 STRLEN packlen;
a0d0e21e 2895
f5d5a27c 2896 name = SvPV(meth, namelen);
3280af22 2897 sv = *(PL_stack_base + TOPMARK + 1);
f5d5a27c 2898
4f1b7578
SC		 2899 if (!sv)
2900 Perl_croak(aTHX_ "Can't call method \"%s\" on an undefined value", name);
2901
16d20bd9
AD		 2902 if (SvGMAGICAL(sv))
2903 mg_get(sv);
a0d0e21e 2904 if (SvROK(sv))
16d20bd9 2905 ob = (SV*)SvRV(sv);
a0d0e21e
LW		 2906 else {
2907 GV* iogv;
a0d0e21e 2908
56304f61 2909 packname = Nullch;
a0d0e21e 2910 if (!SvOK(sv) ||
56304f61 2911 !(packname = SvPV(sv, packlen)) ||
a0d0e21e
LW		 2912 !(iogv = gv_fetchpv(packname, FALSE, SVt_PVIO)) ||
2913 !(ob=(SV*)GvIO(iogv)))
2914 {
1c846c1f 2915 if (!packname ||
7e2040f0 2916 ((*(U8*)packname >= 0xc0 && DO_UTF8(sv))
b86a2fa7 2917 ? !isIDFIRST_utf8((U8*)packname)
834a4ddd
LW		 2918 : !isIDFIRST(*packname)
2919 ))
2920 {
f5d5a27c
CS		 2921 Perl_croak(aTHX_ "Can't call method \"%s\" %s", name,
2922 SvOK(sv) ? "without a package or object reference"
2923 : "on an undefined value");
834a4ddd 2924 }
56304f61 2925 stash = gv_stashpvn(packname, packlen, TRUE);
ac91690f 2926 goto fetch;
a0d0e21e 2927 }
3280af22 2928 *(PL_stack_base + TOPMARK + 1) = sv_2mortal(newRV((SV*)iogv));
a0d0e21e
LW		 2929 }
2930
f0d43078
GS		 2931 if (!ob || !(SvOBJECT(ob)
2932 || (SvTYPE(ob) == SVt_PVGV && (ob = (SV*)GvIO((GV*)ob))
2933 && SvOBJECT(ob))))
2934 {
f5d5a27c
CS		 2935 Perl_croak(aTHX_ "Can't call method \"%s\" on unblessed reference",
2936 name);
f0d43078 2937 }
a0d0e21e 2938
56304f61 2939 stash = SvSTASH(ob);
a0d0e21e 2940
ac91690f 2941 fetch:
f5d5a27c
CS		 2942 /* shortcut for simple names */
2943 if (hashp) {
2944 HE* he = hv_fetch_ent(stash, meth, 0, *hashp);
2945 if (he) {
2946 gv = (GV*)HeVAL(he);
2947 if (isGV(gv) && GvCV(gv) &&
2948 (!GvCVGEN(gv) || GvCVGEN(gv) == PL_sub_generation))
2949 return (SV*)GvCV(gv);
2950 }
2951 }
2952
ac91690f 2953 gv = gv_fetchmethod(stash, name);
56304f61
CS		 2954 if (!gv) {
2955 char* leaf = name;
2956 char* sep = Nullch;
2957 char* p;
c1899e02 2958 GV* gv;
56304f61
CS		 2959
2960 for (p = name; *p; p++) {
2961 if (*p == '\'')
2962 sep = p, leaf = p + 1;
2963 else if (*p == ':' && *(p + 1) == ':')
2964 sep = p, leaf = p + 2;
2965 }
2966 if (!sep || ((sep - name) == 5 && strnEQ(name, "SUPER", 5))) {
1d7c1841 2967 packname = sep ? CopSTASHPV(PL_curcop) : HvNAME(stash);
56304f61
CS		 2968 packlen = strlen(packname);
2969 }
2970 else {
2971 packname = name;
2972 packlen = sep - name;
2973 }
c1899e02
GS		 2974 gv = gv_fetchpv(packname, 0, SVt_PVHV);
2975 if (gv && isGV(gv)) {
2976 Perl_croak(aTHX_
2977 "Can't locate object method \"%s\" via package \"%s\"",
2978 leaf, packname);
2979 }
2980 else {
2981 Perl_croak(aTHX_
f6e565ef 2982 "Can't locate object method \"%s\" via package \"%s\""
c1899e02
GS		 2983 " (perhaps you forgot to load \"%s\"?)",
2984 leaf, packname, packname);
2985 }
56304f61 2986 }
f5d5a27c 2987 return isGV(gv) ? (SV*)GvCV(gv) : (SV*)gv;
a0d0e21e 2988}
22239a37 2989
51371543
GS		 2990#ifdef USE_THREADS
2991static void
2992unset_cvowner(pTHXo_ void *cvarg)
2993{
2994 register CV* cv = (CV *) cvarg;
2995#ifdef DEBUGGING
2996 dTHR;
2997#endif /* DEBUGGING */
2998
bf49b057 2999 DEBUG_S((PerlIO_printf(Perl_debug_log, "%p unsetting CvOWNER of %p:%s\n",
51371543
GS		 3000 thr, cv, SvPEEK((SV*)cv))));
3001 MUTEX_LOCK(CvMUTEXP(cv));
3002 DEBUG_S(if (CvDEPTH(cv) != 0)
bf49b057 3003 PerlIO_printf(Perl_debug_log, "depth %ld != 0\n",
51371543
GS		 3004 CvDEPTH(cv)););
3005 assert(thr == CvOWNER(cv));
3006 CvOWNER(cv) = 0;
3007 MUTEX_UNLOCK(CvMUTEXP(cv));
3008 SvREFCNT_dec(cv);
3009}
3010#endif /* USE_THREADS */
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