This is a live mirror of the Perl 5 development currently hosted at https://github.com/perl/perl5
Remove warning about casting integer to different sized pointer.
[perl5.git] / pp_hot.c
CommitLineData
a0d0e21e
LW
1/* pp_hot.c
2 *
4bb101f2 3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
fdf8c088 4 * 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 by Larry Wall and others
a0d0e21e
LW
5 *
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
8 *
9 */
10
11/*
12 * Then he heard Merry change the note, and up went the Horn-cry of Buckland,
13 * shaking the air.
14 *
15 * Awake! Awake! Fear, Fire, Foes! Awake!
16 * Fire, Foes! Awake!
17 */
18
166f8a29
DM
19/* This file contains 'hot' pp ("push/pop") functions that
20 * execute the opcodes that make up a perl program. A typical pp function
21 * expects to find its arguments on the stack, and usually pushes its
22 * results onto the stack, hence the 'pp' terminology. Each OP structure
23 * contains a pointer to the relevant pp_foo() function.
24 *
25 * By 'hot', we mean common ops whose execution speed is critical.
26 * By gathering them together into a single file, we encourage
27 * CPU cache hits on hot code. Also it could be taken as a warning not to
28 * change any code in this file unless you're sure it won't affect
29 * performance.
30 */
31
a0d0e21e 32#include "EXTERN.h"
864dbfa3 33#define PERL_IN_PP_HOT_C
a0d0e21e
LW
34#include "perl.h"
35
36/* Hot code. */
37
38PP(pp_const)
39{
97aff369 40 dVAR;
39644a26 41 dSP;
0282be92
RGS
42 if ( PL_op->op_flags & OPf_SPECIAL )
43 /* This is a const op added to hold the hints hash for
44 pp_entereval. The hash can be modified by the code
45 being eval'ed, so we return a copy instead. */
46 XPUSHs(sv_2mortal((SV*)Perl_hv_copy_hints_hv(aTHX_ (HV*)cSVOP_sv)));
47 else
48 /* Normal const. */
49 XPUSHs(cSVOP_sv);
a0d0e21e
LW
50 RETURN;
51}
52
53PP(pp_nextstate)
54{
97aff369 55 dVAR;
533c011a 56 PL_curcop = (COP*)PL_op;
a0d0e21e 57 TAINT_NOT; /* Each statement is presumed innocent */
3280af22 58 PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
a0d0e21e
LW
59 FREETMPS;
60 return NORMAL;
61}
62
63PP(pp_gvsv)
64{
97aff369 65 dVAR;
39644a26 66 dSP;
924508f0 67 EXTEND(SP,1);
533c011a 68 if (PL_op->op_private & OPpLVAL_INTRO)
1d7c1841 69 PUSHs(save_scalar(cGVOP_gv));
a0d0e21e 70 else
c69033f2 71 PUSHs(GvSVn(cGVOP_gv));
a0d0e21e
LW
72 RETURN;
73}
74
75PP(pp_null)
76{
97aff369 77 dVAR;
a0d0e21e
LW
78 return NORMAL;
79}
80
7399586d
HS
81PP(pp_setstate)
82{
97aff369 83 dVAR;
7399586d
HS
84 PL_curcop = (COP*)PL_op;
85 return NORMAL;
86}
87
a0d0e21e
LW
88PP(pp_pushmark)
89{
97aff369 90 dVAR;
3280af22 91 PUSHMARK(PL_stack_sp);
a0d0e21e
LW
92 return NORMAL;
93}
94
95PP(pp_stringify)
96{
97aff369 97 dVAR; dSP; dTARGET;
6050d10e 98 sv_copypv(TARG,TOPs);
a0d0e21e
LW
99 SETTARG;
100 RETURN;
101}
102
103PP(pp_gv)
104{
97aff369 105 dVAR; dSP;
1d7c1841 106 XPUSHs((SV*)cGVOP_gv);
a0d0e21e
LW
107 RETURN;
108}
109
110PP(pp_and)
111{
97aff369 112 dVAR; dSP;
a0d0e21e
LW
113 if (!SvTRUE(TOPs))
114 RETURN;
115 else {
c960fc3b
SP
116 if (PL_op->op_type == OP_AND)
117 --SP;
a0d0e21e
LW
118 RETURNOP(cLOGOP->op_other);
119 }
120}
121
122PP(pp_sassign)
123{
97aff369 124 dVAR; dSP; dPOPTOPssrl;
748a9306 125
533c011a 126 if (PL_op->op_private & OPpASSIGN_BACKWARDS) {
0bd48802
AL
127 SV * const temp = left;
128 left = right; right = temp;
a0d0e21e 129 }
3280af22 130 if (PL_tainting && PL_tainted && !SvTAINTED(left))
a0d0e21e 131 TAINT_NOT;
e26df76a 132 if (PL_op->op_private & OPpASSIGN_CV_TO_GV) {
6136c704 133 SV * const cv = SvRV(left);
e26df76a
NC
134 const U32 cv_type = SvTYPE(cv);
135 const U32 gv_type = SvTYPE(right);
6136c704 136 const bool got_coderef = cv_type == SVt_PVCV || cv_type == SVt_PVFM;
e26df76a
NC
137
138 if (!got_coderef) {
139 assert(SvROK(cv));
140 }
141
ae6d515f 142 /* Can do the optimisation if right (LVALUE) is not a typeglob,
e26df76a
NC
143 left (RVALUE) is a reference to something, and we're in void
144 context. */
145 if (!got_coderef && gv_type != SVt_PVGV && GIMME_V == G_VOID) {
146 /* Is the target symbol table currently empty? */
6136c704 147 GV * const gv = gv_fetchsv(right, GV_NOINIT, SVt_PVGV);
bb112e5a 148 if (SvTYPE(gv) != SVt_PVGV && !SvOK(gv)) {
e26df76a
NC
149 /* Good. Create a new proxy constant subroutine in the target.
150 The gv becomes a(nother) reference to the constant. */
151 SV *const value = SvRV(cv);
152
153 SvUPGRADE((SV *)gv, SVt_RV);
1ccdb730 154 SvPCS_IMPORTED_on(gv);
e26df76a 155 SvRV_set(gv, value);
b37c2d43 156 SvREFCNT_inc_simple_void(value);
e26df76a
NC
157 SETs(right);
158 RETURN;
159 }
160 }
161
162 /* Need to fix things up. */
163 if (gv_type != SVt_PVGV) {
164 /* Need to fix GV. */
165 right = (SV*)gv_fetchsv(right, GV_ADD, SVt_PVGV);
166 }
167
168 if (!got_coderef) {
169 /* We've been returned a constant rather than a full subroutine,
170 but they expect a subroutine reference to apply. */
53a42478
NC
171 if (SvROK(cv)) {
172 ENTER;
173 SvREFCNT_inc_void(SvRV(cv));
174 /* newCONSTSUB takes a reference count on the passed in SV
175 from us. We set the name to NULL, otherwise we get into
176 all sorts of fun as the reference to our new sub is
177 donated to the GV that we're about to assign to.
178 */
179 SvRV_set(left, (SV *)newCONSTSUB(GvSTASH(right), NULL,
e26df76a 180 SvRV(cv)));
53a42478
NC
181 SvREFCNT_dec(cv);
182 LEAVE;
183 } else {
184 /* What can happen for the corner case *{"BONK"} = \&{"BONK"};
185 is that
186 First: ops for \&{"BONK"}; return us the constant in the
187 symbol table
188 Second: ops for *{"BONK"} cause that symbol table entry
189 (and our reference to it) to be upgraded from RV
190 to typeblob)
191 Thirdly: We get here. cv is actually PVGV now, and its
192 GvCV() is actually the subroutine we're looking for
193
194 So change the reference so that it points to the subroutine
195 of that typeglob, as that's what they were after all along.
196 */
197 GV *const upgraded = (GV *) cv;
198 CV *const source = GvCV(upgraded);
199
200 assert(source);
201 assert(CvFLAGS(source) & CVf_CONST);
202
203 SvREFCNT_inc_void(source);
204 SvREFCNT_dec(upgraded);
205 SvRV_set(left, (SV *)source);
206 }
e26df76a 207 }
53a42478 208
e26df76a 209 }
54310121 210 SvSetMagicSV(right, left);
a0d0e21e
LW
211 SETs(right);
212 RETURN;
213}
214
215PP(pp_cond_expr)
216{
97aff369 217 dVAR; dSP;
a0d0e21e 218 if (SvTRUEx(POPs))
1a67a97c 219 RETURNOP(cLOGOP->op_other);
a0d0e21e 220 else
1a67a97c 221 RETURNOP(cLOGOP->op_next);
a0d0e21e
LW
222}
223
224PP(pp_unstack)
225{
97aff369 226 dVAR;
a0d0e21e
LW
227 I32 oldsave;
228 TAINT_NOT; /* Each statement is presumed innocent */
3280af22 229 PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
a0d0e21e 230 FREETMPS;
3280af22 231 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e
LW
232 LEAVE_SCOPE(oldsave);
233 return NORMAL;
234}
235
a0d0e21e
LW
236PP(pp_concat)
237{
97aff369 238 dVAR; dSP; dATARGET; tryAMAGICbin(concat,opASSIGN);
748a9306
LW
239 {
240 dPOPTOPssrl;
8d6d96c1
HS
241 bool lbyte;
242 STRLEN rlen;
d4c19fe8 243 const char *rpv = NULL;
a6b599c7 244 bool rbyte = FALSE;
a9c4fd4e 245 bool rcopied = FALSE;
8d6d96c1
HS
246
247 if (TARG == right && right != left) {
c75ab21a
RH
248 /* mg_get(right) may happen here ... */
249 rpv = SvPV_const(right, rlen);
250 rbyte = !DO_UTF8(right);
8d6d96c1 251 right = sv_2mortal(newSVpvn(rpv, rlen));
349d4f2f 252 rpv = SvPV_const(right, rlen); /* no point setting UTF-8 here */
db79b45b 253 rcopied = TRUE;
8d6d96c1 254 }
7889fe52 255
8d6d96c1 256 if (TARG != left) {
a9c4fd4e 257 STRLEN llen;
5c144d81 258 const char* const lpv = SvPV_const(left, llen); /* mg_get(left) may happen here */
90f5826e 259 lbyte = !DO_UTF8(left);
8d6d96c1
HS
260 sv_setpvn(TARG, lpv, llen);
261 if (!lbyte)
262 SvUTF8_on(TARG);
263 else
264 SvUTF8_off(TARG);
265 }
266 else { /* TARG == left */
a9c4fd4e 267 STRLEN llen;
5b295bef 268 SvGETMAGIC(left); /* or mg_get(left) may happen here */
c75ab21a
RH
269 if (!SvOK(TARG)) {
270 if (left == right && ckWARN(WARN_UNINITIALIZED))
271 report_uninit(right);
c69006e4 272 sv_setpvn(left, "", 0);
c75ab21a 273 }
10516c54 274 (void)SvPV_nomg_const(left, llen); /* Needed to set UTF8 flag */
90f5826e
ST
275 lbyte = !DO_UTF8(left);
276 if (IN_BYTES)
277 SvUTF8_off(TARG);
8d6d96c1 278 }
a12c0f56 279
c75ab21a
RH
280 /* or mg_get(right) may happen here */
281 if (!rcopied) {
282 rpv = SvPV_const(right, rlen);
283 rbyte = !DO_UTF8(right);
284 }
8d6d96c1
HS
285 if (lbyte != rbyte) {
286 if (lbyte)
287 sv_utf8_upgrade_nomg(TARG);
288 else {
db79b45b
JH
289 if (!rcopied)
290 right = sv_2mortal(newSVpvn(rpv, rlen));
8d6d96c1 291 sv_utf8_upgrade_nomg(right);
349d4f2f 292 rpv = SvPV_const(right, rlen);
69b47968 293 }
a0d0e21e 294 }
8d6d96c1 295 sv_catpvn_nomg(TARG, rpv, rlen);
43ebc500 296
a0d0e21e
LW
297 SETTARG;
298 RETURN;
748a9306 299 }
a0d0e21e
LW
300}
301
302PP(pp_padsv)
303{
97aff369 304 dVAR; dSP; dTARGET;
a0d0e21e 305 XPUSHs(TARG);
533c011a
NIS
306 if (PL_op->op_flags & OPf_MOD) {
307 if (PL_op->op_private & OPpLVAL_INTRO)
952306ac
RGS
308 if (!(PL_op->op_private & OPpPAD_STATE))
309 SAVECLEARSV(PAD_SVl(PL_op->op_targ));
a62b51b8 310 if (PL_op->op_private & OPpDEREF) {
8ec5e241 311 PUTBACK;
dd2155a4 312 vivify_ref(PAD_SVl(PL_op->op_targ), PL_op->op_private & OPpDEREF);
8ec5e241
NIS
313 SPAGAIN;
314 }
4633a7c4 315 }
a0d0e21e
LW
316 RETURN;
317}
318
319PP(pp_readline)
320{
97aff369 321 dVAR;
f5284f61 322 tryAMAGICunTARGET(iter, 0);
3280af22 323 PL_last_in_gv = (GV*)(*PL_stack_sp--);
8efb3254 324 if (SvTYPE(PL_last_in_gv) != SVt_PVGV) {
1c846c1f 325 if (SvROK(PL_last_in_gv) && SvTYPE(SvRV(PL_last_in_gv)) == SVt_PVGV)
f5284f61 326 PL_last_in_gv = (GV*)SvRV(PL_last_in_gv);
8efb3254 327 else {
f5284f61
IZ
328 dSP;
329 XPUSHs((SV*)PL_last_in_gv);
330 PUTBACK;
cea2e8a9 331 pp_rv2gv();
f5284f61 332 PL_last_in_gv = (GV*)(*PL_stack_sp--);
f5284f61
IZ
333 }
334 }
a0d0e21e
LW
335 return do_readline();
336}
337
338PP(pp_eq)
339{
97aff369 340 dVAR; dSP; tryAMAGICbinSET(eq,0);
4c9fe80f 341#ifndef NV_PRESERVES_UV
0bdaccee 342 if (SvROK(TOPs) && !SvAMAGIC(TOPs) && SvROK(TOPm1s) && !SvAMAGIC(TOPm1s)) {
e61d22ef
NC
343 SP--;
344 SETs(boolSV(SvRV(TOPs) == SvRV(TOPp1s)));
4c9fe80f
AS
345 RETURN;
346 }
347#endif
28e5dec8
JH
348#ifdef PERL_PRESERVE_IVUV
349 SvIV_please(TOPs);
350 if (SvIOK(TOPs)) {
4c9fe80f
AS
351 /* Unless the left argument is integer in range we are going
352 to have to use NV maths. Hence only attempt to coerce the
353 right argument if we know the left is integer. */
28e5dec8
JH
354 SvIV_please(TOPm1s);
355 if (SvIOK(TOPm1s)) {
0bd48802
AL
356 const bool auvok = SvUOK(TOPm1s);
357 const bool buvok = SvUOK(TOPs);
a12c0f56 358
1605159e
NC
359 if (auvok == buvok) { /* ## IV == IV or UV == UV ## */
360 /* Casting IV to UV before comparison isn't going to matter
361 on 2s complement. On 1s complement or sign&magnitude
362 (if we have any of them) it could to make negative zero
363 differ from normal zero. As I understand it. (Need to
364 check - is negative zero implementation defined behaviour
365 anyway?). NWC */
0bd48802
AL
366 const UV buv = SvUVX(POPs);
367 const UV auv = SvUVX(TOPs);
28e5dec8 368
28e5dec8
JH
369 SETs(boolSV(auv == buv));
370 RETURN;
371 }
372 { /* ## Mixed IV,UV ## */
1605159e 373 SV *ivp, *uvp;
28e5dec8 374 IV iv;
28e5dec8 375
1605159e 376 /* == is commutative so doesn't matter which is left or right */
28e5dec8 377 if (auvok) {
1605159e
NC
378 /* top of stack (b) is the iv */
379 ivp = *SP;
380 uvp = *--SP;
381 } else {
382 uvp = *SP;
383 ivp = *--SP;
384 }
385 iv = SvIVX(ivp);
d4c19fe8 386 if (iv < 0)
1605159e
NC
387 /* As uv is a UV, it's >0, so it cannot be == */
388 SETs(&PL_sv_no);
d4c19fe8
AL
389 else
390 /* we know iv is >= 0 */
391 SETs(boolSV((UV)iv == SvUVX(uvp)));
28e5dec8
JH
392 RETURN;
393 }
394 }
395 }
396#endif
a0d0e21e 397 {
cab190d4
JD
398#if defined(NAN_COMPARE_BROKEN) && defined(Perl_isnan)
399 dPOPTOPnnrl;
400 if (Perl_isnan(left) || Perl_isnan(right))
401 RETSETNO;
402 SETs(boolSV(left == right));
403#else
a0d0e21e 404 dPOPnv;
54310121 405 SETs(boolSV(TOPn == value));
cab190d4 406#endif
a0d0e21e
LW
407 RETURN;
408 }
409}
410
411PP(pp_preinc)
412{
97aff369 413 dVAR; dSP;
f39684df 414 if (SvTYPE(TOPs) >= SVt_PVGV && SvTYPE(TOPs) != SVt_PVLV)
d470f89e 415 DIE(aTHX_ PL_no_modify);
3510b4a1
NC
416 if (!SvREADONLY(TOPs) && SvIOK_notUV(TOPs) && !SvNOK(TOPs) && !SvPOK(TOPs)
417 && SvIVX(TOPs) != IV_MAX)
55497cff 418 {
45977657 419 SvIV_set(TOPs, SvIVX(TOPs) + 1);
55497cff 420 SvFLAGS(TOPs) &= ~(SVp_NOK|SVp_POK);
748a9306 421 }
28e5dec8 422 else /* Do all the PERL_PRESERVE_IVUV conditionals in sv_inc */
748a9306 423 sv_inc(TOPs);
a0d0e21e
LW
424 SvSETMAGIC(TOPs);
425 return NORMAL;
426}
427
428PP(pp_or)
429{
97aff369 430 dVAR; dSP;
a0d0e21e
LW
431 if (SvTRUE(TOPs))
432 RETURN;
433 else {
c960fc3b
SP
434 if (PL_op->op_type == OP_OR)
435 --SP;
a0d0e21e
LW
436 RETURNOP(cLOGOP->op_other);
437 }
438}
439
25a55bd7 440PP(pp_defined)
c963b151 441{
97aff369 442 dVAR; dSP;
6136c704
AL
443 register SV* sv;
444 bool defined;
25a55bd7 445 const int op_type = PL_op->op_type;
ea5195b7 446 const bool is_dor = (op_type == OP_DOR || op_type == OP_DORASSIGN);
c963b151 447
6136c704 448 if (is_dor) {
25a55bd7
SP
449 sv = TOPs;
450 if (!sv || !SvANY(sv)) {
2bd49cfc
NC
451 if (op_type == OP_DOR)
452 --SP;
25a55bd7
SP
453 RETURNOP(cLOGOP->op_other);
454 }
b7c44293
RGS
455 }
456 else {
457 /* OP_DEFINED */
25a55bd7
SP
458 sv = POPs;
459 if (!sv || !SvANY(sv))
460 RETPUSHNO;
b7c44293 461 }
25a55bd7 462
6136c704 463 defined = FALSE;
c963b151
BD
464 switch (SvTYPE(sv)) {
465 case SVt_PVAV:
466 if (AvMAX(sv) >= 0 || SvGMAGICAL(sv) || (SvRMAGICAL(sv) && mg_find(sv, PERL_MAGIC_tied)))
25a55bd7 467 defined = TRUE;
c963b151
BD
468 break;
469 case SVt_PVHV:
470 if (HvARRAY(sv) || SvGMAGICAL(sv) || (SvRMAGICAL(sv) && mg_find(sv, PERL_MAGIC_tied)))
25a55bd7 471 defined = TRUE;
c963b151
BD
472 break;
473 case SVt_PVCV:
474 if (CvROOT(sv) || CvXSUB(sv))
25a55bd7 475 defined = TRUE;
c963b151
BD
476 break;
477 default:
5b295bef 478 SvGETMAGIC(sv);
c963b151 479 if (SvOK(sv))
25a55bd7 480 defined = TRUE;
6136c704 481 break;
c963b151 482 }
6136c704
AL
483
484 if (is_dor) {
c960fc3b
SP
485 if(defined)
486 RETURN;
487 if(op_type == OP_DOR)
488 --SP;
25a55bd7 489 RETURNOP(cLOGOP->op_other);
25a55bd7 490 }
d9aa96a4
SP
491 /* assuming OP_DEFINED */
492 if(defined)
493 RETPUSHYES;
494 RETPUSHNO;
c963b151
BD
495}
496
a0d0e21e
LW
497PP(pp_add)
498{
800401ee
JH
499 dVAR; dSP; dATARGET; bool useleft; SV *svl, *svr;
500 tryAMAGICbin(add,opASSIGN);
501 svl = sv_2num(TOPm1s);
502 svr = sv_2num(TOPs);
503 useleft = USE_LEFT(svl);
28e5dec8
JH
504#ifdef PERL_PRESERVE_IVUV
505 /* We must see if we can perform the addition with integers if possible,
506 as the integer code detects overflow while the NV code doesn't.
507 If either argument hasn't had a numeric conversion yet attempt to get
508 the IV. It's important to do this now, rather than just assuming that
509 it's not IOK as a PV of "9223372036854775806" may not take well to NV
510 addition, and an SV which is NOK, NV=6.0 ought to be coerced to
511 integer in case the second argument is IV=9223372036854775806
512 We can (now) rely on sv_2iv to do the right thing, only setting the
513 public IOK flag if the value in the NV (or PV) slot is truly integer.
514
515 A side effect is that this also aggressively prefers integer maths over
7dca457a
NC
516 fp maths for integer values.
517
a00b5bd3 518 How to detect overflow?
7dca457a
NC
519
520 C 99 section 6.2.6.1 says
521
522 The range of nonnegative values of a signed integer type is a subrange
523 of the corresponding unsigned integer type, and the representation of
524 the same value in each type is the same. A computation involving
525 unsigned operands can never overflow, because a result that cannot be
526 represented by the resulting unsigned integer type is reduced modulo
527 the number that is one greater than the largest value that can be
528 represented by the resulting type.
529
530 (the 9th paragraph)
531
532 which I read as "unsigned ints wrap."
533
534 signed integer overflow seems to be classed as "exception condition"
535
536 If an exceptional condition occurs during the evaluation of an
537 expression (that is, if the result is not mathematically defined or not
538 in the range of representable values for its type), the behavior is
539 undefined.
540
541 (6.5, the 5th paragraph)
542
543 I had assumed that on 2s complement machines signed arithmetic would
544 wrap, hence coded pp_add and pp_subtract on the assumption that
545 everything perl builds on would be happy. After much wailing and
546 gnashing of teeth it would seem that irix64 knows its ANSI spec well,
547 knows that it doesn't need to, and doesn't. Bah. Anyway, the all-
548 unsigned code below is actually shorter than the old code. :-)
549 */
550
800401ee
JH
551 SvIV_please(svr);
552 if (SvIOK(svr)) {
28e5dec8
JH
553 /* Unless the left argument is integer in range we are going to have to
554 use NV maths. Hence only attempt to coerce the right argument if
555 we know the left is integer. */
9c5ffd7c
JH
556 register UV auv = 0;
557 bool auvok = FALSE;
7dca457a
NC
558 bool a_valid = 0;
559
28e5dec8 560 if (!useleft) {
7dca457a
NC
561 auv = 0;
562 a_valid = auvok = 1;
563 /* left operand is undef, treat as zero. + 0 is identity,
564 Could SETi or SETu right now, but space optimise by not adding
565 lots of code to speed up what is probably a rarish case. */
566 } else {
567 /* Left operand is defined, so is it IV? */
800401ee
JH
568 SvIV_please(svl);
569 if (SvIOK(svl)) {
570 if ((auvok = SvUOK(svl)))
571 auv = SvUVX(svl);
7dca457a 572 else {
800401ee 573 register const IV aiv = SvIVX(svl);
7dca457a
NC
574 if (aiv >= 0) {
575 auv = aiv;
576 auvok = 1; /* Now acting as a sign flag. */
577 } else { /* 2s complement assumption for IV_MIN */
578 auv = (UV)-aiv;
579 }
580 }
581 a_valid = 1;
28e5dec8
JH
582 }
583 }
7dca457a
NC
584 if (a_valid) {
585 bool result_good = 0;
586 UV result;
587 register UV buv;
800401ee 588 bool buvok = SvUOK(svr);
a00b5bd3 589
7dca457a 590 if (buvok)
800401ee 591 buv = SvUVX(svr);
7dca457a 592 else {
800401ee 593 register const IV biv = SvIVX(svr);
7dca457a
NC
594 if (biv >= 0) {
595 buv = biv;
596 buvok = 1;
597 } else
598 buv = (UV)-biv;
599 }
600 /* ?uvok if value is >= 0. basically, flagged as UV if it's +ve,
602f51c4 601 else "IV" now, independent of how it came in.
7dca457a
NC
602 if a, b represents positive, A, B negative, a maps to -A etc
603 a + b => (a + b)
604 A + b => -(a - b)
605 a + B => (a - b)
606 A + B => -(a + b)
607 all UV maths. negate result if A negative.
608 add if signs same, subtract if signs differ. */
609
610 if (auvok ^ buvok) {
611 /* Signs differ. */
612 if (auv >= buv) {
613 result = auv - buv;
614 /* Must get smaller */
615 if (result <= auv)
616 result_good = 1;
617 } else {
618 result = buv - auv;
619 if (result <= buv) {
620 /* result really should be -(auv-buv). as its negation
621 of true value, need to swap our result flag */
622 auvok = !auvok;
623 result_good = 1;
28e5dec8
JH
624 }
625 }
7dca457a
NC
626 } else {
627 /* Signs same */
628 result = auv + buv;
629 if (result >= auv)
630 result_good = 1;
631 }
632 if (result_good) {
633 SP--;
634 if (auvok)
28e5dec8 635 SETu( result );
7dca457a
NC
636 else {
637 /* Negate result */
638 if (result <= (UV)IV_MIN)
639 SETi( -(IV)result );
640 else {
641 /* result valid, but out of range for IV. */
642 SETn( -(NV)result );
28e5dec8
JH
643 }
644 }
7dca457a
NC
645 RETURN;
646 } /* Overflow, drop through to NVs. */
28e5dec8
JH
647 }
648 }
649#endif
a0d0e21e 650 {
4efa5a16
RD
651 NV value = SvNV(svr);
652 (void)POPs;
28e5dec8
JH
653 if (!useleft) {
654 /* left operand is undef, treat as zero. + 0.0 is identity. */
655 SETn(value);
656 RETURN;
657 }
4efa5a16 658 SETn( value + SvNV(svl) );
28e5dec8 659 RETURN;
a0d0e21e
LW
660 }
661}
662
663PP(pp_aelemfast)
664{
97aff369 665 dVAR; dSP;
c445ea15 666 AV * const av = PL_op->op_flags & OPf_SPECIAL ?
6a077020 667 (AV*)PAD_SV(PL_op->op_targ) : GvAV(cGVOP_gv);
a3b680e6 668 const U32 lval = PL_op->op_flags & OPf_MOD;
0bd48802 669 SV** const svp = av_fetch(av, PL_op->op_private, lval);
3280af22 670 SV *sv = (svp ? *svp : &PL_sv_undef);
6ff81951 671 EXTEND(SP, 1);
be6c24e0
GS
672 if (!lval && SvGMAGICAL(sv)) /* see note in pp_helem() */
673 sv = sv_mortalcopy(sv);
674 PUSHs(sv);
a0d0e21e
LW
675 RETURN;
676}
677
678PP(pp_join)
679{
97aff369 680 dVAR; dSP; dMARK; dTARGET;
a0d0e21e
LW
681 MARK++;
682 do_join(TARG, *MARK, MARK, SP);
683 SP = MARK;
684 SETs(TARG);
685 RETURN;
686}
687
688PP(pp_pushre)
689{
97aff369 690 dVAR; dSP;
44a8e56a
PP
691#ifdef DEBUGGING
692 /*
693 * We ass_u_me that LvTARGOFF() comes first, and that two STRLENs
694 * will be enough to hold an OP*.
695 */
c4420975 696 SV* const sv = sv_newmortal();
44a8e56a
PP
697 sv_upgrade(sv, SVt_PVLV);
698 LvTYPE(sv) = '/';
533c011a 699 Copy(&PL_op, &LvTARGOFF(sv), 1, OP*);
44a8e56a
PP
700 XPUSHs(sv);
701#else
6b88bc9c 702 XPUSHs((SV*)PL_op);
44a8e56a 703#endif
a0d0e21e
LW
704 RETURN;
705}
706
707/* Oversized hot code. */
708
709PP(pp_print)
710{
27da23d5 711 dVAR; dSP; dMARK; dORIGMARK;
a0d0e21e 712 IO *io;
760ac839 713 register PerlIO *fp;
236988e4 714 MAGIC *mg;
0bd48802 715 GV * const gv = (PL_op->op_flags & OPf_STACKED) ? (GV*)*++MARK : PL_defoutgv;
5b468f54
AMS
716
717 if (gv && (io = GvIO(gv))
718 && (mg = SvTIED_mg((SV*)io, PERL_MAGIC_tiedscalar)))
719 {
01bb7c6d 720 had_magic:
68dc0745 721 if (MARK == ORIGMARK) {
1c846c1f 722 /* If using default handle then we need to make space to
a60c0954
NIS
723 * pass object as 1st arg, so move other args up ...
724 */
4352c267 725 MEXTEND(SP, 1);
68dc0745
PP
726 ++MARK;
727 Move(MARK, MARK + 1, (SP - MARK) + 1, SV*);
728 ++SP;
729 }
730 PUSHMARK(MARK - 1);
5b468f54 731 *MARK = SvTIED_obj((SV*)io, mg);
68dc0745 732 PUTBACK;
236988e4 733 ENTER;
864dbfa3 734 call_method("PRINT", G_SCALAR);
236988e4
PP
735 LEAVE;
736 SPAGAIN;
68dc0745
PP
737 MARK = ORIGMARK + 1;
738 *MARK = *SP;
739 SP = MARK;
236988e4
PP
740 RETURN;
741 }
a0d0e21e 742 if (!(io = GvIO(gv))) {
5b468f54
AMS
743 if ((GvEGV(gv)) && (io = GvIO(GvEGV(gv)))
744 && (mg = SvTIED_mg((SV*)io, PERL_MAGIC_tiedscalar)))
01bb7c6d 745 goto had_magic;
2dd78f96
JH
746 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
747 report_evil_fh(gv, io, PL_op->op_type);
93189314 748 SETERRNO(EBADF,RMS_IFI);
a0d0e21e
LW
749 goto just_say_no;
750 }
751 else if (!(fp = IoOFP(io))) {
599cee73 752 if (ckWARN2(WARN_CLOSED, WARN_IO)) {
4c80c0b2
NC
753 if (IoIFP(io))
754 report_evil_fh(gv, io, OP_phoney_INPUT_ONLY);
2dd78f96 755 else if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
bc37a18f 756 report_evil_fh(gv, io, PL_op->op_type);
a0d0e21e 757 }
93189314 758 SETERRNO(EBADF,IoIFP(io)?RMS_FAC:RMS_IFI);
a0d0e21e
LW
759 goto just_say_no;
760 }
761 else {
762 MARK++;
7889fe52 763 if (PL_ofs_sv && SvOK(PL_ofs_sv)) {
a0d0e21e
LW
764 while (MARK <= SP) {
765 if (!do_print(*MARK, fp))
766 break;
767 MARK++;
768 if (MARK <= SP) {
7889fe52 769 if (!do_print(PL_ofs_sv, fp)) { /* $, */
a0d0e21e
LW
770 MARK--;
771 break;
772 }
773 }
774 }
775 }
776 else {
777 while (MARK <= SP) {
778 if (!do_print(*MARK, fp))
779 break;
780 MARK++;
781 }
782 }
783 if (MARK <= SP)
784 goto just_say_no;
785 else {
cfc4a7da
GA
786 if (PL_op->op_type == OP_SAY) {
787 if (PerlIO_write(fp, "\n", 1) == 0 || PerlIO_error(fp))
788 goto just_say_no;
789 }
790 else if (PL_ors_sv && SvOK(PL_ors_sv))
7889fe52 791 if (!do_print(PL_ors_sv, fp)) /* $\ */
a0d0e21e
LW
792 goto just_say_no;
793
794 if (IoFLAGS(io) & IOf_FLUSH)
760ac839 795 if (PerlIO_flush(fp) == EOF)
a0d0e21e
LW
796 goto just_say_no;
797 }
798 }
799 SP = ORIGMARK;
e52fd6f4 800 XPUSHs(&PL_sv_yes);
a0d0e21e
LW
801 RETURN;
802
803 just_say_no:
804 SP = ORIGMARK;
e52fd6f4 805 XPUSHs(&PL_sv_undef);
a0d0e21e
LW
806 RETURN;
807}
808
809PP(pp_rv2av)
810{
97aff369 811 dVAR; dSP; dTOPss;
cde874ca 812 const I32 gimme = GIMME_V;
17ab7946
NC
813 static const char return_array_to_lvalue_scalar[] = "Can't return array to lvalue scalar context";
814 static const char return_hash_to_lvalue_scalar[] = "Can't return hash to lvalue scalar context";
815 static const char an_array[] = "an ARRAY";
816 static const char a_hash[] = "a HASH";
817 const bool is_pp_rv2av = PL_op->op_type == OP_RV2AV;
d83b45b8 818 const svtype type = is_pp_rv2av ? SVt_PVAV : SVt_PVHV;
a0d0e21e
LW
819
820 if (SvROK(sv)) {
821 wasref:
17ab7946 822 tryAMAGICunDEREF_var(is_pp_rv2av ? to_av_amg : to_hv_amg);
f5284f61 823
17ab7946
NC
824 sv = SvRV(sv);
825 if (SvTYPE(sv) != type)
826 DIE(aTHX_ "Not %s reference", is_pp_rv2av ? an_array : a_hash);
533c011a 827 if (PL_op->op_flags & OPf_REF) {
17ab7946 828 SETs(sv);
a0d0e21e
LW
829 RETURN;
830 }
78f9721b 831 else if (LVRET) {
cde874ca 832 if (gimme != G_ARRAY)
17ab7946
NC
833 Perl_croak(aTHX_ is_pp_rv2av ? return_array_to_lvalue_scalar
834 : return_hash_to_lvalue_scalar);
835 SETs(sv);
78f9721b
SM
836 RETURN;
837 }
82d03984
RGS
838 else if (PL_op->op_flags & OPf_MOD
839 && PL_op->op_private & OPpLVAL_INTRO)
840 Perl_croak(aTHX_ PL_no_localize_ref);
a0d0e21e
LW
841 }
842 else {
17ab7946 843 if (SvTYPE(sv) == type) {
533c011a 844 if (PL_op->op_flags & OPf_REF) {
17ab7946 845 SETs(sv);
a0d0e21e
LW
846 RETURN;
847 }
78f9721b 848 else if (LVRET) {
cde874ca 849 if (gimme != G_ARRAY)
17ab7946
NC
850 Perl_croak(aTHX_
851 is_pp_rv2av ? return_array_to_lvalue_scalar
852 : return_hash_to_lvalue_scalar);
853 SETs(sv);
78f9721b
SM
854 RETURN;
855 }
a0d0e21e
LW
856 }
857 else {
67955e0c 858 GV *gv;
1c846c1f 859
a0d0e21e
LW
860 if (SvTYPE(sv) != SVt_PVGV) {
861 if (SvGMAGICAL(sv)) {
862 mg_get(sv);
863 if (SvROK(sv))
864 goto wasref;
865 }
dc3c76f8
NC
866 gv = Perl_softref2xv(aTHX_ sv, is_pp_rv2av ? an_array : a_hash,
867 type, &sp);
868 if (!gv)
869 RETURN;
35cd451c
GS
870 }
871 else {
67955e0c 872 gv = (GV*)sv;
a0d0e21e 873 }
17ab7946 874 sv = is_pp_rv2av ? (SV*)GvAVn(gv) : (SV*)GvHVn(gv);
533c011a 875 if (PL_op->op_private & OPpLVAL_INTRO)
17ab7946 876 sv = is_pp_rv2av ? (SV*)save_ary(gv) : (SV*)save_hash(gv);
533c011a 877 if (PL_op->op_flags & OPf_REF) {
17ab7946 878 SETs(sv);
a0d0e21e
LW
879 RETURN;
880 }
78f9721b 881 else if (LVRET) {
cde874ca 882 if (gimme != G_ARRAY)
17ab7946
NC
883 Perl_croak(aTHX_
884 is_pp_rv2av ? return_array_to_lvalue_scalar
885 : return_hash_to_lvalue_scalar);
886 SETs(sv);
78f9721b
SM
887 RETURN;
888 }
a0d0e21e
LW
889 }
890 }
891
17ab7946
NC
892 if (is_pp_rv2av) {
893 AV *const av = (AV*)sv;
894 /* The guts of pp_rv2av, with no intenting change to preserve history
895 (until such time as we get tools that can do blame annotation across
896 whitespace changes. */
cde874ca 897 if (gimme == G_ARRAY) {
a3b680e6 898 const I32 maxarg = AvFILL(av) + 1;
c2444246 899 (void)POPs; /* XXXX May be optimized away? */
1c846c1f 900 EXTEND(SP, maxarg);
93965878 901 if (SvRMAGICAL(av)) {
1c846c1f 902 U32 i;
eb160463 903 for (i=0; i < (U32)maxarg; i++) {
0bcc34c2 904 SV ** const svp = av_fetch(av, i, FALSE);
547d1dd8
HS
905 /* See note in pp_helem, and bug id #27839 */
906 SP[i+1] = svp
907 ? SvGMAGICAL(*svp) ? sv_mortalcopy(*svp) : *svp
908 : &PL_sv_undef;
93965878 909 }
1c846c1f 910 }
93965878
NIS
911 else {
912 Copy(AvARRAY(av), SP+1, maxarg, SV*);
913 }
a0d0e21e
LW
914 SP += maxarg;
915 }
cde874ca 916 else if (gimme == G_SCALAR) {
a0d0e21e 917 dTARGET;
a3b680e6 918 const I32 maxarg = AvFILL(av) + 1;
f5284f61 919 SETi(maxarg);
a0d0e21e 920 }
17ab7946
NC
921 } else {
922 /* The guts of pp_rv2hv */
be85d344 923 if (gimme == G_ARRAY) { /* array wanted */
17ab7946 924 *PL_stack_sp = sv;
cea2e8a9 925 return do_kv();
a0d0e21e 926 }
be85d344 927 else if (gimme == G_SCALAR) {
a0d0e21e 928 dTARGET;
17ab7946 929 TARG = Perl_hv_scalar(aTHX_ (HV*)sv);
5e17dd7d 930 SPAGAIN;
a0d0e21e 931 SETTARG;
a0d0e21e 932 }
17ab7946 933 }
be85d344 934 RETURN;
a0d0e21e
LW
935}
936
10c8fecd
GS
937STATIC void
938S_do_oddball(pTHX_ HV *hash, SV **relem, SV **firstrelem)
939{
97aff369 940 dVAR;
10c8fecd
GS
941 if (*relem) {
942 SV *tmpstr;
b464bac0 943 const HE *didstore;
6d822dc4
MS
944
945 if (ckWARN(WARN_MISC)) {
a3b680e6 946 const char *err;
10c8fecd
GS
947 if (relem == firstrelem &&
948 SvROK(*relem) &&
949 (SvTYPE(SvRV(*relem)) == SVt_PVAV ||
950 SvTYPE(SvRV(*relem)) == SVt_PVHV))
951 {
a3b680e6 952 err = "Reference found where even-sized list expected";
10c8fecd
GS
953 }
954 else
a3b680e6
AL
955 err = "Odd number of elements in hash assignment";
956 Perl_warner(aTHX_ packWARN(WARN_MISC), err);
10c8fecd 957 }
6d822dc4 958
561b68a9 959 tmpstr = newSV(0);
6d822dc4
MS
960 didstore = hv_store_ent(hash,*relem,tmpstr,0);
961 if (SvMAGICAL(hash)) {
962 if (SvSMAGICAL(tmpstr))
963 mg_set(tmpstr);
964 if (!didstore)
965 sv_2mortal(tmpstr);
966 }
967 TAINT_NOT;
10c8fecd
GS
968 }
969}
970
a0d0e21e
LW
971PP(pp_aassign)
972{
27da23d5 973 dVAR; dSP;
3280af22
NIS
974 SV **lastlelem = PL_stack_sp;
975 SV **lastrelem = PL_stack_base + POPMARK;
976 SV **firstrelem = PL_stack_base + POPMARK + 1;
a0d0e21e
LW
977 SV **firstlelem = lastrelem + 1;
978
979 register SV **relem;
980 register SV **lelem;
981
982 register SV *sv;
983 register AV *ary;
984
54310121 985 I32 gimme;
a0d0e21e
LW
986 HV *hash;
987 I32 i;
988 int magic;
ca65944e 989 int duplicates = 0;
cbbf8932 990 SV **firsthashrelem = NULL; /* "= 0" keeps gcc 2.95 quiet */
5637b936 991
3280af22 992 PL_delaymagic = DM_DELAY; /* catch simultaneous items */
ca65944e 993 gimme = GIMME_V;
a0d0e21e
LW
994
995 /* If there's a common identifier on both sides we have to take
996 * special care that assigning the identifier on the left doesn't
997 * clobber a value on the right that's used later in the list.
998 */
10c8fecd 999 if (PL_op->op_private & (OPpASSIGN_COMMON)) {
cc5e57d2 1000 EXTEND_MORTAL(lastrelem - firstrelem + 1);
10c8fecd 1001 for (relem = firstrelem; relem <= lastrelem; relem++) {
155aba94 1002 if ((sv = *relem)) {
a1f49e72 1003 TAINT_NOT; /* Each item is independent */
10c8fecd 1004 *relem = sv_mortalcopy(sv);
a1f49e72 1005 }
10c8fecd 1006 }
a0d0e21e
LW
1007 }
1008
1009 relem = firstrelem;
1010 lelem = firstlelem;
4608196e
RGS
1011 ary = NULL;
1012 hash = NULL;
10c8fecd 1013
a0d0e21e 1014 while (lelem <= lastlelem) {
bbce6d69 1015 TAINT_NOT; /* Each item stands on its own, taintwise. */
a0d0e21e
LW
1016 sv = *lelem++;
1017 switch (SvTYPE(sv)) {
1018 case SVt_PVAV:
1019 ary = (AV*)sv;
748a9306 1020 magic = SvMAGICAL(ary) != 0;
a0d0e21e 1021 av_clear(ary);
7e42bd57 1022 av_extend(ary, lastrelem - relem);
a0d0e21e
LW
1023 i = 0;
1024 while (relem <= lastrelem) { /* gobble up all the rest */
5117ca91 1025 SV **didstore;
a0d0e21e 1026 assert(*relem);
f2b990bf 1027 sv = newSVsv(*relem);
a0d0e21e 1028 *(relem++) = sv;
5117ca91
GS
1029 didstore = av_store(ary,i++,sv);
1030 if (magic) {
fb73857a
PP
1031 if (SvSMAGICAL(sv))
1032 mg_set(sv);
5117ca91 1033 if (!didstore)
8127e0e3 1034 sv_2mortal(sv);
5117ca91 1035 }
bbce6d69 1036 TAINT_NOT;
a0d0e21e 1037 }
934dcd01
RD
1038 if (PL_delaymagic & DM_ARRAY)
1039 SvSETMAGIC((SV*)ary);
a0d0e21e 1040 break;
10c8fecd 1041 case SVt_PVHV: { /* normal hash */
a0d0e21e
LW
1042 SV *tmpstr;
1043
1044 hash = (HV*)sv;
748a9306 1045 magic = SvMAGICAL(hash) != 0;
a0d0e21e 1046 hv_clear(hash);
ca65944e 1047 firsthashrelem = relem;
a0d0e21e
LW
1048
1049 while (relem < lastrelem) { /* gobble up all the rest */
5117ca91 1050 HE *didstore;
6136c704
AL
1051 sv = *relem ? *relem : &PL_sv_no;
1052 relem++;
561b68a9 1053 tmpstr = newSV(0);
a0d0e21e
LW
1054 if (*relem)
1055 sv_setsv(tmpstr,*relem); /* value */
1056 *(relem++) = tmpstr;
ca65944e
RGS
1057 if (gimme != G_VOID && hv_exists_ent(hash, sv, 0))
1058 /* key overwrites an existing entry */
1059 duplicates += 2;
5117ca91
GS
1060 didstore = hv_store_ent(hash,sv,tmpstr,0);
1061 if (magic) {
fb73857a
PP
1062 if (SvSMAGICAL(tmpstr))
1063 mg_set(tmpstr);
5117ca91 1064 if (!didstore)
8127e0e3 1065 sv_2mortal(tmpstr);
5117ca91 1066 }
bbce6d69 1067 TAINT_NOT;
8e07c86e 1068 }
6a0deba8 1069 if (relem == lastrelem) {
10c8fecd 1070 do_oddball(hash, relem, firstrelem);
6a0deba8 1071 relem++;
1930e939 1072 }
a0d0e21e
LW
1073 }
1074 break;
1075 default:
6fc92669
GS
1076 if (SvIMMORTAL(sv)) {
1077 if (relem <= lastrelem)
1078 relem++;
1079 break;
a0d0e21e
LW
1080 }
1081 if (relem <= lastrelem) {
1082 sv_setsv(sv, *relem);
1083 *(relem++) = sv;
1084 }
1085 else
3280af22 1086 sv_setsv(sv, &PL_sv_undef);
a0d0e21e
LW
1087 SvSETMAGIC(sv);
1088 break;
1089 }
1090 }
3280af22
NIS
1091 if (PL_delaymagic & ~DM_DELAY) {
1092 if (PL_delaymagic & DM_UID) {
a0d0e21e 1093#ifdef HAS_SETRESUID
fb934a90
RD
1094 (void)setresuid((PL_delaymagic & DM_RUID) ? PL_uid : (Uid_t)-1,
1095 (PL_delaymagic & DM_EUID) ? PL_euid : (Uid_t)-1,
1096 (Uid_t)-1);
56febc5e
AD
1097#else
1098# ifdef HAS_SETREUID
fb934a90
RD
1099 (void)setreuid((PL_delaymagic & DM_RUID) ? PL_uid : (Uid_t)-1,
1100 (PL_delaymagic & DM_EUID) ? PL_euid : (Uid_t)-1);
56febc5e
AD
1101# else
1102# ifdef HAS_SETRUID
b28d0864
NIS
1103 if ((PL_delaymagic & DM_UID) == DM_RUID) {
1104 (void)setruid(PL_uid);
1105 PL_delaymagic &= ~DM_RUID;
a0d0e21e 1106 }
56febc5e
AD
1107# endif /* HAS_SETRUID */
1108# ifdef HAS_SETEUID
b28d0864 1109 if ((PL_delaymagic & DM_UID) == DM_EUID) {
fb934a90 1110 (void)seteuid(PL_euid);
b28d0864 1111 PL_delaymagic &= ~DM_EUID;
a0d0e21e 1112 }
56febc5e 1113# endif /* HAS_SETEUID */
b28d0864
NIS
1114 if (PL_delaymagic & DM_UID) {
1115 if (PL_uid != PL_euid)
cea2e8a9 1116 DIE(aTHX_ "No setreuid available");
b28d0864 1117 (void)PerlProc_setuid(PL_uid);
a0d0e21e 1118 }
56febc5e
AD
1119# endif /* HAS_SETREUID */
1120#endif /* HAS_SETRESUID */
d8eceb89
JH
1121 PL_uid = PerlProc_getuid();
1122 PL_euid = PerlProc_geteuid();
a0d0e21e 1123 }
3280af22 1124 if (PL_delaymagic & DM_GID) {
a0d0e21e 1125#ifdef HAS_SETRESGID
fb934a90
RD
1126 (void)setresgid((PL_delaymagic & DM_RGID) ? PL_gid : (Gid_t)-1,
1127 (PL_delaymagic & DM_EGID) ? PL_egid : (Gid_t)-1,
1128 (Gid_t)-1);
56febc5e
AD
1129#else
1130# ifdef HAS_SETREGID
fb934a90
RD
1131 (void)setregid((PL_delaymagic & DM_RGID) ? PL_gid : (Gid_t)-1,
1132 (PL_delaymagic & DM_EGID) ? PL_egid : (Gid_t)-1);
56febc5e
AD
1133# else
1134# ifdef HAS_SETRGID
b28d0864
NIS
1135 if ((PL_delaymagic & DM_GID) == DM_RGID) {
1136 (void)setrgid(PL_gid);
1137 PL_delaymagic &= ~DM_RGID;
a0d0e21e 1138 }
56febc5e
AD
1139# endif /* HAS_SETRGID */
1140# ifdef HAS_SETEGID
b28d0864 1141 if ((PL_delaymagic & DM_GID) == DM_EGID) {
fb934a90 1142 (void)setegid(PL_egid);
b28d0864 1143 PL_delaymagic &= ~DM_EGID;
a0d0e21e 1144 }
56febc5e 1145# endif /* HAS_SETEGID */
b28d0864
NIS
1146 if (PL_delaymagic & DM_GID) {
1147 if (PL_gid != PL_egid)
cea2e8a9 1148 DIE(aTHX_ "No setregid available");
b28d0864 1149 (void)PerlProc_setgid(PL_gid);
a0d0e21e 1150 }
56febc5e
AD
1151# endif /* HAS_SETREGID */
1152#endif /* HAS_SETRESGID */
d8eceb89
JH
1153 PL_gid = PerlProc_getgid();
1154 PL_egid = PerlProc_getegid();
a0d0e21e 1155 }
3280af22 1156 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
a0d0e21e 1157 }
3280af22 1158 PL_delaymagic = 0;
54310121 1159
54310121
PP
1160 if (gimme == G_VOID)
1161 SP = firstrelem - 1;
1162 else if (gimme == G_SCALAR) {
1163 dTARGET;
1164 SP = firstrelem;
ca65944e 1165 SETi(lastrelem - firstrelem + 1 - duplicates);
54310121
PP
1166 }
1167 else {
ca65944e 1168 if (ary)
a0d0e21e 1169 SP = lastrelem;
ca65944e
RGS
1170 else if (hash) {
1171 if (duplicates) {
1172 /* Removes from the stack the entries which ended up as
1173 * duplicated keys in the hash (fix for [perl #24380]) */
1174 Move(firsthashrelem + duplicates,
1175 firsthashrelem, duplicates, SV**);
1176 lastrelem -= duplicates;
1177 }
1178 SP = lastrelem;
1179 }
a0d0e21e
LW
1180 else
1181 SP = firstrelem + (lastlelem - firstlelem);
0c8c7a05 1182 lelem = firstlelem + (relem - firstrelem);
5f05dabc 1183 while (relem <= SP)
3280af22 1184 *relem++ = (lelem <= lastlelem) ? *lelem++ : &PL_sv_undef;
a0d0e21e 1185 }
08aeb9f7 1186
54310121 1187 RETURN;
a0d0e21e
LW
1188}
1189
8782bef2
GB
1190PP(pp_qr)
1191{
97aff369 1192 dVAR; dSP;
c4420975 1193 register PMOP * const pm = cPMOP;
fe578d7f 1194 REGEXP * rx = PM_GETRE(pm);
49d7dfbc 1195 SV * const pkg = CALLREG_PACKAGE(rx);
c4420975 1196 SV * const rv = sv_newmortal();
fe578d7f
AB
1197 SV * const sv = newSVrv(rv, SvPV_nolen(pkg));
1198 if (rx->extflags & RXf_TAINTED)
e08e52cf 1199 SvTAINTED_on(rv);
fe578d7f 1200 sv_magic(sv,(SV*)ReREFCNT_inc(rx), PERL_MAGIC_qr,0,0);
c8c13c22 1201 XPUSHs(rv);
1202 RETURN;
8782bef2
GB
1203}
1204
a0d0e21e
LW
1205PP(pp_match)
1206{
97aff369 1207 dVAR; dSP; dTARG;
a0d0e21e 1208 register PMOP *pm = cPMOP;
d65afb4b 1209 PMOP *dynpm = pm;
0d46e09a
SP
1210 register const char *t;
1211 register const char *s;
5c144d81 1212 const char *strend;
a0d0e21e 1213 I32 global;
f722798b 1214 I32 r_flags = REXEC_CHECKED;
5c144d81 1215 const char *truebase; /* Start of string */
aaa362c4 1216 register REGEXP *rx = PM_GETRE(pm);
b3eb6a9b 1217 bool rxtainted;
a3b680e6 1218 const I32 gimme = GIMME;
a0d0e21e 1219 STRLEN len;
748a9306 1220 I32 minmatch = 0;
a3b680e6 1221 const I32 oldsave = PL_savestack_ix;
f86702cc 1222 I32 update_minmatch = 1;
e60df1fa 1223 I32 had_zerolen = 0;
58e23c8d 1224 U32 gpos = 0;
a0d0e21e 1225
533c011a 1226 if (PL_op->op_flags & OPf_STACKED)
a0d0e21e 1227 TARG = POPs;
59f00321
RGS
1228 else if (PL_op->op_private & OPpTARGET_MY)
1229 GETTARGET;
a0d0e21e 1230 else {
54b9620d 1231 TARG = DEFSV;
a0d0e21e
LW
1232 EXTEND(SP,1);
1233 }
d9f424b2 1234
c277df42 1235 PUTBACK; /* EVAL blocks need stack_sp. */
5c144d81 1236 s = SvPV_const(TARG, len);
a0d0e21e 1237 if (!s)
2269b42e 1238 DIE(aTHX_ "panic: pp_match");
890ce7af 1239 strend = s + len;
c737faaf 1240 rxtainted = ((rx->extflags & RXf_TAINTED) ||
3280af22 1241 (PL_tainted && (pm->op_pmflags & PMf_RETAINT)));
9212bbba 1242 TAINT_NOT;
a0d0e21e 1243
a30b2f1f 1244 RX_MATCH_UTF8_set(rx, DO_UTF8(TARG));
d9f424b2 1245
d65afb4b 1246 /* PMdf_USED is set after a ?? matches once */
c737faaf
YO
1247 if (
1248#ifdef USE_ITHREADS
1249 SvREADONLY(PL_regex_pad[pm->op_pmoffset])
1250#else
1251 pm->op_pmflags & PMf_USED
1252#endif
1253 ) {
c277df42 1254 failure:
a0d0e21e
LW
1255 if (gimme == G_ARRAY)
1256 RETURN;
1257 RETPUSHNO;
1258 }
1259
c737faaf
YO
1260
1261
d65afb4b 1262 /* empty pattern special-cased to use last successful pattern if possible */
3280af22
NIS
1263 if (!rx->prelen && PL_curpm) {
1264 pm = PL_curpm;
aaa362c4 1265 rx = PM_GETRE(pm);
a0d0e21e 1266 }
d65afb4b 1267
eb160463 1268 if (rx->minlen > (I32)len)
d65afb4b 1269 goto failure;
c277df42 1270
a0d0e21e 1271 truebase = t = s;
ad94a511
IZ
1272
1273 /* XXXX What part of this is needed with true \G-support? */
d65afb4b 1274 if ((global = dynpm->op_pmflags & PMf_GLOBAL)) {
f0ab9afb 1275 rx->offs[0].start = -1;
a0d0e21e 1276 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
c445ea15 1277 MAGIC* const mg = mg_find(TARG, PERL_MAGIC_regex_global);
565764a8 1278 if (mg && mg->mg_len >= 0) {
bbe252da 1279 if (!(rx->extflags & RXf_GPOS_SEEN))
f0ab9afb 1280 rx->offs[0].end = rx->offs[0].start = mg->mg_len;
bbe252da 1281 else if (rx->extflags & RXf_ANCH_GPOS) {
0ef3e39e 1282 r_flags |= REXEC_IGNOREPOS;
f0ab9afb 1283 rx->offs[0].end = rx->offs[0].start = mg->mg_len;
bbe252da 1284 } else if (rx->extflags & RXf_GPOS_FLOAT)
58e23c8d
YO
1285 gpos = mg->mg_len;
1286 else
f0ab9afb 1287 rx->offs[0].end = rx->offs[0].start = mg->mg_len;
58e23c8d 1288 minmatch = (mg->mg_flags & MGf_MINMATCH) ? rx->gofs + 1 : 0;
f86702cc 1289 update_minmatch = 0;
748a9306 1290 }
a0d0e21e
LW
1291 }
1292 }
a229a030 1293 /* XXX: comment out !global get safe $1 vars after a
62e7980d 1294 match, BUT be aware that this leads to dramatic slowdowns on
a229a030
YO
1295 /g matches against large strings. So far a solution to this problem
1296 appears to be quite tricky.
1297 Test for the unsafe vars are TODO for now. */
1298 if (( !global && rx->nparens)
cde0cee5 1299 || SvTEMP(TARG) || PL_sawampersand ||
c737faaf 1300 (rx->extflags & (RXf_EVAL_SEEN|RXf_PMf_KEEPCOPY)))
14977893 1301 r_flags |= REXEC_COPY_STR;
1c846c1f 1302 if (SvSCREAM(TARG))
22e551b9
IZ
1303 r_flags |= REXEC_SCREAM;
1304
a0d0e21e 1305play_it_again:
f0ab9afb
NC
1306 if (global && rx->offs[0].start != -1) {
1307 t = s = rx->offs[0].end + truebase - rx->gofs;
58e23c8d 1308 if ((s + rx->minlen) > strend || s < truebase)
a0d0e21e 1309 goto nope;
f86702cc 1310 if (update_minmatch++)
e60df1fa 1311 minmatch = had_zerolen;
a0d0e21e 1312 }
bbe252da
YO
1313 if (rx->extflags & RXf_USE_INTUIT &&
1314 DO_UTF8(TARG) == ((rx->extflags & RXf_UTF8) != 0)) {
5c144d81
NC
1315 /* FIXME - can PL_bostr be made const char *? */
1316 PL_bostr = (char *)truebase;
f9f4320a 1317 s = CALLREG_INTUIT_START(rx, TARG, (char *)s, (char *)strend, r_flags, NULL);
f722798b
IZ
1318
1319 if (!s)
1320 goto nope;
bbe252da 1321 if ( (rx->extflags & RXf_CHECK_ALL)
14977893 1322 && !PL_sawampersand
c737faaf 1323 && !(rx->extflags & RXf_PMf_KEEPCOPY)
bbe252da
YO
1324 && ((rx->extflags & RXf_NOSCAN)
1325 || !((rx->extflags & RXf_INTUIT_TAIL)
05b4157f
GS
1326 && (r_flags & REXEC_SCREAM)))
1327 && !SvROK(TARG)) /* Cannot trust since INTUIT cannot guess ^ */
f722798b 1328 goto yup;
a0d0e21e 1329 }
51310be1 1330 if (CALLREGEXEC(rx, (char*)s, (char *)strend, (char*)truebase, minmatch, TARG, INT2PTR(void*, (UV)gpos), r_flags))
bbce6d69 1331 {
3280af22 1332 PL_curpm = pm;
c737faaf
YO
1333 if (dynpm->op_pmflags & PMf_ONCE) {
1334#ifdef USE_ITHREADS
1335 SvREADONLY_on(PL_regex_pad[dynpm->op_pmoffset]);
1336#else
1337 dynpm->op_pmflags |= PMf_USED;
1338#endif
1339 }
a0d0e21e
LW
1340 goto gotcha;
1341 }
1342 else
1343 goto ret_no;
1344 /*NOTREACHED*/
1345
1346 gotcha:
72311751
GS
1347 if (rxtainted)
1348 RX_MATCH_TAINTED_on(rx);
1349 TAINT_IF(RX_MATCH_TAINTED(rx));
a0d0e21e 1350 if (gimme == G_ARRAY) {
a3b680e6
AL
1351 const I32 nparens = rx->nparens;
1352 I32 i = (global && !nparens) ? 1 : 0;
a0d0e21e 1353
c277df42 1354 SPAGAIN; /* EVAL blocks could move the stack. */
ffc61ed2
JH
1355 EXTEND(SP, nparens + i);
1356 EXTEND_MORTAL(nparens + i);
1357 for (i = !i; i <= nparens; i++) {
a0d0e21e 1358 PUSHs(sv_newmortal());
f0ab9afb
NC
1359 if ((rx->offs[i].start != -1) && rx->offs[i].end != -1 ) {
1360 const I32 len = rx->offs[i].end - rx->offs[i].start;
1361 s = rx->offs[i].start + truebase;
1362 if (rx->offs[i].end < 0 || rx->offs[i].start < 0 ||
290deeac
A
1363 len < 0 || len > strend - s)
1364 DIE(aTHX_ "panic: pp_match start/end pointers");
a0d0e21e 1365 sv_setpvn(*SP, s, len);
cce850e4 1366 if (DO_UTF8(TARG) && is_utf8_string((U8*)s, len))
a197cbdd 1367 SvUTF8_on(*SP);
a0d0e21e
LW
1368 }
1369 }
1370 if (global) {
d65afb4b 1371 if (dynpm->op_pmflags & PMf_CONTINUE) {
6136c704 1372 MAGIC* mg = NULL;
0af80b60
HS
1373 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG))
1374 mg = mg_find(TARG, PERL_MAGIC_regex_global);
1375 if (!mg) {
d83f0a82
NC
1376#ifdef PERL_OLD_COPY_ON_WRITE
1377 if (SvIsCOW(TARG))
1378 sv_force_normal_flags(TARG, 0);
1379#endif
1380 mg = sv_magicext(TARG, NULL, PERL_MAGIC_regex_global,
1381 &PL_vtbl_mglob, NULL, 0);
0af80b60 1382 }
f0ab9afb
NC
1383 if (rx->offs[0].start != -1) {
1384 mg->mg_len = rx->offs[0].end;
1385 if (rx->offs[0].start + rx->gofs == (UV)rx->offs[0].end)
0af80b60
HS
1386 mg->mg_flags |= MGf_MINMATCH;
1387 else
1388 mg->mg_flags &= ~MGf_MINMATCH;
1389 }
1390 }
f0ab9afb
NC
1391 had_zerolen = (rx->offs[0].start != -1
1392 && (rx->offs[0].start + rx->gofs
1393 == (UV)rx->offs[0].end));
c277df42 1394 PUTBACK; /* EVAL blocks may use stack */
cf93c79d 1395 r_flags |= REXEC_IGNOREPOS | REXEC_NOT_FIRST;
a0d0e21e
LW
1396 goto play_it_again;
1397 }
ffc61ed2 1398 else if (!nparens)
bde848c5 1399 XPUSHs(&PL_sv_yes);
4633a7c4 1400 LEAVE_SCOPE(oldsave);
a0d0e21e
LW
1401 RETURN;
1402 }
1403 else {
1404 if (global) {
cbbf8932 1405 MAGIC* mg;
a0d0e21e 1406 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG))
14befaf4 1407 mg = mg_find(TARG, PERL_MAGIC_regex_global);
cbbf8932
AL
1408 else
1409 mg = NULL;
a0d0e21e 1410 if (!mg) {
d83f0a82
NC
1411#ifdef PERL_OLD_COPY_ON_WRITE
1412 if (SvIsCOW(TARG))
1413 sv_force_normal_flags(TARG, 0);
1414#endif
1415 mg = sv_magicext(TARG, NULL, PERL_MAGIC_regex_global,
1416 &PL_vtbl_mglob, NULL, 0);
a0d0e21e 1417 }
f0ab9afb
NC
1418 if (rx->offs[0].start != -1) {
1419 mg->mg_len = rx->offs[0].end;
1420 if (rx->offs[0].start + rx->gofs == (UV)rx->offs[0].end)
748a9306
LW
1421 mg->mg_flags |= MGf_MINMATCH;
1422 else
1423 mg->mg_flags &= ~MGf_MINMATCH;
1424 }
a0d0e21e 1425 }
4633a7c4 1426 LEAVE_SCOPE(oldsave);
a0d0e21e
LW
1427 RETPUSHYES;
1428 }
1429
f722798b 1430yup: /* Confirmed by INTUIT */
72311751
GS
1431 if (rxtainted)
1432 RX_MATCH_TAINTED_on(rx);
1433 TAINT_IF(RX_MATCH_TAINTED(rx));
3280af22 1434 PL_curpm = pm;
c737faaf
YO
1435 if (dynpm->op_pmflags & PMf_ONCE) {
1436#ifdef USE_ITHREADS
1437 SvREADONLY_on(PL_regex_pad[dynpm->op_pmoffset]);
1438#else
1439 dynpm->op_pmflags |= PMf_USED;
1440#endif
1441 }
cf93c79d
IZ
1442 if (RX_MATCH_COPIED(rx))
1443 Safefree(rx->subbeg);
1444 RX_MATCH_COPIED_off(rx);
6136c704 1445 rx->subbeg = NULL;
a0d0e21e 1446 if (global) {
5c144d81
NC
1447 /* FIXME - should rx->subbeg be const char *? */
1448 rx->subbeg = (char *) truebase;
f0ab9afb 1449 rx->offs[0].start = s - truebase;
a30b2f1f 1450 if (RX_MATCH_UTF8(rx)) {
de8c5301 1451 char * const t = (char*)utf8_hop((U8*)s, rx->minlenret);
f0ab9afb 1452 rx->offs[0].end = t - truebase;
60aeb6fd
NIS
1453 }
1454 else {
f0ab9afb 1455 rx->offs[0].end = s - truebase + rx->minlenret;
60aeb6fd 1456 }
cf93c79d 1457 rx->sublen = strend - truebase;
a0d0e21e 1458 goto gotcha;
1c846c1f 1459 }
c737faaf 1460 if (PL_sawampersand || rx->extflags & RXf_PMf_KEEPCOPY) {
14977893 1461 I32 off;
f8c7b90f 1462#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
1463 if (SvIsCOW(TARG) || (SvFLAGS(TARG) & CAN_COW_MASK) == CAN_COW_FLAGS) {
1464 if (DEBUG_C_TEST) {
1465 PerlIO_printf(Perl_debug_log,
1466 "Copy on write: pp_match $& capture, type %d, truebase=%p, t=%p, difference %d\n",
6c9570dc 1467 (int) SvTYPE(TARG), (void*)truebase, (void*)t,
ed252734
NC
1468 (int)(t-truebase));
1469 }
1470 rx->saved_copy = sv_setsv_cow(rx->saved_copy, TARG);
555831ce 1471 rx->subbeg = (char *) SvPVX_const(rx->saved_copy) + (t - truebase);
ed252734
NC
1472 assert (SvPOKp(rx->saved_copy));
1473 } else
1474#endif
1475 {
14977893 1476
ed252734 1477 rx->subbeg = savepvn(t, strend - t);
f8c7b90f 1478#ifdef PERL_OLD_COPY_ON_WRITE
a0714e2c 1479 rx->saved_copy = NULL;
ed252734
NC
1480#endif
1481 }
14977893
JH
1482 rx->sublen = strend - t;
1483 RX_MATCH_COPIED_on(rx);
f0ab9afb
NC
1484 off = rx->offs[0].start = s - t;
1485 rx->offs[0].end = off + rx->minlenret;
14977893
JH
1486 }
1487 else { /* startp/endp are used by @- @+. */
f0ab9afb
NC
1488 rx->offs[0].start = s - truebase;
1489 rx->offs[0].end = s - truebase + rx->minlenret;
14977893 1490 }
cde0cee5
YO
1491 /* including rx->nparens in the below code seems highly suspicious.
1492 -dmq */
2d862feb 1493 rx->nparens = rx->lastparen = rx->lastcloseparen = 0; /* used by @-, @+, and $^N */
4633a7c4 1494 LEAVE_SCOPE(oldsave);
a0d0e21e
LW
1495 RETPUSHYES;
1496
1497nope:
a0d0e21e 1498ret_no:
d65afb4b 1499 if (global && !(dynpm->op_pmflags & PMf_CONTINUE)) {
a0d0e21e 1500 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
6136c704 1501 MAGIC* const mg = mg_find(TARG, PERL_MAGIC_regex_global);
a0d0e21e 1502 if (mg)
565764a8 1503 mg->mg_len = -1;
a0d0e21e
LW
1504 }
1505 }
4633a7c4 1506 LEAVE_SCOPE(oldsave);
a0d0e21e
LW
1507 if (gimme == G_ARRAY)
1508 RETURN;
1509 RETPUSHNO;
1510}
1511
1512OP *
864dbfa3 1513Perl_do_readline(pTHX)
a0d0e21e 1514{
27da23d5 1515 dVAR; dSP; dTARGETSTACKED;
a0d0e21e
LW
1516 register SV *sv;
1517 STRLEN tmplen = 0;
1518 STRLEN offset;
760ac839 1519 PerlIO *fp;
a3b680e6
AL
1520 register IO * const io = GvIO(PL_last_in_gv);
1521 register const I32 type = PL_op->op_type;
1522 const I32 gimme = GIMME_V;
a0d0e21e 1523
6136c704
AL
1524 if (io) {
1525 MAGIC * const mg = SvTIED_mg((SV*)io, PERL_MAGIC_tiedscalar);
1526 if (mg) {
1527 PUSHMARK(SP);
1528 XPUSHs(SvTIED_obj((SV*)io, mg));
1529 PUTBACK;
1530 ENTER;
1531 call_method("READLINE", gimme);
1532 LEAVE;
1533 SPAGAIN;
1534 if (gimme == G_SCALAR) {
1535 SV* const result = POPs;
1536 SvSetSV_nosteal(TARG, result);
1537 PUSHTARG;
1538 }
1539 RETURN;
0b7c7b4f 1540 }
e79b0511 1541 }
4608196e 1542 fp = NULL;
a0d0e21e
LW
1543 if (io) {
1544 fp = IoIFP(io);
1545 if (!fp) {
1546 if (IoFLAGS(io) & IOf_ARGV) {
1547 if (IoFLAGS(io) & IOf_START) {
a0d0e21e 1548 IoLINES(io) = 0;
3280af22 1549 if (av_len(GvAVn(PL_last_in_gv)) < 0) {
1d7c1841 1550 IoFLAGS(io) &= ~IOf_START;
4608196e 1551 do_open(PL_last_in_gv,"-",1,FALSE,O_RDONLY,0,NULL);
c69033f2 1552 sv_setpvn(GvSVn(PL_last_in_gv), "-", 1);
3280af22 1553 SvSETMAGIC(GvSV(PL_last_in_gv));
a2008d6d
GS
1554 fp = IoIFP(io);
1555 goto have_fp;
a0d0e21e
LW
1556 }
1557 }
3280af22 1558 fp = nextargv(PL_last_in_gv);
a0d0e21e 1559 if (!fp) { /* Note: fp != IoIFP(io) */
3280af22 1560 (void)do_close(PL_last_in_gv, FALSE); /* now it does*/
a0d0e21e
LW
1561 }
1562 }
0d44d22b
NC
1563 else if (type == OP_GLOB)
1564 fp = Perl_start_glob(aTHX_ POPs, io);
a0d0e21e
LW
1565 }
1566 else if (type == OP_GLOB)
1567 SP--;
a00b5bd3 1568 else if (ckWARN(WARN_IO) && IoTYPE(io) == IoTYPE_WRONLY) {
4c80c0b2 1569 report_evil_fh(PL_last_in_gv, io, OP_phoney_OUTPUT_ONLY);
a00b5bd3 1570 }
a0d0e21e
LW
1571 }
1572 if (!fp) {
041457d9
DM
1573 if ((!io || !(IoFLAGS(io) & IOf_START))
1574 && ckWARN2(WARN_GLOB, WARN_CLOSED))
1575 {
3f4520fe 1576 if (type == OP_GLOB)
9014280d 1577 Perl_warner(aTHX_ packWARN(WARN_GLOB),
af8c498a
GS
1578 "glob failed (can't start child: %s)",
1579 Strerror(errno));
69282e91 1580 else
bc37a18f 1581 report_evil_fh(PL_last_in_gv, io, PL_op->op_type);
3f4520fe 1582 }
54310121 1583 if (gimme == G_SCALAR) {
79628082 1584 /* undef TARG, and push that undefined value */
ba92458f
AE
1585 if (type != OP_RCATLINE) {
1586 SV_CHECK_THINKFIRST_COW_DROP(TARG);
0c34ef67 1587 SvOK_off(TARG);
ba92458f 1588 }
a0d0e21e
LW
1589 PUSHTARG;
1590 }
1591 RETURN;
1592 }
a2008d6d 1593 have_fp:
54310121 1594 if (gimme == G_SCALAR) {
a0d0e21e 1595 sv = TARG;
0f722b55
RGS
1596 if (type == OP_RCATLINE && SvGMAGICAL(sv))
1597 mg_get(sv);
48de12d9
RGS
1598 if (SvROK(sv)) {
1599 if (type == OP_RCATLINE)
1600 SvPV_force_nolen(sv);
1601 else
1602 sv_unref(sv);
1603 }
f7877b28
NC
1604 else if (isGV_with_GP(sv)) {
1605 SvPV_force_nolen(sv);
1606 }
862a34c6 1607 SvUPGRADE(sv, SVt_PV);
a0d0e21e 1608 tmplen = SvLEN(sv); /* remember if already alloced */
bc44a8a2 1609 if (!tmplen && !SvREADONLY(sv))
a0d0e21e 1610 Sv_Grow(sv, 80); /* try short-buffering it */
2b5e58c4
AMS
1611 offset = 0;
1612 if (type == OP_RCATLINE && SvOK(sv)) {
1613 if (!SvPOK(sv)) {
8b6b16e7 1614 SvPV_force_nolen(sv);
2b5e58c4 1615 }
a0d0e21e 1616 offset = SvCUR(sv);
2b5e58c4 1617 }
a0d0e21e 1618 }
54310121 1619 else {
561b68a9 1620 sv = sv_2mortal(newSV(80));
54310121
PP
1621 offset = 0;
1622 }
fbad3eb5 1623
3887d568
AP
1624 /* This should not be marked tainted if the fp is marked clean */
1625#define MAYBE_TAINT_LINE(io, sv) \
1626 if (!(IoFLAGS(io) & IOf_UNTAINT)) { \
1627 TAINT; \
1628 SvTAINTED_on(sv); \
1629 }
1630
684bef36 1631/* delay EOF state for a snarfed empty file */
fbad3eb5 1632#define SNARF_EOF(gimme,rs,io,sv) \
684bef36 1633 (gimme != G_SCALAR || SvCUR(sv) \
b9fee9ba 1634 || (IoFLAGS(io) & IOf_NOLINE) || !RsSNARF(rs))
fbad3eb5 1635
a0d0e21e 1636 for (;;) {
09e8efcc 1637 PUTBACK;
fbad3eb5 1638 if (!sv_gets(sv, fp, offset)
2d726892
TF
1639 && (type == OP_GLOB
1640 || SNARF_EOF(gimme, PL_rs, io, sv)
1641 || PerlIO_error(fp)))
fbad3eb5 1642 {
760ac839 1643 PerlIO_clearerr(fp);
a0d0e21e 1644 if (IoFLAGS(io) & IOf_ARGV) {
3280af22 1645 fp = nextargv(PL_last_in_gv);
a0d0e21e
LW
1646 if (fp)
1647 continue;
3280af22 1648 (void)do_close(PL_last_in_gv, FALSE);
a0d0e21e
LW
1649 }
1650 else if (type == OP_GLOB) {
e476b1b5 1651 if (!do_close(PL_last_in_gv, FALSE) && ckWARN(WARN_GLOB)) {
9014280d 1652 Perl_warner(aTHX_ packWARN(WARN_GLOB),
4eb79ab5 1653 "glob failed (child exited with status %d%s)",
894356b3 1654 (int)(STATUS_CURRENT >> 8),
cf494569 1655 (STATUS_CURRENT & 0x80) ? ", core dumped" : "");
4eb79ab5 1656 }
a0d0e21e 1657 }
54310121 1658 if (gimme == G_SCALAR) {
ba92458f
AE
1659 if (type != OP_RCATLINE) {
1660 SV_CHECK_THINKFIRST_COW_DROP(TARG);
0c34ef67 1661 SvOK_off(TARG);
ba92458f 1662 }
09e8efcc 1663 SPAGAIN;
a0d0e21e
LW
1664 PUSHTARG;
1665 }
3887d568 1666 MAYBE_TAINT_LINE(io, sv);
a0d0e21e
LW
1667 RETURN;
1668 }
3887d568 1669 MAYBE_TAINT_LINE(io, sv);
a0d0e21e 1670 IoLINES(io)++;
b9fee9ba 1671 IoFLAGS(io) |= IOf_NOLINE;
71be2cbc 1672 SvSETMAGIC(sv);
09e8efcc 1673 SPAGAIN;
a0d0e21e 1674 XPUSHs(sv);
a0d0e21e 1675 if (type == OP_GLOB) {
349d4f2f 1676 const char *t1;
a0d0e21e 1677
3280af22 1678 if (SvCUR(sv) > 0 && SvCUR(PL_rs) > 0) {
6136c704 1679 char * const tmps = SvEND(sv) - 1;
aa07b2f6 1680 if (*tmps == *SvPVX_const(PL_rs)) {
c07a80fd 1681 *tmps = '\0';
b162af07 1682 SvCUR_set(sv, SvCUR(sv) - 1);
c07a80fd
PP
1683 }
1684 }
349d4f2f
NC
1685 for (t1 = SvPVX_const(sv); *t1; t1++)
1686 if (!isALPHA(*t1) && !isDIGIT(*t1) &&
1687 strchr("$&*(){}[]'\";\\|?<>~`", *t1))
a0d0e21e 1688 break;
349d4f2f 1689 if (*t1 && PerlLIO_lstat(SvPVX_const(sv), &PL_statbuf) < 0) {
a0d0e21e
LW
1690 (void)POPs; /* Unmatched wildcard? Chuck it... */
1691 continue;
1692 }
2d79bf7f 1693 } else if (SvUTF8(sv)) { /* OP_READLINE, OP_RCATLINE */
d4c19fe8
AL
1694 if (ckWARN(WARN_UTF8)) {
1695 const U8 * const s = (const U8*)SvPVX_const(sv) + offset;
1696 const STRLEN len = SvCUR(sv) - offset;
1697 const U8 *f;
1698
1699 if (!is_utf8_string_loc(s, len, &f))
1700 /* Emulate :encoding(utf8) warning in the same case. */
1701 Perl_warner(aTHX_ packWARN(WARN_UTF8),
1702 "utf8 \"\\x%02X\" does not map to Unicode",
1703 f < (U8*)SvEND(sv) ? *f : 0);
1704 }
a0d0e21e 1705 }
54310121 1706 if (gimme == G_ARRAY) {
a0d0e21e 1707 if (SvLEN(sv) - SvCUR(sv) > 20) {
1da4ca5f 1708 SvPV_shrink_to_cur(sv);
a0d0e21e 1709 }
561b68a9 1710 sv = sv_2mortal(newSV(80));
a0d0e21e
LW
1711 continue;
1712 }
54310121 1713 else if (gimme == G_SCALAR && !tmplen && SvLEN(sv) - SvCUR(sv) > 80) {
a0d0e21e 1714 /* try to reclaim a bit of scalar space (only on 1st alloc) */
d5b5861b
NC
1715 const STRLEN new_len
1716 = SvCUR(sv) < 60 ? 80 : SvCUR(sv)+40; /* allow some slop */
1da4ca5f 1717 SvPV_renew(sv, new_len);
a0d0e21e
LW
1718 }
1719 RETURN;
1720 }
1721}
1722
1723PP(pp_enter)
1724{
27da23d5 1725 dVAR; dSP;
c09156bb 1726 register PERL_CONTEXT *cx;
533c011a 1727 I32 gimme = OP_GIMME(PL_op, -1);
a0d0e21e 1728
54310121
PP
1729 if (gimme == -1) {
1730 if (cxstack_ix >= 0)
1731 gimme = cxstack[cxstack_ix].blk_gimme;
1732 else
1733 gimme = G_SCALAR;
1734 }
a0d0e21e
LW
1735
1736 ENTER;
1737
1738 SAVETMPS;
924508f0 1739 PUSHBLOCK(cx, CXt_BLOCK, SP);
a0d0e21e
LW
1740
1741 RETURN;
1742}
1743
1744PP(pp_helem)
1745{
97aff369 1746 dVAR; dSP;
760ac839 1747 HE* he;
ae77835f 1748 SV **svp;
c445ea15
AL
1749 SV * const keysv = POPs;
1750 HV * const hv = (HV*)POPs;
a3b680e6
AL
1751 const U32 lval = PL_op->op_flags & OPf_MOD || LVRET;
1752 const U32 defer = PL_op->op_private & OPpLVAL_DEFER;
be6c24e0 1753 SV *sv;
c158a4fd 1754 const U32 hash = (SvIsCOW_shared_hash(keysv)) ? SvSHARED_HASH(keysv) : 0;
9c5ffd7c 1755 I32 preeminent = 0;
a0d0e21e 1756
d4c19fe8 1757 if (SvTYPE(hv) != SVt_PVHV)
a0d0e21e 1758 RETPUSHUNDEF;
d4c19fe8
AL
1759
1760 if (PL_op->op_private & OPpLVAL_INTRO) {
1761 MAGIC *mg;
1762 HV *stash;
1763 /* does the element we're localizing already exist? */
1764 preeminent = /* can we determine whether it exists? */
1765 ( !SvRMAGICAL(hv)
1766 || mg_find((SV*)hv, PERL_MAGIC_env)
1767 || ( (mg = mg_find((SV*)hv, PERL_MAGIC_tied))
1768 /* Try to preserve the existenceness of a tied hash
1769 * element by using EXISTS and DELETE if possible.
1770 * Fallback to FETCH and STORE otherwise */
1771 && (stash = SvSTASH(SvRV(SvTIED_obj((SV*)hv, mg))))
1772 && gv_fetchmethod_autoload(stash, "EXISTS", TRUE)
1773 && gv_fetchmethod_autoload(stash, "DELETE", TRUE)
1774 )
1775 ) ? hv_exists_ent(hv, keysv, 0) : 1;
1776 }
1777 he = hv_fetch_ent(hv, keysv, lval && !defer, hash);
1778 svp = he ? &HeVAL(he) : NULL;
a0d0e21e 1779 if (lval) {
3280af22 1780 if (!svp || *svp == &PL_sv_undef) {
68dc0745
PP
1781 SV* lv;
1782 SV* key2;
2d8e6c8d 1783 if (!defer) {
be2597df 1784 DIE(aTHX_ PL_no_helem_sv, SVfARG(keysv));
2d8e6c8d 1785 }
68dc0745
PP
1786 lv = sv_newmortal();
1787 sv_upgrade(lv, SVt_PVLV);
1788 LvTYPE(lv) = 'y';
6136c704 1789 sv_magic(lv, key2 = newSVsv(keysv), PERL_MAGIC_defelem, NULL, 0);
68dc0745 1790 SvREFCNT_dec(key2); /* sv_magic() increments refcount */
b37c2d43 1791 LvTARG(lv) = SvREFCNT_inc_simple(hv);
68dc0745
PP
1792 LvTARGLEN(lv) = 1;
1793 PUSHs(lv);
1794 RETURN;
1795 }
533c011a 1796 if (PL_op->op_private & OPpLVAL_INTRO) {
bfcb3514 1797 if (HvNAME_get(hv) && isGV(*svp))
533c011a 1798 save_gp((GV*)*svp, !(PL_op->op_flags & OPf_SPECIAL));
1f5346dc
SC
1799 else {
1800 if (!preeminent) {
1801 STRLEN keylen;
e62f0680 1802 const char * const key = SvPV_const(keysv, keylen);
7d654f43 1803 SAVEDELETE(hv, savepvn(key,keylen),
bb7a0f54 1804 SvUTF8(keysv) ? -(I32)keylen : (I32)keylen);
bfc4de9f 1805 } else
1f5346dc
SC
1806 save_helem(hv, keysv, svp);
1807 }
5f05dabc 1808 }
533c011a
NIS
1809 else if (PL_op->op_private & OPpDEREF)
1810 vivify_ref(*svp, PL_op->op_private & OPpDEREF);
a0d0e21e 1811 }
3280af22 1812 sv = (svp ? *svp : &PL_sv_undef);
be6c24e0
GS
1813 /* This makes C<local $tied{foo} = $tied{foo}> possible.
1814 * Pushing the magical RHS on to the stack is useless, since
1815 * that magic is soon destined to be misled by the local(),
1816 * and thus the later pp_sassign() will fail to mg_get() the
1817 * old value. This should also cure problems with delayed
1818 * mg_get()s. GSAR 98-07-03 */
1819 if (!lval && SvGMAGICAL(sv))
1820 sv = sv_mortalcopy(sv);
1821 PUSHs(sv);
a0d0e21e
LW
1822 RETURN;
1823}
1824
1825PP(pp_leave)
1826{
27da23d5 1827 dVAR; dSP;
c09156bb 1828 register PERL_CONTEXT *cx;
a0d0e21e
LW
1829 SV **newsp;
1830 PMOP *newpm;
1831 I32 gimme;
1832
533c011a 1833 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e 1834 cx = &cxstack[cxstack_ix];
3280af22 1835 cx->blk_oldpm = PL_curpm; /* fake block should preserve $1 et al */
a0d0e21e
LW
1836 }
1837
1838 POPBLOCK(cx,newpm);
1839
533c011a 1840 gimme = OP_GIMME(PL_op, -1);
54310121
PP
1841 if (gimme == -1) {
1842 if (cxstack_ix >= 0)
1843 gimme = cxstack[cxstack_ix].blk_gimme;
1844 else
1845 gimme = G_SCALAR;
1846 }
a0d0e21e 1847
a1f49e72 1848 TAINT_NOT;
54310121
PP
1849 if (gimme == G_VOID)
1850 SP = newsp;
1851 else if (gimme == G_SCALAR) {
a3b680e6 1852 register SV **mark;
54310121 1853 MARK = newsp + 1;
09256e2f 1854 if (MARK <= SP) {
54310121
PP
1855 if (SvFLAGS(TOPs) & (SVs_PADTMP|SVs_TEMP))
1856 *MARK = TOPs;
1857 else
1858 *MARK = sv_mortalcopy(TOPs);
09256e2f 1859 } else {
54310121 1860 MEXTEND(mark,0);
3280af22 1861 *MARK = &PL_sv_undef;
a0d0e21e 1862 }
54310121 1863 SP = MARK;
a0d0e21e 1864 }
54310121 1865 else if (gimme == G_ARRAY) {
a1f49e72 1866 /* in case LEAVE wipes old return values */
a3b680e6 1867 register SV **mark;
a1f49e72
CS
1868 for (mark = newsp + 1; mark <= SP; mark++) {
1869 if (!(SvFLAGS(*mark) & (SVs_PADTMP|SVs_TEMP))) {
a0d0e21e 1870 *mark = sv_mortalcopy(*mark);
a1f49e72
CS
1871 TAINT_NOT; /* Each item is independent */
1872 }
1873 }
a0d0e21e 1874 }
3280af22 1875 PL_curpm = newpm; /* Don't pop $1 et al till now */
a0d0e21e
LW
1876
1877 LEAVE;
1878
1879 RETURN;
1880}
1881
1882PP(pp_iter)
1883{
97aff369 1884 dVAR; dSP;
c09156bb 1885 register PERL_CONTEXT *cx;
dc09a129 1886 SV *sv, *oldsv;
4633a7c4 1887 AV* av;
1d7c1841 1888 SV **itersvp;
a0d0e21e 1889
924508f0 1890 EXTEND(SP, 1);
a0d0e21e 1891 cx = &cxstack[cxstack_ix];
6b35e009 1892 if (CxTYPE(cx) != CXt_LOOP)
cea2e8a9 1893 DIE(aTHX_ "panic: pp_iter");
a0d0e21e 1894
1d7c1841 1895 itersvp = CxITERVAR(cx);
4633a7c4 1896 av = cx->blk_loop.iterary;
89ea2908
GA
1897 if (SvTYPE(av) != SVt_PVAV) {
1898 /* iterate ($min .. $max) */
1899 if (cx->blk_loop.iterlval) {
1900 /* string increment */
1901 register SV* cur = cx->blk_loop.iterlval;
4fe3f0fa 1902 STRLEN maxlen = 0;
10edeb5d
JH
1903 const char *max =
1904 SvOK((SV*)av) ?
1905 SvPV_const((SV*)av, maxlen) : (const char *)"";
89ea2908 1906 if (!SvNIOK(cur) && SvCUR(cur) <= maxlen) {
1d7c1841 1907 if (SvREFCNT(*itersvp) == 1 && !SvMAGICAL(*itersvp)) {
eaa5c2d6 1908 /* safe to reuse old SV */
1d7c1841 1909 sv_setsv(*itersvp, cur);
eaa5c2d6 1910 }
1c846c1f 1911 else
eaa5c2d6
GA
1912 {
1913 /* we need a fresh SV every time so that loop body sees a
1914 * completely new SV for closures/references to work as
1915 * they used to */
dc09a129 1916 oldsv = *itersvp;
1d7c1841 1917 *itersvp = newSVsv(cur);
dc09a129 1918 SvREFCNT_dec(oldsv);
eaa5c2d6 1919 }
aa07b2f6 1920 if (strEQ(SvPVX_const(cur), max))
89ea2908
GA
1921 sv_setiv(cur, 0); /* terminate next time */
1922 else
1923 sv_inc(cur);
1924 RETPUSHYES;
1925 }
1926 RETPUSHNO;
1927 }
1928 /* integer increment */
1929 if (cx->blk_loop.iterix > cx->blk_loop.itermax)
1930 RETPUSHNO;
7f61b687 1931
3db8f154 1932 /* don't risk potential race */
1d7c1841 1933 if (SvREFCNT(*itersvp) == 1 && !SvMAGICAL(*itersvp)) {
eaa5c2d6 1934 /* safe to reuse old SV */
1d7c1841 1935 sv_setiv(*itersvp, cx->blk_loop.iterix++);
eaa5c2d6 1936 }
1c846c1f 1937 else
eaa5c2d6
GA
1938 {
1939 /* we need a fresh SV every time so that loop body sees a
1940 * completely new SV for closures/references to work as they
1941 * used to */
dc09a129 1942 oldsv = *itersvp;
1d7c1841 1943 *itersvp = newSViv(cx->blk_loop.iterix++);
dc09a129 1944 SvREFCNT_dec(oldsv);
eaa5c2d6 1945 }
89ea2908
GA
1946 RETPUSHYES;
1947 }
1948
1949 /* iterate array */
ef3e5ea9
NC
1950 if (PL_op->op_private & OPpITER_REVERSED) {
1951 /* In reverse, use itermax as the min :-) */
c491ecac 1952 if (cx->blk_loop.iterix <= cx->blk_loop.itermax)
ef3e5ea9 1953 RETPUSHNO;
a0d0e21e 1954
ef3e5ea9 1955 if (SvMAGICAL(av) || AvREIFY(av)) {
c445ea15 1956 SV * const * const svp = av_fetch(av, --cx->blk_loop.iterix, FALSE);
a0714e2c 1957 sv = svp ? *svp : NULL;
ef3e5ea9
NC
1958 }
1959 else {
6e585ca0 1960 sv = AvARRAY(av)[--cx->blk_loop.iterix];
ef3e5ea9 1961 }
d42935ef
JH
1962 }
1963 else {
ef3e5ea9
NC
1964 if (cx->blk_loop.iterix >= (av == PL_curstack ? cx->blk_oldsp :
1965 AvFILL(av)))
1966 RETPUSHNO;
1967
1968 if (SvMAGICAL(av) || AvREIFY(av)) {
c445ea15 1969 SV * const * const svp = av_fetch(av, ++cx->blk_loop.iterix, FALSE);
a0714e2c 1970 sv = svp ? *svp : NULL;
ef3e5ea9
NC
1971 }
1972 else {
1973 sv = AvARRAY(av)[++cx->blk_loop.iterix];
1974 }
d42935ef 1975 }
ef3e5ea9 1976
0565a181 1977 if (sv && SvIS_FREED(sv)) {
a0714e2c 1978 *itersvp = NULL;
b6c83531 1979 Perl_croak(aTHX_ "Use of freed value in iteration");
cccede53
DM
1980 }
1981
d42935ef 1982 if (sv)
a0d0e21e 1983 SvTEMP_off(sv);
a0d0e21e 1984 else
3280af22 1985 sv = &PL_sv_undef;
8b530633 1986 if (av != PL_curstack && sv == &PL_sv_undef) {
5f05dabc 1987 SV *lv = cx->blk_loop.iterlval;
71be2cbc
PP
1988 if (lv && SvREFCNT(lv) > 1) {
1989 SvREFCNT_dec(lv);
a0714e2c 1990 lv = NULL;
71be2cbc 1991 }
5f05dabc
PP
1992 if (lv)
1993 SvREFCNT_dec(LvTARG(lv));
1994 else {
b9f83d2f 1995 lv = cx->blk_loop.iterlval = newSV_type(SVt_PVLV);
5f05dabc 1996 LvTYPE(lv) = 'y';
6136c704 1997 sv_magic(lv, NULL, PERL_MAGIC_defelem, NULL, 0);
5f05dabc 1998 }
b37c2d43 1999 LvTARG(lv) = SvREFCNT_inc_simple(av);
5f05dabc 2000 LvTARGOFF(lv) = cx->blk_loop.iterix;
42718184 2001 LvTARGLEN(lv) = (STRLEN)UV_MAX;
5f05dabc
PP
2002 sv = (SV*)lv;
2003 }
a0d0e21e 2004
dc09a129 2005 oldsv = *itersvp;
b37c2d43 2006 *itersvp = SvREFCNT_inc_simple_NN(sv);
dc09a129
DM
2007 SvREFCNT_dec(oldsv);
2008
a0d0e21e
LW
2009 RETPUSHYES;
2010}
2011
2012PP(pp_subst)
2013{
97aff369 2014 dVAR; dSP; dTARG;
a0d0e21e
LW
2015 register PMOP *pm = cPMOP;
2016 PMOP *rpm = pm;
a0d0e21e
LW
2017 register char *s;
2018 char *strend;
2019 register char *m;
5c144d81 2020 const char *c;
a0d0e21e
LW
2021 register char *d;
2022 STRLEN clen;
2023 I32 iters = 0;
2024 I32 maxiters;
2025 register I32 i;
2026 bool once;
71be2cbc 2027 bool rxtainted;
a0d0e21e 2028 char *orig;
22e551b9 2029 I32 r_flags;
aaa362c4 2030 register REGEXP *rx = PM_GETRE(pm);
a0d0e21e
LW
2031 STRLEN len;
2032 int force_on_match = 0;
0bcc34c2 2033 const I32 oldsave = PL_savestack_ix;
792b2c16 2034 STRLEN slen;
f272994b 2035 bool doutf8 = FALSE;
f8c7b90f 2036#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
2037 bool is_cow;
2038#endif
a0714e2c 2039 SV *nsv = NULL;
a0d0e21e 2040
5cd24f17 2041 /* known replacement string? */
b37c2d43 2042 register SV *dstr = (pm->op_pmflags & PMf_CONST) ? POPs : NULL;
533c011a 2043 if (PL_op->op_flags & OPf_STACKED)
a0d0e21e 2044 TARG = POPs;
59f00321
RGS
2045 else if (PL_op->op_private & OPpTARGET_MY)
2046 GETTARGET;
a0d0e21e 2047 else {
54b9620d 2048 TARG = DEFSV;
a0d0e21e 2049 EXTEND(SP,1);
1c846c1f 2050 }
d9f424b2 2051
f8c7b90f 2052#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
2053 /* Awooga. Awooga. "bool" types that are actually char are dangerous,
2054 because they make integers such as 256 "false". */
2055 is_cow = SvIsCOW(TARG) ? TRUE : FALSE;
2056#else
765f542d
NC
2057 if (SvIsCOW(TARG))
2058 sv_force_normal_flags(TARG,0);
ed252734
NC
2059#endif
2060 if (
f8c7b90f 2061#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
2062 !is_cow &&
2063#endif
2064 (SvREADONLY(TARG)
cecf5685
NC
2065 || ( ((SvTYPE(TARG) == SVt_PVGV && isGV_with_GP(TARG))
2066 || SvTYPE(TARG) > SVt_PVLV)
4ce457a6 2067 && !(SvTYPE(TARG) == SVt_PVGV && SvFAKE(TARG)))))
d470f89e 2068 DIE(aTHX_ PL_no_modify);
8ec5e241
NIS
2069 PUTBACK;
2070
d5263905 2071 s = SvPV_mutable(TARG, len);
68dc0745 2072 if (!SvPOKp(TARG) || SvTYPE(TARG) == SVt_PVGV)
a0d0e21e 2073 force_on_match = 1;
c737faaf 2074 rxtainted = ((rx->extflags & RXf_TAINTED) ||
3280af22
NIS
2075 (PL_tainted && (pm->op_pmflags & PMf_RETAINT)));
2076 if (PL_tainted)
b3eb6a9b 2077 rxtainted |= 2;
9212bbba 2078 TAINT_NOT;
a12c0f56 2079
a30b2f1f 2080 RX_MATCH_UTF8_set(rx, DO_UTF8(TARG));
d9f424b2 2081
a0d0e21e
LW
2082 force_it:
2083 if (!pm || !s)
2269b42e 2084 DIE(aTHX_ "panic: pp_subst");
a0d0e21e
LW
2085
2086 strend = s + len;
a30b2f1f 2087 slen = RX_MATCH_UTF8(rx) ? utf8_length((U8*)s, (U8*)strend) : len;
792b2c16
JH
2088 maxiters = 2 * slen + 10; /* We can match twice at each
2089 position, once with zero-length,
2090 second time with non-zero. */
a0d0e21e 2091
3280af22
NIS
2092 if (!rx->prelen && PL_curpm) {
2093 pm = PL_curpm;
aaa362c4 2094 rx = PM_GETRE(pm);
a0d0e21e 2095 }
0b78c20a 2096 r_flags = (rx->nparens || SvTEMP(TARG) || PL_sawampersand
c737faaf 2097 || (rx->extflags & (RXf_EVAL_SEEN|RXf_PMf_KEEPCOPY)) )
ed252734 2098 ? REXEC_COPY_STR : 0;
f722798b 2099 if (SvSCREAM(TARG))
22e551b9 2100 r_flags |= REXEC_SCREAM;
7fba1cd6 2101
a0d0e21e 2102 orig = m = s;
bbe252da 2103 if (rx->extflags & RXf_USE_INTUIT) {
ee0b7718 2104 PL_bostr = orig;
f9f4320a 2105 s = CALLREG_INTUIT_START(rx, TARG, s, strend, r_flags, NULL);
f722798b
IZ
2106
2107 if (!s)
2108 goto nope;
2109 /* How to do it in subst? */
bbe252da 2110/* if ( (rx->extflags & RXf_CHECK_ALL)
1c846c1f 2111 && !PL_sawampersand
c737faaf 2112 && !(rx->extflags & RXf_KEEPCOPY)
bbe252da
YO
2113 && ((rx->extflags & RXf_NOSCAN)
2114 || !((rx->extflags & RXf_INTUIT_TAIL)
f722798b
IZ
2115 && (r_flags & REXEC_SCREAM))))
2116 goto yup;
2117*/
a0d0e21e 2118 }
71be2cbc
PP
2119
2120 /* only replace once? */
a0d0e21e 2121 once = !(rpm->op_pmflags & PMf_GLOBAL);
71be2cbc
PP
2122
2123 /* known replacement string? */
f272994b 2124 if (dstr) {
8514a05a
JH
2125 /* replacement needing upgrading? */
2126 if (DO_UTF8(TARG) && !doutf8) {
db79b45b 2127 nsv = sv_newmortal();
4a176938 2128 SvSetSV(nsv, dstr);
8514a05a
JH
2129 if (PL_encoding)
2130 sv_recode_to_utf8(nsv, PL_encoding);
2131 else
2132 sv_utf8_upgrade(nsv);
5c144d81 2133 c = SvPV_const(nsv, clen);
4a176938
JH
2134 doutf8 = TRUE;
2135 }
2136 else {
5c144d81 2137 c = SvPV_const(dstr, clen);
4a176938 2138 doutf8 = DO_UTF8(dstr);
8514a05a 2139 }
f272994b
A
2140 }
2141 else {
6136c704 2142 c = NULL;
f272994b
A
2143 doutf8 = FALSE;
2144 }
2145
71be2cbc 2146 /* can do inplace substitution? */
ed252734 2147 if (c
f8c7b90f 2148#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
2149 && !is_cow
2150#endif
de8c5301 2151 && (I32)clen <= rx->minlenret && (once || !(r_flags & REXEC_COPY_STR))
bbe252da 2152 && !(rx->extflags & RXf_LOOKBEHIND_SEEN)
db79b45b 2153 && (!doutf8 || SvUTF8(TARG))) {
f9f4320a 2154 if (!CALLREGEXEC(rx, s, strend, orig, 0, TARG, NULL,
f722798b
IZ
2155 r_flags | REXEC_CHECKED))
2156 {
8ec5e241 2157 SPAGAIN;
3280af22 2158 PUSHs(&PL_sv_no);
71be2cbc
PP
2159 LEAVE_SCOPE(oldsave);
2160 RETURN;
2161 }
f8c7b90f 2162#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
2163 if (SvIsCOW(TARG)) {
2164 assert (!force_on_match);
2165 goto have_a_cow;
2166 }
2167#endif
71be2cbc
PP
2168 if (force_on_match) {
2169 force_on_match = 0;
2170 s = SvPV_force(TARG, len);
2171 goto force_it;
2172 }
71be2cbc 2173 d = s;
3280af22 2174 PL_curpm = pm;
71be2cbc
PP
2175 SvSCREAM_off(TARG); /* disable possible screamer */
2176 if (once) {
48c036b1 2177 rxtainted |= RX_MATCH_TAINTED(rx);
f0ab9afb
NC
2178 m = orig + rx->offs[0].start;
2179 d = orig + rx->offs[0].end;
71be2cbc
PP
2180 s = orig;
2181 if (m - s > strend - d) { /* faster to shorten from end */
2182 if (clen) {
2183 Copy(c, m, clen, char);
2184 m += clen;
a0d0e21e 2185 }
71be2cbc
PP
2186 i = strend - d;
2187 if (i > 0) {
2188 Move(d, m, i, char);
2189 m += i;
a0d0e21e 2190 }
71be2cbc
PP
2191 *m = '\0';
2192 SvCUR_set(TARG, m - s);
2193 }
155aba94 2194 else if ((i = m - s)) { /* faster from front */
71be2cbc
PP
2195 d -= clen;
2196 m = d;
2197 sv_chop(TARG, d-i);
2198 s += i;
2199 while (i--)
2200 *--d = *--s;
2201 if (clen)
2202 Copy(c, m, clen, char);
2203 }
2204 else if (clen) {
2205 d -= clen;
2206 sv_chop(TARG, d);
2207 Copy(c, d, clen, char);
2208 }
2209 else {
2210 sv_chop(TARG, d);
2211 }
48c036b1 2212 TAINT_IF(rxtainted & 1);
8ec5e241 2213 SPAGAIN;
3280af22 2214 PUSHs(&PL_sv_yes);
71be2cbc
PP
2215 }
2216 else {
71be2cbc
PP
2217 do {
2218 if (iters++ > maxiters)
cea2e8a9 2219 DIE(aTHX_ "Substitution loop");
d9f97599 2220 rxtainted |= RX_MATCH_TAINTED(rx);
f0ab9afb 2221 m = rx->offs[0].start + orig;
155aba94 2222 if ((i = m - s)) {
71be2cbc
PP
2223 if (s != d)
2224 Move(s, d, i, char);
2225 d += i;
a0d0e21e 2226 }
71be2cbc
PP
2227 if (clen) {
2228 Copy(c, d, clen, char);
2229 d += clen;
2230 }
f0ab9afb 2231 s = rx->offs[0].end + orig;
f9f4320a 2232 } while (CALLREGEXEC(rx, s, strend, orig, s == m,
f722798b
IZ
2233 TARG, NULL,
2234 /* don't match same null twice */
2235 REXEC_NOT_FIRST|REXEC_IGNOREPOS));
71be2cbc
PP
2236 if (s != d) {
2237 i = strend - s;
aa07b2f6 2238 SvCUR_set(TARG, d - SvPVX_const(TARG) + i);
71be2cbc 2239 Move(s, d, i+1, char); /* include the NUL */
a0d0e21e 2240 }
48c036b1 2241 TAINT_IF(rxtainted & 1);
8ec5e241 2242 SPAGAIN;
71be2cbc 2243 PUSHs(sv_2mortal(newSViv((I32)iters)));
a0d0e21e 2244 }
80b498e0 2245 (void)SvPOK_only_UTF8(TARG);
48c036b1 2246 TAINT_IF(rxtainted);
8ec5e241
NIS
2247 if (SvSMAGICAL(TARG)) {
2248 PUTBACK;
2249 mg_set(TARG);
2250 SPAGAIN;
2251 }
9212bbba 2252 SvTAINT(TARG);
aefe6dfc
JH
2253 if (doutf8)
2254 SvUTF8_on(TARG);
71be2cbc
PP
2255 LEAVE_SCOPE(oldsave);
2256 RETURN;
a0d0e21e 2257 }
71be2cbc 2258
f9f4320a 2259 if (CALLREGEXEC(rx, s, strend, orig, 0, TARG, NULL,
f722798b
IZ
2260 r_flags | REXEC_CHECKED))
2261 {
a0d0e21e
LW
2262 if (force_on_match) {
2263 force_on_match = 0;
2264 s = SvPV_force(TARG, len);
2265 goto force_it;
2266 }
f8c7b90f 2267#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
2268 have_a_cow:
2269#endif
48c036b1 2270 rxtainted |= RX_MATCH_TAINTED(rx);
f2b990bf 2271 dstr = newSVpvn(m, s-m);
cff085c1 2272 SAVEFREESV(dstr);
ffc61ed2
JH
2273 if (DO_UTF8(TARG))
2274 SvUTF8_on(dstr);
3280af22 2275 PL_curpm = pm;
a0d0e21e 2276 if (!c) {
c09156bb 2277 register PERL_CONTEXT *cx;
8ec5e241 2278 SPAGAIN;
a0d0e21e 2279 PUSHSUBST(cx);
20e98b0f 2280 RETURNOP(cPMOP->op_pmreplrootu.op_pmreplroot);
a0d0e21e 2281 }
cf93c79d 2282 r_flags |= REXEC_IGNOREPOS | REXEC_NOT_FIRST;
a0d0e21e
LW
2283 do {
2284 if (iters++ > maxiters)
cea2e8a9 2285 DIE(aTHX_ "Substitution loop");
d9f97599 2286 rxtainted |= RX_MATCH_TAINTED(rx);
cf93c79d 2287 if (RX_MATCH_COPIED(rx) && rx->subbeg != orig) {
a0d0e21e
LW
2288 m = s;
2289 s = orig;
cf93c79d 2290 orig = rx->subbeg;
a0d0e21e
LW
2291 s = orig + (m - s);
2292 strend = s + (strend - m);
2293 }
f0ab9afb 2294 m = rx->offs[0].start + orig;
db79b45b
JH
2295 if (doutf8 && !SvUTF8(dstr))
2296 sv_catpvn_utf8_upgrade(dstr, s, m - s, nsv);
2297 else
2298 sv_catpvn(dstr, s, m-s);
f0ab9afb 2299 s = rx->offs[0].end + orig;
a0d0e21e
LW
2300 if (clen)
2301 sv_catpvn(dstr, c, clen);
2302 if (once)
2303 break;
f9f4320a 2304 } while (CALLREGEXEC(rx, s, strend, orig, s == m,
ffc61ed2 2305 TARG, NULL, r_flags));
db79b45b
JH
2306 if (doutf8 && !DO_UTF8(TARG))
2307 sv_catpvn_utf8_upgrade(dstr, s, strend - s, nsv);
89afcb60
A
2308 else
2309 sv_catpvn(dstr, s, strend - s);
748a9306 2310
f8c7b90f 2311#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
2312 /* The match may make the string COW. If so, brilliant, because that's
2313 just saved us one malloc, copy and free - the regexp has donated
2314 the old buffer, and we malloc an entirely new one, rather than the
2315 regexp malloc()ing a buffer and copying our original, only for
2316 us to throw it away here during the substitution. */
2317 if (SvIsCOW(TARG)) {
2318 sv_force_normal_flags(TARG, SV_COW_DROP_PV);
2319 } else
2320#endif
2321 {
8bd4d4c5 2322 SvPV_free(TARG);
ed252734 2323 }
f880fe2f 2324 SvPV_set(TARG, SvPVX(dstr));
748a9306
LW
2325 SvCUR_set(TARG, SvCUR(dstr));
2326 SvLEN_set(TARG, SvLEN(dstr));
f272994b 2327 doutf8 |= DO_UTF8(dstr);
6136c704 2328 SvPV_set(dstr, NULL);
748a9306 2329
48c036b1 2330 TAINT_IF(rxtainted & 1);
f878fbec 2331 SPAGAIN;
48c036b1
GS
2332 PUSHs(sv_2mortal(newSViv((I32)iters)));
2333
a0d0e21e 2334 (void)SvPOK_only(TARG);
f272994b 2335 if (doutf8)
60aeb6fd 2336 SvUTF8_on(TARG);
48c036b1 2337 TAINT_IF(rxtainted);
a0d0e21e 2338 SvSETMAGIC(TARG);
9212bbba 2339 SvTAINT(TARG);
4633a7c4 2340 LEAVE_SCOPE(oldsave);
a0d0e21e
LW
2341 RETURN;
2342 }
5cd24f17 2343 goto ret_no;
a0d0e21e
LW
2344
2345nope:
1c846c1f 2346ret_no:
8ec5e241 2347 SPAGAIN;
3280af22 2348 PUSHs(&PL_sv_no);
4633a7c4 2349 LEAVE_SCOPE(oldsave);
a0d0e21e
LW
2350 RETURN;
2351}
2352
2353PP(pp_grepwhile)
2354{
27da23d5 2355 dVAR; dSP;
a0d0e21e
LW
2356
2357 if (SvTRUEx(POPs))
3280af22
NIS
2358 PL_stack_base[PL_markstack_ptr[-1]++] = PL_stack_base[*PL_markstack_ptr];
2359 ++*PL_markstack_ptr;
a0d0e21e
LW
2360 LEAVE; /* exit inner scope */
2361
2362 /* All done yet? */
3280af22 2363 if (PL_stack_base + *PL_markstack_ptr > SP) {
a0d0e21e 2364 I32 items;
c4420975 2365 const I32 gimme = GIMME_V;
a0d0e21e
LW
2366
2367 LEAVE; /* exit outer scope */
2368 (void)POPMARK; /* pop src */
3280af22 2369 items = --*PL_markstack_ptr - PL_markstack_ptr[-1];
a0d0e21e 2370 (void)POPMARK; /* pop dst */
3280af22 2371 SP = PL_stack_base + POPMARK; /* pop original mark */
54310121 2372 if (gimme == G_SCALAR) {
7cc47870 2373 if (PL_op->op_private & OPpGREP_LEX) {
c4420975 2374 SV* const sv = sv_newmortal();
7cc47870
RGS
2375 sv_setiv(sv, items);
2376 PUSHs(sv);
2377 }
2378 else {
2379 dTARGET;
2380 XPUSHi(items);
2381 }
a0d0e21e 2382 }
54310121
PP
2383 else if (gimme == G_ARRAY)
2384 SP += items;
a0d0e21e
LW
2385 RETURN;
2386 }
2387 else {
2388 SV *src;
2389
2390 ENTER; /* enter inner scope */
1d7c1841 2391 SAVEVPTR(PL_curpm);
a0d0e21e 2392
3280af22 2393 src = PL_stack_base[*PL_markstack_ptr];
a0d0e21e 2394 SvTEMP_off(src);
59f00321
RGS
2395 if (PL_op->op_private & OPpGREP_LEX)
2396 PAD_SVl(PL_op->op_targ) = src;
2397 else
2398 DEFSV = src;
a0d0e21e
LW
2399
2400 RETURNOP(cLOGOP->op_other);
2401 }
2402}
2403
2404PP(pp_leavesub)
2405{
27da23d5 2406 dVAR; dSP;
a0d0e21e
LW
2407 SV **mark;
2408 SV **newsp;
2409 PMOP *newpm;
2410 I32 gimme;
c09156bb 2411 register PERL_CONTEXT *cx;
b0d9ce38 2412 SV *sv;
a0d0e21e 2413
9850bf21
RH
2414 if (CxMULTICALL(&cxstack[cxstack_ix]))
2415 return 0;
2416
a0d0e21e 2417 POPBLOCK(cx,newpm);
5dd42e15 2418 cxstack_ix++; /* temporarily protect top context */
1c846c1f 2419
a1f49e72 2420 TAINT_NOT;
a0d0e21e
LW
2421 if (gimme == G_SCALAR) {
2422 MARK = newsp + 1;
a29cdaf0 2423 if (MARK <= SP) {
a8bba7fa 2424 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
a29cdaf0
IZ
2425 if (SvTEMP(TOPs)) {
2426 *MARK = SvREFCNT_inc(TOPs);
2427 FREETMPS;
2428 sv_2mortal(*MARK);
cd06dffe
GS
2429 }
2430 else {
959e3673 2431 sv = SvREFCNT_inc(TOPs); /* FREETMPS could clobber it */
a29cdaf0 2432 FREETMPS;
959e3673
GS
2433 *MARK = sv_mortalcopy(sv);
2434 SvREFCNT_dec(sv);
a29cdaf0 2435 }
cd06dffe
GS
2436 }
2437 else
a29cdaf0 2438 *MARK = SvTEMP(TOPs) ? TOPs : sv_mortalcopy(TOPs);
cd06dffe
GS
2439 }
2440 else {
f86702cc 2441 MEXTEND(MARK, 0);
3280af22 2442 *MARK = &PL_sv_undef;
a0d0e21e
LW
2443 }
2444 SP = MARK;
2445 }
54310121 2446 else if (gimme == G_ARRAY) {
f86702cc 2447 for (MARK = newsp + 1; MARK <= SP; MARK++) {
a1f49e72 2448 if (!SvTEMP(*MARK)) {
f86702cc 2449 *MARK = sv_mortalcopy(*MARK);
a1f49e72
CS
2450 TAINT_NOT; /* Each item is independent */
2451 }
f86702cc 2452 }
a0d0e21e 2453 }
f86702cc 2454 PUTBACK;
1c846c1f 2455
5dd42e15
DM
2456 LEAVE;
2457 cxstack_ix--;
b0d9ce38 2458 POPSUB(cx,sv); /* Stack values are safe: release CV and @_ ... */
3280af22 2459 PL_curpm = newpm; /* ... and pop $1 et al */
a0d0e21e 2460
b0d9ce38 2461 LEAVESUB(sv);
f39bc417 2462 return cx->blk_sub.retop;
a0d0e21e
LW
2463}
2464
cd06dffe
GS
2465/* This duplicates the above code because the above code must not
2466 * get any slower by more conditions */
2467PP(pp_leavesublv)
2468{
27da23d5 2469 dVAR; dSP;
cd06dffe
GS
2470 SV **mark;
2471 SV **newsp;
2472 PMOP *newpm;
2473 I32 gimme;
2474 register PERL_CONTEXT *cx;
b0d9ce38 2475 SV *sv;
cd06dffe 2476
9850bf21
RH
2477 if (CxMULTICALL(&cxstack[cxstack_ix]))
2478 return 0;
2479
cd06dffe 2480 POPBLOCK(cx,newpm);
5dd42e15 2481 cxstack_ix++; /* temporarily protect top context */
1c846c1f 2482
cd06dffe
GS
2483 TAINT_NOT;
2484
cc8d50a7 2485 if (cx->blk_sub.lval & OPpENTERSUB_INARGS) {
cd06dffe
GS
2486 /* We are an argument to a function or grep().
2487 * This kind of lvalueness was legal before lvalue
2488 * subroutines too, so be backward compatible:
2489 * cannot report errors. */
2490
2491 /* Scalar context *is* possible, on the LHS of -> only,
2492 * as in f()->meth(). But this is not an lvalue. */
2493 if (gimme == G_SCALAR)
2494 goto temporise;
2495 if (gimme == G_ARRAY) {
a8bba7fa 2496 if (!CvLVALUE(cx->blk_sub.cv))
cd06dffe
GS
2497 goto temporise_array;
2498 EXTEND_MORTAL(SP - newsp);
2499 for (mark = newsp + 1; mark <= SP; mark++) {
2500 if (SvTEMP(*mark))
6f207bd3 2501 NOOP;
cd06dffe
GS
2502 else if (SvFLAGS(*mark) & (SVs_PADTMP | SVf_READONLY))
2503 *mark = sv_mortalcopy(*mark);
2504 else {
2505 /* Can be a localized value subject to deletion. */
2506 PL_tmps_stack[++PL_tmps_ix] = *mark;
b37c2d43 2507 SvREFCNT_inc_void(*mark);
cd06dffe
GS
2508 }
2509 }
2510 }
2511 }
cc8d50a7 2512 else if (cx->blk_sub.lval) { /* Leave it as it is if we can. */
cd06dffe
GS
2513 /* Here we go for robustness, not for speed, so we change all
2514 * the refcounts so the caller gets a live guy. Cannot set
2515 * TEMP, so sv_2mortal is out of question. */
a8bba7fa 2516 if (!CvLVALUE(cx->blk_sub.cv)) {
5dd42e15
DM
2517 LEAVE;
2518 cxstack_ix--;
b0d9ce38 2519 POPSUB(cx,sv);
d470f89e 2520 PL_curpm = newpm;
b0d9ce38 2521 LEAVESUB(sv);
d470f89e
GS
2522 DIE(aTHX_ "Can't modify non-lvalue subroutine call");
2523 }
cd06dffe
GS
2524 if (gimme == G_SCALAR) {
2525 MARK = newsp + 1;
2526 EXTEND_MORTAL(1);
2527 if (MARK == SP) {
f9bc45ef
TP
2528 /* Temporaries are bad unless they happen to be elements
2529 * of a tied hash or array */
2530 if (SvFLAGS(TOPs) & (SVs_TEMP | SVs_PADTMP | SVf_READONLY) &&
2531 !(SvRMAGICAL(TOPs) && mg_find(TOPs, PERL_MAGIC_tiedelem))) {
5dd42e15
DM
2532 LEAVE;
2533 cxstack_ix--;
b0d9ce38 2534 POPSUB(cx,sv);
d470f89e 2535 PL_curpm = newpm;
b0d9ce38 2536 LEAVESUB(sv);
e9f19e3c
HS
2537 DIE(aTHX_ "Can't return %s from lvalue subroutine",
2538 SvREADONLY(TOPs) ? (TOPs == &PL_sv_undef) ? "undef"
2539 : "a readonly value" : "a temporary");
d470f89e 2540 }
cd06dffe
GS
2541 else { /* Can be a localized value
2542 * subject to deletion. */
2543 PL_tmps_stack[++PL_tmps_ix] = *mark;
b37c2d43 2544 SvREFCNT_inc_void(*mark);
cd06dffe
GS
2545 }
2546 }
d470f89e 2547 else { /* Should not happen? */
5dd42e15
DM
2548 LEAVE;
2549 cxstack_ix--;
b0d9ce38 2550 POPSUB(cx,sv);
d470f89e 2551 PL_curpm = newpm;
b0d9ce38 2552 LEAVESUB(sv);
d470f89e 2553 DIE(aTHX_ "%s returned from lvalue subroutine in scalar context",
cd06dffe 2554 (MARK > SP ? "Empty array" : "Array"));
d470f89e 2555 }
cd06dffe
GS
2556 SP = MARK;
2557 }
2558 else if (gimme == G_ARRAY) {
2559 EXTEND_MORTAL(SP - newsp);
2560 for (mark = newsp + 1; mark <= SP; mark++) {
f206cdda
AMS
2561 if (*mark != &PL_sv_undef
2562 && SvFLAGS(*mark) & (SVs_TEMP | SVs_PADTMP | SVf_READONLY)) {
d470f89e
GS
2563 /* Might be flattened array after $#array = */
2564 PUTBACK;
5dd42e15
DM
2565 LEAVE;
2566 cxstack_ix--;
b0d9ce38 2567 POPSUB(cx,sv);
d470f89e 2568 PL_curpm = newpm;
b0d9ce38 2569 LEAVESUB(sv);
f206cdda
AMS
2570 DIE(aTHX_ "Can't return a %s from lvalue subroutine",
2571 SvREADONLY(TOPs) ? "readonly value" : "temporary");
d470f89e 2572 }
cd06dffe 2573 else {
cd06dffe
GS
2574 /* Can be a localized value subject to deletion. */
2575 PL_tmps_stack[++PL_tmps_ix] = *mark;
b37c2d43 2576 SvREFCNT_inc_void(*mark);
cd06dffe
GS
2577 }
2578 }
2579 }
2580 }
2581 else {
2582 if (gimme == G_SCALAR) {
2583 temporise:
2584 MARK = newsp + 1;
2585 if (MARK <= SP) {
a8bba7fa 2586 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
cd06dffe
GS
2587 if (SvTEMP(TOPs)) {
2588 *MARK = SvREFCNT_inc(TOPs);
2589 FREETMPS;
2590 sv_2mortal(*MARK);
2591 }
2592 else {
959e3673 2593 sv = SvREFCNT_inc(TOPs); /* FREETMPS could clobber it */
cd06dffe 2594 FREETMPS;
959e3673
GS
2595 *MARK = sv_mortalcopy(sv);
2596 SvREFCNT_dec(sv);
cd06dffe
GS
2597 }
2598 }
2599 else
2600 *MARK = SvTEMP(TOPs) ? TOPs : sv_mortalcopy(TOPs);
2601 }
2602 else {
2603 MEXTEND(MARK, 0);
2604 *MARK = &PL_sv_undef;
2605 }
2606 SP = MARK;
2607 }
2608 else if (gimme == G_ARRAY) {
2609 temporise_array:
2610 for (MARK = newsp + 1; MARK <= SP; MARK++) {
2611 if (!SvTEMP(*MARK)) {
2612 *MARK = sv_mortalcopy(*MARK);
2613 TAINT_NOT; /* Each item is independent */
2614 }
2615 }
2616 }
2617 }
2618 PUTBACK;
1c846c1f 2619
5dd42e15
DM
2620 LEAVE;
2621 cxstack_ix--;
b0d9ce38 2622 POPSUB(cx,sv); /* Stack values are safe: release CV and @_ ... */
cd06dffe
GS
2623 PL_curpm = newpm; /* ... and pop $1 et al */
2624
b0d9ce38 2625 LEAVESUB(sv);
f39bc417 2626 return cx->blk_sub.retop;
cd06dffe
GS
2627}
2628
a0d0e21e
LW
2629PP(pp_entersub)
2630{
27da23d5 2631 dVAR; dSP; dPOPss;
a0d0e21e 2632 GV *gv;
a0d0e21e 2633 register CV *cv;
c09156bb 2634 register PERL_CONTEXT *cx;
5d94fbed 2635 I32 gimme;
a9c4fd4e 2636 const bool hasargs = (PL_op->op_flags & OPf_STACKED) != 0;
a0d0e21e
LW
2637
2638 if (!sv)
cea2e8a9 2639 DIE(aTHX_ "Not a CODE reference");
a0d0e21e 2640 switch (SvTYPE(sv)) {
f1025168
NC
2641 /* This is overwhelming the most common case: */
2642 case SVt_PVGV:
f730a42d
NC
2643 if (!(cv = GvCVu((GV*)sv))) {
2644 HV *stash;
f2c0649b 2645 cv = sv_2cv(sv, &stash, &gv, 0);
f730a42d 2646 }
f1025168
NC
2647 if (!cv) {
2648 ENTER;
2649 SAVETMPS;
2650 goto try_autoload;
2651 }
2652 break;
a0d0e21e
LW
2653 default:
2654 if (!SvROK(sv)) {
a9c4fd4e 2655 const char *sym;
780a5241 2656 STRLEN len;
3280af22 2657 if (sv == &PL_sv_yes) { /* unfound import, ignore */
fb73857a 2658 if (hasargs)
3280af22 2659 SP = PL_stack_base + POPMARK;
a0d0e21e 2660 RETURN;
fb73857a 2661 }
15ff848f
CS
2662 if (SvGMAGICAL(sv)) {
2663 mg_get(sv);
f5f1d18e
AMS
2664 if (SvROK(sv))
2665 goto got_rv;
780a5241
NC
2666 if (SvPOKp(sv)) {
2667 sym = SvPVX_const(sv);
2668 len = SvCUR(sv);
2669 } else {
2670 sym = NULL;
2671 len = 0;
2672 }
15ff848f 2673 }
a9c4fd4e 2674 else {
780a5241 2675 sym = SvPV_const(sv, len);
a9c4fd4e 2676 }
15ff848f 2677 if (!sym)
cea2e8a9 2678 DIE(aTHX_ PL_no_usym, "a subroutine");
533c011a 2679 if (PL_op->op_private & HINT_STRICT_REFS)
cea2e8a9 2680 DIE(aTHX_ PL_no_symref, sym, "a subroutine");
780a5241 2681 cv = get_cvn_flags(sym, len, GV_ADD|SvUTF8(sv));
a0d0e21e
LW
2682 break;
2683 }
f5f1d18e 2684 got_rv:
f5284f61 2685 {
823a54a3 2686 SV * const * sp = &sv; /* Used in tryAMAGICunDEREF macro. */
f5284f61
IZ
2687 tryAMAGICunDEREF(to_cv);
2688 }
a0d0e21e
LW
2689 cv = (CV*)SvRV(sv);
2690 if (SvTYPE(cv) == SVt_PVCV)
2691 break;
2692 /* FALL THROUGH */
2693 case SVt_PVHV:
2694 case SVt_PVAV:
cea2e8a9 2695 DIE(aTHX_ "Not a CODE reference");
f1025168 2696 /* This is the second most common case: */
a0d0e21e
LW
2697 case SVt_PVCV:
2698 cv = (CV*)sv;
2699 break;
a0d0e21e
LW
2700 }
2701
2702 ENTER;
2703 SAVETMPS;
2704
2705 retry:
a0d0e21e 2706 if (!CvROOT(cv) && !CvXSUB(cv)) {
2f349aa0
NC
2707 GV* autogv;
2708 SV* sub_name;
2709
2710 /* anonymous or undef'd function leaves us no recourse */
2711 if (CvANON(cv) || !(gv = CvGV(cv)))
2712 DIE(aTHX_ "Undefined subroutine called");
2713
2714 /* autoloaded stub? */
2715 if (cv != GvCV(gv)) {
2716 cv = GvCV(gv);
2717 }
2718 /* should call AUTOLOAD now? */
2719 else {
2720try_autoload:
2721 if ((autogv = gv_autoload4(GvSTASH(gv), GvNAME(gv), GvNAMELEN(gv),
2722 FALSE)))
2723 {
2724 cv = GvCV(autogv);
2725 }
2726 /* sorry */
2727 else {
2728 sub_name = sv_newmortal();
6136c704 2729 gv_efullname3(sub_name, gv, NULL);
be2597df 2730 DIE(aTHX_ "Undefined subroutine &%"SVf" called", SVfARG(sub_name));
2f349aa0
NC
2731 }
2732 }
2733 if (!cv)
2734 DIE(aTHX_ "Not a CODE reference");
2735 goto retry;
a0d0e21e
LW
2736 }
2737
54310121 2738 gimme = GIMME_V;
67caa1fe 2739 if ((PL_op->op_private & OPpENTERSUB_DB) && GvCV(PL_DBsub) && !CvNODEBUG(cv)) {
005a8a35 2740 Perl_get_db_sub(aTHX_ &sv, cv);
a9ef256d
NC
2741 if (CvISXSUB(cv))
2742 PL_curcopdb = PL_curcop;
2743 cv = GvCV(PL_DBsub);
2744
ccafdc96
RGS
2745 if (!cv || (!CvXSUB(cv) && !CvSTART(cv)))
2746 DIE(aTHX_ "No DB::sub routine defined");
67caa1fe 2747 }
a0d0e21e 2748
aed2304a 2749 if (!(CvISXSUB(cv))) {
f1025168 2750 /* This path taken at least 75% of the time */
a0d0e21e
LW
2751 dMARK;
2752 register I32 items = SP - MARK;
0bcc34c2 2753 AV* const padlist = CvPADLIST(cv);
a0d0e21e
LW
2754 PUSHBLOCK(cx, CXt_SUB, MARK);
2755 PUSHSUB(cx);
f39bc417 2756 cx->blk_sub.retop = PL_op->op_next;
a0d0e21e 2757 CvDEPTH(cv)++;
6b35e009
GS
2758 /* XXX This would be a natural place to set C<PL_compcv = cv> so
2759 * that eval'' ops within this sub know the correct lexical space.
a3985cdc
DM
2760 * Owing the speed considerations, we choose instead to search for
2761 * the cv using find_runcv() when calling doeval().
6b35e009 2762 */
3a76ca88
RGS
2763 if (CvDEPTH(cv) >= 2) {
2764 PERL_STACK_OVERFLOW_CHECK();
2765 pad_push(padlist, CvDEPTH(cv));
a0d0e21e 2766 }
3a76ca88
RGS
2767 SAVECOMPPAD();
2768 PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv));
2769 if (hasargs) {
0bcc34c2 2770 AV* const av = (AV*)PAD_SVl(0);
221373f0
GS
2771 if (AvREAL(av)) {
2772 /* @_ is normally not REAL--this should only ever
2773 * happen when DB::sub() calls things that modify @_ */
2774 av_clear(av);
2775 AvREAL_off(av);
2776 AvREIFY_on(av);
2777 }
3280af22 2778 cx->blk_sub.savearray = GvAV(PL_defgv);
b37c2d43 2779 GvAV(PL_defgv) = (AV*)SvREFCNT_inc_simple(av);
dd2155a4 2780 CX_CURPAD_SAVE(cx->blk_sub);
6d4ff0d2 2781 cx->blk_sub.argarray = av;
a0d0e21e
LW
2782 ++MARK;
2783
2784 if (items > AvMAX(av) + 1) {
504618e9 2785 SV **ary = AvALLOC(av);
a0d0e21e
LW
2786 if (AvARRAY(av) != ary) {
2787 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
9c6bc640 2788 AvARRAY(av) = ary;
a0d0e21e
LW
2789 }
2790 if (items > AvMAX(av) + 1) {
2791 AvMAX(av) = items - 1;
2792 Renew(ary,items,SV*);
2793 AvALLOC(av) = ary;
9c6bc640 2794 AvARRAY(av) = ary;
a0d0e21e
LW
2795 }
2796 }
2797 Copy(MARK,AvARRAY(av),items,SV*);
93965878 2798 AvFILLp(av) = items - 1;
1c846c1f 2799
a0d0e21e
LW
2800 while (items--) {
2801 if (*MARK)
2802 SvTEMP_off(*MARK);
2803 MARK++;
2804 }
2805 }
4a925ff6
GS
2806 /* warning must come *after* we fully set up the context
2807 * stuff so that __WARN__ handlers can safely dounwind()
2808 * if they want to
2809 */
2810 if (CvDEPTH(cv) == 100 && ckWARN(WARN_RECURSION)
2811 && !(PERLDB_SUB && cv == GvCV(PL_DBsub)))
2812 sub_crush_depth(cv);
77a005ab 2813#if 0
bf49b057 2814 DEBUG_S(PerlIO_printf(Perl_debug_log,
6c9570dc 2815 "%p entersub returning %p\n", (void*)thr, (void*)CvSTART(cv)));
77a005ab 2816#endif
a0d0e21e
LW
2817 RETURNOP(CvSTART(cv));
2818 }
f1025168 2819 else {
3a76ca88 2820 I32 markix = TOPMARK;
f1025168 2821
3a76ca88 2822 PUTBACK;
f1025168 2823
3a76ca88
RGS
2824 if (!hasargs) {
2825 /* Need to copy @_ to stack. Alternative may be to
2826 * switch stack to @_, and copy return values
2827 * back. This would allow popping @_ in XSUB, e.g.. XXXX */
2828 AV * const av = GvAV(PL_defgv);
2829 const I32 items = AvFILLp(av) + 1; /* @_ is not tieable */
2830
2831 if (items) {
2832 /* Mark is at the end of the stack. */
2833 EXTEND(SP, items);
2834 Copy(AvARRAY(av), SP + 1, items, SV*);
2835 SP += items;
2836 PUTBACK ;
2837 }
2838 }
2839 /* We assume first XSUB in &DB::sub is the called one. */
2840 if (PL_curcopdb) {
2841 SAVEVPTR(PL_curcop);
2842 PL_curcop = PL_curcopdb;
2843 PL_curcopdb = NULL;
2844 }
2845 /* Do we need to open block here? XXXX */
2846 if (CvXSUB(cv)) /* XXX this is supposed to be true */
2847 (void)(*CvXSUB(cv))(aTHX_ cv);
2848
2849 /* Enforce some sanity in scalar context. */
2850 if (gimme == G_SCALAR && ++markix != PL_stack_sp - PL_stack_base ) {
2851 if (markix > PL_stack_sp - PL_stack_base)
2852 *(PL_stack_base + markix) = &PL_sv_undef;
2853 else
2854 *(PL_stack_base + markix) = *PL_stack_sp;
2855 PL_stack_sp = PL_stack_base + markix;
2856 }
f1025168
NC
2857 LEAVE;
2858 return NORMAL;
2859 }
a0d0e21e
LW
2860}
2861
44a8e56a 2862void
864dbfa3 2863Perl_sub_crush_depth(pTHX_ CV *cv)
44a8e56a
PP
2864{
2865 if (CvANON(cv))
9014280d 2866 Perl_warner(aTHX_ packWARN(WARN_RECURSION), "Deep recursion on anonymous subroutine");
44a8e56a 2867 else {
aec46f14 2868 SV* const tmpstr = sv_newmortal();
6136c704 2869 gv_efullname3(tmpstr, CvGV(cv), NULL);
35c1215d 2870 Perl_warner(aTHX_ packWARN(WARN_RECURSION), "Deep recursion on subroutine \"%"SVf"\"",
be2597df 2871 SVfARG(tmpstr));
44a8e56a
PP
2872 }
2873}
2874
a0d0e21e
LW
2875PP(pp_aelem)
2876{
97aff369 2877 dVAR; dSP;
a0d0e21e 2878 SV** svp;
a3b680e6 2879 SV* const elemsv = POPs;
d804643f 2880 IV elem = SvIV(elemsv);
0bcc34c2 2881 AV* const av = (AV*)POPs;
e1ec3a88
AL
2882 const U32 lval = PL_op->op_flags & OPf_MOD || LVRET;
2883 const U32 defer = (PL_op->op_private & OPpLVAL_DEFER) && (elem > av_len(av));
be6c24e0 2884 SV *sv;
a0d0e21e 2885
e35c1634 2886 if (SvROK(elemsv) && !SvGAMAGIC(elemsv) && ckWARN(WARN_MISC))
95b63a38
JH
2887 Perl_warner(aTHX_ packWARN(WARN_MISC),
2888 "Use of reference \"%"SVf"\" as array index",
be2597df 2889 SVfARG(elemsv));
748a9306 2890 if (elem > 0)
fc15ae8f 2891 elem -= CopARYBASE_get(PL_curcop);
a0d0e21e
LW
2892 if (SvTYPE(av) != SVt_PVAV)
2893 RETPUSHUNDEF;
68dc0745 2894 svp = av_fetch(av, elem, lval && !defer);
a0d0e21e 2895 if (lval) {
2b573ace 2896#ifdef PERL_MALLOC_WRAP
2b573ace 2897 if (SvUOK(elemsv)) {
a9c4fd4e 2898 const UV uv = SvUV(elemsv);
2b573ace
JH
2899 elem = uv > IV_MAX ? IV_MAX : uv;
2900 }
2901 else if (SvNOK(elemsv))
2902 elem = (IV)SvNV(elemsv);
a3b680e6
AL
2903 if (elem > 0) {
2904 static const char oom_array_extend[] =
2905 "Out of memory during array extend"; /* Duplicated in av.c */
2b573ace 2906 MEM_WRAP_CHECK_1(elem,SV*,oom_array_extend);
a3b680e6 2907 }
2b573ace 2908#endif
3280af22 2909 if (!svp || *svp == &PL_sv_undef) {
68dc0745
PP
2910 SV* lv;
2911 if (!defer)
cea2e8a9 2912 DIE(aTHX_ PL_no_aelem, elem);
68dc0745
PP
2913 lv = sv_newmortal();
2914 sv_upgrade(lv, SVt_PVLV);
2915 LvTYPE(lv) = 'y';
a0714e2c 2916 sv_magic(lv, NULL, PERL_MAGIC_defelem, NULL, 0);
b37c2d43 2917 LvTARG(lv) = SvREFCNT_inc_simple(av);
68dc0745
PP
2918 LvTARGOFF(lv) = elem;
2919 LvTARGLEN(lv) = 1;
2920 PUSHs(lv);
2921 RETURN;
2922 }
bfc4de9f 2923 if (PL_op->op_private & OPpLVAL_INTRO)
161b7d16 2924 save_aelem(av, elem, svp);
533c011a
NIS
2925 else if (PL_op->op_private & OPpDEREF)
2926 vivify_ref(*svp, PL_op->op_private & OPpDEREF);
a0d0e21e 2927 }
3280af22 2928 sv = (svp ? *svp : &PL_sv_undef);
be6c24e0
GS
2929 if (!lval && SvGMAGICAL(sv)) /* see note in pp_helem() */
2930 sv = sv_mortalcopy(sv);
2931 PUSHs(sv);
a0d0e21e
LW
2932 RETURN;
2933}
2934
02a9e968 2935void
864dbfa3 2936Perl_vivify_ref(pTHX_ SV *sv, U32 to_what)
02a9e968 2937{
5b295bef 2938 SvGETMAGIC(sv);
02a9e968
CS
2939 if (!SvOK(sv)) {
2940 if (SvREADONLY(sv))
cea2e8a9 2941 Perl_croak(aTHX_ PL_no_modify);
5f05dabc
PP
2942 if (SvTYPE(sv) < SVt_RV)
2943 sv_upgrade(sv, SVt_RV);
2944 else if (SvTYPE(sv) >= SVt_PV) {
8bd4d4c5 2945 SvPV_free(sv);
b162af07
SP
2946 SvLEN_set(sv, 0);
2947 SvCUR_set(sv, 0);
5f05dabc 2948 }
68dc0745 2949 switch (to_what) {
5f05dabc 2950 case OPpDEREF_SV:
561b68a9 2951 SvRV_set(sv, newSV(0));
5f05dabc
PP
2952 break;
2953 case OPpDEREF_AV:
b162af07 2954 SvRV_set(sv, (SV*)newAV());
5f05dabc
PP
2955 break;
2956 case OPpDEREF_HV:
b162af07 2957 SvRV_set(sv, (SV*)newHV());
5f05dabc
PP
2958 break;
2959 }
02a9e968
CS
2960 SvROK_on(sv);
2961 SvSETMAGIC(sv);
2962 }
2963}
2964
a0d0e21e
LW
2965PP(pp_method)
2966{
97aff369 2967 dVAR; dSP;
890ce7af 2968 SV* const sv = TOPs;
f5d5a27c
CS
2969
2970 if (SvROK(sv)) {
890ce7af 2971 SV* const rsv = SvRV(sv);
f5d5a27c
CS
2972 if (SvTYPE(rsv) == SVt_PVCV) {
2973 SETs(rsv);
2974 RETURN;
2975 }
2976 }
2977
4608196e 2978 SETs(method_common(sv, NULL));
f5d5a27c
CS
2979 RETURN;
2980}
2981
2982PP(pp_method_named)
2983{
97aff369 2984 dVAR; dSP;
890ce7af 2985 SV* const sv = cSVOP_sv;
c158a4fd 2986 U32 hash = SvSHARED_HASH(sv);
f5d5a27c
CS
2987
2988 XPUSHs(method_common(sv, &hash));
2989 RETURN;
2990}
2991
2992STATIC SV *
2993S_method_common(pTHX_ SV* meth, U32* hashp)
2994{
97aff369 2995 dVAR;
a0d0e21e
LW
2996 SV* ob;
2997 GV* gv;
56304f61 2998 HV* stash;
f5d5a27c 2999 STRLEN namelen;
6136c704 3000 const char* packname = NULL;
a0714e2c 3001 SV *packsv = NULL;
ac91690f 3002 STRLEN packlen;
46c461b5
AL
3003 const char * const name = SvPV_const(meth, namelen);
3004 SV * const sv = *(PL_stack_base + TOPMARK + 1);
f5d5a27c 3005
4f1b7578
SC
3006 if (!sv)
3007 Perl_croak(aTHX_ "Can't call method \"%s\" on an undefined value", name);
3008
5b295bef 3009 SvGETMAGIC(sv);
a0d0e21e 3010 if (SvROK(sv))
16d20bd9 3011 ob = (SV*)SvRV(sv);
a0d0e21e
LW
3012 else {
3013 GV* iogv;
a0d0e21e 3014
af09ea45 3015 /* this isn't a reference */
5c144d81 3016 if(SvOK(sv) && (packname = SvPV_const(sv, packlen))) {
b464bac0 3017 const HE* const he = hv_fetch_ent(PL_stashcache, sv, 0, 0);
081fc587 3018 if (he) {
5e6396ae 3019 stash = INT2PTR(HV*,SvIV(HeVAL(he)));
081fc587
AB
3020 goto fetch;
3021 }
3022 }
3023
a0d0e21e 3024 if (!SvOK(sv) ||
05f5af9a 3025 !(packname) ||
f776e3cd 3026 !(iogv = gv_fetchsv(sv, 0, SVt_PVIO)) ||
a0d0e21e
LW
3027 !(ob=(SV*)GvIO(iogv)))
3028 {
af09ea45 3029 /* this isn't the name of a filehandle either */
1c846c1f 3030 if (!packname ||
fd400ab9 3031 ((UTF8_IS_START(*packname) && DO_UTF8(sv))
b86a2fa7 3032 ? !isIDFIRST_utf8((U8*)packname)
834a4ddd
LW
3033 : !isIDFIRST(*packname)
3034 ))
3035 {
f5d5a27c
CS
3036 Perl_croak(aTHX_ "Can't call method \"%s\" %s", name,
3037 SvOK(sv) ? "without a package or object reference"
3038 : "on an undefined value");
834a4ddd 3039 }
af09ea45 3040 /* assume it's a package name */
da51bb9b 3041 stash = gv_stashpvn(packname, packlen, 0);
0dae17bd
GS
3042 if (!stash)
3043 packsv = sv;
081fc587 3044 else {
d4c19fe8 3045 SV* const ref = newSViv(PTR2IV(stash));
04fe65b0 3046 (void)hv_store(PL_stashcache, packname, packlen, ref, 0);
7e8961ec 3047 }
ac91690f 3048 goto fetch;
a0d0e21e 3049 }
af09ea45 3050 /* it _is_ a filehandle name -- replace with a reference */
3280af22 3051 *(PL_stack_base + TOPMARK + 1) = sv_2mortal(newRV((SV*)iogv));
a0d0e21e
LW
3052 }
3053
af09ea45 3054 /* if we got here, ob should be a reference or a glob */
f0d43078
GS
3055 if (!ob || !(SvOBJECT(ob)
3056 || (SvTYPE(ob) == SVt_PVGV && (ob = (SV*)GvIO((GV*)ob))
3057 && SvOBJECT(ob))))
3058 {
f5d5a27c 3059 Perl_croak(aTHX_ "Can't call method \"%s\" on unblessed reference",
59e7186f 3060 (SvSCREAM(meth) && strEQ(name,"isa")) ? "DOES" :
f5d5a27c 3061 name);
f0d43078 3062 }
a0d0e21e 3063
56304f61 3064 stash = SvSTASH(ob);
a0d0e21e 3065
ac91690f 3066 fetch:
af09ea45
IK
3067 /* NOTE: stash may be null, hope hv_fetch_ent and
3068 gv_fetchmethod can cope (it seems they can) */
3069
f5d5a27c
CS
3070 /* shortcut for simple names */
3071 if (hashp) {
b464bac0 3072 const HE* const he = hv_fetch_ent(stash, meth, 0, *hashp);
f5d5a27c
CS
3073 if (he) {
3074 gv = (GV*)HeVAL(he);
3075 if (isGV(gv) && GvCV(gv) &&
e1a479c5 3076 (!GvCVGEN(gv) || GvCVGEN(gv)
dd69841b 3077 == (PL_sub_generation + HvMROMETA(stash)->cache_gen)))
f5d5a27c
CS
3078 return (SV*)GvCV(gv);
3079 }
3080 }
3081
0dae17bd 3082 gv = gv_fetchmethod(stash ? stash : (HV*)packsv, name);
af09ea45 3083
56304f61 3084 if (!gv) {
af09ea45
IK
3085 /* This code tries to figure out just what went wrong with
3086 gv_fetchmethod. It therefore needs to duplicate a lot of
3087 the internals of that function. We can't move it inside
3088 Perl_gv_fetchmethod_autoload(), however, since that would
3089 cause UNIVERSAL->can("NoSuchPackage::foo") to croak, and we
3090 don't want that.
3091 */
a9c4fd4e 3092 const char* leaf = name;
6136c704 3093 const char* sep = NULL;
a9c4fd4e 3094 const char* p;
56304f61
CS
3095
3096 for (p = name; *p; p++) {
3097 if (*p == '\'')
3098 sep = p, leaf = p + 1;
3099 else if (*p == ':' && *(p + 1) == ':')
3100 sep = p, leaf = p + 2;
3101 }
3102 if (!sep || ((sep - name) == 5 && strnEQ(name, "SUPER", 5))) {
9b9d0b15 3103 /* the method name is unqualified or starts with SUPER:: */
8e3a4a30
NC
3104#ifndef USE_ITHREADS
3105 if (sep)
3106 stash = CopSTASH(PL_curcop);
3107#else
9b9d0b15
NC
3108 bool need_strlen = 1;
3109 if (sep) {
3110 packname = CopSTASHPV(PL_curcop);
3111 }
8e3a4a30
NC
3112 else
3113#endif
3114 if (stash) {
46c461b5 3115 HEK * const packhek = HvNAME_HEK(stash);
9b9d0b15
NC
3116 if (packhek) {
3117 packname = HEK_KEY(packhek);
3118 packlen = HEK_LEN(packhek);
8e3a4a30 3119#ifdef USE_ITHREADS
9b9d0b15 3120 need_strlen = 0;
8e3a4a30 3121#endif
9b9d0b15
NC
3122 } else {
3123 goto croak;
3124 }
3125 }
3126
3127 if (!packname) {
3128 croak:
e27ad1f2
AV
3129 Perl_croak(aTHX_
3130 "Can't use anonymous symbol table for method lookup");
9b9d0b15 3131 }
8e3a4a30
NC
3132#ifdef USE_ITHREADS
3133 if (need_strlen)
e27ad1f2 3134 packlen = strlen(packname);
8e3a4a30 3135#endif
9b9d0b15 3136
56304f61
CS
3137 }
3138 else {
af09ea45 3139 /* the method name is qualified */
56304f61
CS
3140 packname = name;
3141 packlen = sep - name;
3142 }
af09ea45
IK
3143
3144 /* we're relying on gv_fetchmethod not autovivifying the stash */
da51bb9b 3145 if (gv_stashpvn(packname, packlen, 0)) {
c1899e02 3146 Perl_croak(aTHX_
af09ea45
IK
3147 "Can't locate object method \"%s\" via package \"%.*s\"",
3148 leaf, (int)packlen, packname);
c1899e02
GS
3149 }
3150 else {
3151 Perl_croak(aTHX_
af09ea45
IK
3152 "Can't locate object method \"%s\" via package \"%.*s\""
3153 " (perhaps you forgot to load \"%.*s\"?)",
3154 leaf, (int)packlen, packname, (int)packlen, packname);
c1899e02 3155 }
56304f61 3156 }
f5d5a27c 3157 return isGV(gv) ? (SV*)GvCV(gv) : (SV*)gv;
a0d0e21e 3158}
241d1a3b
NC
3159
3160/*
3161 * Local variables:
3162 * c-indentation-style: bsd
3163 * c-basic-offset: 4
3164 * indent-tabs-mode: t
3165 * End:
3166 *
37442d52
RGS
3167 * ex: set ts=8 sts=4 sw=4 noet:
3168 */