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[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;
1d7c1841 42 XPUSHs(cSVOP_sv);
a0d0e21e
LW
43 RETURN;
44}
45
46PP(pp_nextstate)
47{
97aff369 48 dVAR;
533c011a 49 PL_curcop = (COP*)PL_op;
a0d0e21e 50 TAINT_NOT; /* Each statement is presumed innocent */
3280af22 51 PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
a0d0e21e
LW
52 FREETMPS;
53 return NORMAL;
54}
55
56PP(pp_gvsv)
57{
97aff369 58 dVAR;
39644a26 59 dSP;
924508f0 60 EXTEND(SP,1);
533c011a 61 if (PL_op->op_private & OPpLVAL_INTRO)
1d7c1841 62 PUSHs(save_scalar(cGVOP_gv));
a0d0e21e 63 else
c69033f2 64 PUSHs(GvSVn(cGVOP_gv));
a0d0e21e
LW
65 RETURN;
66}
67
68PP(pp_null)
69{
97aff369 70 dVAR;
a0d0e21e
LW
71 return NORMAL;
72}
73
7399586d
HS
74PP(pp_setstate)
75{
97aff369 76 dVAR;
7399586d
HS
77 PL_curcop = (COP*)PL_op;
78 return NORMAL;
79}
80
a0d0e21e
LW
81PP(pp_pushmark)
82{
97aff369 83 dVAR;
3280af22 84 PUSHMARK(PL_stack_sp);
a0d0e21e
LW
85 return NORMAL;
86}
87
88PP(pp_stringify)
89{
97aff369 90 dVAR; dSP; dTARGET;
6050d10e 91 sv_copypv(TARG,TOPs);
a0d0e21e
LW
92 SETTARG;
93 RETURN;
94}
95
96PP(pp_gv)
97{
97aff369 98 dVAR; dSP;
1d7c1841 99 XPUSHs((SV*)cGVOP_gv);
a0d0e21e
LW
100 RETURN;
101}
102
103PP(pp_and)
104{
97aff369 105 dVAR; dSP;
a0d0e21e
LW
106 if (!SvTRUE(TOPs))
107 RETURN;
108 else {
c960fc3b
SP
109 if (PL_op->op_type == OP_AND)
110 --SP;
a0d0e21e
LW
111 RETURNOP(cLOGOP->op_other);
112 }
113}
114
115PP(pp_sassign)
116{
97aff369 117 dVAR; dSP; dPOPTOPssrl;
748a9306 118
533c011a 119 if (PL_op->op_private & OPpASSIGN_BACKWARDS) {
0bd48802
AL
120 SV * const temp = left;
121 left = right; right = temp;
a0d0e21e 122 }
952306ac
RGS
123 else if (PL_op->op_private & OPpASSIGN_STATE) {
124 if (SvPADSTALE(right))
125 SvPADSTALE_off(right);
126 else
127 RETURN; /* ignore assignment */
128 }
3280af22 129 if (PL_tainting && PL_tainted && !SvTAINTED(left))
a0d0e21e 130 TAINT_NOT;
e26df76a 131 if (PL_op->op_private & OPpASSIGN_CV_TO_GV) {
6136c704 132 SV * const cv = SvRV(left);
e26df76a
NC
133 const U32 cv_type = SvTYPE(cv);
134 const U32 gv_type = SvTYPE(right);
6136c704 135 const bool got_coderef = cv_type == SVt_PVCV || cv_type == SVt_PVFM;
e26df76a
NC
136
137 if (!got_coderef) {
138 assert(SvROK(cv));
139 }
140
ae6d515f 141 /* Can do the optimisation if right (LVALUE) is not a typeglob,
e26df76a
NC
142 left (RVALUE) is a reference to something, and we're in void
143 context. */
144 if (!got_coderef && gv_type != SVt_PVGV && GIMME_V == G_VOID) {
145 /* Is the target symbol table currently empty? */
6136c704 146 GV * const gv = gv_fetchsv(right, GV_NOINIT, SVt_PVGV);
bb112e5a 147 if (SvTYPE(gv) != SVt_PVGV && !SvOK(gv)) {
e26df76a
NC
148 /* Good. Create a new proxy constant subroutine in the target.
149 The gv becomes a(nother) reference to the constant. */
150 SV *const value = SvRV(cv);
151
152 SvUPGRADE((SV *)gv, SVt_RV);
1ccdb730 153 SvPCS_IMPORTED_on(gv);
e26df76a 154 SvRV_set(gv, value);
b37c2d43 155 SvREFCNT_inc_simple_void(value);
e26df76a
NC
156 SETs(right);
157 RETURN;
158 }
159 }
160
161 /* Need to fix things up. */
162 if (gv_type != SVt_PVGV) {
163 /* Need to fix GV. */
164 right = (SV*)gv_fetchsv(right, GV_ADD, SVt_PVGV);
165 }
166
167 if (!got_coderef) {
168 /* We've been returned a constant rather than a full subroutine,
169 but they expect a subroutine reference to apply. */
170 ENTER;
b37c2d43 171 SvREFCNT_inc_void(SvRV(cv));
e26df76a
NC
172 /* newCONSTSUB takes a reference count on the passed in SV
173 from us. We set the name to NULL, otherwise we get into
174 all sorts of fun as the reference to our new sub is
175 donated to the GV that we're about to assign to.
176 */
177 SvRV_set(left, (SV *)newCONSTSUB(GvSTASH(right), NULL,
178 SvRV(cv)));
179 SvREFCNT_dec(cv);
180 LEAVE;
e26df76a
NC
181 }
182
ae6d515f
RGS
183 if (strEQ(GvNAME(right),"isa")) {
184 GvCVGEN(right) = 0;
185 ++PL_sub_generation;
186 }
e26df76a 187 }
54310121 188 SvSetMagicSV(right, left);
a0d0e21e
LW
189 SETs(right);
190 RETURN;
191}
192
193PP(pp_cond_expr)
194{
97aff369 195 dVAR; dSP;
a0d0e21e 196 if (SvTRUEx(POPs))
1a67a97c 197 RETURNOP(cLOGOP->op_other);
a0d0e21e 198 else
1a67a97c 199 RETURNOP(cLOGOP->op_next);
a0d0e21e
LW
200}
201
202PP(pp_unstack)
203{
97aff369 204 dVAR;
a0d0e21e
LW
205 I32 oldsave;
206 TAINT_NOT; /* Each statement is presumed innocent */
3280af22 207 PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
a0d0e21e 208 FREETMPS;
3280af22 209 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e
LW
210 LEAVE_SCOPE(oldsave);
211 return NORMAL;
212}
213
a0d0e21e
LW
214PP(pp_concat)
215{
97aff369 216 dVAR; dSP; dATARGET; tryAMAGICbin(concat,opASSIGN);
748a9306
LW
217 {
218 dPOPTOPssrl;
8d6d96c1
HS
219 bool lbyte;
220 STRLEN rlen;
d4c19fe8 221 const char *rpv = NULL;
a6b599c7 222 bool rbyte = FALSE;
a9c4fd4e 223 bool rcopied = FALSE;
8d6d96c1
HS
224
225 if (TARG == right && right != left) {
c75ab21a
RH
226 /* mg_get(right) may happen here ... */
227 rpv = SvPV_const(right, rlen);
228 rbyte = !DO_UTF8(right);
8d6d96c1 229 right = sv_2mortal(newSVpvn(rpv, rlen));
349d4f2f 230 rpv = SvPV_const(right, rlen); /* no point setting UTF-8 here */
db79b45b 231 rcopied = TRUE;
8d6d96c1 232 }
7889fe52 233
8d6d96c1 234 if (TARG != left) {
a9c4fd4e 235 STRLEN llen;
5c144d81 236 const char* const lpv = SvPV_const(left, llen); /* mg_get(left) may happen here */
90f5826e 237 lbyte = !DO_UTF8(left);
8d6d96c1
HS
238 sv_setpvn(TARG, lpv, llen);
239 if (!lbyte)
240 SvUTF8_on(TARG);
241 else
242 SvUTF8_off(TARG);
243 }
244 else { /* TARG == left */
a9c4fd4e 245 STRLEN llen;
5b295bef 246 SvGETMAGIC(left); /* or mg_get(left) may happen here */
c75ab21a
RH
247 if (!SvOK(TARG)) {
248 if (left == right && ckWARN(WARN_UNINITIALIZED))
249 report_uninit(right);
c69006e4 250 sv_setpvn(left, "", 0);
c75ab21a 251 }
10516c54 252 (void)SvPV_nomg_const(left, llen); /* Needed to set UTF8 flag */
90f5826e
ST
253 lbyte = !DO_UTF8(left);
254 if (IN_BYTES)
255 SvUTF8_off(TARG);
8d6d96c1 256 }
a12c0f56 257
c75ab21a
RH
258 /* or mg_get(right) may happen here */
259 if (!rcopied) {
260 rpv = SvPV_const(right, rlen);
261 rbyte = !DO_UTF8(right);
262 }
8d6d96c1
HS
263 if (lbyte != rbyte) {
264 if (lbyte)
265 sv_utf8_upgrade_nomg(TARG);
266 else {
db79b45b
JH
267 if (!rcopied)
268 right = sv_2mortal(newSVpvn(rpv, rlen));
8d6d96c1 269 sv_utf8_upgrade_nomg(right);
349d4f2f 270 rpv = SvPV_const(right, rlen);
69b47968 271 }
a0d0e21e 272 }
8d6d96c1 273 sv_catpvn_nomg(TARG, rpv, rlen);
43ebc500 274
a0d0e21e
LW
275 SETTARG;
276 RETURN;
748a9306 277 }
a0d0e21e
LW
278}
279
280PP(pp_padsv)
281{
97aff369 282 dVAR; dSP; dTARGET;
a0d0e21e 283 XPUSHs(TARG);
533c011a
NIS
284 if (PL_op->op_flags & OPf_MOD) {
285 if (PL_op->op_private & OPpLVAL_INTRO)
952306ac
RGS
286 if (!(PL_op->op_private & OPpPAD_STATE))
287 SAVECLEARSV(PAD_SVl(PL_op->op_targ));
a62b51b8 288 if (PL_op->op_private & OPpDEREF) {
8ec5e241 289 PUTBACK;
dd2155a4 290 vivify_ref(PAD_SVl(PL_op->op_targ), PL_op->op_private & OPpDEREF);
8ec5e241
NIS
291 SPAGAIN;
292 }
4633a7c4 293 }
a0d0e21e
LW
294 RETURN;
295}
296
297PP(pp_readline)
298{
97aff369 299 dVAR;
f5284f61 300 tryAMAGICunTARGET(iter, 0);
3280af22 301 PL_last_in_gv = (GV*)(*PL_stack_sp--);
8efb3254 302 if (SvTYPE(PL_last_in_gv) != SVt_PVGV) {
1c846c1f 303 if (SvROK(PL_last_in_gv) && SvTYPE(SvRV(PL_last_in_gv)) == SVt_PVGV)
f5284f61 304 PL_last_in_gv = (GV*)SvRV(PL_last_in_gv);
8efb3254 305 else {
f5284f61
IZ
306 dSP;
307 XPUSHs((SV*)PL_last_in_gv);
308 PUTBACK;
cea2e8a9 309 pp_rv2gv();
f5284f61 310 PL_last_in_gv = (GV*)(*PL_stack_sp--);
f5284f61
IZ
311 }
312 }
a0d0e21e
LW
313 return do_readline();
314}
315
316PP(pp_eq)
317{
97aff369 318 dVAR; dSP; tryAMAGICbinSET(eq,0);
4c9fe80f 319#ifndef NV_PRESERVES_UV
0bdaccee 320 if (SvROK(TOPs) && !SvAMAGIC(TOPs) && SvROK(TOPm1s) && !SvAMAGIC(TOPm1s)) {
e61d22ef
NC
321 SP--;
322 SETs(boolSV(SvRV(TOPs) == SvRV(TOPp1s)));
4c9fe80f
AS
323 RETURN;
324 }
325#endif
28e5dec8
JH
326#ifdef PERL_PRESERVE_IVUV
327 SvIV_please(TOPs);
328 if (SvIOK(TOPs)) {
4c9fe80f
AS
329 /* Unless the left argument is integer in range we are going
330 to have to use NV maths. Hence only attempt to coerce the
331 right argument if we know the left is integer. */
28e5dec8
JH
332 SvIV_please(TOPm1s);
333 if (SvIOK(TOPm1s)) {
0bd48802
AL
334 const bool auvok = SvUOK(TOPm1s);
335 const bool buvok = SvUOK(TOPs);
a12c0f56 336
1605159e
NC
337 if (auvok == buvok) { /* ## IV == IV or UV == UV ## */
338 /* Casting IV to UV before comparison isn't going to matter
339 on 2s complement. On 1s complement or sign&magnitude
340 (if we have any of them) it could to make negative zero
341 differ from normal zero. As I understand it. (Need to
342 check - is negative zero implementation defined behaviour
343 anyway?). NWC */
0bd48802
AL
344 const UV buv = SvUVX(POPs);
345 const UV auv = SvUVX(TOPs);
28e5dec8 346
28e5dec8
JH
347 SETs(boolSV(auv == buv));
348 RETURN;
349 }
350 { /* ## Mixed IV,UV ## */
1605159e 351 SV *ivp, *uvp;
28e5dec8 352 IV iv;
28e5dec8 353
1605159e 354 /* == is commutative so doesn't matter which is left or right */
28e5dec8 355 if (auvok) {
1605159e
NC
356 /* top of stack (b) is the iv */
357 ivp = *SP;
358 uvp = *--SP;
359 } else {
360 uvp = *SP;
361 ivp = *--SP;
362 }
363 iv = SvIVX(ivp);
d4c19fe8 364 if (iv < 0)
1605159e
NC
365 /* As uv is a UV, it's >0, so it cannot be == */
366 SETs(&PL_sv_no);
d4c19fe8
AL
367 else
368 /* we know iv is >= 0 */
369 SETs(boolSV((UV)iv == SvUVX(uvp)));
28e5dec8
JH
370 RETURN;
371 }
372 }
373 }
374#endif
a0d0e21e 375 {
cab190d4
JD
376#if defined(NAN_COMPARE_BROKEN) && defined(Perl_isnan)
377 dPOPTOPnnrl;
378 if (Perl_isnan(left) || Perl_isnan(right))
379 RETSETNO;
380 SETs(boolSV(left == right));
381#else
a0d0e21e 382 dPOPnv;
54310121 383 SETs(boolSV(TOPn == value));
cab190d4 384#endif
a0d0e21e
LW
385 RETURN;
386 }
387}
388
389PP(pp_preinc)
390{
97aff369 391 dVAR; dSP;
f39684df 392 if (SvTYPE(TOPs) >= SVt_PVGV && SvTYPE(TOPs) != SVt_PVLV)
d470f89e 393 DIE(aTHX_ PL_no_modify);
3510b4a1
NC
394 if (!SvREADONLY(TOPs) && SvIOK_notUV(TOPs) && !SvNOK(TOPs) && !SvPOK(TOPs)
395 && SvIVX(TOPs) != IV_MAX)
55497cff 396 {
45977657 397 SvIV_set(TOPs, SvIVX(TOPs) + 1);
55497cff 398 SvFLAGS(TOPs) &= ~(SVp_NOK|SVp_POK);
748a9306 399 }
28e5dec8 400 else /* Do all the PERL_PRESERVE_IVUV conditionals in sv_inc */
748a9306 401 sv_inc(TOPs);
a0d0e21e
LW
402 SvSETMAGIC(TOPs);
403 return NORMAL;
404}
405
406PP(pp_or)
407{
97aff369 408 dVAR; dSP;
a0d0e21e
LW
409 if (SvTRUE(TOPs))
410 RETURN;
411 else {
c960fc3b
SP
412 if (PL_op->op_type == OP_OR)
413 --SP;
a0d0e21e
LW
414 RETURNOP(cLOGOP->op_other);
415 }
416}
417
25a55bd7 418PP(pp_defined)
c963b151 419{
97aff369 420 dVAR; dSP;
6136c704
AL
421 register SV* sv;
422 bool defined;
25a55bd7 423 const int op_type = PL_op->op_type;
ea5195b7 424 const bool is_dor = (op_type == OP_DOR || op_type == OP_DORASSIGN);
c963b151 425
6136c704 426 if (is_dor) {
25a55bd7
SP
427 sv = TOPs;
428 if (!sv || !SvANY(sv)) {
2bd49cfc
NC
429 if (op_type == OP_DOR)
430 --SP;
25a55bd7
SP
431 RETURNOP(cLOGOP->op_other);
432 }
433 } else if (op_type == OP_DEFINED) {
434 sv = POPs;
435 if (!sv || !SvANY(sv))
436 RETPUSHNO;
d9aa96a4 437 } else
52a5c517 438 DIE(aTHX_ "panic: Invalid op (%s) in pp_defined()", OP_NAME(PL_op));
25a55bd7 439
6136c704 440 defined = FALSE;
c963b151
BD
441 switch (SvTYPE(sv)) {
442 case SVt_PVAV:
443 if (AvMAX(sv) >= 0 || SvGMAGICAL(sv) || (SvRMAGICAL(sv) && mg_find(sv, PERL_MAGIC_tied)))
25a55bd7 444 defined = TRUE;
c963b151
BD
445 break;
446 case SVt_PVHV:
447 if (HvARRAY(sv) || SvGMAGICAL(sv) || (SvRMAGICAL(sv) && mg_find(sv, PERL_MAGIC_tied)))
25a55bd7 448 defined = TRUE;
c963b151
BD
449 break;
450 case SVt_PVCV:
451 if (CvROOT(sv) || CvXSUB(sv))
25a55bd7 452 defined = TRUE;
c963b151
BD
453 break;
454 default:
5b295bef 455 SvGETMAGIC(sv);
c963b151 456 if (SvOK(sv))
25a55bd7 457 defined = TRUE;
6136c704 458 break;
c963b151 459 }
6136c704
AL
460
461 if (is_dor) {
c960fc3b
SP
462 if(defined)
463 RETURN;
464 if(op_type == OP_DOR)
465 --SP;
25a55bd7 466 RETURNOP(cLOGOP->op_other);
25a55bd7 467 }
d9aa96a4
SP
468 /* assuming OP_DEFINED */
469 if(defined)
470 RETPUSHYES;
471 RETPUSHNO;
c963b151
BD
472}
473
a0d0e21e
LW
474PP(pp_add)
475{
97aff369 476 dVAR; dSP; dATARGET; bool useleft; tryAMAGICbin(add,opASSIGN);
28e5dec8
JH
477 useleft = USE_LEFT(TOPm1s);
478#ifdef PERL_PRESERVE_IVUV
479 /* We must see if we can perform the addition with integers if possible,
480 as the integer code detects overflow while the NV code doesn't.
481 If either argument hasn't had a numeric conversion yet attempt to get
482 the IV. It's important to do this now, rather than just assuming that
483 it's not IOK as a PV of "9223372036854775806" may not take well to NV
484 addition, and an SV which is NOK, NV=6.0 ought to be coerced to
485 integer in case the second argument is IV=9223372036854775806
486 We can (now) rely on sv_2iv to do the right thing, only setting the
487 public IOK flag if the value in the NV (or PV) slot is truly integer.
488
489 A side effect is that this also aggressively prefers integer maths over
7dca457a
NC
490 fp maths for integer values.
491
a00b5bd3 492 How to detect overflow?
7dca457a
NC
493
494 C 99 section 6.2.6.1 says
495
496 The range of nonnegative values of a signed integer type is a subrange
497 of the corresponding unsigned integer type, and the representation of
498 the same value in each type is the same. A computation involving
499 unsigned operands can never overflow, because a result that cannot be
500 represented by the resulting unsigned integer type is reduced modulo
501 the number that is one greater than the largest value that can be
502 represented by the resulting type.
503
504 (the 9th paragraph)
505
506 which I read as "unsigned ints wrap."
507
508 signed integer overflow seems to be classed as "exception condition"
509
510 If an exceptional condition occurs during the evaluation of an
511 expression (that is, if the result is not mathematically defined or not
512 in the range of representable values for its type), the behavior is
513 undefined.
514
515 (6.5, the 5th paragraph)
516
517 I had assumed that on 2s complement machines signed arithmetic would
518 wrap, hence coded pp_add and pp_subtract on the assumption that
519 everything perl builds on would be happy. After much wailing and
520 gnashing of teeth it would seem that irix64 knows its ANSI spec well,
521 knows that it doesn't need to, and doesn't. Bah. Anyway, the all-
522 unsigned code below is actually shorter than the old code. :-)
523 */
524
28e5dec8
JH
525 SvIV_please(TOPs);
526 if (SvIOK(TOPs)) {
527 /* Unless the left argument is integer in range we are going to have to
528 use NV maths. Hence only attempt to coerce the right argument if
529 we know the left is integer. */
9c5ffd7c
JH
530 register UV auv = 0;
531 bool auvok = FALSE;
7dca457a
NC
532 bool a_valid = 0;
533
28e5dec8 534 if (!useleft) {
7dca457a
NC
535 auv = 0;
536 a_valid = auvok = 1;
537 /* left operand is undef, treat as zero. + 0 is identity,
538 Could SETi or SETu right now, but space optimise by not adding
539 lots of code to speed up what is probably a rarish case. */
540 } else {
541 /* Left operand is defined, so is it IV? */
542 SvIV_please(TOPm1s);
543 if (SvIOK(TOPm1s)) {
544 if ((auvok = SvUOK(TOPm1s)))
545 auv = SvUVX(TOPm1s);
546 else {
a3b680e6 547 register const IV aiv = SvIVX(TOPm1s);
7dca457a
NC
548 if (aiv >= 0) {
549 auv = aiv;
550 auvok = 1; /* Now acting as a sign flag. */
551 } else { /* 2s complement assumption for IV_MIN */
552 auv = (UV)-aiv;
553 }
554 }
555 a_valid = 1;
28e5dec8
JH
556 }
557 }
7dca457a
NC
558 if (a_valid) {
559 bool result_good = 0;
560 UV result;
561 register UV buv;
28e5dec8 562 bool buvok = SvUOK(TOPs);
a00b5bd3 563
7dca457a
NC
564 if (buvok)
565 buv = SvUVX(TOPs);
566 else {
a3b680e6 567 register const IV biv = SvIVX(TOPs);
7dca457a
NC
568 if (biv >= 0) {
569 buv = biv;
570 buvok = 1;
571 } else
572 buv = (UV)-biv;
573 }
574 /* ?uvok if value is >= 0. basically, flagged as UV if it's +ve,
602f51c4 575 else "IV" now, independent of how it came in.
7dca457a
NC
576 if a, b represents positive, A, B negative, a maps to -A etc
577 a + b => (a + b)
578 A + b => -(a - b)
579 a + B => (a - b)
580 A + B => -(a + b)
581 all UV maths. negate result if A negative.
582 add if signs same, subtract if signs differ. */
583
584 if (auvok ^ buvok) {
585 /* Signs differ. */
586 if (auv >= buv) {
587 result = auv - buv;
588 /* Must get smaller */
589 if (result <= auv)
590 result_good = 1;
591 } else {
592 result = buv - auv;
593 if (result <= buv) {
594 /* result really should be -(auv-buv). as its negation
595 of true value, need to swap our result flag */
596 auvok = !auvok;
597 result_good = 1;
28e5dec8
JH
598 }
599 }
7dca457a
NC
600 } else {
601 /* Signs same */
602 result = auv + buv;
603 if (result >= auv)
604 result_good = 1;
605 }
606 if (result_good) {
607 SP--;
608 if (auvok)
28e5dec8 609 SETu( result );
7dca457a
NC
610 else {
611 /* Negate result */
612 if (result <= (UV)IV_MIN)
613 SETi( -(IV)result );
614 else {
615 /* result valid, but out of range for IV. */
616 SETn( -(NV)result );
28e5dec8
JH
617 }
618 }
7dca457a
NC
619 RETURN;
620 } /* Overflow, drop through to NVs. */
28e5dec8
JH
621 }
622 }
623#endif
a0d0e21e 624 {
28e5dec8
JH
625 dPOPnv;
626 if (!useleft) {
627 /* left operand is undef, treat as zero. + 0.0 is identity. */
628 SETn(value);
629 RETURN;
630 }
631 SETn( value + TOPn );
632 RETURN;
a0d0e21e
LW
633 }
634}
635
636PP(pp_aelemfast)
637{
97aff369 638 dVAR; dSP;
c445ea15 639 AV * const av = PL_op->op_flags & OPf_SPECIAL ?
6a077020 640 (AV*)PAD_SV(PL_op->op_targ) : GvAV(cGVOP_gv);
a3b680e6 641 const U32 lval = PL_op->op_flags & OPf_MOD;
0bd48802 642 SV** const svp = av_fetch(av, PL_op->op_private, lval);
3280af22 643 SV *sv = (svp ? *svp : &PL_sv_undef);
6ff81951 644 EXTEND(SP, 1);
be6c24e0
GS
645 if (!lval && SvGMAGICAL(sv)) /* see note in pp_helem() */
646 sv = sv_mortalcopy(sv);
647 PUSHs(sv);
a0d0e21e
LW
648 RETURN;
649}
650
651PP(pp_join)
652{
97aff369 653 dVAR; dSP; dMARK; dTARGET;
a0d0e21e
LW
654 MARK++;
655 do_join(TARG, *MARK, MARK, SP);
656 SP = MARK;
657 SETs(TARG);
658 RETURN;
659}
660
661PP(pp_pushre)
662{
97aff369 663 dVAR; dSP;
44a8e56a
PP
664#ifdef DEBUGGING
665 /*
666 * We ass_u_me that LvTARGOFF() comes first, and that two STRLENs
667 * will be enough to hold an OP*.
668 */
c4420975 669 SV* const sv = sv_newmortal();
44a8e56a
PP
670 sv_upgrade(sv, SVt_PVLV);
671 LvTYPE(sv) = '/';
533c011a 672 Copy(&PL_op, &LvTARGOFF(sv), 1, OP*);
44a8e56a
PP
673 XPUSHs(sv);
674#else
6b88bc9c 675 XPUSHs((SV*)PL_op);
44a8e56a 676#endif
a0d0e21e
LW
677 RETURN;
678}
679
680/* Oversized hot code. */
681
682PP(pp_print)
683{
27da23d5 684 dVAR; dSP; dMARK; dORIGMARK;
a0d0e21e 685 IO *io;
760ac839 686 register PerlIO *fp;
236988e4 687 MAGIC *mg;
0bd48802 688 GV * const gv = (PL_op->op_flags & OPf_STACKED) ? (GV*)*++MARK : PL_defoutgv;
5b468f54
AMS
689
690 if (gv && (io = GvIO(gv))
691 && (mg = SvTIED_mg((SV*)io, PERL_MAGIC_tiedscalar)))
692 {
01bb7c6d 693 had_magic:
68dc0745 694 if (MARK == ORIGMARK) {
1c846c1f 695 /* If using default handle then we need to make space to
a60c0954
NIS
696 * pass object as 1st arg, so move other args up ...
697 */
4352c267 698 MEXTEND(SP, 1);
68dc0745
PP
699 ++MARK;
700 Move(MARK, MARK + 1, (SP - MARK) + 1, SV*);
701 ++SP;
702 }
703 PUSHMARK(MARK - 1);
5b468f54 704 *MARK = SvTIED_obj((SV*)io, mg);
68dc0745 705 PUTBACK;
236988e4 706 ENTER;
864dbfa3 707 call_method("PRINT", G_SCALAR);
236988e4
PP
708 LEAVE;
709 SPAGAIN;
68dc0745
PP
710 MARK = ORIGMARK + 1;
711 *MARK = *SP;
712 SP = MARK;
236988e4
PP
713 RETURN;
714 }
a0d0e21e 715 if (!(io = GvIO(gv))) {
5b468f54
AMS
716 if ((GvEGV(gv)) && (io = GvIO(GvEGV(gv)))
717 && (mg = SvTIED_mg((SV*)io, PERL_MAGIC_tiedscalar)))
01bb7c6d 718 goto had_magic;
2dd78f96
JH
719 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
720 report_evil_fh(gv, io, PL_op->op_type);
93189314 721 SETERRNO(EBADF,RMS_IFI);
a0d0e21e
LW
722 goto just_say_no;
723 }
724 else if (!(fp = IoOFP(io))) {
599cee73 725 if (ckWARN2(WARN_CLOSED, WARN_IO)) {
4c80c0b2
NC
726 if (IoIFP(io))
727 report_evil_fh(gv, io, OP_phoney_INPUT_ONLY);
2dd78f96 728 else if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
bc37a18f 729 report_evil_fh(gv, io, PL_op->op_type);
a0d0e21e 730 }
93189314 731 SETERRNO(EBADF,IoIFP(io)?RMS_FAC:RMS_IFI);
a0d0e21e
LW
732 goto just_say_no;
733 }
734 else {
735 MARK++;
7889fe52 736 if (PL_ofs_sv && SvOK(PL_ofs_sv)) {
a0d0e21e
LW
737 while (MARK <= SP) {
738 if (!do_print(*MARK, fp))
739 break;
740 MARK++;
741 if (MARK <= SP) {
7889fe52 742 if (!do_print(PL_ofs_sv, fp)) { /* $, */
a0d0e21e
LW
743 MARK--;
744 break;
745 }
746 }
747 }
748 }
749 else {
750 while (MARK <= SP) {
751 if (!do_print(*MARK, fp))
752 break;
753 MARK++;
754 }
755 }
756 if (MARK <= SP)
757 goto just_say_no;
758 else {
cfc4a7da
GA
759 if (PL_op->op_type == OP_SAY) {
760 if (PerlIO_write(fp, "\n", 1) == 0 || PerlIO_error(fp))
761 goto just_say_no;
762 }
763 else if (PL_ors_sv && SvOK(PL_ors_sv))
7889fe52 764 if (!do_print(PL_ors_sv, fp)) /* $\ */
a0d0e21e
LW
765 goto just_say_no;
766
767 if (IoFLAGS(io) & IOf_FLUSH)
760ac839 768 if (PerlIO_flush(fp) == EOF)
a0d0e21e
LW
769 goto just_say_no;
770 }
771 }
772 SP = ORIGMARK;
e52fd6f4 773 XPUSHs(&PL_sv_yes);
a0d0e21e
LW
774 RETURN;
775
776 just_say_no:
777 SP = ORIGMARK;
e52fd6f4 778 XPUSHs(&PL_sv_undef);
a0d0e21e
LW
779 RETURN;
780}
781
782PP(pp_rv2av)
783{
97aff369 784 dVAR; dSP; dTOPss;
a0d0e21e
LW
785 AV *av;
786
787 if (SvROK(sv)) {
788 wasref:
f5284f61
IZ
789 tryAMAGICunDEREF(to_av);
790
a0d0e21e
LW
791 av = (AV*)SvRV(sv);
792 if (SvTYPE(av) != SVt_PVAV)
cea2e8a9 793 DIE(aTHX_ "Not an ARRAY reference");
533c011a 794 if (PL_op->op_flags & OPf_REF) {
f5284f61 795 SETs((SV*)av);
a0d0e21e
LW
796 RETURN;
797 }
78f9721b
SM
798 else if (LVRET) {
799 if (GIMME == G_SCALAR)
800 Perl_croak(aTHX_ "Can't return array to lvalue scalar context");
801 SETs((SV*)av);
802 RETURN;
803 }
82d03984
RGS
804 else if (PL_op->op_flags & OPf_MOD
805 && PL_op->op_private & OPpLVAL_INTRO)
806 Perl_croak(aTHX_ PL_no_localize_ref);
a0d0e21e
LW
807 }
808 else {
809 if (SvTYPE(sv) == SVt_PVAV) {
810 av = (AV*)sv;
533c011a 811 if (PL_op->op_flags & OPf_REF) {
f5284f61 812 SETs((SV*)av);
a0d0e21e
LW
813 RETURN;
814 }
78f9721b
SM
815 else if (LVRET) {
816 if (GIMME == G_SCALAR)
817 Perl_croak(aTHX_ "Can't return array to lvalue"
818 " scalar context");
819 SETs((SV*)av);
820 RETURN;
821 }
a0d0e21e
LW
822 }
823 else {
67955e0c 824 GV *gv;
1c846c1f 825
a0d0e21e
LW
826 if (SvTYPE(sv) != SVt_PVGV) {
827 if (SvGMAGICAL(sv)) {
828 mg_get(sv);
829 if (SvROK(sv))
830 goto wasref;
831 }
832 if (!SvOK(sv)) {
533c011a
NIS
833 if (PL_op->op_flags & OPf_REF ||
834 PL_op->op_private & HINT_STRICT_REFS)
cea2e8a9 835 DIE(aTHX_ PL_no_usym, "an ARRAY");
599cee73 836 if (ckWARN(WARN_UNINITIALIZED))
29489e7c 837 report_uninit(sv);
f5284f61 838 if (GIMME == G_ARRAY) {
c2444246 839 (void)POPs;
4633a7c4 840 RETURN;
f5284f61
IZ
841 }
842 RETSETUNDEF;
a0d0e21e 843 }
35cd451c
GS
844 if ((PL_op->op_flags & OPf_SPECIAL) &&
845 !(PL_op->op_flags & OPf_MOD))
846 {
f776e3cd 847 gv = (GV*)gv_fetchsv(sv, 0, SVt_PVAV);
c9d5ac95 848 if (!gv
7a5fd60d 849 && (!is_gv_magical_sv(sv,0)
f776e3cd 850 || !(gv = (GV*)gv_fetchsv(sv, GV_ADD, SVt_PVAV))))
c9d5ac95 851 {
35cd451c 852 RETSETUNDEF;
c9d5ac95 853 }
35cd451c
GS
854 }
855 else {
856 if (PL_op->op_private & HINT_STRICT_REFS)
7a5fd60d 857 DIE(aTHX_ PL_no_symref_sv, sv, "an ARRAY");
f776e3cd 858 gv = (GV*)gv_fetchsv(sv, GV_ADD, SVt_PVAV);
35cd451c
GS
859 }
860 }
861 else {
67955e0c 862 gv = (GV*)sv;
a0d0e21e 863 }
67955e0c 864 av = GvAVn(gv);
533c011a 865 if (PL_op->op_private & OPpLVAL_INTRO)
67955e0c 866 av = save_ary(gv);
533c011a 867 if (PL_op->op_flags & OPf_REF) {
f5284f61 868 SETs((SV*)av);
a0d0e21e
LW
869 RETURN;
870 }
78f9721b
SM
871 else if (LVRET) {
872 if (GIMME == G_SCALAR)
873 Perl_croak(aTHX_ "Can't return array to lvalue"
874 " scalar context");
875 SETs((SV*)av);
876 RETURN;
877 }
a0d0e21e
LW
878 }
879 }
880
881 if (GIMME == G_ARRAY) {
a3b680e6 882 const I32 maxarg = AvFILL(av) + 1;
c2444246 883 (void)POPs; /* XXXX May be optimized away? */
1c846c1f 884 EXTEND(SP, maxarg);
93965878 885 if (SvRMAGICAL(av)) {
1c846c1f 886 U32 i;
eb160463 887 for (i=0; i < (U32)maxarg; i++) {
0bcc34c2 888 SV ** const svp = av_fetch(av, i, FALSE);
547d1dd8
HS
889 /* See note in pp_helem, and bug id #27839 */
890 SP[i+1] = svp
891 ? SvGMAGICAL(*svp) ? sv_mortalcopy(*svp) : *svp
892 : &PL_sv_undef;
93965878 893 }
1c846c1f 894 }
93965878
NIS
895 else {
896 Copy(AvARRAY(av), SP+1, maxarg, SV*);
897 }
a0d0e21e
LW
898 SP += maxarg;
899 }
c754c3d7 900 else if (GIMME_V == G_SCALAR) {
a0d0e21e 901 dTARGET;
a3b680e6 902 const I32 maxarg = AvFILL(av) + 1;
f5284f61 903 SETi(maxarg);
a0d0e21e
LW
904 }
905 RETURN;
906}
907
908PP(pp_rv2hv)
909{
97aff369 910 dVAR; dSP; dTOPss;
a0d0e21e 911 HV *hv;
a3b680e6
AL
912 const I32 gimme = GIMME_V;
913 static const char return_hash_to_lvalue_scalar[] = "Can't return hash to lvalue scalar context";
a0d0e21e
LW
914
915 if (SvROK(sv)) {
916 wasref:
f5284f61
IZ
917 tryAMAGICunDEREF(to_hv);
918
a0d0e21e 919 hv = (HV*)SvRV(sv);
6d822dc4 920 if (SvTYPE(hv) != SVt_PVHV)
cea2e8a9 921 DIE(aTHX_ "Not a HASH reference");
533c011a 922 if (PL_op->op_flags & OPf_REF) {
a0d0e21e
LW
923 SETs((SV*)hv);
924 RETURN;
925 }
78f9721b 926 else if (LVRET) {
be85d344 927 if (gimme != G_ARRAY)
a3b680e6 928 Perl_croak(aTHX_ return_hash_to_lvalue_scalar );
78f9721b
SM
929 SETs((SV*)hv);
930 RETURN;
931 }
82d03984
RGS
932 else if (PL_op->op_flags & OPf_MOD
933 && PL_op->op_private & OPpLVAL_INTRO)
934 Perl_croak(aTHX_ PL_no_localize_ref);
a0d0e21e
LW
935 }
936 else {
6d822dc4 937 if (SvTYPE(sv) == SVt_PVHV) {
a0d0e21e 938 hv = (HV*)sv;
533c011a 939 if (PL_op->op_flags & OPf_REF) {
a0d0e21e
LW
940 SETs((SV*)hv);
941 RETURN;
942 }
78f9721b 943 else if (LVRET) {
be85d344 944 if (gimme != G_ARRAY)
a3b680e6 945 Perl_croak(aTHX_ return_hash_to_lvalue_scalar );
78f9721b
SM
946 SETs((SV*)hv);
947 RETURN;
948 }
a0d0e21e
LW
949 }
950 else {
67955e0c 951 GV *gv;
1c846c1f 952
a0d0e21e
LW
953 if (SvTYPE(sv) != SVt_PVGV) {
954 if (SvGMAGICAL(sv)) {
955 mg_get(sv);
956 if (SvROK(sv))
957 goto wasref;
958 }
959 if (!SvOK(sv)) {
533c011a
NIS
960 if (PL_op->op_flags & OPf_REF ||
961 PL_op->op_private & HINT_STRICT_REFS)
cea2e8a9 962 DIE(aTHX_ PL_no_usym, "a HASH");
599cee73 963 if (ckWARN(WARN_UNINITIALIZED))
29489e7c 964 report_uninit(sv);
be85d344 965 if (gimme == G_ARRAY) {
4633a7c4
LW
966 SP--;
967 RETURN;
968 }
a0d0e21e
LW
969 RETSETUNDEF;
970 }
35cd451c
GS
971 if ((PL_op->op_flags & OPf_SPECIAL) &&
972 !(PL_op->op_flags & OPf_MOD))
973 {
f776e3cd 974 gv = (GV*)gv_fetchsv(sv, 0, SVt_PVHV);
c9d5ac95 975 if (!gv
7a5fd60d 976 && (!is_gv_magical_sv(sv,0)
f776e3cd 977 || !(gv = (GV*)gv_fetchsv(sv, GV_ADD, SVt_PVHV))))
c9d5ac95 978 {
35cd451c 979 RETSETUNDEF;
c9d5ac95 980 }
35cd451c
GS
981 }
982 else {
983 if (PL_op->op_private & HINT_STRICT_REFS)
7a5fd60d 984 DIE(aTHX_ PL_no_symref_sv, sv, "a HASH");
f776e3cd 985 gv = (GV*)gv_fetchsv(sv, GV_ADD, SVt_PVHV);
35cd451c
GS
986 }
987 }
988 else {
67955e0c 989 gv = (GV*)sv;
a0d0e21e 990 }
67955e0c 991 hv = GvHVn(gv);
533c011a 992 if (PL_op->op_private & OPpLVAL_INTRO)
67955e0c 993 hv = save_hash(gv);
533c011a 994 if (PL_op->op_flags & OPf_REF) {
a0d0e21e
LW
995 SETs((SV*)hv);
996 RETURN;
997 }
78f9721b 998 else if (LVRET) {
be85d344 999 if (gimme != G_ARRAY)
a3b680e6 1000 Perl_croak(aTHX_ return_hash_to_lvalue_scalar );
78f9721b
SM
1001 SETs((SV*)hv);
1002 RETURN;
1003 }
a0d0e21e
LW
1004 }
1005 }
1006
be85d344 1007 if (gimme == G_ARRAY) { /* array wanted */
3280af22 1008 *PL_stack_sp = (SV*)hv;
cea2e8a9 1009 return do_kv();
a0d0e21e 1010 }
be85d344 1011 else if (gimme == G_SCALAR) {
a0d0e21e 1012 dTARGET;
243d6ab3 1013 TARG = Perl_hv_scalar(aTHX_ hv);
a0d0e21e 1014 SETTARG;
a0d0e21e 1015 }
be85d344 1016 RETURN;
a0d0e21e
LW
1017}
1018
10c8fecd
GS
1019STATIC void
1020S_do_oddball(pTHX_ HV *hash, SV **relem, SV **firstrelem)
1021{
97aff369 1022 dVAR;
10c8fecd
GS
1023 if (*relem) {
1024 SV *tmpstr;
b464bac0 1025 const HE *didstore;
6d822dc4
MS
1026
1027 if (ckWARN(WARN_MISC)) {
a3b680e6 1028 const char *err;
10c8fecd
GS
1029 if (relem == firstrelem &&
1030 SvROK(*relem) &&
1031 (SvTYPE(SvRV(*relem)) == SVt_PVAV ||
1032 SvTYPE(SvRV(*relem)) == SVt_PVHV))
1033 {
a3b680e6 1034 err = "Reference found where even-sized list expected";
10c8fecd
GS
1035 }
1036 else
a3b680e6
AL
1037 err = "Odd number of elements in hash assignment";
1038 Perl_warner(aTHX_ packWARN(WARN_MISC), err);
10c8fecd 1039 }
6d822dc4 1040
561b68a9 1041 tmpstr = newSV(0);
6d822dc4
MS
1042 didstore = hv_store_ent(hash,*relem,tmpstr,0);
1043 if (SvMAGICAL(hash)) {
1044 if (SvSMAGICAL(tmpstr))
1045 mg_set(tmpstr);
1046 if (!didstore)
1047 sv_2mortal(tmpstr);
1048 }
1049 TAINT_NOT;
10c8fecd
GS
1050 }
1051}
1052
a0d0e21e
LW
1053PP(pp_aassign)
1054{
27da23d5 1055 dVAR; dSP;
3280af22
NIS
1056 SV **lastlelem = PL_stack_sp;
1057 SV **lastrelem = PL_stack_base + POPMARK;
1058 SV **firstrelem = PL_stack_base + POPMARK + 1;
a0d0e21e
LW
1059 SV **firstlelem = lastrelem + 1;
1060
1061 register SV **relem;
1062 register SV **lelem;
1063
1064 register SV *sv;
1065 register AV *ary;
1066
54310121 1067 I32 gimme;
a0d0e21e
LW
1068 HV *hash;
1069 I32 i;
1070 int magic;
ca65944e 1071 int duplicates = 0;
cbbf8932 1072 SV **firsthashrelem = NULL; /* "= 0" keeps gcc 2.95 quiet */
5637b936 1073
a0d0e21e 1074
3280af22 1075 PL_delaymagic = DM_DELAY; /* catch simultaneous items */
ca65944e 1076 gimme = GIMME_V;
a0d0e21e
LW
1077
1078 /* If there's a common identifier on both sides we have to take
1079 * special care that assigning the identifier on the left doesn't
1080 * clobber a value on the right that's used later in the list.
1081 */
10c8fecd 1082 if (PL_op->op_private & (OPpASSIGN_COMMON)) {
cc5e57d2 1083 EXTEND_MORTAL(lastrelem - firstrelem + 1);
10c8fecd 1084 for (relem = firstrelem; relem <= lastrelem; relem++) {
155aba94 1085 if ((sv = *relem)) {
a1f49e72 1086 TAINT_NOT; /* Each item is independent */
10c8fecd 1087 *relem = sv_mortalcopy(sv);
a1f49e72 1088 }
10c8fecd 1089 }
a0d0e21e 1090 }
461824dc
RGS
1091 if (PL_op->op_private & OPpASSIGN_STATE) {
1092 if (SvPADSTALE(*firstlelem))
1093 SvPADSTALE_off(*firstlelem);
1094 else
1095 RETURN; /* ignore assignment */
1096 }
a0d0e21e
LW
1097
1098 relem = firstrelem;
1099 lelem = firstlelem;
4608196e
RGS
1100 ary = NULL;
1101 hash = NULL;
10c8fecd 1102
a0d0e21e 1103 while (lelem <= lastlelem) {
bbce6d69 1104 TAINT_NOT; /* Each item stands on its own, taintwise. */
a0d0e21e
LW
1105 sv = *lelem++;
1106 switch (SvTYPE(sv)) {
1107 case SVt_PVAV:
1108 ary = (AV*)sv;
748a9306 1109 magic = SvMAGICAL(ary) != 0;
a0d0e21e 1110 av_clear(ary);
7e42bd57 1111 av_extend(ary, lastrelem - relem);
a0d0e21e
LW
1112 i = 0;
1113 while (relem <= lastrelem) { /* gobble up all the rest */
5117ca91 1114 SV **didstore;
a0d0e21e 1115 assert(*relem);
f2b990bf 1116 sv = newSVsv(*relem);
a0d0e21e 1117 *(relem++) = sv;
5117ca91
GS
1118 didstore = av_store(ary,i++,sv);
1119 if (magic) {
fb73857a
PP
1120 if (SvSMAGICAL(sv))
1121 mg_set(sv);
5117ca91 1122 if (!didstore)
8127e0e3 1123 sv_2mortal(sv);
5117ca91 1124 }
bbce6d69 1125 TAINT_NOT;
a0d0e21e
LW
1126 }
1127 break;
10c8fecd 1128 case SVt_PVHV: { /* normal hash */
a0d0e21e
LW
1129 SV *tmpstr;
1130
1131 hash = (HV*)sv;
748a9306 1132 magic = SvMAGICAL(hash) != 0;
a0d0e21e 1133 hv_clear(hash);
ca65944e 1134 firsthashrelem = relem;
a0d0e21e
LW
1135
1136 while (relem < lastrelem) { /* gobble up all the rest */
5117ca91 1137 HE *didstore;
6136c704
AL
1138 sv = *relem ? *relem : &PL_sv_no;
1139 relem++;
561b68a9 1140 tmpstr = newSV(0);
a0d0e21e
LW
1141 if (*relem)
1142 sv_setsv(tmpstr,*relem); /* value */
1143 *(relem++) = tmpstr;
ca65944e
RGS
1144 if (gimme != G_VOID && hv_exists_ent(hash, sv, 0))
1145 /* key overwrites an existing entry */
1146 duplicates += 2;
5117ca91
GS
1147 didstore = hv_store_ent(hash,sv,tmpstr,0);
1148 if (magic) {
fb73857a
PP
1149 if (SvSMAGICAL(tmpstr))
1150 mg_set(tmpstr);
5117ca91 1151 if (!didstore)
8127e0e3 1152 sv_2mortal(tmpstr);
5117ca91 1153 }
bbce6d69 1154 TAINT_NOT;
8e07c86e 1155 }
6a0deba8 1156 if (relem == lastrelem) {
10c8fecd 1157 do_oddball(hash, relem, firstrelem);
6a0deba8 1158 relem++;
1930e939 1159 }
a0d0e21e
LW
1160 }
1161 break;
1162 default:
6fc92669
GS
1163 if (SvIMMORTAL(sv)) {
1164 if (relem <= lastrelem)
1165 relem++;
1166 break;
a0d0e21e
LW
1167 }
1168 if (relem <= lastrelem) {
1169 sv_setsv(sv, *relem);
1170 *(relem++) = sv;
1171 }
1172 else
3280af22 1173 sv_setsv(sv, &PL_sv_undef);
a0d0e21e
LW
1174 SvSETMAGIC(sv);
1175 break;
1176 }
1177 }
3280af22
NIS
1178 if (PL_delaymagic & ~DM_DELAY) {
1179 if (PL_delaymagic & DM_UID) {
a0d0e21e 1180#ifdef HAS_SETRESUID
fb934a90
RD
1181 (void)setresuid((PL_delaymagic & DM_RUID) ? PL_uid : (Uid_t)-1,
1182 (PL_delaymagic & DM_EUID) ? PL_euid : (Uid_t)-1,
1183 (Uid_t)-1);
56febc5e
AD
1184#else
1185# ifdef HAS_SETREUID
fb934a90
RD
1186 (void)setreuid((PL_delaymagic & DM_RUID) ? PL_uid : (Uid_t)-1,
1187 (PL_delaymagic & DM_EUID) ? PL_euid : (Uid_t)-1);
56febc5e
AD
1188# else
1189# ifdef HAS_SETRUID
b28d0864
NIS
1190 if ((PL_delaymagic & DM_UID) == DM_RUID) {
1191 (void)setruid(PL_uid);
1192 PL_delaymagic &= ~DM_RUID;
a0d0e21e 1193 }
56febc5e
AD
1194# endif /* HAS_SETRUID */
1195# ifdef HAS_SETEUID
b28d0864 1196 if ((PL_delaymagic & DM_UID) == DM_EUID) {
fb934a90 1197 (void)seteuid(PL_euid);
b28d0864 1198 PL_delaymagic &= ~DM_EUID;
a0d0e21e 1199 }
56febc5e 1200# endif /* HAS_SETEUID */
b28d0864
NIS
1201 if (PL_delaymagic & DM_UID) {
1202 if (PL_uid != PL_euid)
cea2e8a9 1203 DIE(aTHX_ "No setreuid available");
b28d0864 1204 (void)PerlProc_setuid(PL_uid);
a0d0e21e 1205 }
56febc5e
AD
1206# endif /* HAS_SETREUID */
1207#endif /* HAS_SETRESUID */
d8eceb89
JH
1208 PL_uid = PerlProc_getuid();
1209 PL_euid = PerlProc_geteuid();
a0d0e21e 1210 }
3280af22 1211 if (PL_delaymagic & DM_GID) {
a0d0e21e 1212#ifdef HAS_SETRESGID
fb934a90
RD
1213 (void)setresgid((PL_delaymagic & DM_RGID) ? PL_gid : (Gid_t)-1,
1214 (PL_delaymagic & DM_EGID) ? PL_egid : (Gid_t)-1,
1215 (Gid_t)-1);
56febc5e
AD
1216#else
1217# ifdef HAS_SETREGID
fb934a90
RD
1218 (void)setregid((PL_delaymagic & DM_RGID) ? PL_gid : (Gid_t)-1,
1219 (PL_delaymagic & DM_EGID) ? PL_egid : (Gid_t)-1);
56febc5e
AD
1220# else
1221# ifdef HAS_SETRGID
b28d0864
NIS
1222 if ((PL_delaymagic & DM_GID) == DM_RGID) {
1223 (void)setrgid(PL_gid);
1224 PL_delaymagic &= ~DM_RGID;
a0d0e21e 1225 }
56febc5e
AD
1226# endif /* HAS_SETRGID */
1227# ifdef HAS_SETEGID
b28d0864 1228 if ((PL_delaymagic & DM_GID) == DM_EGID) {
fb934a90 1229 (void)setegid(PL_egid);
b28d0864 1230 PL_delaymagic &= ~DM_EGID;
a0d0e21e 1231 }
56febc5e 1232# endif /* HAS_SETEGID */
b28d0864
NIS
1233 if (PL_delaymagic & DM_GID) {
1234 if (PL_gid != PL_egid)
cea2e8a9 1235 DIE(aTHX_ "No setregid available");
b28d0864 1236 (void)PerlProc_setgid(PL_gid);
a0d0e21e 1237 }
56febc5e
AD
1238# endif /* HAS_SETREGID */
1239#endif /* HAS_SETRESGID */
d8eceb89
JH
1240 PL_gid = PerlProc_getgid();
1241 PL_egid = PerlProc_getegid();
a0d0e21e 1242 }
3280af22 1243 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
a0d0e21e 1244 }
3280af22 1245 PL_delaymagic = 0;
54310121 1246
54310121
PP
1247 if (gimme == G_VOID)
1248 SP = firstrelem - 1;
1249 else if (gimme == G_SCALAR) {
1250 dTARGET;
1251 SP = firstrelem;
ca65944e 1252 SETi(lastrelem - firstrelem + 1 - duplicates);
54310121
PP
1253 }
1254 else {
ca65944e 1255 if (ary)
a0d0e21e 1256 SP = lastrelem;
ca65944e
RGS
1257 else if (hash) {
1258 if (duplicates) {
1259 /* Removes from the stack the entries which ended up as
1260 * duplicated keys in the hash (fix for [perl #24380]) */
1261 Move(firsthashrelem + duplicates,
1262 firsthashrelem, duplicates, SV**);
1263 lastrelem -= duplicates;
1264 }
1265 SP = lastrelem;
1266 }
a0d0e21e
LW
1267 else
1268 SP = firstrelem + (lastlelem - firstlelem);
0c8c7a05 1269 lelem = firstlelem + (relem - firstrelem);
5f05dabc 1270 while (relem <= SP)
3280af22 1271 *relem++ = (lelem <= lastlelem) ? *lelem++ : &PL_sv_undef;
a0d0e21e 1272 }
54310121 1273 RETURN;
a0d0e21e
LW
1274}
1275
8782bef2
GB
1276PP(pp_qr)
1277{
97aff369 1278 dVAR; dSP;
c4420975
AL
1279 register PMOP * const pm = cPMOP;
1280 SV * const rv = sv_newmortal();
1281 SV * const sv = newSVrv(rv, "Regexp");
e08e52cf
AMS
1282 if (pm->op_pmdynflags & PMdf_TAINTED)
1283 SvTAINTED_on(rv);
aaa362c4 1284 sv_magic(sv,(SV*)ReREFCNT_inc(PM_GETRE(pm)), PERL_MAGIC_qr,0,0);
8782bef2
GB
1285 RETURNX(PUSHs(rv));
1286}
1287
a0d0e21e
LW
1288PP(pp_match)
1289{
97aff369 1290 dVAR; dSP; dTARG;
a0d0e21e 1291 register PMOP *pm = cPMOP;
d65afb4b 1292 PMOP *dynpm = pm;
0d46e09a
SP
1293 register const char *t;
1294 register const char *s;
5c144d81 1295 const char *strend;
a0d0e21e 1296 I32 global;
f722798b 1297 I32 r_flags = REXEC_CHECKED;
5c144d81 1298 const char *truebase; /* Start of string */
aaa362c4 1299 register REGEXP *rx = PM_GETRE(pm);
b3eb6a9b 1300 bool rxtainted;
a3b680e6 1301 const I32 gimme = GIMME;
a0d0e21e 1302 STRLEN len;
748a9306 1303 I32 minmatch = 0;
a3b680e6 1304 const I32 oldsave = PL_savestack_ix;
f86702cc 1305 I32 update_minmatch = 1;
e60df1fa 1306 I32 had_zerolen = 0;
58e23c8d 1307 U32 gpos = 0;
a0d0e21e 1308
533c011a 1309 if (PL_op->op_flags & OPf_STACKED)
a0d0e21e 1310 TARG = POPs;
59f00321
RGS
1311 else if (PL_op->op_private & OPpTARGET_MY)
1312 GETTARGET;
a0d0e21e 1313 else {
54b9620d 1314 TARG = DEFSV;
a0d0e21e
LW
1315 EXTEND(SP,1);
1316 }
d9f424b2 1317
c277df42 1318 PUTBACK; /* EVAL blocks need stack_sp. */
5c144d81 1319 s = SvPV_const(TARG, len);
a0d0e21e 1320 if (!s)
2269b42e 1321 DIE(aTHX_ "panic: pp_match");
890ce7af 1322 strend = s + len;
b3eb6a9b 1323 rxtainted = ((pm->op_pmdynflags & PMdf_TAINTED) ||
3280af22 1324 (PL_tainted && (pm->op_pmflags & PMf_RETAINT)));
9212bbba 1325 TAINT_NOT;
a0d0e21e 1326
a30b2f1f 1327 RX_MATCH_UTF8_set(rx, DO_UTF8(TARG));
d9f424b2 1328
d65afb4b 1329 /* PMdf_USED is set after a ?? matches once */
48c036b1 1330 if (pm->op_pmdynflags & PMdf_USED) {
c277df42 1331 failure:
a0d0e21e
LW
1332 if (gimme == G_ARRAY)
1333 RETURN;
1334 RETPUSHNO;
1335 }
1336
d65afb4b 1337 /* empty pattern special-cased to use last successful pattern if possible */
3280af22
NIS
1338 if (!rx->prelen && PL_curpm) {
1339 pm = PL_curpm;
aaa362c4 1340 rx = PM_GETRE(pm);
a0d0e21e 1341 }
d65afb4b 1342
eb160463 1343 if (rx->minlen > (I32)len)
d65afb4b 1344 goto failure;
c277df42 1345
a0d0e21e 1346 truebase = t = s;
ad94a511
IZ
1347
1348 /* XXXX What part of this is needed with true \G-support? */
d65afb4b 1349 if ((global = dynpm->op_pmflags & PMf_GLOBAL)) {
cf93c79d 1350 rx->startp[0] = -1;
a0d0e21e 1351 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
c445ea15 1352 MAGIC* const mg = mg_find(TARG, PERL_MAGIC_regex_global);
565764a8 1353 if (mg && mg->mg_len >= 0) {
bbe252da 1354 if (!(rx->extflags & RXf_GPOS_SEEN))
1c846c1f 1355 rx->endp[0] = rx->startp[0] = mg->mg_len;
bbe252da 1356 else if (rx->extflags & RXf_ANCH_GPOS) {
0ef3e39e 1357 r_flags |= REXEC_IGNOREPOS;
1c846c1f 1358 rx->endp[0] = rx->startp[0] = mg->mg_len;
bbe252da 1359 } else if (rx->extflags & RXf_GPOS_FLOAT)
58e23c8d
YO
1360 gpos = mg->mg_len;
1361 else
1362 rx->endp[0] = rx->startp[0] = mg->mg_len;
1363 minmatch = (mg->mg_flags & MGf_MINMATCH) ? rx->gofs + 1 : 0;
f86702cc 1364 update_minmatch = 0;
748a9306 1365 }
a0d0e21e
LW
1366 }
1367 }
58e23c8d
YO
1368 /* remove comment to get faster /g but possibly unsafe $1 vars after a
1369 match. Test for the unsafe vars will fail as well*/
1370 if (( /* !global && */ rx->nparens)
0b78c20a 1371 || SvTEMP(TARG) || PL_sawampersand || (pm->op_pmflags & PMf_EVAL))
14977893 1372 r_flags |= REXEC_COPY_STR;
1c846c1f 1373 if (SvSCREAM(TARG))
22e551b9
IZ
1374 r_flags |= REXEC_SCREAM;
1375
a0d0e21e 1376play_it_again:
cf93c79d 1377 if (global && rx->startp[0] != -1) {
58e23c8d
YO
1378 t = s = rx->endp[0] + truebase - rx->gofs;
1379 if ((s + rx->minlen) > strend || s < truebase)
a0d0e21e 1380 goto nope;
f86702cc 1381 if (update_minmatch++)
e60df1fa 1382 minmatch = had_zerolen;
a0d0e21e 1383 }
bbe252da
YO
1384 if (rx->extflags & RXf_USE_INTUIT &&
1385 DO_UTF8(TARG) == ((rx->extflags & RXf_UTF8) != 0)) {
5c144d81
NC
1386 /* FIXME - can PL_bostr be made const char *? */
1387 PL_bostr = (char *)truebase;
f9f4320a 1388 s = CALLREG_INTUIT_START(rx, TARG, (char *)s, (char *)strend, r_flags, NULL);
f722798b
IZ
1389
1390 if (!s)
1391 goto nope;
bbe252da 1392 if ( (rx->extflags & RXf_CHECK_ALL)
14977893 1393 && !PL_sawampersand
bbe252da
YO
1394 && ((rx->extflags & RXf_NOSCAN)
1395 || !((rx->extflags & RXf_INTUIT_TAIL)
05b4157f
GS
1396 && (r_flags & REXEC_SCREAM)))
1397 && !SvROK(TARG)) /* Cannot trust since INTUIT cannot guess ^ */
f722798b 1398 goto yup;
a0d0e21e 1399 }
70685ca0 1400 if (CALLREGEXEC(rx, (char*)s, (char *)strend, (char*)truebase, minmatch, TARG, INT2PTR(void*, gpos), r_flags))
bbce6d69 1401 {
3280af22 1402 PL_curpm = pm;
d65afb4b
HS
1403 if (dynpm->op_pmflags & PMf_ONCE)
1404 dynpm->op_pmdynflags |= PMdf_USED;
a0d0e21e
LW
1405 goto gotcha;
1406 }
1407 else
1408 goto ret_no;
1409 /*NOTREACHED*/
1410
1411 gotcha:
72311751
GS
1412 if (rxtainted)
1413 RX_MATCH_TAINTED_on(rx);
1414 TAINT_IF(RX_MATCH_TAINTED(rx));
a0d0e21e 1415 if (gimme == G_ARRAY) {
a3b680e6
AL
1416 const I32 nparens = rx->nparens;
1417 I32 i = (global && !nparens) ? 1 : 0;
a0d0e21e 1418
c277df42 1419 SPAGAIN; /* EVAL blocks could move the stack. */
ffc61ed2
JH
1420 EXTEND(SP, nparens + i);
1421 EXTEND_MORTAL(nparens + i);
1422 for (i = !i; i <= nparens; i++) {
a0d0e21e 1423 PUSHs(sv_newmortal());
cf93c79d 1424 if ((rx->startp[i] != -1) && rx->endp[i] != -1 ) {
b464bac0 1425 const I32 len = rx->endp[i] - rx->startp[i];
289555fe 1426 s = rx->startp[i] + truebase;
290deeac
A
1427 if (rx->endp[i] < 0 || rx->startp[i] < 0 ||
1428 len < 0 || len > strend - s)
1429 DIE(aTHX_ "panic: pp_match start/end pointers");
a0d0e21e 1430 sv_setpvn(*SP, s, len);
cce850e4 1431 if (DO_UTF8(TARG) && is_utf8_string((U8*)s, len))
a197cbdd 1432 SvUTF8_on(*SP);
a0d0e21e
LW
1433 }
1434 }
1435 if (global) {
d65afb4b 1436 if (dynpm->op_pmflags & PMf_CONTINUE) {
6136c704 1437 MAGIC* mg = NULL;
0af80b60
HS
1438 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG))
1439 mg = mg_find(TARG, PERL_MAGIC_regex_global);
1440 if (!mg) {
d83f0a82
NC
1441#ifdef PERL_OLD_COPY_ON_WRITE
1442 if (SvIsCOW(TARG))
1443 sv_force_normal_flags(TARG, 0);
1444#endif
1445 mg = sv_magicext(TARG, NULL, PERL_MAGIC_regex_global,
1446 &PL_vtbl_mglob, NULL, 0);
0af80b60
HS
1447 }
1448 if (rx->startp[0] != -1) {
1449 mg->mg_len = rx->endp[0];
70685ca0 1450 if (rx->startp[0] + rx->gofs == (UV)rx->endp[0])
0af80b60
HS
1451 mg->mg_flags |= MGf_MINMATCH;
1452 else
1453 mg->mg_flags &= ~MGf_MINMATCH;
1454 }
1455 }
cf93c79d 1456 had_zerolen = (rx->startp[0] != -1
70685ca0 1457 && rx->startp[0] + rx->gofs == (UV)rx->endp[0]);
c277df42 1458 PUTBACK; /* EVAL blocks may use stack */
cf93c79d 1459 r_flags |= REXEC_IGNOREPOS | REXEC_NOT_FIRST;
a0d0e21e
LW
1460 goto play_it_again;
1461 }
ffc61ed2 1462 else if (!nparens)
bde848c5 1463 XPUSHs(&PL_sv_yes);
4633a7c4 1464 LEAVE_SCOPE(oldsave);
a0d0e21e
LW
1465 RETURN;
1466 }
1467 else {
1468 if (global) {
cbbf8932 1469 MAGIC* mg;
a0d0e21e 1470 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG))
14befaf4 1471 mg = mg_find(TARG, PERL_MAGIC_regex_global);
cbbf8932
AL
1472 else
1473 mg = NULL;
a0d0e21e 1474 if (!mg) {
d83f0a82
NC
1475#ifdef PERL_OLD_COPY_ON_WRITE
1476 if (SvIsCOW(TARG))
1477 sv_force_normal_flags(TARG, 0);
1478#endif
1479 mg = sv_magicext(TARG, NULL, PERL_MAGIC_regex_global,
1480 &PL_vtbl_mglob, NULL, 0);
a0d0e21e 1481 }
cf93c79d
IZ
1482 if (rx->startp[0] != -1) {
1483 mg->mg_len = rx->endp[0];
70685ca0 1484 if (rx->startp[0] + rx->gofs == (UV)rx->endp[0])
748a9306
LW
1485 mg->mg_flags |= MGf_MINMATCH;
1486 else
1487 mg->mg_flags &= ~MGf_MINMATCH;
1488 }
a0d0e21e 1489 }
4633a7c4 1490 LEAVE_SCOPE(oldsave);
a0d0e21e
LW
1491 RETPUSHYES;
1492 }
1493
f722798b 1494yup: /* Confirmed by INTUIT */
72311751
GS
1495 if (rxtainted)
1496 RX_MATCH_TAINTED_on(rx);
1497 TAINT_IF(RX_MATCH_TAINTED(rx));
3280af22 1498 PL_curpm = pm;
d65afb4b
HS
1499 if (dynpm->op_pmflags & PMf_ONCE)
1500 dynpm->op_pmdynflags |= PMdf_USED;
cf93c79d
IZ
1501 if (RX_MATCH_COPIED(rx))
1502 Safefree(rx->subbeg);
1503 RX_MATCH_COPIED_off(rx);
6136c704 1504 rx->subbeg = NULL;
a0d0e21e 1505 if (global) {
5c144d81
NC
1506 /* FIXME - should rx->subbeg be const char *? */
1507 rx->subbeg = (char *) truebase;
cf93c79d 1508 rx->startp[0] = s - truebase;
a30b2f1f 1509 if (RX_MATCH_UTF8(rx)) {
de8c5301 1510 char * const t = (char*)utf8_hop((U8*)s, rx->minlenret);
60aeb6fd
NIS
1511 rx->endp[0] = t - truebase;
1512 }
1513 else {
de8c5301 1514 rx->endp[0] = s - truebase + rx->minlenret;
60aeb6fd 1515 }
cf93c79d 1516 rx->sublen = strend - truebase;
a0d0e21e 1517 goto gotcha;
1c846c1f 1518 }
14977893
JH
1519 if (PL_sawampersand) {
1520 I32 off;
f8c7b90f 1521#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
1522 if (SvIsCOW(TARG) || (SvFLAGS(TARG) & CAN_COW_MASK) == CAN_COW_FLAGS) {
1523 if (DEBUG_C_TEST) {
1524 PerlIO_printf(Perl_debug_log,
1525 "Copy on write: pp_match $& capture, type %d, truebase=%p, t=%p, difference %d\n",
6c9570dc 1526 (int) SvTYPE(TARG), (void*)truebase, (void*)t,
ed252734
NC
1527 (int)(t-truebase));
1528 }
1529 rx->saved_copy = sv_setsv_cow(rx->saved_copy, TARG);
555831ce 1530 rx->subbeg = (char *) SvPVX_const(rx->saved_copy) + (t - truebase);
ed252734
NC
1531 assert (SvPOKp(rx->saved_copy));
1532 } else
1533#endif
1534 {
14977893 1535
ed252734 1536 rx->subbeg = savepvn(t, strend - t);
f8c7b90f 1537#ifdef PERL_OLD_COPY_ON_WRITE
a0714e2c 1538 rx->saved_copy = NULL;
ed252734
NC
1539#endif
1540 }
14977893
JH
1541 rx->sublen = strend - t;
1542 RX_MATCH_COPIED_on(rx);
1543 off = rx->startp[0] = s - t;
de8c5301 1544 rx->endp[0] = off + rx->minlenret;
14977893
JH
1545 }
1546 else { /* startp/endp are used by @- @+. */
1547 rx->startp[0] = s - truebase;
de8c5301 1548 rx->endp[0] = s - truebase + rx->minlenret;
14977893 1549 }
2d862feb 1550 rx->nparens = rx->lastparen = rx->lastcloseparen = 0; /* used by @-, @+, and $^N */
4633a7c4 1551 LEAVE_SCOPE(oldsave);
a0d0e21e
LW
1552 RETPUSHYES;
1553
1554nope:
a0d0e21e 1555ret_no:
d65afb4b 1556 if (global && !(dynpm->op_pmflags & PMf_CONTINUE)) {
a0d0e21e 1557 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
6136c704 1558 MAGIC* const mg = mg_find(TARG, PERL_MAGIC_regex_global);
a0d0e21e 1559 if (mg)
565764a8 1560 mg->mg_len = -1;
a0d0e21e
LW
1561 }
1562 }
4633a7c4 1563 LEAVE_SCOPE(oldsave);
a0d0e21e
LW
1564 if (gimme == G_ARRAY)
1565 RETURN;
1566 RETPUSHNO;
1567}
1568
1569OP *
864dbfa3 1570Perl_do_readline(pTHX)
a0d0e21e 1571{
27da23d5 1572 dVAR; dSP; dTARGETSTACKED;
a0d0e21e
LW
1573 register SV *sv;
1574 STRLEN tmplen = 0;
1575 STRLEN offset;
760ac839 1576 PerlIO *fp;
a3b680e6
AL
1577 register IO * const io = GvIO(PL_last_in_gv);
1578 register const I32 type = PL_op->op_type;
1579 const I32 gimme = GIMME_V;
a0d0e21e 1580
6136c704
AL
1581 if (io) {
1582 MAGIC * const mg = SvTIED_mg((SV*)io, PERL_MAGIC_tiedscalar);
1583 if (mg) {
1584 PUSHMARK(SP);
1585 XPUSHs(SvTIED_obj((SV*)io, mg));
1586 PUTBACK;
1587 ENTER;
1588 call_method("READLINE", gimme);
1589 LEAVE;
1590 SPAGAIN;
1591 if (gimme == G_SCALAR) {
1592 SV* const result = POPs;
1593 SvSetSV_nosteal(TARG, result);
1594 PUSHTARG;
1595 }
1596 RETURN;
0b7c7b4f 1597 }
e79b0511 1598 }
4608196e 1599 fp = NULL;
a0d0e21e
LW
1600 if (io) {
1601 fp = IoIFP(io);
1602 if (!fp) {
1603 if (IoFLAGS(io) & IOf_ARGV) {
1604 if (IoFLAGS(io) & IOf_START) {
a0d0e21e 1605 IoLINES(io) = 0;
3280af22 1606 if (av_len(GvAVn(PL_last_in_gv)) < 0) {
1d7c1841 1607 IoFLAGS(io) &= ~IOf_START;
4608196e 1608 do_open(PL_last_in_gv,"-",1,FALSE,O_RDONLY,0,NULL);
c69033f2 1609 sv_setpvn(GvSVn(PL_last_in_gv), "-", 1);
3280af22 1610 SvSETMAGIC(GvSV(PL_last_in_gv));
a2008d6d
GS
1611 fp = IoIFP(io);
1612 goto have_fp;
a0d0e21e
LW
1613 }
1614 }
3280af22 1615 fp = nextargv(PL_last_in_gv);
a0d0e21e 1616 if (!fp) { /* Note: fp != IoIFP(io) */
3280af22 1617 (void)do_close(PL_last_in_gv, FALSE); /* now it does*/
a0d0e21e
LW
1618 }
1619 }
0d44d22b
NC
1620 else if (type == OP_GLOB)
1621 fp = Perl_start_glob(aTHX_ POPs, io);
a0d0e21e
LW
1622 }
1623 else if (type == OP_GLOB)
1624 SP--;
a00b5bd3 1625 else if (ckWARN(WARN_IO) && IoTYPE(io) == IoTYPE_WRONLY) {
4c80c0b2 1626 report_evil_fh(PL_last_in_gv, io, OP_phoney_OUTPUT_ONLY);
a00b5bd3 1627 }
a0d0e21e
LW
1628 }
1629 if (!fp) {
041457d9
DM
1630 if ((!io || !(IoFLAGS(io) & IOf_START))
1631 && ckWARN2(WARN_GLOB, WARN_CLOSED))
1632 {
3f4520fe 1633 if (type == OP_GLOB)
9014280d 1634 Perl_warner(aTHX_ packWARN(WARN_GLOB),
af8c498a
GS
1635 "glob failed (can't start child: %s)",
1636 Strerror(errno));
69282e91 1637 else
bc37a18f 1638 report_evil_fh(PL_last_in_gv, io, PL_op->op_type);
3f4520fe 1639 }
54310121 1640 if (gimme == G_SCALAR) {
79628082 1641 /* undef TARG, and push that undefined value */
ba92458f
AE
1642 if (type != OP_RCATLINE) {
1643 SV_CHECK_THINKFIRST_COW_DROP(TARG);
0c34ef67 1644 SvOK_off(TARG);
ba92458f 1645 }
a0d0e21e
LW
1646 PUSHTARG;
1647 }
1648 RETURN;
1649 }
a2008d6d 1650 have_fp:
54310121 1651 if (gimme == G_SCALAR) {
a0d0e21e 1652 sv = TARG;
0f722b55
RGS
1653 if (type == OP_RCATLINE && SvGMAGICAL(sv))
1654 mg_get(sv);
48de12d9
RGS
1655 if (SvROK(sv)) {
1656 if (type == OP_RCATLINE)
1657 SvPV_force_nolen(sv);
1658 else
1659 sv_unref(sv);
1660 }
f7877b28
NC
1661 else if (isGV_with_GP(sv)) {
1662 SvPV_force_nolen(sv);
1663 }
862a34c6 1664 SvUPGRADE(sv, SVt_PV);
a0d0e21e 1665 tmplen = SvLEN(sv); /* remember if already alloced */
bc44a8a2 1666 if (!tmplen && !SvREADONLY(sv))
a0d0e21e 1667 Sv_Grow(sv, 80); /* try short-buffering it */
2b5e58c4
AMS
1668 offset = 0;
1669 if (type == OP_RCATLINE && SvOK(sv)) {
1670 if (!SvPOK(sv)) {
8b6b16e7 1671 SvPV_force_nolen(sv);
2b5e58c4 1672 }
a0d0e21e 1673 offset = SvCUR(sv);
2b5e58c4 1674 }
a0d0e21e 1675 }
54310121 1676 else {
561b68a9 1677 sv = sv_2mortal(newSV(80));
54310121
PP
1678 offset = 0;
1679 }
fbad3eb5 1680
3887d568
AP
1681 /* This should not be marked tainted if the fp is marked clean */
1682#define MAYBE_TAINT_LINE(io, sv) \
1683 if (!(IoFLAGS(io) & IOf_UNTAINT)) { \
1684 TAINT; \
1685 SvTAINTED_on(sv); \
1686 }
1687
684bef36 1688/* delay EOF state for a snarfed empty file */
fbad3eb5 1689#define SNARF_EOF(gimme,rs,io,sv) \
684bef36 1690 (gimme != G_SCALAR || SvCUR(sv) \
b9fee9ba 1691 || (IoFLAGS(io) & IOf_NOLINE) || !RsSNARF(rs))
fbad3eb5 1692
a0d0e21e 1693 for (;;) {
09e8efcc 1694 PUTBACK;
fbad3eb5 1695 if (!sv_gets(sv, fp, offset)
2d726892
TF
1696 && (type == OP_GLOB
1697 || SNARF_EOF(gimme, PL_rs, io, sv)
1698 || PerlIO_error(fp)))
fbad3eb5 1699 {
760ac839 1700 PerlIO_clearerr(fp);
a0d0e21e 1701 if (IoFLAGS(io) & IOf_ARGV) {
3280af22 1702 fp = nextargv(PL_last_in_gv);
a0d0e21e
LW
1703 if (fp)
1704 continue;
3280af22 1705 (void)do_close(PL_last_in_gv, FALSE);
a0d0e21e
LW
1706 }
1707 else if (type == OP_GLOB) {
e476b1b5 1708 if (!do_close(PL_last_in_gv, FALSE) && ckWARN(WARN_GLOB)) {
9014280d 1709 Perl_warner(aTHX_ packWARN(WARN_GLOB),
4eb79ab5 1710 "glob failed (child exited with status %d%s)",
894356b3 1711 (int)(STATUS_CURRENT >> 8),
cf494569 1712 (STATUS_CURRENT & 0x80) ? ", core dumped" : "");
4eb79ab5 1713 }
a0d0e21e 1714 }
54310121 1715 if (gimme == G_SCALAR) {
ba92458f
AE
1716 if (type != OP_RCATLINE) {
1717 SV_CHECK_THINKFIRST_COW_DROP(TARG);
0c34ef67 1718 SvOK_off(TARG);
ba92458f 1719 }
09e8efcc 1720 SPAGAIN;
a0d0e21e
LW
1721 PUSHTARG;
1722 }
3887d568 1723 MAYBE_TAINT_LINE(io, sv);
a0d0e21e
LW
1724 RETURN;
1725 }
3887d568 1726 MAYBE_TAINT_LINE(io, sv);
a0d0e21e 1727 IoLINES(io)++;
b9fee9ba 1728 IoFLAGS(io) |= IOf_NOLINE;
71be2cbc 1729 SvSETMAGIC(sv);
09e8efcc 1730 SPAGAIN;
a0d0e21e 1731 XPUSHs(sv);
a0d0e21e 1732 if (type == OP_GLOB) {
349d4f2f 1733 const char *t1;
a0d0e21e 1734
3280af22 1735 if (SvCUR(sv) > 0 && SvCUR(PL_rs) > 0) {
6136c704 1736 char * const tmps = SvEND(sv) - 1;
aa07b2f6 1737 if (*tmps == *SvPVX_const(PL_rs)) {
c07a80fd 1738 *tmps = '\0';
b162af07 1739 SvCUR_set(sv, SvCUR(sv) - 1);
c07a80fd
PP
1740 }
1741 }
349d4f2f
NC
1742 for (t1 = SvPVX_const(sv); *t1; t1++)
1743 if (!isALPHA(*t1) && !isDIGIT(*t1) &&
1744 strchr("$&*(){}[]'\";\\|?<>~`", *t1))
a0d0e21e 1745 break;
349d4f2f 1746 if (*t1 && PerlLIO_lstat(SvPVX_const(sv), &PL_statbuf) < 0) {
a0d0e21e
LW
1747 (void)POPs; /* Unmatched wildcard? Chuck it... */
1748 continue;
1749 }
2d79bf7f 1750 } else if (SvUTF8(sv)) { /* OP_READLINE, OP_RCATLINE */
d4c19fe8
AL
1751 if (ckWARN(WARN_UTF8)) {
1752 const U8 * const s = (const U8*)SvPVX_const(sv) + offset;
1753 const STRLEN len = SvCUR(sv) - offset;
1754 const U8 *f;
1755
1756 if (!is_utf8_string_loc(s, len, &f))
1757 /* Emulate :encoding(utf8) warning in the same case. */
1758 Perl_warner(aTHX_ packWARN(WARN_UTF8),
1759 "utf8 \"\\x%02X\" does not map to Unicode",
1760 f < (U8*)SvEND(sv) ? *f : 0);
1761 }
a0d0e21e 1762 }
54310121 1763 if (gimme == G_ARRAY) {
a0d0e21e 1764 if (SvLEN(sv) - SvCUR(sv) > 20) {
1da4ca5f 1765 SvPV_shrink_to_cur(sv);
a0d0e21e 1766 }
561b68a9 1767 sv = sv_2mortal(newSV(80));
a0d0e21e
LW
1768 continue;
1769 }
54310121 1770 else if (gimme == G_SCALAR && !tmplen && SvLEN(sv) - SvCUR(sv) > 80) {
a0d0e21e 1771 /* try to reclaim a bit of scalar space (only on 1st alloc) */
d5b5861b
NC
1772 const STRLEN new_len
1773 = SvCUR(sv) < 60 ? 80 : SvCUR(sv)+40; /* allow some slop */
1da4ca5f 1774 SvPV_renew(sv, new_len);
a0d0e21e
LW
1775 }
1776 RETURN;
1777 }
1778}
1779
1780PP(pp_enter)
1781{
27da23d5 1782 dVAR; dSP;
c09156bb 1783 register PERL_CONTEXT *cx;
533c011a 1784 I32 gimme = OP_GIMME(PL_op, -1);
a0d0e21e 1785
54310121
PP
1786 if (gimme == -1) {
1787 if (cxstack_ix >= 0)
1788 gimme = cxstack[cxstack_ix].blk_gimme;
1789 else
1790 gimme = G_SCALAR;
1791 }
a0d0e21e
LW
1792
1793 ENTER;
1794
1795 SAVETMPS;
924508f0 1796 PUSHBLOCK(cx, CXt_BLOCK, SP);
a0d0e21e
LW
1797
1798 RETURN;
1799}
1800
1801PP(pp_helem)
1802{
97aff369 1803 dVAR; dSP;
760ac839 1804 HE* he;
ae77835f 1805 SV **svp;
c445ea15
AL
1806 SV * const keysv = POPs;
1807 HV * const hv = (HV*)POPs;
a3b680e6
AL
1808 const U32 lval = PL_op->op_flags & OPf_MOD || LVRET;
1809 const U32 defer = PL_op->op_private & OPpLVAL_DEFER;
be6c24e0 1810 SV *sv;
c158a4fd 1811 const U32 hash = (SvIsCOW_shared_hash(keysv)) ? SvSHARED_HASH(keysv) : 0;
9c5ffd7c 1812 I32 preeminent = 0;
a0d0e21e 1813
d4c19fe8 1814 if (SvTYPE(hv) != SVt_PVHV)
a0d0e21e 1815 RETPUSHUNDEF;
d4c19fe8
AL
1816
1817 if (PL_op->op_private & OPpLVAL_INTRO) {
1818 MAGIC *mg;
1819 HV *stash;
1820 /* does the element we're localizing already exist? */
1821 preeminent = /* can we determine whether it exists? */
1822 ( !SvRMAGICAL(hv)
1823 || mg_find((SV*)hv, PERL_MAGIC_env)
1824 || ( (mg = mg_find((SV*)hv, PERL_MAGIC_tied))
1825 /* Try to preserve the existenceness of a tied hash
1826 * element by using EXISTS and DELETE if possible.
1827 * Fallback to FETCH and STORE otherwise */
1828 && (stash = SvSTASH(SvRV(SvTIED_obj((SV*)hv, mg))))
1829 && gv_fetchmethod_autoload(stash, "EXISTS", TRUE)
1830 && gv_fetchmethod_autoload(stash, "DELETE", TRUE)
1831 )
1832 ) ? hv_exists_ent(hv, keysv, 0) : 1;
1833 }
1834 he = hv_fetch_ent(hv, keysv, lval && !defer, hash);
1835 svp = he ? &HeVAL(he) : NULL;
a0d0e21e 1836 if (lval) {
3280af22 1837 if (!svp || *svp == &PL_sv_undef) {
68dc0745
PP
1838 SV* lv;
1839 SV* key2;
2d8e6c8d 1840 if (!defer) {
be2597df 1841 DIE(aTHX_ PL_no_helem_sv, SVfARG(keysv));
2d8e6c8d 1842 }
68dc0745
PP
1843 lv = sv_newmortal();
1844 sv_upgrade(lv, SVt_PVLV);
1845 LvTYPE(lv) = 'y';
6136c704 1846 sv_magic(lv, key2 = newSVsv(keysv), PERL_MAGIC_defelem, NULL, 0);
68dc0745 1847 SvREFCNT_dec(key2); /* sv_magic() increments refcount */
b37c2d43 1848 LvTARG(lv) = SvREFCNT_inc_simple(hv);
68dc0745
PP
1849 LvTARGLEN(lv) = 1;
1850 PUSHs(lv);
1851 RETURN;
1852 }
533c011a 1853 if (PL_op->op_private & OPpLVAL_INTRO) {
bfcb3514 1854 if (HvNAME_get(hv) && isGV(*svp))
533c011a 1855 save_gp((GV*)*svp, !(PL_op->op_flags & OPf_SPECIAL));
1f5346dc
SC
1856 else {
1857 if (!preeminent) {
1858 STRLEN keylen;
e62f0680 1859 const char * const key = SvPV_const(keysv, keylen);
7d654f43 1860 SAVEDELETE(hv, savepvn(key,keylen),
bb7a0f54 1861 SvUTF8(keysv) ? -(I32)keylen : (I32)keylen);
bfc4de9f 1862 } else
1f5346dc
SC
1863 save_helem(hv, keysv, svp);
1864 }
5f05dabc 1865 }
533c011a
NIS
1866 else if (PL_op->op_private & OPpDEREF)
1867 vivify_ref(*svp, PL_op->op_private & OPpDEREF);
a0d0e21e 1868 }
3280af22 1869 sv = (svp ? *svp : &PL_sv_undef);
be6c24e0
GS
1870 /* This makes C<local $tied{foo} = $tied{foo}> possible.
1871 * Pushing the magical RHS on to the stack is useless, since
1872 * that magic is soon destined to be misled by the local(),
1873 * and thus the later pp_sassign() will fail to mg_get() the
1874 * old value. This should also cure problems with delayed
1875 * mg_get()s. GSAR 98-07-03 */
1876 if (!lval && SvGMAGICAL(sv))
1877 sv = sv_mortalcopy(sv);
1878 PUSHs(sv);
a0d0e21e
LW
1879 RETURN;
1880}
1881
1882PP(pp_leave)
1883{
27da23d5 1884 dVAR; dSP;
c09156bb 1885 register PERL_CONTEXT *cx;
a0d0e21e
LW
1886 SV **newsp;
1887 PMOP *newpm;
1888 I32 gimme;
1889
533c011a 1890 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e 1891 cx = &cxstack[cxstack_ix];
3280af22 1892 cx->blk_oldpm = PL_curpm; /* fake block should preserve $1 et al */
a0d0e21e
LW
1893 }
1894
1895 POPBLOCK(cx,newpm);
1896
533c011a 1897 gimme = OP_GIMME(PL_op, -1);
54310121
PP
1898 if (gimme == -1) {
1899 if (cxstack_ix >= 0)
1900 gimme = cxstack[cxstack_ix].blk_gimme;
1901 else
1902 gimme = G_SCALAR;
1903 }
a0d0e21e 1904
a1f49e72 1905 TAINT_NOT;
54310121
PP
1906 if (gimme == G_VOID)
1907 SP = newsp;
1908 else if (gimme == G_SCALAR) {
a3b680e6 1909 register SV **mark;
54310121 1910 MARK = newsp + 1;
09256e2f 1911 if (MARK <= SP) {
54310121
PP
1912 if (SvFLAGS(TOPs) & (SVs_PADTMP|SVs_TEMP))
1913 *MARK = TOPs;
1914 else
1915 *MARK = sv_mortalcopy(TOPs);
09256e2f 1916 } else {
54310121 1917 MEXTEND(mark,0);
3280af22 1918 *MARK = &PL_sv_undef;
a0d0e21e 1919 }
54310121 1920 SP = MARK;
a0d0e21e 1921 }
54310121 1922 else if (gimme == G_ARRAY) {
a1f49e72 1923 /* in case LEAVE wipes old return values */
a3b680e6 1924 register SV **mark;
a1f49e72
CS
1925 for (mark = newsp + 1; mark <= SP; mark++) {
1926 if (!(SvFLAGS(*mark) & (SVs_PADTMP|SVs_TEMP))) {
a0d0e21e 1927 *mark = sv_mortalcopy(*mark);
a1f49e72
CS
1928 TAINT_NOT; /* Each item is independent */
1929 }
1930 }
a0d0e21e 1931 }
3280af22 1932 PL_curpm = newpm; /* Don't pop $1 et al till now */
a0d0e21e
LW
1933
1934 LEAVE;
1935
1936 RETURN;
1937}
1938
1939PP(pp_iter)
1940{
97aff369 1941 dVAR; dSP;
c09156bb 1942 register PERL_CONTEXT *cx;
dc09a129 1943 SV *sv, *oldsv;
4633a7c4 1944 AV* av;
1d7c1841 1945 SV **itersvp;
a0d0e21e 1946
924508f0 1947 EXTEND(SP, 1);
a0d0e21e 1948 cx = &cxstack[cxstack_ix];
6b35e009 1949 if (CxTYPE(cx) != CXt_LOOP)
cea2e8a9 1950 DIE(aTHX_ "panic: pp_iter");
a0d0e21e 1951
1d7c1841 1952 itersvp = CxITERVAR(cx);
4633a7c4 1953 av = cx->blk_loop.iterary;
89ea2908
GA
1954 if (SvTYPE(av) != SVt_PVAV) {
1955 /* iterate ($min .. $max) */
1956 if (cx->blk_loop.iterlval) {
1957 /* string increment */
1958 register SV* cur = cx->blk_loop.iterlval;
4fe3f0fa 1959 STRLEN maxlen = 0;
10edeb5d
JH
1960 const char *max =
1961 SvOK((SV*)av) ?
1962 SvPV_const((SV*)av, maxlen) : (const char *)"";
89ea2908 1963 if (!SvNIOK(cur) && SvCUR(cur) <= maxlen) {
1d7c1841 1964 if (SvREFCNT(*itersvp) == 1 && !SvMAGICAL(*itersvp)) {
eaa5c2d6 1965 /* safe to reuse old SV */
1d7c1841 1966 sv_setsv(*itersvp, cur);
eaa5c2d6 1967 }
1c846c1f 1968 else
eaa5c2d6
GA
1969 {
1970 /* we need a fresh SV every time so that loop body sees a
1971 * completely new SV for closures/references to work as
1972 * they used to */
dc09a129 1973 oldsv = *itersvp;
1d7c1841 1974 *itersvp = newSVsv(cur);
dc09a129 1975 SvREFCNT_dec(oldsv);
eaa5c2d6 1976 }
aa07b2f6 1977 if (strEQ(SvPVX_const(cur), max))
89ea2908
GA
1978 sv_setiv(cur, 0); /* terminate next time */
1979 else
1980 sv_inc(cur);
1981 RETPUSHYES;
1982 }
1983 RETPUSHNO;
1984 }
1985 /* integer increment */
1986 if (cx->blk_loop.iterix > cx->blk_loop.itermax)
1987 RETPUSHNO;
7f61b687 1988
3db8f154 1989 /* don't risk potential race */
1d7c1841 1990 if (SvREFCNT(*itersvp) == 1 && !SvMAGICAL(*itersvp)) {
eaa5c2d6 1991 /* safe to reuse old SV */
1d7c1841 1992 sv_setiv(*itersvp, cx->blk_loop.iterix++);
eaa5c2d6 1993 }
1c846c1f 1994 else
eaa5c2d6
GA
1995 {
1996 /* we need a fresh SV every time so that loop body sees a
1997 * completely new SV for closures/references to work as they
1998 * used to */
dc09a129 1999 oldsv = *itersvp;
1d7c1841 2000 *itersvp = newSViv(cx->blk_loop.iterix++);
dc09a129 2001 SvREFCNT_dec(oldsv);
eaa5c2d6 2002 }
89ea2908
GA
2003 RETPUSHYES;
2004 }
2005
2006 /* iterate array */
ef3e5ea9
NC
2007 if (PL_op->op_private & OPpITER_REVERSED) {
2008 /* In reverse, use itermax as the min :-) */
c491ecac 2009 if (cx->blk_loop.iterix <= cx->blk_loop.itermax)
ef3e5ea9 2010 RETPUSHNO;
a0d0e21e 2011
ef3e5ea9 2012 if (SvMAGICAL(av) || AvREIFY(av)) {
c445ea15 2013 SV * const * const svp = av_fetch(av, --cx->blk_loop.iterix, FALSE);
a0714e2c 2014 sv = svp ? *svp : NULL;
ef3e5ea9
NC
2015 }
2016 else {
6e585ca0 2017 sv = AvARRAY(av)[--cx->blk_loop.iterix];
ef3e5ea9 2018 }
d42935ef
JH
2019 }
2020 else {
ef3e5ea9
NC
2021 if (cx->blk_loop.iterix >= (av == PL_curstack ? cx->blk_oldsp :
2022 AvFILL(av)))
2023 RETPUSHNO;
2024
2025 if (SvMAGICAL(av) || AvREIFY(av)) {
c445ea15 2026 SV * const * const svp = av_fetch(av, ++cx->blk_loop.iterix, FALSE);
a0714e2c 2027 sv = svp ? *svp : NULL;
ef3e5ea9
NC
2028 }
2029 else {
2030 sv = AvARRAY(av)[++cx->blk_loop.iterix];
2031 }
d42935ef 2032 }
ef3e5ea9 2033
0565a181 2034 if (sv && SvIS_FREED(sv)) {
a0714e2c 2035 *itersvp = NULL;
b6c83531 2036 Perl_croak(aTHX_ "Use of freed value in iteration");
cccede53
DM
2037 }
2038
d42935ef 2039 if (sv)
a0d0e21e 2040 SvTEMP_off(sv);
a0d0e21e 2041 else
3280af22 2042 sv = &PL_sv_undef;
8b530633 2043 if (av != PL_curstack && sv == &PL_sv_undef) {
5f05dabc 2044 SV *lv = cx->blk_loop.iterlval;
71be2cbc
PP
2045 if (lv && SvREFCNT(lv) > 1) {
2046 SvREFCNT_dec(lv);
a0714e2c 2047 lv = NULL;
71be2cbc 2048 }
5f05dabc
PP
2049 if (lv)
2050 SvREFCNT_dec(LvTARG(lv));
2051 else {
561b68a9 2052 lv = cx->blk_loop.iterlval = newSV(0);
5f05dabc 2053 sv_upgrade(lv, SVt_PVLV);
5f05dabc 2054 LvTYPE(lv) = 'y';
6136c704 2055 sv_magic(lv, NULL, PERL_MAGIC_defelem, NULL, 0);
5f05dabc 2056 }
b37c2d43 2057 LvTARG(lv) = SvREFCNT_inc_simple(av);
5f05dabc 2058 LvTARGOFF(lv) = cx->blk_loop.iterix;
42718184 2059 LvTARGLEN(lv) = (STRLEN)UV_MAX;
5f05dabc
PP
2060 sv = (SV*)lv;
2061 }
a0d0e21e 2062
dc09a129 2063 oldsv = *itersvp;
b37c2d43 2064 *itersvp = SvREFCNT_inc_simple_NN(sv);
dc09a129
DM
2065 SvREFCNT_dec(oldsv);
2066
a0d0e21e
LW
2067 RETPUSHYES;
2068}
2069
2070PP(pp_subst)
2071{
97aff369 2072 dVAR; dSP; dTARG;
a0d0e21e
LW
2073 register PMOP *pm = cPMOP;
2074 PMOP *rpm = pm;
a0d0e21e
LW
2075 register char *s;
2076 char *strend;
2077 register char *m;
5c144d81 2078 const char *c;
a0d0e21e
LW
2079 register char *d;
2080 STRLEN clen;
2081 I32 iters = 0;
2082 I32 maxiters;
2083 register I32 i;
2084 bool once;
71be2cbc 2085 bool rxtainted;
a0d0e21e 2086 char *orig;
22e551b9 2087 I32 r_flags;
aaa362c4 2088 register REGEXP *rx = PM_GETRE(pm);
a0d0e21e
LW
2089 STRLEN len;
2090 int force_on_match = 0;
0bcc34c2 2091 const I32 oldsave = PL_savestack_ix;
792b2c16 2092 STRLEN slen;
f272994b 2093 bool doutf8 = FALSE;
f8c7b90f 2094#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
2095 bool is_cow;
2096#endif
a0714e2c 2097 SV *nsv = NULL;
a0d0e21e 2098
5cd24f17 2099 /* known replacement string? */
b37c2d43 2100 register SV *dstr = (pm->op_pmflags & PMf_CONST) ? POPs : NULL;
533c011a 2101 if (PL_op->op_flags & OPf_STACKED)
a0d0e21e 2102 TARG = POPs;
59f00321
RGS
2103 else if (PL_op->op_private & OPpTARGET_MY)
2104 GETTARGET;
a0d0e21e 2105 else {
54b9620d 2106 TARG = DEFSV;
a0d0e21e 2107 EXTEND(SP,1);
1c846c1f 2108 }
d9f424b2 2109
f8c7b90f 2110#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
2111 /* Awooga. Awooga. "bool" types that are actually char are dangerous,
2112 because they make integers such as 256 "false". */
2113 is_cow = SvIsCOW(TARG) ? TRUE : FALSE;
2114#else
765f542d
NC
2115 if (SvIsCOW(TARG))
2116 sv_force_normal_flags(TARG,0);
ed252734
NC
2117#endif
2118 if (
f8c7b90f 2119#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
2120 !is_cow &&
2121#endif
2122 (SvREADONLY(TARG)
cecf5685
NC
2123 || ( ((SvTYPE(TARG) == SVt_PVGV && isGV_with_GP(TARG))
2124 || SvTYPE(TARG) > SVt_PVLV)
4ce457a6 2125 && !(SvTYPE(TARG) == SVt_PVGV && SvFAKE(TARG)))))
d470f89e 2126 DIE(aTHX_ PL_no_modify);
8ec5e241
NIS
2127 PUTBACK;
2128
d5263905 2129 s = SvPV_mutable(TARG, len);
68dc0745 2130 if (!SvPOKp(TARG) || SvTYPE(TARG) == SVt_PVGV)
a0d0e21e 2131 force_on_match = 1;
b3eb6a9b 2132 rxtainted = ((pm->op_pmdynflags & PMdf_TAINTED) ||
3280af22
NIS
2133 (PL_tainted && (pm->op_pmflags & PMf_RETAINT)));
2134 if (PL_tainted)
b3eb6a9b 2135 rxtainted |= 2;
9212bbba 2136 TAINT_NOT;
a12c0f56 2137
a30b2f1f 2138 RX_MATCH_UTF8_set(rx, DO_UTF8(TARG));
d9f424b2 2139
a0d0e21e
LW
2140 force_it:
2141 if (!pm || !s)
2269b42e 2142 DIE(aTHX_ "panic: pp_subst");
a0d0e21e
LW
2143
2144 strend = s + len;
a30b2f1f 2145 slen = RX_MATCH_UTF8(rx) ? utf8_length((U8*)s, (U8*)strend) : len;
792b2c16
JH
2146 maxiters = 2 * slen + 10; /* We can match twice at each
2147 position, once with zero-length,
2148 second time with non-zero. */
a0d0e21e 2149
3280af22
NIS
2150 if (!rx->prelen && PL_curpm) {
2151 pm = PL_curpm;
aaa362c4 2152 rx = PM_GETRE(pm);
a0d0e21e 2153 }
0b78c20a
JH
2154 r_flags = (rx->nparens || SvTEMP(TARG) || PL_sawampersand
2155 || (pm->op_pmflags & PMf_EVAL))
ed252734 2156 ? REXEC_COPY_STR : 0;
f722798b 2157 if (SvSCREAM(TARG))
22e551b9 2158 r_flags |= REXEC_SCREAM;
7fba1cd6 2159
a0d0e21e 2160 orig = m = s;
bbe252da 2161 if (rx->extflags & RXf_USE_INTUIT) {
ee0b7718 2162 PL_bostr = orig;
f9f4320a 2163 s = CALLREG_INTUIT_START(rx, TARG, s, strend, r_flags, NULL);
f722798b
IZ
2164
2165 if (!s)
2166 goto nope;
2167 /* How to do it in subst? */
bbe252da 2168/* if ( (rx->extflags & RXf_CHECK_ALL)
1c846c1f 2169 && !PL_sawampersand
bbe252da
YO
2170 && ((rx->extflags & RXf_NOSCAN)
2171 || !((rx->extflags & RXf_INTUIT_TAIL)
f722798b
IZ
2172 && (r_flags & REXEC_SCREAM))))
2173 goto yup;
2174*/
a0d0e21e 2175 }
71be2cbc
PP
2176
2177 /* only replace once? */
a0d0e21e 2178 once = !(rpm->op_pmflags & PMf_GLOBAL);
71be2cbc
PP
2179
2180 /* known replacement string? */
f272994b 2181 if (dstr) {
8514a05a
JH
2182 /* replacement needing upgrading? */
2183 if (DO_UTF8(TARG) && !doutf8) {
db79b45b 2184 nsv = sv_newmortal();
4a176938 2185 SvSetSV(nsv, dstr);
8514a05a
JH
2186 if (PL_encoding)
2187 sv_recode_to_utf8(nsv, PL_encoding);
2188 else
2189 sv_utf8_upgrade(nsv);
5c144d81 2190 c = SvPV_const(nsv, clen);
4a176938
JH
2191 doutf8 = TRUE;
2192 }
2193 else {
5c144d81 2194 c = SvPV_const(dstr, clen);
4a176938 2195 doutf8 = DO_UTF8(dstr);
8514a05a 2196 }
f272994b
A
2197 }
2198 else {
6136c704 2199 c = NULL;
f272994b
A
2200 doutf8 = FALSE;
2201 }
2202
71be2cbc 2203 /* can do inplace substitution? */
ed252734 2204 if (c
f8c7b90f 2205#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
2206 && !is_cow
2207#endif
de8c5301 2208 && (I32)clen <= rx->minlenret && (once || !(r_flags & REXEC_COPY_STR))
bbe252da 2209 && !(rx->extflags & RXf_LOOKBEHIND_SEEN)
db79b45b 2210 && (!doutf8 || SvUTF8(TARG))) {
f9f4320a 2211 if (!CALLREGEXEC(rx, s, strend, orig, 0, TARG, NULL,
f722798b
IZ
2212 r_flags | REXEC_CHECKED))
2213 {
8ec5e241 2214 SPAGAIN;
3280af22 2215 PUSHs(&PL_sv_no);
71be2cbc
PP
2216 LEAVE_SCOPE(oldsave);
2217 RETURN;
2218 }
f8c7b90f 2219#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
2220 if (SvIsCOW(TARG)) {
2221 assert (!force_on_match);
2222 goto have_a_cow;
2223 }
2224#endif
71be2cbc
PP
2225 if (force_on_match) {
2226 force_on_match = 0;
2227 s = SvPV_force(TARG, len);
2228 goto force_it;
2229 }
71be2cbc 2230 d = s;
3280af22 2231 PL_curpm = pm;
71be2cbc
PP
2232 SvSCREAM_off(TARG); /* disable possible screamer */
2233 if (once) {
48c036b1 2234 rxtainted |= RX_MATCH_TAINTED(rx);
cf93c79d
IZ
2235 m = orig + rx->startp[0];
2236 d = orig + rx->endp[0];
71be2cbc
PP
2237 s = orig;
2238 if (m - s > strend - d) { /* faster to shorten from end */
2239 if (clen) {
2240 Copy(c, m, clen, char);
2241 m += clen;
a0d0e21e 2242 }
71be2cbc
PP
2243 i = strend - d;
2244 if (i > 0) {
2245 Move(d, m, i, char);
2246 m += i;
a0d0e21e 2247 }
71be2cbc
PP
2248 *m = '\0';
2249 SvCUR_set(TARG, m - s);
2250 }
155aba94 2251 else if ((i = m - s)) { /* faster from front */
71be2cbc
PP
2252 d -= clen;
2253 m = d;
2254 sv_chop(TARG, d-i);
2255 s += i;
2256 while (i--)
2257 *--d = *--s;
2258 if (clen)
2259 Copy(c, m, clen, char);
2260 }
2261 else if (clen) {
2262 d -= clen;
2263 sv_chop(TARG, d);
2264 Copy(c, d, clen, char);
2265 }
2266 else {
2267 sv_chop(TARG, d);
2268 }
48c036b1 2269 TAINT_IF(rxtainted & 1);
8ec5e241 2270 SPAGAIN;
3280af22 2271 PUSHs(&PL_sv_yes);
71be2cbc
PP
2272 }
2273 else {
71be2cbc
PP
2274 do {
2275 if (iters++ > maxiters)
cea2e8a9 2276 DIE(aTHX_ "Substitution loop");
d9f97599 2277 rxtainted |= RX_MATCH_TAINTED(rx);
cf93c79d 2278 m = rx->startp[0] + orig;
155aba94 2279 if ((i = m - s)) {
71be2cbc
PP
2280 if (s != d)
2281 Move(s, d, i, char);
2282 d += i;
a0d0e21e 2283 }
71be2cbc
PP
2284 if (clen) {
2285 Copy(c, d, clen, char);
2286 d += clen;
2287 }
cf93c79d 2288 s = rx->endp[0] + orig;
f9f4320a 2289 } while (CALLREGEXEC(rx, s, strend, orig, s == m,
f722798b
IZ
2290 TARG, NULL,
2291 /* don't match same null twice */
2292 REXEC_NOT_FIRST|REXEC_IGNOREPOS));
71be2cbc
PP
2293 if (s != d) {
2294 i = strend - s;
aa07b2f6 2295 SvCUR_set(TARG, d - SvPVX_const(TARG) + i);
71be2cbc 2296 Move(s, d, i+1, char); /* include the NUL */
a0d0e21e 2297 }
48c036b1 2298 TAINT_IF(rxtainted & 1);
8ec5e241 2299 SPAGAIN;
71be2cbc 2300 PUSHs(sv_2mortal(newSViv((I32)iters)));
a0d0e21e 2301 }
80b498e0 2302 (void)SvPOK_only_UTF8(TARG);
48c036b1 2303 TAINT_IF(rxtainted);
8ec5e241
NIS
2304 if (SvSMAGICAL(TARG)) {
2305 PUTBACK;
2306 mg_set(TARG);
2307 SPAGAIN;
2308 }
9212bbba 2309 SvTAINT(TARG);
aefe6dfc
JH
2310 if (doutf8)
2311 SvUTF8_on(TARG);
71be2cbc
PP
2312 LEAVE_SCOPE(oldsave);
2313 RETURN;
a0d0e21e 2314 }
71be2cbc 2315
f9f4320a 2316 if (CALLREGEXEC(rx, s, strend, orig, 0, TARG, NULL,
f722798b
IZ
2317 r_flags | REXEC_CHECKED))
2318 {
a0d0e21e
LW
2319 if (force_on_match) {
2320 force_on_match = 0;
2321 s = SvPV_force(TARG, len);
2322 goto force_it;
2323 }
f8c7b90f 2324#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
2325 have_a_cow:
2326#endif
48c036b1 2327 rxtainted |= RX_MATCH_TAINTED(rx);
f2b990bf 2328 dstr = newSVpvn(m, s-m);
cff085c1 2329 SAVEFREESV(dstr);
ffc61ed2
JH
2330 if (DO_UTF8(TARG))
2331 SvUTF8_on(dstr);
3280af22 2332 PL_curpm = pm;
a0d0e21e 2333 if (!c) {
c09156bb 2334 register PERL_CONTEXT *cx;
8ec5e241 2335 SPAGAIN;
a0d0e21e
LW
2336 PUSHSUBST(cx);
2337 RETURNOP(cPMOP->op_pmreplroot);
2338 }
cf93c79d 2339 r_flags |= REXEC_IGNOREPOS | REXEC_NOT_FIRST;
a0d0e21e
LW
2340 do {
2341 if (iters++ > maxiters)
cea2e8a9 2342 DIE(aTHX_ "Substitution loop");
d9f97599 2343 rxtainted |= RX_MATCH_TAINTED(rx);
cf93c79d 2344 if (RX_MATCH_COPIED(rx) && rx->subbeg != orig) {
a0d0e21e
LW
2345 m = s;
2346 s = orig;
cf93c79d 2347 orig = rx->subbeg;
a0d0e21e
LW
2348 s = orig + (m - s);
2349 strend = s + (strend - m);
2350 }
cf93c79d 2351 m = rx->startp[0] + orig;
db79b45b
JH
2352 if (doutf8 && !SvUTF8(dstr))
2353 sv_catpvn_utf8_upgrade(dstr, s, m - s, nsv);
2354 else
2355 sv_catpvn(dstr, s, m-s);
cf93c79d 2356 s = rx->endp[0] + orig;
a0d0e21e
LW
2357 if (clen)
2358 sv_catpvn(dstr, c, clen);
2359 if (once)
2360 break;
f9f4320a 2361 } while (CALLREGEXEC(rx, s, strend, orig, s == m,
ffc61ed2 2362 TARG, NULL, r_flags));
db79b45b
JH
2363 if (doutf8 && !DO_UTF8(TARG))
2364 sv_catpvn_utf8_upgrade(dstr, s, strend - s, nsv);
89afcb60
A
2365 else
2366 sv_catpvn(dstr, s, strend - s);
748a9306 2367
f8c7b90f 2368#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
2369 /* The match may make the string COW. If so, brilliant, because that's
2370 just saved us one malloc, copy and free - the regexp has donated
2371 the old buffer, and we malloc an entirely new one, rather than the
2372 regexp malloc()ing a buffer and copying our original, only for
2373 us to throw it away here during the substitution. */
2374 if (SvIsCOW(TARG)) {
2375 sv_force_normal_flags(TARG, SV_COW_DROP_PV);
2376 } else
2377#endif
2378 {
8bd4d4c5 2379 SvPV_free(TARG);
ed252734 2380 }
f880fe2f 2381 SvPV_set(TARG, SvPVX(dstr));
748a9306
LW
2382 SvCUR_set(TARG, SvCUR(dstr));
2383 SvLEN_set(TARG, SvLEN(dstr));
f272994b 2384 doutf8 |= DO_UTF8(dstr);
6136c704 2385 SvPV_set(dstr, NULL);
748a9306 2386
48c036b1 2387 TAINT_IF(rxtainted & 1);
f878fbec 2388 SPAGAIN;
48c036b1
GS
2389 PUSHs(sv_2mortal(newSViv((I32)iters)));
2390
a0d0e21e 2391 (void)SvPOK_only(TARG);
f272994b 2392 if (doutf8)
60aeb6fd 2393 SvUTF8_on(TARG);
48c036b1 2394 TAINT_IF(rxtainted);
a0d0e21e 2395 SvSETMAGIC(TARG);
9212bbba 2396 SvTAINT(TARG);
4633a7c4 2397 LEAVE_SCOPE(oldsave);
a0d0e21e
LW
2398 RETURN;
2399 }
5cd24f17 2400 goto ret_no;
a0d0e21e
LW
2401
2402nope:
1c846c1f 2403ret_no:
8ec5e241 2404 SPAGAIN;
3280af22 2405 PUSHs(&PL_sv_no);
4633a7c4 2406 LEAVE_SCOPE(oldsave);
a0d0e21e
LW
2407 RETURN;
2408}
2409
2410PP(pp_grepwhile)
2411{
27da23d5 2412 dVAR; dSP;
a0d0e21e
LW
2413
2414 if (SvTRUEx(POPs))
3280af22
NIS
2415 PL_stack_base[PL_markstack_ptr[-1]++] = PL_stack_base[*PL_markstack_ptr];
2416 ++*PL_markstack_ptr;
a0d0e21e
LW
2417 LEAVE; /* exit inner scope */
2418
2419 /* All done yet? */
3280af22 2420 if (PL_stack_base + *PL_markstack_ptr > SP) {
a0d0e21e 2421 I32 items;
c4420975 2422 const I32 gimme = GIMME_V;
a0d0e21e
LW
2423
2424 LEAVE; /* exit outer scope */
2425 (void)POPMARK; /* pop src */
3280af22 2426 items = --*PL_markstack_ptr - PL_markstack_ptr[-1];
a0d0e21e 2427 (void)POPMARK; /* pop dst */
3280af22 2428 SP = PL_stack_base + POPMARK; /* pop original mark */
54310121 2429 if (gimme == G_SCALAR) {
7cc47870 2430 if (PL_op->op_private & OPpGREP_LEX) {
c4420975 2431 SV* const sv = sv_newmortal();
7cc47870
RGS
2432 sv_setiv(sv, items);
2433 PUSHs(sv);
2434 }
2435 else {
2436 dTARGET;
2437 XPUSHi(items);
2438 }
a0d0e21e 2439 }
54310121
PP
2440 else if (gimme == G_ARRAY)
2441 SP += items;
a0d0e21e
LW
2442 RETURN;
2443 }
2444 else {
2445 SV *src;
2446
2447 ENTER; /* enter inner scope */
1d7c1841 2448 SAVEVPTR(PL_curpm);
a0d0e21e 2449
3280af22 2450 src = PL_stack_base[*PL_markstack_ptr];
a0d0e21e 2451 SvTEMP_off(src);
59f00321
RGS
2452 if (PL_op->op_private & OPpGREP_LEX)
2453 PAD_SVl(PL_op->op_targ) = src;
2454 else
2455 DEFSV = src;
a0d0e21e
LW
2456
2457 RETURNOP(cLOGOP->op_other);
2458 }
2459}
2460
2461PP(pp_leavesub)
2462{
27da23d5 2463 dVAR; dSP;
a0d0e21e
LW
2464 SV **mark;
2465 SV **newsp;
2466 PMOP *newpm;
2467 I32 gimme;
c09156bb 2468 register PERL_CONTEXT *cx;
b0d9ce38 2469 SV *sv;
a0d0e21e 2470
9850bf21
RH
2471 if (CxMULTICALL(&cxstack[cxstack_ix]))
2472 return 0;
2473
a0d0e21e 2474 POPBLOCK(cx,newpm);
5dd42e15 2475 cxstack_ix++; /* temporarily protect top context */
1c846c1f 2476
a1f49e72 2477 TAINT_NOT;
a0d0e21e
LW
2478 if (gimme == G_SCALAR) {
2479 MARK = newsp + 1;
a29cdaf0 2480 if (MARK <= SP) {
a8bba7fa 2481 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
a29cdaf0
IZ
2482 if (SvTEMP(TOPs)) {
2483 *MARK = SvREFCNT_inc(TOPs);
2484 FREETMPS;
2485 sv_2mortal(*MARK);
cd06dffe
GS
2486 }
2487 else {
959e3673 2488 sv = SvREFCNT_inc(TOPs); /* FREETMPS could clobber it */
a29cdaf0 2489 FREETMPS;
959e3673
GS
2490 *MARK = sv_mortalcopy(sv);
2491 SvREFCNT_dec(sv);
a29cdaf0 2492 }
cd06dffe
GS
2493 }
2494 else
a29cdaf0 2495 *MARK = SvTEMP(TOPs) ? TOPs : sv_mortalcopy(TOPs);
cd06dffe
GS
2496 }
2497 else {
f86702cc 2498 MEXTEND(MARK, 0);
3280af22 2499 *MARK = &PL_sv_undef;
a0d0e21e
LW
2500 }
2501 SP = MARK;
2502 }
54310121 2503 else if (gimme == G_ARRAY) {
f86702cc 2504 for (MARK = newsp + 1; MARK <= SP; MARK++) {
a1f49e72 2505 if (!SvTEMP(*MARK)) {
f86702cc 2506 *MARK = sv_mortalcopy(*MARK);
a1f49e72
CS
2507 TAINT_NOT; /* Each item is independent */
2508 }
f86702cc 2509 }
a0d0e21e 2510 }
f86702cc 2511 PUTBACK;
1c846c1f 2512
5dd42e15
DM
2513 LEAVE;
2514 cxstack_ix--;
b0d9ce38 2515 POPSUB(cx,sv); /* Stack values are safe: release CV and @_ ... */
3280af22 2516 PL_curpm = newpm; /* ... and pop $1 et al */
a0d0e21e 2517
b0d9ce38 2518 LEAVESUB(sv);
f39bc417 2519 return cx->blk_sub.retop;
a0d0e21e
LW
2520}
2521
cd06dffe
GS
2522/* This duplicates the above code because the above code must not
2523 * get any slower by more conditions */
2524PP(pp_leavesublv)
2525{
27da23d5 2526 dVAR; dSP;
cd06dffe
GS
2527 SV **mark;
2528 SV **newsp;
2529 PMOP *newpm;
2530 I32 gimme;
2531 register PERL_CONTEXT *cx;
b0d9ce38 2532 SV *sv;
cd06dffe 2533
9850bf21
RH
2534 if (CxMULTICALL(&cxstack[cxstack_ix]))
2535 return 0;
2536
cd06dffe 2537 POPBLOCK(cx,newpm);
5dd42e15 2538 cxstack_ix++; /* temporarily protect top context */
1c846c1f 2539
cd06dffe
GS
2540 TAINT_NOT;
2541
cc8d50a7 2542 if (cx->blk_sub.lval & OPpENTERSUB_INARGS) {
cd06dffe
GS
2543 /* We are an argument to a function or grep().
2544 * This kind of lvalueness was legal before lvalue
2545 * subroutines too, so be backward compatible:
2546 * cannot report errors. */
2547
2548 /* Scalar context *is* possible, on the LHS of -> only,
2549 * as in f()->meth(). But this is not an lvalue. */
2550 if (gimme == G_SCALAR)
2551 goto temporise;
2552 if (gimme == G_ARRAY) {
a8bba7fa 2553 if (!CvLVALUE(cx->blk_sub.cv))
cd06dffe
GS
2554 goto temporise_array;
2555 EXTEND_MORTAL(SP - newsp);
2556 for (mark = newsp + 1; mark <= SP; mark++) {
2557 if (SvTEMP(*mark))
6f207bd3 2558 NOOP;
cd06dffe
GS
2559 else if (SvFLAGS(*mark) & (SVs_PADTMP | SVf_READONLY))
2560 *mark = sv_mortalcopy(*mark);
2561 else {
2562 /* Can be a localized value subject to deletion. */
2563 PL_tmps_stack[++PL_tmps_ix] = *mark;
b37c2d43 2564 SvREFCNT_inc_void(*mark);
cd06dffe
GS
2565 }
2566 }
2567 }
2568 }
cc8d50a7 2569 else if (cx->blk_sub.lval) { /* Leave it as it is if we can. */
cd06dffe
GS
2570 /* Here we go for robustness, not for speed, so we change all
2571 * the refcounts so the caller gets a live guy. Cannot set
2572 * TEMP, so sv_2mortal is out of question. */
a8bba7fa 2573 if (!CvLVALUE(cx->blk_sub.cv)) {
5dd42e15
DM
2574 LEAVE;
2575 cxstack_ix--;
b0d9ce38 2576 POPSUB(cx,sv);
d470f89e 2577 PL_curpm = newpm;
b0d9ce38 2578 LEAVESUB(sv);
d470f89e
GS
2579 DIE(aTHX_ "Can't modify non-lvalue subroutine call");
2580 }
cd06dffe
GS
2581 if (gimme == G_SCALAR) {
2582 MARK = newsp + 1;
2583 EXTEND_MORTAL(1);
2584 if (MARK == SP) {
f9bc45ef
TP
2585 /* Temporaries are bad unless they happen to be elements
2586 * of a tied hash or array */
2587 if (SvFLAGS(TOPs) & (SVs_TEMP | SVs_PADTMP | SVf_READONLY) &&
2588 !(SvRMAGICAL(TOPs) && mg_find(TOPs, PERL_MAGIC_tiedelem))) {
5dd42e15
DM
2589 LEAVE;
2590 cxstack_ix--;
b0d9ce38 2591 POPSUB(cx,sv);
d470f89e 2592 PL_curpm = newpm;
b0d9ce38 2593 LEAVESUB(sv);
e9f19e3c
HS
2594 DIE(aTHX_ "Can't return %s from lvalue subroutine",
2595 SvREADONLY(TOPs) ? (TOPs == &PL_sv_undef) ? "undef"
2596 : "a readonly value" : "a temporary");
d470f89e 2597 }
cd06dffe
GS
2598 else { /* Can be a localized value
2599 * subject to deletion. */
2600 PL_tmps_stack[++PL_tmps_ix] = *mark;
b37c2d43 2601 SvREFCNT_inc_void(*mark);
cd06dffe
GS
2602 }
2603 }
d470f89e 2604 else { /* Should not happen? */
5dd42e15
DM
2605 LEAVE;
2606 cxstack_ix--;
b0d9ce38 2607 POPSUB(cx,sv);
d470f89e 2608 PL_curpm = newpm;
b0d9ce38 2609 LEAVESUB(sv);
d470f89e 2610 DIE(aTHX_ "%s returned from lvalue subroutine in scalar context",
cd06dffe 2611 (MARK > SP ? "Empty array" : "Array"));
d470f89e 2612 }
cd06dffe
GS
2613 SP = MARK;
2614 }
2615 else if (gimme == G_ARRAY) {
2616 EXTEND_MORTAL(SP - newsp);
2617 for (mark = newsp + 1; mark <= SP; mark++) {
f206cdda
AMS
2618 if (*mark != &PL_sv_undef
2619 && SvFLAGS(*mark) & (SVs_TEMP | SVs_PADTMP | SVf_READONLY)) {
d470f89e
GS
2620 /* Might be flattened array after $#array = */
2621 PUTBACK;
5dd42e15
DM
2622 LEAVE;
2623 cxstack_ix--;
b0d9ce38 2624 POPSUB(cx,sv);
d470f89e 2625 PL_curpm = newpm;
b0d9ce38 2626 LEAVESUB(sv);
f206cdda
AMS
2627 DIE(aTHX_ "Can't return a %s from lvalue subroutine",
2628 SvREADONLY(TOPs) ? "readonly value" : "temporary");
d470f89e 2629 }
cd06dffe 2630 else {
cd06dffe
GS
2631 /* Can be a localized value subject to deletion. */
2632 PL_tmps_stack[++PL_tmps_ix] = *mark;
b37c2d43 2633 SvREFCNT_inc_void(*mark);
cd06dffe
GS
2634 }
2635 }
2636 }
2637 }
2638 else {
2639 if (gimme == G_SCALAR) {
2640 temporise:
2641 MARK = newsp + 1;
2642 if (MARK <= SP) {
a8bba7fa 2643 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
cd06dffe
GS
2644 if (SvTEMP(TOPs)) {
2645 *MARK = SvREFCNT_inc(TOPs);
2646 FREETMPS;
2647 sv_2mortal(*MARK);
2648 }
2649 else {
959e3673 2650 sv = SvREFCNT_inc(TOPs); /* FREETMPS could clobber it */
cd06dffe 2651 FREETMPS;
959e3673
GS
2652 *MARK = sv_mortalcopy(sv);
2653 SvREFCNT_dec(sv);
cd06dffe
GS
2654 }
2655 }
2656 else
2657 *MARK = SvTEMP(TOPs) ? TOPs : sv_mortalcopy(TOPs);
2658 }
2659 else {
2660 MEXTEND(MARK, 0);
2661 *MARK = &PL_sv_undef;
2662 }
2663 SP = MARK;
2664 }
2665 else if (gimme == G_ARRAY) {
2666 temporise_array:
2667 for (MARK = newsp + 1; MARK <= SP; MARK++) {
2668 if (!SvTEMP(*MARK)) {
2669 *MARK = sv_mortalcopy(*MARK);
2670 TAINT_NOT; /* Each item is independent */
2671 }
2672 }
2673 }
2674 }
2675 PUTBACK;
1c846c1f 2676
5dd42e15
DM
2677 LEAVE;
2678 cxstack_ix--;
b0d9ce38 2679 POPSUB(cx,sv); /* Stack values are safe: release CV and @_ ... */
cd06dffe
GS
2680 PL_curpm = newpm; /* ... and pop $1 et al */
2681
b0d9ce38 2682 LEAVESUB(sv);
f39bc417 2683 return cx->blk_sub.retop;
cd06dffe
GS
2684}
2685
a0d0e21e
LW
2686PP(pp_entersub)
2687{
27da23d5 2688 dVAR; dSP; dPOPss;
a0d0e21e 2689 GV *gv;
a0d0e21e 2690 register CV *cv;
c09156bb 2691 register PERL_CONTEXT *cx;
5d94fbed 2692 I32 gimme;
a9c4fd4e 2693 const bool hasargs = (PL_op->op_flags & OPf_STACKED) != 0;
a0d0e21e
LW
2694
2695 if (!sv)
cea2e8a9 2696 DIE(aTHX_ "Not a CODE reference");
a0d0e21e 2697 switch (SvTYPE(sv)) {
f1025168
NC
2698 /* This is overwhelming the most common case: */
2699 case SVt_PVGV:
f730a42d
NC
2700 if (!(cv = GvCVu((GV*)sv))) {
2701 HV *stash;
f2c0649b 2702 cv = sv_2cv(sv, &stash, &gv, 0);
f730a42d 2703 }
f1025168
NC
2704 if (!cv) {
2705 ENTER;
2706 SAVETMPS;
2707 goto try_autoload;
2708 }
2709 break;
a0d0e21e
LW
2710 default:
2711 if (!SvROK(sv)) {
a9c4fd4e 2712 const char *sym;
3280af22 2713 if (sv == &PL_sv_yes) { /* unfound import, ignore */
fb73857a 2714 if (hasargs)
3280af22 2715 SP = PL_stack_base + POPMARK;
a0d0e21e 2716 RETURN;
fb73857a 2717 }
15ff848f
CS
2718 if (SvGMAGICAL(sv)) {
2719 mg_get(sv);
f5f1d18e
AMS
2720 if (SvROK(sv))
2721 goto got_rv;
6136c704 2722 sym = SvPOKp(sv) ? SvPVX_const(sv) : NULL;
15ff848f 2723 }
a9c4fd4e 2724 else {
8b6b16e7 2725 sym = SvPV_nolen_const(sv);
a9c4fd4e 2726 }
15ff848f 2727 if (!sym)
cea2e8a9 2728 DIE(aTHX_ PL_no_usym, "a subroutine");
533c011a 2729 if (PL_op->op_private & HINT_STRICT_REFS)
cea2e8a9 2730 DIE(aTHX_ PL_no_symref, sym, "a subroutine");
864dbfa3 2731 cv = get_cv(sym, TRUE);
a0d0e21e
LW
2732 break;
2733 }
f5f1d18e 2734 got_rv:
f5284f61 2735 {
823a54a3 2736 SV * const * sp = &sv; /* Used in tryAMAGICunDEREF macro. */
f5284f61
IZ
2737 tryAMAGICunDEREF(to_cv);
2738 }
a0d0e21e
LW
2739 cv = (CV*)SvRV(sv);
2740 if (SvTYPE(cv) == SVt_PVCV)
2741 break;
2742 /* FALL THROUGH */
2743 case SVt_PVHV:
2744 case SVt_PVAV:
cea2e8a9 2745 DIE(aTHX_ "Not a CODE reference");
f1025168 2746 /* This is the second most common case: */
a0d0e21e
LW
2747 case SVt_PVCV:
2748 cv = (CV*)sv;
2749 break;
a0d0e21e
LW
2750 }
2751
2752 ENTER;
2753 SAVETMPS;
2754
2755 retry:
a0d0e21e 2756 if (!CvROOT(cv) && !CvXSUB(cv)) {
2f349aa0
NC
2757 GV* autogv;
2758 SV* sub_name;
2759
2760 /* anonymous or undef'd function leaves us no recourse */
2761 if (CvANON(cv) || !(gv = CvGV(cv)))
2762 DIE(aTHX_ "Undefined subroutine called");
2763
2764 /* autoloaded stub? */
2765 if (cv != GvCV(gv)) {
2766 cv = GvCV(gv);
2767 }
2768 /* should call AUTOLOAD now? */
2769 else {
2770try_autoload:
2771 if ((autogv = gv_autoload4(GvSTASH(gv), GvNAME(gv), GvNAMELEN(gv),
2772 FALSE)))
2773 {
2774 cv = GvCV(autogv);
2775 }
2776 /* sorry */
2777 else {
2778 sub_name = sv_newmortal();
6136c704 2779 gv_efullname3(sub_name, gv, NULL);
be2597df 2780 DIE(aTHX_ "Undefined subroutine &%"SVf" called", SVfARG(sub_name));
2f349aa0
NC
2781 }
2782 }
2783 if (!cv)
2784 DIE(aTHX_ "Not a CODE reference");
2785 goto retry;
a0d0e21e
LW
2786 }
2787
54310121 2788 gimme = GIMME_V;
67caa1fe 2789 if ((PL_op->op_private & OPpENTERSUB_DB) && GvCV(PL_DBsub) && !CvNODEBUG(cv)) {
06492da6
SF
2790 if (CvASSERTION(cv) && PL_DBassertion)
2791 sv_setiv(PL_DBassertion, 1);
2792
005a8a35 2793 Perl_get_db_sub(aTHX_ &sv, cv);
a9ef256d
NC
2794 if (CvISXSUB(cv))
2795 PL_curcopdb = PL_curcop;
2796 cv = GvCV(PL_DBsub);
2797
ccafdc96
RGS
2798 if (!cv || (!CvXSUB(cv) && !CvSTART(cv)))
2799 DIE(aTHX_ "No DB::sub routine defined");
67caa1fe 2800 }
a0d0e21e 2801
aed2304a 2802 if (!(CvISXSUB(cv))) {
f1025168 2803 /* This path taken at least 75% of the time */
a0d0e21e
LW
2804 dMARK;
2805 register I32 items = SP - MARK;
0bcc34c2 2806 AV* const padlist = CvPADLIST(cv);
a0d0e21e
LW
2807 PUSHBLOCK(cx, CXt_SUB, MARK);
2808 PUSHSUB(cx);
f39bc417 2809 cx->blk_sub.retop = PL_op->op_next;
a0d0e21e 2810 CvDEPTH(cv)++;
6b35e009
GS
2811 /* XXX This would be a natural place to set C<PL_compcv = cv> so
2812 * that eval'' ops within this sub know the correct lexical space.
a3985cdc
DM
2813 * Owing the speed considerations, we choose instead to search for
2814 * the cv using find_runcv() when calling doeval().
6b35e009 2815 */
3a76ca88
RGS
2816 if (CvDEPTH(cv) >= 2) {
2817 PERL_STACK_OVERFLOW_CHECK();
2818 pad_push(padlist, CvDEPTH(cv));
a0d0e21e 2819 }
3a76ca88
RGS
2820 SAVECOMPPAD();
2821 PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv));
2822 if (hasargs) {
0bcc34c2 2823 AV* const av = (AV*)PAD_SVl(0);
221373f0
GS
2824 if (AvREAL(av)) {
2825 /* @_ is normally not REAL--this should only ever
2826 * happen when DB::sub() calls things that modify @_ */
2827 av_clear(av);
2828 AvREAL_off(av);
2829 AvREIFY_on(av);
2830 }
3280af22 2831 cx->blk_sub.savearray = GvAV(PL_defgv);
b37c2d43 2832 GvAV(PL_defgv) = (AV*)SvREFCNT_inc_simple(av);
dd2155a4 2833 CX_CURPAD_SAVE(cx->blk_sub);
6d4ff0d2 2834 cx->blk_sub.argarray = av;
a0d0e21e
LW
2835 ++MARK;
2836
2837 if (items > AvMAX(av) + 1) {
504618e9 2838 SV **ary = AvALLOC(av);
a0d0e21e
LW
2839 if (AvARRAY(av) != ary) {
2840 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
9c6bc640 2841 AvARRAY(av) = ary;
a0d0e21e
LW
2842 }
2843 if (items > AvMAX(av) + 1) {
2844 AvMAX(av) = items - 1;
2845 Renew(ary,items,SV*);
2846 AvALLOC(av) = ary;
9c6bc640 2847 AvARRAY(av) = ary;
a0d0e21e
LW
2848 }
2849 }
2850 Copy(MARK,AvARRAY(av),items,SV*);
93965878 2851 AvFILLp(av) = items - 1;
1c846c1f 2852
a0d0e21e
LW
2853 while (items--) {
2854 if (*MARK)
2855 SvTEMP_off(*MARK);
2856 MARK++;
2857 }
2858 }
4a925ff6
GS
2859 /* warning must come *after* we fully set up the context
2860 * stuff so that __WARN__ handlers can safely dounwind()
2861 * if they want to
2862 */
2863 if (CvDEPTH(cv) == 100 && ckWARN(WARN_RECURSION)
2864 && !(PERLDB_SUB && cv == GvCV(PL_DBsub)))
2865 sub_crush_depth(cv);
77a005ab 2866#if 0
bf49b057 2867 DEBUG_S(PerlIO_printf(Perl_debug_log,
6c9570dc 2868 "%p entersub returning %p\n", (void*)thr, (void*)CvSTART(cv)));
77a005ab 2869#endif
a0d0e21e
LW
2870 RETURNOP(CvSTART(cv));
2871 }
f1025168 2872 else {
3a76ca88 2873 I32 markix = TOPMARK;
f1025168 2874
3a76ca88 2875 PUTBACK;
f1025168 2876
3a76ca88
RGS
2877 if (!hasargs) {
2878 /* Need to copy @_ to stack. Alternative may be to
2879 * switch stack to @_, and copy return values
2880 * back. This would allow popping @_ in XSUB, e.g.. XXXX */
2881 AV * const av = GvAV(PL_defgv);
2882 const I32 items = AvFILLp(av) + 1; /* @_ is not tieable */
2883
2884 if (items) {
2885 /* Mark is at the end of the stack. */
2886 EXTEND(SP, items);
2887 Copy(AvARRAY(av), SP + 1, items, SV*);
2888 SP += items;
2889 PUTBACK ;
2890 }
2891 }
2892 /* We assume first XSUB in &DB::sub is the called one. */
2893 if (PL_curcopdb) {
2894 SAVEVPTR(PL_curcop);
2895 PL_curcop = PL_curcopdb;
2896 PL_curcopdb = NULL;
2897 }
2898 /* Do we need to open block here? XXXX */
2899 if (CvXSUB(cv)) /* XXX this is supposed to be true */
2900 (void)(*CvXSUB(cv))(aTHX_ cv);
2901
2902 /* Enforce some sanity in scalar context. */
2903 if (gimme == G_SCALAR && ++markix != PL_stack_sp - PL_stack_base ) {
2904 if (markix > PL_stack_sp - PL_stack_base)
2905 *(PL_stack_base + markix) = &PL_sv_undef;
2906 else
2907 *(PL_stack_base + markix) = *PL_stack_sp;
2908 PL_stack_sp = PL_stack_base + markix;
2909 }
f1025168
NC
2910 LEAVE;
2911 return NORMAL;
2912 }
a0d0e21e
LW
2913}
2914
44a8e56a 2915void
864dbfa3 2916Perl_sub_crush_depth(pTHX_ CV *cv)
44a8e56a
PP
2917{
2918 if (CvANON(cv))
9014280d 2919 Perl_warner(aTHX_ packWARN(WARN_RECURSION), "Deep recursion on anonymous subroutine");
44a8e56a 2920 else {
aec46f14 2921 SV* const tmpstr = sv_newmortal();
6136c704 2922 gv_efullname3(tmpstr, CvGV(cv), NULL);
35c1215d 2923 Perl_warner(aTHX_ packWARN(WARN_RECURSION), "Deep recursion on subroutine \"%"SVf"\"",
be2597df 2924 SVfARG(tmpstr));
44a8e56a
PP
2925 }
2926}
2927
a0d0e21e
LW
2928PP(pp_aelem)
2929{
97aff369 2930 dVAR; dSP;
a0d0e21e 2931 SV** svp;
a3b680e6 2932 SV* const elemsv = POPs;
d804643f 2933 IV elem = SvIV(elemsv);
0bcc34c2 2934 AV* const av = (AV*)POPs;
e1ec3a88
AL
2935 const U32 lval = PL_op->op_flags & OPf_MOD || LVRET;
2936 const U32 defer = (PL_op->op_private & OPpLVAL_DEFER) && (elem > av_len(av));
be6c24e0 2937 SV *sv;
a0d0e21e 2938
e35c1634 2939 if (SvROK(elemsv) && !SvGAMAGIC(elemsv) && ckWARN(WARN_MISC))
95b63a38
JH
2940 Perl_warner(aTHX_ packWARN(WARN_MISC),
2941 "Use of reference \"%"SVf"\" as array index",
be2597df 2942 SVfARG(elemsv));
748a9306 2943 if (elem > 0)
fc15ae8f 2944 elem -= CopARYBASE_get(PL_curcop);
a0d0e21e
LW
2945 if (SvTYPE(av) != SVt_PVAV)
2946 RETPUSHUNDEF;
68dc0745 2947 svp = av_fetch(av, elem, lval && !defer);
a0d0e21e 2948 if (lval) {
2b573ace 2949#ifdef PERL_MALLOC_WRAP
2b573ace 2950 if (SvUOK(elemsv)) {
a9c4fd4e 2951 const UV uv = SvUV(elemsv);
2b573ace
JH
2952 elem = uv > IV_MAX ? IV_MAX : uv;
2953 }
2954 else if (SvNOK(elemsv))
2955 elem = (IV)SvNV(elemsv);
a3b680e6
AL
2956 if (elem > 0) {
2957 static const char oom_array_extend[] =
2958 "Out of memory during array extend"; /* Duplicated in av.c */
2b573ace 2959 MEM_WRAP_CHECK_1(elem,SV*,oom_array_extend);
a3b680e6 2960 }
2b573ace 2961#endif
3280af22 2962 if (!svp || *svp == &PL_sv_undef) {
68dc0745
PP
2963 SV* lv;
2964 if (!defer)
cea2e8a9 2965 DIE(aTHX_ PL_no_aelem, elem);
68dc0745
PP
2966 lv = sv_newmortal();
2967 sv_upgrade(lv, SVt_PVLV);
2968 LvTYPE(lv) = 'y';
a0714e2c 2969 sv_magic(lv, NULL, PERL_MAGIC_defelem, NULL, 0);
b37c2d43 2970 LvTARG(lv) = SvREFCNT_inc_simple(av);
68dc0745
PP
2971 LvTARGOFF(lv) = elem;
2972 LvTARGLEN(lv) = 1;
2973 PUSHs(lv);
2974 RETURN;
2975 }
bfc4de9f 2976 if (PL_op->op_private & OPpLVAL_INTRO)
161b7d16 2977 save_aelem(av, elem, svp);
533c011a
NIS
2978 else if (PL_op->op_private & OPpDEREF)
2979 vivify_ref(*svp, PL_op->op_private & OPpDEREF);
a0d0e21e 2980 }
3280af22 2981 sv = (svp ? *svp : &PL_sv_undef);
be6c24e0
GS
2982 if (!lval && SvGMAGICAL(sv)) /* see note in pp_helem() */
2983 sv = sv_mortalcopy(sv);
2984 PUSHs(sv);
a0d0e21e
LW
2985 RETURN;
2986}
2987
02a9e968 2988void
864dbfa3 2989Perl_vivify_ref(pTHX_ SV *sv, U32 to_what)
02a9e968 2990{
5b295bef 2991 SvGETMAGIC(sv);
02a9e968
CS
2992 if (!SvOK(sv)) {
2993 if (SvREADONLY(sv))
cea2e8a9 2994 Perl_croak(aTHX_ PL_no_modify);
5f05dabc
PP
2995 if (SvTYPE(sv) < SVt_RV)
2996 sv_upgrade(sv, SVt_RV);
2997 else if (SvTYPE(sv) >= SVt_PV) {
8bd4d4c5 2998 SvPV_free(sv);
b162af07
SP
2999 SvLEN_set(sv, 0);
3000 SvCUR_set(sv, 0);
5f05dabc 3001 }
68dc0745 3002 switch (to_what) {
5f05dabc 3003 case OPpDEREF_SV:
561b68a9 3004 SvRV_set(sv, newSV(0));
5f05dabc
PP
3005 break;
3006 case OPpDEREF_AV:
b162af07 3007 SvRV_set(sv, (SV*)newAV());
5f05dabc
PP
3008 break;
3009 case OPpDEREF_HV:
b162af07 3010 SvRV_set(sv, (SV*)newHV());
5f05dabc
PP
3011 break;
3012 }
02a9e968
CS
3013 SvROK_on(sv);
3014 SvSETMAGIC(sv);
3015 }
3016}
3017
a0d0e21e
LW
3018PP(pp_method)
3019{
97aff369 3020 dVAR; dSP;
890ce7af 3021 SV* const sv = TOPs;
f5d5a27c
CS
3022
3023 if (SvROK(sv)) {
890ce7af 3024 SV* const rsv = SvRV(sv);
f5d5a27c
CS
3025 if (SvTYPE(rsv) == SVt_PVCV) {
3026 SETs(rsv);
3027 RETURN;
3028 }
3029 }
3030
4608196e 3031 SETs(method_common(sv, NULL));
f5d5a27c
CS
3032 RETURN;
3033}
3034
3035PP(pp_method_named)
3036{
97aff369 3037 dVAR; dSP;
890ce7af 3038 SV* const sv = cSVOP_sv;
c158a4fd 3039 U32 hash = SvSHARED_HASH(sv);
f5d5a27c
CS
3040
3041 XPUSHs(method_common(sv, &hash));
3042 RETURN;
3043}
3044
3045STATIC SV *
3046S_method_common(pTHX_ SV* meth, U32* hashp)
3047{
97aff369 3048 dVAR;
a0d0e21e
LW
3049 SV* ob;
3050 GV* gv;
56304f61 3051 HV* stash;
f5d5a27c 3052 STRLEN namelen;
6136c704 3053 const char* packname = NULL;
a0714e2c 3054 SV *packsv = NULL;
ac91690f 3055 STRLEN packlen;
46c461b5
AL
3056 const char * const name = SvPV_const(meth, namelen);
3057 SV * const sv = *(PL_stack_base + TOPMARK + 1);
f5d5a27c 3058
4f1b7578
SC
3059 if (!sv)
3060 Perl_croak(aTHX_ "Can't call method \"%s\" on an undefined value", name);
3061
5b295bef 3062 SvGETMAGIC(sv);
a0d0e21e 3063 if (SvROK(sv))
16d20bd9 3064 ob = (SV*)SvRV(sv);
a0d0e21e
LW
3065 else {
3066 GV* iogv;
a0d0e21e 3067
af09ea45 3068 /* this isn't a reference */
5c144d81 3069 if(SvOK(sv) && (packname = SvPV_const(sv, packlen))) {
b464bac0 3070 const HE* const he = hv_fetch_ent(PL_stashcache, sv, 0, 0);
081fc587 3071 if (he) {
5e6396ae 3072 stash = INT2PTR(HV*,SvIV(HeVAL(he)));
081fc587
AB
3073 goto fetch;
3074 }
3075 }
3076
a0d0e21e 3077 if (!SvOK(sv) ||
05f5af9a 3078 !(packname) ||
f776e3cd 3079 !(iogv = gv_fetchsv(sv, 0, SVt_PVIO)) ||
a0d0e21e
LW
3080 !(ob=(SV*)GvIO(iogv)))
3081 {
af09ea45 3082 /* this isn't the name of a filehandle either */
1c846c1f 3083 if (!packname ||
fd400ab9 3084 ((UTF8_IS_START(*packname) && DO_UTF8(sv))
b86a2fa7 3085 ? !isIDFIRST_utf8((U8*)packname)
834a4ddd
LW
3086 : !isIDFIRST(*packname)
3087 ))
3088 {
f5d5a27c
CS
3089 Perl_croak(aTHX_ "Can't call method \"%s\" %s", name,
3090 SvOK(sv) ? "without a package or object reference"
3091 : "on an undefined value");
834a4ddd 3092 }
af09ea45
IK
3093 /* assume it's a package name */
3094 stash = gv_stashpvn(packname, packlen, FALSE);
0dae17bd
GS
3095 if (!stash)
3096 packsv = sv;
081fc587 3097 else {
d4c19fe8 3098 SV* const ref = newSViv(PTR2IV(stash));
7e8961ec
AB
3099 hv_store(PL_stashcache, packname, packlen, ref, 0);
3100 }
ac91690f 3101 goto fetch;
a0d0e21e 3102 }
af09ea45 3103 /* it _is_ a filehandle name -- replace with a reference */
3280af22 3104 *(PL_stack_base + TOPMARK + 1) = sv_2mortal(newRV((SV*)iogv));
a0d0e21e
LW
3105 }
3106
af09ea45 3107 /* if we got here, ob should be a reference or a glob */
f0d43078
GS
3108 if (!ob || !(SvOBJECT(ob)
3109 || (SvTYPE(ob) == SVt_PVGV && (ob = (SV*)GvIO((GV*)ob))
3110 && SvOBJECT(ob))))
3111 {
f5d5a27c
CS
3112 Perl_croak(aTHX_ "Can't call method \"%s\" on unblessed reference",
3113 name);
f0d43078 3114 }
a0d0e21e 3115
56304f61 3116 stash = SvSTASH(ob);
a0d0e21e 3117
ac91690f 3118 fetch:
af09ea45
IK
3119 /* NOTE: stash may be null, hope hv_fetch_ent and
3120 gv_fetchmethod can cope (it seems they can) */
3121
f5d5a27c
CS
3122 /* shortcut for simple names */
3123 if (hashp) {
b464bac0 3124 const HE* const he = hv_fetch_ent(stash, meth, 0, *hashp);
f5d5a27c
CS
3125 if (he) {
3126 gv = (GV*)HeVAL(he);
3127 if (isGV(gv) && GvCV(gv) &&
3128 (!GvCVGEN(gv) || GvCVGEN(gv) == PL_sub_generation))
3129 return (SV*)GvCV(gv);
3130 }
3131 }
3132
0dae17bd 3133 gv = gv_fetchmethod(stash ? stash : (HV*)packsv, name);
af09ea45 3134
56304f61 3135 if (!gv) {
af09ea45
IK
3136 /* This code tries to figure out just what went wrong with
3137 gv_fetchmethod. It therefore needs to duplicate a lot of
3138 the internals of that function. We can't move it inside
3139 Perl_gv_fetchmethod_autoload(), however, since that would
3140 cause UNIVERSAL->can("NoSuchPackage::foo") to croak, and we
3141 don't want that.
3142 */
a9c4fd4e 3143 const char* leaf = name;
6136c704 3144 const char* sep = NULL;
a9c4fd4e 3145 const char* p;
56304f61
CS
3146
3147 for (p = name; *p; p++) {
3148 if (*p == '\'')
3149 sep = p, leaf = p + 1;
3150 else if (*p == ':' && *(p + 1) == ':')
3151 sep = p, leaf = p + 2;
3152 }
3153 if (!sep || ((sep - name) == 5 && strnEQ(name, "SUPER", 5))) {
9b9d0b15
NC
3154 /* the method name is unqualified or starts with SUPER:: */
3155 bool need_strlen = 1;
3156 if (sep) {
3157 packname = CopSTASHPV(PL_curcop);
3158 }
3159 else if (stash) {
46c461b5 3160 HEK * const packhek = HvNAME_HEK(stash);
9b9d0b15
NC
3161 if (packhek) {
3162 packname = HEK_KEY(packhek);
3163 packlen = HEK_LEN(packhek);
3164 need_strlen = 0;
3165 } else {
3166 goto croak;
3167 }
3168 }
3169
3170 if (!packname) {
3171 croak:
e27ad1f2
AV
3172 Perl_croak(aTHX_
3173 "Can't use anonymous symbol table for method lookup");
9b9d0b15
NC
3174 }
3175 else if (need_strlen)
e27ad1f2 3176 packlen = strlen(packname);
9b9d0b15 3177
56304f61
CS
3178 }
3179 else {
af09ea45 3180 /* the method name is qualified */
56304f61
CS
3181 packname = name;
3182 packlen = sep - name;
3183 }
af09ea45
IK
3184
3185 /* we're relying on gv_fetchmethod not autovivifying the stash */
3186 if (gv_stashpvn(packname, packlen, FALSE)) {
c1899e02 3187 Perl_croak(aTHX_
af09ea45
IK
3188 "Can't locate object method \"%s\" via package \"%.*s\"",
3189 leaf, (int)packlen, packname);
c1899e02
GS
3190 }
3191 else {
3192 Perl_croak(aTHX_
af09ea45
IK
3193 "Can't locate object method \"%s\" via package \"%.*s\""
3194 " (perhaps you forgot to load \"%.*s\"?)",
3195 leaf, (int)packlen, packname, (int)packlen, packname);
c1899e02 3196 }
56304f61 3197 }
f5d5a27c 3198 return isGV(gv) ? (SV*)GvCV(gv) : (SV*)gv;
a0d0e21e 3199}
241d1a3b
NC
3200
3201/*
3202 * Local variables:
3203 * c-indentation-style: bsd
3204 * c-basic-offset: 4
3205 * indent-tabs-mode: t
3206 * End:
3207 *
37442d52
RGS
3208 * ex: set ts=8 sts=4 sw=4 noet:
3209 */