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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,
b94e2f88 4 * 2000, 2001, 2002, 2003, 2004, 2005, 2006, 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 }
3280af22 123 if (PL_tainting && PL_tainted && !SvTAINTED(left))
a0d0e21e 124 TAINT_NOT;
e26df76a 125 if (PL_op->op_private & OPpASSIGN_CV_TO_GV) {
6136c704 126 SV * const cv = SvRV(left);
e26df76a
NC
127 const U32 cv_type = SvTYPE(cv);
128 const U32 gv_type = SvTYPE(right);
6136c704 129 const bool got_coderef = cv_type == SVt_PVCV || cv_type == SVt_PVFM;
e26df76a
NC
130
131 if (!got_coderef) {
132 assert(SvROK(cv));
133 }
134
135 /* Can do the optimisation if right (LVAUE) is not a typeglob,
136 left (RVALUE) is a reference to something, and we're in void
137 context. */
138 if (!got_coderef && gv_type != SVt_PVGV && GIMME_V == G_VOID) {
139 /* Is the target symbol table currently empty? */
6136c704 140 GV * const gv = gv_fetchsv(right, GV_NOINIT, SVt_PVGV);
bb112e5a 141 if (SvTYPE(gv) != SVt_PVGV && !SvOK(gv)) {
e26df76a
NC
142 /* Good. Create a new proxy constant subroutine in the target.
143 The gv becomes a(nother) reference to the constant. */
144 SV *const value = SvRV(cv);
145
146 SvUPGRADE((SV *)gv, SVt_RV);
147 SvROK_on(gv);
148 SvRV_set(gv, value);
149 SvREFCNT_inc(value);
150 SETs(right);
151 RETURN;
152 }
153 }
154
155 /* Need to fix things up. */
156 if (gv_type != SVt_PVGV) {
157 /* Need to fix GV. */
158 right = (SV*)gv_fetchsv(right, GV_ADD, SVt_PVGV);
159 }
160
161 if (!got_coderef) {
162 /* We've been returned a constant rather than a full subroutine,
163 but they expect a subroutine reference to apply. */
164 ENTER;
165 SvREFCNT_inc(SvRV(cv));
166 /* newCONSTSUB takes a reference count on the passed in SV
167 from us. We set the name to NULL, otherwise we get into
168 all sorts of fun as the reference to our new sub is
169 donated to the GV that we're about to assign to.
170 */
171 SvRV_set(left, (SV *)newCONSTSUB(GvSTASH(right), NULL,
172 SvRV(cv)));
173 SvREFCNT_dec(cv);
174 LEAVE;
e26df76a
NC
175 }
176
177 }
54310121 178 SvSetMagicSV(right, left);
a0d0e21e
LW
179 SETs(right);
180 RETURN;
181}
182
183PP(pp_cond_expr)
184{
97aff369 185 dVAR; dSP;
a0d0e21e 186 if (SvTRUEx(POPs))
1a67a97c 187 RETURNOP(cLOGOP->op_other);
a0d0e21e 188 else
1a67a97c 189 RETURNOP(cLOGOP->op_next);
a0d0e21e
LW
190}
191
192PP(pp_unstack)
193{
97aff369 194 dVAR;
a0d0e21e
LW
195 I32 oldsave;
196 TAINT_NOT; /* Each statement is presumed innocent */
3280af22 197 PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
a0d0e21e 198 FREETMPS;
3280af22 199 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e
LW
200 LEAVE_SCOPE(oldsave);
201 return NORMAL;
202}
203
a0d0e21e
LW
204PP(pp_concat)
205{
97aff369 206 dVAR; dSP; dATARGET; tryAMAGICbin(concat,opASSIGN);
748a9306
LW
207 {
208 dPOPTOPssrl;
8d6d96c1
HS
209 bool lbyte;
210 STRLEN rlen;
a6b599c7
RGS
211 const char *rpv = 0;
212 bool rbyte = FALSE;
a9c4fd4e 213 bool rcopied = FALSE;
8d6d96c1
HS
214
215 if (TARG == right && right != left) {
c75ab21a
RH
216 /* mg_get(right) may happen here ... */
217 rpv = SvPV_const(right, rlen);
218 rbyte = !DO_UTF8(right);
8d6d96c1 219 right = sv_2mortal(newSVpvn(rpv, rlen));
349d4f2f 220 rpv = SvPV_const(right, rlen); /* no point setting UTF-8 here */
db79b45b 221 rcopied = TRUE;
8d6d96c1 222 }
7889fe52 223
8d6d96c1 224 if (TARG != left) {
a9c4fd4e 225 STRLEN llen;
5c144d81 226 const char* const lpv = SvPV_const(left, llen); /* mg_get(left) may happen here */
90f5826e 227 lbyte = !DO_UTF8(left);
8d6d96c1
HS
228 sv_setpvn(TARG, lpv, llen);
229 if (!lbyte)
230 SvUTF8_on(TARG);
231 else
232 SvUTF8_off(TARG);
233 }
234 else { /* TARG == left */
a9c4fd4e 235 STRLEN llen;
5b295bef 236 SvGETMAGIC(left); /* or mg_get(left) may happen here */
c75ab21a
RH
237 if (!SvOK(TARG)) {
238 if (left == right && ckWARN(WARN_UNINITIALIZED))
239 report_uninit(right);
c69006e4 240 sv_setpvn(left, "", 0);
c75ab21a 241 }
10516c54 242 (void)SvPV_nomg_const(left, llen); /* Needed to set UTF8 flag */
90f5826e
ST
243 lbyte = !DO_UTF8(left);
244 if (IN_BYTES)
245 SvUTF8_off(TARG);
8d6d96c1 246 }
a12c0f56 247
c75ab21a
RH
248 /* or mg_get(right) may happen here */
249 if (!rcopied) {
250 rpv = SvPV_const(right, rlen);
251 rbyte = !DO_UTF8(right);
252 }
8d6d96c1
HS
253 if (lbyte != rbyte) {
254 if (lbyte)
255 sv_utf8_upgrade_nomg(TARG);
256 else {
db79b45b
JH
257 if (!rcopied)
258 right = sv_2mortal(newSVpvn(rpv, rlen));
8d6d96c1 259 sv_utf8_upgrade_nomg(right);
349d4f2f 260 rpv = SvPV_const(right, rlen);
69b47968 261 }
a0d0e21e 262 }
8d6d96c1 263 sv_catpvn_nomg(TARG, rpv, rlen);
43ebc500 264
a0d0e21e
LW
265 SETTARG;
266 RETURN;
748a9306 267 }
a0d0e21e
LW
268}
269
270PP(pp_padsv)
271{
97aff369 272 dVAR; dSP; dTARGET;
a0d0e21e 273 XPUSHs(TARG);
533c011a
NIS
274 if (PL_op->op_flags & OPf_MOD) {
275 if (PL_op->op_private & OPpLVAL_INTRO)
dd2155a4 276 SAVECLEARSV(PAD_SVl(PL_op->op_targ));
a62b51b8 277 if (PL_op->op_private & OPpDEREF) {
8ec5e241 278 PUTBACK;
dd2155a4 279 vivify_ref(PAD_SVl(PL_op->op_targ), PL_op->op_private & OPpDEREF);
8ec5e241
NIS
280 SPAGAIN;
281 }
4633a7c4 282 }
a0d0e21e
LW
283 RETURN;
284}
285
286PP(pp_readline)
287{
97aff369 288 dVAR;
f5284f61 289 tryAMAGICunTARGET(iter, 0);
3280af22 290 PL_last_in_gv = (GV*)(*PL_stack_sp--);
8efb3254 291 if (SvTYPE(PL_last_in_gv) != SVt_PVGV) {
1c846c1f 292 if (SvROK(PL_last_in_gv) && SvTYPE(SvRV(PL_last_in_gv)) == SVt_PVGV)
f5284f61 293 PL_last_in_gv = (GV*)SvRV(PL_last_in_gv);
8efb3254 294 else {
f5284f61
IZ
295 dSP;
296 XPUSHs((SV*)PL_last_in_gv);
297 PUTBACK;
cea2e8a9 298 pp_rv2gv();
f5284f61 299 PL_last_in_gv = (GV*)(*PL_stack_sp--);
f5284f61
IZ
300 }
301 }
a0d0e21e
LW
302 return do_readline();
303}
304
305PP(pp_eq)
306{
97aff369 307 dVAR; dSP; tryAMAGICbinSET(eq,0);
4c9fe80f 308#ifndef NV_PRESERVES_UV
0bdaccee 309 if (SvROK(TOPs) && !SvAMAGIC(TOPs) && SvROK(TOPm1s) && !SvAMAGIC(TOPm1s)) {
e61d22ef
NC
310 SP--;
311 SETs(boolSV(SvRV(TOPs) == SvRV(TOPp1s)));
4c9fe80f
AS
312 RETURN;
313 }
314#endif
28e5dec8
JH
315#ifdef PERL_PRESERVE_IVUV
316 SvIV_please(TOPs);
317 if (SvIOK(TOPs)) {
4c9fe80f
AS
318 /* Unless the left argument is integer in range we are going
319 to have to use NV maths. Hence only attempt to coerce the
320 right argument if we know the left is integer. */
28e5dec8
JH
321 SvIV_please(TOPm1s);
322 if (SvIOK(TOPm1s)) {
0bd48802
AL
323 const bool auvok = SvUOK(TOPm1s);
324 const bool buvok = SvUOK(TOPs);
a12c0f56 325
1605159e
NC
326 if (auvok == buvok) { /* ## IV == IV or UV == UV ## */
327 /* Casting IV to UV before comparison isn't going to matter
328 on 2s complement. On 1s complement or sign&magnitude
329 (if we have any of them) it could to make negative zero
330 differ from normal zero. As I understand it. (Need to
331 check - is negative zero implementation defined behaviour
332 anyway?). NWC */
0bd48802
AL
333 const UV buv = SvUVX(POPs);
334 const UV auv = SvUVX(TOPs);
28e5dec8 335
28e5dec8
JH
336 SETs(boolSV(auv == buv));
337 RETURN;
338 }
339 { /* ## Mixed IV,UV ## */
1605159e 340 SV *ivp, *uvp;
28e5dec8 341 IV iv;
28e5dec8 342
1605159e 343 /* == is commutative so doesn't matter which is left or right */
28e5dec8 344 if (auvok) {
1605159e
NC
345 /* top of stack (b) is the iv */
346 ivp = *SP;
347 uvp = *--SP;
348 } else {
349 uvp = *SP;
350 ivp = *--SP;
351 }
352 iv = SvIVX(ivp);
353 if (iv < 0) {
354 /* As uv is a UV, it's >0, so it cannot be == */
355 SETs(&PL_sv_no);
356 RETURN;
357 }
28e5dec8 358 /* we know iv is >= 0 */
1605159e 359 SETs(boolSV((UV)iv == SvUVX(uvp)));
28e5dec8
JH
360 RETURN;
361 }
362 }
363 }
364#endif
a0d0e21e
LW
365 {
366 dPOPnv;
54310121 367 SETs(boolSV(TOPn == value));
a0d0e21e
LW
368 RETURN;
369 }
370}
371
372PP(pp_preinc)
373{
97aff369 374 dVAR; dSP;
f39684df 375 if (SvTYPE(TOPs) >= SVt_PVGV && SvTYPE(TOPs) != SVt_PVLV)
d470f89e 376 DIE(aTHX_ PL_no_modify);
3510b4a1
NC
377 if (!SvREADONLY(TOPs) && SvIOK_notUV(TOPs) && !SvNOK(TOPs) && !SvPOK(TOPs)
378 && SvIVX(TOPs) != IV_MAX)
55497cff 379 {
45977657 380 SvIV_set(TOPs, SvIVX(TOPs) + 1);
55497cff 381 SvFLAGS(TOPs) &= ~(SVp_NOK|SVp_POK);
748a9306 382 }
28e5dec8 383 else /* Do all the PERL_PRESERVE_IVUV conditionals in sv_inc */
748a9306 384 sv_inc(TOPs);
a0d0e21e
LW
385 SvSETMAGIC(TOPs);
386 return NORMAL;
387}
388
389PP(pp_or)
390{
97aff369 391 dVAR; dSP;
a0d0e21e
LW
392 if (SvTRUE(TOPs))
393 RETURN;
394 else {
c960fc3b
SP
395 if (PL_op->op_type == OP_OR)
396 --SP;
a0d0e21e
LW
397 RETURNOP(cLOGOP->op_other);
398 }
399}
400
25a55bd7 401PP(pp_defined)
c963b151 402{
97aff369 403 dVAR; dSP;
6136c704
AL
404 register SV* sv;
405 bool defined;
25a55bd7 406 const int op_type = PL_op->op_type;
6136c704 407 const int is_dor = (op_type == OP_DOR || op_type == OP_DORASSIGN);
c963b151 408
6136c704 409 if (is_dor) {
25a55bd7
SP
410 sv = TOPs;
411 if (!sv || !SvANY(sv)) {
2bd49cfc
NC
412 if (op_type == OP_DOR)
413 --SP;
25a55bd7
SP
414 RETURNOP(cLOGOP->op_other);
415 }
416 } else if (op_type == OP_DEFINED) {
417 sv = POPs;
418 if (!sv || !SvANY(sv))
419 RETPUSHNO;
d9aa96a4 420 } else
52a5c517 421 DIE(aTHX_ "panic: Invalid op (%s) in pp_defined()", OP_NAME(PL_op));
25a55bd7 422
6136c704 423 defined = FALSE;
c963b151
BD
424 switch (SvTYPE(sv)) {
425 case SVt_PVAV:
426 if (AvMAX(sv) >= 0 || SvGMAGICAL(sv) || (SvRMAGICAL(sv) && mg_find(sv, PERL_MAGIC_tied)))
25a55bd7 427 defined = TRUE;
c963b151
BD
428 break;
429 case SVt_PVHV:
430 if (HvARRAY(sv) || SvGMAGICAL(sv) || (SvRMAGICAL(sv) && mg_find(sv, PERL_MAGIC_tied)))
25a55bd7 431 defined = TRUE;
c963b151
BD
432 break;
433 case SVt_PVCV:
434 if (CvROOT(sv) || CvXSUB(sv))
25a55bd7 435 defined = TRUE;
c963b151
BD
436 break;
437 default:
5b295bef 438 SvGETMAGIC(sv);
c963b151 439 if (SvOK(sv))
25a55bd7 440 defined = TRUE;
6136c704 441 break;
c963b151 442 }
6136c704
AL
443
444 if (is_dor) {
c960fc3b
SP
445 if(defined)
446 RETURN;
447 if(op_type == OP_DOR)
448 --SP;
25a55bd7 449 RETURNOP(cLOGOP->op_other);
25a55bd7 450 }
d9aa96a4
SP
451 /* assuming OP_DEFINED */
452 if(defined)
453 RETPUSHYES;
454 RETPUSHNO;
c963b151
BD
455}
456
a0d0e21e
LW
457PP(pp_add)
458{
97aff369 459 dVAR; dSP; dATARGET; bool useleft; tryAMAGICbin(add,opASSIGN);
28e5dec8
JH
460 useleft = USE_LEFT(TOPm1s);
461#ifdef PERL_PRESERVE_IVUV
462 /* We must see if we can perform the addition with integers if possible,
463 as the integer code detects overflow while the NV code doesn't.
464 If either argument hasn't had a numeric conversion yet attempt to get
465 the IV. It's important to do this now, rather than just assuming that
466 it's not IOK as a PV of "9223372036854775806" may not take well to NV
467 addition, and an SV which is NOK, NV=6.0 ought to be coerced to
468 integer in case the second argument is IV=9223372036854775806
469 We can (now) rely on sv_2iv to do the right thing, only setting the
470 public IOK flag if the value in the NV (or PV) slot is truly integer.
471
472 A side effect is that this also aggressively prefers integer maths over
7dca457a
NC
473 fp maths for integer values.
474
a00b5bd3 475 How to detect overflow?
7dca457a
NC
476
477 C 99 section 6.2.6.1 says
478
479 The range of nonnegative values of a signed integer type is a subrange
480 of the corresponding unsigned integer type, and the representation of
481 the same value in each type is the same. A computation involving
482 unsigned operands can never overflow, because a result that cannot be
483 represented by the resulting unsigned integer type is reduced modulo
484 the number that is one greater than the largest value that can be
485 represented by the resulting type.
486
487 (the 9th paragraph)
488
489 which I read as "unsigned ints wrap."
490
491 signed integer overflow seems to be classed as "exception condition"
492
493 If an exceptional condition occurs during the evaluation of an
494 expression (that is, if the result is not mathematically defined or not
495 in the range of representable values for its type), the behavior is
496 undefined.
497
498 (6.5, the 5th paragraph)
499
500 I had assumed that on 2s complement machines signed arithmetic would
501 wrap, hence coded pp_add and pp_subtract on the assumption that
502 everything perl builds on would be happy. After much wailing and
503 gnashing of teeth it would seem that irix64 knows its ANSI spec well,
504 knows that it doesn't need to, and doesn't. Bah. Anyway, the all-
505 unsigned code below is actually shorter than the old code. :-)
506 */
507
28e5dec8
JH
508 SvIV_please(TOPs);
509 if (SvIOK(TOPs)) {
510 /* Unless the left argument is integer in range we are going to have to
511 use NV maths. Hence only attempt to coerce the right argument if
512 we know the left is integer. */
9c5ffd7c
JH
513 register UV auv = 0;
514 bool auvok = FALSE;
7dca457a
NC
515 bool a_valid = 0;
516
28e5dec8 517 if (!useleft) {
7dca457a
NC
518 auv = 0;
519 a_valid = auvok = 1;
520 /* left operand is undef, treat as zero. + 0 is identity,
521 Could SETi or SETu right now, but space optimise by not adding
522 lots of code to speed up what is probably a rarish case. */
523 } else {
524 /* Left operand is defined, so is it IV? */
525 SvIV_please(TOPm1s);
526 if (SvIOK(TOPm1s)) {
527 if ((auvok = SvUOK(TOPm1s)))
528 auv = SvUVX(TOPm1s);
529 else {
a3b680e6 530 register const IV aiv = SvIVX(TOPm1s);
7dca457a
NC
531 if (aiv >= 0) {
532 auv = aiv;
533 auvok = 1; /* Now acting as a sign flag. */
534 } else { /* 2s complement assumption for IV_MIN */
535 auv = (UV)-aiv;
536 }
537 }
538 a_valid = 1;
28e5dec8
JH
539 }
540 }
7dca457a
NC
541 if (a_valid) {
542 bool result_good = 0;
543 UV result;
544 register UV buv;
28e5dec8 545 bool buvok = SvUOK(TOPs);
a00b5bd3 546
7dca457a
NC
547 if (buvok)
548 buv = SvUVX(TOPs);
549 else {
a3b680e6 550 register const IV biv = SvIVX(TOPs);
7dca457a
NC
551 if (biv >= 0) {
552 buv = biv;
553 buvok = 1;
554 } else
555 buv = (UV)-biv;
556 }
557 /* ?uvok if value is >= 0. basically, flagged as UV if it's +ve,
602f51c4 558 else "IV" now, independent of how it came in.
7dca457a
NC
559 if a, b represents positive, A, B negative, a maps to -A etc
560 a + b => (a + b)
561 A + b => -(a - b)
562 a + B => (a - b)
563 A + B => -(a + b)
564 all UV maths. negate result if A negative.
565 add if signs same, subtract if signs differ. */
566
567 if (auvok ^ buvok) {
568 /* Signs differ. */
569 if (auv >= buv) {
570 result = auv - buv;
571 /* Must get smaller */
572 if (result <= auv)
573 result_good = 1;
574 } else {
575 result = buv - auv;
576 if (result <= buv) {
577 /* result really should be -(auv-buv). as its negation
578 of true value, need to swap our result flag */
579 auvok = !auvok;
580 result_good = 1;
28e5dec8
JH
581 }
582 }
7dca457a
NC
583 } else {
584 /* Signs same */
585 result = auv + buv;
586 if (result >= auv)
587 result_good = 1;
588 }
589 if (result_good) {
590 SP--;
591 if (auvok)
28e5dec8 592 SETu( result );
7dca457a
NC
593 else {
594 /* Negate result */
595 if (result <= (UV)IV_MIN)
596 SETi( -(IV)result );
597 else {
598 /* result valid, but out of range for IV. */
599 SETn( -(NV)result );
28e5dec8
JH
600 }
601 }
7dca457a
NC
602 RETURN;
603 } /* Overflow, drop through to NVs. */
28e5dec8
JH
604 }
605 }
606#endif
a0d0e21e 607 {
28e5dec8
JH
608 dPOPnv;
609 if (!useleft) {
610 /* left operand is undef, treat as zero. + 0.0 is identity. */
611 SETn(value);
612 RETURN;
613 }
614 SETn( value + TOPn );
615 RETURN;
a0d0e21e
LW
616 }
617}
618
619PP(pp_aelemfast)
620{
97aff369 621 dVAR; dSP;
c445ea15 622 AV * const av = PL_op->op_flags & OPf_SPECIAL ?
6a077020 623 (AV*)PAD_SV(PL_op->op_targ) : GvAV(cGVOP_gv);
a3b680e6 624 const U32 lval = PL_op->op_flags & OPf_MOD;
0bd48802 625 SV** const svp = av_fetch(av, PL_op->op_private, lval);
3280af22 626 SV *sv = (svp ? *svp : &PL_sv_undef);
6ff81951 627 EXTEND(SP, 1);
be6c24e0
GS
628 if (!lval && SvGMAGICAL(sv)) /* see note in pp_helem() */
629 sv = sv_mortalcopy(sv);
630 PUSHs(sv);
a0d0e21e
LW
631 RETURN;
632}
633
634PP(pp_join)
635{
97aff369 636 dVAR; dSP; dMARK; dTARGET;
a0d0e21e
LW
637 MARK++;
638 do_join(TARG, *MARK, MARK, SP);
639 SP = MARK;
640 SETs(TARG);
641 RETURN;
642}
643
644PP(pp_pushre)
645{
97aff369 646 dVAR; dSP;
44a8e56a
PP
647#ifdef DEBUGGING
648 /*
649 * We ass_u_me that LvTARGOFF() comes first, and that two STRLENs
650 * will be enough to hold an OP*.
651 */
c4420975 652 SV* const sv = sv_newmortal();
44a8e56a
PP
653 sv_upgrade(sv, SVt_PVLV);
654 LvTYPE(sv) = '/';
533c011a 655 Copy(&PL_op, &LvTARGOFF(sv), 1, OP*);
44a8e56a
PP
656 XPUSHs(sv);
657#else
6b88bc9c 658 XPUSHs((SV*)PL_op);
44a8e56a 659#endif
a0d0e21e
LW
660 RETURN;
661}
662
663/* Oversized hot code. */
664
665PP(pp_print)
666{
27da23d5 667 dVAR; dSP; dMARK; dORIGMARK;
a0d0e21e 668 IO *io;
760ac839 669 register PerlIO *fp;
236988e4 670 MAGIC *mg;
0bd48802 671 GV * const gv = (PL_op->op_flags & OPf_STACKED) ? (GV*)*++MARK : PL_defoutgv;
5b468f54
AMS
672
673 if (gv && (io = GvIO(gv))
674 && (mg = SvTIED_mg((SV*)io, PERL_MAGIC_tiedscalar)))
675 {
01bb7c6d 676 had_magic:
68dc0745 677 if (MARK == ORIGMARK) {
1c846c1f 678 /* If using default handle then we need to make space to
a60c0954
NIS
679 * pass object as 1st arg, so move other args up ...
680 */
4352c267 681 MEXTEND(SP, 1);
68dc0745
PP
682 ++MARK;
683 Move(MARK, MARK + 1, (SP - MARK) + 1, SV*);
684 ++SP;
685 }
686 PUSHMARK(MARK - 1);
5b468f54 687 *MARK = SvTIED_obj((SV*)io, mg);
68dc0745 688 PUTBACK;
236988e4 689 ENTER;
864dbfa3 690 call_method("PRINT", G_SCALAR);
236988e4
PP
691 LEAVE;
692 SPAGAIN;
68dc0745
PP
693 MARK = ORIGMARK + 1;
694 *MARK = *SP;
695 SP = MARK;
236988e4
PP
696 RETURN;
697 }
a0d0e21e 698 if (!(io = GvIO(gv))) {
5b468f54
AMS
699 if ((GvEGV(gv)) && (io = GvIO(GvEGV(gv)))
700 && (mg = SvTIED_mg((SV*)io, PERL_MAGIC_tiedscalar)))
01bb7c6d 701 goto had_magic;
2dd78f96
JH
702 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
703 report_evil_fh(gv, io, PL_op->op_type);
93189314 704 SETERRNO(EBADF,RMS_IFI);
a0d0e21e
LW
705 goto just_say_no;
706 }
707 else if (!(fp = IoOFP(io))) {
599cee73 708 if (ckWARN2(WARN_CLOSED, WARN_IO)) {
4c80c0b2
NC
709 if (IoIFP(io))
710 report_evil_fh(gv, io, OP_phoney_INPUT_ONLY);
2dd78f96 711 else if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
bc37a18f 712 report_evil_fh(gv, io, PL_op->op_type);
a0d0e21e 713 }
93189314 714 SETERRNO(EBADF,IoIFP(io)?RMS_FAC:RMS_IFI);
a0d0e21e
LW
715 goto just_say_no;
716 }
717 else {
718 MARK++;
7889fe52 719 if (PL_ofs_sv && SvOK(PL_ofs_sv)) {
a0d0e21e
LW
720 while (MARK <= SP) {
721 if (!do_print(*MARK, fp))
722 break;
723 MARK++;
724 if (MARK <= SP) {
7889fe52 725 if (!do_print(PL_ofs_sv, fp)) { /* $, */
a0d0e21e
LW
726 MARK--;
727 break;
728 }
729 }
730 }
731 }
732 else {
733 while (MARK <= SP) {
734 if (!do_print(*MARK, fp))
735 break;
736 MARK++;
737 }
738 }
739 if (MARK <= SP)
740 goto just_say_no;
741 else {
7889fe52
NIS
742 if (PL_ors_sv && SvOK(PL_ors_sv))
743 if (!do_print(PL_ors_sv, fp)) /* $\ */
a0d0e21e
LW
744 goto just_say_no;
745
746 if (IoFLAGS(io) & IOf_FLUSH)
760ac839 747 if (PerlIO_flush(fp) == EOF)
a0d0e21e
LW
748 goto just_say_no;
749 }
750 }
751 SP = ORIGMARK;
e52fd6f4 752 XPUSHs(&PL_sv_yes);
a0d0e21e
LW
753 RETURN;
754
755 just_say_no:
756 SP = ORIGMARK;
e52fd6f4 757 XPUSHs(&PL_sv_undef);
a0d0e21e
LW
758 RETURN;
759}
760
761PP(pp_rv2av)
762{
97aff369 763 dVAR; dSP; dTOPss;
a0d0e21e
LW
764 AV *av;
765
766 if (SvROK(sv)) {
767 wasref:
f5284f61
IZ
768 tryAMAGICunDEREF(to_av);
769
a0d0e21e
LW
770 av = (AV*)SvRV(sv);
771 if (SvTYPE(av) != SVt_PVAV)
cea2e8a9 772 DIE(aTHX_ "Not an ARRAY reference");
533c011a 773 if (PL_op->op_flags & OPf_REF) {
f5284f61 774 SETs((SV*)av);
a0d0e21e
LW
775 RETURN;
776 }
78f9721b
SM
777 else if (LVRET) {
778 if (GIMME == G_SCALAR)
779 Perl_croak(aTHX_ "Can't return array to lvalue scalar context");
780 SETs((SV*)av);
781 RETURN;
782 }
82d03984
RGS
783 else if (PL_op->op_flags & OPf_MOD
784 && PL_op->op_private & OPpLVAL_INTRO)
785 Perl_croak(aTHX_ PL_no_localize_ref);
a0d0e21e
LW
786 }
787 else {
788 if (SvTYPE(sv) == SVt_PVAV) {
789 av = (AV*)sv;
533c011a 790 if (PL_op->op_flags & OPf_REF) {
f5284f61 791 SETs((SV*)av);
a0d0e21e
LW
792 RETURN;
793 }
78f9721b
SM
794 else if (LVRET) {
795 if (GIMME == G_SCALAR)
796 Perl_croak(aTHX_ "Can't return array to lvalue"
797 " scalar context");
798 SETs((SV*)av);
799 RETURN;
800 }
a0d0e21e
LW
801 }
802 else {
67955e0c 803 GV *gv;
1c846c1f 804
a0d0e21e
LW
805 if (SvTYPE(sv) != SVt_PVGV) {
806 if (SvGMAGICAL(sv)) {
807 mg_get(sv);
808 if (SvROK(sv))
809 goto wasref;
810 }
811 if (!SvOK(sv)) {
533c011a
NIS
812 if (PL_op->op_flags & OPf_REF ||
813 PL_op->op_private & HINT_STRICT_REFS)
cea2e8a9 814 DIE(aTHX_ PL_no_usym, "an ARRAY");
599cee73 815 if (ckWARN(WARN_UNINITIALIZED))
29489e7c 816 report_uninit(sv);
f5284f61 817 if (GIMME == G_ARRAY) {
c2444246 818 (void)POPs;
4633a7c4 819 RETURN;
f5284f61
IZ
820 }
821 RETSETUNDEF;
a0d0e21e 822 }
35cd451c
GS
823 if ((PL_op->op_flags & OPf_SPECIAL) &&
824 !(PL_op->op_flags & OPf_MOD))
825 {
f776e3cd 826 gv = (GV*)gv_fetchsv(sv, 0, SVt_PVAV);
c9d5ac95 827 if (!gv
7a5fd60d 828 && (!is_gv_magical_sv(sv,0)
f776e3cd 829 || !(gv = (GV*)gv_fetchsv(sv, GV_ADD, SVt_PVAV))))
c9d5ac95 830 {
35cd451c 831 RETSETUNDEF;
c9d5ac95 832 }
35cd451c
GS
833 }
834 else {
835 if (PL_op->op_private & HINT_STRICT_REFS)
7a5fd60d 836 DIE(aTHX_ PL_no_symref_sv, sv, "an ARRAY");
f776e3cd 837 gv = (GV*)gv_fetchsv(sv, GV_ADD, SVt_PVAV);
35cd451c
GS
838 }
839 }
840 else {
67955e0c 841 gv = (GV*)sv;
a0d0e21e 842 }
67955e0c 843 av = GvAVn(gv);
533c011a 844 if (PL_op->op_private & OPpLVAL_INTRO)
67955e0c 845 av = save_ary(gv);
533c011a 846 if (PL_op->op_flags & OPf_REF) {
f5284f61 847 SETs((SV*)av);
a0d0e21e
LW
848 RETURN;
849 }
78f9721b
SM
850 else if (LVRET) {
851 if (GIMME == G_SCALAR)
852 Perl_croak(aTHX_ "Can't return array to lvalue"
853 " scalar context");
854 SETs((SV*)av);
855 RETURN;
856 }
a0d0e21e
LW
857 }
858 }
859
860 if (GIMME == G_ARRAY) {
a3b680e6 861 const I32 maxarg = AvFILL(av) + 1;
c2444246 862 (void)POPs; /* XXXX May be optimized away? */
1c846c1f 863 EXTEND(SP, maxarg);
93965878 864 if (SvRMAGICAL(av)) {
1c846c1f 865 U32 i;
eb160463 866 for (i=0; i < (U32)maxarg; i++) {
0bcc34c2 867 SV ** const svp = av_fetch(av, i, FALSE);
547d1dd8
HS
868 /* See note in pp_helem, and bug id #27839 */
869 SP[i+1] = svp
870 ? SvGMAGICAL(*svp) ? sv_mortalcopy(*svp) : *svp
871 : &PL_sv_undef;
93965878 872 }
1c846c1f 873 }
93965878
NIS
874 else {
875 Copy(AvARRAY(av), SP+1, maxarg, SV*);
876 }
a0d0e21e
LW
877 SP += maxarg;
878 }
c754c3d7 879 else if (GIMME_V == G_SCALAR) {
a0d0e21e 880 dTARGET;
a3b680e6 881 const I32 maxarg = AvFILL(av) + 1;
f5284f61 882 SETi(maxarg);
a0d0e21e
LW
883 }
884 RETURN;
885}
886
887PP(pp_rv2hv)
888{
97aff369 889 dVAR; dSP; dTOPss;
a0d0e21e 890 HV *hv;
a3b680e6
AL
891 const I32 gimme = GIMME_V;
892 static const char return_hash_to_lvalue_scalar[] = "Can't return hash to lvalue scalar context";
a0d0e21e
LW
893
894 if (SvROK(sv)) {
895 wasref:
f5284f61
IZ
896 tryAMAGICunDEREF(to_hv);
897
a0d0e21e 898 hv = (HV*)SvRV(sv);
6d822dc4 899 if (SvTYPE(hv) != SVt_PVHV)
cea2e8a9 900 DIE(aTHX_ "Not a HASH reference");
533c011a 901 if (PL_op->op_flags & OPf_REF) {
a0d0e21e
LW
902 SETs((SV*)hv);
903 RETURN;
904 }
78f9721b 905 else if (LVRET) {
be85d344 906 if (gimme != G_ARRAY)
a3b680e6 907 Perl_croak(aTHX_ return_hash_to_lvalue_scalar );
78f9721b
SM
908 SETs((SV*)hv);
909 RETURN;
910 }
82d03984
RGS
911 else if (PL_op->op_flags & OPf_MOD
912 && PL_op->op_private & OPpLVAL_INTRO)
913 Perl_croak(aTHX_ PL_no_localize_ref);
a0d0e21e
LW
914 }
915 else {
6d822dc4 916 if (SvTYPE(sv) == SVt_PVHV) {
a0d0e21e 917 hv = (HV*)sv;
533c011a 918 if (PL_op->op_flags & OPf_REF) {
a0d0e21e
LW
919 SETs((SV*)hv);
920 RETURN;
921 }
78f9721b 922 else if (LVRET) {
be85d344 923 if (gimme != G_ARRAY)
a3b680e6 924 Perl_croak(aTHX_ return_hash_to_lvalue_scalar );
78f9721b
SM
925 SETs((SV*)hv);
926 RETURN;
927 }
a0d0e21e
LW
928 }
929 else {
67955e0c 930 GV *gv;
1c846c1f 931
a0d0e21e
LW
932 if (SvTYPE(sv) != SVt_PVGV) {
933 if (SvGMAGICAL(sv)) {
934 mg_get(sv);
935 if (SvROK(sv))
936 goto wasref;
937 }
938 if (!SvOK(sv)) {
533c011a
NIS
939 if (PL_op->op_flags & OPf_REF ||
940 PL_op->op_private & HINT_STRICT_REFS)
cea2e8a9 941 DIE(aTHX_ PL_no_usym, "a HASH");
599cee73 942 if (ckWARN(WARN_UNINITIALIZED))
29489e7c 943 report_uninit(sv);
be85d344 944 if (gimme == G_ARRAY) {
4633a7c4
LW
945 SP--;
946 RETURN;
947 }
a0d0e21e
LW
948 RETSETUNDEF;
949 }
35cd451c
GS
950 if ((PL_op->op_flags & OPf_SPECIAL) &&
951 !(PL_op->op_flags & OPf_MOD))
952 {
f776e3cd 953 gv = (GV*)gv_fetchsv(sv, 0, SVt_PVHV);
c9d5ac95 954 if (!gv
7a5fd60d 955 && (!is_gv_magical_sv(sv,0)
f776e3cd 956 || !(gv = (GV*)gv_fetchsv(sv, GV_ADD, SVt_PVHV))))
c9d5ac95 957 {
35cd451c 958 RETSETUNDEF;
c9d5ac95 959 }
35cd451c
GS
960 }
961 else {
962 if (PL_op->op_private & HINT_STRICT_REFS)
7a5fd60d 963 DIE(aTHX_ PL_no_symref_sv, sv, "a HASH");
f776e3cd 964 gv = (GV*)gv_fetchsv(sv, GV_ADD, SVt_PVHV);
35cd451c
GS
965 }
966 }
967 else {
67955e0c 968 gv = (GV*)sv;
a0d0e21e 969 }
67955e0c 970 hv = GvHVn(gv);
533c011a 971 if (PL_op->op_private & OPpLVAL_INTRO)
67955e0c 972 hv = save_hash(gv);
533c011a 973 if (PL_op->op_flags & OPf_REF) {
a0d0e21e
LW
974 SETs((SV*)hv);
975 RETURN;
976 }
78f9721b 977 else if (LVRET) {
be85d344 978 if (gimme != G_ARRAY)
a3b680e6 979 Perl_croak(aTHX_ return_hash_to_lvalue_scalar );
78f9721b
SM
980 SETs((SV*)hv);
981 RETURN;
982 }
a0d0e21e
LW
983 }
984 }
985
be85d344 986 if (gimme == G_ARRAY) { /* array wanted */
3280af22 987 *PL_stack_sp = (SV*)hv;
cea2e8a9 988 return do_kv();
a0d0e21e 989 }
be85d344 990 else if (gimme == G_SCALAR) {
a0d0e21e 991 dTARGET;
243d6ab3 992 TARG = Perl_hv_scalar(aTHX_ hv);
a0d0e21e 993 SETTARG;
a0d0e21e 994 }
be85d344 995 RETURN;
a0d0e21e
LW
996}
997
10c8fecd
GS
998STATIC void
999S_do_oddball(pTHX_ HV *hash, SV **relem, SV **firstrelem)
1000{
97aff369 1001 dVAR;
10c8fecd
GS
1002 if (*relem) {
1003 SV *tmpstr;
b464bac0 1004 const HE *didstore;
6d822dc4
MS
1005
1006 if (ckWARN(WARN_MISC)) {
a3b680e6 1007 const char *err;
10c8fecd
GS
1008 if (relem == firstrelem &&
1009 SvROK(*relem) &&
1010 (SvTYPE(SvRV(*relem)) == SVt_PVAV ||
1011 SvTYPE(SvRV(*relem)) == SVt_PVHV))
1012 {
a3b680e6 1013 err = "Reference found where even-sized list expected";
10c8fecd
GS
1014 }
1015 else
a3b680e6
AL
1016 err = "Odd number of elements in hash assignment";
1017 Perl_warner(aTHX_ packWARN(WARN_MISC), err);
10c8fecd 1018 }
6d822dc4 1019
561b68a9 1020 tmpstr = newSV(0);
6d822dc4
MS
1021 didstore = hv_store_ent(hash,*relem,tmpstr,0);
1022 if (SvMAGICAL(hash)) {
1023 if (SvSMAGICAL(tmpstr))
1024 mg_set(tmpstr);
1025 if (!didstore)
1026 sv_2mortal(tmpstr);
1027 }
1028 TAINT_NOT;
10c8fecd
GS
1029 }
1030}
1031
a0d0e21e
LW
1032PP(pp_aassign)
1033{
27da23d5 1034 dVAR; dSP;
3280af22
NIS
1035 SV **lastlelem = PL_stack_sp;
1036 SV **lastrelem = PL_stack_base + POPMARK;
1037 SV **firstrelem = PL_stack_base + POPMARK + 1;
a0d0e21e
LW
1038 SV **firstlelem = lastrelem + 1;
1039
1040 register SV **relem;
1041 register SV **lelem;
1042
1043 register SV *sv;
1044 register AV *ary;
1045
54310121 1046 I32 gimme;
a0d0e21e
LW
1047 HV *hash;
1048 I32 i;
1049 int magic;
ca65944e 1050 int duplicates = 0;
cbbf8932 1051 SV **firsthashrelem = NULL; /* "= 0" keeps gcc 2.95 quiet */
5637b936 1052
a0d0e21e 1053
3280af22 1054 PL_delaymagic = DM_DELAY; /* catch simultaneous items */
ca65944e 1055 gimme = GIMME_V;
a0d0e21e
LW
1056
1057 /* If there's a common identifier on both sides we have to take
1058 * special care that assigning the identifier on the left doesn't
1059 * clobber a value on the right that's used later in the list.
1060 */
10c8fecd 1061 if (PL_op->op_private & (OPpASSIGN_COMMON)) {
cc5e57d2 1062 EXTEND_MORTAL(lastrelem - firstrelem + 1);
10c8fecd 1063 for (relem = firstrelem; relem <= lastrelem; relem++) {
155aba94 1064 if ((sv = *relem)) {
a1f49e72 1065 TAINT_NOT; /* Each item is independent */
10c8fecd 1066 *relem = sv_mortalcopy(sv);
a1f49e72 1067 }
10c8fecd 1068 }
a0d0e21e
LW
1069 }
1070
1071 relem = firstrelem;
1072 lelem = firstlelem;
4608196e
RGS
1073 ary = NULL;
1074 hash = NULL;
10c8fecd 1075
a0d0e21e 1076 while (lelem <= lastlelem) {
bbce6d69 1077 TAINT_NOT; /* Each item stands on its own, taintwise. */
a0d0e21e
LW
1078 sv = *lelem++;
1079 switch (SvTYPE(sv)) {
1080 case SVt_PVAV:
1081 ary = (AV*)sv;
748a9306 1082 magic = SvMAGICAL(ary) != 0;
a0d0e21e 1083 av_clear(ary);
7e42bd57 1084 av_extend(ary, lastrelem - relem);
a0d0e21e
LW
1085 i = 0;
1086 while (relem <= lastrelem) { /* gobble up all the rest */
5117ca91 1087 SV **didstore;
a0d0e21e 1088 assert(*relem);
f2b990bf 1089 sv = newSVsv(*relem);
a0d0e21e 1090 *(relem++) = sv;
5117ca91
GS
1091 didstore = av_store(ary,i++,sv);
1092 if (magic) {
fb73857a
PP
1093 if (SvSMAGICAL(sv))
1094 mg_set(sv);
5117ca91 1095 if (!didstore)
8127e0e3 1096 sv_2mortal(sv);
5117ca91 1097 }
bbce6d69 1098 TAINT_NOT;
a0d0e21e
LW
1099 }
1100 break;
10c8fecd 1101 case SVt_PVHV: { /* normal hash */
a0d0e21e
LW
1102 SV *tmpstr;
1103
1104 hash = (HV*)sv;
748a9306 1105 magic = SvMAGICAL(hash) != 0;
a0d0e21e 1106 hv_clear(hash);
ca65944e 1107 firsthashrelem = relem;
a0d0e21e
LW
1108
1109 while (relem < lastrelem) { /* gobble up all the rest */
5117ca91 1110 HE *didstore;
6136c704
AL
1111 sv = *relem ? *relem : &PL_sv_no;
1112 relem++;
561b68a9 1113 tmpstr = newSV(0);
a0d0e21e
LW
1114 if (*relem)
1115 sv_setsv(tmpstr,*relem); /* value */
1116 *(relem++) = tmpstr;
ca65944e
RGS
1117 if (gimme != G_VOID && hv_exists_ent(hash, sv, 0))
1118 /* key overwrites an existing entry */
1119 duplicates += 2;
5117ca91
GS
1120 didstore = hv_store_ent(hash,sv,tmpstr,0);
1121 if (magic) {
fb73857a
PP
1122 if (SvSMAGICAL(tmpstr))
1123 mg_set(tmpstr);
5117ca91 1124 if (!didstore)
8127e0e3 1125 sv_2mortal(tmpstr);
5117ca91 1126 }
bbce6d69 1127 TAINT_NOT;
8e07c86e 1128 }
6a0deba8 1129 if (relem == lastrelem) {
10c8fecd 1130 do_oddball(hash, relem, firstrelem);
6a0deba8 1131 relem++;
1930e939 1132 }
a0d0e21e
LW
1133 }
1134 break;
1135 default:
6fc92669
GS
1136 if (SvIMMORTAL(sv)) {
1137 if (relem <= lastrelem)
1138 relem++;
1139 break;
a0d0e21e
LW
1140 }
1141 if (relem <= lastrelem) {
1142 sv_setsv(sv, *relem);
1143 *(relem++) = sv;
1144 }
1145 else
3280af22 1146 sv_setsv(sv, &PL_sv_undef);
a0d0e21e
LW
1147 SvSETMAGIC(sv);
1148 break;
1149 }
1150 }
3280af22
NIS
1151 if (PL_delaymagic & ~DM_DELAY) {
1152 if (PL_delaymagic & DM_UID) {
a0d0e21e 1153#ifdef HAS_SETRESUID
fb934a90
RD
1154 (void)setresuid((PL_delaymagic & DM_RUID) ? PL_uid : (Uid_t)-1,
1155 (PL_delaymagic & DM_EUID) ? PL_euid : (Uid_t)-1,
1156 (Uid_t)-1);
56febc5e
AD
1157#else
1158# ifdef HAS_SETREUID
fb934a90
RD
1159 (void)setreuid((PL_delaymagic & DM_RUID) ? PL_uid : (Uid_t)-1,
1160 (PL_delaymagic & DM_EUID) ? PL_euid : (Uid_t)-1);
56febc5e
AD
1161# else
1162# ifdef HAS_SETRUID
b28d0864
NIS
1163 if ((PL_delaymagic & DM_UID) == DM_RUID) {
1164 (void)setruid(PL_uid);
1165 PL_delaymagic &= ~DM_RUID;
a0d0e21e 1166 }
56febc5e
AD
1167# endif /* HAS_SETRUID */
1168# ifdef HAS_SETEUID
b28d0864 1169 if ((PL_delaymagic & DM_UID) == DM_EUID) {
fb934a90 1170 (void)seteuid(PL_euid);
b28d0864 1171 PL_delaymagic &= ~DM_EUID;
a0d0e21e 1172 }
56febc5e 1173# endif /* HAS_SETEUID */
b28d0864
NIS
1174 if (PL_delaymagic & DM_UID) {
1175 if (PL_uid != PL_euid)
cea2e8a9 1176 DIE(aTHX_ "No setreuid available");
b28d0864 1177 (void)PerlProc_setuid(PL_uid);
a0d0e21e 1178 }
56febc5e
AD
1179# endif /* HAS_SETREUID */
1180#endif /* HAS_SETRESUID */
d8eceb89
JH
1181 PL_uid = PerlProc_getuid();
1182 PL_euid = PerlProc_geteuid();
a0d0e21e 1183 }
3280af22 1184 if (PL_delaymagic & DM_GID) {
a0d0e21e 1185#ifdef HAS_SETRESGID
fb934a90
RD
1186 (void)setresgid((PL_delaymagic & DM_RGID) ? PL_gid : (Gid_t)-1,
1187 (PL_delaymagic & DM_EGID) ? PL_egid : (Gid_t)-1,
1188 (Gid_t)-1);
56febc5e
AD
1189#else
1190# ifdef HAS_SETREGID
fb934a90
RD
1191 (void)setregid((PL_delaymagic & DM_RGID) ? PL_gid : (Gid_t)-1,
1192 (PL_delaymagic & DM_EGID) ? PL_egid : (Gid_t)-1);
56febc5e
AD
1193# else
1194# ifdef HAS_SETRGID
b28d0864
NIS
1195 if ((PL_delaymagic & DM_GID) == DM_RGID) {
1196 (void)setrgid(PL_gid);
1197 PL_delaymagic &= ~DM_RGID;
a0d0e21e 1198 }
56febc5e
AD
1199# endif /* HAS_SETRGID */
1200# ifdef HAS_SETEGID
b28d0864 1201 if ((PL_delaymagic & DM_GID) == DM_EGID) {
fb934a90 1202 (void)setegid(PL_egid);
b28d0864 1203 PL_delaymagic &= ~DM_EGID;
a0d0e21e 1204 }
56febc5e 1205# endif /* HAS_SETEGID */
b28d0864
NIS
1206 if (PL_delaymagic & DM_GID) {
1207 if (PL_gid != PL_egid)
cea2e8a9 1208 DIE(aTHX_ "No setregid available");
b28d0864 1209 (void)PerlProc_setgid(PL_gid);
a0d0e21e 1210 }
56febc5e
AD
1211# endif /* HAS_SETREGID */
1212#endif /* HAS_SETRESGID */
d8eceb89
JH
1213 PL_gid = PerlProc_getgid();
1214 PL_egid = PerlProc_getegid();
a0d0e21e 1215 }
3280af22 1216 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
a0d0e21e 1217 }
3280af22 1218 PL_delaymagic = 0;
54310121 1219
54310121
PP
1220 if (gimme == G_VOID)
1221 SP = firstrelem - 1;
1222 else if (gimme == G_SCALAR) {
1223 dTARGET;
1224 SP = firstrelem;
ca65944e 1225 SETi(lastrelem - firstrelem + 1 - duplicates);
54310121
PP
1226 }
1227 else {
ca65944e 1228 if (ary)
a0d0e21e 1229 SP = lastrelem;
ca65944e
RGS
1230 else if (hash) {
1231 if (duplicates) {
1232 /* Removes from the stack the entries which ended up as
1233 * duplicated keys in the hash (fix for [perl #24380]) */
1234 Move(firsthashrelem + duplicates,
1235 firsthashrelem, duplicates, SV**);
1236 lastrelem -= duplicates;
1237 }
1238 SP = lastrelem;
1239 }
a0d0e21e
LW
1240 else
1241 SP = firstrelem + (lastlelem - firstlelem);
0c8c7a05 1242 lelem = firstlelem + (relem - firstrelem);
5f05dabc 1243 while (relem <= SP)
3280af22 1244 *relem++ = (lelem <= lastlelem) ? *lelem++ : &PL_sv_undef;
a0d0e21e 1245 }
54310121 1246 RETURN;
a0d0e21e
LW
1247}
1248
8782bef2
GB
1249PP(pp_qr)
1250{
97aff369 1251 dVAR; dSP;
c4420975
AL
1252 register PMOP * const pm = cPMOP;
1253 SV * const rv = sv_newmortal();
1254 SV * const sv = newSVrv(rv, "Regexp");
e08e52cf
AMS
1255 if (pm->op_pmdynflags & PMdf_TAINTED)
1256 SvTAINTED_on(rv);
aaa362c4 1257 sv_magic(sv,(SV*)ReREFCNT_inc(PM_GETRE(pm)), PERL_MAGIC_qr,0,0);
8782bef2
GB
1258 RETURNX(PUSHs(rv));
1259}
1260
a0d0e21e
LW
1261PP(pp_match)
1262{
97aff369 1263 dVAR; dSP; dTARG;
a0d0e21e 1264 register PMOP *pm = cPMOP;
d65afb4b 1265 PMOP *dynpm = pm;
0d46e09a
SP
1266 register const char *t;
1267 register const char *s;
5c144d81 1268 const char *strend;
a0d0e21e 1269 I32 global;
f722798b 1270 I32 r_flags = REXEC_CHECKED;
5c144d81 1271 const char *truebase; /* Start of string */
aaa362c4 1272 register REGEXP *rx = PM_GETRE(pm);
b3eb6a9b 1273 bool rxtainted;
a3b680e6 1274 const I32 gimme = GIMME;
a0d0e21e 1275 STRLEN len;
748a9306 1276 I32 minmatch = 0;
a3b680e6 1277 const I32 oldsave = PL_savestack_ix;
f86702cc 1278 I32 update_minmatch = 1;
e60df1fa 1279 I32 had_zerolen = 0;
a0d0e21e 1280
533c011a 1281 if (PL_op->op_flags & OPf_STACKED)
a0d0e21e 1282 TARG = POPs;
59f00321
RGS
1283 else if (PL_op->op_private & OPpTARGET_MY)
1284 GETTARGET;
a0d0e21e 1285 else {
54b9620d 1286 TARG = DEFSV;
a0d0e21e
LW
1287 EXTEND(SP,1);
1288 }
d9f424b2 1289
c277df42 1290 PUTBACK; /* EVAL blocks need stack_sp. */
5c144d81 1291 s = SvPV_const(TARG, len);
a0d0e21e 1292 if (!s)
2269b42e 1293 DIE(aTHX_ "panic: pp_match");
890ce7af 1294 strend = s + len;
b3eb6a9b 1295 rxtainted = ((pm->op_pmdynflags & PMdf_TAINTED) ||
3280af22 1296 (PL_tainted && (pm->op_pmflags & PMf_RETAINT)));
9212bbba 1297 TAINT_NOT;
a0d0e21e 1298
a30b2f1f 1299 RX_MATCH_UTF8_set(rx, DO_UTF8(TARG));
d9f424b2 1300
d65afb4b 1301 /* PMdf_USED is set after a ?? matches once */
48c036b1 1302 if (pm->op_pmdynflags & PMdf_USED) {
c277df42 1303 failure:
a0d0e21e
LW
1304 if (gimme == G_ARRAY)
1305 RETURN;
1306 RETPUSHNO;
1307 }
1308
d65afb4b 1309 /* empty pattern special-cased to use last successful pattern if possible */
3280af22
NIS
1310 if (!rx->prelen && PL_curpm) {
1311 pm = PL_curpm;
aaa362c4 1312 rx = PM_GETRE(pm);
a0d0e21e 1313 }
d65afb4b 1314
eb160463 1315 if (rx->minlen > (I32)len)
d65afb4b 1316 goto failure;
c277df42 1317
a0d0e21e 1318 truebase = t = s;
ad94a511
IZ
1319
1320 /* XXXX What part of this is needed with true \G-support? */
d65afb4b 1321 if ((global = dynpm->op_pmflags & PMf_GLOBAL)) {
cf93c79d 1322 rx->startp[0] = -1;
a0d0e21e 1323 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
c445ea15 1324 MAGIC* const mg = mg_find(TARG, PERL_MAGIC_regex_global);
565764a8 1325 if (mg && mg->mg_len >= 0) {
b7a35066 1326 if (!(rx->reganch & ROPT_GPOS_SEEN))
1c846c1f 1327 rx->endp[0] = rx->startp[0] = mg->mg_len;
0ef3e39e
HS
1328 else if (rx->reganch & ROPT_ANCH_GPOS) {
1329 r_flags |= REXEC_IGNOREPOS;
1c846c1f 1330 rx->endp[0] = rx->startp[0] = mg->mg_len;
0ef3e39e 1331 }
748a9306 1332 minmatch = (mg->mg_flags & MGf_MINMATCH);
f86702cc 1333 update_minmatch = 0;
748a9306 1334 }
a0d0e21e
LW
1335 }
1336 }
14977893 1337 if ((!global && rx->nparens)
0b78c20a 1338 || SvTEMP(TARG) || PL_sawampersand || (pm->op_pmflags & PMf_EVAL))
14977893 1339 r_flags |= REXEC_COPY_STR;
1c846c1f 1340 if (SvSCREAM(TARG))
22e551b9
IZ
1341 r_flags |= REXEC_SCREAM;
1342
a0d0e21e 1343play_it_again:
cf93c79d
IZ
1344 if (global && rx->startp[0] != -1) {
1345 t = s = rx->endp[0] + truebase;
d9f97599 1346 if ((s + rx->minlen) > strend)
a0d0e21e 1347 goto nope;
f86702cc 1348 if (update_minmatch++)
e60df1fa 1349 minmatch = had_zerolen;
a0d0e21e 1350 }
60aeb6fd
NIS
1351 if (rx->reganch & RE_USE_INTUIT &&
1352 DO_UTF8(TARG) == ((rx->reganch & ROPT_UTF8) != 0)) {
5c144d81
NC
1353 /* FIXME - can PL_bostr be made const char *? */
1354 PL_bostr = (char *)truebase;
1355 s = CALLREG_INTUIT_START(aTHX_ rx, TARG, (char *)s, (char *)strend, r_flags, NULL);
f722798b
IZ
1356
1357 if (!s)
1358 goto nope;
1359 if ( (rx->reganch & ROPT_CHECK_ALL)
14977893 1360 && !PL_sawampersand
f722798b
IZ
1361 && ((rx->reganch & ROPT_NOSCAN)
1362 || !((rx->reganch & RE_INTUIT_TAIL)
05b4157f
GS
1363 && (r_flags & REXEC_SCREAM)))
1364 && !SvROK(TARG)) /* Cannot trust since INTUIT cannot guess ^ */
f722798b 1365 goto yup;
a0d0e21e 1366 }
5c144d81 1367 if (CALLREGEXEC(aTHX_ rx, (char*)s, (char *)strend, (char*)truebase, minmatch, TARG, NULL, r_flags))
bbce6d69 1368 {
3280af22 1369 PL_curpm = pm;
d65afb4b
HS
1370 if (dynpm->op_pmflags & PMf_ONCE)
1371 dynpm->op_pmdynflags |= PMdf_USED;
a0d0e21e
LW
1372 goto gotcha;
1373 }
1374 else
1375 goto ret_no;
1376 /*NOTREACHED*/
1377
1378 gotcha:
72311751
GS
1379 if (rxtainted)
1380 RX_MATCH_TAINTED_on(rx);
1381 TAINT_IF(RX_MATCH_TAINTED(rx));
a0d0e21e 1382 if (gimme == G_ARRAY) {
a3b680e6
AL
1383 const I32 nparens = rx->nparens;
1384 I32 i = (global && !nparens) ? 1 : 0;
a0d0e21e 1385
c277df42 1386 SPAGAIN; /* EVAL blocks could move the stack. */
ffc61ed2
JH
1387 EXTEND(SP, nparens + i);
1388 EXTEND_MORTAL(nparens + i);
1389 for (i = !i; i <= nparens; i++) {
a0d0e21e 1390 PUSHs(sv_newmortal());
cf93c79d 1391 if ((rx->startp[i] != -1) && rx->endp[i] != -1 ) {
b464bac0 1392 const I32 len = rx->endp[i] - rx->startp[i];
289555fe 1393 s = rx->startp[i] + truebase;
290deeac
A
1394 if (rx->endp[i] < 0 || rx->startp[i] < 0 ||
1395 len < 0 || len > strend - s)
1396 DIE(aTHX_ "panic: pp_match start/end pointers");
a0d0e21e 1397 sv_setpvn(*SP, s, len);
cce850e4 1398 if (DO_UTF8(TARG) && is_utf8_string((U8*)s, len))
a197cbdd 1399 SvUTF8_on(*SP);
a0d0e21e
LW
1400 }
1401 }
1402 if (global) {
d65afb4b 1403 if (dynpm->op_pmflags & PMf_CONTINUE) {
6136c704 1404 MAGIC* mg = NULL;
0af80b60
HS
1405 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG))
1406 mg = mg_find(TARG, PERL_MAGIC_regex_global);
1407 if (!mg) {
6136c704 1408 sv_magic(TARG, NULL, PERL_MAGIC_regex_global, NULL, 0);
0af80b60
HS
1409 mg = mg_find(TARG, PERL_MAGIC_regex_global);
1410 }
1411 if (rx->startp[0] != -1) {
1412 mg->mg_len = rx->endp[0];
1413 if (rx->startp[0] == rx->endp[0])
1414 mg->mg_flags |= MGf_MINMATCH;
1415 else
1416 mg->mg_flags &= ~MGf_MINMATCH;
1417 }
1418 }
cf93c79d
IZ
1419 had_zerolen = (rx->startp[0] != -1
1420 && rx->startp[0] == rx->endp[0]);
c277df42 1421 PUTBACK; /* EVAL blocks may use stack */
cf93c79d 1422 r_flags |= REXEC_IGNOREPOS | REXEC_NOT_FIRST;
a0d0e21e
LW
1423 goto play_it_again;
1424 }
ffc61ed2 1425 else if (!nparens)
bde848c5 1426 XPUSHs(&PL_sv_yes);
4633a7c4 1427 LEAVE_SCOPE(oldsave);
a0d0e21e
LW
1428 RETURN;
1429 }
1430 else {
1431 if (global) {
cbbf8932 1432 MAGIC* mg;
a0d0e21e 1433 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG))
14befaf4 1434 mg = mg_find(TARG, PERL_MAGIC_regex_global);
cbbf8932
AL
1435 else
1436 mg = NULL;
a0d0e21e 1437 if (!mg) {
6136c704 1438 sv_magic(TARG, NULL, PERL_MAGIC_regex_global, NULL, 0);
14befaf4 1439 mg = mg_find(TARG, PERL_MAGIC_regex_global);
a0d0e21e 1440 }
cf93c79d
IZ
1441 if (rx->startp[0] != -1) {
1442 mg->mg_len = rx->endp[0];
d9f97599 1443 if (rx->startp[0] == rx->endp[0])
748a9306
LW
1444 mg->mg_flags |= MGf_MINMATCH;
1445 else
1446 mg->mg_flags &= ~MGf_MINMATCH;
1447 }
a0d0e21e 1448 }
4633a7c4 1449 LEAVE_SCOPE(oldsave);
a0d0e21e
LW
1450 RETPUSHYES;
1451 }
1452
f722798b 1453yup: /* Confirmed by INTUIT */
72311751
GS
1454 if (rxtainted)
1455 RX_MATCH_TAINTED_on(rx);
1456 TAINT_IF(RX_MATCH_TAINTED(rx));
3280af22 1457 PL_curpm = pm;
d65afb4b
HS
1458 if (dynpm->op_pmflags & PMf_ONCE)
1459 dynpm->op_pmdynflags |= PMdf_USED;
cf93c79d
IZ
1460 if (RX_MATCH_COPIED(rx))
1461 Safefree(rx->subbeg);
1462 RX_MATCH_COPIED_off(rx);
6136c704 1463 rx->subbeg = NULL;
a0d0e21e 1464 if (global) {
5c144d81
NC
1465 /* FIXME - should rx->subbeg be const char *? */
1466 rx->subbeg = (char *) truebase;
cf93c79d 1467 rx->startp[0] = s - truebase;
a30b2f1f 1468 if (RX_MATCH_UTF8(rx)) {
0bcc34c2 1469 char * const t = (char*)utf8_hop((U8*)s, rx->minlen);
60aeb6fd
NIS
1470 rx->endp[0] = t - truebase;
1471 }
1472 else {
1473 rx->endp[0] = s - truebase + rx->minlen;
1474 }
cf93c79d 1475 rx->sublen = strend - truebase;
a0d0e21e 1476 goto gotcha;
1c846c1f 1477 }
14977893
JH
1478 if (PL_sawampersand) {
1479 I32 off;
f8c7b90f 1480#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
1481 if (SvIsCOW(TARG) || (SvFLAGS(TARG) & CAN_COW_MASK) == CAN_COW_FLAGS) {
1482 if (DEBUG_C_TEST) {
1483 PerlIO_printf(Perl_debug_log,
1484 "Copy on write: pp_match $& capture, type %d, truebase=%p, t=%p, difference %d\n",
1485 (int) SvTYPE(TARG), truebase, t,
1486 (int)(t-truebase));
1487 }
1488 rx->saved_copy = sv_setsv_cow(rx->saved_copy, TARG);
555831ce 1489 rx->subbeg = (char *) SvPVX_const(rx->saved_copy) + (t - truebase);
ed252734
NC
1490 assert (SvPOKp(rx->saved_copy));
1491 } else
1492#endif
1493 {
14977893 1494
ed252734 1495 rx->subbeg = savepvn(t, strend - t);
f8c7b90f 1496#ifdef PERL_OLD_COPY_ON_WRITE
a0714e2c 1497 rx->saved_copy = NULL;
ed252734
NC
1498#endif
1499 }
14977893
JH
1500 rx->sublen = strend - t;
1501 RX_MATCH_COPIED_on(rx);
1502 off = rx->startp[0] = s - t;
1503 rx->endp[0] = off + rx->minlen;
1504 }
1505 else { /* startp/endp are used by @- @+. */
1506 rx->startp[0] = s - truebase;
1507 rx->endp[0] = s - truebase + rx->minlen;
1508 }
2d862feb 1509 rx->nparens = rx->lastparen = rx->lastcloseparen = 0; /* used by @-, @+, and $^N */
4633a7c4 1510 LEAVE_SCOPE(oldsave);
a0d0e21e
LW
1511 RETPUSHYES;
1512
1513nope:
a0d0e21e 1514ret_no:
d65afb4b 1515 if (global && !(dynpm->op_pmflags & PMf_CONTINUE)) {
a0d0e21e 1516 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
6136c704 1517 MAGIC* const mg = mg_find(TARG, PERL_MAGIC_regex_global);
a0d0e21e 1518 if (mg)
565764a8 1519 mg->mg_len = -1;
a0d0e21e
LW
1520 }
1521 }
4633a7c4 1522 LEAVE_SCOPE(oldsave);
a0d0e21e
LW
1523 if (gimme == G_ARRAY)
1524 RETURN;
1525 RETPUSHNO;
1526}
1527
1528OP *
864dbfa3 1529Perl_do_readline(pTHX)
a0d0e21e 1530{
27da23d5 1531 dVAR; dSP; dTARGETSTACKED;
a0d0e21e
LW
1532 register SV *sv;
1533 STRLEN tmplen = 0;
1534 STRLEN offset;
760ac839 1535 PerlIO *fp;
a3b680e6
AL
1536 register IO * const io = GvIO(PL_last_in_gv);
1537 register const I32 type = PL_op->op_type;
1538 const I32 gimme = GIMME_V;
a0d0e21e 1539
6136c704
AL
1540 if (io) {
1541 MAGIC * const mg = SvTIED_mg((SV*)io, PERL_MAGIC_tiedscalar);
1542 if (mg) {
1543 PUSHMARK(SP);
1544 XPUSHs(SvTIED_obj((SV*)io, mg));
1545 PUTBACK;
1546 ENTER;
1547 call_method("READLINE", gimme);
1548 LEAVE;
1549 SPAGAIN;
1550 if (gimme == G_SCALAR) {
1551 SV* const result = POPs;
1552 SvSetSV_nosteal(TARG, result);
1553 PUSHTARG;
1554 }
1555 RETURN;
0b7c7b4f 1556 }
e79b0511 1557 }
4608196e 1558 fp = NULL;
a0d0e21e
LW
1559 if (io) {
1560 fp = IoIFP(io);
1561 if (!fp) {
1562 if (IoFLAGS(io) & IOf_ARGV) {
1563 if (IoFLAGS(io) & IOf_START) {
a0d0e21e 1564 IoLINES(io) = 0;
3280af22 1565 if (av_len(GvAVn(PL_last_in_gv)) < 0) {
1d7c1841 1566 IoFLAGS(io) &= ~IOf_START;
4608196e 1567 do_open(PL_last_in_gv,"-",1,FALSE,O_RDONLY,0,NULL);
c69033f2 1568 sv_setpvn(GvSVn(PL_last_in_gv), "-", 1);
3280af22 1569 SvSETMAGIC(GvSV(PL_last_in_gv));
a2008d6d
GS
1570 fp = IoIFP(io);
1571 goto have_fp;
a0d0e21e
LW
1572 }
1573 }
3280af22 1574 fp = nextargv(PL_last_in_gv);
a0d0e21e 1575 if (!fp) { /* Note: fp != IoIFP(io) */
3280af22 1576 (void)do_close(PL_last_in_gv, FALSE); /* now it does*/
a0d0e21e
LW
1577 }
1578 }
0d44d22b
NC
1579 else if (type == OP_GLOB)
1580 fp = Perl_start_glob(aTHX_ POPs, io);
a0d0e21e
LW
1581 }
1582 else if (type == OP_GLOB)
1583 SP--;
a00b5bd3 1584 else if (ckWARN(WARN_IO) && IoTYPE(io) == IoTYPE_WRONLY) {
4c80c0b2 1585 report_evil_fh(PL_last_in_gv, io, OP_phoney_OUTPUT_ONLY);
a00b5bd3 1586 }
a0d0e21e
LW
1587 }
1588 if (!fp) {
041457d9
DM
1589 if ((!io || !(IoFLAGS(io) & IOf_START))
1590 && ckWARN2(WARN_GLOB, WARN_CLOSED))
1591 {
3f4520fe 1592 if (type == OP_GLOB)
9014280d 1593 Perl_warner(aTHX_ packWARN(WARN_GLOB),
af8c498a
GS
1594 "glob failed (can't start child: %s)",
1595 Strerror(errno));
69282e91 1596 else
bc37a18f 1597 report_evil_fh(PL_last_in_gv, io, PL_op->op_type);
3f4520fe 1598 }
54310121 1599 if (gimme == G_SCALAR) {
79628082 1600 /* undef TARG, and push that undefined value */
ba92458f
AE
1601 if (type != OP_RCATLINE) {
1602 SV_CHECK_THINKFIRST_COW_DROP(TARG);
0c34ef67 1603 SvOK_off(TARG);
ba92458f 1604 }
a0d0e21e
LW
1605 PUSHTARG;
1606 }
1607 RETURN;
1608 }
a2008d6d 1609 have_fp:
54310121 1610 if (gimme == G_SCALAR) {
a0d0e21e 1611 sv = TARG;
9607fc9c
PP
1612 if (SvROK(sv))
1613 sv_unref(sv);
862a34c6 1614 SvUPGRADE(sv, SVt_PV);
a0d0e21e 1615 tmplen = SvLEN(sv); /* remember if already alloced */
bc44a8a2 1616 if (!tmplen && !SvREADONLY(sv))
a0d0e21e 1617 Sv_Grow(sv, 80); /* try short-buffering it */
2b5e58c4
AMS
1618 offset = 0;
1619 if (type == OP_RCATLINE && SvOK(sv)) {
1620 if (!SvPOK(sv)) {
8b6b16e7 1621 SvPV_force_nolen(sv);
2b5e58c4 1622 }
a0d0e21e 1623 offset = SvCUR(sv);
2b5e58c4 1624 }
a0d0e21e 1625 }
54310121 1626 else {
561b68a9 1627 sv = sv_2mortal(newSV(80));
54310121
PP
1628 offset = 0;
1629 }
fbad3eb5 1630
3887d568
AP
1631 /* This should not be marked tainted if the fp is marked clean */
1632#define MAYBE_TAINT_LINE(io, sv) \
1633 if (!(IoFLAGS(io) & IOf_UNTAINT)) { \
1634 TAINT; \
1635 SvTAINTED_on(sv); \
1636 }
1637
684bef36 1638/* delay EOF state for a snarfed empty file */
fbad3eb5 1639#define SNARF_EOF(gimme,rs,io,sv) \
684bef36 1640 (gimme != G_SCALAR || SvCUR(sv) \
b9fee9ba 1641 || (IoFLAGS(io) & IOf_NOLINE) || !RsSNARF(rs))
fbad3eb5 1642
a0d0e21e 1643 for (;;) {
09e8efcc 1644 PUTBACK;
fbad3eb5 1645 if (!sv_gets(sv, fp, offset)
2d726892
TF
1646 && (type == OP_GLOB
1647 || SNARF_EOF(gimme, PL_rs, io, sv)
1648 || PerlIO_error(fp)))
fbad3eb5 1649 {
760ac839 1650 PerlIO_clearerr(fp);
a0d0e21e 1651 if (IoFLAGS(io) & IOf_ARGV) {
3280af22 1652 fp = nextargv(PL_last_in_gv);
a0d0e21e
LW
1653 if (fp)
1654 continue;
3280af22 1655 (void)do_close(PL_last_in_gv, FALSE);
a0d0e21e
LW
1656 }
1657 else if (type == OP_GLOB) {
e476b1b5 1658 if (!do_close(PL_last_in_gv, FALSE) && ckWARN(WARN_GLOB)) {
9014280d 1659 Perl_warner(aTHX_ packWARN(WARN_GLOB),
4eb79ab5 1660 "glob failed (child exited with status %d%s)",
894356b3 1661 (int)(STATUS_CURRENT >> 8),
cf494569 1662 (STATUS_CURRENT & 0x80) ? ", core dumped" : "");
4eb79ab5 1663 }
a0d0e21e 1664 }
54310121 1665 if (gimme == G_SCALAR) {
ba92458f
AE
1666 if (type != OP_RCATLINE) {
1667 SV_CHECK_THINKFIRST_COW_DROP(TARG);
0c34ef67 1668 SvOK_off(TARG);
ba92458f 1669 }
09e8efcc 1670 SPAGAIN;
a0d0e21e
LW
1671 PUSHTARG;
1672 }
3887d568 1673 MAYBE_TAINT_LINE(io, sv);
a0d0e21e
LW
1674 RETURN;
1675 }
3887d568 1676 MAYBE_TAINT_LINE(io, sv);
a0d0e21e 1677 IoLINES(io)++;
b9fee9ba 1678 IoFLAGS(io) |= IOf_NOLINE;
71be2cbc 1679 SvSETMAGIC(sv);
09e8efcc 1680 SPAGAIN;
a0d0e21e 1681 XPUSHs(sv);
a0d0e21e 1682 if (type == OP_GLOB) {
349d4f2f 1683 const char *t1;
a0d0e21e 1684
3280af22 1685 if (SvCUR(sv) > 0 && SvCUR(PL_rs) > 0) {
6136c704 1686 char * const tmps = SvEND(sv) - 1;
aa07b2f6 1687 if (*tmps == *SvPVX_const(PL_rs)) {
c07a80fd 1688 *tmps = '\0';
b162af07 1689 SvCUR_set(sv, SvCUR(sv) - 1);
c07a80fd
PP
1690 }
1691 }
349d4f2f
NC
1692 for (t1 = SvPVX_const(sv); *t1; t1++)
1693 if (!isALPHA(*t1) && !isDIGIT(*t1) &&
1694 strchr("$&*(){}[]'\";\\|?<>~`", *t1))
a0d0e21e 1695 break;
349d4f2f 1696 if (*t1 && PerlLIO_lstat(SvPVX_const(sv), &PL_statbuf) < 0) {
a0d0e21e
LW
1697 (void)POPs; /* Unmatched wildcard? Chuck it... */
1698 continue;
1699 }
2d79bf7f 1700 } else if (SvUTF8(sv)) { /* OP_READLINE, OP_RCATLINE */
c445ea15 1701 const U8 * const s = (const U8*)SvPVX_const(sv) + offset;
7fc63493
AL
1702 const STRLEN len = SvCUR(sv) - offset;
1703 const U8 *f;
2d79bf7f 1704
ce44635a 1705 if (ckWARN(WARN_UTF8) &&
3a09494c 1706 !is_utf8_string_loc(s, len, &f))
2d79bf7f
JH
1707 /* Emulate :encoding(utf8) warning in the same case. */
1708 Perl_warner(aTHX_ packWARN(WARN_UTF8),
1709 "utf8 \"\\x%02X\" does not map to Unicode",
1710 f < (U8*)SvEND(sv) ? *f : 0);
a0d0e21e 1711 }
54310121 1712 if (gimme == G_ARRAY) {
a0d0e21e 1713 if (SvLEN(sv) - SvCUR(sv) > 20) {
1da4ca5f 1714 SvPV_shrink_to_cur(sv);
a0d0e21e 1715 }
561b68a9 1716 sv = sv_2mortal(newSV(80));
a0d0e21e
LW
1717 continue;
1718 }
54310121 1719 else if (gimme == G_SCALAR && !tmplen && SvLEN(sv) - SvCUR(sv) > 80) {
a0d0e21e 1720 /* try to reclaim a bit of scalar space (only on 1st alloc) */
d5b5861b
NC
1721 const STRLEN new_len
1722 = SvCUR(sv) < 60 ? 80 : SvCUR(sv)+40; /* allow some slop */
1da4ca5f 1723 SvPV_renew(sv, new_len);
a0d0e21e
LW
1724 }
1725 RETURN;
1726 }
1727}
1728
1729PP(pp_enter)
1730{
27da23d5 1731 dVAR; dSP;
c09156bb 1732 register PERL_CONTEXT *cx;
533c011a 1733 I32 gimme = OP_GIMME(PL_op, -1);
a0d0e21e 1734
54310121
PP
1735 if (gimme == -1) {
1736 if (cxstack_ix >= 0)
1737 gimme = cxstack[cxstack_ix].blk_gimme;
1738 else
1739 gimme = G_SCALAR;
1740 }
a0d0e21e
LW
1741
1742 ENTER;
1743
1744 SAVETMPS;
924508f0 1745 PUSHBLOCK(cx, CXt_BLOCK, SP);
a0d0e21e
LW
1746
1747 RETURN;
1748}
1749
1750PP(pp_helem)
1751{
97aff369 1752 dVAR; dSP;
760ac839 1753 HE* he;
ae77835f 1754 SV **svp;
c445ea15
AL
1755 SV * const keysv = POPs;
1756 HV * const hv = (HV*)POPs;
a3b680e6
AL
1757 const U32 lval = PL_op->op_flags & OPf_MOD || LVRET;
1758 const U32 defer = PL_op->op_private & OPpLVAL_DEFER;
be6c24e0 1759 SV *sv;
c158a4fd 1760 const U32 hash = (SvIsCOW_shared_hash(keysv)) ? SvSHARED_HASH(keysv) : 0;
9c5ffd7c 1761 I32 preeminent = 0;
a0d0e21e 1762
ae77835f 1763 if (SvTYPE(hv) == SVt_PVHV) {
8d1f198f
DM
1764 if (PL_op->op_private & OPpLVAL_INTRO) {
1765 MAGIC *mg;
1766 HV *stash;
1767 /* does the element we're localizing already exist? */
c39e6ab0 1768 preeminent =
8d1f198f
DM
1769 /* can we determine whether it exists? */
1770 ( !SvRMAGICAL(hv)
1771 || mg_find((SV*)hv, PERL_MAGIC_env)
1772 || ( (mg = mg_find((SV*)hv, PERL_MAGIC_tied))
1773 /* Try to preserve the existenceness of a tied hash
1774 * element by using EXISTS and DELETE if possible.
1775 * Fallback to FETCH and STORE otherwise */
1776 && (stash = SvSTASH(SvRV(SvTIED_obj((SV*)hv, mg))))
1777 && gv_fetchmethod_autoload(stash, "EXISTS", TRUE)
1778 && gv_fetchmethod_autoload(stash, "DELETE", TRUE)
1779 )
1780 ) ? hv_exists_ent(hv, keysv, 0) : 1;
c39e6ab0 1781
8d1f198f 1782 }
1c846c1f 1783 he = hv_fetch_ent(hv, keysv, lval && !defer, hash);
6136c704 1784 svp = he ? &HeVAL(he) : NULL;
ae77835f 1785 }
c750a3ec 1786 else {
a0d0e21e 1787 RETPUSHUNDEF;
c750a3ec 1788 }
a0d0e21e 1789 if (lval) {
3280af22 1790 if (!svp || *svp == &PL_sv_undef) {
68dc0745
PP
1791 SV* lv;
1792 SV* key2;
2d8e6c8d 1793 if (!defer) {
ce5030a2 1794 DIE(aTHX_ PL_no_helem_sv, keysv);
2d8e6c8d 1795 }
68dc0745
PP
1796 lv = sv_newmortal();
1797 sv_upgrade(lv, SVt_PVLV);
1798 LvTYPE(lv) = 'y';
6136c704 1799 sv_magic(lv, key2 = newSVsv(keysv), PERL_MAGIC_defelem, NULL, 0);
68dc0745
PP
1800 SvREFCNT_dec(key2); /* sv_magic() increments refcount */
1801 LvTARG(lv) = SvREFCNT_inc(hv);
1802 LvTARGLEN(lv) = 1;
1803 PUSHs(lv);
1804 RETURN;
1805 }
533c011a 1806 if (PL_op->op_private & OPpLVAL_INTRO) {
bfcb3514 1807 if (HvNAME_get(hv) && isGV(*svp))
533c011a 1808 save_gp((GV*)*svp, !(PL_op->op_flags & OPf_SPECIAL));
1f5346dc
SC
1809 else {
1810 if (!preeminent) {
1811 STRLEN keylen;
e62f0680 1812 const char * const key = SvPV_const(keysv, keylen);
57813020 1813 SAVEDELETE(hv, savepvn(key,keylen), keylen);
bfc4de9f 1814 } else
1f5346dc
SC
1815 save_helem(hv, keysv, svp);
1816 }
5f05dabc 1817 }
533c011a
NIS
1818 else if (PL_op->op_private & OPpDEREF)
1819 vivify_ref(*svp, PL_op->op_private & OPpDEREF);
a0d0e21e 1820 }
3280af22 1821 sv = (svp ? *svp : &PL_sv_undef);
be6c24e0
GS
1822 /* This makes C<local $tied{foo} = $tied{foo}> possible.
1823 * Pushing the magical RHS on to the stack is useless, since
1824 * that magic is soon destined to be misled by the local(),
1825 * and thus the later pp_sassign() will fail to mg_get() the
1826 * old value. This should also cure problems with delayed
1827 * mg_get()s. GSAR 98-07-03 */
1828 if (!lval && SvGMAGICAL(sv))
1829 sv = sv_mortalcopy(sv);
1830 PUSHs(sv);
a0d0e21e
LW
1831 RETURN;
1832}
1833
1834PP(pp_leave)
1835{
27da23d5 1836 dVAR; dSP;
c09156bb 1837 register PERL_CONTEXT *cx;
a0d0e21e
LW
1838 SV **newsp;
1839 PMOP *newpm;
1840 I32 gimme;
1841
533c011a 1842 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e 1843 cx = &cxstack[cxstack_ix];
3280af22 1844 cx->blk_oldpm = PL_curpm; /* fake block should preserve $1 et al */
a0d0e21e
LW
1845 }
1846
1847 POPBLOCK(cx,newpm);
1848
533c011a 1849 gimme = OP_GIMME(PL_op, -1);
54310121
PP
1850 if (gimme == -1) {
1851 if (cxstack_ix >= 0)
1852 gimme = cxstack[cxstack_ix].blk_gimme;
1853 else
1854 gimme = G_SCALAR;
1855 }
a0d0e21e 1856
a1f49e72 1857 TAINT_NOT;
54310121
PP
1858 if (gimme == G_VOID)
1859 SP = newsp;
1860 else if (gimme == G_SCALAR) {
a3b680e6 1861 register SV **mark;
54310121 1862 MARK = newsp + 1;
09256e2f 1863 if (MARK <= SP) {
54310121
PP
1864 if (SvFLAGS(TOPs) & (SVs_PADTMP|SVs_TEMP))
1865 *MARK = TOPs;
1866 else
1867 *MARK = sv_mortalcopy(TOPs);
09256e2f 1868 } else {
54310121 1869 MEXTEND(mark,0);
3280af22 1870 *MARK = &PL_sv_undef;
a0d0e21e 1871 }
54310121 1872 SP = MARK;
a0d0e21e 1873 }
54310121 1874 else if (gimme == G_ARRAY) {
a1f49e72 1875 /* in case LEAVE wipes old return values */
a3b680e6 1876 register SV **mark;
a1f49e72
CS
1877 for (mark = newsp + 1; mark <= SP; mark++) {
1878 if (!(SvFLAGS(*mark) & (SVs_PADTMP|SVs_TEMP))) {
a0d0e21e 1879 *mark = sv_mortalcopy(*mark);
a1f49e72
CS
1880 TAINT_NOT; /* Each item is independent */
1881 }
1882 }
a0d0e21e 1883 }
3280af22 1884 PL_curpm = newpm; /* Don't pop $1 et al till now */
a0d0e21e
LW
1885
1886 LEAVE;
1887
1888 RETURN;
1889}
1890
1891PP(pp_iter)
1892{
97aff369 1893 dVAR; dSP;
c09156bb 1894 register PERL_CONTEXT *cx;
dc09a129 1895 SV *sv, *oldsv;
4633a7c4 1896 AV* av;
1d7c1841 1897 SV **itersvp;
a0d0e21e 1898
924508f0 1899 EXTEND(SP, 1);
a0d0e21e 1900 cx = &cxstack[cxstack_ix];
6b35e009 1901 if (CxTYPE(cx) != CXt_LOOP)
cea2e8a9 1902 DIE(aTHX_ "panic: pp_iter");
a0d0e21e 1903
1d7c1841 1904 itersvp = CxITERVAR(cx);
4633a7c4 1905 av = cx->blk_loop.iterary;
89ea2908
GA
1906 if (SvTYPE(av) != SVt_PVAV) {
1907 /* iterate ($min .. $max) */
1908 if (cx->blk_loop.iterlval) {
1909 /* string increment */
1910 register SV* cur = cx->blk_loop.iterlval;
4fe3f0fa 1911 STRLEN maxlen = 0;
83003860 1912 const char *max = SvOK((SV*)av) ? SvPV_const((SV*)av, maxlen) : "";
89ea2908 1913 if (!SvNIOK(cur) && SvCUR(cur) <= maxlen) {
1d7c1841 1914 if (SvREFCNT(*itersvp) == 1 && !SvMAGICAL(*itersvp)) {
eaa5c2d6 1915 /* safe to reuse old SV */
1d7c1841 1916 sv_setsv(*itersvp, cur);
eaa5c2d6 1917 }
1c846c1f 1918 else
eaa5c2d6
GA
1919 {
1920 /* we need a fresh SV every time so that loop body sees a
1921 * completely new SV for closures/references to work as
1922 * they used to */
dc09a129 1923 oldsv = *itersvp;
1d7c1841 1924 *itersvp = newSVsv(cur);
dc09a129 1925 SvREFCNT_dec(oldsv);
eaa5c2d6 1926 }
aa07b2f6 1927 if (strEQ(SvPVX_const(cur), max))
89ea2908
GA
1928 sv_setiv(cur, 0); /* terminate next time */
1929 else
1930 sv_inc(cur);
1931 RETPUSHYES;
1932 }
1933 RETPUSHNO;
1934 }
1935 /* integer increment */
1936 if (cx->blk_loop.iterix > cx->blk_loop.itermax)
1937 RETPUSHNO;
7f61b687 1938
3db8f154 1939 /* don't risk potential race */
1d7c1841 1940 if (SvREFCNT(*itersvp) == 1 && !SvMAGICAL(*itersvp)) {
eaa5c2d6 1941 /* safe to reuse old SV */
1d7c1841 1942 sv_setiv(*itersvp, cx->blk_loop.iterix++);
eaa5c2d6 1943 }
1c846c1f 1944 else
eaa5c2d6
GA
1945 {
1946 /* we need a fresh SV every time so that loop body sees a
1947 * completely new SV for closures/references to work as they
1948 * used to */
dc09a129 1949 oldsv = *itersvp;
1d7c1841 1950 *itersvp = newSViv(cx->blk_loop.iterix++);
dc09a129 1951 SvREFCNT_dec(oldsv);
eaa5c2d6 1952 }
89ea2908
GA
1953 RETPUSHYES;
1954 }
1955
1956 /* iterate array */
ef3e5ea9
NC
1957 if (PL_op->op_private & OPpITER_REVERSED) {
1958 /* In reverse, use itermax as the min :-) */
c491ecac 1959 if (cx->blk_loop.iterix <= cx->blk_loop.itermax)
ef3e5ea9 1960 RETPUSHNO;
a0d0e21e 1961
ef3e5ea9 1962 if (SvMAGICAL(av) || AvREIFY(av)) {
c445ea15 1963 SV * const * const svp = av_fetch(av, --cx->blk_loop.iterix, FALSE);
a0714e2c 1964 sv = svp ? *svp : NULL;
ef3e5ea9
NC
1965 }
1966 else {
6e585ca0 1967 sv = AvARRAY(av)[--cx->blk_loop.iterix];
ef3e5ea9 1968 }
d42935ef
JH
1969 }
1970 else {
ef3e5ea9
NC
1971 if (cx->blk_loop.iterix >= (av == PL_curstack ? cx->blk_oldsp :
1972 AvFILL(av)))
1973 RETPUSHNO;
1974
1975 if (SvMAGICAL(av) || AvREIFY(av)) {
c445ea15 1976 SV * const * const svp = av_fetch(av, ++cx->blk_loop.iterix, FALSE);
a0714e2c 1977 sv = svp ? *svp : NULL;
ef3e5ea9
NC
1978 }
1979 else {
1980 sv = AvARRAY(av)[++cx->blk_loop.iterix];
1981 }
d42935ef 1982 }
ef3e5ea9 1983
0565a181 1984 if (sv && SvIS_FREED(sv)) {
a0714e2c 1985 *itersvp = NULL;
b6c83531 1986 Perl_croak(aTHX_ "Use of freed value in iteration");
cccede53
DM
1987 }
1988
d42935ef 1989 if (sv)
a0d0e21e 1990 SvTEMP_off(sv);
a0d0e21e 1991 else
3280af22 1992 sv = &PL_sv_undef;
8b530633 1993 if (av != PL_curstack && sv == &PL_sv_undef) {
5f05dabc 1994 SV *lv = cx->blk_loop.iterlval;
71be2cbc
PP
1995 if (lv && SvREFCNT(lv) > 1) {
1996 SvREFCNT_dec(lv);
a0714e2c 1997 lv = NULL;
71be2cbc 1998 }
5f05dabc
PP
1999 if (lv)
2000 SvREFCNT_dec(LvTARG(lv));
2001 else {
561b68a9 2002 lv = cx->blk_loop.iterlval = newSV(0);
5f05dabc 2003 sv_upgrade(lv, SVt_PVLV);
5f05dabc 2004 LvTYPE(lv) = 'y';
6136c704 2005 sv_magic(lv, NULL, PERL_MAGIC_defelem, NULL, 0);
5f05dabc
PP
2006 }
2007 LvTARG(lv) = SvREFCNT_inc(av);
2008 LvTARGOFF(lv) = cx->blk_loop.iterix;
42718184 2009 LvTARGLEN(lv) = (STRLEN)UV_MAX;
5f05dabc
PP
2010 sv = (SV*)lv;
2011 }
a0d0e21e 2012
dc09a129 2013 oldsv = *itersvp;
1d7c1841 2014 *itersvp = SvREFCNT_inc(sv);
dc09a129
DM
2015 SvREFCNT_dec(oldsv);
2016
a0d0e21e
LW
2017 RETPUSHYES;
2018}
2019
2020PP(pp_subst)
2021{
97aff369 2022 dVAR; dSP; dTARG;
a0d0e21e
LW
2023 register PMOP *pm = cPMOP;
2024 PMOP *rpm = pm;
2025 register SV *dstr;
2026 register char *s;
2027 char *strend;
2028 register char *m;
5c144d81 2029 const char *c;
a0d0e21e
LW
2030 register char *d;
2031 STRLEN clen;
2032 I32 iters = 0;
2033 I32 maxiters;
2034 register I32 i;
2035 bool once;
71be2cbc 2036 bool rxtainted;
a0d0e21e 2037 char *orig;
22e551b9 2038 I32 r_flags;
aaa362c4 2039 register REGEXP *rx = PM_GETRE(pm);
a0d0e21e
LW
2040 STRLEN len;
2041 int force_on_match = 0;
0bcc34c2 2042 const I32 oldsave = PL_savestack_ix;
792b2c16 2043 STRLEN slen;
f272994b 2044 bool doutf8 = FALSE;
f8c7b90f 2045#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
2046 bool is_cow;
2047#endif
a0714e2c 2048 SV *nsv = NULL;
a0d0e21e 2049
5cd24f17 2050 /* known replacement string? */
a0714e2c 2051 dstr = (pm->op_pmflags & PMf_CONST) ? POPs : NULL;
533c011a 2052 if (PL_op->op_flags & OPf_STACKED)
a0d0e21e 2053 TARG = POPs;
59f00321
RGS
2054 else if (PL_op->op_private & OPpTARGET_MY)
2055 GETTARGET;
a0d0e21e 2056 else {
54b9620d 2057 TARG = DEFSV;
a0d0e21e 2058 EXTEND(SP,1);
1c846c1f 2059 }
d9f424b2 2060
f8c7b90f 2061#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
2062 /* Awooga. Awooga. "bool" types that are actually char are dangerous,
2063 because they make integers such as 256 "false". */
2064 is_cow = SvIsCOW(TARG) ? TRUE : FALSE;
2065#else
765f542d
NC
2066 if (SvIsCOW(TARG))
2067 sv_force_normal_flags(TARG,0);
ed252734
NC
2068#endif
2069 if (
f8c7b90f 2070#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
2071 !is_cow &&
2072#endif
2073 (SvREADONLY(TARG)
4ce457a6
TP
2074 || ( (SvTYPE(TARG) == SVt_PVGV || SvTYPE(TARG) > SVt_PVLV)
2075 && !(SvTYPE(TARG) == SVt_PVGV && SvFAKE(TARG)))))
d470f89e 2076 DIE(aTHX_ PL_no_modify);
8ec5e241
NIS
2077 PUTBACK;
2078
d5263905 2079 s = SvPV_mutable(TARG, len);
68dc0745 2080 if (!SvPOKp(TARG) || SvTYPE(TARG) == SVt_PVGV)
a0d0e21e 2081 force_on_match = 1;
b3eb6a9b 2082 rxtainted = ((pm->op_pmdynflags & PMdf_TAINTED) ||
3280af22
NIS
2083 (PL_tainted && (pm->op_pmflags & PMf_RETAINT)));
2084 if (PL_tainted)
b3eb6a9b 2085 rxtainted |= 2;
9212bbba 2086 TAINT_NOT;
a12c0f56 2087
a30b2f1f 2088 RX_MATCH_UTF8_set(rx, DO_UTF8(TARG));
d9f424b2 2089
a0d0e21e
LW
2090 force_it:
2091 if (!pm || !s)
2269b42e 2092 DIE(aTHX_ "panic: pp_subst");
a0d0e21e
LW
2093
2094 strend = s + len;
a30b2f1f 2095 slen = RX_MATCH_UTF8(rx) ? utf8_length((U8*)s, (U8*)strend) : len;
792b2c16
JH
2096 maxiters = 2 * slen + 10; /* We can match twice at each
2097 position, once with zero-length,
2098 second time with non-zero. */
a0d0e21e 2099
3280af22
NIS
2100 if (!rx->prelen && PL_curpm) {
2101 pm = PL_curpm;
aaa362c4 2102 rx = PM_GETRE(pm);
a0d0e21e 2103 }
0b78c20a
JH
2104 r_flags = (rx->nparens || SvTEMP(TARG) || PL_sawampersand
2105 || (pm->op_pmflags & PMf_EVAL))
ed252734 2106 ? REXEC_COPY_STR : 0;
f722798b 2107 if (SvSCREAM(TARG))
22e551b9 2108 r_flags |= REXEC_SCREAM;
7fba1cd6 2109
a0d0e21e 2110 orig = m = s;
f722798b 2111 if (rx->reganch & RE_USE_INTUIT) {
ee0b7718 2112 PL_bostr = orig;
f722798b
IZ
2113 s = CALLREG_INTUIT_START(aTHX_ rx, TARG, s, strend, r_flags, NULL);
2114
2115 if (!s)
2116 goto nope;
2117 /* How to do it in subst? */
2118/* if ( (rx->reganch & ROPT_CHECK_ALL)
1c846c1f 2119 && !PL_sawampersand
f722798b
IZ
2120 && ((rx->reganch & ROPT_NOSCAN)
2121 || !((rx->reganch & RE_INTUIT_TAIL)
2122 && (r_flags & REXEC_SCREAM))))
2123 goto yup;
2124*/
a0d0e21e 2125 }
71be2cbc
PP
2126
2127 /* only replace once? */
a0d0e21e 2128 once = !(rpm->op_pmflags & PMf_GLOBAL);
71be2cbc
PP
2129
2130 /* known replacement string? */
f272994b 2131 if (dstr) {
8514a05a
JH
2132 /* replacement needing upgrading? */
2133 if (DO_UTF8(TARG) && !doutf8) {
db79b45b 2134 nsv = sv_newmortal();
4a176938 2135 SvSetSV(nsv, dstr);
8514a05a
JH
2136 if (PL_encoding)
2137 sv_recode_to_utf8(nsv, PL_encoding);
2138 else
2139 sv_utf8_upgrade(nsv);
5c144d81 2140 c = SvPV_const(nsv, clen);
4a176938
JH
2141 doutf8 = TRUE;
2142 }
2143 else {
5c144d81 2144 c = SvPV_const(dstr, clen);
4a176938 2145 doutf8 = DO_UTF8(dstr);
8514a05a 2146 }
f272994b
A
2147 }
2148 else {
6136c704 2149 c = NULL;
f272994b
A
2150 doutf8 = FALSE;
2151 }
2152
71be2cbc 2153 /* can do inplace substitution? */
ed252734 2154 if (c
f8c7b90f 2155#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
2156 && !is_cow
2157#endif
2158 && (I32)clen <= rx->minlen && (once || !(r_flags & REXEC_COPY_STR))
db79b45b
JH
2159 && !(rx->reganch & ROPT_LOOKBEHIND_SEEN)
2160 && (!doutf8 || SvUTF8(TARG))) {
f722798b
IZ
2161 if (!CALLREGEXEC(aTHX_ rx, s, strend, orig, 0, TARG, NULL,
2162 r_flags | REXEC_CHECKED))
2163 {
8ec5e241 2164 SPAGAIN;
3280af22 2165 PUSHs(&PL_sv_no);
71be2cbc
PP
2166 LEAVE_SCOPE(oldsave);
2167 RETURN;
2168 }
f8c7b90f 2169#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
2170 if (SvIsCOW(TARG)) {
2171 assert (!force_on_match);
2172 goto have_a_cow;
2173 }
2174#endif
71be2cbc
PP
2175 if (force_on_match) {
2176 force_on_match = 0;
2177 s = SvPV_force(TARG, len);
2178 goto force_it;
2179 }
71be2cbc 2180 d = s;
3280af22 2181 PL_curpm = pm;
71be2cbc
PP
2182 SvSCREAM_off(TARG); /* disable possible screamer */
2183 if (once) {
48c036b1 2184 rxtainted |= RX_MATCH_TAINTED(rx);
cf93c79d
IZ
2185 m = orig + rx->startp[0];
2186 d = orig + rx->endp[0];
71be2cbc
PP
2187 s = orig;
2188 if (m - s > strend - d) { /* faster to shorten from end */
2189 if (clen) {
2190 Copy(c, m, clen, char);
2191 m += clen;
a0d0e21e 2192 }
71be2cbc
PP
2193 i = strend - d;
2194 if (i > 0) {
2195 Move(d, m, i, char);
2196 m += i;
a0d0e21e 2197 }
71be2cbc
PP
2198 *m = '\0';
2199 SvCUR_set(TARG, m - s);
2200 }
155aba94 2201 else if ((i = m - s)) { /* faster from front */
71be2cbc
PP
2202 d -= clen;
2203 m = d;
2204 sv_chop(TARG, d-i);
2205 s += i;
2206 while (i--)
2207 *--d = *--s;
2208 if (clen)
2209 Copy(c, m, clen, char);
2210 }
2211 else if (clen) {
2212 d -= clen;
2213 sv_chop(TARG, d);
2214 Copy(c, d, clen, char);
2215 }
2216 else {
2217 sv_chop(TARG, d);
2218 }
48c036b1 2219 TAINT_IF(rxtainted & 1);
8ec5e241 2220 SPAGAIN;
3280af22 2221 PUSHs(&PL_sv_yes);
71be2cbc
PP
2222 }
2223 else {
71be2cbc
PP
2224 do {
2225 if (iters++ > maxiters)
cea2e8a9 2226 DIE(aTHX_ "Substitution loop");
d9f97599 2227 rxtainted |= RX_MATCH_TAINTED(rx);
cf93c79d 2228 m = rx->startp[0] + orig;
155aba94 2229 if ((i = m - s)) {
71be2cbc
PP
2230 if (s != d)
2231 Move(s, d, i, char);
2232 d += i;
a0d0e21e 2233 }
71be2cbc
PP
2234 if (clen) {
2235 Copy(c, d, clen, char);
2236 d += clen;
2237 }
cf93c79d 2238 s = rx->endp[0] + orig;
cea2e8a9 2239 } while (CALLREGEXEC(aTHX_ rx, s, strend, orig, s == m,
f722798b
IZ
2240 TARG, NULL,
2241 /* don't match same null twice */
2242 REXEC_NOT_FIRST|REXEC_IGNOREPOS));
71be2cbc
PP
2243 if (s != d) {
2244 i = strend - s;
aa07b2f6 2245 SvCUR_set(TARG, d - SvPVX_const(TARG) + i);
71be2cbc 2246 Move(s, d, i+1, char); /* include the NUL */
a0d0e21e 2247 }
48c036b1 2248 TAINT_IF(rxtainted & 1);
8ec5e241 2249 SPAGAIN;
71be2cbc 2250 PUSHs(sv_2mortal(newSViv((I32)iters)));
a0d0e21e 2251 }
80b498e0 2252 (void)SvPOK_only_UTF8(TARG);
48c036b1 2253 TAINT_IF(rxtainted);
8ec5e241
NIS
2254 if (SvSMAGICAL(TARG)) {
2255 PUTBACK;
2256 mg_set(TARG);
2257 SPAGAIN;
2258 }
9212bbba 2259 SvTAINT(TARG);
aefe6dfc
JH
2260 if (doutf8)
2261 SvUTF8_on(TARG);
71be2cbc
PP
2262 LEAVE_SCOPE(oldsave);
2263 RETURN;
a0d0e21e 2264 }
71be2cbc 2265
f722798b
IZ
2266 if (CALLREGEXEC(aTHX_ rx, s, strend, orig, 0, TARG, NULL,
2267 r_flags | REXEC_CHECKED))
2268 {
a0d0e21e
LW
2269 if (force_on_match) {
2270 force_on_match = 0;
2271 s = SvPV_force(TARG, len);
2272 goto force_it;
2273 }
f8c7b90f 2274#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
2275 have_a_cow:
2276#endif
48c036b1 2277 rxtainted |= RX_MATCH_TAINTED(rx);
f2b990bf 2278 dstr = newSVpvn(m, s-m);
ffc61ed2
JH
2279 if (DO_UTF8(TARG))
2280 SvUTF8_on(dstr);
3280af22 2281 PL_curpm = pm;
a0d0e21e 2282 if (!c) {
c09156bb 2283 register PERL_CONTEXT *cx;
8ec5e241 2284 SPAGAIN;
454f1e26 2285 (void)ReREFCNT_inc(rx);
a0d0e21e
LW
2286 PUSHSUBST(cx);
2287 RETURNOP(cPMOP->op_pmreplroot);
2288 }
cf93c79d 2289 r_flags |= REXEC_IGNOREPOS | REXEC_NOT_FIRST;
a0d0e21e
LW
2290 do {
2291 if (iters++ > maxiters)
cea2e8a9 2292 DIE(aTHX_ "Substitution loop");
d9f97599 2293 rxtainted |= RX_MATCH_TAINTED(rx);
cf93c79d 2294 if (RX_MATCH_COPIED(rx) && rx->subbeg != orig) {
a0d0e21e
LW
2295 m = s;
2296 s = orig;
cf93c79d 2297 orig = rx->subbeg;
a0d0e21e
LW
2298 s = orig + (m - s);
2299 strend = s + (strend - m);
2300 }
cf93c79d 2301 m = rx->startp[0] + orig;
db79b45b
JH
2302 if (doutf8 && !SvUTF8(dstr))
2303 sv_catpvn_utf8_upgrade(dstr, s, m - s, nsv);
2304 else
2305 sv_catpvn(dstr, s, m-s);
cf93c79d 2306 s = rx->endp[0] + orig;
a0d0e21e
LW
2307 if (clen)
2308 sv_catpvn(dstr, c, clen);
2309 if (once)
2310 break;
ffc61ed2
JH
2311 } while (CALLREGEXEC(aTHX_ rx, s, strend, orig, s == m,
2312 TARG, NULL, r_flags));
db79b45b
JH
2313 if (doutf8 && !DO_UTF8(TARG))
2314 sv_catpvn_utf8_upgrade(dstr, s, strend - s, nsv);
89afcb60
A
2315 else
2316 sv_catpvn(dstr, s, strend - s);
748a9306 2317
f8c7b90f 2318#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
2319 /* The match may make the string COW. If so, brilliant, because that's
2320 just saved us one malloc, copy and free - the regexp has donated
2321 the old buffer, and we malloc an entirely new one, rather than the
2322 regexp malloc()ing a buffer and copying our original, only for
2323 us to throw it away here during the substitution. */
2324 if (SvIsCOW(TARG)) {
2325 sv_force_normal_flags(TARG, SV_COW_DROP_PV);
2326 } else
2327#endif
2328 {
8bd4d4c5 2329 SvPV_free(TARG);
ed252734 2330 }
f880fe2f 2331 SvPV_set(TARG, SvPVX(dstr));
748a9306
LW
2332 SvCUR_set(TARG, SvCUR(dstr));
2333 SvLEN_set(TARG, SvLEN(dstr));
f272994b 2334 doutf8 |= DO_UTF8(dstr);
6136c704 2335 SvPV_set(dstr, NULL);
748a9306
LW
2336 sv_free(dstr);
2337
48c036b1 2338 TAINT_IF(rxtainted & 1);
f878fbec 2339 SPAGAIN;
48c036b1
GS
2340 PUSHs(sv_2mortal(newSViv((I32)iters)));
2341
a0d0e21e 2342 (void)SvPOK_only(TARG);
f272994b 2343 if (doutf8)
60aeb6fd 2344 SvUTF8_on(TARG);
48c036b1 2345 TAINT_IF(rxtainted);
a0d0e21e 2346 SvSETMAGIC(TARG);
9212bbba 2347 SvTAINT(TARG);
4633a7c4 2348 LEAVE_SCOPE(oldsave);
a0d0e21e
LW
2349 RETURN;
2350 }
5cd24f17 2351 goto ret_no;
a0d0e21e
LW
2352
2353nope:
1c846c1f 2354ret_no:
8ec5e241 2355 SPAGAIN;
3280af22 2356 PUSHs(&PL_sv_no);
4633a7c4 2357 LEAVE_SCOPE(oldsave);
a0d0e21e
LW
2358 RETURN;
2359}
2360
2361PP(pp_grepwhile)
2362{
27da23d5 2363 dVAR; dSP;
a0d0e21e
LW
2364
2365 if (SvTRUEx(POPs))
3280af22
NIS
2366 PL_stack_base[PL_markstack_ptr[-1]++] = PL_stack_base[*PL_markstack_ptr];
2367 ++*PL_markstack_ptr;
a0d0e21e
LW
2368 LEAVE; /* exit inner scope */
2369
2370 /* All done yet? */
3280af22 2371 if (PL_stack_base + *PL_markstack_ptr > SP) {
a0d0e21e 2372 I32 items;
c4420975 2373 const I32 gimme = GIMME_V;
a0d0e21e
LW
2374
2375 LEAVE; /* exit outer scope */
2376 (void)POPMARK; /* pop src */
3280af22 2377 items = --*PL_markstack_ptr - PL_markstack_ptr[-1];
a0d0e21e 2378 (void)POPMARK; /* pop dst */
3280af22 2379 SP = PL_stack_base + POPMARK; /* pop original mark */
54310121 2380 if (gimme == G_SCALAR) {
7cc47870 2381 if (PL_op->op_private & OPpGREP_LEX) {
c4420975 2382 SV* const sv = sv_newmortal();
7cc47870
RGS
2383 sv_setiv(sv, items);
2384 PUSHs(sv);
2385 }
2386 else {
2387 dTARGET;
2388 XPUSHi(items);
2389 }
a0d0e21e 2390 }
54310121
PP
2391 else if (gimme == G_ARRAY)
2392 SP += items;
a0d0e21e
LW
2393 RETURN;
2394 }
2395 else {
2396 SV *src;
2397
2398 ENTER; /* enter inner scope */
1d7c1841 2399 SAVEVPTR(PL_curpm);
a0d0e21e 2400
3280af22 2401 src = PL_stack_base[*PL_markstack_ptr];
a0d0e21e 2402 SvTEMP_off(src);
59f00321
RGS
2403 if (PL_op->op_private & OPpGREP_LEX)
2404 PAD_SVl(PL_op->op_targ) = src;
2405 else
2406 DEFSV = src;
a0d0e21e
LW
2407
2408 RETURNOP(cLOGOP->op_other);
2409 }
2410}
2411
2412PP(pp_leavesub)
2413{
27da23d5 2414 dVAR; dSP;
a0d0e21e
LW
2415 SV **mark;
2416 SV **newsp;
2417 PMOP *newpm;
2418 I32 gimme;
c09156bb 2419 register PERL_CONTEXT *cx;
b0d9ce38 2420 SV *sv;
a0d0e21e 2421
9850bf21
RH
2422 if (CxMULTICALL(&cxstack[cxstack_ix]))
2423 return 0;
2424
a0d0e21e 2425 POPBLOCK(cx,newpm);
5dd42e15 2426 cxstack_ix++; /* temporarily protect top context */
1c846c1f 2427
a1f49e72 2428 TAINT_NOT;
a0d0e21e
LW
2429 if (gimme == G_SCALAR) {
2430 MARK = newsp + 1;
a29cdaf0 2431 if (MARK <= SP) {
a8bba7fa 2432 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
a29cdaf0
IZ
2433 if (SvTEMP(TOPs)) {
2434 *MARK = SvREFCNT_inc(TOPs);
2435 FREETMPS;
2436 sv_2mortal(*MARK);
cd06dffe
GS
2437 }
2438 else {
959e3673 2439 sv = SvREFCNT_inc(TOPs); /* FREETMPS could clobber it */
a29cdaf0 2440 FREETMPS;
959e3673
GS
2441 *MARK = sv_mortalcopy(sv);
2442 SvREFCNT_dec(sv);
a29cdaf0 2443 }
cd06dffe
GS
2444 }
2445 else
a29cdaf0 2446 *MARK = SvTEMP(TOPs) ? TOPs : sv_mortalcopy(TOPs);
cd06dffe
GS
2447 }
2448 else {
f86702cc 2449 MEXTEND(MARK, 0);
3280af22 2450 *MARK = &PL_sv_undef;
a0d0e21e
LW
2451 }
2452 SP = MARK;
2453 }
54310121 2454 else if (gimme == G_ARRAY) {
f86702cc 2455 for (MARK = newsp + 1; MARK <= SP; MARK++) {
a1f49e72 2456 if (!SvTEMP(*MARK)) {
f86702cc 2457 *MARK = sv_mortalcopy(*MARK);
a1f49e72
CS
2458 TAINT_NOT; /* Each item is independent */
2459 }
f86702cc 2460 }
a0d0e21e 2461 }
f86702cc 2462 PUTBACK;
1c846c1f 2463
5dd42e15
DM
2464 LEAVE;
2465 cxstack_ix--;
b0d9ce38 2466 POPSUB(cx,sv); /* Stack values are safe: release CV and @_ ... */
3280af22 2467 PL_curpm = newpm; /* ... and pop $1 et al */
a0d0e21e 2468
b0d9ce38 2469 LEAVESUB(sv);
f39bc417 2470 return cx->blk_sub.retop;
a0d0e21e
LW
2471}
2472
cd06dffe
GS
2473/* This duplicates the above code because the above code must not
2474 * get any slower by more conditions */
2475PP(pp_leavesublv)
2476{
27da23d5 2477 dVAR; dSP;
cd06dffe
GS
2478 SV **mark;
2479 SV **newsp;
2480 PMOP *newpm;
2481 I32 gimme;
2482 register PERL_CONTEXT *cx;
b0d9ce38 2483 SV *sv;
cd06dffe 2484
9850bf21
RH
2485 if (CxMULTICALL(&cxstack[cxstack_ix]))
2486 return 0;
2487
cd06dffe 2488 POPBLOCK(cx,newpm);
5dd42e15 2489 cxstack_ix++; /* temporarily protect top context */
1c846c1f 2490
cd06dffe
GS
2491 TAINT_NOT;
2492
2493 if (cx->blk_sub.lval & OPpENTERSUB_INARGS) {
2494 /* We are an argument to a function or grep().
2495 * This kind of lvalueness was legal before lvalue
2496 * subroutines too, so be backward compatible:
2497 * cannot report errors. */
2498
2499 /* Scalar context *is* possible, on the LHS of -> only,
2500 * as in f()->meth(). But this is not an lvalue. */
2501 if (gimme == G_SCALAR)
2502 goto temporise;
2503 if (gimme == G_ARRAY) {
a8bba7fa 2504 if (!CvLVALUE(cx->blk_sub.cv))
cd06dffe
GS
2505 goto temporise_array;
2506 EXTEND_MORTAL(SP - newsp);
2507 for (mark = newsp + 1; mark <= SP; mark++) {
2508 if (SvTEMP(*mark))
bb263b4e 2509 /*EMPTY*/;
cd06dffe
GS
2510 else if (SvFLAGS(*mark) & (SVs_PADTMP | SVf_READONLY))
2511 *mark = sv_mortalcopy(*mark);
2512 else {
2513 /* Can be a localized value subject to deletion. */
2514 PL_tmps_stack[++PL_tmps_ix] = *mark;
e1f15930 2515 (void)SvREFCNT_inc(*mark);
cd06dffe
GS
2516 }
2517 }
2518 }
2519 }
2520 else if (cx->blk_sub.lval) { /* Leave it as it is if we can. */
2521 /* Here we go for robustness, not for speed, so we change all
2522 * the refcounts so the caller gets a live guy. Cannot set
2523 * TEMP, so sv_2mortal is out of question. */
a8bba7fa 2524 if (!CvLVALUE(cx->blk_sub.cv)) {
5dd42e15
DM
2525 LEAVE;
2526 cxstack_ix--;
b0d9ce38 2527 POPSUB(cx,sv);
d470f89e 2528 PL_curpm = newpm;
b0d9ce38 2529 LEAVESUB(sv);
d470f89e
GS
2530 DIE(aTHX_ "Can't modify non-lvalue subroutine call");
2531 }
cd06dffe
GS
2532 if (gimme == G_SCALAR) {
2533 MARK = newsp + 1;
2534 EXTEND_MORTAL(1);
2535 if (MARK == SP) {
f9bc45ef
TP
2536 /* Temporaries are bad unless they happen to be elements
2537 * of a tied hash or array */
2538 if (SvFLAGS(TOPs) & (SVs_TEMP | SVs_PADTMP | SVf_READONLY) &&
2539 !(SvRMAGICAL(TOPs) && mg_find(TOPs, PERL_MAGIC_tiedelem))) {
5dd42e15
DM
2540 LEAVE;
2541 cxstack_ix--;
b0d9ce38 2542 POPSUB(cx,sv);
d470f89e 2543 PL_curpm = newpm;
b0d9ce38 2544 LEAVESUB(sv);
e9f19e3c
HS
2545 DIE(aTHX_ "Can't return %s from lvalue subroutine",
2546 SvREADONLY(TOPs) ? (TOPs == &PL_sv_undef) ? "undef"
2547 : "a readonly value" : "a temporary");
d470f89e 2548 }
cd06dffe
GS
2549 else { /* Can be a localized value
2550 * subject to deletion. */
2551 PL_tmps_stack[++PL_tmps_ix] = *mark;
e1f15930 2552 (void)SvREFCNT_inc(*mark);
cd06dffe
GS
2553 }
2554 }
d470f89e 2555 else { /* Should not happen? */
5dd42e15
DM
2556 LEAVE;
2557 cxstack_ix--;
b0d9ce38 2558 POPSUB(cx,sv);
d470f89e 2559 PL_curpm = newpm;
b0d9ce38 2560 LEAVESUB(sv);
d470f89e 2561 DIE(aTHX_ "%s returned from lvalue subroutine in scalar context",
cd06dffe 2562 (MARK > SP ? "Empty array" : "Array"));
d470f89e 2563 }
cd06dffe
GS
2564 SP = MARK;
2565 }
2566 else if (gimme == G_ARRAY) {
2567 EXTEND_MORTAL(SP - newsp);
2568 for (mark = newsp + 1; mark <= SP; mark++) {
f206cdda
AMS
2569 if (*mark != &PL_sv_undef
2570 && SvFLAGS(*mark) & (SVs_TEMP | SVs_PADTMP | SVf_READONLY)) {
d470f89e
GS
2571 /* Might be flattened array after $#array = */
2572 PUTBACK;
5dd42e15
DM
2573 LEAVE;
2574 cxstack_ix--;
b0d9ce38 2575 POPSUB(cx,sv);
d470f89e 2576 PL_curpm = newpm;
b0d9ce38 2577 LEAVESUB(sv);
f206cdda
AMS
2578 DIE(aTHX_ "Can't return a %s from lvalue subroutine",
2579 SvREADONLY(TOPs) ? "readonly value" : "temporary");
d470f89e 2580 }
cd06dffe 2581 else {
cd06dffe
GS
2582 /* Can be a localized value subject to deletion. */
2583 PL_tmps_stack[++PL_tmps_ix] = *mark;
e1f15930 2584 (void)SvREFCNT_inc(*mark);
cd06dffe
GS
2585 }
2586 }
2587 }
2588 }
2589 else {
2590 if (gimme == G_SCALAR) {
2591 temporise:
2592 MARK = newsp + 1;
2593 if (MARK <= SP) {
a8bba7fa 2594 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
cd06dffe
GS
2595 if (SvTEMP(TOPs)) {
2596 *MARK = SvREFCNT_inc(TOPs);
2597 FREETMPS;
2598 sv_2mortal(*MARK);
2599 }
2600 else {
959e3673 2601 sv = SvREFCNT_inc(TOPs); /* FREETMPS could clobber it */
cd06dffe 2602 FREETMPS;
959e3673
GS
2603 *MARK = sv_mortalcopy(sv);
2604 SvREFCNT_dec(sv);
cd06dffe
GS
2605 }
2606 }
2607 else
2608 *MARK = SvTEMP(TOPs) ? TOPs : sv_mortalcopy(TOPs);
2609 }
2610 else {
2611 MEXTEND(MARK, 0);
2612 *MARK = &PL_sv_undef;
2613 }
2614 SP = MARK;
2615 }
2616 else if (gimme == G_ARRAY) {
2617 temporise_array:
2618 for (MARK = newsp + 1; MARK <= SP; MARK++) {
2619 if (!SvTEMP(*MARK)) {
2620 *MARK = sv_mortalcopy(*MARK);
2621 TAINT_NOT; /* Each item is independent */
2622 }
2623 }
2624 }
2625 }
2626 PUTBACK;
1c846c1f 2627
5dd42e15
DM
2628 LEAVE;
2629 cxstack_ix--;
b0d9ce38 2630 POPSUB(cx,sv); /* Stack values are safe: release CV and @_ ... */
cd06dffe
GS
2631 PL_curpm = newpm; /* ... and pop $1 et al */
2632
b0d9ce38 2633 LEAVESUB(sv);
f39bc417 2634 return cx->blk_sub.retop;
cd06dffe
GS
2635}
2636
2637
76e3520e 2638STATIC CV *
cea2e8a9 2639S_get_db_sub(pTHX_ SV **svp, CV *cv)
3de9ffa1 2640{
97aff369 2641 dVAR;
0bcc34c2 2642 SV * const dbsv = GvSVn(PL_DBsub);
491527d0 2643
f398eb67 2644 save_item(dbsv);
491527d0
GS
2645 if (!PERLDB_SUB_NN) {
2646 GV *gv = CvGV(cv);
2647
491527d0 2648 if ( (CvFLAGS(cv) & (CVf_ANON | CVf_CLONED))
1c846c1f 2649 || strEQ(GvNAME(gv), "END")
491527d0
GS
2650 || ((GvCV(gv) != cv) && /* Could be imported, and old sub redefined. */
2651 !( (SvTYPE(*svp) == SVt_PVGV) && (GvCV((GV*)*svp) == cv)
2652 && (gv = (GV*)*svp) ))) {
2653 /* Use GV from the stack as a fallback. */
2654 /* GV is potentially non-unique, or contain different CV. */
823a54a3 2655 SV * const tmp = newRV((SV*)cv);
c2e66d9e
GS
2656 sv_setsv(dbsv, tmp);
2657 SvREFCNT_dec(tmp);
491527d0
GS
2658 }
2659 else {
6136c704 2660 gv_efullname3(dbsv, gv, NULL);
491527d0 2661 }
3de9ffa1
MB
2662 }
2663 else {
a9c4fd4e 2664 const int type = SvTYPE(dbsv);
f398eb67
NC
2665 if (type < SVt_PVIV && type != SVt_IV)
2666 sv_upgrade(dbsv, SVt_PVIV);
155aba94 2667 (void)SvIOK_on(dbsv);
45977657 2668 SvIV_set(dbsv, PTR2IV(cv)); /* Do it the quickest way */
3de9ffa1 2669 }
491527d0 2670
aed2304a 2671 if (CvISXSUB(cv))
3280af22
NIS
2672 PL_curcopdb = PL_curcop;
2673 cv = GvCV(PL_DBsub);
3de9ffa1
MB
2674 return cv;
2675}
2676
a0d0e21e
LW
2677PP(pp_entersub)
2678{
27da23d5 2679 dVAR; dSP; dPOPss;
a0d0e21e 2680 GV *gv;
a0d0e21e 2681 register CV *cv;
c09156bb 2682 register PERL_CONTEXT *cx;
5d94fbed 2683 I32 gimme;
a9c4fd4e 2684 const bool hasargs = (PL_op->op_flags & OPf_STACKED) != 0;
a0d0e21e
LW
2685
2686 if (!sv)
cea2e8a9 2687 DIE(aTHX_ "Not a CODE reference");
a0d0e21e 2688 switch (SvTYPE(sv)) {
f1025168
NC
2689 /* This is overwhelming the most common case: */
2690 case SVt_PVGV:
f730a42d
NC
2691 if (!(cv = GvCVu((GV*)sv))) {
2692 HV *stash;
f2c0649b 2693 cv = sv_2cv(sv, &stash, &gv, 0);
f730a42d 2694 }
f1025168
NC
2695 if (!cv) {
2696 ENTER;
2697 SAVETMPS;
2698 goto try_autoload;
2699 }
2700 break;
a0d0e21e
LW
2701 default:
2702 if (!SvROK(sv)) {
a9c4fd4e 2703 const char *sym;
3280af22 2704 if (sv == &PL_sv_yes) { /* unfound import, ignore */
fb73857a 2705 if (hasargs)
3280af22 2706 SP = PL_stack_base + POPMARK;
a0d0e21e 2707 RETURN;
fb73857a 2708 }
15ff848f
CS
2709 if (SvGMAGICAL(sv)) {
2710 mg_get(sv);
f5f1d18e
AMS
2711 if (SvROK(sv))
2712 goto got_rv;
6136c704 2713 sym = SvPOKp(sv) ? SvPVX_const(sv) : NULL;
15ff848f 2714 }
a9c4fd4e 2715 else {
8b6b16e7 2716 sym = SvPV_nolen_const(sv);
a9c4fd4e 2717 }
15ff848f 2718 if (!sym)
cea2e8a9 2719 DIE(aTHX_ PL_no_usym, "a subroutine");
533c011a 2720 if (PL_op->op_private & HINT_STRICT_REFS)
cea2e8a9 2721 DIE(aTHX_ PL_no_symref, sym, "a subroutine");
864dbfa3 2722 cv = get_cv(sym, TRUE);
a0d0e21e
LW
2723 break;
2724 }
f5f1d18e 2725 got_rv:
f5284f61 2726 {
823a54a3 2727 SV * const * sp = &sv; /* Used in tryAMAGICunDEREF macro. */
f5284f61
IZ
2728 tryAMAGICunDEREF(to_cv);
2729 }
a0d0e21e
LW
2730 cv = (CV*)SvRV(sv);
2731 if (SvTYPE(cv) == SVt_PVCV)
2732 break;
2733 /* FALL THROUGH */
2734 case SVt_PVHV:
2735 case SVt_PVAV:
cea2e8a9 2736 DIE(aTHX_ "Not a CODE reference");
f1025168 2737 /* This is the second most common case: */
a0d0e21e
LW
2738 case SVt_PVCV:
2739 cv = (CV*)sv;
2740 break;
a0d0e21e
LW
2741 }
2742
2743 ENTER;
2744 SAVETMPS;
2745
2746 retry:
a0d0e21e 2747 if (!CvROOT(cv) && !CvXSUB(cv)) {
2f349aa0
NC
2748 GV* autogv;
2749 SV* sub_name;
2750
2751 /* anonymous or undef'd function leaves us no recourse */
2752 if (CvANON(cv) || !(gv = CvGV(cv)))
2753 DIE(aTHX_ "Undefined subroutine called");
2754
2755 /* autoloaded stub? */
2756 if (cv != GvCV(gv)) {
2757 cv = GvCV(gv);
2758 }
2759 /* should call AUTOLOAD now? */
2760 else {
2761try_autoload:
2762 if ((autogv = gv_autoload4(GvSTASH(gv), GvNAME(gv), GvNAMELEN(gv),
2763 FALSE)))
2764 {
2765 cv = GvCV(autogv);
2766 }
2767 /* sorry */
2768 else {
2769 sub_name = sv_newmortal();
6136c704 2770 gv_efullname3(sub_name, gv, NULL);
2f349aa0
NC
2771 DIE(aTHX_ "Undefined subroutine &%"SVf" called", sub_name);
2772 }
2773 }
2774 if (!cv)
2775 DIE(aTHX_ "Not a CODE reference");
2776 goto retry;
a0d0e21e
LW
2777 }
2778
54310121 2779 gimme = GIMME_V;
67caa1fe 2780 if ((PL_op->op_private & OPpENTERSUB_DB) && GvCV(PL_DBsub) && !CvNODEBUG(cv)) {
06492da6
SF
2781 if (CvASSERTION(cv) && PL_DBassertion)
2782 sv_setiv(PL_DBassertion, 1);
2783
4f01c5a5 2784 cv = get_db_sub(&sv, cv);
ccafdc96
RGS
2785 if (!cv || (!CvXSUB(cv) && !CvSTART(cv)))
2786 DIE(aTHX_ "No DB::sub routine defined");
67caa1fe 2787 }
a0d0e21e 2788
aed2304a 2789 if (!(CvISXSUB(cv))) {
f1025168 2790 /* This path taken at least 75% of the time */
a0d0e21e
LW
2791 dMARK;
2792 register I32 items = SP - MARK;
0bcc34c2 2793 AV* const padlist = CvPADLIST(cv);
a0d0e21e
LW
2794 PUSHBLOCK(cx, CXt_SUB, MARK);
2795 PUSHSUB(cx);
f39bc417 2796 cx->blk_sub.retop = PL_op->op_next;
a0d0e21e 2797 CvDEPTH(cv)++;
6b35e009
GS
2798 /* XXX This would be a natural place to set C<PL_compcv = cv> so
2799 * that eval'' ops within this sub know the correct lexical space.
a3985cdc
DM
2800 * Owing the speed considerations, we choose instead to search for
2801 * the cv using find_runcv() when calling doeval().
6b35e009 2802 */
b36bdeca 2803 if (CvDEPTH(cv) >= 2) {
1d7c1841 2804 PERL_STACK_OVERFLOW_CHECK();
26019298 2805 pad_push(padlist, CvDEPTH(cv));
a0d0e21e 2806 }
9320a037
DM
2807 SAVECOMPPAD();
2808 PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv));
6d4ff0d2 2809 if (hasargs)
6d4ff0d2 2810 {
0bcc34c2 2811 AV* const av = (AV*)PAD_SVl(0);
221373f0
GS
2812 if (AvREAL(av)) {
2813 /* @_ is normally not REAL--this should only ever
2814 * happen when DB::sub() calls things that modify @_ */
2815 av_clear(av);
2816 AvREAL_off(av);
2817 AvREIFY_on(av);
2818 }
3280af22
NIS
2819 cx->blk_sub.savearray = GvAV(PL_defgv);
2820 GvAV(PL_defgv) = (AV*)SvREFCNT_inc(av);
dd2155a4 2821 CX_CURPAD_SAVE(cx->blk_sub);
6d4ff0d2 2822 cx->blk_sub.argarray = av;
a0d0e21e
LW
2823 ++MARK;
2824
2825 if (items > AvMAX(av) + 1) {
504618e9 2826 SV **ary = AvALLOC(av);
a0d0e21e
LW
2827 if (AvARRAY(av) != ary) {
2828 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
f880fe2f 2829 SvPV_set(av, (char*)ary);
a0d0e21e
LW
2830 }
2831 if (items > AvMAX(av) + 1) {
2832 AvMAX(av) = items - 1;
2833 Renew(ary,items,SV*);
2834 AvALLOC(av) = ary;
f880fe2f 2835 SvPV_set(av, (char*)ary);
a0d0e21e
LW
2836 }
2837 }
2838 Copy(MARK,AvARRAY(av),items,SV*);
93965878 2839 AvFILLp(av) = items - 1;
1c846c1f 2840
a0d0e21e
LW
2841 while (items--) {
2842 if (*MARK)
2843 SvTEMP_off(*MARK);
2844 MARK++;
2845 }
2846 }
4a925ff6
GS
2847 /* warning must come *after* we fully set up the context
2848 * stuff so that __WARN__ handlers can safely dounwind()
2849 * if they want to
2850 */
2851 if (CvDEPTH(cv) == 100 && ckWARN(WARN_RECURSION)
2852 && !(PERLDB_SUB && cv == GvCV(PL_DBsub)))
2853 sub_crush_depth(cv);
77a005ab 2854#if 0
bf49b057 2855 DEBUG_S(PerlIO_printf(Perl_debug_log,
0f15f207 2856 "%p entersub returning %p\n", thr, CvSTART(cv)));
77a005ab 2857#endif
a0d0e21e
LW
2858 RETURNOP(CvSTART(cv));
2859 }
f1025168 2860 else {
f1025168
NC
2861 I32 markix = TOPMARK;
2862
2863 PUTBACK;
2864
2865 if (!hasargs) {
2866 /* Need to copy @_ to stack. Alternative may be to
2867 * switch stack to @_, and copy return values
2868 * back. This would allow popping @_ in XSUB, e.g.. XXXX */
a3b680e6
AL
2869 AV * const av = GvAV(PL_defgv);
2870 const I32 items = AvFILLp(av) + 1; /* @_ is not tieable */
f1025168
NC
2871
2872 if (items) {
2873 /* Mark is at the end of the stack. */
2874 EXTEND(SP, items);
2875 Copy(AvARRAY(av), SP + 1, items, SV*);
2876 SP += items;
2877 PUTBACK ;
2878 }
2879 }
2880 /* We assume first XSUB in &DB::sub is the called one. */
2881 if (PL_curcopdb) {
2882 SAVEVPTR(PL_curcop);
2883 PL_curcop = PL_curcopdb;
2884 PL_curcopdb = NULL;
2885 }
2886 /* Do we need to open block here? XXXX */
2887 (void)(*CvXSUB(cv))(aTHX_ cv);
2888
2889 /* Enforce some sanity in scalar context. */
2890 if (gimme == G_SCALAR && ++markix != PL_stack_sp - PL_stack_base ) {
2891 if (markix > PL_stack_sp - PL_stack_base)
2892 *(PL_stack_base + markix) = &PL_sv_undef;
2893 else
2894 *(PL_stack_base + markix) = *PL_stack_sp;
2895 PL_stack_sp = PL_stack_base + markix;
2896 }
f1025168
NC
2897 LEAVE;
2898 return NORMAL;
2899 }
a0d0e21e
LW
2900}
2901
44a8e56a 2902void
864dbfa3 2903Perl_sub_crush_depth(pTHX_ CV *cv)
44a8e56a
PP
2904{
2905 if (CvANON(cv))
9014280d 2906 Perl_warner(aTHX_ packWARN(WARN_RECURSION), "Deep recursion on anonymous subroutine");
44a8e56a 2907 else {
aec46f14 2908 SV* const tmpstr = sv_newmortal();
6136c704 2909 gv_efullname3(tmpstr, CvGV(cv), NULL);
35c1215d
NC
2910 Perl_warner(aTHX_ packWARN(WARN_RECURSION), "Deep recursion on subroutine \"%"SVf"\"",
2911 tmpstr);
44a8e56a
PP
2912 }
2913}
2914
a0d0e21e
LW
2915PP(pp_aelem)
2916{
97aff369 2917 dVAR; dSP;
a0d0e21e 2918 SV** svp;
a3b680e6 2919 SV* const elemsv = POPs;
d804643f 2920 IV elem = SvIV(elemsv);
0bcc34c2 2921 AV* const av = (AV*)POPs;
e1ec3a88
AL
2922 const U32 lval = PL_op->op_flags & OPf_MOD || LVRET;
2923 const U32 defer = (PL_op->op_private & OPpLVAL_DEFER) && (elem > av_len(av));
be6c24e0 2924 SV *sv;
a0d0e21e 2925
e35c1634 2926 if (SvROK(elemsv) && !SvGAMAGIC(elemsv) && ckWARN(WARN_MISC))
35c1215d 2927 Perl_warner(aTHX_ packWARN(WARN_MISC), "Use of reference \"%"SVf"\" as array index", elemsv);
748a9306 2928 if (elem > 0)
3280af22 2929 elem -= PL_curcop->cop_arybase;
a0d0e21e
LW
2930 if (SvTYPE(av) != SVt_PVAV)
2931 RETPUSHUNDEF;
68dc0745 2932 svp = av_fetch(av, elem, lval && !defer);
a0d0e21e 2933 if (lval) {
2b573ace 2934#ifdef PERL_MALLOC_WRAP
2b573ace 2935 if (SvUOK(elemsv)) {
a9c4fd4e 2936 const UV uv = SvUV(elemsv);
2b573ace
JH
2937 elem = uv > IV_MAX ? IV_MAX : uv;
2938 }
2939 else if (SvNOK(elemsv))
2940 elem = (IV)SvNV(elemsv);
a3b680e6
AL
2941 if (elem > 0) {
2942 static const char oom_array_extend[] =
2943 "Out of memory during array extend"; /* Duplicated in av.c */
2b573ace 2944 MEM_WRAP_CHECK_1(elem,SV*,oom_array_extend);
a3b680e6 2945 }
2b573ace 2946#endif
3280af22 2947 if (!svp || *svp == &PL_sv_undef) {
68dc0745
PP
2948 SV* lv;
2949 if (!defer)
cea2e8a9 2950 DIE(aTHX_ PL_no_aelem, elem);
68dc0745
PP
2951 lv = sv_newmortal();
2952 sv_upgrade(lv, SVt_PVLV);
2953 LvTYPE(lv) = 'y';
a0714e2c 2954 sv_magic(lv, NULL, PERL_MAGIC_defelem, NULL, 0);
68dc0745
PP
2955 LvTARG(lv) = SvREFCNT_inc(av);
2956 LvTARGOFF(lv) = elem;
2957 LvTARGLEN(lv) = 1;
2958 PUSHs(lv);
2959 RETURN;
2960 }
bfc4de9f 2961 if (PL_op->op_private & OPpLVAL_INTRO)
161b7d16 2962 save_aelem(av, elem, svp);
533c011a
NIS
2963 else if (PL_op->op_private & OPpDEREF)
2964 vivify_ref(*svp, PL_op->op_private & OPpDEREF);
a0d0e21e 2965 }
3280af22 2966 sv = (svp ? *svp : &PL_sv_undef);
be6c24e0
GS
2967 if (!lval && SvGMAGICAL(sv)) /* see note in pp_helem() */
2968 sv = sv_mortalcopy(sv);
2969 PUSHs(sv);
a0d0e21e
LW
2970 RETURN;
2971}
2972
02a9e968 2973void
864dbfa3 2974Perl_vivify_ref(pTHX_ SV *sv, U32 to_what)
02a9e968 2975{
5b295bef 2976 SvGETMAGIC(sv);
02a9e968
CS
2977 if (!SvOK(sv)) {
2978 if (SvREADONLY(sv))
cea2e8a9 2979 Perl_croak(aTHX_ PL_no_modify);
5f05dabc
PP
2980 if (SvTYPE(sv) < SVt_RV)
2981 sv_upgrade(sv, SVt_RV);
2982 else if (SvTYPE(sv) >= SVt_PV) {
8bd4d4c5 2983 SvPV_free(sv);
b162af07
SP
2984 SvLEN_set(sv, 0);
2985 SvCUR_set(sv, 0);
5f05dabc 2986 }
68dc0745 2987 switch (to_what) {
5f05dabc 2988 case OPpDEREF_SV:
561b68a9 2989 SvRV_set(sv, newSV(0));
5f05dabc
PP
2990 break;
2991 case OPpDEREF_AV:
b162af07 2992 SvRV_set(sv, (SV*)newAV());
5f05dabc
PP
2993 break;
2994 case OPpDEREF_HV:
b162af07 2995 SvRV_set(sv, (SV*)newHV());
5f05dabc
PP
2996 break;
2997 }
02a9e968
CS
2998 SvROK_on(sv);
2999 SvSETMAGIC(sv);
3000 }
3001}
3002
a0d0e21e
LW
3003PP(pp_method)
3004{
97aff369 3005 dVAR; dSP;
890ce7af 3006 SV* const sv = TOPs;
f5d5a27c
CS
3007
3008 if (SvROK(sv)) {
890ce7af 3009 SV* const rsv = SvRV(sv);
f5d5a27c
CS
3010 if (SvTYPE(rsv) == SVt_PVCV) {
3011 SETs(rsv);
3012 RETURN;
3013 }
3014 }
3015
4608196e 3016 SETs(method_common(sv, NULL));
f5d5a27c
CS
3017 RETURN;
3018}
3019
3020PP(pp_method_named)
3021{
97aff369 3022 dVAR; dSP;
890ce7af 3023 SV* const sv = cSVOP_sv;
c158a4fd 3024 U32 hash = SvSHARED_HASH(sv);
f5d5a27c
CS
3025
3026 XPUSHs(method_common(sv, &hash));
3027 RETURN;
3028}
3029
3030STATIC SV *
3031S_method_common(pTHX_ SV* meth, U32* hashp)
3032{
97aff369 3033 dVAR;
a0d0e21e
LW
3034 SV* ob;
3035 GV* gv;
56304f61 3036 HV* stash;
f5d5a27c 3037 STRLEN namelen;
6136c704 3038 const char* packname = NULL;
a0714e2c 3039 SV *packsv = NULL;
ac91690f 3040 STRLEN packlen;
46c461b5
AL
3041 const char * const name = SvPV_const(meth, namelen);
3042 SV * const sv = *(PL_stack_base + TOPMARK + 1);
f5d5a27c 3043
4f1b7578
SC
3044 if (!sv)
3045 Perl_croak(aTHX_ "Can't call method \"%s\" on an undefined value", name);
3046
5b295bef 3047 SvGETMAGIC(sv);
a0d0e21e 3048 if (SvROK(sv))
16d20bd9 3049 ob = (SV*)SvRV(sv);
a0d0e21e
LW
3050 else {
3051 GV* iogv;
a0d0e21e 3052
af09ea45 3053 /* this isn't a reference */
5c144d81 3054 if(SvOK(sv) && (packname = SvPV_const(sv, packlen))) {
b464bac0 3055 const HE* const he = hv_fetch_ent(PL_stashcache, sv, 0, 0);
081fc587 3056 if (he) {
5e6396ae 3057 stash = INT2PTR(HV*,SvIV(HeVAL(he)));
081fc587
AB
3058 goto fetch;
3059 }
3060 }
3061
a0d0e21e 3062 if (!SvOK(sv) ||
05f5af9a 3063 !(packname) ||
f776e3cd 3064 !(iogv = gv_fetchsv(sv, 0, SVt_PVIO)) ||
a0d0e21e
LW
3065 !(ob=(SV*)GvIO(iogv)))
3066 {
af09ea45 3067 /* this isn't the name of a filehandle either */
1c846c1f 3068 if (!packname ||
fd400ab9 3069 ((UTF8_IS_START(*packname) && DO_UTF8(sv))
b86a2fa7 3070 ? !isIDFIRST_utf8((U8*)packname)
834a4ddd
LW
3071 : !isIDFIRST(*packname)
3072 ))
3073 {
f5d5a27c
CS
3074 Perl_croak(aTHX_ "Can't call method \"%s\" %s", name,
3075 SvOK(sv) ? "without a package or object reference"
3076 : "on an undefined value");
834a4ddd 3077 }
af09ea45
IK
3078 /* assume it's a package name */
3079 stash = gv_stashpvn(packname, packlen, FALSE);
0dae17bd
GS
3080 if (!stash)
3081 packsv = sv;
081fc587 3082 else {
5e6396ae 3083 SV* ref = newSViv(PTR2IV(stash));
7e8961ec
AB
3084 hv_store(PL_stashcache, packname, packlen, ref, 0);
3085 }
ac91690f 3086 goto fetch;
a0d0e21e 3087 }
af09ea45 3088 /* it _is_ a filehandle name -- replace with a reference */
3280af22 3089 *(PL_stack_base + TOPMARK + 1) = sv_2mortal(newRV((SV*)iogv));
a0d0e21e
LW
3090 }
3091
af09ea45 3092 /* if we got here, ob should be a reference or a glob */
f0d43078
GS
3093 if (!ob || !(SvOBJECT(ob)
3094 || (SvTYPE(ob) == SVt_PVGV && (ob = (SV*)GvIO((GV*)ob))
3095 && SvOBJECT(ob))))
3096 {
f5d5a27c
CS
3097 Perl_croak(aTHX_ "Can't call method \"%s\" on unblessed reference",
3098 name);
f0d43078 3099 }
a0d0e21e 3100
56304f61 3101 stash = SvSTASH(ob);
a0d0e21e 3102
ac91690f 3103 fetch:
af09ea45
IK
3104 /* NOTE: stash may be null, hope hv_fetch_ent and
3105 gv_fetchmethod can cope (it seems they can) */
3106
f5d5a27c
CS
3107 /* shortcut for simple names */
3108 if (hashp) {
b464bac0 3109 const HE* const he = hv_fetch_ent(stash, meth, 0, *hashp);
f5d5a27c
CS
3110 if (he) {
3111 gv = (GV*)HeVAL(he);
3112 if (isGV(gv) && GvCV(gv) &&
3113 (!GvCVGEN(gv) || GvCVGEN(gv) == PL_sub_generation))
3114 return (SV*)GvCV(gv);
3115 }
3116 }
3117
0dae17bd 3118 gv = gv_fetchmethod(stash ? stash : (HV*)packsv, name);
af09ea45 3119
56304f61 3120 if (!gv) {
af09ea45
IK
3121 /* This code tries to figure out just what went wrong with
3122 gv_fetchmethod. It therefore needs to duplicate a lot of
3123 the internals of that function. We can't move it inside
3124 Perl_gv_fetchmethod_autoload(), however, since that would
3125 cause UNIVERSAL->can("NoSuchPackage::foo") to croak, and we
3126 don't want that.
3127 */
a9c4fd4e 3128 const char* leaf = name;
6136c704 3129 const char* sep = NULL;
a9c4fd4e 3130 const char* p;
56304f61
CS
3131
3132 for (p = name; *p; p++) {
3133 if (*p == '\'')
3134 sep = p, leaf = p + 1;
3135 else if (*p == ':' && *(p + 1) == ':')
3136 sep = p, leaf = p + 2;
3137 }
3138 if (!sep || ((sep - name) == 5 && strnEQ(name, "SUPER", 5))) {
9b9d0b15
NC
3139 /* the method name is unqualified or starts with SUPER:: */
3140 bool need_strlen = 1;
3141 if (sep) {
3142 packname = CopSTASHPV(PL_curcop);
3143 }
3144 else if (stash) {
46c461b5 3145 HEK * const packhek = HvNAME_HEK(stash);
9b9d0b15
NC
3146 if (packhek) {
3147 packname = HEK_KEY(packhek);
3148 packlen = HEK_LEN(packhek);
3149 need_strlen = 0;
3150 } else {
3151 goto croak;
3152 }
3153 }
3154
3155 if (!packname) {
3156 croak:
e27ad1f2
AV
3157 Perl_croak(aTHX_
3158 "Can't use anonymous symbol table for method lookup");
9b9d0b15
NC
3159 }
3160 else if (need_strlen)
e27ad1f2 3161 packlen = strlen(packname);
9b9d0b15 3162
56304f61
CS
3163 }
3164 else {
af09ea45 3165 /* the method name is qualified */
56304f61
CS
3166 packname = name;
3167 packlen = sep - name;
3168 }
af09ea45
IK
3169
3170 /* we're relying on gv_fetchmethod not autovivifying the stash */
3171 if (gv_stashpvn(packname, packlen, FALSE)) {
c1899e02 3172 Perl_croak(aTHX_
af09ea45
IK
3173 "Can't locate object method \"%s\" via package \"%.*s\"",
3174 leaf, (int)packlen, packname);
c1899e02
GS
3175 }
3176 else {
3177 Perl_croak(aTHX_
af09ea45
IK
3178 "Can't locate object method \"%s\" via package \"%.*s\""
3179 " (perhaps you forgot to load \"%.*s\"?)",
3180 leaf, (int)packlen, packname, (int)packlen, packname);
c1899e02 3181 }
56304f61 3182 }
f5d5a27c 3183 return isGV(gv) ? (SV*)GvCV(gv) : (SV*)gv;
a0d0e21e 3184}
241d1a3b
NC
3185
3186/*
3187 * Local variables:
3188 * c-indentation-style: bsd
3189 * c-basic-offset: 4
3190 * indent-tabs-mode: t
3191 * End:
3192 *
37442d52
RGS
3193 * ex: set ts=8 sts=4 sw=4 noet:
3194 */