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common test code for timed bail
[perl5.git] / pp_hot.c
CommitLineData
a0d0e21e
LW
1/* pp_hot.c
2 *
4bb101f2 3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
fdf8c088 4 * 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 by Larry Wall and others
a0d0e21e
LW
5 *
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
8 *
9 */
10
11/*
12 * Then he heard Merry change the note, and up went the Horn-cry of Buckland,
13 * shaking the air.
14 *
15 * Awake! Awake! Fear, Fire, Foes! Awake!
16 * Fire, Foes! Awake!
17 */
18
166f8a29
DM
19/* This file contains 'hot' pp ("push/pop") functions that
20 * execute the opcodes that make up a perl program. A typical pp function
21 * expects to find its arguments on the stack, and usually pushes its
22 * results onto the stack, hence the 'pp' terminology. Each OP structure
23 * contains a pointer to the relevant pp_foo() function.
24 *
25 * By 'hot', we mean common ops whose execution speed is critical.
26 * By gathering them together into a single file, we encourage
27 * CPU cache hits on hot code. Also it could be taken as a warning not to
28 * change any code in this file unless you're sure it won't affect
29 * performance.
30 */
31
a0d0e21e 32#include "EXTERN.h"
864dbfa3 33#define PERL_IN_PP_HOT_C
a0d0e21e
LW
34#include "perl.h"
35
36/* Hot code. */
37
38PP(pp_const)
39{
97aff369 40 dVAR;
39644a26 41 dSP;
996c9baa 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
74PP(pp_pushmark)
75{
97aff369 76 dVAR;
3280af22 77 PUSHMARK(PL_stack_sp);
a0d0e21e
LW
78 return NORMAL;
79}
80
81PP(pp_stringify)
82{
97aff369 83 dVAR; dSP; dTARGET;
6050d10e 84 sv_copypv(TARG,TOPs);
a0d0e21e
LW
85 SETTARG;
86 RETURN;
87}
88
89PP(pp_gv)
90{
97aff369 91 dVAR; dSP;
1d7c1841 92 XPUSHs((SV*)cGVOP_gv);
a0d0e21e
LW
93 RETURN;
94}
95
96PP(pp_and)
97{
97aff369 98 dVAR; dSP;
a0d0e21e
LW
99 if (!SvTRUE(TOPs))
100 RETURN;
101 else {
c960fc3b
SP
102 if (PL_op->op_type == OP_AND)
103 --SP;
a0d0e21e
LW
104 RETURNOP(cLOGOP->op_other);
105 }
106}
107
108PP(pp_sassign)
109{
97aff369 110 dVAR; dSP; dPOPTOPssrl;
748a9306 111
533c011a 112 if (PL_op->op_private & OPpASSIGN_BACKWARDS) {
0bd48802
AL
113 SV * const temp = left;
114 left = right; right = temp;
a0d0e21e 115 }
3280af22 116 if (PL_tainting && PL_tainted && !SvTAINTED(left))
a0d0e21e 117 TAINT_NOT;
e26df76a 118 if (PL_op->op_private & OPpASSIGN_CV_TO_GV) {
6136c704 119 SV * const cv = SvRV(left);
e26df76a
NC
120 const U32 cv_type = SvTYPE(cv);
121 const U32 gv_type = SvTYPE(right);
6136c704 122 const bool got_coderef = cv_type == SVt_PVCV || cv_type == SVt_PVFM;
e26df76a
NC
123
124 if (!got_coderef) {
125 assert(SvROK(cv));
126 }
127
ae6d515f 128 /* Can do the optimisation if right (LVALUE) is not a typeglob,
e26df76a
NC
129 left (RVALUE) is a reference to something, and we're in void
130 context. */
131 if (!got_coderef && gv_type != SVt_PVGV && GIMME_V == G_VOID) {
132 /* Is the target symbol table currently empty? */
6136c704 133 GV * const gv = gv_fetchsv(right, GV_NOINIT, SVt_PVGV);
bb112e5a 134 if (SvTYPE(gv) != SVt_PVGV && !SvOK(gv)) {
e26df76a
NC
135 /* Good. Create a new proxy constant subroutine in the target.
136 The gv becomes a(nother) reference to the constant. */
137 SV *const value = SvRV(cv);
138
4df7f6af 139 SvUPGRADE((SV *)gv, SVt_IV);
1ccdb730 140 SvPCS_IMPORTED_on(gv);
e26df76a 141 SvRV_set(gv, value);
b37c2d43 142 SvREFCNT_inc_simple_void(value);
e26df76a
NC
143 SETs(right);
144 RETURN;
145 }
146 }
147
148 /* Need to fix things up. */
149 if (gv_type != SVt_PVGV) {
150 /* Need to fix GV. */
151 right = (SV*)gv_fetchsv(right, GV_ADD, SVt_PVGV);
152 }
153
154 if (!got_coderef) {
155 /* We've been returned a constant rather than a full subroutine,
156 but they expect a subroutine reference to apply. */
53a42478
NC
157 if (SvROK(cv)) {
158 ENTER;
159 SvREFCNT_inc_void(SvRV(cv));
160 /* newCONSTSUB takes a reference count on the passed in SV
161 from us. We set the name to NULL, otherwise we get into
162 all sorts of fun as the reference to our new sub is
163 donated to the GV that we're about to assign to.
164 */
165 SvRV_set(left, (SV *)newCONSTSUB(GvSTASH(right), NULL,
e26df76a 166 SvRV(cv)));
53a42478
NC
167 SvREFCNT_dec(cv);
168 LEAVE;
169 } else {
170 /* What can happen for the corner case *{"BONK"} = \&{"BONK"};
171 is that
172 First: ops for \&{"BONK"}; return us the constant in the
173 symbol table
174 Second: ops for *{"BONK"} cause that symbol table entry
175 (and our reference to it) to be upgraded from RV
176 to typeblob)
177 Thirdly: We get here. cv is actually PVGV now, and its
178 GvCV() is actually the subroutine we're looking for
179
180 So change the reference so that it points to the subroutine
181 of that typeglob, as that's what they were after all along.
182 */
183 GV *const upgraded = (GV *) cv;
184 CV *const source = GvCV(upgraded);
185
186 assert(source);
187 assert(CvFLAGS(source) & CVf_CONST);
188
189 SvREFCNT_inc_void(source);
190 SvREFCNT_dec(upgraded);
191 SvRV_set(left, (SV *)source);
192 }
e26df76a 193 }
53a42478 194
e26df76a 195 }
54310121 196 SvSetMagicSV(right, left);
a0d0e21e
LW
197 SETs(right);
198 RETURN;
199}
200
201PP(pp_cond_expr)
202{
97aff369 203 dVAR; dSP;
a0d0e21e 204 if (SvTRUEx(POPs))
1a67a97c 205 RETURNOP(cLOGOP->op_other);
a0d0e21e 206 else
1a67a97c 207 RETURNOP(cLOGOP->op_next);
a0d0e21e
LW
208}
209
210PP(pp_unstack)
211{
97aff369 212 dVAR;
a0d0e21e
LW
213 I32 oldsave;
214 TAINT_NOT; /* Each statement is presumed innocent */
3280af22 215 PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
a0d0e21e 216 FREETMPS;
3280af22 217 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e
LW
218 LEAVE_SCOPE(oldsave);
219 return NORMAL;
220}
221
a0d0e21e
LW
222PP(pp_concat)
223{
97aff369 224 dVAR; dSP; dATARGET; tryAMAGICbin(concat,opASSIGN);
748a9306
LW
225 {
226 dPOPTOPssrl;
8d6d96c1
HS
227 bool lbyte;
228 STRLEN rlen;
d4c19fe8 229 const char *rpv = NULL;
a6b599c7 230 bool rbyte = FALSE;
a9c4fd4e 231 bool rcopied = FALSE;
8d6d96c1
HS
232
233 if (TARG == right && right != left) {
c75ab21a
RH
234 /* mg_get(right) may happen here ... */
235 rpv = SvPV_const(right, rlen);
236 rbyte = !DO_UTF8(right);
59cd0e26 237 right = newSVpvn_flags(rpv, rlen, SVs_TEMP);
349d4f2f 238 rpv = SvPV_const(right, rlen); /* no point setting UTF-8 here */
db79b45b 239 rcopied = TRUE;
8d6d96c1 240 }
7889fe52 241
8d6d96c1 242 if (TARG != left) {
a9c4fd4e 243 STRLEN llen;
5c144d81 244 const char* const lpv = SvPV_const(left, llen); /* mg_get(left) may happen here */
90f5826e 245 lbyte = !DO_UTF8(left);
8d6d96c1
HS
246 sv_setpvn(TARG, lpv, llen);
247 if (!lbyte)
248 SvUTF8_on(TARG);
249 else
250 SvUTF8_off(TARG);
251 }
252 else { /* TARG == left */
a9c4fd4e 253 STRLEN llen;
5b295bef 254 SvGETMAGIC(left); /* or mg_get(left) may happen here */
c75ab21a
RH
255 if (!SvOK(TARG)) {
256 if (left == right && ckWARN(WARN_UNINITIALIZED))
257 report_uninit(right);
c69006e4 258 sv_setpvn(left, "", 0);
c75ab21a 259 }
10516c54 260 (void)SvPV_nomg_const(left, llen); /* Needed to set UTF8 flag */
90f5826e
ST
261 lbyte = !DO_UTF8(left);
262 if (IN_BYTES)
263 SvUTF8_off(TARG);
8d6d96c1 264 }
a12c0f56 265
c75ab21a
RH
266 /* or mg_get(right) may happen here */
267 if (!rcopied) {
268 rpv = SvPV_const(right, rlen);
269 rbyte = !DO_UTF8(right);
270 }
8d6d96c1
HS
271 if (lbyte != rbyte) {
272 if (lbyte)
273 sv_utf8_upgrade_nomg(TARG);
274 else {
db79b45b 275 if (!rcopied)
59cd0e26 276 right = newSVpvn_flags(rpv, rlen, SVs_TEMP);
8d6d96c1 277 sv_utf8_upgrade_nomg(right);
349d4f2f 278 rpv = SvPV_const(right, rlen);
69b47968 279 }
a0d0e21e 280 }
8d6d96c1 281 sv_catpvn_nomg(TARG, rpv, rlen);
43ebc500 282
a0d0e21e
LW
283 SETTARG;
284 RETURN;
748a9306 285 }
a0d0e21e
LW
286}
287
288PP(pp_padsv)
289{
97aff369 290 dVAR; dSP; dTARGET;
a0d0e21e 291 XPUSHs(TARG);
533c011a
NIS
292 if (PL_op->op_flags & OPf_MOD) {
293 if (PL_op->op_private & OPpLVAL_INTRO)
952306ac
RGS
294 if (!(PL_op->op_private & OPpPAD_STATE))
295 SAVECLEARSV(PAD_SVl(PL_op->op_targ));
a62b51b8 296 if (PL_op->op_private & OPpDEREF) {
8ec5e241 297 PUTBACK;
dd2155a4 298 vivify_ref(PAD_SVl(PL_op->op_targ), PL_op->op_private & OPpDEREF);
8ec5e241
NIS
299 SPAGAIN;
300 }
4633a7c4 301 }
a0d0e21e
LW
302 RETURN;
303}
304
305PP(pp_readline)
306{
97aff369 307 dVAR;
f5284f61 308 tryAMAGICunTARGET(iter, 0);
3280af22 309 PL_last_in_gv = (GV*)(*PL_stack_sp--);
8efb3254 310 if (SvTYPE(PL_last_in_gv) != SVt_PVGV) {
1c846c1f 311 if (SvROK(PL_last_in_gv) && SvTYPE(SvRV(PL_last_in_gv)) == SVt_PVGV)
f5284f61 312 PL_last_in_gv = (GV*)SvRV(PL_last_in_gv);
8efb3254 313 else {
f5284f61
IZ
314 dSP;
315 XPUSHs((SV*)PL_last_in_gv);
316 PUTBACK;
cea2e8a9 317 pp_rv2gv();
f5284f61 318 PL_last_in_gv = (GV*)(*PL_stack_sp--);
f5284f61
IZ
319 }
320 }
a0d0e21e
LW
321 return do_readline();
322}
323
324PP(pp_eq)
325{
97aff369 326 dVAR; dSP; tryAMAGICbinSET(eq,0);
4c9fe80f 327#ifndef NV_PRESERVES_UV
0bdaccee 328 if (SvROK(TOPs) && !SvAMAGIC(TOPs) && SvROK(TOPm1s) && !SvAMAGIC(TOPm1s)) {
e61d22ef
NC
329 SP--;
330 SETs(boolSV(SvRV(TOPs) == SvRV(TOPp1s)));
4c9fe80f
AS
331 RETURN;
332 }
333#endif
28e5dec8
JH
334#ifdef PERL_PRESERVE_IVUV
335 SvIV_please(TOPs);
336 if (SvIOK(TOPs)) {
4c9fe80f
AS
337 /* Unless the left argument is integer in range we are going
338 to have to use NV maths. Hence only attempt to coerce the
339 right argument if we know the left is integer. */
28e5dec8
JH
340 SvIV_please(TOPm1s);
341 if (SvIOK(TOPm1s)) {
0bd48802
AL
342 const bool auvok = SvUOK(TOPm1s);
343 const bool buvok = SvUOK(TOPs);
a12c0f56 344
1605159e
NC
345 if (auvok == buvok) { /* ## IV == IV or UV == UV ## */
346 /* Casting IV to UV before comparison isn't going to matter
347 on 2s complement. On 1s complement or sign&magnitude
348 (if we have any of them) it could to make negative zero
349 differ from normal zero. As I understand it. (Need to
350 check - is negative zero implementation defined behaviour
351 anyway?). NWC */
0bd48802
AL
352 const UV buv = SvUVX(POPs);
353 const UV auv = SvUVX(TOPs);
28e5dec8 354
28e5dec8
JH
355 SETs(boolSV(auv == buv));
356 RETURN;
357 }
358 { /* ## Mixed IV,UV ## */
1605159e 359 SV *ivp, *uvp;
28e5dec8 360 IV iv;
28e5dec8 361
1605159e 362 /* == is commutative so doesn't matter which is left or right */
28e5dec8 363 if (auvok) {
1605159e
NC
364 /* top of stack (b) is the iv */
365 ivp = *SP;
366 uvp = *--SP;
367 } else {
368 uvp = *SP;
369 ivp = *--SP;
370 }
371 iv = SvIVX(ivp);
d4c19fe8 372 if (iv < 0)
1605159e
NC
373 /* As uv is a UV, it's >0, so it cannot be == */
374 SETs(&PL_sv_no);
d4c19fe8
AL
375 else
376 /* we know iv is >= 0 */
377 SETs(boolSV((UV)iv == SvUVX(uvp)));
28e5dec8
JH
378 RETURN;
379 }
380 }
381 }
382#endif
a0d0e21e 383 {
cab190d4
JD
384#if defined(NAN_COMPARE_BROKEN) && defined(Perl_isnan)
385 dPOPTOPnnrl;
386 if (Perl_isnan(left) || Perl_isnan(right))
387 RETSETNO;
388 SETs(boolSV(left == right));
389#else
a0d0e21e 390 dPOPnv;
54310121 391 SETs(boolSV(TOPn == value));
cab190d4 392#endif
a0d0e21e
LW
393 RETURN;
394 }
395}
396
397PP(pp_preinc)
398{
97aff369 399 dVAR; dSP;
f39684df 400 if (SvTYPE(TOPs) >= SVt_PVGV && SvTYPE(TOPs) != SVt_PVLV)
d470f89e 401 DIE(aTHX_ PL_no_modify);
3510b4a1
NC
402 if (!SvREADONLY(TOPs) && SvIOK_notUV(TOPs) && !SvNOK(TOPs) && !SvPOK(TOPs)
403 && SvIVX(TOPs) != IV_MAX)
55497cff 404 {
45977657 405 SvIV_set(TOPs, SvIVX(TOPs) + 1);
55497cff 406 SvFLAGS(TOPs) &= ~(SVp_NOK|SVp_POK);
748a9306 407 }
28e5dec8 408 else /* Do all the PERL_PRESERVE_IVUV conditionals in sv_inc */
748a9306 409 sv_inc(TOPs);
a0d0e21e
LW
410 SvSETMAGIC(TOPs);
411 return NORMAL;
412}
413
414PP(pp_or)
415{
97aff369 416 dVAR; dSP;
a0d0e21e
LW
417 if (SvTRUE(TOPs))
418 RETURN;
419 else {
c960fc3b
SP
420 if (PL_op->op_type == OP_OR)
421 --SP;
a0d0e21e
LW
422 RETURNOP(cLOGOP->op_other);
423 }
424}
425
25a55bd7 426PP(pp_defined)
c963b151 427{
97aff369 428 dVAR; dSP;
6136c704
AL
429 register SV* sv;
430 bool defined;
25a55bd7 431 const int op_type = PL_op->op_type;
ea5195b7 432 const bool is_dor = (op_type == OP_DOR || op_type == OP_DORASSIGN);
c963b151 433
6136c704 434 if (is_dor) {
25a55bd7
SP
435 sv = TOPs;
436 if (!sv || !SvANY(sv)) {
2bd49cfc
NC
437 if (op_type == OP_DOR)
438 --SP;
25a55bd7
SP
439 RETURNOP(cLOGOP->op_other);
440 }
b7c44293
RGS
441 }
442 else {
443 /* OP_DEFINED */
25a55bd7
SP
444 sv = POPs;
445 if (!sv || !SvANY(sv))
446 RETPUSHNO;
b7c44293 447 }
25a55bd7 448
6136c704 449 defined = FALSE;
c963b151
BD
450 switch (SvTYPE(sv)) {
451 case SVt_PVAV:
452 if (AvMAX(sv) >= 0 || SvGMAGICAL(sv) || (SvRMAGICAL(sv) && mg_find(sv, PERL_MAGIC_tied)))
25a55bd7 453 defined = TRUE;
c963b151
BD
454 break;
455 case SVt_PVHV:
456 if (HvARRAY(sv) || SvGMAGICAL(sv) || (SvRMAGICAL(sv) && mg_find(sv, PERL_MAGIC_tied)))
25a55bd7 457 defined = TRUE;
c963b151
BD
458 break;
459 case SVt_PVCV:
460 if (CvROOT(sv) || CvXSUB(sv))
25a55bd7 461 defined = TRUE;
c963b151
BD
462 break;
463 default:
5b295bef 464 SvGETMAGIC(sv);
c963b151 465 if (SvOK(sv))
25a55bd7 466 defined = TRUE;
6136c704 467 break;
c963b151 468 }
6136c704
AL
469
470 if (is_dor) {
c960fc3b
SP
471 if(defined)
472 RETURN;
473 if(op_type == OP_DOR)
474 --SP;
25a55bd7 475 RETURNOP(cLOGOP->op_other);
25a55bd7 476 }
d9aa96a4
SP
477 /* assuming OP_DEFINED */
478 if(defined)
479 RETPUSHYES;
480 RETPUSHNO;
c963b151
BD
481}
482
a0d0e21e
LW
483PP(pp_add)
484{
800401ee
JH
485 dVAR; dSP; dATARGET; bool useleft; SV *svl, *svr;
486 tryAMAGICbin(add,opASSIGN);
487 svl = sv_2num(TOPm1s);
488 svr = sv_2num(TOPs);
489 useleft = USE_LEFT(svl);
28e5dec8
JH
490#ifdef PERL_PRESERVE_IVUV
491 /* We must see if we can perform the addition with integers if possible,
492 as the integer code detects overflow while the NV code doesn't.
493 If either argument hasn't had a numeric conversion yet attempt to get
494 the IV. It's important to do this now, rather than just assuming that
495 it's not IOK as a PV of "9223372036854775806" may not take well to NV
496 addition, and an SV which is NOK, NV=6.0 ought to be coerced to
497 integer in case the second argument is IV=9223372036854775806
498 We can (now) rely on sv_2iv to do the right thing, only setting the
499 public IOK flag if the value in the NV (or PV) slot is truly integer.
500
501 A side effect is that this also aggressively prefers integer maths over
7dca457a
NC
502 fp maths for integer values.
503
a00b5bd3 504 How to detect overflow?
7dca457a
NC
505
506 C 99 section 6.2.6.1 says
507
508 The range of nonnegative values of a signed integer type is a subrange
509 of the corresponding unsigned integer type, and the representation of
510 the same value in each type is the same. A computation involving
511 unsigned operands can never overflow, because a result that cannot be
512 represented by the resulting unsigned integer type is reduced modulo
513 the number that is one greater than the largest value that can be
514 represented by the resulting type.
515
516 (the 9th paragraph)
517
518 which I read as "unsigned ints wrap."
519
520 signed integer overflow seems to be classed as "exception condition"
521
522 If an exceptional condition occurs during the evaluation of an
523 expression (that is, if the result is not mathematically defined or not
524 in the range of representable values for its type), the behavior is
525 undefined.
526
527 (6.5, the 5th paragraph)
528
529 I had assumed that on 2s complement machines signed arithmetic would
530 wrap, hence coded pp_add and pp_subtract on the assumption that
531 everything perl builds on would be happy. After much wailing and
532 gnashing of teeth it would seem that irix64 knows its ANSI spec well,
533 knows that it doesn't need to, and doesn't. Bah. Anyway, the all-
534 unsigned code below is actually shorter than the old code. :-)
535 */
536
800401ee
JH
537 SvIV_please(svr);
538 if (SvIOK(svr)) {
28e5dec8
JH
539 /* Unless the left argument is integer in range we are going to have to
540 use NV maths. Hence only attempt to coerce the right argument if
541 we know the left is integer. */
9c5ffd7c
JH
542 register UV auv = 0;
543 bool auvok = FALSE;
7dca457a
NC
544 bool a_valid = 0;
545
28e5dec8 546 if (!useleft) {
7dca457a
NC
547 auv = 0;
548 a_valid = auvok = 1;
549 /* left operand is undef, treat as zero. + 0 is identity,
550 Could SETi or SETu right now, but space optimise by not adding
551 lots of code to speed up what is probably a rarish case. */
552 } else {
553 /* Left operand is defined, so is it IV? */
800401ee
JH
554 SvIV_please(svl);
555 if (SvIOK(svl)) {
556 if ((auvok = SvUOK(svl)))
557 auv = SvUVX(svl);
7dca457a 558 else {
800401ee 559 register const IV aiv = SvIVX(svl);
7dca457a
NC
560 if (aiv >= 0) {
561 auv = aiv;
562 auvok = 1; /* Now acting as a sign flag. */
563 } else { /* 2s complement assumption for IV_MIN */
564 auv = (UV)-aiv;
565 }
566 }
567 a_valid = 1;
28e5dec8
JH
568 }
569 }
7dca457a
NC
570 if (a_valid) {
571 bool result_good = 0;
572 UV result;
573 register UV buv;
800401ee 574 bool buvok = SvUOK(svr);
a00b5bd3 575
7dca457a 576 if (buvok)
800401ee 577 buv = SvUVX(svr);
7dca457a 578 else {
800401ee 579 register const IV biv = SvIVX(svr);
7dca457a
NC
580 if (biv >= 0) {
581 buv = biv;
582 buvok = 1;
583 } else
584 buv = (UV)-biv;
585 }
586 /* ?uvok if value is >= 0. basically, flagged as UV if it's +ve,
602f51c4 587 else "IV" now, independent of how it came in.
7dca457a
NC
588 if a, b represents positive, A, B negative, a maps to -A etc
589 a + b => (a + b)
590 A + b => -(a - b)
591 a + B => (a - b)
592 A + B => -(a + b)
593 all UV maths. negate result if A negative.
594 add if signs same, subtract if signs differ. */
595
596 if (auvok ^ buvok) {
597 /* Signs differ. */
598 if (auv >= buv) {
599 result = auv - buv;
600 /* Must get smaller */
601 if (result <= auv)
602 result_good = 1;
603 } else {
604 result = buv - auv;
605 if (result <= buv) {
606 /* result really should be -(auv-buv). as its negation
607 of true value, need to swap our result flag */
608 auvok = !auvok;
609 result_good = 1;
28e5dec8
JH
610 }
611 }
7dca457a
NC
612 } else {
613 /* Signs same */
614 result = auv + buv;
615 if (result >= auv)
616 result_good = 1;
617 }
618 if (result_good) {
619 SP--;
620 if (auvok)
28e5dec8 621 SETu( result );
7dca457a
NC
622 else {
623 /* Negate result */
624 if (result <= (UV)IV_MIN)
625 SETi( -(IV)result );
626 else {
627 /* result valid, but out of range for IV. */
628 SETn( -(NV)result );
28e5dec8
JH
629 }
630 }
7dca457a
NC
631 RETURN;
632 } /* Overflow, drop through to NVs. */
28e5dec8
JH
633 }
634 }
635#endif
a0d0e21e 636 {
4efa5a16
RD
637 NV value = SvNV(svr);
638 (void)POPs;
28e5dec8
JH
639 if (!useleft) {
640 /* left operand is undef, treat as zero. + 0.0 is identity. */
641 SETn(value);
642 RETURN;
643 }
4efa5a16 644 SETn( value + SvNV(svl) );
28e5dec8 645 RETURN;
a0d0e21e
LW
646 }
647}
648
649PP(pp_aelemfast)
650{
97aff369 651 dVAR; dSP;
c445ea15 652 AV * const av = PL_op->op_flags & OPf_SPECIAL ?
6a077020 653 (AV*)PAD_SV(PL_op->op_targ) : GvAV(cGVOP_gv);
a3b680e6 654 const U32 lval = PL_op->op_flags & OPf_MOD;
0bd48802 655 SV** const svp = av_fetch(av, PL_op->op_private, lval);
3280af22 656 SV *sv = (svp ? *svp : &PL_sv_undef);
6ff81951 657 EXTEND(SP, 1);
be6c24e0
GS
658 if (!lval && SvGMAGICAL(sv)) /* see note in pp_helem() */
659 sv = sv_mortalcopy(sv);
660 PUSHs(sv);
a0d0e21e
LW
661 RETURN;
662}
663
664PP(pp_join)
665{
97aff369 666 dVAR; dSP; dMARK; dTARGET;
a0d0e21e
LW
667 MARK++;
668 do_join(TARG, *MARK, MARK, SP);
669 SP = MARK;
670 SETs(TARG);
671 RETURN;
672}
673
674PP(pp_pushre)
675{
97aff369 676 dVAR; dSP;
44a8e56a
PP
677#ifdef DEBUGGING
678 /*
679 * We ass_u_me that LvTARGOFF() comes first, and that two STRLENs
680 * will be enough to hold an OP*.
681 */
c4420975 682 SV* const sv = sv_newmortal();
44a8e56a
PP
683 sv_upgrade(sv, SVt_PVLV);
684 LvTYPE(sv) = '/';
533c011a 685 Copy(&PL_op, &LvTARGOFF(sv), 1, OP*);
44a8e56a
PP
686 XPUSHs(sv);
687#else
6b88bc9c 688 XPUSHs((SV*)PL_op);
44a8e56a 689#endif
a0d0e21e
LW
690 RETURN;
691}
692
693/* Oversized hot code. */
694
695PP(pp_print)
696{
27da23d5 697 dVAR; dSP; dMARK; dORIGMARK;
a0d0e21e 698 IO *io;
760ac839 699 register PerlIO *fp;
236988e4 700 MAGIC *mg;
0bd48802 701 GV * const gv = (PL_op->op_flags & OPf_STACKED) ? (GV*)*++MARK : PL_defoutgv;
5b468f54
AMS
702
703 if (gv && (io = GvIO(gv))
704 && (mg = SvTIED_mg((SV*)io, PERL_MAGIC_tiedscalar)))
705 {
01bb7c6d 706 had_magic:
68dc0745 707 if (MARK == ORIGMARK) {
1c846c1f 708 /* If using default handle then we need to make space to
a60c0954
NIS
709 * pass object as 1st arg, so move other args up ...
710 */
4352c267 711 MEXTEND(SP, 1);
68dc0745
PP
712 ++MARK;
713 Move(MARK, MARK + 1, (SP - MARK) + 1, SV*);
714 ++SP;
715 }
716 PUSHMARK(MARK - 1);
5b468f54 717 *MARK = SvTIED_obj((SV*)io, mg);
68dc0745 718 PUTBACK;
236988e4 719 ENTER;
3a28f3fb
MS
720 if( PL_op->op_type == OP_SAY ) {
721 /* local $\ = "\n" */
084e50c2 722 SAVEGENERICSV(PL_ors_sv);
3a28f3fb
MS
723 PL_ors_sv = newSVpvs("\n");
724 }
864dbfa3 725 call_method("PRINT", G_SCALAR);
236988e4
PP
726 LEAVE;
727 SPAGAIN;
68dc0745
PP
728 MARK = ORIGMARK + 1;
729 *MARK = *SP;
730 SP = MARK;
236988e4
PP
731 RETURN;
732 }
a0d0e21e 733 if (!(io = GvIO(gv))) {
5b468f54
AMS
734 if ((GvEGV(gv)) && (io = GvIO(GvEGV(gv)))
735 && (mg = SvTIED_mg((SV*)io, PERL_MAGIC_tiedscalar)))
01bb7c6d 736 goto had_magic;
2dd78f96
JH
737 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
738 report_evil_fh(gv, io, PL_op->op_type);
93189314 739 SETERRNO(EBADF,RMS_IFI);
a0d0e21e
LW
740 goto just_say_no;
741 }
742 else if (!(fp = IoOFP(io))) {
599cee73 743 if (ckWARN2(WARN_CLOSED, WARN_IO)) {
4c80c0b2
NC
744 if (IoIFP(io))
745 report_evil_fh(gv, io, OP_phoney_INPUT_ONLY);
2dd78f96 746 else if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
bc37a18f 747 report_evil_fh(gv, io, PL_op->op_type);
a0d0e21e 748 }
93189314 749 SETERRNO(EBADF,IoIFP(io)?RMS_FAC:RMS_IFI);
a0d0e21e
LW
750 goto just_say_no;
751 }
752 else {
753 MARK++;
7889fe52 754 if (PL_ofs_sv && SvOK(PL_ofs_sv)) {
a0d0e21e
LW
755 while (MARK <= SP) {
756 if (!do_print(*MARK, fp))
757 break;
758 MARK++;
759 if (MARK <= SP) {
7889fe52 760 if (!do_print(PL_ofs_sv, fp)) { /* $, */
a0d0e21e
LW
761 MARK--;
762 break;
763 }
764 }
765 }
766 }
767 else {
768 while (MARK <= SP) {
769 if (!do_print(*MARK, fp))
770 break;
771 MARK++;
772 }
773 }
774 if (MARK <= SP)
775 goto just_say_no;
776 else {
cfc4a7da
GA
777 if (PL_op->op_type == OP_SAY) {
778 if (PerlIO_write(fp, "\n", 1) == 0 || PerlIO_error(fp))
779 goto just_say_no;
780 }
781 else if (PL_ors_sv && SvOK(PL_ors_sv))
7889fe52 782 if (!do_print(PL_ors_sv, fp)) /* $\ */
a0d0e21e
LW
783 goto just_say_no;
784
785 if (IoFLAGS(io) & IOf_FLUSH)
760ac839 786 if (PerlIO_flush(fp) == EOF)
a0d0e21e
LW
787 goto just_say_no;
788 }
789 }
790 SP = ORIGMARK;
e52fd6f4 791 XPUSHs(&PL_sv_yes);
a0d0e21e
LW
792 RETURN;
793
794 just_say_no:
795 SP = ORIGMARK;
e52fd6f4 796 XPUSHs(&PL_sv_undef);
a0d0e21e
LW
797 RETURN;
798}
799
800PP(pp_rv2av)
801{
97aff369 802 dVAR; dSP; dTOPss;
cde874ca 803 const I32 gimme = GIMME_V;
17ab7946
NC
804 static const char an_array[] = "an ARRAY";
805 static const char a_hash[] = "a HASH";
806 const bool is_pp_rv2av = PL_op->op_type == OP_RV2AV;
d83b45b8 807 const svtype type = is_pp_rv2av ? SVt_PVAV : SVt_PVHV;
a0d0e21e
LW
808
809 if (SvROK(sv)) {
810 wasref:
17ab7946 811 tryAMAGICunDEREF_var(is_pp_rv2av ? to_av_amg : to_hv_amg);
f5284f61 812
17ab7946
NC
813 sv = SvRV(sv);
814 if (SvTYPE(sv) != type)
815 DIE(aTHX_ "Not %s reference", is_pp_rv2av ? an_array : a_hash);
533c011a 816 if (PL_op->op_flags & OPf_REF) {
17ab7946 817 SETs(sv);
a0d0e21e
LW
818 RETURN;
819 }
78f9721b 820 else if (LVRET) {
cde874ca 821 if (gimme != G_ARRAY)
042560a6 822 goto croak_cant_return;
17ab7946 823 SETs(sv);
78f9721b
SM
824 RETURN;
825 }
82d03984
RGS
826 else if (PL_op->op_flags & OPf_MOD
827 && PL_op->op_private & OPpLVAL_INTRO)
828 Perl_croak(aTHX_ PL_no_localize_ref);
a0d0e21e
LW
829 }
830 else {
17ab7946 831 if (SvTYPE(sv) == type) {
533c011a 832 if (PL_op->op_flags & OPf_REF) {
17ab7946 833 SETs(sv);
a0d0e21e
LW
834 RETURN;
835 }
78f9721b 836 else if (LVRET) {
cde874ca 837 if (gimme != G_ARRAY)
042560a6 838 goto croak_cant_return;
17ab7946 839 SETs(sv);
78f9721b
SM
840 RETURN;
841 }
a0d0e21e
LW
842 }
843 else {
67955e0c 844 GV *gv;
1c846c1f 845
a0d0e21e
LW
846 if (SvTYPE(sv) != SVt_PVGV) {
847 if (SvGMAGICAL(sv)) {
848 mg_get(sv);
849 if (SvROK(sv))
850 goto wasref;
851 }
dc3c76f8
NC
852 gv = Perl_softref2xv(aTHX_ sv, is_pp_rv2av ? an_array : a_hash,
853 type, &sp);
854 if (!gv)
855 RETURN;
35cd451c
GS
856 }
857 else {
67955e0c 858 gv = (GV*)sv;
a0d0e21e 859 }
17ab7946 860 sv = is_pp_rv2av ? (SV*)GvAVn(gv) : (SV*)GvHVn(gv);
533c011a 861 if (PL_op->op_private & OPpLVAL_INTRO)
17ab7946 862 sv = is_pp_rv2av ? (SV*)save_ary(gv) : (SV*)save_hash(gv);
533c011a 863 if (PL_op->op_flags & OPf_REF) {
17ab7946 864 SETs(sv);
a0d0e21e
LW
865 RETURN;
866 }
78f9721b 867 else if (LVRET) {
cde874ca 868 if (gimme != G_ARRAY)
042560a6 869 goto croak_cant_return;
17ab7946 870 SETs(sv);
78f9721b
SM
871 RETURN;
872 }
a0d0e21e
LW
873 }
874 }
875
17ab7946
NC
876 if (is_pp_rv2av) {
877 AV *const av = (AV*)sv;
878 /* The guts of pp_rv2av, with no intenting change to preserve history
879 (until such time as we get tools that can do blame annotation across
880 whitespace changes. */
cde874ca 881 if (gimme == G_ARRAY) {
a3b680e6 882 const I32 maxarg = AvFILL(av) + 1;
c2444246 883 (void)POPs; /* XXXX May be optimized away? */
1c846c1f 884 EXTEND(SP, maxarg);
93965878 885 if (SvRMAGICAL(av)) {
1c846c1f 886 U32 i;
eb160463 887 for (i=0; i < (U32)maxarg; i++) {
0bcc34c2 888 SV ** const svp = av_fetch(av, i, FALSE);
547d1dd8
HS
889 /* See note in pp_helem, and bug id #27839 */
890 SP[i+1] = svp
891 ? SvGMAGICAL(*svp) ? sv_mortalcopy(*svp) : *svp
892 : &PL_sv_undef;
93965878 893 }
1c846c1f 894 }
93965878
NIS
895 else {
896 Copy(AvARRAY(av), SP+1, maxarg, SV*);
897 }
a0d0e21e
LW
898 SP += maxarg;
899 }
cde874ca 900 else if (gimme == G_SCALAR) {
a0d0e21e 901 dTARGET;
a3b680e6 902 const I32 maxarg = AvFILL(av) + 1;
f5284f61 903 SETi(maxarg);
a0d0e21e 904 }
17ab7946
NC
905 } else {
906 /* The guts of pp_rv2hv */
be85d344 907 if (gimme == G_ARRAY) { /* array wanted */
17ab7946 908 *PL_stack_sp = sv;
cea2e8a9 909 return do_kv();
a0d0e21e 910 }
be85d344 911 else if (gimme == G_SCALAR) {
a0d0e21e 912 dTARGET;
17ab7946 913 TARG = Perl_hv_scalar(aTHX_ (HV*)sv);
5e17dd7d 914 SPAGAIN;
a0d0e21e 915 SETTARG;
a0d0e21e 916 }
17ab7946 917 }
be85d344 918 RETURN;
042560a6
NC
919
920 croak_cant_return:
921 Perl_croak(aTHX_ "Can't return %s to lvalue scalar context",
922 is_pp_rv2av ? "array" : "hash");
77e217c6 923 RETURN;
a0d0e21e
LW
924}
925
10c8fecd
GS
926STATIC void
927S_do_oddball(pTHX_ HV *hash, SV **relem, SV **firstrelem)
928{
97aff369 929 dVAR;
7918f24d
NC
930
931 PERL_ARGS_ASSERT_DO_ODDBALL;
932
10c8fecd
GS
933 if (*relem) {
934 SV *tmpstr;
b464bac0 935 const HE *didstore;
6d822dc4
MS
936
937 if (ckWARN(WARN_MISC)) {
a3b680e6 938 const char *err;
10c8fecd
GS
939 if (relem == firstrelem &&
940 SvROK(*relem) &&
941 (SvTYPE(SvRV(*relem)) == SVt_PVAV ||
942 SvTYPE(SvRV(*relem)) == SVt_PVHV))
943 {
a3b680e6 944 err = "Reference found where even-sized list expected";
10c8fecd
GS
945 }
946 else
a3b680e6
AL
947 err = "Odd number of elements in hash assignment";
948 Perl_warner(aTHX_ packWARN(WARN_MISC), err);
10c8fecd 949 }
6d822dc4 950
561b68a9 951 tmpstr = newSV(0);
6d822dc4
MS
952 didstore = hv_store_ent(hash,*relem,tmpstr,0);
953 if (SvMAGICAL(hash)) {
954 if (SvSMAGICAL(tmpstr))
955 mg_set(tmpstr);
956 if (!didstore)
957 sv_2mortal(tmpstr);
958 }
959 TAINT_NOT;
10c8fecd
GS
960 }
961}
962
a0d0e21e
LW
963PP(pp_aassign)
964{
27da23d5 965 dVAR; dSP;
3280af22
NIS
966 SV **lastlelem = PL_stack_sp;
967 SV **lastrelem = PL_stack_base + POPMARK;
968 SV **firstrelem = PL_stack_base + POPMARK + 1;
a0d0e21e
LW
969 SV **firstlelem = lastrelem + 1;
970
971 register SV **relem;
972 register SV **lelem;
973
974 register SV *sv;
975 register AV *ary;
976
54310121 977 I32 gimme;
a0d0e21e
LW
978 HV *hash;
979 I32 i;
980 int magic;
ca65944e 981 int duplicates = 0;
cbbf8932 982 SV **firsthashrelem = NULL; /* "= 0" keeps gcc 2.95 quiet */
5637b936 983
3280af22 984 PL_delaymagic = DM_DELAY; /* catch simultaneous items */
ca65944e 985 gimme = GIMME_V;
a0d0e21e
LW
986
987 /* If there's a common identifier on both sides we have to take
988 * special care that assigning the identifier on the left doesn't
989 * clobber a value on the right that's used later in the list.
990 */
10c8fecd 991 if (PL_op->op_private & (OPpASSIGN_COMMON)) {
cc5e57d2 992 EXTEND_MORTAL(lastrelem - firstrelem + 1);
10c8fecd 993 for (relem = firstrelem; relem <= lastrelem; relem++) {
155aba94 994 if ((sv = *relem)) {
a1f49e72 995 TAINT_NOT; /* Each item is independent */
10c8fecd 996 *relem = sv_mortalcopy(sv);
a1f49e72 997 }
10c8fecd 998 }
a0d0e21e
LW
999 }
1000
1001 relem = firstrelem;
1002 lelem = firstlelem;
4608196e
RGS
1003 ary = NULL;
1004 hash = NULL;
10c8fecd 1005
a0d0e21e 1006 while (lelem <= lastlelem) {
bbce6d69 1007 TAINT_NOT; /* Each item stands on its own, taintwise. */
a0d0e21e
LW
1008 sv = *lelem++;
1009 switch (SvTYPE(sv)) {
1010 case SVt_PVAV:
1011 ary = (AV*)sv;
748a9306 1012 magic = SvMAGICAL(ary) != 0;
a0d0e21e 1013 av_clear(ary);
7e42bd57 1014 av_extend(ary, lastrelem - relem);
a0d0e21e
LW
1015 i = 0;
1016 while (relem <= lastrelem) { /* gobble up all the rest */
5117ca91 1017 SV **didstore;
a0d0e21e 1018 assert(*relem);
f2b990bf 1019 sv = newSVsv(*relem);
a0d0e21e 1020 *(relem++) = sv;
5117ca91
GS
1021 didstore = av_store(ary,i++,sv);
1022 if (magic) {
90630e3c
VP
1023 if (SvSMAGICAL(sv)) {
1024 /* More magic can happen in the mg_set callback, so we
1025 * backup the delaymagic for now. */
1026 U16 dmbak = PL_delaymagic;
1027 PL_delaymagic = 0;
fb73857a 1028 mg_set(sv);
90630e3c
VP
1029 PL_delaymagic = dmbak;
1030 }
5117ca91 1031 if (!didstore)
8127e0e3 1032 sv_2mortal(sv);
5117ca91 1033 }
bbce6d69 1034 TAINT_NOT;
a0d0e21e 1035 }
934dcd01
RD
1036 if (PL_delaymagic & DM_ARRAY)
1037 SvSETMAGIC((SV*)ary);
a0d0e21e 1038 break;
10c8fecd 1039 case SVt_PVHV: { /* normal hash */
a0d0e21e
LW
1040 SV *tmpstr;
1041
1042 hash = (HV*)sv;
748a9306 1043 magic = SvMAGICAL(hash) != 0;
a0d0e21e 1044 hv_clear(hash);
ca65944e 1045 firsthashrelem = relem;
a0d0e21e
LW
1046
1047 while (relem < lastrelem) { /* gobble up all the rest */
5117ca91 1048 HE *didstore;
6136c704
AL
1049 sv = *relem ? *relem : &PL_sv_no;
1050 relem++;
561b68a9 1051 tmpstr = newSV(0);
a0d0e21e
LW
1052 if (*relem)
1053 sv_setsv(tmpstr,*relem); /* value */
1054 *(relem++) = tmpstr;
ca65944e
RGS
1055 if (gimme != G_VOID && hv_exists_ent(hash, sv, 0))
1056 /* key overwrites an existing entry */
1057 duplicates += 2;
5117ca91
GS
1058 didstore = hv_store_ent(hash,sv,tmpstr,0);
1059 if (magic) {
90630e3c
VP
1060 if (SvSMAGICAL(tmpstr)) {
1061 U16 dmbak = PL_delaymagic;
1062 PL_delaymagic = 0;
fb73857a 1063 mg_set(tmpstr);
90630e3c
VP
1064 PL_delaymagic = dmbak;
1065 }
5117ca91 1066 if (!didstore)
8127e0e3 1067 sv_2mortal(tmpstr);
5117ca91 1068 }
bbce6d69 1069 TAINT_NOT;
8e07c86e 1070 }
6a0deba8 1071 if (relem == lastrelem) {
10c8fecd 1072 do_oddball(hash, relem, firstrelem);
6a0deba8 1073 relem++;
1930e939 1074 }
a0d0e21e
LW
1075 }
1076 break;
1077 default:
6fc92669
GS
1078 if (SvIMMORTAL(sv)) {
1079 if (relem <= lastrelem)
1080 relem++;
1081 break;
a0d0e21e
LW
1082 }
1083 if (relem <= lastrelem) {
1084 sv_setsv(sv, *relem);
1085 *(relem++) = sv;
1086 }
1087 else
3280af22 1088 sv_setsv(sv, &PL_sv_undef);
90630e3c
VP
1089
1090 if (SvSMAGICAL(sv)) {
1091 U16 dmbak = PL_delaymagic;
1092 PL_delaymagic = 0;
1093 mg_set(sv);
1094 PL_delaymagic = dmbak;
1095 }
a0d0e21e
LW
1096 break;
1097 }
1098 }
3280af22
NIS
1099 if (PL_delaymagic & ~DM_DELAY) {
1100 if (PL_delaymagic & DM_UID) {
a0d0e21e 1101#ifdef HAS_SETRESUID
fb934a90
RD
1102 (void)setresuid((PL_delaymagic & DM_RUID) ? PL_uid : (Uid_t)-1,
1103 (PL_delaymagic & DM_EUID) ? PL_euid : (Uid_t)-1,
1104 (Uid_t)-1);
56febc5e
AD
1105#else
1106# ifdef HAS_SETREUID
fb934a90
RD
1107 (void)setreuid((PL_delaymagic & DM_RUID) ? PL_uid : (Uid_t)-1,
1108 (PL_delaymagic & DM_EUID) ? PL_euid : (Uid_t)-1);
56febc5e
AD
1109# else
1110# ifdef HAS_SETRUID
b28d0864
NIS
1111 if ((PL_delaymagic & DM_UID) == DM_RUID) {
1112 (void)setruid(PL_uid);
1113 PL_delaymagic &= ~DM_RUID;
a0d0e21e 1114 }
56febc5e
AD
1115# endif /* HAS_SETRUID */
1116# ifdef HAS_SETEUID
b28d0864 1117 if ((PL_delaymagic & DM_UID) == DM_EUID) {
fb934a90 1118 (void)seteuid(PL_euid);
b28d0864 1119 PL_delaymagic &= ~DM_EUID;
a0d0e21e 1120 }
56febc5e 1121# endif /* HAS_SETEUID */
b28d0864
NIS
1122 if (PL_delaymagic & DM_UID) {
1123 if (PL_uid != PL_euid)
cea2e8a9 1124 DIE(aTHX_ "No setreuid available");
b28d0864 1125 (void)PerlProc_setuid(PL_uid);
a0d0e21e 1126 }
56febc5e
AD
1127# endif /* HAS_SETREUID */
1128#endif /* HAS_SETRESUID */
d8eceb89
JH
1129 PL_uid = PerlProc_getuid();
1130 PL_euid = PerlProc_geteuid();
a0d0e21e 1131 }
3280af22 1132 if (PL_delaymagic & DM_GID) {
a0d0e21e 1133#ifdef HAS_SETRESGID
fb934a90
RD
1134 (void)setresgid((PL_delaymagic & DM_RGID) ? PL_gid : (Gid_t)-1,
1135 (PL_delaymagic & DM_EGID) ? PL_egid : (Gid_t)-1,
1136 (Gid_t)-1);
56febc5e
AD
1137#else
1138# ifdef HAS_SETREGID
fb934a90
RD
1139 (void)setregid((PL_delaymagic & DM_RGID) ? PL_gid : (Gid_t)-1,
1140 (PL_delaymagic & DM_EGID) ? PL_egid : (Gid_t)-1);
56febc5e
AD
1141# else
1142# ifdef HAS_SETRGID
b28d0864
NIS
1143 if ((PL_delaymagic & DM_GID) == DM_RGID) {
1144 (void)setrgid(PL_gid);
1145 PL_delaymagic &= ~DM_RGID;
a0d0e21e 1146 }
56febc5e
AD
1147# endif /* HAS_SETRGID */
1148# ifdef HAS_SETEGID
b28d0864 1149 if ((PL_delaymagic & DM_GID) == DM_EGID) {
fb934a90 1150 (void)setegid(PL_egid);
b28d0864 1151 PL_delaymagic &= ~DM_EGID;
a0d0e21e 1152 }
56febc5e 1153# endif /* HAS_SETEGID */
b28d0864
NIS
1154 if (PL_delaymagic & DM_GID) {
1155 if (PL_gid != PL_egid)
cea2e8a9 1156 DIE(aTHX_ "No setregid available");
b28d0864 1157 (void)PerlProc_setgid(PL_gid);
a0d0e21e 1158 }
56febc5e
AD
1159# endif /* HAS_SETREGID */
1160#endif /* HAS_SETRESGID */
d8eceb89
JH
1161 PL_gid = PerlProc_getgid();
1162 PL_egid = PerlProc_getegid();
a0d0e21e 1163 }
3280af22 1164 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
a0d0e21e 1165 }
3280af22 1166 PL_delaymagic = 0;
54310121 1167
54310121
PP
1168 if (gimme == G_VOID)
1169 SP = firstrelem - 1;
1170 else if (gimme == G_SCALAR) {
1171 dTARGET;
1172 SP = firstrelem;
ca65944e 1173 SETi(lastrelem - firstrelem + 1 - duplicates);
54310121
PP
1174 }
1175 else {
ca65944e 1176 if (ary)
a0d0e21e 1177 SP = lastrelem;
ca65944e
RGS
1178 else if (hash) {
1179 if (duplicates) {
1180 /* Removes from the stack the entries which ended up as
1181 * duplicated keys in the hash (fix for [perl #24380]) */
1182 Move(firsthashrelem + duplicates,
1183 firsthashrelem, duplicates, SV**);
1184 lastrelem -= duplicates;
1185 }
1186 SP = lastrelem;
1187 }
a0d0e21e
LW
1188 else
1189 SP = firstrelem + (lastlelem - firstlelem);
0c8c7a05 1190 lelem = firstlelem + (relem - firstrelem);
5f05dabc 1191 while (relem <= SP)
3280af22 1192 *relem++ = (lelem <= lastlelem) ? *lelem++ : &PL_sv_undef;
a0d0e21e 1193 }
08aeb9f7 1194
54310121 1195 RETURN;
a0d0e21e
LW
1196}
1197
8782bef2
GB
1198PP(pp_qr)
1199{
97aff369 1200 dVAR; dSP;
c4420975 1201 register PMOP * const pm = cPMOP;
fe578d7f 1202 REGEXP * rx = PM_GETRE(pm);
10599a69 1203 SV * const pkg = rx ? CALLREG_PACKAGE(rx) : NULL;
c4420975 1204 SV * const rv = sv_newmortal();
288b8c02
NC
1205
1206 SvUPGRADE(rv, SVt_IV);
1207 /* This RV is about to own a reference to the regexp. (In addition to the
1208 reference already owned by the PMOP. */
1209 ReREFCNT_inc(rx);
d2f13c59 1210 SvRV_set(rv, (SV*) rx);
288b8c02
NC
1211 SvROK_on(rv);
1212
1213 if (pkg) {
1214 HV* const stash = gv_stashpv(SvPV_nolen(pkg), GV_ADD);
1215 (void)sv_bless(rv, stash);
1216 }
1217
07bc277f 1218 if (RX_EXTFLAGS(rx) & RXf_TAINTED)
e08e52cf 1219 SvTAINTED_on(rv);
c8c13c22 1220 XPUSHs(rv);
1221 RETURN;
8782bef2
GB
1222}
1223
a0d0e21e
LW
1224PP(pp_match)
1225{
97aff369 1226 dVAR; dSP; dTARG;
a0d0e21e 1227 register PMOP *pm = cPMOP;
d65afb4b 1228 PMOP *dynpm = pm;
0d46e09a
SP
1229 register const char *t;
1230 register const char *s;
5c144d81 1231 const char *strend;
a0d0e21e 1232 I32 global;
1ed74d04 1233 U8 r_flags = REXEC_CHECKED;
5c144d81 1234 const char *truebase; /* Start of string */
aaa362c4 1235 register REGEXP *rx = PM_GETRE(pm);
b3eb6a9b 1236 bool rxtainted;
a3b680e6 1237 const I32 gimme = GIMME;
a0d0e21e 1238 STRLEN len;
748a9306 1239 I32 minmatch = 0;
a3b680e6 1240 const I32 oldsave = PL_savestack_ix;
f86702cc 1241 I32 update_minmatch = 1;
e60df1fa 1242 I32 had_zerolen = 0;
58e23c8d 1243 U32 gpos = 0;
a0d0e21e 1244
533c011a 1245 if (PL_op->op_flags & OPf_STACKED)
a0d0e21e 1246 TARG = POPs;
59f00321
RGS
1247 else if (PL_op->op_private & OPpTARGET_MY)
1248 GETTARGET;
a0d0e21e 1249 else {
54b9620d 1250 TARG = DEFSV;
a0d0e21e
LW
1251 EXTEND(SP,1);
1252 }
d9f424b2 1253
c277df42 1254 PUTBACK; /* EVAL blocks need stack_sp. */
5c144d81 1255 s = SvPV_const(TARG, len);
a0d0e21e 1256 if (!s)
2269b42e 1257 DIE(aTHX_ "panic: pp_match");
890ce7af 1258 strend = s + len;
07bc277f 1259 rxtainted = ((RX_EXTFLAGS(rx) & RXf_TAINTED) ||
3280af22 1260 (PL_tainted && (pm->op_pmflags & PMf_RETAINT)));
9212bbba 1261 TAINT_NOT;
a0d0e21e 1262
a30b2f1f 1263 RX_MATCH_UTF8_set(rx, DO_UTF8(TARG));
d9f424b2 1264
d65afb4b 1265 /* PMdf_USED is set after a ?? matches once */
c737faaf
YO
1266 if (
1267#ifdef USE_ITHREADS
1268 SvREADONLY(PL_regex_pad[pm->op_pmoffset])
1269#else
1270 pm->op_pmflags & PMf_USED
1271#endif
1272 ) {
c277df42 1273 failure:
a0d0e21e
LW
1274 if (gimme == G_ARRAY)
1275 RETURN;
1276 RETPUSHNO;
1277 }
1278
c737faaf
YO
1279
1280
d65afb4b 1281 /* empty pattern special-cased to use last successful pattern if possible */
220fc49f 1282 if (!RX_PRELEN(rx) && PL_curpm) {
3280af22 1283 pm = PL_curpm;
aaa362c4 1284 rx = PM_GETRE(pm);
a0d0e21e 1285 }
d65afb4b 1286
07bc277f 1287 if (RX_MINLEN(rx) > (I32)len)
d65afb4b 1288 goto failure;
c277df42 1289
a0d0e21e 1290 truebase = t = s;
ad94a511
IZ
1291
1292 /* XXXX What part of this is needed with true \G-support? */
d65afb4b 1293 if ((global = dynpm->op_pmflags & PMf_GLOBAL)) {
07bc277f 1294 RX_OFFS(rx)[0].start = -1;
a0d0e21e 1295 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
c445ea15 1296 MAGIC* const mg = mg_find(TARG, PERL_MAGIC_regex_global);
565764a8 1297 if (mg && mg->mg_len >= 0) {
07bc277f
NC
1298 if (!(RX_EXTFLAGS(rx) & RXf_GPOS_SEEN))
1299 RX_OFFS(rx)[0].end = RX_OFFS(rx)[0].start = mg->mg_len;
1300 else if (RX_EXTFLAGS(rx) & RXf_ANCH_GPOS) {
0ef3e39e 1301 r_flags |= REXEC_IGNOREPOS;
07bc277f
NC
1302 RX_OFFS(rx)[0].end = RX_OFFS(rx)[0].start = mg->mg_len;
1303 } else if (RX_EXTFLAGS(rx) & RXf_GPOS_FLOAT)
58e23c8d
YO
1304 gpos = mg->mg_len;
1305 else
07bc277f
NC
1306 RX_OFFS(rx)[0].end = RX_OFFS(rx)[0].start = mg->mg_len;
1307 minmatch = (mg->mg_flags & MGf_MINMATCH) ? RX_GOFS(rx) + 1 : 0;
f86702cc 1308 update_minmatch = 0;
748a9306 1309 }
a0d0e21e
LW
1310 }
1311 }
a229a030 1312 /* XXX: comment out !global get safe $1 vars after a
62e7980d 1313 match, BUT be aware that this leads to dramatic slowdowns on
a229a030
YO
1314 /g matches against large strings. So far a solution to this problem
1315 appears to be quite tricky.
1316 Test for the unsafe vars are TODO for now. */
07bc277f 1317 if (( !global && RX_NPARENS(rx))
cde0cee5 1318 || SvTEMP(TARG) || PL_sawampersand ||
07bc277f 1319 (RX_EXTFLAGS(rx) & (RXf_EVAL_SEEN|RXf_PMf_KEEPCOPY)))
14977893 1320 r_flags |= REXEC_COPY_STR;
1c846c1f 1321 if (SvSCREAM(TARG))
22e551b9
IZ
1322 r_flags |= REXEC_SCREAM;
1323
a0d0e21e 1324play_it_again:
07bc277f
NC
1325 if (global && RX_OFFS(rx)[0].start != -1) {
1326 t = s = RX_OFFS(rx)[0].end + truebase - RX_GOFS(rx);
1327 if ((s + RX_MINLEN(rx)) > strend || s < truebase)
a0d0e21e 1328 goto nope;
f86702cc 1329 if (update_minmatch++)
e60df1fa 1330 minmatch = had_zerolen;
a0d0e21e 1331 }
07bc277f 1332 if (RX_EXTFLAGS(rx) & RXf_USE_INTUIT &&
3c8556c3 1333 DO_UTF8(TARG) == (RX_UTF8(rx) != 0)) {
5c144d81
NC
1334 /* FIXME - can PL_bostr be made const char *? */
1335 PL_bostr = (char *)truebase;
f9f4320a 1336 s = CALLREG_INTUIT_START(rx, TARG, (char *)s, (char *)strend, r_flags, NULL);
f722798b
IZ
1337
1338 if (!s)
1339 goto nope;
07bc277f 1340 if ( (RX_EXTFLAGS(rx) & RXf_CHECK_ALL)
14977893 1341 && !PL_sawampersand
07bc277f
NC
1342 && !(RX_EXTFLAGS(rx) & RXf_PMf_KEEPCOPY)
1343 && ((RX_EXTFLAGS(rx) & RXf_NOSCAN)
1344 || !((RX_EXTFLAGS(rx) & RXf_INTUIT_TAIL)
05b4157f
GS
1345 && (r_flags & REXEC_SCREAM)))
1346 && !SvROK(TARG)) /* Cannot trust since INTUIT cannot guess ^ */
f722798b 1347 goto yup;
a0d0e21e 1348 }
1f36f092
RB
1349 if (CALLREGEXEC(rx, (char*)s, (char *)strend, (char*)truebase,
1350 minmatch, TARG, NUM2PTR(void*, gpos), r_flags))
bbce6d69 1351 {
3280af22 1352 PL_curpm = pm;
c737faaf
YO
1353 if (dynpm->op_pmflags & PMf_ONCE) {
1354#ifdef USE_ITHREADS
1355 SvREADONLY_on(PL_regex_pad[dynpm->op_pmoffset]);
1356#else
1357 dynpm->op_pmflags |= PMf_USED;
1358#endif
1359 }
a0d0e21e
LW
1360 goto gotcha;
1361 }
1362 else
1363 goto ret_no;
1364 /*NOTREACHED*/
1365
1366 gotcha:
72311751
GS
1367 if (rxtainted)
1368 RX_MATCH_TAINTED_on(rx);
1369 TAINT_IF(RX_MATCH_TAINTED(rx));
a0d0e21e 1370 if (gimme == G_ARRAY) {
07bc277f 1371 const I32 nparens = RX_NPARENS(rx);
a3b680e6 1372 I32 i = (global && !nparens) ? 1 : 0;
a0d0e21e 1373
c277df42 1374 SPAGAIN; /* EVAL blocks could move the stack. */
ffc61ed2
JH
1375 EXTEND(SP, nparens + i);
1376 EXTEND_MORTAL(nparens + i);
1377 for (i = !i; i <= nparens; i++) {
a0d0e21e 1378 PUSHs(sv_newmortal());
07bc277f
NC
1379 if ((RX_OFFS(rx)[i].start != -1) && RX_OFFS(rx)[i].end != -1 ) {
1380 const I32 len = RX_OFFS(rx)[i].end - RX_OFFS(rx)[i].start;
1381 s = RX_OFFS(rx)[i].start + truebase;
1382 if (RX_OFFS(rx)[i].end < 0 || RX_OFFS(rx)[i].start < 0 ||
290deeac
A
1383 len < 0 || len > strend - s)
1384 DIE(aTHX_ "panic: pp_match start/end pointers");
a0d0e21e 1385 sv_setpvn(*SP, s, len);
cce850e4 1386 if (DO_UTF8(TARG) && is_utf8_string((U8*)s, len))
a197cbdd 1387 SvUTF8_on(*SP);
a0d0e21e
LW
1388 }
1389 }
1390 if (global) {
d65afb4b 1391 if (dynpm->op_pmflags & PMf_CONTINUE) {
6136c704 1392 MAGIC* mg = NULL;
0af80b60
HS
1393 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG))
1394 mg = mg_find(TARG, PERL_MAGIC_regex_global);
1395 if (!mg) {
d83f0a82
NC
1396#ifdef PERL_OLD_COPY_ON_WRITE
1397 if (SvIsCOW(TARG))
1398 sv_force_normal_flags(TARG, 0);
1399#endif
1400 mg = sv_magicext(TARG, NULL, PERL_MAGIC_regex_global,
1401 &PL_vtbl_mglob, NULL, 0);
0af80b60 1402 }
07bc277f
NC
1403 if (RX_OFFS(rx)[0].start != -1) {
1404 mg->mg_len = RX_OFFS(rx)[0].end;
1405 if (RX_OFFS(rx)[0].start + RX_GOFS(rx) == (UV)RX_OFFS(rx)[0].end)
0af80b60
HS
1406 mg->mg_flags |= MGf_MINMATCH;
1407 else
1408 mg->mg_flags &= ~MGf_MINMATCH;
1409 }
1410 }
07bc277f
NC
1411 had_zerolen = (RX_OFFS(rx)[0].start != -1
1412 && (RX_OFFS(rx)[0].start + RX_GOFS(rx)
1413 == (UV)RX_OFFS(rx)[0].end));
c277df42 1414 PUTBACK; /* EVAL blocks may use stack */
cf93c79d 1415 r_flags |= REXEC_IGNOREPOS | REXEC_NOT_FIRST;
a0d0e21e
LW
1416 goto play_it_again;
1417 }
ffc61ed2 1418 else if (!nparens)
bde848c5 1419 XPUSHs(&PL_sv_yes);
4633a7c4 1420 LEAVE_SCOPE(oldsave);
a0d0e21e
LW
1421 RETURN;
1422 }
1423 else {
1424 if (global) {
cbbf8932 1425 MAGIC* mg;
a0d0e21e 1426 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG))
14befaf4 1427 mg = mg_find(TARG, PERL_MAGIC_regex_global);
cbbf8932
AL
1428 else
1429 mg = NULL;
a0d0e21e 1430 if (!mg) {
d83f0a82
NC
1431#ifdef PERL_OLD_COPY_ON_WRITE
1432 if (SvIsCOW(TARG))
1433 sv_force_normal_flags(TARG, 0);
1434#endif
1435 mg = sv_magicext(TARG, NULL, PERL_MAGIC_regex_global,
1436 &PL_vtbl_mglob, NULL, 0);
a0d0e21e 1437 }
07bc277f
NC
1438 if (RX_OFFS(rx)[0].start != -1) {
1439 mg->mg_len = RX_OFFS(rx)[0].end;
1440 if (RX_OFFS(rx)[0].start + RX_GOFS(rx) == (UV)RX_OFFS(rx)[0].end)
748a9306
LW
1441 mg->mg_flags |= MGf_MINMATCH;
1442 else
1443 mg->mg_flags &= ~MGf_MINMATCH;
1444 }
a0d0e21e 1445 }
4633a7c4 1446 LEAVE_SCOPE(oldsave);
a0d0e21e
LW
1447 RETPUSHYES;
1448 }
1449
f722798b 1450yup: /* Confirmed by INTUIT */
72311751
GS
1451 if (rxtainted)
1452 RX_MATCH_TAINTED_on(rx);
1453 TAINT_IF(RX_MATCH_TAINTED(rx));
3280af22 1454 PL_curpm = pm;
c737faaf
YO
1455 if (dynpm->op_pmflags & PMf_ONCE) {
1456#ifdef USE_ITHREADS
1457 SvREADONLY_on(PL_regex_pad[dynpm->op_pmoffset]);
1458#else
1459 dynpm->op_pmflags |= PMf_USED;
1460#endif
1461 }
cf93c79d 1462 if (RX_MATCH_COPIED(rx))
07bc277f 1463 Safefree(RX_SUBBEG(rx));
cf93c79d 1464 RX_MATCH_COPIED_off(rx);
07bc277f 1465 RX_SUBBEG(rx) = NULL;
a0d0e21e 1466 if (global) {
5c144d81 1467 /* FIXME - should rx->subbeg be const char *? */
07bc277f
NC
1468 RX_SUBBEG(rx) = (char *) truebase;
1469 RX_OFFS(rx)[0].start = s - truebase;
a30b2f1f 1470 if (RX_MATCH_UTF8(rx)) {
07bc277f
NC
1471 char * const t = (char*)utf8_hop((U8*)s, RX_MINLENRET(rx));
1472 RX_OFFS(rx)[0].end = t - truebase;
60aeb6fd
NIS
1473 }
1474 else {
07bc277f 1475 RX_OFFS(rx)[0].end = s - truebase + RX_MINLENRET(rx);
60aeb6fd 1476 }
07bc277f 1477 RX_SUBLEN(rx) = strend - truebase;
a0d0e21e 1478 goto gotcha;
1c846c1f 1479 }
07bc277f 1480 if (PL_sawampersand || RX_EXTFLAGS(rx) & RXf_PMf_KEEPCOPY) {
14977893 1481 I32 off;
f8c7b90f 1482#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
1483 if (SvIsCOW(TARG) || (SvFLAGS(TARG) & CAN_COW_MASK) == CAN_COW_FLAGS) {
1484 if (DEBUG_C_TEST) {
1485 PerlIO_printf(Perl_debug_log,
1486 "Copy on write: pp_match $& capture, type %d, truebase=%p, t=%p, difference %d\n",
6c9570dc 1487 (int) SvTYPE(TARG), (void*)truebase, (void*)t,
ed252734
NC
1488 (int)(t-truebase));
1489 }
bdd9a1b1
NC
1490 RX_SAVED_COPY(rx) = sv_setsv_cow(RX_SAVED_COPY(rx), TARG);
1491 RX_SUBBEG(rx)
1492 = (char *) SvPVX_const(RX_SAVED_COPY(rx)) + (t - truebase);
1493 assert (SvPOKp(RX_SAVED_COPY(rx)));
ed252734
NC
1494 } else
1495#endif
1496 {
14977893 1497
07bc277f 1498 RX_SUBBEG(rx) = savepvn(t, strend - t);
f8c7b90f 1499#ifdef PERL_OLD_COPY_ON_WRITE
bdd9a1b1 1500 RX_SAVED_COPY(rx) = NULL;
ed252734
NC
1501#endif
1502 }
07bc277f 1503 RX_SUBLEN(rx) = strend - t;
14977893 1504 RX_MATCH_COPIED_on(rx);
07bc277f
NC
1505 off = RX_OFFS(rx)[0].start = s - t;
1506 RX_OFFS(rx)[0].end = off + RX_MINLENRET(rx);
14977893
JH
1507 }
1508 else { /* startp/endp are used by @- @+. */
07bc277f
NC
1509 RX_OFFS(rx)[0].start = s - truebase;
1510 RX_OFFS(rx)[0].end = s - truebase + RX_MINLENRET(rx);
14977893 1511 }
07bc277f 1512 /* including RX_NPARENS(rx) in the below code seems highly suspicious.
cde0cee5 1513 -dmq */
07bc277f 1514 RX_NPARENS(rx) = RX_LASTPAREN(rx) = RX_LASTCLOSEPAREN(rx) = 0; /* used by @-, @+, and $^N */
4633a7c4 1515 LEAVE_SCOPE(oldsave);
a0d0e21e
LW
1516 RETPUSHYES;
1517
1518nope:
a0d0e21e 1519ret_no:
d65afb4b 1520 if (global && !(dynpm->op_pmflags & PMf_CONTINUE)) {
a0d0e21e 1521 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
6136c704 1522 MAGIC* const mg = mg_find(TARG, PERL_MAGIC_regex_global);
a0d0e21e 1523 if (mg)
565764a8 1524 mg->mg_len = -1;
a0d0e21e
LW
1525 }
1526 }
4633a7c4 1527 LEAVE_SCOPE(oldsave);
a0d0e21e
LW
1528 if (gimme == G_ARRAY)
1529 RETURN;
1530 RETPUSHNO;
1531}
1532
1533OP *
864dbfa3 1534Perl_do_readline(pTHX)
a0d0e21e 1535{
27da23d5 1536 dVAR; dSP; dTARGETSTACKED;
a0d0e21e
LW
1537 register SV *sv;
1538 STRLEN tmplen = 0;
1539 STRLEN offset;
760ac839 1540 PerlIO *fp;
a3b680e6
AL
1541 register IO * const io = GvIO(PL_last_in_gv);
1542 register const I32 type = PL_op->op_type;
1543 const I32 gimme = GIMME_V;
a0d0e21e 1544
6136c704
AL
1545 if (io) {
1546 MAGIC * const mg = SvTIED_mg((SV*)io, PERL_MAGIC_tiedscalar);
1547 if (mg) {
1548 PUSHMARK(SP);
1549 XPUSHs(SvTIED_obj((SV*)io, mg));
1550 PUTBACK;
1551 ENTER;
1552 call_method("READLINE", gimme);
1553 LEAVE;
1554 SPAGAIN;
1555 if (gimme == G_SCALAR) {
1556 SV* const result = POPs;
1557 SvSetSV_nosteal(TARG, result);
1558 PUSHTARG;
1559 }
1560 RETURN;
0b7c7b4f 1561 }
e79b0511 1562 }
4608196e 1563 fp = NULL;
a0d0e21e
LW
1564 if (io) {
1565 fp = IoIFP(io);
1566 if (!fp) {
1567 if (IoFLAGS(io) & IOf_ARGV) {
1568 if (IoFLAGS(io) & IOf_START) {
a0d0e21e 1569 IoLINES(io) = 0;
3280af22 1570 if (av_len(GvAVn(PL_last_in_gv)) < 0) {
1d7c1841 1571 IoFLAGS(io) &= ~IOf_START;
4608196e 1572 do_open(PL_last_in_gv,"-",1,FALSE,O_RDONLY,0,NULL);
c69033f2 1573 sv_setpvn(GvSVn(PL_last_in_gv), "-", 1);
3280af22 1574 SvSETMAGIC(GvSV(PL_last_in_gv));
a2008d6d
GS
1575 fp = IoIFP(io);
1576 goto have_fp;
a0d0e21e
LW
1577 }
1578 }
3280af22 1579 fp = nextargv(PL_last_in_gv);
a0d0e21e 1580 if (!fp) { /* Note: fp != IoIFP(io) */
3280af22 1581 (void)do_close(PL_last_in_gv, FALSE); /* now it does*/
a0d0e21e
LW
1582 }
1583 }
0d44d22b
NC
1584 else if (type == OP_GLOB)
1585 fp = Perl_start_glob(aTHX_ POPs, io);
a0d0e21e
LW
1586 }
1587 else if (type == OP_GLOB)
1588 SP--;
a00b5bd3 1589 else if (ckWARN(WARN_IO) && IoTYPE(io) == IoTYPE_WRONLY) {
4c80c0b2 1590 report_evil_fh(PL_last_in_gv, io, OP_phoney_OUTPUT_ONLY);
a00b5bd3 1591 }
a0d0e21e
LW
1592 }
1593 if (!fp) {
041457d9
DM
1594 if ((!io || !(IoFLAGS(io) & IOf_START))
1595 && ckWARN2(WARN_GLOB, WARN_CLOSED))
1596 {
3f4520fe 1597 if (type == OP_GLOB)
9014280d 1598 Perl_warner(aTHX_ packWARN(WARN_GLOB),
af8c498a
GS
1599 "glob failed (can't start child: %s)",
1600 Strerror(errno));
69282e91 1601 else
bc37a18f 1602 report_evil_fh(PL_last_in_gv, io, PL_op->op_type);
3f4520fe 1603 }
54310121 1604 if (gimme == G_SCALAR) {
79628082 1605 /* undef TARG, and push that undefined value */
ba92458f
AE
1606 if (type != OP_RCATLINE) {
1607 SV_CHECK_THINKFIRST_COW_DROP(TARG);
0c34ef67 1608 SvOK_off(TARG);
ba92458f 1609 }
a0d0e21e
LW
1610 PUSHTARG;
1611 }
1612 RETURN;
1613 }
a2008d6d 1614 have_fp:
54310121 1615 if (gimme == G_SCALAR) {
a0d0e21e 1616 sv = TARG;
0f722b55
RGS
1617 if (type == OP_RCATLINE && SvGMAGICAL(sv))
1618 mg_get(sv);
48de12d9
RGS
1619 if (SvROK(sv)) {
1620 if (type == OP_RCATLINE)
1621 SvPV_force_nolen(sv);
1622 else
1623 sv_unref(sv);
1624 }
f7877b28
NC
1625 else if (isGV_with_GP(sv)) {
1626 SvPV_force_nolen(sv);
1627 }
862a34c6 1628 SvUPGRADE(sv, SVt_PV);
a0d0e21e 1629 tmplen = SvLEN(sv); /* remember if already alloced */
bc44a8a2 1630 if (!tmplen && !SvREADONLY(sv))
a0d0e21e 1631 Sv_Grow(sv, 80); /* try short-buffering it */
2b5e58c4
AMS
1632 offset = 0;
1633 if (type == OP_RCATLINE && SvOK(sv)) {
1634 if (!SvPOK(sv)) {
8b6b16e7 1635 SvPV_force_nolen(sv);
2b5e58c4 1636 }
a0d0e21e 1637 offset = SvCUR(sv);
2b5e58c4 1638 }
a0d0e21e 1639 }
54310121 1640 else {
561b68a9 1641 sv = sv_2mortal(newSV(80));
54310121
PP
1642 offset = 0;
1643 }
fbad3eb5 1644
3887d568
AP
1645 /* This should not be marked tainted if the fp is marked clean */
1646#define MAYBE_TAINT_LINE(io, sv) \
1647 if (!(IoFLAGS(io) & IOf_UNTAINT)) { \
1648 TAINT; \
1649 SvTAINTED_on(sv); \
1650 }
1651
684bef36 1652/* delay EOF state for a snarfed empty file */
fbad3eb5 1653#define SNARF_EOF(gimme,rs,io,sv) \
684bef36 1654 (gimme != G_SCALAR || SvCUR(sv) \
b9fee9ba 1655 || (IoFLAGS(io) & IOf_NOLINE) || !RsSNARF(rs))
fbad3eb5 1656
a0d0e21e 1657 for (;;) {
09e8efcc 1658 PUTBACK;
fbad3eb5 1659 if (!sv_gets(sv, fp, offset)
2d726892
TF
1660 && (type == OP_GLOB
1661 || SNARF_EOF(gimme, PL_rs, io, sv)
1662 || PerlIO_error(fp)))
fbad3eb5 1663 {
760ac839 1664 PerlIO_clearerr(fp);
a0d0e21e 1665 if (IoFLAGS(io) & IOf_ARGV) {
3280af22 1666 fp = nextargv(PL_last_in_gv);
a0d0e21e
LW
1667 if (fp)
1668 continue;
3280af22 1669 (void)do_close(PL_last_in_gv, FALSE);
a0d0e21e
LW
1670 }
1671 else if (type == OP_GLOB) {
e476b1b5 1672 if (!do_close(PL_last_in_gv, FALSE) && ckWARN(WARN_GLOB)) {
9014280d 1673 Perl_warner(aTHX_ packWARN(WARN_GLOB),
4eb79ab5 1674 "glob failed (child exited with status %d%s)",
894356b3 1675 (int)(STATUS_CURRENT >> 8),
cf494569 1676 (STATUS_CURRENT & 0x80) ? ", core dumped" : "");
4eb79ab5 1677 }
a0d0e21e 1678 }
54310121 1679 if (gimme == G_SCALAR) {
ba92458f
AE
1680 if (type != OP_RCATLINE) {
1681 SV_CHECK_THINKFIRST_COW_DROP(TARG);
0c34ef67 1682 SvOK_off(TARG);
ba92458f 1683 }
09e8efcc 1684 SPAGAIN;
a0d0e21e
LW
1685 PUSHTARG;
1686 }
3887d568 1687 MAYBE_TAINT_LINE(io, sv);
a0d0e21e
LW
1688 RETURN;
1689 }
3887d568 1690 MAYBE_TAINT_LINE(io, sv);
a0d0e21e 1691 IoLINES(io)++;
b9fee9ba 1692 IoFLAGS(io) |= IOf_NOLINE;
71be2cbc 1693 SvSETMAGIC(sv);
09e8efcc 1694 SPAGAIN;
a0d0e21e 1695 XPUSHs(sv);
a0d0e21e 1696 if (type == OP_GLOB) {
349d4f2f 1697 const char *t1;
a0d0e21e 1698
3280af22 1699 if (SvCUR(sv) > 0 && SvCUR(PL_rs) > 0) {
6136c704 1700 char * const tmps = SvEND(sv) - 1;
aa07b2f6 1701 if (*tmps == *SvPVX_const(PL_rs)) {
c07a80fd 1702 *tmps = '\0';
b162af07 1703 SvCUR_set(sv, SvCUR(sv) - 1);
c07a80fd
PP
1704 }
1705 }
349d4f2f
NC
1706 for (t1 = SvPVX_const(sv); *t1; t1++)
1707 if (!isALPHA(*t1) && !isDIGIT(*t1) &&
1708 strchr("$&*(){}[]'\";\\|?<>~`", *t1))
a0d0e21e 1709 break;
349d4f2f 1710 if (*t1 && PerlLIO_lstat(SvPVX_const(sv), &PL_statbuf) < 0) {
a0d0e21e
LW
1711 (void)POPs; /* Unmatched wildcard? Chuck it... */
1712 continue;
1713 }
2d79bf7f 1714 } else if (SvUTF8(sv)) { /* OP_READLINE, OP_RCATLINE */
d4c19fe8
AL
1715 if (ckWARN(WARN_UTF8)) {
1716 const U8 * const s = (const U8*)SvPVX_const(sv) + offset;
1717 const STRLEN len = SvCUR(sv) - offset;
1718 const U8 *f;
1719
1720 if (!is_utf8_string_loc(s, len, &f))
1721 /* Emulate :encoding(utf8) warning in the same case. */
1722 Perl_warner(aTHX_ packWARN(WARN_UTF8),
1723 "utf8 \"\\x%02X\" does not map to Unicode",
1724 f < (U8*)SvEND(sv) ? *f : 0);
1725 }
a0d0e21e 1726 }
54310121 1727 if (gimme == G_ARRAY) {
a0d0e21e 1728 if (SvLEN(sv) - SvCUR(sv) > 20) {
1da4ca5f 1729 SvPV_shrink_to_cur(sv);
a0d0e21e 1730 }
561b68a9 1731 sv = sv_2mortal(newSV(80));
a0d0e21e
LW
1732 continue;
1733 }
54310121 1734 else if (gimme == G_SCALAR && !tmplen && SvLEN(sv) - SvCUR(sv) > 80) {
a0d0e21e 1735 /* try to reclaim a bit of scalar space (only on 1st alloc) */
d5b5861b
NC
1736 const STRLEN new_len
1737 = SvCUR(sv) < 60 ? 80 : SvCUR(sv)+40; /* allow some slop */
1da4ca5f 1738 SvPV_renew(sv, new_len);
a0d0e21e
LW
1739 }
1740 RETURN;
1741 }
1742}
1743
1744PP(pp_enter)
1745{
27da23d5 1746 dVAR; dSP;
c09156bb 1747 register PERL_CONTEXT *cx;
533c011a 1748 I32 gimme = OP_GIMME(PL_op, -1);
a0d0e21e 1749
54310121
PP
1750 if (gimme == -1) {
1751 if (cxstack_ix >= 0)
1752 gimme = cxstack[cxstack_ix].blk_gimme;
1753 else
1754 gimme = G_SCALAR;
1755 }
a0d0e21e
LW
1756
1757 ENTER;
1758
1759 SAVETMPS;
924508f0 1760 PUSHBLOCK(cx, CXt_BLOCK, SP);
a0d0e21e
LW
1761
1762 RETURN;
1763}
1764
1765PP(pp_helem)
1766{
97aff369 1767 dVAR; dSP;
760ac839 1768 HE* he;
ae77835f 1769 SV **svp;
c445ea15
AL
1770 SV * const keysv = POPs;
1771 HV * const hv = (HV*)POPs;
a3b680e6
AL
1772 const U32 lval = PL_op->op_flags & OPf_MOD || LVRET;
1773 const U32 defer = PL_op->op_private & OPpLVAL_DEFER;
be6c24e0 1774 SV *sv;
c158a4fd 1775 const U32 hash = (SvIsCOW_shared_hash(keysv)) ? SvSHARED_HASH(keysv) : 0;
9c5ffd7c 1776 I32 preeminent = 0;
a0d0e21e 1777
d4c19fe8 1778 if (SvTYPE(hv) != SVt_PVHV)
a0d0e21e 1779 RETPUSHUNDEF;
d4c19fe8
AL
1780
1781 if (PL_op->op_private & OPpLVAL_INTRO) {
1782 MAGIC *mg;
1783 HV *stash;
1784 /* does the element we're localizing already exist? */
1785 preeminent = /* can we determine whether it exists? */
1786 ( !SvRMAGICAL(hv)
1787 || mg_find((SV*)hv, PERL_MAGIC_env)
1788 || ( (mg = mg_find((SV*)hv, PERL_MAGIC_tied))
1789 /* Try to preserve the existenceness of a tied hash
1790 * element by using EXISTS and DELETE if possible.
1791 * Fallback to FETCH and STORE otherwise */
1792 && (stash = SvSTASH(SvRV(SvTIED_obj((SV*)hv, mg))))
1793 && gv_fetchmethod_autoload(stash, "EXISTS", TRUE)
1794 && gv_fetchmethod_autoload(stash, "DELETE", TRUE)
1795 )
1796 ) ? hv_exists_ent(hv, keysv, 0) : 1;
1797 }
1798 he = hv_fetch_ent(hv, keysv, lval && !defer, hash);
1799 svp = he ? &HeVAL(he) : NULL;
a0d0e21e 1800 if (lval) {
3280af22 1801 if (!svp || *svp == &PL_sv_undef) {
68dc0745
PP
1802 SV* lv;
1803 SV* key2;
2d8e6c8d 1804 if (!defer) {
be2597df 1805 DIE(aTHX_ PL_no_helem_sv, SVfARG(keysv));
2d8e6c8d 1806 }
68dc0745
PP
1807 lv = sv_newmortal();
1808 sv_upgrade(lv, SVt_PVLV);
1809 LvTYPE(lv) = 'y';
6136c704 1810 sv_magic(lv, key2 = newSVsv(keysv), PERL_MAGIC_defelem, NULL, 0);
68dc0745 1811 SvREFCNT_dec(key2); /* sv_magic() increments refcount */
b37c2d43 1812 LvTARG(lv) = SvREFCNT_inc_simple(hv);
68dc0745
PP
1813 LvTARGLEN(lv) = 1;
1814 PUSHs(lv);
1815 RETURN;
1816 }
533c011a 1817 if (PL_op->op_private & OPpLVAL_INTRO) {
bfcb3514 1818 if (HvNAME_get(hv) && isGV(*svp))
533c011a 1819 save_gp((GV*)*svp, !(PL_op->op_flags & OPf_SPECIAL));
1f5346dc
SC
1820 else {
1821 if (!preeminent) {
1822 STRLEN keylen;
e62f0680 1823 const char * const key = SvPV_const(keysv, keylen);
7d654f43 1824 SAVEDELETE(hv, savepvn(key,keylen),
bb7a0f54 1825 SvUTF8(keysv) ? -(I32)keylen : (I32)keylen);
bfc4de9f 1826 } else
1f5346dc
SC
1827 save_helem(hv, keysv, svp);
1828 }
5f05dabc 1829 }
533c011a
NIS
1830 else if (PL_op->op_private & OPpDEREF)
1831 vivify_ref(*svp, PL_op->op_private & OPpDEREF);
a0d0e21e 1832 }
3280af22 1833 sv = (svp ? *svp : &PL_sv_undef);
be6c24e0
GS
1834 /* This makes C<local $tied{foo} = $tied{foo}> possible.
1835 * Pushing the magical RHS on to the stack is useless, since
1836 * that magic is soon destined to be misled by the local(),
1837 * and thus the later pp_sassign() will fail to mg_get() the
1838 * old value. This should also cure problems with delayed
1839 * mg_get()s. GSAR 98-07-03 */
1840 if (!lval && SvGMAGICAL(sv))
1841 sv = sv_mortalcopy(sv);
1842 PUSHs(sv);
a0d0e21e
LW
1843 RETURN;
1844}
1845
1846PP(pp_leave)
1847{
27da23d5 1848 dVAR; dSP;
c09156bb 1849 register PERL_CONTEXT *cx;
a0d0e21e
LW
1850 SV **newsp;
1851 PMOP *newpm;
1852 I32 gimme;
1853
533c011a 1854 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e 1855 cx = &cxstack[cxstack_ix];
3280af22 1856 cx->blk_oldpm = PL_curpm; /* fake block should preserve $1 et al */
a0d0e21e
LW
1857 }
1858
1859 POPBLOCK(cx,newpm);
1860
533c011a 1861 gimme = OP_GIMME(PL_op, -1);
54310121
PP
1862 if (gimme == -1) {
1863 if (cxstack_ix >= 0)
1864 gimme = cxstack[cxstack_ix].blk_gimme;
1865 else
1866 gimme = G_SCALAR;
1867 }
a0d0e21e 1868
a1f49e72 1869 TAINT_NOT;
54310121
PP
1870 if (gimme == G_VOID)
1871 SP = newsp;
1872 else if (gimme == G_SCALAR) {
a3b680e6 1873 register SV **mark;
54310121 1874 MARK = newsp + 1;
09256e2f 1875 if (MARK <= SP) {
54310121
PP
1876 if (SvFLAGS(TOPs) & (SVs_PADTMP|SVs_TEMP))
1877 *MARK = TOPs;
1878 else
1879 *MARK = sv_mortalcopy(TOPs);
09256e2f 1880 } else {
54310121 1881 MEXTEND(mark,0);
3280af22 1882 *MARK = &PL_sv_undef;
a0d0e21e 1883 }
54310121 1884 SP = MARK;
a0d0e21e 1885 }
54310121 1886 else if (gimme == G_ARRAY) {
a1f49e72 1887 /* in case LEAVE wipes old return values */
a3b680e6 1888 register SV **mark;
a1f49e72
CS
1889 for (mark = newsp + 1; mark <= SP; mark++) {
1890 if (!(SvFLAGS(*mark) & (SVs_PADTMP|SVs_TEMP))) {
a0d0e21e 1891 *mark = sv_mortalcopy(*mark);
a1f49e72
CS
1892 TAINT_NOT; /* Each item is independent */
1893 }
1894 }
a0d0e21e 1895 }
3280af22 1896 PL_curpm = newpm; /* Don't pop $1 et al till now */
a0d0e21e
LW
1897
1898 LEAVE;
1899
1900 RETURN;
1901}
1902
1903PP(pp_iter)
1904{
97aff369 1905 dVAR; dSP;
c09156bb 1906 register PERL_CONTEXT *cx;
dc09a129 1907 SV *sv, *oldsv;
1d7c1841 1908 SV **itersvp;
d01136d6
BS
1909 AV *av = NULL; /* used for LOOP_FOR on arrays and the stack */
1910 bool av_is_stack = FALSE;
a0d0e21e 1911
924508f0 1912 EXTEND(SP, 1);
a0d0e21e 1913 cx = &cxstack[cxstack_ix];
3b719c58 1914 if (!CxTYPE_is_LOOP(cx))
cea2e8a9 1915 DIE(aTHX_ "panic: pp_iter");
a0d0e21e 1916
1d7c1841 1917 itersvp = CxITERVAR(cx);
d01136d6 1918 if (CxTYPE(cx) == CXt_LOOP_LAZYSV) {
89ea2908 1919 /* string increment */
d01136d6
BS
1920 SV* cur = cx->blk_loop.state_u.lazysv.cur;
1921 SV *end = cx->blk_loop.state_u.lazysv.end;
267cc4a8
NC
1922 /* If the maximum is !SvOK(), pp_enteriter substitutes PL_sv_no.
1923 It has SvPVX of "" and SvCUR of 0, which is what we want. */
4fe3f0fa 1924 STRLEN maxlen = 0;
d01136d6 1925 const char *max = SvPV_const(end, maxlen);
89ea2908 1926 if (!SvNIOK(cur) && SvCUR(cur) <= maxlen) {
1d7c1841 1927 if (SvREFCNT(*itersvp) == 1 && !SvMAGICAL(*itersvp)) {
eaa5c2d6 1928 /* safe to reuse old SV */
1d7c1841 1929 sv_setsv(*itersvp, cur);
eaa5c2d6 1930 }
1c846c1f 1931 else
eaa5c2d6
GA
1932 {
1933 /* we need a fresh SV every time so that loop body sees a
1934 * completely new SV for closures/references to work as
1935 * they used to */
dc09a129 1936 oldsv = *itersvp;
1d7c1841 1937 *itersvp = newSVsv(cur);
dc09a129 1938 SvREFCNT_dec(oldsv);
eaa5c2d6 1939 }
aa07b2f6 1940 if (strEQ(SvPVX_const(cur), max))
89ea2908
GA
1941 sv_setiv(cur, 0); /* terminate next time */
1942 else
1943 sv_inc(cur);
1944 RETPUSHYES;
1945 }
1946 RETPUSHNO;
d01136d6
BS
1947 }
1948 else if (CxTYPE(cx) == CXt_LOOP_LAZYIV) {
89ea2908 1949 /* integer increment */
d01136d6 1950 if (cx->blk_loop.state_u.lazyiv.cur > cx->blk_loop.state_u.lazyiv.end)
89ea2908 1951 RETPUSHNO;
7f61b687 1952
3db8f154 1953 /* don't risk potential race */
1d7c1841 1954 if (SvREFCNT(*itersvp) == 1 && !SvMAGICAL(*itersvp)) {
eaa5c2d6 1955 /* safe to reuse old SV */
d01136d6 1956 sv_setiv(*itersvp, cx->blk_loop.state_u.lazyiv.cur++);
eaa5c2d6 1957 }
1c846c1f 1958 else
eaa5c2d6
GA
1959 {
1960 /* we need a fresh SV every time so that loop body sees a
1961 * completely new SV for closures/references to work as they
1962 * used to */
dc09a129 1963 oldsv = *itersvp;
d01136d6 1964 *itersvp = newSViv(cx->blk_loop.state_u.lazyiv.cur++);
dc09a129 1965 SvREFCNT_dec(oldsv);
eaa5c2d6 1966 }
a2309040
JH
1967
1968 /* Handle end of range at IV_MAX */
d01136d6
BS
1969 if ((cx->blk_loop.state_u.lazyiv.cur == IV_MIN) &&
1970 (cx->blk_loop.state_u.lazyiv.end == IV_MAX))
a2309040 1971 {
d01136d6
BS
1972 cx->blk_loop.state_u.lazyiv.cur++;
1973 cx->blk_loop.state_u.lazyiv.end++;
a2309040
JH
1974 }
1975
89ea2908
GA
1976 RETPUSHYES;
1977 }
1978
1979 /* iterate array */
d01136d6
BS
1980 assert(CxTYPE(cx) == CXt_LOOP_FOR);
1981 av = cx->blk_loop.state_u.ary.ary;
1982 if (!av) {
1983 av_is_stack = TRUE;
1984 av = PL_curstack;
1985 }
ef3e5ea9 1986 if (PL_op->op_private & OPpITER_REVERSED) {
d01136d6
BS
1987 if (cx->blk_loop.state_u.ary.ix <= (av_is_stack
1988 ? cx->blk_loop.resetsp + 1 : 0))
ef3e5ea9 1989 RETPUSHNO;
a0d0e21e 1990
ef3e5ea9 1991 if (SvMAGICAL(av) || AvREIFY(av)) {
d01136d6 1992 SV * const * const svp = av_fetch(av, --cx->blk_loop.state_u.ary.ix, FALSE);
a0714e2c 1993 sv = svp ? *svp : NULL;
ef3e5ea9
NC
1994 }
1995 else {
d01136d6 1996 sv = AvARRAY(av)[--cx->blk_loop.state_u.ary.ix];
ef3e5ea9 1997 }
d42935ef
JH
1998 }
1999 else {
d01136d6 2000 if (cx->blk_loop.state_u.ary.ix >= (av_is_stack ? cx->blk_oldsp :
ef3e5ea9
NC
2001 AvFILL(av)))
2002 RETPUSHNO;
2003
2004 if (SvMAGICAL(av) || AvREIFY(av)) {
d01136d6 2005 SV * const * const svp = av_fetch(av, ++cx->blk_loop.state_u.ary.ix, FALSE);
a0714e2c 2006 sv = svp ? *svp : NULL;
ef3e5ea9
NC
2007 }
2008 else {
d01136d6 2009 sv = AvARRAY(av)[++cx->blk_loop.state_u.ary.ix];
ef3e5ea9 2010 }
d42935ef 2011 }
ef3e5ea9 2012
0565a181 2013 if (sv && SvIS_FREED(sv)) {
a0714e2c 2014 *itersvp = NULL;
b6c83531 2015 Perl_croak(aTHX_ "Use of freed value in iteration");
cccede53
DM
2016 }
2017
d01136d6 2018 if (sv) {
a0d0e21e 2019 SvTEMP_off(sv);
d01136d6
BS
2020 SvREFCNT_inc_simple_void_NN(sv);
2021 }
a0d0e21e 2022 else
3280af22 2023 sv = &PL_sv_undef;
d01136d6
BS
2024 if (!av_is_stack && sv == &PL_sv_undef) {
2025 SV *lv = newSV_type(SVt_PVLV);
2026 LvTYPE(lv) = 'y';
2027 sv_magic(lv, NULL, PERL_MAGIC_defelem, NULL, 0);
b37c2d43 2028 LvTARG(lv) = SvREFCNT_inc_simple(av);
d01136d6 2029 LvTARGOFF(lv) = cx->blk_loop.state_u.ary.ix;
42718184 2030 LvTARGLEN(lv) = (STRLEN)UV_MAX;
d01136d6 2031 sv = lv;
5f05dabc 2032 }
a0d0e21e 2033
dc09a129 2034 oldsv = *itersvp;
d01136d6 2035 *itersvp = sv;
dc09a129
DM
2036 SvREFCNT_dec(oldsv);
2037
a0d0e21e
LW
2038 RETPUSHYES;
2039}
2040
2041PP(pp_subst)
2042{
97aff369 2043 dVAR; dSP; dTARG;
a0d0e21e
LW
2044 register PMOP *pm = cPMOP;
2045 PMOP *rpm = pm;
a0d0e21e
LW
2046 register char *s;
2047 char *strend;
2048 register char *m;
5c144d81 2049 const char *c;
a0d0e21e
LW
2050 register char *d;
2051 STRLEN clen;
2052 I32 iters = 0;
2053 I32 maxiters;
2054 register I32 i;
2055 bool once;
99710fe3 2056 U8 rxtainted;
a0d0e21e 2057 char *orig;
1ed74d04 2058 U8 r_flags;
aaa362c4 2059 register REGEXP *rx = PM_GETRE(pm);
a0d0e21e
LW
2060 STRLEN len;
2061 int force_on_match = 0;
0bcc34c2 2062 const I32 oldsave = PL_savestack_ix;
792b2c16 2063 STRLEN slen;
f272994b 2064 bool doutf8 = FALSE;
10300be4 2065 I32 matched;
f8c7b90f 2066#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
2067 bool is_cow;
2068#endif
a0714e2c 2069 SV *nsv = NULL;
a0d0e21e 2070
5cd24f17 2071 /* known replacement string? */
b37c2d43 2072 register SV *dstr = (pm->op_pmflags & PMf_CONST) ? POPs : NULL;
533c011a 2073 if (PL_op->op_flags & OPf_STACKED)
a0d0e21e 2074 TARG = POPs;
59f00321
RGS
2075 else if (PL_op->op_private & OPpTARGET_MY)
2076 GETTARGET;
a0d0e21e 2077 else {
54b9620d 2078 TARG = DEFSV;
a0d0e21e 2079 EXTEND(SP,1);
1c846c1f 2080 }
d9f424b2 2081
f8c7b90f 2082#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
2083 /* Awooga. Awooga. "bool" types that are actually char are dangerous,
2084 because they make integers such as 256 "false". */
2085 is_cow = SvIsCOW(TARG) ? TRUE : FALSE;
2086#else
765f542d
NC
2087 if (SvIsCOW(TARG))
2088 sv_force_normal_flags(TARG,0);
ed252734
NC
2089#endif
2090 if (
f8c7b90f 2091#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
2092 !is_cow &&
2093#endif
2094 (SvREADONLY(TARG)
cecf5685
NC
2095 || ( ((SvTYPE(TARG) == SVt_PVGV && isGV_with_GP(TARG))
2096 || SvTYPE(TARG) > SVt_PVLV)
4ce457a6 2097 && !(SvTYPE(TARG) == SVt_PVGV && SvFAKE(TARG)))))
d470f89e 2098 DIE(aTHX_ PL_no_modify);
8ec5e241
NIS
2099 PUTBACK;
2100
d5263905 2101 s = SvPV_mutable(TARG, len);
68dc0745 2102 if (!SvPOKp(TARG) || SvTYPE(TARG) == SVt_PVGV)
a0d0e21e 2103 force_on_match = 1;
07bc277f 2104 rxtainted = ((RX_EXTFLAGS(rx) & RXf_TAINTED) ||
3280af22
NIS
2105 (PL_tainted && (pm->op_pmflags & PMf_RETAINT)));
2106 if (PL_tainted)
b3eb6a9b 2107 rxtainted |= 2;
9212bbba 2108 TAINT_NOT;
a12c0f56 2109
a30b2f1f 2110 RX_MATCH_UTF8_set(rx, DO_UTF8(TARG));
d9f424b2 2111
a0d0e21e
LW
2112 force_it:
2113 if (!pm || !s)
2269b42e 2114 DIE(aTHX_ "panic: pp_subst");
a0d0e21e
LW
2115
2116 strend = s + len;
a30b2f1f 2117 slen = RX_MATCH_UTF8(rx) ? utf8_length((U8*)s, (U8*)strend) : len;
792b2c16
JH
2118 maxiters = 2 * slen + 10; /* We can match twice at each
2119 position, once with zero-length,
2120 second time with non-zero. */
a0d0e21e 2121
220fc49f 2122 if (!RX_PRELEN(rx) && PL_curpm) {
3280af22 2123 pm = PL_curpm;
aaa362c4 2124 rx = PM_GETRE(pm);
a0d0e21e 2125 }
07bc277f
NC
2126 r_flags = (RX_NPARENS(rx) || SvTEMP(TARG) || PL_sawampersand
2127 || (RX_EXTFLAGS(rx) & (RXf_EVAL_SEEN|RXf_PMf_KEEPCOPY)) )
ed252734 2128 ? REXEC_COPY_STR : 0;
f722798b 2129 if (SvSCREAM(TARG))
22e551b9 2130 r_flags |= REXEC_SCREAM;
7fba1cd6 2131
a0d0e21e 2132 orig = m = s;
07bc277f 2133 if (RX_EXTFLAGS(rx) & RXf_USE_INTUIT) {
ee0b7718 2134 PL_bostr = orig;
f9f4320a 2135 s = CALLREG_INTUIT_START(rx, TARG, s, strend, r_flags, NULL);
f722798b
IZ
2136
2137 if (!s)
2138 goto nope;
2139 /* How to do it in subst? */
07bc277f 2140/* if ( (RX_EXTFLAGS(rx) & RXf_CHECK_ALL)
1c846c1f 2141 && !PL_sawampersand
07bc277f
NC
2142 && !(RX_EXTFLAGS(rx) & RXf_KEEPCOPY)
2143 && ((RX_EXTFLAGS(rx) & RXf_NOSCAN)
2144 || !((RX_EXTFLAGS(rx) & RXf_INTUIT_TAIL)
f722798b
IZ
2145 && (r_flags & REXEC_SCREAM))))
2146 goto yup;
2147*/
a0d0e21e 2148 }
71be2cbc
PP
2149
2150 /* only replace once? */
a0d0e21e 2151 once = !(rpm->op_pmflags & PMf_GLOBAL);
10300be4
YO
2152 matched = CALLREGEXEC(rx, s, strend, orig, 0, TARG, NULL,
2153 r_flags | REXEC_CHECKED);
71be2cbc 2154 /* known replacement string? */
f272994b 2155 if (dstr) {
8514a05a
JH
2156 /* replacement needing upgrading? */
2157 if (DO_UTF8(TARG) && !doutf8) {
db79b45b 2158 nsv = sv_newmortal();
4a176938 2159 SvSetSV(nsv, dstr);
8514a05a
JH
2160 if (PL_encoding)
2161 sv_recode_to_utf8(nsv, PL_encoding);
2162 else
2163 sv_utf8_upgrade(nsv);
5c144d81 2164 c = SvPV_const(nsv, clen);
4a176938
JH
2165 doutf8 = TRUE;
2166 }
2167 else {
5c144d81 2168 c = SvPV_const(dstr, clen);
4a176938 2169 doutf8 = DO_UTF8(dstr);
8514a05a 2170 }
f272994b
A
2171 }
2172 else {
6136c704 2173 c = NULL;
f272994b
A
2174 doutf8 = FALSE;
2175 }
2176
71be2cbc 2177 /* can do inplace substitution? */
ed252734 2178 if (c
f8c7b90f 2179#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
2180 && !is_cow
2181#endif
07bc277f
NC
2182 && (I32)clen <= RX_MINLENRET(rx) && (once || !(r_flags & REXEC_COPY_STR))
2183 && !(RX_EXTFLAGS(rx) & RXf_LOOKBEHIND_SEEN)
db79b45b 2184 && (!doutf8 || SvUTF8(TARG))) {
10300be4 2185 if (!matched)
f722798b 2186 {
8ec5e241 2187 SPAGAIN;
3280af22 2188 PUSHs(&PL_sv_no);
71be2cbc
PP
2189 LEAVE_SCOPE(oldsave);
2190 RETURN;
2191 }
f8c7b90f 2192#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
2193 if (SvIsCOW(TARG)) {
2194 assert (!force_on_match);
2195 goto have_a_cow;
2196 }
2197#endif
71be2cbc
PP
2198 if (force_on_match) {
2199 force_on_match = 0;
2200 s = SvPV_force(TARG, len);
2201 goto force_it;
2202 }
71be2cbc 2203 d = s;
3280af22 2204 PL_curpm = pm;
71be2cbc
PP
2205 SvSCREAM_off(TARG); /* disable possible screamer */
2206 if (once) {
48c036b1 2207 rxtainted |= RX_MATCH_TAINTED(rx);
07bc277f
NC
2208 m = orig + RX_OFFS(rx)[0].start;
2209 d = orig + RX_OFFS(rx)[0].end;
71be2cbc
PP
2210 s = orig;
2211 if (m - s > strend - d) { /* faster to shorten from end */
2212 if (clen) {
2213 Copy(c, m, clen, char);
2214 m += clen;
a0d0e21e 2215 }
71be2cbc
PP
2216 i = strend - d;
2217 if (i > 0) {
2218 Move(d, m, i, char);
2219 m += i;
a0d0e21e 2220 }
71be2cbc
PP
2221 *m = '\0';
2222 SvCUR_set(TARG, m - s);
2223 }
155aba94 2224 else if ((i = m - s)) { /* faster from front */
71be2cbc
PP
2225 d -= clen;
2226 m = d;
0d3c21b0 2227 Move(s, d - i, i, char);
71be2cbc 2228 sv_chop(TARG, d-i);
71be2cbc
PP
2229 if (clen)
2230 Copy(c, m, clen, char);
2231 }
2232 else if (clen) {
2233 d -= clen;
2234 sv_chop(TARG, d);
2235 Copy(c, d, clen, char);
2236 }
2237 else {
2238 sv_chop(TARG, d);
2239 }
48c036b1 2240 TAINT_IF(rxtainted & 1);
8ec5e241 2241 SPAGAIN;
3280af22 2242 PUSHs(&PL_sv_yes);
71be2cbc
PP
2243 }
2244 else {
71be2cbc
PP
2245 do {
2246 if (iters++ > maxiters)
cea2e8a9 2247 DIE(aTHX_ "Substitution loop");
d9f97599 2248 rxtainted |= RX_MATCH_TAINTED(rx);
07bc277f 2249 m = RX_OFFS(rx)[0].start + orig;
155aba94 2250 if ((i = m - s)) {
71be2cbc
PP
2251 if (s != d)
2252 Move(s, d, i, char);
2253 d += i;
a0d0e21e 2254 }
71be2cbc
PP
2255 if (clen) {
2256 Copy(c, d, clen, char);
2257 d += clen;
2258 }
07bc277f 2259 s = RX_OFFS(rx)[0].end + orig;
f9f4320a 2260 } while (CALLREGEXEC(rx, s, strend, orig, s == m,
f722798b
IZ
2261 TARG, NULL,
2262 /* don't match same null twice */
2263 REXEC_NOT_FIRST|REXEC_IGNOREPOS));
71be2cbc
PP
2264 if (s != d) {
2265 i = strend - s;
aa07b2f6 2266 SvCUR_set(TARG, d - SvPVX_const(TARG) + i);
71be2cbc 2267 Move(s, d, i+1, char); /* include the NUL */
a0d0e21e 2268 }
48c036b1 2269 TAINT_IF(rxtainted & 1);
8ec5e241 2270 SPAGAIN;
6e449a3a 2271 mPUSHi((I32)iters);
a0d0e21e 2272 }
80b498e0 2273 (void)SvPOK_only_UTF8(TARG);
48c036b1 2274 TAINT_IF(rxtainted);
8ec5e241
NIS
2275 if (SvSMAGICAL(TARG)) {
2276 PUTBACK;
2277 mg_set(TARG);
2278 SPAGAIN;
2279 }
9212bbba 2280 SvTAINT(TARG);
aefe6dfc
JH
2281 if (doutf8)
2282 SvUTF8_on(TARG);
71be2cbc
PP
2283 LEAVE_SCOPE(oldsave);
2284 RETURN;
a0d0e21e 2285 }
71be2cbc 2286
10300be4 2287 if (matched)
f722798b 2288 {
a0d0e21e
LW
2289 if (force_on_match) {
2290 force_on_match = 0;
2291 s = SvPV_force(TARG, len);
2292 goto force_it;
2293 }
f8c7b90f 2294#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
2295 have_a_cow:
2296#endif
48c036b1 2297 rxtainted |= RX_MATCH_TAINTED(rx);
740cce10 2298 dstr = newSVpvn_utf8(m, s-m, DO_UTF8(TARG));
cff085c1 2299 SAVEFREESV(dstr);
3280af22 2300 PL_curpm = pm;
a0d0e21e 2301 if (!c) {
c09156bb 2302 register PERL_CONTEXT *cx;
8ec5e241 2303 SPAGAIN;
a0d0e21e 2304 PUSHSUBST(cx);
20e98b0f 2305 RETURNOP(cPMOP->op_pmreplrootu.op_pmreplroot);
a0d0e21e 2306 }
cf93c79d 2307 r_flags |= REXEC_IGNOREPOS | REXEC_NOT_FIRST;
a0d0e21e
LW
2308 do {
2309 if (iters++ > maxiters)
cea2e8a9 2310 DIE(aTHX_ "Substitution loop");
d9f97599 2311 rxtainted |= RX_MATCH_TAINTED(rx);
07bc277f 2312 if (RX_MATCH_COPIED(rx) && RX_SUBBEG(rx) != orig) {
a0d0e21e
LW
2313 m = s;
2314 s = orig;
07bc277f 2315 orig = RX_SUBBEG(rx);
a0d0e21e
LW
2316 s = orig + (m - s);
2317 strend = s + (strend - m);
2318 }
07bc277f 2319 m = RX_OFFS(rx)[0].start + orig;
db79b45b
JH
2320 if (doutf8 && !SvUTF8(dstr))
2321 sv_catpvn_utf8_upgrade(dstr, s, m - s, nsv);
2322 else
2323 sv_catpvn(dstr, s, m-s);
07bc277f 2324 s = RX_OFFS(rx)[0].end + orig;
a0d0e21e
LW
2325 if (clen)
2326 sv_catpvn(dstr, c, clen);
2327 if (once)
2328 break;
f9f4320a 2329 } while (CALLREGEXEC(rx, s, strend, orig, s == m,
ffc61ed2 2330 TARG, NULL, r_flags));
db79b45b
JH
2331 if (doutf8 && !DO_UTF8(TARG))
2332 sv_catpvn_utf8_upgrade(dstr, s, strend - s, nsv);
89afcb60
A
2333 else
2334 sv_catpvn(dstr, s, strend - s);
748a9306 2335
f8c7b90f 2336#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
2337 /* The match may make the string COW. If so, brilliant, because that's
2338 just saved us one malloc, copy and free - the regexp has donated
2339 the old buffer, and we malloc an entirely new one, rather than the
2340 regexp malloc()ing a buffer and copying our original, only for
2341 us to throw it away here during the substitution. */
2342 if (SvIsCOW(TARG)) {
2343 sv_force_normal_flags(TARG, SV_COW_DROP_PV);
2344 } else
2345#endif
2346 {
8bd4d4c5 2347 SvPV_free(TARG);
ed252734 2348 }
f880fe2f 2349 SvPV_set(TARG, SvPVX(dstr));
748a9306
LW
2350 SvCUR_set(TARG, SvCUR(dstr));
2351 SvLEN_set(TARG, SvLEN(dstr));
f272994b 2352 doutf8 |= DO_UTF8(dstr);
6136c704 2353 SvPV_set(dstr, NULL);
748a9306 2354
48c036b1 2355 TAINT_IF(rxtainted & 1);
f878fbec 2356 SPAGAIN;
6e449a3a 2357 mPUSHi((I32)iters);
48c036b1 2358
a0d0e21e 2359 (void)SvPOK_only(TARG);
f272994b 2360 if (doutf8)
60aeb6fd 2361 SvUTF8_on(TARG);
48c036b1 2362 TAINT_IF(rxtainted);
a0d0e21e 2363 SvSETMAGIC(TARG);
9212bbba 2364 SvTAINT(TARG);
4633a7c4 2365 LEAVE_SCOPE(oldsave);
a0d0e21e
LW
2366 RETURN;
2367 }
5cd24f17 2368 goto ret_no;
a0d0e21e
LW
2369
2370nope:
1c846c1f 2371ret_no:
8ec5e241 2372 SPAGAIN;
3280af22 2373 PUSHs(&PL_sv_no);
4633a7c4 2374 LEAVE_SCOPE(oldsave);
a0d0e21e
LW
2375 RETURN;
2376}
2377
2378PP(pp_grepwhile)
2379{
27da23d5 2380 dVAR; dSP;
a0d0e21e
LW
2381
2382 if (SvTRUEx(POPs))
3280af22
NIS
2383 PL_stack_base[PL_markstack_ptr[-1]++] = PL_stack_base[*PL_markstack_ptr];
2384 ++*PL_markstack_ptr;
a0d0e21e
LW
2385 LEAVE; /* exit inner scope */
2386
2387 /* All done yet? */
3280af22 2388 if (PL_stack_base + *PL_markstack_ptr > SP) {
a0d0e21e 2389 I32 items;
c4420975 2390 const I32 gimme = GIMME_V;
a0d0e21e
LW
2391
2392 LEAVE; /* exit outer scope */
2393 (void)POPMARK; /* pop src */
3280af22 2394 items = --*PL_markstack_ptr - PL_markstack_ptr[-1];
a0d0e21e 2395 (void)POPMARK; /* pop dst */
3280af22 2396 SP = PL_stack_base + POPMARK; /* pop original mark */
54310121 2397 if (gimme == G_SCALAR) {
7cc47870 2398 if (PL_op->op_private & OPpGREP_LEX) {
c4420975 2399 SV* const sv = sv_newmortal();
7cc47870
RGS
2400 sv_setiv(sv, items);
2401 PUSHs(sv);
2402 }
2403 else {
2404 dTARGET;
2405 XPUSHi(items);
2406 }
a0d0e21e 2407 }
54310121
PP
2408 else if (gimme == G_ARRAY)
2409 SP += items;
a0d0e21e
LW
2410 RETURN;
2411 }
2412 else {
2413 SV *src;
2414
2415 ENTER; /* enter inner scope */
1d7c1841 2416 SAVEVPTR(PL_curpm);
a0d0e21e 2417
3280af22 2418 src = PL_stack_base[*PL_markstack_ptr];
a0d0e21e 2419 SvTEMP_off(src);
59f00321
RGS
2420 if (PL_op->op_private & OPpGREP_LEX)
2421 PAD_SVl(PL_op->op_targ) = src;
2422 else
2423 DEFSV = src;
a0d0e21e
LW
2424
2425 RETURNOP(cLOGOP->op_other);
2426 }
2427}
2428
2429PP(pp_leavesub)
2430{
27da23d5 2431 dVAR; dSP;
a0d0e21e
LW
2432 SV **mark;
2433 SV **newsp;
2434 PMOP *newpm;
2435 I32 gimme;
c09156bb 2436 register PERL_CONTEXT *cx;
b0d9ce38 2437 SV *sv;
a0d0e21e 2438
9850bf21
RH
2439 if (CxMULTICALL(&cxstack[cxstack_ix]))
2440 return 0;
2441
a0d0e21e 2442 POPBLOCK(cx,newpm);
5dd42e15 2443 cxstack_ix++; /* temporarily protect top context */
1c846c1f 2444
a1f49e72 2445 TAINT_NOT;
a0d0e21e
LW
2446 if (gimme == G_SCALAR) {
2447 MARK = newsp + 1;
a29cdaf0 2448 if (MARK <= SP) {
a8bba7fa 2449 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
a29cdaf0
IZ
2450 if (SvTEMP(TOPs)) {
2451 *MARK = SvREFCNT_inc(TOPs);
2452 FREETMPS;
2453 sv_2mortal(*MARK);
cd06dffe
GS
2454 }
2455 else {
959e3673 2456 sv = SvREFCNT_inc(TOPs); /* FREETMPS could clobber it */
a29cdaf0 2457 FREETMPS;
959e3673
GS
2458 *MARK = sv_mortalcopy(sv);
2459 SvREFCNT_dec(sv);
a29cdaf0 2460 }
cd06dffe
GS
2461 }
2462 else
a29cdaf0 2463 *MARK = SvTEMP(TOPs) ? TOPs : sv_mortalcopy(TOPs);
cd06dffe
GS
2464 }
2465 else {
f86702cc 2466 MEXTEND(MARK, 0);
3280af22 2467 *MARK = &PL_sv_undef;
a0d0e21e
LW
2468 }
2469 SP = MARK;
2470 }
54310121 2471 else if (gimme == G_ARRAY) {
f86702cc 2472 for (MARK = newsp + 1; MARK <= SP; MARK++) {
a1f49e72 2473 if (!SvTEMP(*MARK)) {
f86702cc 2474 *MARK = sv_mortalcopy(*MARK);
a1f49e72
CS
2475 TAINT_NOT; /* Each item is independent */
2476 }
f86702cc 2477 }
a0d0e21e 2478 }
f86702cc 2479 PUTBACK;
1c846c1f 2480
5dd42e15
DM
2481 LEAVE;
2482 cxstack_ix--;
b0d9ce38 2483 POPSUB(cx,sv); /* Stack values are safe: release CV and @_ ... */
3280af22 2484 PL_curpm = newpm; /* ... and pop $1 et al */
a0d0e21e 2485
b0d9ce38 2486 LEAVESUB(sv);
f39bc417 2487 return cx->blk_sub.retop;
a0d0e21e
LW
2488}
2489
cd06dffe
GS
2490/* This duplicates the above code because the above code must not
2491 * get any slower by more conditions */
2492PP(pp_leavesublv)
2493{
27da23d5 2494 dVAR; dSP;
cd06dffe
GS
2495 SV **mark;
2496 SV **newsp;
2497 PMOP *newpm;
2498 I32 gimme;
2499 register PERL_CONTEXT *cx;
b0d9ce38 2500 SV *sv;
cd06dffe 2501
9850bf21
RH
2502 if (CxMULTICALL(&cxstack[cxstack_ix]))
2503 return 0;
2504
cd06dffe 2505 POPBLOCK(cx,newpm);
5dd42e15 2506 cxstack_ix++; /* temporarily protect top context */
1c846c1f 2507
cd06dffe
GS
2508 TAINT_NOT;
2509
bafb2adc 2510 if (CxLVAL(cx) & OPpENTERSUB_INARGS) {
cd06dffe
GS
2511 /* We are an argument to a function or grep().
2512 * This kind of lvalueness was legal before lvalue
2513 * subroutines too, so be backward compatible:
2514 * cannot report errors. */
2515
2516 /* Scalar context *is* possible, on the LHS of -> only,
2517 * as in f()->meth(). But this is not an lvalue. */
2518 if (gimme == G_SCALAR)
2519 goto temporise;
2520 if (gimme == G_ARRAY) {
a8bba7fa 2521 if (!CvLVALUE(cx->blk_sub.cv))
cd06dffe
GS
2522 goto temporise_array;
2523 EXTEND_MORTAL(SP - newsp);
2524 for (mark = newsp + 1; mark <= SP; mark++) {
2525 if (SvTEMP(*mark))
6f207bd3 2526 NOOP;
cd06dffe
GS
2527 else if (SvFLAGS(*mark) & (SVs_PADTMP | SVf_READONLY))
2528 *mark = sv_mortalcopy(*mark);
2529 else {
2530 /* Can be a localized value subject to deletion. */
2531 PL_tmps_stack[++PL_tmps_ix] = *mark;
b37c2d43 2532 SvREFCNT_inc_void(*mark);
cd06dffe
GS
2533 }
2534 }
2535 }
2536 }
bafb2adc 2537 else if (CxLVAL(cx)) { /* Leave it as it is if we can. */
cd06dffe
GS
2538 /* Here we go for robustness, not for speed, so we change all
2539 * the refcounts so the caller gets a live guy. Cannot set
2540 * TEMP, so sv_2mortal is out of question. */
a8bba7fa 2541 if (!CvLVALUE(cx->blk_sub.cv)) {
5dd42e15
DM
2542 LEAVE;
2543 cxstack_ix--;
b0d9ce38 2544 POPSUB(cx,sv);
d470f89e 2545 PL_curpm = newpm;
b0d9ce38 2546 LEAVESUB(sv);
d470f89e
GS
2547 DIE(aTHX_ "Can't modify non-lvalue subroutine call");
2548 }
cd06dffe
GS
2549 if (gimme == G_SCALAR) {
2550 MARK = newsp + 1;
2551 EXTEND_MORTAL(1);
2552 if (MARK == SP) {
f9bc45ef
TP
2553 /* Temporaries are bad unless they happen to be elements
2554 * of a tied hash or array */
2555 if (SvFLAGS(TOPs) & (SVs_TEMP | SVs_PADTMP | SVf_READONLY) &&
2556 !(SvRMAGICAL(TOPs) && mg_find(TOPs, PERL_MAGIC_tiedelem))) {
5dd42e15
DM
2557 LEAVE;
2558 cxstack_ix--;
b0d9ce38 2559 POPSUB(cx,sv);
d470f89e 2560 PL_curpm = newpm;
b0d9ce38 2561 LEAVESUB(sv);
e9f19e3c
HS
2562 DIE(aTHX_ "Can't return %s from lvalue subroutine",
2563 SvREADONLY(TOPs) ? (TOPs == &PL_sv_undef) ? "undef"
2564 : "a readonly value" : "a temporary");
d470f89e 2565 }
cd06dffe
GS
2566 else { /* Can be a localized value
2567 * subject to deletion. */
2568 PL_tmps_stack[++PL_tmps_ix] = *mark;
b37c2d43 2569 SvREFCNT_inc_void(*mark);
cd06dffe
GS
2570 }
2571 }
d470f89e 2572 else { /* Should not happen? */
5dd42e15
DM
2573 LEAVE;
2574 cxstack_ix--;
b0d9ce38 2575 POPSUB(cx,sv);
d470f89e 2576 PL_curpm = newpm;
b0d9ce38 2577 LEAVESUB(sv);
d470f89e 2578 DIE(aTHX_ "%s returned from lvalue subroutine in scalar context",
cd06dffe 2579 (MARK > SP ? "Empty array" : "Array"));
d470f89e 2580 }
cd06dffe
GS
2581 SP = MARK;
2582 }
2583 else if (gimme == G_ARRAY) {
2584 EXTEND_MORTAL(SP - newsp);
2585 for (mark = newsp + 1; mark <= SP; mark++) {
f206cdda
AMS
2586 if (*mark != &PL_sv_undef
2587 && SvFLAGS(*mark) & (SVs_TEMP | SVs_PADTMP | SVf_READONLY)) {
d470f89e
GS
2588 /* Might be flattened array after $#array = */
2589 PUTBACK;
5dd42e15
DM
2590 LEAVE;
2591 cxstack_ix--;
b0d9ce38 2592 POPSUB(cx,sv);
d470f89e 2593 PL_curpm = newpm;
b0d9ce38 2594 LEAVESUB(sv);
f206cdda
AMS
2595 DIE(aTHX_ "Can't return a %s from lvalue subroutine",
2596 SvREADONLY(TOPs) ? "readonly value" : "temporary");
d470f89e 2597 }
cd06dffe 2598 else {
cd06dffe
GS
2599 /* Can be a localized value subject to deletion. */
2600 PL_tmps_stack[++PL_tmps_ix] = *mark;
b37c2d43 2601 SvREFCNT_inc_void(*mark);
cd06dffe
GS
2602 }
2603 }
2604 }
2605 }
2606 else {
2607 if (gimme == G_SCALAR) {
2608 temporise:
2609 MARK = newsp + 1;
2610 if (MARK <= SP) {
a8bba7fa 2611 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
cd06dffe
GS
2612 if (SvTEMP(TOPs)) {
2613 *MARK = SvREFCNT_inc(TOPs);
2614 FREETMPS;
2615 sv_2mortal(*MARK);
2616 }
2617 else {
959e3673 2618 sv = SvREFCNT_inc(TOPs); /* FREETMPS could clobber it */
cd06dffe 2619 FREETMPS;
959e3673
GS
2620 *MARK = sv_mortalcopy(sv);
2621 SvREFCNT_dec(sv);
cd06dffe
GS
2622 }
2623 }
2624 else
2625 *MARK = SvTEMP(TOPs) ? TOPs : sv_mortalcopy(TOPs);
2626 }
2627 else {
2628 MEXTEND(MARK, 0);
2629 *MARK = &PL_sv_undef;
2630 }
2631 SP = MARK;
2632 }
2633 else if (gimme == G_ARRAY) {
2634 temporise_array:
2635 for (MARK = newsp + 1; MARK <= SP; MARK++) {
2636 if (!SvTEMP(*MARK)) {
2637 *MARK = sv_mortalcopy(*MARK);
2638 TAINT_NOT; /* Each item is independent */
2639 }
2640 }
2641 }
2642 }
2643 PUTBACK;
1c846c1f 2644
5dd42e15
DM
2645 LEAVE;
2646 cxstack_ix--;
b0d9ce38 2647 POPSUB(cx,sv); /* Stack values are safe: release CV and @_ ... */
cd06dffe
GS
2648 PL_curpm = newpm; /* ... and pop $1 et al */
2649
b0d9ce38 2650 LEAVESUB(sv);
f39bc417 2651 return cx->blk_sub.retop;
cd06dffe
GS
2652}
2653
a0d0e21e
LW
2654PP(pp_entersub)
2655{
27da23d5 2656 dVAR; dSP; dPOPss;
a0d0e21e 2657 GV *gv;
a0d0e21e 2658 register CV *cv;
c09156bb 2659 register PERL_CONTEXT *cx;
5d94fbed 2660 I32 gimme;
a9c4fd4e 2661 const bool hasargs = (PL_op->op_flags & OPf_STACKED) != 0;
a0d0e21e
LW
2662
2663 if (!sv)
cea2e8a9 2664 DIE(aTHX_ "Not a CODE reference");
a0d0e21e 2665 switch (SvTYPE(sv)) {
f1025168
NC
2666 /* This is overwhelming the most common case: */
2667 case SVt_PVGV:
f730a42d
NC
2668 if (!(cv = GvCVu((GV*)sv))) {
2669 HV *stash;
f2c0649b 2670 cv = sv_2cv(sv, &stash, &gv, 0);
f730a42d 2671 }
f1025168
NC
2672 if (!cv) {
2673 ENTER;
2674 SAVETMPS;
2675 goto try_autoload;
2676 }
2677 break;
a0d0e21e
LW
2678 default:
2679 if (!SvROK(sv)) {
a9c4fd4e 2680 const char *sym;
780a5241 2681 STRLEN len;
3280af22 2682 if (sv == &PL_sv_yes) { /* unfound import, ignore */
fb73857a 2683 if (hasargs)
3280af22 2684 SP = PL_stack_base + POPMARK;
a0d0e21e 2685 RETURN;
fb73857a 2686 }
15ff848f
CS
2687 if (SvGMAGICAL(sv)) {
2688 mg_get(sv);
f5f1d18e
AMS
2689 if (SvROK(sv))
2690 goto got_rv;
780a5241
NC
2691 if (SvPOKp(sv)) {
2692 sym = SvPVX_const(sv);
2693 len = SvCUR(sv);
2694 } else {
2695 sym = NULL;
2696 len = 0;
2697 }
15ff848f 2698 }
a9c4fd4e 2699 else {
780a5241 2700 sym = SvPV_const(sv, len);
a9c4fd4e 2701 }
15ff848f 2702 if (!sym)
cea2e8a9 2703 DIE(aTHX_ PL_no_usym, "a subroutine");
533c011a 2704 if (PL_op->op_private & HINT_STRICT_REFS)
cea2e8a9 2705 DIE(aTHX_ PL_no_symref, sym, "a subroutine");
780a5241 2706 cv = get_cvn_flags(sym, len, GV_ADD|SvUTF8(sv));
a0d0e21e
LW
2707 break;
2708 }
f5f1d18e 2709 got_rv:
f5284f61 2710 {
823a54a3 2711 SV * const * sp = &sv; /* Used in tryAMAGICunDEREF macro. */
f5284f61
IZ
2712 tryAMAGICunDEREF(to_cv);
2713 }
a0d0e21e
LW
2714 cv = (CV*)SvRV(sv);
2715 if (SvTYPE(cv) == SVt_PVCV)
2716 break;
2717 /* FALL THROUGH */
2718 case SVt_PVHV:
2719 case SVt_PVAV:
cea2e8a9 2720 DIE(aTHX_ "Not a CODE reference");
f1025168 2721 /* This is the second most common case: */
a0d0e21e
LW
2722 case SVt_PVCV:
2723 cv = (CV*)sv;
2724 break;
a0d0e21e
LW
2725 }
2726
2727 ENTER;
2728 SAVETMPS;
2729
2730 retry:
a0d0e21e 2731 if (!CvROOT(cv) && !CvXSUB(cv)) {
2f349aa0
NC
2732 GV* autogv;
2733 SV* sub_name;
2734
2735 /* anonymous or undef'd function leaves us no recourse */
2736 if (CvANON(cv) || !(gv = CvGV(cv)))
2737 DIE(aTHX_ "Undefined subroutine called");
2738
2739 /* autoloaded stub? */
2740 if (cv != GvCV(gv)) {
2741 cv = GvCV(gv);
2742 }
2743 /* should call AUTOLOAD now? */
2744 else {
7e623da3 2745try_autoload:
2f349aa0 2746 if ((autogv = gv_autoload4(GvSTASH(gv), GvNAME(gv), GvNAMELEN(gv),
7e623da3 2747 FALSE)))
2f349aa0
NC
2748 {
2749 cv = GvCV(autogv);
2750 }
2751 /* sorry */
2752 else {
2753 sub_name = sv_newmortal();
6136c704 2754 gv_efullname3(sub_name, gv, NULL);
be2597df 2755 DIE(aTHX_ "Undefined subroutine &%"SVf" called", SVfARG(sub_name));
2f349aa0
NC
2756 }
2757 }
2758 if (!cv)
2759 DIE(aTHX_ "Not a CODE reference");
2760 goto retry;
a0d0e21e
LW
2761 }
2762
54310121 2763 gimme = GIMME_V;
67caa1fe 2764 if ((PL_op->op_private & OPpENTERSUB_DB) && GvCV(PL_DBsub) && !CvNODEBUG(cv)) {
005a8a35 2765 Perl_get_db_sub(aTHX_ &sv, cv);
a9ef256d
NC
2766 if (CvISXSUB(cv))
2767 PL_curcopdb = PL_curcop;
2768 cv = GvCV(PL_DBsub);
2769
ccafdc96
RGS
2770 if (!cv || (!CvXSUB(cv) && !CvSTART(cv)))
2771 DIE(aTHX_ "No DB::sub routine defined");
67caa1fe 2772 }
a0d0e21e 2773
aed2304a 2774 if (!(CvISXSUB(cv))) {
f1025168 2775 /* This path taken at least 75% of the time */
a0d0e21e
LW
2776 dMARK;
2777 register I32 items = SP - MARK;
0bcc34c2 2778 AV* const padlist = CvPADLIST(cv);
a0d0e21e
LW
2779 PUSHBLOCK(cx, CXt_SUB, MARK);
2780 PUSHSUB(cx);
f39bc417 2781 cx->blk_sub.retop = PL_op->op_next;
a0d0e21e 2782 CvDEPTH(cv)++;
6b35e009
GS
2783 /* XXX This would be a natural place to set C<PL_compcv = cv> so
2784 * that eval'' ops within this sub know the correct lexical space.
a3985cdc
DM
2785 * Owing the speed considerations, we choose instead to search for
2786 * the cv using find_runcv() when calling doeval().
6b35e009 2787 */
3a76ca88
RGS
2788 if (CvDEPTH(cv) >= 2) {
2789 PERL_STACK_OVERFLOW_CHECK();
2790 pad_push(padlist, CvDEPTH(cv));
a0d0e21e 2791 }
3a76ca88
RGS
2792 SAVECOMPPAD();
2793 PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv));
2794 if (hasargs) {
0bcc34c2 2795 AV* const av = (AV*)PAD_SVl(0);
221373f0
GS
2796 if (AvREAL(av)) {
2797 /* @_ is normally not REAL--this should only ever
2798 * happen when DB::sub() calls things that modify @_ */
2799 av_clear(av);
2800 AvREAL_off(av);
2801 AvREIFY_on(av);
2802 }
3280af22 2803 cx->blk_sub.savearray = GvAV(PL_defgv);
b37c2d43 2804 GvAV(PL_defgv) = (AV*)SvREFCNT_inc_simple(av);
dd2155a4 2805 CX_CURPAD_SAVE(cx->blk_sub);
6d4ff0d2 2806 cx->blk_sub.argarray = av;
a0d0e21e
LW
2807 ++MARK;
2808
2809 if (items > AvMAX(av) + 1) {
504618e9 2810 SV **ary = AvALLOC(av);
a0d0e21e
LW
2811 if (AvARRAY(av) != ary) {
2812 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
9c6bc640 2813 AvARRAY(av) = ary;
a0d0e21e
LW
2814 }
2815 if (items > AvMAX(av) + 1) {
2816 AvMAX(av) = items - 1;
2817 Renew(ary,items,SV*);
2818 AvALLOC(av) = ary;
9c6bc640 2819 AvARRAY(av) = ary;
a0d0e21e
LW
2820 }
2821 }
2822 Copy(MARK,AvARRAY(av),items,SV*);
93965878 2823 AvFILLp(av) = items - 1;
1c846c1f 2824
a0d0e21e
LW
2825 while (items--) {
2826 if (*MARK)
2827 SvTEMP_off(*MARK);
2828 MARK++;
2829 }
2830 }
4a925ff6
GS
2831 /* warning must come *after* we fully set up the context
2832 * stuff so that __WARN__ handlers can safely dounwind()
2833 * if they want to
2834 */
2b9dff67 2835 if (CvDEPTH(cv) == PERL_SUB_DEPTH_WARN && ckWARN(WARN_RECURSION)
4a925ff6
GS
2836 && !(PERLDB_SUB && cv == GvCV(PL_DBsub)))
2837 sub_crush_depth(cv);
a0d0e21e
LW
2838 RETURNOP(CvSTART(cv));
2839 }
f1025168 2840 else {
3a76ca88 2841 I32 markix = TOPMARK;
f1025168 2842
3a76ca88 2843 PUTBACK;
f1025168 2844
3a76ca88
RGS
2845 if (!hasargs) {
2846 /* Need to copy @_ to stack. Alternative may be to
2847 * switch stack to @_, and copy return values
2848 * back. This would allow popping @_ in XSUB, e.g.. XXXX */
2849 AV * const av = GvAV(PL_defgv);
2850 const I32 items = AvFILLp(av) + 1; /* @_ is not tieable */
2851
2852 if (items) {
2853 /* Mark is at the end of the stack. */
2854 EXTEND(SP, items);
2855 Copy(AvARRAY(av), SP + 1, items, SV*);
2856 SP += items;
2857 PUTBACK ;
2858 }
2859 }
2860 /* We assume first XSUB in &DB::sub is the called one. */
2861 if (PL_curcopdb) {
2862 SAVEVPTR(PL_curcop);
2863 PL_curcop = PL_curcopdb;
2864 PL_curcopdb = NULL;
2865 }
2866 /* Do we need to open block here? XXXX */
2867 if (CvXSUB(cv)) /* XXX this is supposed to be true */
2868 (void)(*CvXSUB(cv))(aTHX_ cv);
2869
2870 /* Enforce some sanity in scalar context. */
2871 if (gimme == G_SCALAR && ++markix != PL_stack_sp - PL_stack_base ) {
2872 if (markix > PL_stack_sp - PL_stack_base)
2873 *(PL_stack_base + markix) = &PL_sv_undef;
2874 else
2875 *(PL_stack_base + markix) = *PL_stack_sp;
2876 PL_stack_sp = PL_stack_base + markix;
2877 }
f1025168
NC
2878 LEAVE;
2879 return NORMAL;
2880 }
a0d0e21e
LW
2881}
2882
44a8e56a 2883void
864dbfa3 2884Perl_sub_crush_depth(pTHX_ CV *cv)
44a8e56a 2885{
7918f24d
NC
2886 PERL_ARGS_ASSERT_SUB_CRUSH_DEPTH;
2887
44a8e56a 2888 if (CvANON(cv))
9014280d 2889 Perl_warner(aTHX_ packWARN(WARN_RECURSION), "Deep recursion on anonymous subroutine");
44a8e56a 2890 else {
aec46f14 2891 SV* const tmpstr = sv_newmortal();
6136c704 2892 gv_efullname3(tmpstr, CvGV(cv), NULL);
35c1215d 2893 Perl_warner(aTHX_ packWARN(WARN_RECURSION), "Deep recursion on subroutine \"%"SVf"\"",
be2597df 2894 SVfARG(tmpstr));
44a8e56a
PP
2895 }
2896}
2897
a0d0e21e
LW
2898PP(pp_aelem)
2899{
97aff369 2900 dVAR; dSP;
a0d0e21e 2901 SV** svp;
a3b680e6 2902 SV* const elemsv = POPs;
d804643f 2903 IV elem = SvIV(elemsv);
0bcc34c2 2904 AV* const av = (AV*)POPs;
e1ec3a88
AL
2905 const U32 lval = PL_op->op_flags & OPf_MOD || LVRET;
2906 const U32 defer = (PL_op->op_private & OPpLVAL_DEFER) && (elem > av_len(av));
be6c24e0 2907 SV *sv;
a0d0e21e 2908
e35c1634 2909 if (SvROK(elemsv) && !SvGAMAGIC(elemsv) && ckWARN(WARN_MISC))
95b63a38
JH
2910 Perl_warner(aTHX_ packWARN(WARN_MISC),
2911 "Use of reference \"%"SVf"\" as array index",
be2597df 2912 SVfARG(elemsv));
748a9306 2913 if (elem > 0)
fc15ae8f 2914 elem -= CopARYBASE_get(PL_curcop);
a0d0e21e
LW
2915 if (SvTYPE(av) != SVt_PVAV)
2916 RETPUSHUNDEF;
68dc0745 2917 svp = av_fetch(av, elem, lval && !defer);
a0d0e21e 2918 if (lval) {
2b573ace 2919#ifdef PERL_MALLOC_WRAP
2b573ace 2920 if (SvUOK(elemsv)) {
a9c4fd4e 2921 const UV uv = SvUV(elemsv);
2b573ace
JH
2922 elem = uv > IV_MAX ? IV_MAX : uv;
2923 }
2924 else if (SvNOK(elemsv))
2925 elem = (IV)SvNV(elemsv);
a3b680e6
AL
2926 if (elem > 0) {
2927 static const char oom_array_extend[] =
2928 "Out of memory during array extend"; /* Duplicated in av.c */
2b573ace 2929 MEM_WRAP_CHECK_1(elem,SV*,oom_array_extend);
a3b680e6 2930 }
2b573ace 2931#endif
3280af22 2932 if (!svp || *svp == &PL_sv_undef) {
68dc0745
PP
2933 SV* lv;
2934 if (!defer)
cea2e8a9 2935 DIE(aTHX_ PL_no_aelem, elem);
68dc0745
PP
2936 lv = sv_newmortal();
2937 sv_upgrade(lv, SVt_PVLV);
2938 LvTYPE(lv) = 'y';
a0714e2c 2939 sv_magic(lv, NULL, PERL_MAGIC_defelem, NULL, 0);
b37c2d43 2940 LvTARG(lv) = SvREFCNT_inc_simple(av);
68dc0745
PP
2941 LvTARGOFF(lv) = elem;
2942 LvTARGLEN(lv) = 1;
2943 PUSHs(lv);
2944 RETURN;
2945 }
bfc4de9f 2946 if (PL_op->op_private & OPpLVAL_INTRO)
161b7d16 2947 save_aelem(av, elem, svp);
533c011a
NIS
2948 else if (PL_op->op_private & OPpDEREF)
2949 vivify_ref(*svp, PL_op->op_private & OPpDEREF);
a0d0e21e 2950 }
3280af22 2951 sv = (svp ? *svp : &PL_sv_undef);
be6c24e0
GS
2952 if (!lval && SvGMAGICAL(sv)) /* see note in pp_helem() */
2953 sv = sv_mortalcopy(sv);
2954 PUSHs(sv);
a0d0e21e
LW
2955 RETURN;
2956}
2957
02a9e968 2958void
864dbfa3 2959Perl_vivify_ref(pTHX_ SV *sv, U32 to_what)
02a9e968 2960{
7918f24d
NC
2961 PERL_ARGS_ASSERT_VIVIFY_REF;
2962
5b295bef 2963 SvGETMAGIC(sv);
02a9e968
CS
2964 if (!SvOK(sv)) {
2965 if (SvREADONLY(sv))
cea2e8a9 2966 Perl_croak(aTHX_ PL_no_modify);
43230e26 2967 prepare_SV_for_RV(sv);
68dc0745 2968 switch (to_what) {
5f05dabc 2969 case OPpDEREF_SV:
561b68a9 2970 SvRV_set(sv, newSV(0));
5f05dabc
PP
2971 break;
2972 case OPpDEREF_AV:
b162af07 2973 SvRV_set(sv, (SV*)newAV());
5f05dabc
PP
2974 break;
2975 case OPpDEREF_HV:
b162af07 2976 SvRV_set(sv, (SV*)newHV());
5f05dabc
PP
2977 break;
2978 }
02a9e968
CS
2979 SvROK_on(sv);
2980 SvSETMAGIC(sv);
2981 }
2982}
2983
a0d0e21e
LW
2984PP(pp_method)
2985{
97aff369 2986 dVAR; dSP;
890ce7af 2987 SV* const sv = TOPs;
f5d5a27c
CS
2988
2989 if (SvROK(sv)) {
890ce7af 2990 SV* const rsv = SvRV(sv);
f5d5a27c
CS
2991 if (SvTYPE(rsv) == SVt_PVCV) {
2992 SETs(rsv);
2993 RETURN;
2994 }
2995 }
2996
4608196e 2997 SETs(method_common(sv, NULL));
f5d5a27c
CS
2998 RETURN;
2999}
3000
3001PP(pp_method_named)
3002{
97aff369 3003 dVAR; dSP;
890ce7af 3004 SV* const sv = cSVOP_sv;
c158a4fd 3005 U32 hash = SvSHARED_HASH(sv);
f5d5a27c
CS
3006
3007 XPUSHs(method_common(sv, &hash));
3008 RETURN;
3009}
3010
3011STATIC SV *
3012S_method_common(pTHX_ SV* meth, U32* hashp)
3013{
97aff369 3014 dVAR;
a0d0e21e
LW
3015 SV* ob;
3016 GV* gv;
56304f61 3017 HV* stash;
f5d5a27c 3018 STRLEN namelen;
6136c704 3019 const char* packname = NULL;
a0714e2c 3020 SV *packsv = NULL;
ac91690f 3021 STRLEN packlen;
46c461b5
AL
3022 const char * const name = SvPV_const(meth, namelen);
3023 SV * const sv = *(PL_stack_base + TOPMARK + 1);
f5d5a27c 3024
7918f24d
NC
3025 PERL_ARGS_ASSERT_METHOD_COMMON;
3026
4f1b7578
SC
3027 if (!sv)
3028 Perl_croak(aTHX_ "Can't call method \"%s\" on an undefined value", name);
3029
5b295bef 3030 SvGETMAGIC(sv);
a0d0e21e 3031 if (SvROK(sv))
16d20bd9 3032 ob = (SV*)SvRV(sv);
a0d0e21e
LW
3033 else {
3034 GV* iogv;
a0d0e21e 3035
af09ea45 3036 /* this isn't a reference */
5c144d81 3037 if(SvOK(sv) && (packname = SvPV_const(sv, packlen))) {
b464bac0 3038 const HE* const he = hv_fetch_ent(PL_stashcache, sv, 0, 0);
081fc587 3039 if (he) {
5e6396ae 3040 stash = INT2PTR(HV*,SvIV(HeVAL(he)));
081fc587
AB
3041 goto fetch;
3042 }
3043 }
3044
a0d0e21e 3045 if (!SvOK(sv) ||
05f5af9a 3046 !(packname) ||
f776e3cd 3047 !(iogv = gv_fetchsv(sv, 0, SVt_PVIO)) ||
a0d0e21e
LW
3048 !(ob=(SV*)GvIO(iogv)))
3049 {
af09ea45 3050 /* this isn't the name of a filehandle either */
1c846c1f 3051 if (!packname ||
fd400ab9 3052 ((UTF8_IS_START(*packname) && DO_UTF8(sv))
b86a2fa7 3053 ? !isIDFIRST_utf8((U8*)packname)
834a4ddd
LW
3054 : !isIDFIRST(*packname)
3055 ))
3056 {
f5d5a27c
CS
3057 Perl_croak(aTHX_ "Can't call method \"%s\" %s", name,
3058 SvOK(sv) ? "without a package or object reference"
3059 : "on an undefined value");
834a4ddd 3060 }
af09ea45 3061 /* assume it's a package name */
da51bb9b 3062 stash = gv_stashpvn(packname, packlen, 0);
0dae17bd
GS
3063 if (!stash)
3064 packsv = sv;
081fc587 3065 else {
d4c19fe8 3066 SV* const ref = newSViv(PTR2IV(stash));
04fe65b0 3067 (void)hv_store(PL_stashcache, packname, packlen, ref, 0);
7e8961ec 3068 }
ac91690f 3069 goto fetch;
a0d0e21e 3070 }
af09ea45 3071 /* it _is_ a filehandle name -- replace with a reference */
3280af22 3072 *(PL_stack_base + TOPMARK + 1) = sv_2mortal(newRV((SV*)iogv));
a0d0e21e
LW
3073 }
3074
af09ea45 3075 /* if we got here, ob should be a reference or a glob */
f0d43078
GS
3076 if (!ob || !(SvOBJECT(ob)
3077 || (SvTYPE(ob) == SVt_PVGV && (ob = (SV*)GvIO((GV*)ob))
3078 && SvOBJECT(ob))))
3079 {
f5d5a27c 3080 Perl_croak(aTHX_ "Can't call method \"%s\" on unblessed reference",
59e7186f 3081 (SvSCREAM(meth) && strEQ(name,"isa")) ? "DOES" :
f5d5a27c 3082 name);
f0d43078 3083 }
a0d0e21e 3084
56304f61 3085 stash = SvSTASH(ob);
a0d0e21e 3086
ac91690f 3087 fetch:
af09ea45
IK
3088 /* NOTE: stash may be null, hope hv_fetch_ent and
3089 gv_fetchmethod can cope (it seems they can) */
3090
f5d5a27c
CS
3091 /* shortcut for simple names */
3092 if (hashp) {
b464bac0 3093 const HE* const he = hv_fetch_ent(stash, meth, 0, *hashp);
f5d5a27c
CS
3094 if (he) {
3095 gv = (GV*)HeVAL(he);
3096 if (isGV(gv) && GvCV(gv) &&
e1a479c5 3097 (!GvCVGEN(gv) || GvCVGEN(gv)
dd69841b 3098 == (PL_sub_generation + HvMROMETA(stash)->cache_gen)))
f5d5a27c
CS
3099 return (SV*)GvCV(gv);
3100 }
3101 }
3102
256d1bb2
NC
3103 gv = gv_fetchmethod_flags(stash ? stash : (HV*)packsv, name,
3104 GV_AUTOLOAD | GV_CROAK);
9b9d0b15 3105
256d1bb2 3106 assert(gv);
9b9d0b15 3107
f5d5a27c 3108 return isGV(gv) ? (SV*)GvCV(gv) : (SV*)gv;
a0d0e21e 3109}
241d1a3b
NC
3110
3111/*
3112 * Local variables:
3113 * c-indentation-style: bsd
3114 * c-basic-offset: 4
3115 * indent-tabs-mode: t
3116 * End:
3117 *
37442d52
RGS
3118 * ex: set ts=8 sts=4 sw=4 noet:
3119 */