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[perl #73626] get magic wasn't called on 3rd arg of open
[perl5.git] / pp_hot.c
CommitLineData
a0d0e21e
LW
1/* pp_hot.c
2 *
1129b882
NC
3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
4 * 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 by Larry Wall and others
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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 *
4ac71550
TC
15 * Awake! Awake! Fear, Fire, Foes! Awake!
16 * Fire, Foes! Awake!
17 *
18 * [p.1007 of _The Lord of the Rings_, VI/viii: "The Scouring of the Shire"]
a0d0e21e
LW
19 */
20
166f8a29
DM
21/* This file contains 'hot' pp ("push/pop") functions that
22 * execute the opcodes that make up a perl program. A typical pp function
23 * expects to find its arguments on the stack, and usually pushes its
24 * results onto the stack, hence the 'pp' terminology. Each OP structure
25 * contains a pointer to the relevant pp_foo() function.
26 *
27 * By 'hot', we mean common ops whose execution speed is critical.
28 * By gathering them together into a single file, we encourage
29 * CPU cache hits on hot code. Also it could be taken as a warning not to
30 * change any code in this file unless you're sure it won't affect
31 * performance.
32 */
33
a0d0e21e 34#include "EXTERN.h"
864dbfa3 35#define PERL_IN_PP_HOT_C
a0d0e21e
LW
36#include "perl.h"
37
38/* Hot code. */
39
40PP(pp_const)
41{
97aff369 42 dVAR;
39644a26 43 dSP;
996c9baa 44 XPUSHs(cSVOP_sv);
a0d0e21e
LW
45 RETURN;
46}
47
48PP(pp_nextstate)
49{
97aff369 50 dVAR;
533c011a 51 PL_curcop = (COP*)PL_op;
a0d0e21e 52 TAINT_NOT; /* Each statement is presumed innocent */
3280af22 53 PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
a0d0e21e
LW
54 FREETMPS;
55 return NORMAL;
56}
57
58PP(pp_gvsv)
59{
97aff369 60 dVAR;
39644a26 61 dSP;
924508f0 62 EXTEND(SP,1);
533c011a 63 if (PL_op->op_private & OPpLVAL_INTRO)
1d7c1841 64 PUSHs(save_scalar(cGVOP_gv));
a0d0e21e 65 else
c69033f2 66 PUSHs(GvSVn(cGVOP_gv));
a0d0e21e
LW
67 RETURN;
68}
69
70PP(pp_null)
71{
97aff369 72 dVAR;
a0d0e21e
LW
73 return NORMAL;
74}
75
76PP(pp_pushmark)
77{
97aff369 78 dVAR;
3280af22 79 PUSHMARK(PL_stack_sp);
a0d0e21e
LW
80 return NORMAL;
81}
82
83PP(pp_stringify)
84{
97aff369 85 dVAR; dSP; dTARGET;
6050d10e 86 sv_copypv(TARG,TOPs);
a0d0e21e
LW
87 SETTARG;
88 RETURN;
89}
90
91PP(pp_gv)
92{
97aff369 93 dVAR; dSP;
ad64d0ec 94 XPUSHs(MUTABLE_SV(cGVOP_gv));
a0d0e21e
LW
95 RETURN;
96}
97
98PP(pp_and)
99{
97aff369 100 dVAR; dSP;
a0d0e21e
LW
101 if (!SvTRUE(TOPs))
102 RETURN;
103 else {
c960fc3b
SP
104 if (PL_op->op_type == OP_AND)
105 --SP;
a0d0e21e
LW
106 RETURNOP(cLOGOP->op_other);
107 }
108}
109
110PP(pp_sassign)
111{
97aff369 112 dVAR; dSP; dPOPTOPssrl;
748a9306 113
533c011a 114 if (PL_op->op_private & OPpASSIGN_BACKWARDS) {
0bd48802
AL
115 SV * const temp = left;
116 left = right; right = temp;
a0d0e21e 117 }
3280af22 118 if (PL_tainting && PL_tainted && !SvTAINTED(left))
a0d0e21e 119 TAINT_NOT;
e26df76a 120 if (PL_op->op_private & OPpASSIGN_CV_TO_GV) {
6136c704 121 SV * const cv = SvRV(left);
e26df76a
NC
122 const U32 cv_type = SvTYPE(cv);
123 const U32 gv_type = SvTYPE(right);
6136c704 124 const bool got_coderef = cv_type == SVt_PVCV || cv_type == SVt_PVFM;
e26df76a
NC
125
126 if (!got_coderef) {
127 assert(SvROK(cv));
128 }
129
ae6d515f 130 /* Can do the optimisation if right (LVALUE) is not a typeglob,
e26df76a
NC
131 left (RVALUE) is a reference to something, and we're in void
132 context. */
133 if (!got_coderef && gv_type != SVt_PVGV && GIMME_V == G_VOID) {
134 /* Is the target symbol table currently empty? */
6136c704 135 GV * const gv = gv_fetchsv(right, GV_NOINIT, SVt_PVGV);
bb112e5a 136 if (SvTYPE(gv) != SVt_PVGV && !SvOK(gv)) {
e26df76a
NC
137 /* Good. Create a new proxy constant subroutine in the target.
138 The gv becomes a(nother) reference to the constant. */
139 SV *const value = SvRV(cv);
140
ad64d0ec 141 SvUPGRADE(MUTABLE_SV(gv), SVt_IV);
1ccdb730 142 SvPCS_IMPORTED_on(gv);
e26df76a 143 SvRV_set(gv, value);
b37c2d43 144 SvREFCNT_inc_simple_void(value);
e26df76a
NC
145 SETs(right);
146 RETURN;
147 }
148 }
149
150 /* Need to fix things up. */
151 if (gv_type != SVt_PVGV) {
152 /* Need to fix GV. */
ad64d0ec 153 right = MUTABLE_SV(gv_fetchsv(right, GV_ADD, SVt_PVGV));
e26df76a
NC
154 }
155
156 if (!got_coderef) {
157 /* We've been returned a constant rather than a full subroutine,
158 but they expect a subroutine reference to apply. */
53a42478 159 if (SvROK(cv)) {
d343c3ef 160 ENTER_with_name("sassign_coderef");
53a42478
NC
161 SvREFCNT_inc_void(SvRV(cv));
162 /* newCONSTSUB takes a reference count on the passed in SV
163 from us. We set the name to NULL, otherwise we get into
164 all sorts of fun as the reference to our new sub is
165 donated to the GV that we're about to assign to.
166 */
ad64d0ec
NC
167 SvRV_set(left, MUTABLE_SV(newCONSTSUB(GvSTASH(right), NULL,
168 SvRV(cv))));
53a42478 169 SvREFCNT_dec(cv);
d343c3ef 170 LEAVE_with_name("sassign_coderef");
53a42478
NC
171 } else {
172 /* What can happen for the corner case *{"BONK"} = \&{"BONK"};
173 is that
174 First: ops for \&{"BONK"}; return us the constant in the
175 symbol table
176 Second: ops for *{"BONK"} cause that symbol table entry
177 (and our reference to it) to be upgraded from RV
178 to typeblob)
179 Thirdly: We get here. cv is actually PVGV now, and its
180 GvCV() is actually the subroutine we're looking for
181
182 So change the reference so that it points to the subroutine
183 of that typeglob, as that's what they were after all along.
184 */
159b6efe 185 GV *const upgraded = MUTABLE_GV(cv);
53a42478
NC
186 CV *const source = GvCV(upgraded);
187
188 assert(source);
189 assert(CvFLAGS(source) & CVf_CONST);
190
191 SvREFCNT_inc_void(source);
192 SvREFCNT_dec(upgraded);
ad64d0ec 193 SvRV_set(left, MUTABLE_SV(source));
53a42478 194 }
e26df76a 195 }
53a42478 196
e26df76a 197 }
54310121 198 SvSetMagicSV(right, left);
a0d0e21e
LW
199 SETs(right);
200 RETURN;
201}
202
203PP(pp_cond_expr)
204{
97aff369 205 dVAR; dSP;
a0d0e21e 206 if (SvTRUEx(POPs))
1a67a97c 207 RETURNOP(cLOGOP->op_other);
a0d0e21e 208 else
1a67a97c 209 RETURNOP(cLOGOP->op_next);
a0d0e21e
LW
210}
211
212PP(pp_unstack)
213{
97aff369 214 dVAR;
a0d0e21e
LW
215 I32 oldsave;
216 TAINT_NOT; /* Each statement is presumed innocent */
3280af22 217 PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
a0d0e21e 218 FREETMPS;
3280af22 219 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e
LW
220 LEAVE_SCOPE(oldsave);
221 return NORMAL;
222}
223
a0d0e21e
LW
224PP(pp_concat)
225{
97aff369 226 dVAR; dSP; dATARGET; tryAMAGICbin(concat,opASSIGN);
748a9306
LW
227 {
228 dPOPTOPssrl;
8d6d96c1
HS
229 bool lbyte;
230 STRLEN rlen;
d4c19fe8 231 const char *rpv = NULL;
a6b599c7 232 bool rbyte = FALSE;
a9c4fd4e 233 bool rcopied = FALSE;
8d6d96c1
HS
234
235 if (TARG == right && right != left) {
c75ab21a
RH
236 /* mg_get(right) may happen here ... */
237 rpv = SvPV_const(right, rlen);
238 rbyte = !DO_UTF8(right);
59cd0e26 239 right = newSVpvn_flags(rpv, rlen, SVs_TEMP);
349d4f2f 240 rpv = SvPV_const(right, rlen); /* no point setting UTF-8 here */
db79b45b 241 rcopied = TRUE;
8d6d96c1 242 }
7889fe52 243
8d6d96c1 244 if (TARG != left) {
a9c4fd4e 245 STRLEN llen;
5c144d81 246 const char* const lpv = SvPV_const(left, llen); /* mg_get(left) may happen here */
90f5826e 247 lbyte = !DO_UTF8(left);
8d6d96c1
HS
248 sv_setpvn(TARG, lpv, llen);
249 if (!lbyte)
250 SvUTF8_on(TARG);
251 else
252 SvUTF8_off(TARG);
253 }
254 else { /* TARG == left */
a9c4fd4e 255 STRLEN llen;
5b295bef 256 SvGETMAGIC(left); /* or mg_get(left) may happen here */
c75ab21a
RH
257 if (!SvOK(TARG)) {
258 if (left == right && ckWARN(WARN_UNINITIALIZED))
259 report_uninit(right);
76f68e9b 260 sv_setpvs(left, "");
c75ab21a 261 }
10516c54 262 (void)SvPV_nomg_const(left, llen); /* Needed to set UTF8 flag */
90f5826e
ST
263 lbyte = !DO_UTF8(left);
264 if (IN_BYTES)
265 SvUTF8_off(TARG);
8d6d96c1 266 }
a12c0f56 267
c75ab21a
RH
268 /* or mg_get(right) may happen here */
269 if (!rcopied) {
270 rpv = SvPV_const(right, rlen);
271 rbyte = !DO_UTF8(right);
272 }
8d6d96c1
HS
273 if (lbyte != rbyte) {
274 if (lbyte)
275 sv_utf8_upgrade_nomg(TARG);
276 else {
db79b45b 277 if (!rcopied)
59cd0e26 278 right = newSVpvn_flags(rpv, rlen, SVs_TEMP);
8d6d96c1 279 sv_utf8_upgrade_nomg(right);
349d4f2f 280 rpv = SvPV_const(right, rlen);
69b47968 281 }
a0d0e21e 282 }
8d6d96c1 283 sv_catpvn_nomg(TARG, rpv, rlen);
43ebc500 284
a0d0e21e
LW
285 SETTARG;
286 RETURN;
748a9306 287 }
a0d0e21e
LW
288}
289
290PP(pp_padsv)
291{
97aff369 292 dVAR; dSP; dTARGET;
a0d0e21e 293 XPUSHs(TARG);
533c011a
NIS
294 if (PL_op->op_flags & OPf_MOD) {
295 if (PL_op->op_private & OPpLVAL_INTRO)
952306ac
RGS
296 if (!(PL_op->op_private & OPpPAD_STATE))
297 SAVECLEARSV(PAD_SVl(PL_op->op_targ));
a62b51b8 298 if (PL_op->op_private & OPpDEREF) {
8ec5e241 299 PUTBACK;
dd2155a4 300 vivify_ref(PAD_SVl(PL_op->op_targ), PL_op->op_private & OPpDEREF);
8ec5e241
NIS
301 SPAGAIN;
302 }
4633a7c4 303 }
a0d0e21e
LW
304 RETURN;
305}
306
307PP(pp_readline)
308{
97aff369 309 dVAR;
f5284f61 310 tryAMAGICunTARGET(iter, 0);
159b6efe 311 PL_last_in_gv = MUTABLE_GV(*PL_stack_sp--);
6e592b3a
BM
312 if (!isGV_with_GP(PL_last_in_gv)) {
313 if (SvROK(PL_last_in_gv) && isGV_with_GP(SvRV(PL_last_in_gv)))
159b6efe 314 PL_last_in_gv = MUTABLE_GV(SvRV(PL_last_in_gv));
8efb3254 315 else {
f5284f61 316 dSP;
ad64d0ec 317 XPUSHs(MUTABLE_SV(PL_last_in_gv));
f5284f61 318 PUTBACK;
cea2e8a9 319 pp_rv2gv();
159b6efe 320 PL_last_in_gv = MUTABLE_GV(*PL_stack_sp--);
f5284f61
IZ
321 }
322 }
a0d0e21e
LW
323 return do_readline();
324}
325
326PP(pp_eq)
327{
97aff369 328 dVAR; dSP; tryAMAGICbinSET(eq,0);
4c9fe80f 329#ifndef NV_PRESERVES_UV
0bdaccee 330 if (SvROK(TOPs) && !SvAMAGIC(TOPs) && SvROK(TOPm1s) && !SvAMAGIC(TOPm1s)) {
e61d22ef
NC
331 SP--;
332 SETs(boolSV(SvRV(TOPs) == SvRV(TOPp1s)));
4c9fe80f
AS
333 RETURN;
334 }
335#endif
28e5dec8
JH
336#ifdef PERL_PRESERVE_IVUV
337 SvIV_please(TOPs);
338 if (SvIOK(TOPs)) {
4c9fe80f
AS
339 /* Unless the left argument is integer in range we are going
340 to have to use NV maths. Hence only attempt to coerce the
341 right argument if we know the left is integer. */
28e5dec8
JH
342 SvIV_please(TOPm1s);
343 if (SvIOK(TOPm1s)) {
0bd48802
AL
344 const bool auvok = SvUOK(TOPm1s);
345 const bool buvok = SvUOK(TOPs);
a12c0f56 346
1605159e
NC
347 if (auvok == buvok) { /* ## IV == IV or UV == UV ## */
348 /* Casting IV to UV before comparison isn't going to matter
349 on 2s complement. On 1s complement or sign&magnitude
350 (if we have any of them) it could to make negative zero
351 differ from normal zero. As I understand it. (Need to
352 check - is negative zero implementation defined behaviour
353 anyway?). NWC */
0bd48802
AL
354 const UV buv = SvUVX(POPs);
355 const UV auv = SvUVX(TOPs);
28e5dec8 356
28e5dec8
JH
357 SETs(boolSV(auv == buv));
358 RETURN;
359 }
360 { /* ## Mixed IV,UV ## */
1605159e 361 SV *ivp, *uvp;
28e5dec8 362 IV iv;
28e5dec8 363
1605159e 364 /* == is commutative so doesn't matter which is left or right */
28e5dec8 365 if (auvok) {
1605159e
NC
366 /* top of stack (b) is the iv */
367 ivp = *SP;
368 uvp = *--SP;
369 } else {
370 uvp = *SP;
371 ivp = *--SP;
372 }
373 iv = SvIVX(ivp);
d4c19fe8 374 if (iv < 0)
1605159e
NC
375 /* As uv is a UV, it's >0, so it cannot be == */
376 SETs(&PL_sv_no);
d4c19fe8
AL
377 else
378 /* we know iv is >= 0 */
379 SETs(boolSV((UV)iv == SvUVX(uvp)));
28e5dec8
JH
380 RETURN;
381 }
382 }
383 }
384#endif
a0d0e21e 385 {
cab190d4
JD
386#if defined(NAN_COMPARE_BROKEN) && defined(Perl_isnan)
387 dPOPTOPnnrl;
388 if (Perl_isnan(left) || Perl_isnan(right))
389 RETSETNO;
390 SETs(boolSV(left == right));
391#else
a0d0e21e 392 dPOPnv;
54310121 393 SETs(boolSV(TOPn == value));
cab190d4 394#endif
a0d0e21e
LW
395 RETURN;
396 }
397}
398
399PP(pp_preinc)
400{
97aff369 401 dVAR; dSP;
6e592b3a 402 if (SvTYPE(TOPs) >= SVt_PVAV || isGV_with_GP(TOPs))
f1f66076 403 DIE(aTHX_ "%s", PL_no_modify);
3510b4a1
NC
404 if (!SvREADONLY(TOPs) && SvIOK_notUV(TOPs) && !SvNOK(TOPs) && !SvPOK(TOPs)
405 && SvIVX(TOPs) != IV_MAX)
55497cff 406 {
45977657 407 SvIV_set(TOPs, SvIVX(TOPs) + 1);
55497cff 408 SvFLAGS(TOPs) &= ~(SVp_NOK|SVp_POK);
748a9306 409 }
28e5dec8 410 else /* Do all the PERL_PRESERVE_IVUV conditionals in sv_inc */
748a9306 411 sv_inc(TOPs);
a0d0e21e
LW
412 SvSETMAGIC(TOPs);
413 return NORMAL;
414}
415
416PP(pp_or)
417{
97aff369 418 dVAR; dSP;
a0d0e21e
LW
419 if (SvTRUE(TOPs))
420 RETURN;
421 else {
c960fc3b
SP
422 if (PL_op->op_type == OP_OR)
423 --SP;
a0d0e21e
LW
424 RETURNOP(cLOGOP->op_other);
425 }
426}
427
25a55bd7 428PP(pp_defined)
c963b151 429{
97aff369 430 dVAR; dSP;
6136c704
AL
431 register SV* sv;
432 bool defined;
25a55bd7 433 const int op_type = PL_op->op_type;
ea5195b7 434 const bool is_dor = (op_type == OP_DOR || op_type == OP_DORASSIGN);
c963b151 435
6136c704 436 if (is_dor) {
25a55bd7
SP
437 sv = TOPs;
438 if (!sv || !SvANY(sv)) {
2bd49cfc
NC
439 if (op_type == OP_DOR)
440 --SP;
25a55bd7
SP
441 RETURNOP(cLOGOP->op_other);
442 }
b7c44293
RGS
443 }
444 else {
445 /* OP_DEFINED */
25a55bd7
SP
446 sv = POPs;
447 if (!sv || !SvANY(sv))
448 RETPUSHNO;
b7c44293 449 }
25a55bd7 450
6136c704 451 defined = FALSE;
c963b151
BD
452 switch (SvTYPE(sv)) {
453 case SVt_PVAV:
454 if (AvMAX(sv) >= 0 || SvGMAGICAL(sv) || (SvRMAGICAL(sv) && mg_find(sv, PERL_MAGIC_tied)))
25a55bd7 455 defined = TRUE;
c963b151
BD
456 break;
457 case SVt_PVHV:
458 if (HvARRAY(sv) || SvGMAGICAL(sv) || (SvRMAGICAL(sv) && mg_find(sv, PERL_MAGIC_tied)))
25a55bd7 459 defined = TRUE;
c963b151
BD
460 break;
461 case SVt_PVCV:
462 if (CvROOT(sv) || CvXSUB(sv))
25a55bd7 463 defined = TRUE;
c963b151
BD
464 break;
465 default:
5b295bef 466 SvGETMAGIC(sv);
c963b151 467 if (SvOK(sv))
25a55bd7 468 defined = TRUE;
6136c704 469 break;
c963b151 470 }
6136c704
AL
471
472 if (is_dor) {
c960fc3b
SP
473 if(defined)
474 RETURN;
475 if(op_type == OP_DOR)
476 --SP;
25a55bd7 477 RETURNOP(cLOGOP->op_other);
25a55bd7 478 }
d9aa96a4
SP
479 /* assuming OP_DEFINED */
480 if(defined)
481 RETPUSHYES;
482 RETPUSHNO;
c963b151
BD
483}
484
a0d0e21e
LW
485PP(pp_add)
486{
800401ee
JH
487 dVAR; dSP; dATARGET; bool useleft; SV *svl, *svr;
488 tryAMAGICbin(add,opASSIGN);
489 svl = sv_2num(TOPm1s);
490 svr = sv_2num(TOPs);
491 useleft = USE_LEFT(svl);
28e5dec8
JH
492#ifdef PERL_PRESERVE_IVUV
493 /* We must see if we can perform the addition with integers if possible,
494 as the integer code detects overflow while the NV code doesn't.
495 If either argument hasn't had a numeric conversion yet attempt to get
496 the IV. It's important to do this now, rather than just assuming that
497 it's not IOK as a PV of "9223372036854775806" may not take well to NV
498 addition, and an SV which is NOK, NV=6.0 ought to be coerced to
499 integer in case the second argument is IV=9223372036854775806
500 We can (now) rely on sv_2iv to do the right thing, only setting the
501 public IOK flag if the value in the NV (or PV) slot is truly integer.
502
503 A side effect is that this also aggressively prefers integer maths over
7dca457a
NC
504 fp maths for integer values.
505
a00b5bd3 506 How to detect overflow?
7dca457a
NC
507
508 C 99 section 6.2.6.1 says
509
510 The range of nonnegative values of a signed integer type is a subrange
511 of the corresponding unsigned integer type, and the representation of
512 the same value in each type is the same. A computation involving
513 unsigned operands can never overflow, because a result that cannot be
514 represented by the resulting unsigned integer type is reduced modulo
515 the number that is one greater than the largest value that can be
516 represented by the resulting type.
517
518 (the 9th paragraph)
519
520 which I read as "unsigned ints wrap."
521
522 signed integer overflow seems to be classed as "exception condition"
523
524 If an exceptional condition occurs during the evaluation of an
525 expression (that is, if the result is not mathematically defined or not
526 in the range of representable values for its type), the behavior is
527 undefined.
528
529 (6.5, the 5th paragraph)
530
531 I had assumed that on 2s complement machines signed arithmetic would
532 wrap, hence coded pp_add and pp_subtract on the assumption that
533 everything perl builds on would be happy. After much wailing and
534 gnashing of teeth it would seem that irix64 knows its ANSI spec well,
535 knows that it doesn't need to, and doesn't. Bah. Anyway, the all-
536 unsigned code below is actually shorter than the old code. :-)
537 */
538
800401ee
JH
539 SvIV_please(svr);
540 if (SvIOK(svr)) {
28e5dec8
JH
541 /* Unless the left argument is integer in range we are going to have to
542 use NV maths. Hence only attempt to coerce the right argument if
543 we know the left is integer. */
9c5ffd7c
JH
544 register UV auv = 0;
545 bool auvok = FALSE;
7dca457a
NC
546 bool a_valid = 0;
547
28e5dec8 548 if (!useleft) {
7dca457a
NC
549 auv = 0;
550 a_valid = auvok = 1;
551 /* left operand is undef, treat as zero. + 0 is identity,
552 Could SETi or SETu right now, but space optimise by not adding
553 lots of code to speed up what is probably a rarish case. */
554 } else {
555 /* Left operand is defined, so is it IV? */
800401ee
JH
556 SvIV_please(svl);
557 if (SvIOK(svl)) {
558 if ((auvok = SvUOK(svl)))
559 auv = SvUVX(svl);
7dca457a 560 else {
800401ee 561 register const IV aiv = SvIVX(svl);
7dca457a
NC
562 if (aiv >= 0) {
563 auv = aiv;
564 auvok = 1; /* Now acting as a sign flag. */
565 } else { /* 2s complement assumption for IV_MIN */
566 auv = (UV)-aiv;
567 }
568 }
569 a_valid = 1;
28e5dec8
JH
570 }
571 }
7dca457a
NC
572 if (a_valid) {
573 bool result_good = 0;
574 UV result;
575 register UV buv;
800401ee 576 bool buvok = SvUOK(svr);
a00b5bd3 577
7dca457a 578 if (buvok)
800401ee 579 buv = SvUVX(svr);
7dca457a 580 else {
800401ee 581 register const IV biv = SvIVX(svr);
7dca457a
NC
582 if (biv >= 0) {
583 buv = biv;
584 buvok = 1;
585 } else
586 buv = (UV)-biv;
587 }
588 /* ?uvok if value is >= 0. basically, flagged as UV if it's +ve,
602f51c4 589 else "IV" now, independent of how it came in.
7dca457a
NC
590 if a, b represents positive, A, B negative, a maps to -A etc
591 a + b => (a + b)
592 A + b => -(a - b)
593 a + B => (a - b)
594 A + B => -(a + b)
595 all UV maths. negate result if A negative.
596 add if signs same, subtract if signs differ. */
597
598 if (auvok ^ buvok) {
599 /* Signs differ. */
600 if (auv >= buv) {
601 result = auv - buv;
602 /* Must get smaller */
603 if (result <= auv)
604 result_good = 1;
605 } else {
606 result = buv - auv;
607 if (result <= buv) {
608 /* result really should be -(auv-buv). as its negation
609 of true value, need to swap our result flag */
610 auvok = !auvok;
611 result_good = 1;
28e5dec8
JH
612 }
613 }
7dca457a
NC
614 } else {
615 /* Signs same */
616 result = auv + buv;
617 if (result >= auv)
618 result_good = 1;
619 }
620 if (result_good) {
621 SP--;
622 if (auvok)
28e5dec8 623 SETu( result );
7dca457a
NC
624 else {
625 /* Negate result */
626 if (result <= (UV)IV_MIN)
627 SETi( -(IV)result );
628 else {
629 /* result valid, but out of range for IV. */
630 SETn( -(NV)result );
28e5dec8
JH
631 }
632 }
7dca457a
NC
633 RETURN;
634 } /* Overflow, drop through to NVs. */
28e5dec8
JH
635 }
636 }
637#endif
a0d0e21e 638 {
4efa5a16
RD
639 NV value = SvNV(svr);
640 (void)POPs;
28e5dec8
JH
641 if (!useleft) {
642 /* left operand is undef, treat as zero. + 0.0 is identity. */
643 SETn(value);
644 RETURN;
645 }
4efa5a16 646 SETn( value + SvNV(svl) );
28e5dec8 647 RETURN;
a0d0e21e
LW
648 }
649}
650
651PP(pp_aelemfast)
652{
97aff369 653 dVAR; dSP;
502c6561
NC
654 AV * const av = PL_op->op_flags & OPf_SPECIAL
655 ? MUTABLE_AV(PAD_SV(PL_op->op_targ)) : GvAV(cGVOP_gv);
a3b680e6 656 const U32 lval = PL_op->op_flags & OPf_MOD;
0bd48802 657 SV** const svp = av_fetch(av, PL_op->op_private, lval);
3280af22 658 SV *sv = (svp ? *svp : &PL_sv_undef);
6ff81951 659 EXTEND(SP, 1);
be6c24e0
GS
660 if (!lval && SvGMAGICAL(sv)) /* see note in pp_helem() */
661 sv = sv_mortalcopy(sv);
662 PUSHs(sv);
a0d0e21e
LW
663 RETURN;
664}
665
666PP(pp_join)
667{
97aff369 668 dVAR; dSP; dMARK; dTARGET;
a0d0e21e
LW
669 MARK++;
670 do_join(TARG, *MARK, MARK, SP);
671 SP = MARK;
672 SETs(TARG);
673 RETURN;
674}
675
676PP(pp_pushre)
677{
97aff369 678 dVAR; dSP;
44a8e56a
PP
679#ifdef DEBUGGING
680 /*
681 * We ass_u_me that LvTARGOFF() comes first, and that two STRLENs
682 * will be enough to hold an OP*.
683 */
c4420975 684 SV* const sv = sv_newmortal();
44a8e56a
PP
685 sv_upgrade(sv, SVt_PVLV);
686 LvTYPE(sv) = '/';
533c011a 687 Copy(&PL_op, &LvTARGOFF(sv), 1, OP*);
44a8e56a
PP
688 XPUSHs(sv);
689#else
ad64d0ec 690 XPUSHs(MUTABLE_SV(PL_op));
44a8e56a 691#endif
a0d0e21e
LW
692 RETURN;
693}
694
695/* Oversized hot code. */
696
697PP(pp_print)
698{
27da23d5 699 dVAR; dSP; dMARK; dORIGMARK;
a0d0e21e 700 IO *io;
760ac839 701 register PerlIO *fp;
236988e4 702 MAGIC *mg;
159b6efe
NC
703 GV * const gv
704 = (PL_op->op_flags & OPf_STACKED) ? MUTABLE_GV(*++MARK) : PL_defoutgv;
5b468f54
AMS
705
706 if (gv && (io = GvIO(gv))
ad64d0ec 707 && (mg = SvTIED_mg((const SV *)io, PERL_MAGIC_tiedscalar)))
5b468f54 708 {
01bb7c6d 709 had_magic:
68dc0745 710 if (MARK == ORIGMARK) {
1c846c1f 711 /* If using default handle then we need to make space to
a60c0954
NIS
712 * pass object as 1st arg, so move other args up ...
713 */
4352c267 714 MEXTEND(SP, 1);
68dc0745
PP
715 ++MARK;
716 Move(MARK, MARK + 1, (SP - MARK) + 1, SV*);
717 ++SP;
718 }
719 PUSHMARK(MARK - 1);
ad64d0ec 720 *MARK = SvTIED_obj(MUTABLE_SV(io), mg);
68dc0745 721 PUTBACK;
d343c3ef 722 ENTER_with_name("call_PRINT");
3a28f3fb
MS
723 if( PL_op->op_type == OP_SAY ) {
724 /* local $\ = "\n" */
084e50c2 725 SAVEGENERICSV(PL_ors_sv);
3a28f3fb
MS
726 PL_ors_sv = newSVpvs("\n");
727 }
864dbfa3 728 call_method("PRINT", G_SCALAR);
d343c3ef 729 LEAVE_with_name("call_PRINT");
236988e4 730 SPAGAIN;
68dc0745
PP
731 MARK = ORIGMARK + 1;
732 *MARK = *SP;
733 SP = MARK;
236988e4
PP
734 RETURN;
735 }
a0d0e21e 736 if (!(io = GvIO(gv))) {
5b468f54 737 if ((GvEGV(gv)) && (io = GvIO(GvEGV(gv)))
ad64d0ec 738 && (mg = SvTIED_mg((const SV *)io, PERL_MAGIC_tiedscalar)))
01bb7c6d 739 goto had_magic;
2dd78f96
JH
740 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
741 report_evil_fh(gv, io, PL_op->op_type);
93189314 742 SETERRNO(EBADF,RMS_IFI);
a0d0e21e
LW
743 goto just_say_no;
744 }
745 else if (!(fp = IoOFP(io))) {
599cee73 746 if (ckWARN2(WARN_CLOSED, WARN_IO)) {
4c80c0b2
NC
747 if (IoIFP(io))
748 report_evil_fh(gv, io, OP_phoney_INPUT_ONLY);
2dd78f96 749 else if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
bc37a18f 750 report_evil_fh(gv, io, PL_op->op_type);
a0d0e21e 751 }
93189314 752 SETERRNO(EBADF,IoIFP(io)?RMS_FAC:RMS_IFI);
a0d0e21e
LW
753 goto just_say_no;
754 }
755 else {
e23d9e2f 756 SV * const ofs = GvSV(PL_ofsgv); /* $, */
a0d0e21e 757 MARK++;
e23d9e2f 758 if (ofs && (SvGMAGICAL(ofs) || SvOK(ofs))) {
a0d0e21e
LW
759 while (MARK <= SP) {
760 if (!do_print(*MARK, fp))
761 break;
762 MARK++;
763 if (MARK <= SP) {
e23d9e2f
CS
764 /* don't use 'ofs' here - it may be invalidated by magic callbacks */
765 if (!do_print(GvSV(PL_ofsgv), fp)) {
a0d0e21e
LW
766 MARK--;
767 break;
768 }
769 }
770 }
771 }
772 else {
773 while (MARK <= SP) {
774 if (!do_print(*MARK, fp))
775 break;
776 MARK++;
777 }
778 }
779 if (MARK <= SP)
780 goto just_say_no;
781 else {
cfc4a7da
GA
782 if (PL_op->op_type == OP_SAY) {
783 if (PerlIO_write(fp, "\n", 1) == 0 || PerlIO_error(fp))
784 goto just_say_no;
785 }
786 else if (PL_ors_sv && SvOK(PL_ors_sv))
7889fe52 787 if (!do_print(PL_ors_sv, fp)) /* $\ */
a0d0e21e
LW
788 goto just_say_no;
789
790 if (IoFLAGS(io) & IOf_FLUSH)
760ac839 791 if (PerlIO_flush(fp) == EOF)
a0d0e21e
LW
792 goto just_say_no;
793 }
794 }
795 SP = ORIGMARK;
e52fd6f4 796 XPUSHs(&PL_sv_yes);
a0d0e21e
LW
797 RETURN;
798
799 just_say_no:
800 SP = ORIGMARK;
e52fd6f4 801 XPUSHs(&PL_sv_undef);
a0d0e21e
LW
802 RETURN;
803}
804
805PP(pp_rv2av)
806{
97aff369 807 dVAR; dSP; dTOPss;
cde874ca 808 const I32 gimme = GIMME_V;
17ab7946
NC
809 static const char an_array[] = "an ARRAY";
810 static const char a_hash[] = "a HASH";
811 const bool is_pp_rv2av = PL_op->op_type == OP_RV2AV;
d83b45b8 812 const svtype type = is_pp_rv2av ? SVt_PVAV : SVt_PVHV;
a0d0e21e
LW
813
814 if (SvROK(sv)) {
815 wasref:
17ab7946 816 tryAMAGICunDEREF_var(is_pp_rv2av ? to_av_amg : to_hv_amg);
f5284f61 817
17ab7946
NC
818 sv = SvRV(sv);
819 if (SvTYPE(sv) != type)
820 DIE(aTHX_ "Not %s reference", is_pp_rv2av ? an_array : a_hash);
533c011a 821 if (PL_op->op_flags & OPf_REF) {
17ab7946 822 SETs(sv);
a0d0e21e
LW
823 RETURN;
824 }
78f9721b 825 else if (LVRET) {
cde874ca 826 if (gimme != G_ARRAY)
042560a6 827 goto croak_cant_return;
17ab7946 828 SETs(sv);
78f9721b
SM
829 RETURN;
830 }
82d03984
RGS
831 else if (PL_op->op_flags & OPf_MOD
832 && PL_op->op_private & OPpLVAL_INTRO)
f1f66076 833 Perl_croak(aTHX_ "%s", PL_no_localize_ref);
a0d0e21e
LW
834 }
835 else {
17ab7946 836 if (SvTYPE(sv) == type) {
533c011a 837 if (PL_op->op_flags & OPf_REF) {
17ab7946 838 SETs(sv);
a0d0e21e
LW
839 RETURN;
840 }
78f9721b 841 else if (LVRET) {
cde874ca 842 if (gimme != G_ARRAY)
042560a6 843 goto croak_cant_return;
17ab7946 844 SETs(sv);
78f9721b
SM
845 RETURN;
846 }
a0d0e21e
LW
847 }
848 else {
67955e0c 849 GV *gv;
1c846c1f 850
6e592b3a 851 if (!isGV_with_GP(sv)) {
a0d0e21e
LW
852 if (SvGMAGICAL(sv)) {
853 mg_get(sv);
854 if (SvROK(sv))
855 goto wasref;
856 }
dc3c76f8
NC
857 gv = Perl_softref2xv(aTHX_ sv, is_pp_rv2av ? an_array : a_hash,
858 type, &sp);
859 if (!gv)
860 RETURN;
35cd451c
GS
861 }
862 else {
159b6efe 863 gv = MUTABLE_GV(sv);
a0d0e21e 864 }
ad64d0ec 865 sv = is_pp_rv2av ? MUTABLE_SV(GvAVn(gv)) : MUTABLE_SV(GvHVn(gv));
533c011a 866 if (PL_op->op_private & OPpLVAL_INTRO)
ad64d0ec 867 sv = is_pp_rv2av ? MUTABLE_SV(save_ary(gv)) : MUTABLE_SV(save_hash(gv));
533c011a 868 if (PL_op->op_flags & OPf_REF) {
17ab7946 869 SETs(sv);
a0d0e21e
LW
870 RETURN;
871 }
78f9721b 872 else if (LVRET) {
cde874ca 873 if (gimme != G_ARRAY)
042560a6 874 goto croak_cant_return;
17ab7946 875 SETs(sv);
78f9721b
SM
876 RETURN;
877 }
a0d0e21e
LW
878 }
879 }
880
17ab7946 881 if (is_pp_rv2av) {
502c6561 882 AV *const av = MUTABLE_AV(sv);
17ab7946
NC
883 /* The guts of pp_rv2av, with no intenting change to preserve history
884 (until such time as we get tools that can do blame annotation across
885 whitespace changes. */
cde874ca 886 if (gimme == G_ARRAY) {
a3b680e6 887 const I32 maxarg = AvFILL(av) + 1;
c2444246 888 (void)POPs; /* XXXX May be optimized away? */
1c846c1f 889 EXTEND(SP, maxarg);
93965878 890 if (SvRMAGICAL(av)) {
1c846c1f 891 U32 i;
eb160463 892 for (i=0; i < (U32)maxarg; i++) {
0bcc34c2 893 SV ** const svp = av_fetch(av, i, FALSE);
547d1dd8
HS
894 /* See note in pp_helem, and bug id #27839 */
895 SP[i+1] = svp
896 ? SvGMAGICAL(*svp) ? sv_mortalcopy(*svp) : *svp
897 : &PL_sv_undef;
93965878 898 }
1c846c1f 899 }
93965878
NIS
900 else {
901 Copy(AvARRAY(av), SP+1, maxarg, SV*);
902 }
a0d0e21e
LW
903 SP += maxarg;
904 }
cde874ca 905 else if (gimme == G_SCALAR) {
a0d0e21e 906 dTARGET;
a3b680e6 907 const I32 maxarg = AvFILL(av) + 1;
f5284f61 908 SETi(maxarg);
a0d0e21e 909 }
17ab7946
NC
910 } else {
911 /* The guts of pp_rv2hv */
be85d344 912 if (gimme == G_ARRAY) { /* array wanted */
17ab7946 913 *PL_stack_sp = sv;
cea2e8a9 914 return do_kv();
a0d0e21e 915 }
be85d344 916 else if (gimme == G_SCALAR) {
a0d0e21e 917 dTARGET;
85fbaab2 918 TARG = Perl_hv_scalar(aTHX_ MUTABLE_HV(sv));
5e17dd7d 919 SPAGAIN;
a0d0e21e 920 SETTARG;
a0d0e21e 921 }
17ab7946 922 }
be85d344 923 RETURN;
042560a6
NC
924
925 croak_cant_return:
926 Perl_croak(aTHX_ "Can't return %s to lvalue scalar context",
927 is_pp_rv2av ? "array" : "hash");
77e217c6 928 RETURN;
a0d0e21e
LW
929}
930
10c8fecd
GS
931STATIC void
932S_do_oddball(pTHX_ HV *hash, SV **relem, SV **firstrelem)
933{
97aff369 934 dVAR;
7918f24d
NC
935
936 PERL_ARGS_ASSERT_DO_ODDBALL;
937
10c8fecd
GS
938 if (*relem) {
939 SV *tmpstr;
b464bac0 940 const HE *didstore;
6d822dc4
MS
941
942 if (ckWARN(WARN_MISC)) {
a3b680e6 943 const char *err;
10c8fecd
GS
944 if (relem == firstrelem &&
945 SvROK(*relem) &&
946 (SvTYPE(SvRV(*relem)) == SVt_PVAV ||
947 SvTYPE(SvRV(*relem)) == SVt_PVHV))
948 {
a3b680e6 949 err = "Reference found where even-sized list expected";
10c8fecd
GS
950 }
951 else
a3b680e6 952 err = "Odd number of elements in hash assignment";
f1f66076 953 Perl_warner(aTHX_ packWARN(WARN_MISC), "%s", err);
10c8fecd 954 }
6d822dc4 955
561b68a9 956 tmpstr = newSV(0);
6d822dc4
MS
957 didstore = hv_store_ent(hash,*relem,tmpstr,0);
958 if (SvMAGICAL(hash)) {
959 if (SvSMAGICAL(tmpstr))
960 mg_set(tmpstr);
961 if (!didstore)
962 sv_2mortal(tmpstr);
963 }
964 TAINT_NOT;
10c8fecd
GS
965 }
966}
967
a0d0e21e
LW
968PP(pp_aassign)
969{
27da23d5 970 dVAR; dSP;
3280af22
NIS
971 SV **lastlelem = PL_stack_sp;
972 SV **lastrelem = PL_stack_base + POPMARK;
973 SV **firstrelem = PL_stack_base + POPMARK + 1;
a0d0e21e
LW
974 SV **firstlelem = lastrelem + 1;
975
976 register SV **relem;
977 register SV **lelem;
978
979 register SV *sv;
980 register AV *ary;
981
54310121 982 I32 gimme;
a0d0e21e
LW
983 HV *hash;
984 I32 i;
985 int magic;
ca65944e 986 int duplicates = 0;
cbbf8932 987 SV **firsthashrelem = NULL; /* "= 0" keeps gcc 2.95 quiet */
5637b936 988
3280af22 989 PL_delaymagic = DM_DELAY; /* catch simultaneous items */
ca65944e 990 gimme = GIMME_V;
a0d0e21e
LW
991
992 /* If there's a common identifier on both sides we have to take
993 * special care that assigning the identifier on the left doesn't
994 * clobber a value on the right that's used later in the list.
995 */
10c8fecd 996 if (PL_op->op_private & (OPpASSIGN_COMMON)) {
cc5e57d2 997 EXTEND_MORTAL(lastrelem - firstrelem + 1);
10c8fecd 998 for (relem = firstrelem; relem <= lastrelem; relem++) {
155aba94 999 if ((sv = *relem)) {
a1f49e72 1000 TAINT_NOT; /* Each item is independent */
10c8fecd 1001 *relem = sv_mortalcopy(sv);
a1f49e72 1002 }
10c8fecd 1003 }
a0d0e21e
LW
1004 }
1005
1006 relem = firstrelem;
1007 lelem = firstlelem;
4608196e
RGS
1008 ary = NULL;
1009 hash = NULL;
10c8fecd 1010
a0d0e21e 1011 while (lelem <= lastlelem) {
bbce6d69 1012 TAINT_NOT; /* Each item stands on its own, taintwise. */
a0d0e21e
LW
1013 sv = *lelem++;
1014 switch (SvTYPE(sv)) {
1015 case SVt_PVAV:
502c6561 1016 ary = MUTABLE_AV(sv);
748a9306 1017 magic = SvMAGICAL(ary) != 0;
a0d0e21e 1018 av_clear(ary);
7e42bd57 1019 av_extend(ary, lastrelem - relem);
a0d0e21e
LW
1020 i = 0;
1021 while (relem <= lastrelem) { /* gobble up all the rest */
5117ca91 1022 SV **didstore;
a0d0e21e 1023 assert(*relem);
f2b990bf 1024 sv = newSVsv(*relem);
a0d0e21e 1025 *(relem++) = sv;
5117ca91
GS
1026 didstore = av_store(ary,i++,sv);
1027 if (magic) {
90630e3c
VP
1028 if (SvSMAGICAL(sv)) {
1029 /* More magic can happen in the mg_set callback, so we
1030 * backup the delaymagic for now. */
1031 U16 dmbak = PL_delaymagic;
1032 PL_delaymagic = 0;
fb73857a 1033 mg_set(sv);
90630e3c
VP
1034 PL_delaymagic = dmbak;
1035 }
5117ca91 1036 if (!didstore)
8127e0e3 1037 sv_2mortal(sv);
5117ca91 1038 }
bbce6d69 1039 TAINT_NOT;
a0d0e21e 1040 }
934dcd01 1041 if (PL_delaymagic & DM_ARRAY)
ad64d0ec 1042 SvSETMAGIC(MUTABLE_SV(ary));
a0d0e21e 1043 break;
10c8fecd 1044 case SVt_PVHV: { /* normal hash */
a0d0e21e
LW
1045 SV *tmpstr;
1046
85fbaab2 1047 hash = MUTABLE_HV(sv);
748a9306 1048 magic = SvMAGICAL(hash) != 0;
a0d0e21e 1049 hv_clear(hash);
ca65944e 1050 firsthashrelem = relem;
a0d0e21e
LW
1051
1052 while (relem < lastrelem) { /* gobble up all the rest */
5117ca91 1053 HE *didstore;
6136c704
AL
1054 sv = *relem ? *relem : &PL_sv_no;
1055 relem++;
561b68a9 1056 tmpstr = newSV(0);
a0d0e21e
LW
1057 if (*relem)
1058 sv_setsv(tmpstr,*relem); /* value */
1059 *(relem++) = tmpstr;
ca65944e
RGS
1060 if (gimme != G_VOID && hv_exists_ent(hash, sv, 0))
1061 /* key overwrites an existing entry */
1062 duplicates += 2;
5117ca91
GS
1063 didstore = hv_store_ent(hash,sv,tmpstr,0);
1064 if (magic) {
90630e3c
VP
1065 if (SvSMAGICAL(tmpstr)) {
1066 U16 dmbak = PL_delaymagic;
1067 PL_delaymagic = 0;
fb73857a 1068 mg_set(tmpstr);
90630e3c
VP
1069 PL_delaymagic = dmbak;
1070 }
5117ca91 1071 if (!didstore)
8127e0e3 1072 sv_2mortal(tmpstr);
5117ca91 1073 }
bbce6d69 1074 TAINT_NOT;
8e07c86e 1075 }
6a0deba8 1076 if (relem == lastrelem) {
10c8fecd 1077 do_oddball(hash, relem, firstrelem);
6a0deba8 1078 relem++;
1930e939 1079 }
a0d0e21e
LW
1080 }
1081 break;
1082 default:
6fc92669
GS
1083 if (SvIMMORTAL(sv)) {
1084 if (relem <= lastrelem)
1085 relem++;
1086 break;
a0d0e21e
LW
1087 }
1088 if (relem <= lastrelem) {
1089 sv_setsv(sv, *relem);
1090 *(relem++) = sv;
1091 }
1092 else
3280af22 1093 sv_setsv(sv, &PL_sv_undef);
90630e3c
VP
1094
1095 if (SvSMAGICAL(sv)) {
1096 U16 dmbak = PL_delaymagic;
1097 PL_delaymagic = 0;
1098 mg_set(sv);
1099 PL_delaymagic = dmbak;
1100 }
a0d0e21e
LW
1101 break;
1102 }
1103 }
3280af22
NIS
1104 if (PL_delaymagic & ~DM_DELAY) {
1105 if (PL_delaymagic & DM_UID) {
a0d0e21e 1106#ifdef HAS_SETRESUID
fb934a90
RD
1107 (void)setresuid((PL_delaymagic & DM_RUID) ? PL_uid : (Uid_t)-1,
1108 (PL_delaymagic & DM_EUID) ? PL_euid : (Uid_t)-1,
1109 (Uid_t)-1);
56febc5e
AD
1110#else
1111# ifdef HAS_SETREUID
fb934a90
RD
1112 (void)setreuid((PL_delaymagic & DM_RUID) ? PL_uid : (Uid_t)-1,
1113 (PL_delaymagic & DM_EUID) ? PL_euid : (Uid_t)-1);
56febc5e
AD
1114# else
1115# ifdef HAS_SETRUID
b28d0864
NIS
1116 if ((PL_delaymagic & DM_UID) == DM_RUID) {
1117 (void)setruid(PL_uid);
1118 PL_delaymagic &= ~DM_RUID;
a0d0e21e 1119 }
56febc5e
AD
1120# endif /* HAS_SETRUID */
1121# ifdef HAS_SETEUID
b28d0864 1122 if ((PL_delaymagic & DM_UID) == DM_EUID) {
fb934a90 1123 (void)seteuid(PL_euid);
b28d0864 1124 PL_delaymagic &= ~DM_EUID;
a0d0e21e 1125 }
56febc5e 1126# endif /* HAS_SETEUID */
b28d0864
NIS
1127 if (PL_delaymagic & DM_UID) {
1128 if (PL_uid != PL_euid)
cea2e8a9 1129 DIE(aTHX_ "No setreuid available");
b28d0864 1130 (void)PerlProc_setuid(PL_uid);
a0d0e21e 1131 }
56febc5e
AD
1132# endif /* HAS_SETREUID */
1133#endif /* HAS_SETRESUID */
d8eceb89
JH
1134 PL_uid = PerlProc_getuid();
1135 PL_euid = PerlProc_geteuid();
a0d0e21e 1136 }
3280af22 1137 if (PL_delaymagic & DM_GID) {
a0d0e21e 1138#ifdef HAS_SETRESGID
fb934a90
RD
1139 (void)setresgid((PL_delaymagic & DM_RGID) ? PL_gid : (Gid_t)-1,
1140 (PL_delaymagic & DM_EGID) ? PL_egid : (Gid_t)-1,
1141 (Gid_t)-1);
56febc5e
AD
1142#else
1143# ifdef HAS_SETREGID
fb934a90
RD
1144 (void)setregid((PL_delaymagic & DM_RGID) ? PL_gid : (Gid_t)-1,
1145 (PL_delaymagic & DM_EGID) ? PL_egid : (Gid_t)-1);
56febc5e
AD
1146# else
1147# ifdef HAS_SETRGID
b28d0864
NIS
1148 if ((PL_delaymagic & DM_GID) == DM_RGID) {
1149 (void)setrgid(PL_gid);
1150 PL_delaymagic &= ~DM_RGID;
a0d0e21e 1151 }
56febc5e
AD
1152# endif /* HAS_SETRGID */
1153# ifdef HAS_SETEGID
b28d0864 1154 if ((PL_delaymagic & DM_GID) == DM_EGID) {
fb934a90 1155 (void)setegid(PL_egid);
b28d0864 1156 PL_delaymagic &= ~DM_EGID;
a0d0e21e 1157 }
56febc5e 1158# endif /* HAS_SETEGID */
b28d0864
NIS
1159 if (PL_delaymagic & DM_GID) {
1160 if (PL_gid != PL_egid)
cea2e8a9 1161 DIE(aTHX_ "No setregid available");
b28d0864 1162 (void)PerlProc_setgid(PL_gid);
a0d0e21e 1163 }
56febc5e
AD
1164# endif /* HAS_SETREGID */
1165#endif /* HAS_SETRESGID */
d8eceb89
JH
1166 PL_gid = PerlProc_getgid();
1167 PL_egid = PerlProc_getegid();
a0d0e21e 1168 }
3280af22 1169 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
a0d0e21e 1170 }
3280af22 1171 PL_delaymagic = 0;
54310121 1172
54310121
PP
1173 if (gimme == G_VOID)
1174 SP = firstrelem - 1;
1175 else if (gimme == G_SCALAR) {
1176 dTARGET;
1177 SP = firstrelem;
ca65944e 1178 SETi(lastrelem - firstrelem + 1 - duplicates);
54310121
PP
1179 }
1180 else {
ca65944e 1181 if (ary)
a0d0e21e 1182 SP = lastrelem;
ca65944e
RGS
1183 else if (hash) {
1184 if (duplicates) {
1185 /* Removes from the stack the entries which ended up as
1186 * duplicated keys in the hash (fix for [perl #24380]) */
1187 Move(firsthashrelem + duplicates,
1188 firsthashrelem, duplicates, SV**);
1189 lastrelem -= duplicates;
1190 }
1191 SP = lastrelem;
1192 }
a0d0e21e
LW
1193 else
1194 SP = firstrelem + (lastlelem - firstlelem);
0c8c7a05 1195 lelem = firstlelem + (relem - firstrelem);
5f05dabc 1196 while (relem <= SP)
3280af22 1197 *relem++ = (lelem <= lastlelem) ? *lelem++ : &PL_sv_undef;
a0d0e21e 1198 }
08aeb9f7 1199
54310121 1200 RETURN;
a0d0e21e
LW
1201}
1202
8782bef2
GB
1203PP(pp_qr)
1204{
97aff369 1205 dVAR; dSP;
c4420975 1206 register PMOP * const pm = cPMOP;
fe578d7f 1207 REGEXP * rx = PM_GETRE(pm);
10599a69 1208 SV * const pkg = rx ? CALLREG_PACKAGE(rx) : NULL;
c4420975 1209 SV * const rv = sv_newmortal();
288b8c02
NC
1210
1211 SvUPGRADE(rv, SVt_IV);
c2123ae3
NC
1212 /* For a subroutine describing itself as "This is a hacky workaround" I'm
1213 loathe to use it here, but it seems to be the right fix. Or close.
1214 The key part appears to be that it's essential for pp_qr to return a new
1215 object (SV), which implies that there needs to be an effective way to
1216 generate a new SV from the existing SV that is pre-compiled in the
1217 optree. */
1218 SvRV_set(rv, MUTABLE_SV(reg_temp_copy(NULL, rx)));
288b8c02
NC
1219 SvROK_on(rv);
1220
1221 if (pkg) {
1222 HV* const stash = gv_stashpv(SvPV_nolen(pkg), GV_ADD);
a954f6ee 1223 SvREFCNT_dec(pkg);
288b8c02
NC
1224 (void)sv_bless(rv, stash);
1225 }
1226
07bc277f 1227 if (RX_EXTFLAGS(rx) & RXf_TAINTED)
e08e52cf 1228 SvTAINTED_on(rv);
c8c13c22 1229 XPUSHs(rv);
1230 RETURN;
8782bef2
GB
1231}
1232
a0d0e21e
LW
1233PP(pp_match)
1234{
97aff369 1235 dVAR; dSP; dTARG;
a0d0e21e 1236 register PMOP *pm = cPMOP;
d65afb4b 1237 PMOP *dynpm = pm;
0d46e09a
SP
1238 register const char *t;
1239 register const char *s;
5c144d81 1240 const char *strend;
a0d0e21e 1241 I32 global;
1ed74d04 1242 U8 r_flags = REXEC_CHECKED;
5c144d81 1243 const char *truebase; /* Start of string */
aaa362c4 1244 register REGEXP *rx = PM_GETRE(pm);
b3eb6a9b 1245 bool rxtainted;
a3b680e6 1246 const I32 gimme = GIMME;
a0d0e21e 1247 STRLEN len;
748a9306 1248 I32 minmatch = 0;
a3b680e6 1249 const I32 oldsave = PL_savestack_ix;
f86702cc 1250 I32 update_minmatch = 1;
e60df1fa 1251 I32 had_zerolen = 0;
58e23c8d 1252 U32 gpos = 0;
a0d0e21e 1253
533c011a 1254 if (PL_op->op_flags & OPf_STACKED)
a0d0e21e 1255 TARG = POPs;
59f00321
RGS
1256 else if (PL_op->op_private & OPpTARGET_MY)
1257 GETTARGET;
a0d0e21e 1258 else {
54b9620d 1259 TARG = DEFSV;
a0d0e21e
LW
1260 EXTEND(SP,1);
1261 }
d9f424b2 1262
c277df42 1263 PUTBACK; /* EVAL blocks need stack_sp. */
69dc4b30
FC
1264 /* Skip get-magic if this is a qr// clone, because regcomp has
1265 already done it. */
1266 s = ((struct regexp *)SvANY(rx))->mother_re
1267 ? SvPV_nomg_const(TARG, len)
1268 : SvPV_const(TARG, len);
a0d0e21e 1269 if (!s)
2269b42e 1270 DIE(aTHX_ "panic: pp_match");
890ce7af 1271 strend = s + len;
07bc277f 1272 rxtainted = ((RX_EXTFLAGS(rx) & RXf_TAINTED) ||
3280af22 1273 (PL_tainted && (pm->op_pmflags & PMf_RETAINT)));
9212bbba 1274 TAINT_NOT;
a0d0e21e 1275
a30b2f1f 1276 RX_MATCH_UTF8_set(rx, DO_UTF8(TARG));
d9f424b2 1277
d65afb4b 1278 /* PMdf_USED is set after a ?? matches once */
c737faaf
YO
1279 if (
1280#ifdef USE_ITHREADS
1281 SvREADONLY(PL_regex_pad[pm->op_pmoffset])
1282#else
1283 pm->op_pmflags & PMf_USED
1284#endif
1285 ) {
c277df42 1286 failure:
a0d0e21e
LW
1287 if (gimme == G_ARRAY)
1288 RETURN;
1289 RETPUSHNO;
1290 }
1291
c737faaf
YO
1292
1293
d65afb4b 1294 /* empty pattern special-cased to use last successful pattern if possible */
220fc49f 1295 if (!RX_PRELEN(rx) && PL_curpm) {
3280af22 1296 pm = PL_curpm;
aaa362c4 1297 rx = PM_GETRE(pm);
a0d0e21e 1298 }
d65afb4b 1299
07bc277f 1300 if (RX_MINLEN(rx) > (I32)len)
d65afb4b 1301 goto failure;
c277df42 1302
a0d0e21e 1303 truebase = t = s;
ad94a511
IZ
1304
1305 /* XXXX What part of this is needed with true \G-support? */
d65afb4b 1306 if ((global = dynpm->op_pmflags & PMf_GLOBAL)) {
07bc277f 1307 RX_OFFS(rx)[0].start = -1;
a0d0e21e 1308 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
c445ea15 1309 MAGIC* const mg = mg_find(TARG, PERL_MAGIC_regex_global);
565764a8 1310 if (mg && mg->mg_len >= 0) {
07bc277f
NC
1311 if (!(RX_EXTFLAGS(rx) & RXf_GPOS_SEEN))
1312 RX_OFFS(rx)[0].end = RX_OFFS(rx)[0].start = mg->mg_len;
1313 else if (RX_EXTFLAGS(rx) & RXf_ANCH_GPOS) {
0ef3e39e 1314 r_flags |= REXEC_IGNOREPOS;
07bc277f
NC
1315 RX_OFFS(rx)[0].end = RX_OFFS(rx)[0].start = mg->mg_len;
1316 } else if (RX_EXTFLAGS(rx) & RXf_GPOS_FLOAT)
58e23c8d
YO
1317 gpos = mg->mg_len;
1318 else
07bc277f
NC
1319 RX_OFFS(rx)[0].end = RX_OFFS(rx)[0].start = mg->mg_len;
1320 minmatch = (mg->mg_flags & MGf_MINMATCH) ? RX_GOFS(rx) + 1 : 0;
f86702cc 1321 update_minmatch = 0;
748a9306 1322 }
a0d0e21e
LW
1323 }
1324 }
a229a030 1325 /* XXX: comment out !global get safe $1 vars after a
62e7980d 1326 match, BUT be aware that this leads to dramatic slowdowns on
a229a030
YO
1327 /g matches against large strings. So far a solution to this problem
1328 appears to be quite tricky.
1329 Test for the unsafe vars are TODO for now. */
07bc277f 1330 if (( !global && RX_NPARENS(rx))
cde0cee5 1331 || SvTEMP(TARG) || PL_sawampersand ||
07bc277f 1332 (RX_EXTFLAGS(rx) & (RXf_EVAL_SEEN|RXf_PMf_KEEPCOPY)))
14977893 1333 r_flags |= REXEC_COPY_STR;
1c846c1f 1334 if (SvSCREAM(TARG))
22e551b9
IZ
1335 r_flags |= REXEC_SCREAM;
1336
a0d0e21e 1337play_it_again:
07bc277f
NC
1338 if (global && RX_OFFS(rx)[0].start != -1) {
1339 t = s = RX_OFFS(rx)[0].end + truebase - RX_GOFS(rx);
1340 if ((s + RX_MINLEN(rx)) > strend || s < truebase)
a0d0e21e 1341 goto nope;
f86702cc 1342 if (update_minmatch++)
e60df1fa 1343 minmatch = had_zerolen;
a0d0e21e 1344 }
07bc277f 1345 if (RX_EXTFLAGS(rx) & RXf_USE_INTUIT &&
3c8556c3 1346 DO_UTF8(TARG) == (RX_UTF8(rx) != 0)) {
5c144d81
NC
1347 /* FIXME - can PL_bostr be made const char *? */
1348 PL_bostr = (char *)truebase;
f9f4320a 1349 s = CALLREG_INTUIT_START(rx, TARG, (char *)s, (char *)strend, r_flags, NULL);
f722798b
IZ
1350
1351 if (!s)
1352 goto nope;
07bc277f 1353 if ( (RX_EXTFLAGS(rx) & RXf_CHECK_ALL)
14977893 1354 && !PL_sawampersand
07bc277f
NC
1355 && !(RX_EXTFLAGS(rx) & RXf_PMf_KEEPCOPY)
1356 && ((RX_EXTFLAGS(rx) & RXf_NOSCAN)
1357 || !((RX_EXTFLAGS(rx) & RXf_INTUIT_TAIL)
05b4157f
GS
1358 && (r_flags & REXEC_SCREAM)))
1359 && !SvROK(TARG)) /* Cannot trust since INTUIT cannot guess ^ */
f722798b 1360 goto yup;
a0d0e21e 1361 }
1f36f092
RB
1362 if (CALLREGEXEC(rx, (char*)s, (char *)strend, (char*)truebase,
1363 minmatch, TARG, NUM2PTR(void*, gpos), r_flags))
bbce6d69 1364 {
3280af22 1365 PL_curpm = pm;
c737faaf
YO
1366 if (dynpm->op_pmflags & PMf_ONCE) {
1367#ifdef USE_ITHREADS
1368 SvREADONLY_on(PL_regex_pad[dynpm->op_pmoffset]);
1369#else
1370 dynpm->op_pmflags |= PMf_USED;
1371#endif
1372 }
a0d0e21e
LW
1373 goto gotcha;
1374 }
1375 else
1376 goto ret_no;
1377 /*NOTREACHED*/
1378
1379 gotcha:
72311751
GS
1380 if (rxtainted)
1381 RX_MATCH_TAINTED_on(rx);
1382 TAINT_IF(RX_MATCH_TAINTED(rx));
a0d0e21e 1383 if (gimme == G_ARRAY) {
07bc277f 1384 const I32 nparens = RX_NPARENS(rx);
a3b680e6 1385 I32 i = (global && !nparens) ? 1 : 0;
a0d0e21e 1386
c277df42 1387 SPAGAIN; /* EVAL blocks could move the stack. */
ffc61ed2
JH
1388 EXTEND(SP, nparens + i);
1389 EXTEND_MORTAL(nparens + i);
1390 for (i = !i; i <= nparens; i++) {
a0d0e21e 1391 PUSHs(sv_newmortal());
07bc277f
NC
1392 if ((RX_OFFS(rx)[i].start != -1) && RX_OFFS(rx)[i].end != -1 ) {
1393 const I32 len = RX_OFFS(rx)[i].end - RX_OFFS(rx)[i].start;
1394 s = RX_OFFS(rx)[i].start + truebase;
1395 if (RX_OFFS(rx)[i].end < 0 || RX_OFFS(rx)[i].start < 0 ||
290deeac
A
1396 len < 0 || len > strend - s)
1397 DIE(aTHX_ "panic: pp_match start/end pointers");
a0d0e21e 1398 sv_setpvn(*SP, s, len);
cce850e4 1399 if (DO_UTF8(TARG) && is_utf8_string((U8*)s, len))
a197cbdd 1400 SvUTF8_on(*SP);
a0d0e21e
LW
1401 }
1402 }
1403 if (global) {
d65afb4b 1404 if (dynpm->op_pmflags & PMf_CONTINUE) {
6136c704 1405 MAGIC* mg = NULL;
0af80b60
HS
1406 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG))
1407 mg = mg_find(TARG, PERL_MAGIC_regex_global);
1408 if (!mg) {
d83f0a82
NC
1409#ifdef PERL_OLD_COPY_ON_WRITE
1410 if (SvIsCOW(TARG))
1411 sv_force_normal_flags(TARG, 0);
1412#endif
1413 mg = sv_magicext(TARG, NULL, PERL_MAGIC_regex_global,
1414 &PL_vtbl_mglob, NULL, 0);
0af80b60 1415 }
07bc277f
NC
1416 if (RX_OFFS(rx)[0].start != -1) {
1417 mg->mg_len = RX_OFFS(rx)[0].end;
1418 if (RX_OFFS(rx)[0].start + RX_GOFS(rx) == (UV)RX_OFFS(rx)[0].end)
0af80b60
HS
1419 mg->mg_flags |= MGf_MINMATCH;
1420 else
1421 mg->mg_flags &= ~MGf_MINMATCH;
1422 }
1423 }
07bc277f
NC
1424 had_zerolen = (RX_OFFS(rx)[0].start != -1
1425 && (RX_OFFS(rx)[0].start + RX_GOFS(rx)
1426 == (UV)RX_OFFS(rx)[0].end));
c277df42 1427 PUTBACK; /* EVAL blocks may use stack */
cf93c79d 1428 r_flags |= REXEC_IGNOREPOS | REXEC_NOT_FIRST;
a0d0e21e
LW
1429 goto play_it_again;
1430 }
ffc61ed2 1431 else if (!nparens)
bde848c5 1432 XPUSHs(&PL_sv_yes);
4633a7c4 1433 LEAVE_SCOPE(oldsave);
a0d0e21e
LW
1434 RETURN;
1435 }
1436 else {
1437 if (global) {
cbbf8932 1438 MAGIC* mg;
a0d0e21e 1439 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG))
14befaf4 1440 mg = mg_find(TARG, PERL_MAGIC_regex_global);
cbbf8932
AL
1441 else
1442 mg = NULL;
a0d0e21e 1443 if (!mg) {
d83f0a82
NC
1444#ifdef PERL_OLD_COPY_ON_WRITE
1445 if (SvIsCOW(TARG))
1446 sv_force_normal_flags(TARG, 0);
1447#endif
1448 mg = sv_magicext(TARG, NULL, PERL_MAGIC_regex_global,
1449 &PL_vtbl_mglob, NULL, 0);
a0d0e21e 1450 }
07bc277f
NC
1451 if (RX_OFFS(rx)[0].start != -1) {
1452 mg->mg_len = RX_OFFS(rx)[0].end;
1453 if (RX_OFFS(rx)[0].start + RX_GOFS(rx) == (UV)RX_OFFS(rx)[0].end)
748a9306
LW
1454 mg->mg_flags |= MGf_MINMATCH;
1455 else
1456 mg->mg_flags &= ~MGf_MINMATCH;
1457 }
a0d0e21e 1458 }
4633a7c4 1459 LEAVE_SCOPE(oldsave);
a0d0e21e
LW
1460 RETPUSHYES;
1461 }
1462
f722798b 1463yup: /* Confirmed by INTUIT */
72311751
GS
1464 if (rxtainted)
1465 RX_MATCH_TAINTED_on(rx);
1466 TAINT_IF(RX_MATCH_TAINTED(rx));
3280af22 1467 PL_curpm = pm;
c737faaf
YO
1468 if (dynpm->op_pmflags & PMf_ONCE) {
1469#ifdef USE_ITHREADS
1470 SvREADONLY_on(PL_regex_pad[dynpm->op_pmoffset]);
1471#else
1472 dynpm->op_pmflags |= PMf_USED;
1473#endif
1474 }
cf93c79d 1475 if (RX_MATCH_COPIED(rx))
07bc277f 1476 Safefree(RX_SUBBEG(rx));
cf93c79d 1477 RX_MATCH_COPIED_off(rx);
07bc277f 1478 RX_SUBBEG(rx) = NULL;
a0d0e21e 1479 if (global) {
5c144d81 1480 /* FIXME - should rx->subbeg be const char *? */
07bc277f
NC
1481 RX_SUBBEG(rx) = (char *) truebase;
1482 RX_OFFS(rx)[0].start = s - truebase;
a30b2f1f 1483 if (RX_MATCH_UTF8(rx)) {
07bc277f
NC
1484 char * const t = (char*)utf8_hop((U8*)s, RX_MINLENRET(rx));
1485 RX_OFFS(rx)[0].end = t - truebase;
60aeb6fd
NIS
1486 }
1487 else {
07bc277f 1488 RX_OFFS(rx)[0].end = s - truebase + RX_MINLENRET(rx);
60aeb6fd 1489 }
07bc277f 1490 RX_SUBLEN(rx) = strend - truebase;
a0d0e21e 1491 goto gotcha;
1c846c1f 1492 }
07bc277f 1493 if (PL_sawampersand || RX_EXTFLAGS(rx) & RXf_PMf_KEEPCOPY) {
14977893 1494 I32 off;
f8c7b90f 1495#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
1496 if (SvIsCOW(TARG) || (SvFLAGS(TARG) & CAN_COW_MASK) == CAN_COW_FLAGS) {
1497 if (DEBUG_C_TEST) {
1498 PerlIO_printf(Perl_debug_log,
1499 "Copy on write: pp_match $& capture, type %d, truebase=%p, t=%p, difference %d\n",
6c9570dc 1500 (int) SvTYPE(TARG), (void*)truebase, (void*)t,
ed252734
NC
1501 (int)(t-truebase));
1502 }
bdd9a1b1
NC
1503 RX_SAVED_COPY(rx) = sv_setsv_cow(RX_SAVED_COPY(rx), TARG);
1504 RX_SUBBEG(rx)
1505 = (char *) SvPVX_const(RX_SAVED_COPY(rx)) + (t - truebase);
1506 assert (SvPOKp(RX_SAVED_COPY(rx)));
ed252734
NC
1507 } else
1508#endif
1509 {
14977893 1510
07bc277f 1511 RX_SUBBEG(rx) = savepvn(t, strend - t);
f8c7b90f 1512#ifdef PERL_OLD_COPY_ON_WRITE
bdd9a1b1 1513 RX_SAVED_COPY(rx) = NULL;
ed252734
NC
1514#endif
1515 }
07bc277f 1516 RX_SUBLEN(rx) = strend - t;
14977893 1517 RX_MATCH_COPIED_on(rx);
07bc277f
NC
1518 off = RX_OFFS(rx)[0].start = s - t;
1519 RX_OFFS(rx)[0].end = off + RX_MINLENRET(rx);
14977893
JH
1520 }
1521 else { /* startp/endp are used by @- @+. */
07bc277f
NC
1522 RX_OFFS(rx)[0].start = s - truebase;
1523 RX_OFFS(rx)[0].end = s - truebase + RX_MINLENRET(rx);
14977893 1524 }
07bc277f 1525 /* including RX_NPARENS(rx) in the below code seems highly suspicious.
cde0cee5 1526 -dmq */
07bc277f 1527 RX_NPARENS(rx) = RX_LASTPAREN(rx) = RX_LASTCLOSEPAREN(rx) = 0; /* used by @-, @+, and $^N */
4633a7c4 1528 LEAVE_SCOPE(oldsave);
a0d0e21e
LW
1529 RETPUSHYES;
1530
1531nope:
a0d0e21e 1532ret_no:
d65afb4b 1533 if (global && !(dynpm->op_pmflags & PMf_CONTINUE)) {
a0d0e21e 1534 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
6136c704 1535 MAGIC* const mg = mg_find(TARG, PERL_MAGIC_regex_global);
a0d0e21e 1536 if (mg)
565764a8 1537 mg->mg_len = -1;
a0d0e21e
LW
1538 }
1539 }
4633a7c4 1540 LEAVE_SCOPE(oldsave);
a0d0e21e
LW
1541 if (gimme == G_ARRAY)
1542 RETURN;
1543 RETPUSHNO;
1544}
1545
1546OP *
864dbfa3 1547Perl_do_readline(pTHX)
a0d0e21e 1548{
27da23d5 1549 dVAR; dSP; dTARGETSTACKED;
a0d0e21e
LW
1550 register SV *sv;
1551 STRLEN tmplen = 0;
1552 STRLEN offset;
760ac839 1553 PerlIO *fp;
a3b680e6
AL
1554 register IO * const io = GvIO(PL_last_in_gv);
1555 register const I32 type = PL_op->op_type;
1556 const I32 gimme = GIMME_V;
a0d0e21e 1557
6136c704 1558 if (io) {
ad64d0ec 1559 MAGIC * const mg = SvTIED_mg((const SV *)io, PERL_MAGIC_tiedscalar);
6136c704
AL
1560 if (mg) {
1561 PUSHMARK(SP);
ad64d0ec 1562 XPUSHs(SvTIED_obj(MUTABLE_SV(io), mg));
6136c704 1563 PUTBACK;
d343c3ef 1564 ENTER_with_name("call_READLINE");
6136c704 1565 call_method("READLINE", gimme);
d343c3ef 1566 LEAVE_with_name("call_READLINE");
6136c704
AL
1567 SPAGAIN;
1568 if (gimme == G_SCALAR) {
1569 SV* const result = POPs;
1570 SvSetSV_nosteal(TARG, result);
1571 PUSHTARG;
1572 }
1573 RETURN;
0b7c7b4f 1574 }
e79b0511 1575 }
4608196e 1576 fp = NULL;
a0d0e21e
LW
1577 if (io) {
1578 fp = IoIFP(io);
1579 if (!fp) {
1580 if (IoFLAGS(io) & IOf_ARGV) {
1581 if (IoFLAGS(io) & IOf_START) {
a0d0e21e 1582 IoLINES(io) = 0;
3280af22 1583 if (av_len(GvAVn(PL_last_in_gv)) < 0) {
1d7c1841 1584 IoFLAGS(io) &= ~IOf_START;
4608196e 1585 do_open(PL_last_in_gv,"-",1,FALSE,O_RDONLY,0,NULL);
76f68e9b 1586 sv_setpvs(GvSVn(PL_last_in_gv), "-");
3280af22 1587 SvSETMAGIC(GvSV(PL_last_in_gv));
a2008d6d
GS
1588 fp = IoIFP(io);
1589 goto have_fp;
a0d0e21e
LW
1590 }
1591 }
3280af22 1592 fp = nextargv(PL_last_in_gv);
a0d0e21e 1593 if (!fp) { /* Note: fp != IoIFP(io) */
3280af22 1594 (void)do_close(PL_last_in_gv, FALSE); /* now it does*/
a0d0e21e
LW
1595 }
1596 }
0d44d22b
NC
1597 else if (type == OP_GLOB)
1598 fp = Perl_start_glob(aTHX_ POPs, io);
a0d0e21e
LW
1599 }
1600 else if (type == OP_GLOB)
1601 SP--;
a00b5bd3 1602 else if (ckWARN(WARN_IO) && IoTYPE(io) == IoTYPE_WRONLY) {
4c80c0b2 1603 report_evil_fh(PL_last_in_gv, io, OP_phoney_OUTPUT_ONLY);
a00b5bd3 1604 }
a0d0e21e
LW
1605 }
1606 if (!fp) {
041457d9
DM
1607 if ((!io || !(IoFLAGS(io) & IOf_START))
1608 && ckWARN2(WARN_GLOB, WARN_CLOSED))
1609 {
3f4520fe 1610 if (type == OP_GLOB)
9014280d 1611 Perl_warner(aTHX_ packWARN(WARN_GLOB),
af8c498a
GS
1612 "glob failed (can't start child: %s)",
1613 Strerror(errno));
69282e91 1614 else
bc37a18f 1615 report_evil_fh(PL_last_in_gv, io, PL_op->op_type);
3f4520fe 1616 }
54310121 1617 if (gimme == G_SCALAR) {
79628082 1618 /* undef TARG, and push that undefined value */
ba92458f
AE
1619 if (type != OP_RCATLINE) {
1620 SV_CHECK_THINKFIRST_COW_DROP(TARG);
0c34ef67 1621 SvOK_off(TARG);
ba92458f 1622 }
a0d0e21e
LW
1623 PUSHTARG;
1624 }
1625 RETURN;
1626 }
a2008d6d 1627 have_fp:
54310121 1628 if (gimme == G_SCALAR) {
a0d0e21e 1629 sv = TARG;
0f722b55
RGS
1630 if (type == OP_RCATLINE && SvGMAGICAL(sv))
1631 mg_get(sv);
48de12d9
RGS
1632 if (SvROK(sv)) {
1633 if (type == OP_RCATLINE)
1634 SvPV_force_nolen(sv);
1635 else
1636 sv_unref(sv);
1637 }
f7877b28
NC
1638 else if (isGV_with_GP(sv)) {
1639 SvPV_force_nolen(sv);
1640 }
862a34c6 1641 SvUPGRADE(sv, SVt_PV);
a0d0e21e 1642 tmplen = SvLEN(sv); /* remember if already alloced */
bc44a8a2 1643 if (!tmplen && !SvREADONLY(sv))
a0d0e21e 1644 Sv_Grow(sv, 80); /* try short-buffering it */
2b5e58c4
AMS
1645 offset = 0;
1646 if (type == OP_RCATLINE && SvOK(sv)) {
1647 if (!SvPOK(sv)) {
8b6b16e7 1648 SvPV_force_nolen(sv);
2b5e58c4 1649 }
a0d0e21e 1650 offset = SvCUR(sv);
2b5e58c4 1651 }
a0d0e21e 1652 }
54310121 1653 else {
561b68a9 1654 sv = sv_2mortal(newSV(80));
54310121
PP
1655 offset = 0;
1656 }
fbad3eb5 1657
3887d568
AP
1658 /* This should not be marked tainted if the fp is marked clean */
1659#define MAYBE_TAINT_LINE(io, sv) \
1660 if (!(IoFLAGS(io) & IOf_UNTAINT)) { \
1661 TAINT; \
1662 SvTAINTED_on(sv); \
1663 }
1664
684bef36 1665/* delay EOF state for a snarfed empty file */
fbad3eb5 1666#define SNARF_EOF(gimme,rs,io,sv) \
684bef36 1667 (gimme != G_SCALAR || SvCUR(sv) \
b9fee9ba 1668 || (IoFLAGS(io) & IOf_NOLINE) || !RsSNARF(rs))
fbad3eb5 1669
a0d0e21e 1670 for (;;) {
09e8efcc 1671 PUTBACK;
fbad3eb5 1672 if (!sv_gets(sv, fp, offset)
2d726892
TF
1673 && (type == OP_GLOB
1674 || SNARF_EOF(gimme, PL_rs, io, sv)
1675 || PerlIO_error(fp)))
fbad3eb5 1676 {
760ac839 1677 PerlIO_clearerr(fp);
a0d0e21e 1678 if (IoFLAGS(io) & IOf_ARGV) {
3280af22 1679 fp = nextargv(PL_last_in_gv);
a0d0e21e
LW
1680 if (fp)
1681 continue;
3280af22 1682 (void)do_close(PL_last_in_gv, FALSE);
a0d0e21e
LW
1683 }
1684 else if (type == OP_GLOB) {
a2a5de95
NC
1685 if (!do_close(PL_last_in_gv, FALSE)) {
1686 Perl_ck_warner(aTHX_ packWARN(WARN_GLOB),
1687 "glob failed (child exited with status %d%s)",
1688 (int)(STATUS_CURRENT >> 8),
1689 (STATUS_CURRENT & 0x80) ? ", core dumped" : "");
4eb79ab5 1690 }
a0d0e21e 1691 }
54310121 1692 if (gimme == G_SCALAR) {
ba92458f
AE
1693 if (type != OP_RCATLINE) {
1694 SV_CHECK_THINKFIRST_COW_DROP(TARG);
0c34ef67 1695 SvOK_off(TARG);
ba92458f 1696 }
09e8efcc 1697 SPAGAIN;
a0d0e21e
LW
1698 PUSHTARG;
1699 }
3887d568 1700 MAYBE_TAINT_LINE(io, sv);
a0d0e21e
LW
1701 RETURN;
1702 }
3887d568 1703 MAYBE_TAINT_LINE(io, sv);
a0d0e21e 1704 IoLINES(io)++;
b9fee9ba 1705 IoFLAGS(io) |= IOf_NOLINE;
71be2cbc 1706 SvSETMAGIC(sv);
09e8efcc 1707 SPAGAIN;
a0d0e21e 1708 XPUSHs(sv);
a0d0e21e 1709 if (type == OP_GLOB) {
349d4f2f 1710 const char *t1;
a0d0e21e 1711
3280af22 1712 if (SvCUR(sv) > 0 && SvCUR(PL_rs) > 0) {
6136c704 1713 char * const tmps = SvEND(sv) - 1;
aa07b2f6 1714 if (*tmps == *SvPVX_const(PL_rs)) {
c07a80fd 1715 *tmps = '\0';
b162af07 1716 SvCUR_set(sv, SvCUR(sv) - 1);
c07a80fd
PP
1717 }
1718 }
349d4f2f
NC
1719 for (t1 = SvPVX_const(sv); *t1; t1++)
1720 if (!isALPHA(*t1) && !isDIGIT(*t1) &&
1721 strchr("$&*(){}[]'\";\\|?<>~`", *t1))
a0d0e21e 1722 break;
349d4f2f 1723 if (*t1 && PerlLIO_lstat(SvPVX_const(sv), &PL_statbuf) < 0) {
a0d0e21e
LW
1724 (void)POPs; /* Unmatched wildcard? Chuck it... */
1725 continue;
1726 }
2d79bf7f 1727 } else if (SvUTF8(sv)) { /* OP_READLINE, OP_RCATLINE */
d4c19fe8
AL
1728 if (ckWARN(WARN_UTF8)) {
1729 const U8 * const s = (const U8*)SvPVX_const(sv) + offset;
1730 const STRLEN len = SvCUR(sv) - offset;
1731 const U8 *f;
1732
1733 if (!is_utf8_string_loc(s, len, &f))
1734 /* Emulate :encoding(utf8) warning in the same case. */
1735 Perl_warner(aTHX_ packWARN(WARN_UTF8),
1736 "utf8 \"\\x%02X\" does not map to Unicode",
1737 f < (U8*)SvEND(sv) ? *f : 0);
1738 }
a0d0e21e 1739 }
54310121 1740 if (gimme == G_ARRAY) {
a0d0e21e 1741 if (SvLEN(sv) - SvCUR(sv) > 20) {
1da4ca5f 1742 SvPV_shrink_to_cur(sv);
a0d0e21e 1743 }
561b68a9 1744 sv = sv_2mortal(newSV(80));
a0d0e21e
LW
1745 continue;
1746 }
54310121 1747 else if (gimme == G_SCALAR && !tmplen && SvLEN(sv) - SvCUR(sv) > 80) {
a0d0e21e 1748 /* try to reclaim a bit of scalar space (only on 1st alloc) */
d5b5861b
NC
1749 const STRLEN new_len
1750 = SvCUR(sv) < 60 ? 80 : SvCUR(sv)+40; /* allow some slop */
1da4ca5f 1751 SvPV_renew(sv, new_len);
a0d0e21e
LW
1752 }
1753 RETURN;
1754 }
1755}
1756
1757PP(pp_enter)
1758{
27da23d5 1759 dVAR; dSP;
c09156bb 1760 register PERL_CONTEXT *cx;
533c011a 1761 I32 gimme = OP_GIMME(PL_op, -1);
a0d0e21e 1762
54310121 1763 if (gimme == -1) {
e91684bf
VP
1764 if (cxstack_ix >= 0) {
1765 /* If this flag is set, we're just inside a return, so we should
1766 * store the caller's context */
1767 gimme = (PL_op->op_flags & OPf_SPECIAL)
1768 ? block_gimme()
1769 : cxstack[cxstack_ix].blk_gimme;
1770 } else
54310121
PP
1771 gimme = G_SCALAR;
1772 }
a0d0e21e 1773
d343c3ef 1774 ENTER_with_name("block");
a0d0e21e
LW
1775
1776 SAVETMPS;
924508f0 1777 PUSHBLOCK(cx, CXt_BLOCK, SP);
a0d0e21e
LW
1778
1779 RETURN;
1780}
1781
1782PP(pp_helem)
1783{
97aff369 1784 dVAR; dSP;
760ac839 1785 HE* he;
ae77835f 1786 SV **svp;
c445ea15 1787 SV * const keysv = POPs;
85fbaab2 1788 HV * const hv = MUTABLE_HV(POPs);
a3b680e6
AL
1789 const U32 lval = PL_op->op_flags & OPf_MOD || LVRET;
1790 const U32 defer = PL_op->op_private & OPpLVAL_DEFER;
be6c24e0 1791 SV *sv;
c158a4fd 1792 const U32 hash = (SvIsCOW_shared_hash(keysv)) ? SvSHARED_HASH(keysv) : 0;
92970b93 1793 const bool localizing = PL_op->op_private & OPpLVAL_INTRO;
d30e492c 1794 bool preeminent = TRUE;
a0d0e21e 1795
d4c19fe8 1796 if (SvTYPE(hv) != SVt_PVHV)
a0d0e21e 1797 RETPUSHUNDEF;
d4c19fe8 1798
92970b93 1799 if (localizing) {
d4c19fe8
AL
1800 MAGIC *mg;
1801 HV *stash;
d30e492c
VP
1802
1803 /* If we can determine whether the element exist,
1804 * Try to preserve the existenceness of a tied hash
1805 * element by using EXISTS and DELETE if possible.
1806 * Fallback to FETCH and STORE otherwise. */
1807 if (SvCANEXISTDELETE(hv) || mg_find((const SV *)hv, PERL_MAGIC_env))
1808 preeminent = hv_exists_ent(hv, keysv, 0);
d4c19fe8 1809 }
d30e492c 1810
d4c19fe8
AL
1811 he = hv_fetch_ent(hv, keysv, lval && !defer, hash);
1812 svp = he ? &HeVAL(he) : NULL;
a0d0e21e 1813 if (lval) {
3280af22 1814 if (!svp || *svp == &PL_sv_undef) {
68dc0745
PP
1815 SV* lv;
1816 SV* key2;
2d8e6c8d 1817 if (!defer) {
be2597df 1818 DIE(aTHX_ PL_no_helem_sv, SVfARG(keysv));
2d8e6c8d 1819 }
68dc0745
PP
1820 lv = sv_newmortal();
1821 sv_upgrade(lv, SVt_PVLV);
1822 LvTYPE(lv) = 'y';
6136c704 1823 sv_magic(lv, key2 = newSVsv(keysv), PERL_MAGIC_defelem, NULL, 0);
68dc0745 1824 SvREFCNT_dec(key2); /* sv_magic() increments refcount */
b37c2d43 1825 LvTARG(lv) = SvREFCNT_inc_simple(hv);
68dc0745
PP
1826 LvTARGLEN(lv) = 1;
1827 PUSHs(lv);
1828 RETURN;
1829 }
92970b93 1830 if (localizing) {
bfcb3514 1831 if (HvNAME_get(hv) && isGV(*svp))
159b6efe 1832 save_gp(MUTABLE_GV(*svp), !(PL_op->op_flags & OPf_SPECIAL));
47cfc530
VP
1833 else if (preeminent)
1834 save_helem_flags(hv, keysv, svp,
1835 (PL_op->op_flags & OPf_SPECIAL) ? 0 : SAVEf_SETMAGIC);
1836 else
1837 SAVEHDELETE(hv, keysv);
5f05dabc 1838 }
533c011a
NIS
1839 else if (PL_op->op_private & OPpDEREF)
1840 vivify_ref(*svp, PL_op->op_private & OPpDEREF);
a0d0e21e 1841 }
3280af22 1842 sv = (svp ? *svp : &PL_sv_undef);
be6c24e0
GS
1843 /* This makes C<local $tied{foo} = $tied{foo}> possible.
1844 * Pushing the magical RHS on to the stack is useless, since
1845 * that magic is soon destined to be misled by the local(),
1846 * and thus the later pp_sassign() will fail to mg_get() the
1847 * old value. This should also cure problems with delayed
1848 * mg_get()s. GSAR 98-07-03 */
1849 if (!lval && SvGMAGICAL(sv))
1850 sv = sv_mortalcopy(sv);
1851 PUSHs(sv);
a0d0e21e
LW
1852 RETURN;
1853}
1854
1855PP(pp_leave)
1856{
27da23d5 1857 dVAR; dSP;
c09156bb 1858 register PERL_CONTEXT *cx;
a0d0e21e
LW
1859 SV **newsp;
1860 PMOP *newpm;
1861 I32 gimme;
1862
533c011a 1863 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e 1864 cx = &cxstack[cxstack_ix];
3280af22 1865 cx->blk_oldpm = PL_curpm; /* fake block should preserve $1 et al */
a0d0e21e
LW
1866 }
1867
1868 POPBLOCK(cx,newpm);
1869
e91684bf 1870 gimme = OP_GIMME(PL_op, (cxstack_ix >= 0) ? gimme : G_SCALAR);
a0d0e21e 1871
a1f49e72 1872 TAINT_NOT;
54310121
PP
1873 if (gimme == G_VOID)
1874 SP = newsp;
1875 else if (gimme == G_SCALAR) {
a3b680e6 1876 register SV **mark;
54310121 1877 MARK = newsp + 1;
09256e2f 1878 if (MARK <= SP) {
54310121
PP
1879 if (SvFLAGS(TOPs) & (SVs_PADTMP|SVs_TEMP))
1880 *MARK = TOPs;
1881 else
1882 *MARK = sv_mortalcopy(TOPs);
09256e2f 1883 } else {
54310121 1884 MEXTEND(mark,0);
3280af22 1885 *MARK = &PL_sv_undef;
a0d0e21e 1886 }
54310121 1887 SP = MARK;
a0d0e21e 1888 }
54310121 1889 else if (gimme == G_ARRAY) {
a1f49e72 1890 /* in case LEAVE wipes old return values */
a3b680e6 1891 register SV **mark;
a1f49e72
CS
1892 for (mark = newsp + 1; mark <= SP; mark++) {
1893 if (!(SvFLAGS(*mark) & (SVs_PADTMP|SVs_TEMP))) {
a0d0e21e 1894 *mark = sv_mortalcopy(*mark);
a1f49e72
CS
1895 TAINT_NOT; /* Each item is independent */
1896 }
1897 }
a0d0e21e 1898 }
3280af22 1899 PL_curpm = newpm; /* Don't pop $1 et al till now */
a0d0e21e 1900
d343c3ef 1901 LEAVE_with_name("block");
a0d0e21e
LW
1902
1903 RETURN;
1904}
1905
1906PP(pp_iter)
1907{
97aff369 1908 dVAR; dSP;
c09156bb 1909 register PERL_CONTEXT *cx;
dc09a129 1910 SV *sv, *oldsv;
1d7c1841 1911 SV **itersvp;
d01136d6
BS
1912 AV *av = NULL; /* used for LOOP_FOR on arrays and the stack */
1913 bool av_is_stack = FALSE;
a0d0e21e 1914
924508f0 1915 EXTEND(SP, 1);
a0d0e21e 1916 cx = &cxstack[cxstack_ix];
3b719c58 1917 if (!CxTYPE_is_LOOP(cx))
cea2e8a9 1918 DIE(aTHX_ "panic: pp_iter");
a0d0e21e 1919
1d7c1841 1920 itersvp = CxITERVAR(cx);
d01136d6 1921 if (CxTYPE(cx) == CXt_LOOP_LAZYSV) {
89ea2908 1922 /* string increment */
d01136d6
BS
1923 SV* cur = cx->blk_loop.state_u.lazysv.cur;
1924 SV *end = cx->blk_loop.state_u.lazysv.end;
267cc4a8
NC
1925 /* If the maximum is !SvOK(), pp_enteriter substitutes PL_sv_no.
1926 It has SvPVX of "" and SvCUR of 0, which is what we want. */
4fe3f0fa 1927 STRLEN maxlen = 0;
d01136d6 1928 const char *max = SvPV_const(end, maxlen);
89ea2908 1929 if (!SvNIOK(cur) && SvCUR(cur) <= maxlen) {
1d7c1841 1930 if (SvREFCNT(*itersvp) == 1 && !SvMAGICAL(*itersvp)) {
eaa5c2d6 1931 /* safe to reuse old SV */
1d7c1841 1932 sv_setsv(*itersvp, cur);
eaa5c2d6 1933 }
1c846c1f 1934 else
eaa5c2d6
GA
1935 {
1936 /* we need a fresh SV every time so that loop body sees a
1937 * completely new SV for closures/references to work as
1938 * they used to */
dc09a129 1939 oldsv = *itersvp;
1d7c1841 1940 *itersvp = newSVsv(cur);
dc09a129 1941 SvREFCNT_dec(oldsv);
eaa5c2d6 1942 }
aa07b2f6 1943 if (strEQ(SvPVX_const(cur), max))
89ea2908
GA
1944 sv_setiv(cur, 0); /* terminate next time */
1945 else
1946 sv_inc(cur);
1947 RETPUSHYES;
1948 }
1949 RETPUSHNO;
d01136d6
BS
1950 }
1951 else if (CxTYPE(cx) == CXt_LOOP_LAZYIV) {
89ea2908 1952 /* integer increment */
d01136d6 1953 if (cx->blk_loop.state_u.lazyiv.cur > cx->blk_loop.state_u.lazyiv.end)
89ea2908 1954 RETPUSHNO;
7f61b687 1955
3db8f154 1956 /* don't risk potential race */
1d7c1841 1957 if (SvREFCNT(*itersvp) == 1 && !SvMAGICAL(*itersvp)) {
eaa5c2d6 1958 /* safe to reuse old SV */
d01136d6 1959 sv_setiv(*itersvp, cx->blk_loop.state_u.lazyiv.cur++);
eaa5c2d6 1960 }
1c846c1f 1961 else
eaa5c2d6
GA
1962 {
1963 /* we need a fresh SV every time so that loop body sees a
1964 * completely new SV for closures/references to work as they
1965 * used to */
dc09a129 1966 oldsv = *itersvp;
d01136d6 1967 *itersvp = newSViv(cx->blk_loop.state_u.lazyiv.cur++);
dc09a129 1968 SvREFCNT_dec(oldsv);
eaa5c2d6 1969 }
a2309040
JH
1970
1971 /* Handle end of range at IV_MAX */
d01136d6
BS
1972 if ((cx->blk_loop.state_u.lazyiv.cur == IV_MIN) &&
1973 (cx->blk_loop.state_u.lazyiv.end == IV_MAX))
a2309040 1974 {
d01136d6
BS
1975 cx->blk_loop.state_u.lazyiv.cur++;
1976 cx->blk_loop.state_u.lazyiv.end++;
a2309040
JH
1977 }
1978
89ea2908
GA
1979 RETPUSHYES;
1980 }
1981
1982 /* iterate array */
d01136d6
BS
1983 assert(CxTYPE(cx) == CXt_LOOP_FOR);
1984 av = cx->blk_loop.state_u.ary.ary;
1985 if (!av) {
1986 av_is_stack = TRUE;
1987 av = PL_curstack;
1988 }
ef3e5ea9 1989 if (PL_op->op_private & OPpITER_REVERSED) {
d01136d6
BS
1990 if (cx->blk_loop.state_u.ary.ix <= (av_is_stack
1991 ? cx->blk_loop.resetsp + 1 : 0))
ef3e5ea9 1992 RETPUSHNO;
a0d0e21e 1993
ef3e5ea9 1994 if (SvMAGICAL(av) || AvREIFY(av)) {
d01136d6 1995 SV * const * const svp = av_fetch(av, --cx->blk_loop.state_u.ary.ix, FALSE);
a0714e2c 1996 sv = svp ? *svp : NULL;
ef3e5ea9
NC
1997 }
1998 else {
d01136d6 1999 sv = AvARRAY(av)[--cx->blk_loop.state_u.ary.ix];
ef3e5ea9 2000 }
d42935ef
JH
2001 }
2002 else {
d01136d6 2003 if (cx->blk_loop.state_u.ary.ix >= (av_is_stack ? cx->blk_oldsp :
ef3e5ea9
NC
2004 AvFILL(av)))
2005 RETPUSHNO;
2006
2007 if (SvMAGICAL(av) || AvREIFY(av)) {
d01136d6 2008 SV * const * const svp = av_fetch(av, ++cx->blk_loop.state_u.ary.ix, FALSE);
a0714e2c 2009 sv = svp ? *svp : NULL;
ef3e5ea9
NC
2010 }
2011 else {
d01136d6 2012 sv = AvARRAY(av)[++cx->blk_loop.state_u.ary.ix];
ef3e5ea9 2013 }
d42935ef 2014 }
ef3e5ea9 2015
0565a181 2016 if (sv && SvIS_FREED(sv)) {
a0714e2c 2017 *itersvp = NULL;
b6c83531 2018 Perl_croak(aTHX_ "Use of freed value in iteration");
cccede53
DM
2019 }
2020
d01136d6 2021 if (sv) {
a0d0e21e 2022 SvTEMP_off(sv);
d01136d6
BS
2023 SvREFCNT_inc_simple_void_NN(sv);
2024 }
a0d0e21e 2025 else
3280af22 2026 sv = &PL_sv_undef;
d01136d6
BS
2027 if (!av_is_stack && sv == &PL_sv_undef) {
2028 SV *lv = newSV_type(SVt_PVLV);
2029 LvTYPE(lv) = 'y';
2030 sv_magic(lv, NULL, PERL_MAGIC_defelem, NULL, 0);
b37c2d43 2031 LvTARG(lv) = SvREFCNT_inc_simple(av);
d01136d6 2032 LvTARGOFF(lv) = cx->blk_loop.state_u.ary.ix;
42718184 2033 LvTARGLEN(lv) = (STRLEN)UV_MAX;
d01136d6 2034 sv = lv;
5f05dabc 2035 }
a0d0e21e 2036
dc09a129 2037 oldsv = *itersvp;
d01136d6 2038 *itersvp = sv;
dc09a129
DM
2039 SvREFCNT_dec(oldsv);
2040
a0d0e21e
LW
2041 RETPUSHYES;
2042}
2043
2044PP(pp_subst)
2045{
97aff369 2046 dVAR; dSP; dTARG;
a0d0e21e
LW
2047 register PMOP *pm = cPMOP;
2048 PMOP *rpm = pm;
a0d0e21e
LW
2049 register char *s;
2050 char *strend;
2051 register char *m;
5c144d81 2052 const char *c;
a0d0e21e
LW
2053 register char *d;
2054 STRLEN clen;
2055 I32 iters = 0;
2056 I32 maxiters;
2057 register I32 i;
2058 bool once;
99710fe3 2059 U8 rxtainted;
a0d0e21e 2060 char *orig;
1ed74d04 2061 U8 r_flags;
aaa362c4 2062 register REGEXP *rx = PM_GETRE(pm);
a0d0e21e
LW
2063 STRLEN len;
2064 int force_on_match = 0;
0bcc34c2 2065 const I32 oldsave = PL_savestack_ix;
792b2c16 2066 STRLEN slen;
f272994b 2067 bool doutf8 = FALSE;
10300be4 2068 I32 matched;
f8c7b90f 2069#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
2070 bool is_cow;
2071#endif
a0714e2c 2072 SV *nsv = NULL;
a0d0e21e 2073
5cd24f17 2074 /* known replacement string? */
b37c2d43 2075 register SV *dstr = (pm->op_pmflags & PMf_CONST) ? POPs : NULL;
533c011a 2076 if (PL_op->op_flags & OPf_STACKED)
a0d0e21e 2077 TARG = POPs;
59f00321
RGS
2078 else if (PL_op->op_private & OPpTARGET_MY)
2079 GETTARGET;
a0d0e21e 2080 else {
54b9620d 2081 TARG = DEFSV;
a0d0e21e 2082 EXTEND(SP,1);
1c846c1f 2083 }
d9f424b2 2084
f8c7b90f 2085#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
2086 /* Awooga. Awooga. "bool" types that are actually char are dangerous,
2087 because they make integers such as 256 "false". */
2088 is_cow = SvIsCOW(TARG) ? TRUE : FALSE;
2089#else
765f542d
NC
2090 if (SvIsCOW(TARG))
2091 sv_force_normal_flags(TARG,0);
ed252734
NC
2092#endif
2093 if (
f8c7b90f 2094#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
2095 !is_cow &&
2096#endif
2097 (SvREADONLY(TARG)
cecf5685
NC
2098 || ( ((SvTYPE(TARG) == SVt_PVGV && isGV_with_GP(TARG))
2099 || SvTYPE(TARG) > SVt_PVLV)
4ce457a6 2100 && !(SvTYPE(TARG) == SVt_PVGV && SvFAKE(TARG)))))
f1f66076 2101 DIE(aTHX_ "%s", PL_no_modify);
8ec5e241
NIS
2102 PUTBACK;
2103
d5263905 2104 s = SvPV_mutable(TARG, len);
68dc0745 2105 if (!SvPOKp(TARG) || SvTYPE(TARG) == SVt_PVGV)
a0d0e21e 2106 force_on_match = 1;
07bc277f 2107 rxtainted = ((RX_EXTFLAGS(rx) & RXf_TAINTED) ||
3280af22
NIS
2108 (PL_tainted && (pm->op_pmflags & PMf_RETAINT)));
2109 if (PL_tainted)
b3eb6a9b 2110 rxtainted |= 2;
9212bbba 2111 TAINT_NOT;
a12c0f56 2112
a30b2f1f 2113 RX_MATCH_UTF8_set(rx, DO_UTF8(TARG));
d9f424b2 2114
a0d0e21e
LW
2115 force_it:
2116 if (!pm || !s)
2269b42e 2117 DIE(aTHX_ "panic: pp_subst");
a0d0e21e
LW
2118
2119 strend = s + len;
a30b2f1f 2120 slen = RX_MATCH_UTF8(rx) ? utf8_length((U8*)s, (U8*)strend) : len;
792b2c16
JH
2121 maxiters = 2 * slen + 10; /* We can match twice at each
2122 position, once with zero-length,
2123 second time with non-zero. */
a0d0e21e 2124
220fc49f 2125 if (!RX_PRELEN(rx) && PL_curpm) {
3280af22 2126 pm = PL_curpm;
aaa362c4 2127 rx = PM_GETRE(pm);
a0d0e21e 2128 }
07bc277f
NC
2129 r_flags = (RX_NPARENS(rx) || SvTEMP(TARG) || PL_sawampersand
2130 || (RX_EXTFLAGS(rx) & (RXf_EVAL_SEEN|RXf_PMf_KEEPCOPY)) )
ed252734 2131 ? REXEC_COPY_STR : 0;
f722798b 2132 if (SvSCREAM(TARG))
22e551b9 2133 r_flags |= REXEC_SCREAM;
7fba1cd6 2134
a0d0e21e 2135 orig = m = s;
07bc277f 2136 if (RX_EXTFLAGS(rx) & RXf_USE_INTUIT) {
ee0b7718 2137 PL_bostr = orig;
f9f4320a 2138 s = CALLREG_INTUIT_START(rx, TARG, s, strend, r_flags, NULL);
f722798b
IZ
2139
2140 if (!s)
2141 goto nope;
2142 /* How to do it in subst? */
07bc277f 2143/* if ( (RX_EXTFLAGS(rx) & RXf_CHECK_ALL)
1c846c1f 2144 && !PL_sawampersand
07bc277f
NC
2145 && !(RX_EXTFLAGS(rx) & RXf_KEEPCOPY)
2146 && ((RX_EXTFLAGS(rx) & RXf_NOSCAN)
2147 || !((RX_EXTFLAGS(rx) & RXf_INTUIT_TAIL)
f722798b
IZ
2148 && (r_flags & REXEC_SCREAM))))
2149 goto yup;
2150*/
a0d0e21e 2151 }
71be2cbc
PP
2152
2153 /* only replace once? */
a0d0e21e 2154 once = !(rpm->op_pmflags & PMf_GLOBAL);
10300be4
YO
2155 matched = CALLREGEXEC(rx, s, strend, orig, 0, TARG, NULL,
2156 r_flags | REXEC_CHECKED);
71be2cbc 2157 /* known replacement string? */
f272994b 2158 if (dstr) {
8514a05a
JH
2159 /* replacement needing upgrading? */
2160 if (DO_UTF8(TARG) && !doutf8) {
db79b45b 2161 nsv = sv_newmortal();
4a176938 2162 SvSetSV(nsv, dstr);
8514a05a
JH
2163 if (PL_encoding)
2164 sv_recode_to_utf8(nsv, PL_encoding);
2165 else
2166 sv_utf8_upgrade(nsv);
5c144d81 2167 c = SvPV_const(nsv, clen);
4a176938
JH
2168 doutf8 = TRUE;
2169 }
2170 else {
5c144d81 2171 c = SvPV_const(dstr, clen);
4a176938 2172 doutf8 = DO_UTF8(dstr);
8514a05a 2173 }
f272994b
A
2174 }
2175 else {
6136c704 2176 c = NULL;
f272994b
A
2177 doutf8 = FALSE;
2178 }
2179
71be2cbc 2180 /* can do inplace substitution? */
ed252734 2181 if (c
f8c7b90f 2182#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
2183 && !is_cow
2184#endif
07bc277f
NC
2185 && (I32)clen <= RX_MINLENRET(rx) && (once || !(r_flags & REXEC_COPY_STR))
2186 && !(RX_EXTFLAGS(rx) & RXf_LOOKBEHIND_SEEN)
db79b45b 2187 && (!doutf8 || SvUTF8(TARG))) {
10300be4 2188 if (!matched)
f722798b 2189 {
8ec5e241 2190 SPAGAIN;
3280af22 2191 PUSHs(&PL_sv_no);
71be2cbc
PP
2192 LEAVE_SCOPE(oldsave);
2193 RETURN;
2194 }
f8c7b90f 2195#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
2196 if (SvIsCOW(TARG)) {
2197 assert (!force_on_match);
2198 goto have_a_cow;
2199 }
2200#endif
71be2cbc
PP
2201 if (force_on_match) {
2202 force_on_match = 0;
2203 s = SvPV_force(TARG, len);
2204 goto force_it;
2205 }
71be2cbc 2206 d = s;
3280af22 2207 PL_curpm = pm;
71be2cbc
PP
2208 SvSCREAM_off(TARG); /* disable possible screamer */
2209 if (once) {
48c036b1 2210 rxtainted |= RX_MATCH_TAINTED(rx);
07bc277f
NC
2211 m = orig + RX_OFFS(rx)[0].start;
2212 d = orig + RX_OFFS(rx)[0].end;
71be2cbc
PP
2213 s = orig;
2214 if (m - s > strend - d) { /* faster to shorten from end */
2215 if (clen) {
2216 Copy(c, m, clen, char);
2217 m += clen;
a0d0e21e 2218 }
71be2cbc
PP
2219 i = strend - d;
2220 if (i > 0) {
2221 Move(d, m, i, char);
2222 m += i;
a0d0e21e 2223 }
71be2cbc
PP
2224 *m = '\0';
2225 SvCUR_set(TARG, m - s);
2226 }
155aba94 2227 else if ((i = m - s)) { /* faster from front */
71be2cbc
PP
2228 d -= clen;
2229 m = d;
0d3c21b0 2230 Move(s, d - i, i, char);
71be2cbc 2231 sv_chop(TARG, d-i);
71be2cbc
PP
2232 if (clen)
2233 Copy(c, m, clen, char);
2234 }
2235 else if (clen) {
2236 d -= clen;
2237 sv_chop(TARG, d);
2238 Copy(c, d, clen, char);
2239 }
2240 else {
2241 sv_chop(TARG, d);
2242 }
48c036b1 2243 TAINT_IF(rxtainted & 1);
8ec5e241 2244 SPAGAIN;
3280af22 2245 PUSHs(&PL_sv_yes);
71be2cbc
PP
2246 }
2247 else {
71be2cbc
PP
2248 do {
2249 if (iters++ > maxiters)
cea2e8a9 2250 DIE(aTHX_ "Substitution loop");
d9f97599 2251 rxtainted |= RX_MATCH_TAINTED(rx);
07bc277f 2252 m = RX_OFFS(rx)[0].start + orig;
155aba94 2253 if ((i = m - s)) {
71be2cbc
PP
2254 if (s != d)
2255 Move(s, d, i, char);
2256 d += i;
a0d0e21e 2257 }
71be2cbc
PP
2258 if (clen) {
2259 Copy(c, d, clen, char);
2260 d += clen;
2261 }
07bc277f 2262 s = RX_OFFS(rx)[0].end + orig;
f9f4320a 2263 } while (CALLREGEXEC(rx, s, strend, orig, s == m,
f722798b
IZ
2264 TARG, NULL,
2265 /* don't match same null twice */
2266 REXEC_NOT_FIRST|REXEC_IGNOREPOS));
71be2cbc
PP
2267 if (s != d) {
2268 i = strend - s;
aa07b2f6 2269 SvCUR_set(TARG, d - SvPVX_const(TARG) + i);
71be2cbc 2270 Move(s, d, i+1, char); /* include the NUL */
a0d0e21e 2271 }
48c036b1 2272 TAINT_IF(rxtainted & 1);
8ec5e241 2273 SPAGAIN;
6e449a3a 2274 mPUSHi((I32)iters);
a0d0e21e 2275 }
80b498e0 2276 (void)SvPOK_only_UTF8(TARG);
48c036b1 2277 TAINT_IF(rxtainted);
8ec5e241
NIS
2278 if (SvSMAGICAL(TARG)) {
2279 PUTBACK;
2280 mg_set(TARG);
2281 SPAGAIN;
2282 }
9212bbba 2283 SvTAINT(TARG);
aefe6dfc
JH
2284 if (doutf8)
2285 SvUTF8_on(TARG);
71be2cbc
PP
2286 LEAVE_SCOPE(oldsave);
2287 RETURN;
a0d0e21e 2288 }
71be2cbc 2289
10300be4 2290 if (matched)
f722798b 2291 {
a0d0e21e
LW
2292 if (force_on_match) {
2293 force_on_match = 0;
2294 s = SvPV_force(TARG, len);
2295 goto force_it;
2296 }
f8c7b90f 2297#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
2298 have_a_cow:
2299#endif
48c036b1 2300 rxtainted |= RX_MATCH_TAINTED(rx);
740cce10 2301 dstr = newSVpvn_utf8(m, s-m, DO_UTF8(TARG));
cff085c1 2302 SAVEFREESV(dstr);
3280af22 2303 PL_curpm = pm;
a0d0e21e 2304 if (!c) {
c09156bb 2305 register PERL_CONTEXT *cx;
8ec5e241 2306 SPAGAIN;
a0d0e21e 2307 PUSHSUBST(cx);
20e98b0f 2308 RETURNOP(cPMOP->op_pmreplrootu.op_pmreplroot);
a0d0e21e 2309 }
cf93c79d 2310 r_flags |= REXEC_IGNOREPOS | REXEC_NOT_FIRST;
a0d0e21e
LW
2311 do {
2312 if (iters++ > maxiters)
cea2e8a9 2313 DIE(aTHX_ "Substitution loop");
d9f97599 2314 rxtainted |= RX_MATCH_TAINTED(rx);
07bc277f 2315 if (RX_MATCH_COPIED(rx) && RX_SUBBEG(rx) != orig) {
a0d0e21e
LW
2316 m = s;
2317 s = orig;
07bc277f 2318 orig = RX_SUBBEG(rx);
a0d0e21e
LW
2319 s = orig + (m - s);
2320 strend = s + (strend - m);
2321 }
07bc277f 2322 m = RX_OFFS(rx)[0].start + orig;
db79b45b
JH
2323 if (doutf8 && !SvUTF8(dstr))
2324 sv_catpvn_utf8_upgrade(dstr, s, m - s, nsv);
2325 else
2326 sv_catpvn(dstr, s, m-s);
07bc277f 2327 s = RX_OFFS(rx)[0].end + orig;
a0d0e21e
LW
2328 if (clen)
2329 sv_catpvn(dstr, c, clen);
2330 if (once)
2331 break;
f9f4320a 2332 } while (CALLREGEXEC(rx, s, strend, orig, s == m,
ffc61ed2 2333 TARG, NULL, r_flags));
db79b45b
JH
2334 if (doutf8 && !DO_UTF8(TARG))
2335 sv_catpvn_utf8_upgrade(dstr, s, strend - s, nsv);
89afcb60
A
2336 else
2337 sv_catpvn(dstr, s, strend - s);
748a9306 2338
f8c7b90f 2339#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
2340 /* The match may make the string COW. If so, brilliant, because that's
2341 just saved us one malloc, copy and free - the regexp has donated
2342 the old buffer, and we malloc an entirely new one, rather than the
2343 regexp malloc()ing a buffer and copying our original, only for
2344 us to throw it away here during the substitution. */
2345 if (SvIsCOW(TARG)) {
2346 sv_force_normal_flags(TARG, SV_COW_DROP_PV);
2347 } else
2348#endif
2349 {
8bd4d4c5 2350 SvPV_free(TARG);
ed252734 2351 }
f880fe2f 2352 SvPV_set(TARG, SvPVX(dstr));
748a9306
LW
2353 SvCUR_set(TARG, SvCUR(dstr));
2354 SvLEN_set(TARG, SvLEN(dstr));
f272994b 2355 doutf8 |= DO_UTF8(dstr);
6136c704 2356 SvPV_set(dstr, NULL);
748a9306 2357
48c036b1 2358 TAINT_IF(rxtainted & 1);
f878fbec 2359 SPAGAIN;
6e449a3a 2360 mPUSHi((I32)iters);
48c036b1 2361
a0d0e21e 2362 (void)SvPOK_only(TARG);
f272994b 2363 if (doutf8)
60aeb6fd 2364 SvUTF8_on(TARG);
48c036b1 2365 TAINT_IF(rxtainted);
a0d0e21e 2366 SvSETMAGIC(TARG);
9212bbba 2367 SvTAINT(TARG);
4633a7c4 2368 LEAVE_SCOPE(oldsave);
a0d0e21e
LW
2369 RETURN;
2370 }
5cd24f17 2371 goto ret_no;
a0d0e21e
LW
2372
2373nope:
1c846c1f 2374ret_no:
8ec5e241 2375 SPAGAIN;
3280af22 2376 PUSHs(&PL_sv_no);
4633a7c4 2377 LEAVE_SCOPE(oldsave);
a0d0e21e
LW
2378 RETURN;
2379}
2380
2381PP(pp_grepwhile)
2382{
27da23d5 2383 dVAR; dSP;
a0d0e21e
LW
2384
2385 if (SvTRUEx(POPs))
3280af22
NIS
2386 PL_stack_base[PL_markstack_ptr[-1]++] = PL_stack_base[*PL_markstack_ptr];
2387 ++*PL_markstack_ptr;
d343c3ef 2388 LEAVE_with_name("grep_item"); /* exit inner scope */
a0d0e21e
LW
2389
2390 /* All done yet? */
3280af22 2391 if (PL_stack_base + *PL_markstack_ptr > SP) {
a0d0e21e 2392 I32 items;
c4420975 2393 const I32 gimme = GIMME_V;
a0d0e21e 2394
d343c3ef 2395 LEAVE_with_name("grep"); /* exit outer scope */
a0d0e21e 2396 (void)POPMARK; /* pop src */
3280af22 2397 items = --*PL_markstack_ptr - PL_markstack_ptr[-1];
a0d0e21e 2398 (void)POPMARK; /* pop dst */
3280af22 2399 SP = PL_stack_base + POPMARK; /* pop original mark */
54310121 2400 if (gimme == G_SCALAR) {
7cc47870 2401 if (PL_op->op_private & OPpGREP_LEX) {
c4420975 2402 SV* const sv = sv_newmortal();
7cc47870
RGS
2403 sv_setiv(sv, items);
2404 PUSHs(sv);
2405 }
2406 else {
2407 dTARGET;
2408 XPUSHi(items);
2409 }
a0d0e21e 2410 }
54310121
PP
2411 else if (gimme == G_ARRAY)
2412 SP += items;
a0d0e21e
LW
2413 RETURN;
2414 }
2415 else {
2416 SV *src;
2417
d343c3ef 2418 ENTER_with_name("grep_item"); /* enter inner scope */
1d7c1841 2419 SAVEVPTR(PL_curpm);
a0d0e21e 2420
3280af22 2421 src = PL_stack_base[*PL_markstack_ptr];
a0d0e21e 2422 SvTEMP_off(src);
59f00321
RGS
2423 if (PL_op->op_private & OPpGREP_LEX)
2424 PAD_SVl(PL_op->op_targ) = src;
2425 else
414bf5ae 2426 DEFSV_set(src);
a0d0e21e
LW
2427
2428 RETURNOP(cLOGOP->op_other);
2429 }
2430}
2431
2432PP(pp_leavesub)
2433{
27da23d5 2434 dVAR; dSP;
a0d0e21e
LW
2435 SV **mark;
2436 SV **newsp;
2437 PMOP *newpm;
2438 I32 gimme;
c09156bb 2439 register PERL_CONTEXT *cx;
b0d9ce38 2440 SV *sv;
a0d0e21e 2441
9850bf21
RH
2442 if (CxMULTICALL(&cxstack[cxstack_ix]))
2443 return 0;
2444
a0d0e21e 2445 POPBLOCK(cx,newpm);
5dd42e15 2446 cxstack_ix++; /* temporarily protect top context */
1c846c1f 2447
a1f49e72 2448 TAINT_NOT;
a0d0e21e
LW
2449 if (gimme == G_SCALAR) {
2450 MARK = newsp + 1;
a29cdaf0 2451 if (MARK <= SP) {
a8bba7fa 2452 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
a29cdaf0
IZ
2453 if (SvTEMP(TOPs)) {
2454 *MARK = SvREFCNT_inc(TOPs);
2455 FREETMPS;
2456 sv_2mortal(*MARK);
cd06dffe
GS
2457 }
2458 else {
959e3673 2459 sv = SvREFCNT_inc(TOPs); /* FREETMPS could clobber it */
a29cdaf0 2460 FREETMPS;
959e3673
GS
2461 *MARK = sv_mortalcopy(sv);
2462 SvREFCNT_dec(sv);
a29cdaf0 2463 }
cd06dffe
GS
2464 }
2465 else
a29cdaf0 2466 *MARK = SvTEMP(TOPs) ? TOPs : sv_mortalcopy(TOPs);
cd06dffe
GS
2467 }
2468 else {
f86702cc 2469 MEXTEND(MARK, 0);
3280af22 2470 *MARK = &PL_sv_undef;
a0d0e21e
LW
2471 }
2472 SP = MARK;
2473 }
54310121 2474 else if (gimme == G_ARRAY) {
f86702cc 2475 for (MARK = newsp + 1; MARK <= SP; MARK++) {
a1f49e72 2476 if (!SvTEMP(*MARK)) {
f86702cc 2477 *MARK = sv_mortalcopy(*MARK);
a1f49e72
CS
2478 TAINT_NOT; /* Each item is independent */
2479 }
f86702cc 2480 }
a0d0e21e 2481 }
f86702cc 2482 PUTBACK;
1c846c1f 2483
a57c6685 2484 LEAVE;
5dd42e15 2485 cxstack_ix--;
b0d9ce38 2486 POPSUB(cx,sv); /* Stack values are safe: release CV and @_ ... */
3280af22 2487 PL_curpm = newpm; /* ... and pop $1 et al */
a0d0e21e 2488
b0d9ce38 2489 LEAVESUB(sv);
f39bc417 2490 return cx->blk_sub.retop;
a0d0e21e
LW
2491}
2492
cd06dffe
GS
2493/* This duplicates the above code because the above code must not
2494 * get any slower by more conditions */
2495PP(pp_leavesublv)
2496{
27da23d5 2497 dVAR; dSP;
cd06dffe
GS
2498 SV **mark;
2499 SV **newsp;
2500 PMOP *newpm;
2501 I32 gimme;
2502 register PERL_CONTEXT *cx;
b0d9ce38 2503 SV *sv;
cd06dffe 2504
9850bf21
RH
2505 if (CxMULTICALL(&cxstack[cxstack_ix]))
2506 return 0;
2507
cd06dffe 2508 POPBLOCK(cx,newpm);
5dd42e15 2509 cxstack_ix++; /* temporarily protect top context */
1c846c1f 2510
cd06dffe
GS
2511 TAINT_NOT;
2512
bafb2adc 2513 if (CxLVAL(cx) & OPpENTERSUB_INARGS) {
cd06dffe
GS
2514 /* We are an argument to a function or grep().
2515 * This kind of lvalueness was legal before lvalue
2516 * subroutines too, so be backward compatible:
2517 * cannot report errors. */
2518
2519 /* Scalar context *is* possible, on the LHS of -> only,
2520 * as in f()->meth(). But this is not an lvalue. */
2521 if (gimme == G_SCALAR)
2522 goto temporise;
2523 if (gimme == G_ARRAY) {
a8bba7fa 2524 if (!CvLVALUE(cx->blk_sub.cv))
cd06dffe
GS
2525 goto temporise_array;
2526 EXTEND_MORTAL(SP - newsp);
2527 for (mark = newsp + 1; mark <= SP; mark++) {
2528 if (SvTEMP(*mark))
6f207bd3 2529 NOOP;
cd06dffe
GS
2530 else if (SvFLAGS(*mark) & (SVs_PADTMP | SVf_READONLY))
2531 *mark = sv_mortalcopy(*mark);
2532 else {
2533 /* Can be a localized value subject to deletion. */
2534 PL_tmps_stack[++PL_tmps_ix] = *mark;
b37c2d43 2535 SvREFCNT_inc_void(*mark);
cd06dffe
GS
2536 }
2537 }
2538 }
2539 }
bafb2adc 2540 else if (CxLVAL(cx)) { /* Leave it as it is if we can. */
cd06dffe
GS
2541 /* Here we go for robustness, not for speed, so we change all
2542 * the refcounts so the caller gets a live guy. Cannot set
2543 * TEMP, so sv_2mortal is out of question. */
a8bba7fa 2544 if (!CvLVALUE(cx->blk_sub.cv)) {
a57c6685 2545 LEAVE;
5dd42e15 2546 cxstack_ix--;
b0d9ce38 2547 POPSUB(cx,sv);
d470f89e 2548 PL_curpm = newpm;
b0d9ce38 2549 LEAVESUB(sv);
d470f89e
GS
2550 DIE(aTHX_ "Can't modify non-lvalue subroutine call");
2551 }
cd06dffe
GS
2552 if (gimme == G_SCALAR) {
2553 MARK = newsp + 1;
2554 EXTEND_MORTAL(1);
2555 if (MARK == SP) {
f9bc45ef
TP
2556 /* Temporaries are bad unless they happen to be elements
2557 * of a tied hash or array */
2558 if (SvFLAGS(TOPs) & (SVs_TEMP | SVs_PADTMP | SVf_READONLY) &&
2559 !(SvRMAGICAL(TOPs) && mg_find(TOPs, PERL_MAGIC_tiedelem))) {
a57c6685 2560 LEAVE;
5dd42e15 2561 cxstack_ix--;
b0d9ce38 2562 POPSUB(cx,sv);
d470f89e 2563 PL_curpm = newpm;
b0d9ce38 2564 LEAVESUB(sv);
e9f19e3c
HS
2565 DIE(aTHX_ "Can't return %s from lvalue subroutine",
2566 SvREADONLY(TOPs) ? (TOPs == &PL_sv_undef) ? "undef"
2567 : "a readonly value" : "a temporary");
d470f89e 2568 }
cd06dffe
GS
2569 else { /* Can be a localized value
2570 * subject to deletion. */
2571 PL_tmps_stack[++PL_tmps_ix] = *mark;
b37c2d43 2572 SvREFCNT_inc_void(*mark);
cd06dffe
GS
2573 }
2574 }
d470f89e 2575 else { /* Should not happen? */
a57c6685 2576 LEAVE;
5dd42e15 2577 cxstack_ix--;
b0d9ce38 2578 POPSUB(cx,sv);
d470f89e 2579 PL_curpm = newpm;
b0d9ce38 2580 LEAVESUB(sv);
d470f89e 2581 DIE(aTHX_ "%s returned from lvalue subroutine in scalar context",
cd06dffe 2582 (MARK > SP ? "Empty array" : "Array"));
d470f89e 2583 }
cd06dffe
GS
2584 SP = MARK;
2585 }
2586 else if (gimme == G_ARRAY) {
2587 EXTEND_MORTAL(SP - newsp);
2588 for (mark = newsp + 1; mark <= SP; mark++) {
f206cdda
AMS
2589 if (*mark != &PL_sv_undef
2590 && SvFLAGS(*mark) & (SVs_TEMP | SVs_PADTMP | SVf_READONLY)) {
d470f89e
GS
2591 /* Might be flattened array after $#array = */
2592 PUTBACK;
a57c6685 2593 LEAVE;
5dd42e15 2594 cxstack_ix--;
b0d9ce38 2595 POPSUB(cx,sv);
d470f89e 2596 PL_curpm = newpm;
b0d9ce38 2597 LEAVESUB(sv);
f206cdda
AMS
2598 DIE(aTHX_ "Can't return a %s from lvalue subroutine",
2599 SvREADONLY(TOPs) ? "readonly value" : "temporary");
d470f89e 2600 }
cd06dffe 2601 else {
cd06dffe
GS
2602 /* Can be a localized value subject to deletion. */
2603 PL_tmps_stack[++PL_tmps_ix] = *mark;
b37c2d43 2604 SvREFCNT_inc_void(*mark);
cd06dffe
GS
2605 }
2606 }
2607 }
2608 }
2609 else {
2610 if (gimme == G_SCALAR) {
2611 temporise:
2612 MARK = newsp + 1;
2613 if (MARK <= SP) {
a8bba7fa 2614 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
cd06dffe
GS
2615 if (SvTEMP(TOPs)) {
2616 *MARK = SvREFCNT_inc(TOPs);
2617 FREETMPS;
2618 sv_2mortal(*MARK);
2619 }
2620 else {
959e3673 2621 sv = SvREFCNT_inc(TOPs); /* FREETMPS could clobber it */
cd06dffe 2622 FREETMPS;
959e3673
GS
2623 *MARK = sv_mortalcopy(sv);
2624 SvREFCNT_dec(sv);
cd06dffe
GS
2625 }
2626 }
2627 else
2628 *MARK = SvTEMP(TOPs) ? TOPs : sv_mortalcopy(TOPs);
2629 }
2630 else {
2631 MEXTEND(MARK, 0);
2632 *MARK = &PL_sv_undef;
2633 }
2634 SP = MARK;
2635 }
2636 else if (gimme == G_ARRAY) {
2637 temporise_array:
2638 for (MARK = newsp + 1; MARK <= SP; MARK++) {
2639 if (!SvTEMP(*MARK)) {
2640 *MARK = sv_mortalcopy(*MARK);
2641 TAINT_NOT; /* Each item is independent */
2642 }
2643 }
2644 }
2645 }
2646 PUTBACK;
1c846c1f 2647
a57c6685 2648 LEAVE;
5dd42e15 2649 cxstack_ix--;
b0d9ce38 2650 POPSUB(cx,sv); /* Stack values are safe: release CV and @_ ... */
cd06dffe
GS
2651 PL_curpm = newpm; /* ... and pop $1 et al */
2652
b0d9ce38 2653 LEAVESUB(sv);
f39bc417 2654 return cx->blk_sub.retop;
cd06dffe
GS
2655}
2656
a0d0e21e
LW
2657PP(pp_entersub)
2658{
27da23d5 2659 dVAR; dSP; dPOPss;
a0d0e21e 2660 GV *gv;
a0d0e21e 2661 register CV *cv;
c09156bb 2662 register PERL_CONTEXT *cx;
5d94fbed 2663 I32 gimme;
a9c4fd4e 2664 const bool hasargs = (PL_op->op_flags & OPf_STACKED) != 0;
a0d0e21e
LW
2665
2666 if (!sv)
cea2e8a9 2667 DIE(aTHX_ "Not a CODE reference");
a0d0e21e 2668 switch (SvTYPE(sv)) {
f1025168
NC
2669 /* This is overwhelming the most common case: */
2670 case SVt_PVGV:
6e592b3a
BM
2671 if (!isGV_with_GP(sv))
2672 DIE(aTHX_ "Not a CODE reference");
159b6efe 2673 if (!(cv = GvCVu((const GV *)sv))) {
f730a42d 2674 HV *stash;
f2c0649b 2675 cv = sv_2cv(sv, &stash, &gv, 0);
f730a42d 2676 }
f1025168 2677 if (!cv) {
a57c6685 2678 ENTER;
f1025168
NC
2679 SAVETMPS;
2680 goto try_autoload;
2681 }
2682 break;
a0d0e21e
LW
2683 default:
2684 if (!SvROK(sv)) {
a9c4fd4e 2685 const char *sym;
780a5241 2686 STRLEN len;
3280af22 2687 if (sv == &PL_sv_yes) { /* unfound import, ignore */
fb73857a 2688 if (hasargs)
3280af22 2689 SP = PL_stack_base + POPMARK;
a0d0e21e 2690 RETURN;
fb73857a 2691 }
15ff848f
CS
2692 if (SvGMAGICAL(sv)) {
2693 mg_get(sv);
f5f1d18e
AMS
2694 if (SvROK(sv))
2695 goto got_rv;
780a5241
NC
2696 if (SvPOKp(sv)) {
2697 sym = SvPVX_const(sv);
2698 len = SvCUR(sv);
2699 } else {
2700 sym = NULL;
2701 len = 0;
2702 }
15ff848f 2703 }
a9c4fd4e 2704 else {
780a5241 2705 sym = SvPV_const(sv, len);
a9c4fd4e 2706 }
15ff848f 2707 if (!sym)
cea2e8a9 2708 DIE(aTHX_ PL_no_usym, "a subroutine");
533c011a 2709 if (PL_op->op_private & HINT_STRICT_REFS)
973a7615 2710 DIE(aTHX_ "Can't use string (\"%.32s\"%s) as a subroutine ref while \"strict refs\" in use", sym, len>32 ? "..." : "");
780a5241 2711 cv = get_cvn_flags(sym, len, GV_ADD|SvUTF8(sv));
a0d0e21e
LW
2712 break;
2713 }
f5f1d18e 2714 got_rv:
f5284f61 2715 {
823a54a3 2716 SV * const * sp = &sv; /* Used in tryAMAGICunDEREF macro. */
f5284f61
IZ
2717 tryAMAGICunDEREF(to_cv);
2718 }
ea726b52 2719 cv = MUTABLE_CV(SvRV(sv));
a0d0e21e
LW
2720 if (SvTYPE(cv) == SVt_PVCV)
2721 break;
2722 /* FALL THROUGH */
2723 case SVt_PVHV:
2724 case SVt_PVAV:
cea2e8a9 2725 DIE(aTHX_ "Not a CODE reference");
f1025168 2726 /* This is the second most common case: */
a0d0e21e 2727 case SVt_PVCV:
ea726b52 2728 cv = MUTABLE_CV(sv);
a0d0e21e 2729 break;
a0d0e21e
LW
2730 }
2731
a57c6685 2732 ENTER;
a0d0e21e
LW
2733 SAVETMPS;
2734
2735 retry:
a0d0e21e 2736 if (!CvROOT(cv) && !CvXSUB(cv)) {
2f349aa0
NC
2737 GV* autogv;
2738 SV* sub_name;
2739
2740 /* anonymous or undef'd function leaves us no recourse */
2741 if (CvANON(cv) || !(gv = CvGV(cv)))
2742 DIE(aTHX_ "Undefined subroutine called");
2743
2744 /* autoloaded stub? */
2745 if (cv != GvCV(gv)) {
2746 cv = GvCV(gv);
2747 }
2748 /* should call AUTOLOAD now? */
2749 else {
7e623da3 2750try_autoload:
2f349aa0 2751 if ((autogv = gv_autoload4(GvSTASH(gv), GvNAME(gv), GvNAMELEN(gv),
7e623da3 2752 FALSE)))
2f349aa0
NC
2753 {
2754 cv = GvCV(autogv);
2755 }
2756 /* sorry */
2757 else {
2758 sub_name = sv_newmortal();
6136c704 2759 gv_efullname3(sub_name, gv, NULL);
be2597df 2760 DIE(aTHX_ "Undefined subroutine &%"SVf" called", SVfARG(sub_name));
2f349aa0
NC
2761 }
2762 }
2763 if (!cv)
2764 DIE(aTHX_ "Not a CODE reference");
2765 goto retry;
a0d0e21e
LW
2766 }
2767
54310121 2768 gimme = GIMME_V;
67caa1fe 2769 if ((PL_op->op_private & OPpENTERSUB_DB) && GvCV(PL_DBsub) && !CvNODEBUG(cv)) {
005a8a35 2770 Perl_get_db_sub(aTHX_ &sv, cv);
a9ef256d
NC
2771 if (CvISXSUB(cv))
2772 PL_curcopdb = PL_curcop;
1ad62f64 2773 if (CvLVALUE(cv)) {
2774 /* check for lsub that handles lvalue subroutines */
ae5c1e95 2775 cv = GvCV(gv_HVadd(gv_fetchpvs("DB::lsub", GV_ADDMULTI, SVt_PVHV)));
1ad62f64 2776 /* if lsub not found then fall back to DB::sub */
2777 if (!cv) cv = GvCV(PL_DBsub);
2778 } else {
2779 cv = GvCV(PL_DBsub);
2780 }
a9ef256d 2781
ccafdc96
RGS
2782 if (!cv || (!CvXSUB(cv) && !CvSTART(cv)))
2783 DIE(aTHX_ "No DB::sub routine defined");
67caa1fe 2784 }
a0d0e21e 2785
aed2304a 2786 if (!(CvISXSUB(cv))) {
f1025168 2787 /* This path taken at least 75% of the time */
a0d0e21e
LW
2788 dMARK;
2789 register I32 items = SP - MARK;
0bcc34c2 2790 AV* const padlist = CvPADLIST(cv);
a0d0e21e
LW
2791 PUSHBLOCK(cx, CXt_SUB, MARK);
2792 PUSHSUB(cx);
f39bc417 2793 cx->blk_sub.retop = PL_op->op_next;
a0d0e21e 2794 CvDEPTH(cv)++;
6b35e009
GS
2795 /* XXX This would be a natural place to set C<PL_compcv = cv> so
2796 * that eval'' ops within this sub know the correct lexical space.
a3985cdc
DM
2797 * Owing the speed considerations, we choose instead to search for
2798 * the cv using find_runcv() when calling doeval().
6b35e009 2799 */
3a76ca88
RGS
2800 if (CvDEPTH(cv) >= 2) {
2801 PERL_STACK_OVERFLOW_CHECK();
2802 pad_push(padlist, CvDEPTH(cv));
a0d0e21e 2803 }
3a76ca88
RGS
2804 SAVECOMPPAD();
2805 PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv));
2806 if (hasargs) {
502c6561 2807 AV *const av = MUTABLE_AV(PAD_SVl(0));
221373f0
GS
2808 if (AvREAL(av)) {
2809 /* @_ is normally not REAL--this should only ever
2810 * happen when DB::sub() calls things that modify @_ */
2811 av_clear(av);
2812 AvREAL_off(av);
2813 AvREIFY_on(av);
2814 }
3280af22 2815 cx->blk_sub.savearray = GvAV(PL_defgv);
502c6561 2816 GvAV(PL_defgv) = MUTABLE_AV(SvREFCNT_inc_simple(av));
dd2155a4 2817 CX_CURPAD_SAVE(cx->blk_sub);
6d4ff0d2 2818 cx->blk_sub.argarray = av;
a0d0e21e
LW
2819 ++MARK;
2820
2821 if (items > AvMAX(av) + 1) {
504618e9 2822 SV **ary = AvALLOC(av);
a0d0e21e
LW
2823 if (AvARRAY(av) != ary) {
2824 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
9c6bc640 2825 AvARRAY(av) = ary;
a0d0e21e
LW
2826 }
2827 if (items > AvMAX(av) + 1) {
2828 AvMAX(av) = items - 1;
2829 Renew(ary,items,SV*);
2830 AvALLOC(av) = ary;
9c6bc640 2831 AvARRAY(av) = ary;
a0d0e21e
LW
2832 }
2833 }
2834 Copy(MARK,AvARRAY(av),items,SV*);
93965878 2835 AvFILLp(av) = items - 1;
1c846c1f 2836
a0d0e21e
LW
2837 while (items--) {
2838 if (*MARK)
2839 SvTEMP_off(*MARK);
2840 MARK++;
2841 }
2842 }
4a925ff6
GS
2843 /* warning must come *after* we fully set up the context
2844 * stuff so that __WARN__ handlers can safely dounwind()
2845 * if they want to
2846 */
2b9dff67 2847 if (CvDEPTH(cv) == PERL_SUB_DEPTH_WARN && ckWARN(WARN_RECURSION)
4a925ff6
GS
2848 && !(PERLDB_SUB && cv == GvCV(PL_DBsub)))
2849 sub_crush_depth(cv);
a0d0e21e
LW
2850 RETURNOP(CvSTART(cv));
2851 }
f1025168 2852 else {
3a76ca88 2853 I32 markix = TOPMARK;
f1025168 2854
3a76ca88 2855 PUTBACK;
f1025168 2856
3a76ca88
RGS
2857 if (!hasargs) {
2858 /* Need to copy @_ to stack. Alternative may be to
2859 * switch stack to @_, and copy return values
2860 * back. This would allow popping @_ in XSUB, e.g.. XXXX */
2861 AV * const av = GvAV(PL_defgv);
2862 const I32 items = AvFILLp(av) + 1; /* @_ is not tieable */
2863
2864 if (items) {
2865 /* Mark is at the end of the stack. */
2866 EXTEND(SP, items);
2867 Copy(AvARRAY(av), SP + 1, items, SV*);
2868 SP += items;
2869 PUTBACK ;
2870 }
2871 }
2872 /* We assume first XSUB in &DB::sub is the called one. */
2873 if (PL_curcopdb) {
2874 SAVEVPTR(PL_curcop);
2875 PL_curcop = PL_curcopdb;
2876 PL_curcopdb = NULL;
2877 }
2878 /* Do we need to open block here? XXXX */
72df79cf 2879
2880 /* CvXSUB(cv) must not be NULL because newXS() refuses NULL xsub address */
2881 assert(CvXSUB(cv));
2882 CALL_FPTR(CvXSUB(cv))(aTHX_ cv);
3a76ca88
RGS
2883
2884 /* Enforce some sanity in scalar context. */
2885 if (gimme == G_SCALAR && ++markix != PL_stack_sp - PL_stack_base ) {
2886 if (markix > PL_stack_sp - PL_stack_base)
2887 *(PL_stack_base + markix) = &PL_sv_undef;
2888 else
2889 *(PL_stack_base + markix) = *PL_stack_sp;
2890 PL_stack_sp = PL_stack_base + markix;
2891 }
a57c6685 2892 LEAVE;
f1025168
NC
2893 return NORMAL;
2894 }
a0d0e21e
LW
2895}
2896
44a8e56a 2897void
864dbfa3 2898Perl_sub_crush_depth(pTHX_ CV *cv)
44a8e56a 2899{
7918f24d
NC
2900 PERL_ARGS_ASSERT_SUB_CRUSH_DEPTH;
2901
44a8e56a 2902 if (CvANON(cv))
9014280d 2903 Perl_warner(aTHX_ packWARN(WARN_RECURSION), "Deep recursion on anonymous subroutine");
44a8e56a 2904 else {
aec46f14 2905 SV* const tmpstr = sv_newmortal();
6136c704 2906 gv_efullname3(tmpstr, CvGV(cv), NULL);
35c1215d 2907 Perl_warner(aTHX_ packWARN(WARN_RECURSION), "Deep recursion on subroutine \"%"SVf"\"",
be2597df 2908 SVfARG(tmpstr));
44a8e56a
PP
2909 }
2910}
2911
a0d0e21e
LW
2912PP(pp_aelem)
2913{
97aff369 2914 dVAR; dSP;
a0d0e21e 2915 SV** svp;
a3b680e6 2916 SV* const elemsv = POPs;
d804643f 2917 IV elem = SvIV(elemsv);
502c6561 2918 AV *const av = MUTABLE_AV(POPs);
e1ec3a88
AL
2919 const U32 lval = PL_op->op_flags & OPf_MOD || LVRET;
2920 const U32 defer = (PL_op->op_private & OPpLVAL_DEFER) && (elem > av_len(av));
4ad10a0b
VP
2921 const bool localizing = PL_op->op_private & OPpLVAL_INTRO;
2922 bool preeminent = TRUE;
be6c24e0 2923 SV *sv;
a0d0e21e 2924
e35c1634 2925 if (SvROK(elemsv) && !SvGAMAGIC(elemsv) && ckWARN(WARN_MISC))
95b63a38
JH
2926 Perl_warner(aTHX_ packWARN(WARN_MISC),
2927 "Use of reference \"%"SVf"\" as array index",
be2597df 2928 SVfARG(elemsv));
748a9306 2929 if (elem > 0)
fc15ae8f 2930 elem -= CopARYBASE_get(PL_curcop);
a0d0e21e
LW
2931 if (SvTYPE(av) != SVt_PVAV)
2932 RETPUSHUNDEF;
4ad10a0b
VP
2933
2934 if (localizing) {
2935 MAGIC *mg;
2936 HV *stash;
2937
2938 /* If we can determine whether the element exist,
2939 * Try to preserve the existenceness of a tied array
2940 * element by using EXISTS and DELETE if possible.
2941 * Fallback to FETCH and STORE otherwise. */
2942 if (SvCANEXISTDELETE(av))
2943 preeminent = av_exists(av, elem);
2944 }
2945
68dc0745 2946 svp = av_fetch(av, elem, lval && !defer);
a0d0e21e 2947 if (lval) {
2b573ace 2948#ifdef PERL_MALLOC_WRAP
2b573ace 2949 if (SvUOK(elemsv)) {
a9c4fd4e 2950 const UV uv = SvUV(elemsv);
2b573ace
JH
2951 elem = uv > IV_MAX ? IV_MAX : uv;
2952 }
2953 else if (SvNOK(elemsv))
2954 elem = (IV)SvNV(elemsv);
a3b680e6
AL
2955 if (elem > 0) {
2956 static const char oom_array_extend[] =
2957 "Out of memory during array extend"; /* Duplicated in av.c */
2b573ace 2958 MEM_WRAP_CHECK_1(elem,SV*,oom_array_extend);
a3b680e6 2959 }
2b573ace 2960#endif
3280af22 2961 if (!svp || *svp == &PL_sv_undef) {
68dc0745
PP
2962 SV* lv;
2963 if (!defer)
cea2e8a9 2964 DIE(aTHX_ PL_no_aelem, elem);
68dc0745
PP
2965 lv = sv_newmortal();
2966 sv_upgrade(lv, SVt_PVLV);
2967 LvTYPE(lv) = 'y';
a0714e2c 2968 sv_magic(lv, NULL, PERL_MAGIC_defelem, NULL, 0);
b37c2d43 2969 LvTARG(lv) = SvREFCNT_inc_simple(av);
68dc0745
PP
2970 LvTARGOFF(lv) = elem;
2971 LvTARGLEN(lv) = 1;
2972 PUSHs(lv);
2973 RETURN;
2974 }
4ad10a0b
VP
2975 if (localizing) {
2976 if (preeminent)
2977 save_aelem(av, elem, svp);
2978 else
2979 SAVEADELETE(av, elem);
2980 }
533c011a
NIS
2981 else if (PL_op->op_private & OPpDEREF)
2982 vivify_ref(*svp, PL_op->op_private & OPpDEREF);
a0d0e21e 2983 }
3280af22 2984 sv = (svp ? *svp : &PL_sv_undef);
be6c24e0
GS
2985 if (!lval && SvGMAGICAL(sv)) /* see note in pp_helem() */
2986 sv = sv_mortalcopy(sv);
2987 PUSHs(sv);
a0d0e21e
LW
2988 RETURN;
2989}
2990
02a9e968 2991void
864dbfa3 2992Perl_vivify_ref(pTHX_ SV *sv, U32 to_what)
02a9e968 2993{
7918f24d
NC
2994 PERL_ARGS_ASSERT_VIVIFY_REF;
2995
5b295bef 2996 SvGETMAGIC(sv);
02a9e968
CS
2997 if (!SvOK(sv)) {
2998 if (SvREADONLY(sv))
f1f66076 2999 Perl_croak(aTHX_ "%s", PL_no_modify);
43230e26 3000 prepare_SV_for_RV(sv);
68dc0745 3001 switch (to_what) {
5f05dabc 3002 case OPpDEREF_SV:
561b68a9 3003 SvRV_set(sv, newSV(0));
5f05dabc
PP
3004 break;
3005 case OPpDEREF_AV:
ad64d0ec 3006 SvRV_set(sv, MUTABLE_SV(newAV()));
5f05dabc
PP
3007 break;
3008 case OPpDEREF_HV:
ad64d0ec 3009 SvRV_set(sv, MUTABLE_SV(newHV()));
5f05dabc
PP
3010 break;
3011 }
02a9e968
CS
3012 SvROK_on(sv);
3013 SvSETMAGIC(sv);
3014 }
3015}
3016
a0d0e21e
LW
3017PP(pp_method)
3018{
97aff369 3019 dVAR; dSP;
890ce7af 3020 SV* const sv = TOPs;
f5d5a27c
CS
3021
3022 if (SvROK(sv)) {
890ce7af 3023 SV* const rsv = SvRV(sv);
f5d5a27c
CS
3024 if (SvTYPE(rsv) == SVt_PVCV) {
3025 SETs(rsv);
3026 RETURN;
3027 }
3028 }
3029
4608196e 3030 SETs(method_common(sv, NULL));
f5d5a27c
CS
3031 RETURN;
3032}
3033
3034PP(pp_method_named)
3035{
97aff369 3036 dVAR; dSP;
890ce7af 3037 SV* const sv = cSVOP_sv;
c158a4fd 3038 U32 hash = SvSHARED_HASH(sv);
f5d5a27c
CS
3039
3040 XPUSHs(method_common(sv, &hash));
3041 RETURN;
3042}
3043
3044STATIC SV *
3045S_method_common(pTHX_ SV* meth, U32* hashp)
3046{
97aff369 3047 dVAR;
a0d0e21e
LW
3048 SV* ob;
3049 GV* gv;
56304f61 3050 HV* stash;
6136c704 3051 const char* packname = NULL;
a0714e2c 3052 SV *packsv = NULL;
ac91690f 3053 STRLEN packlen;
46c461b5 3054 SV * const sv = *(PL_stack_base + TOPMARK + 1);
f5d5a27c 3055
7918f24d
NC
3056 PERL_ARGS_ASSERT_METHOD_COMMON;
3057
4f1b7578 3058 if (!sv)
a214957f
VP
3059 Perl_croak(aTHX_ "Can't call method \"%"SVf"\" on an undefined value",
3060 SVfARG(meth));
4f1b7578 3061
5b295bef 3062 SvGETMAGIC(sv);
a0d0e21e 3063 if (SvROK(sv))
ad64d0ec 3064 ob = MUTABLE_SV(SvRV(sv));
a0d0e21e
LW
3065 else {
3066 GV* iogv;
a0d0e21e 3067
af09ea45 3068 /* this isn't a reference */
5c144d81 3069 if(SvOK(sv) && (packname = SvPV_const(sv, packlen))) {
b464bac0 3070 const HE* const he = hv_fetch_ent(PL_stashcache, sv, 0, 0);
081fc587 3071 if (he) {
5e6396ae 3072 stash = INT2PTR(HV*,SvIV(HeVAL(he)));
081fc587
AB
3073 goto fetch;
3074 }
3075 }
3076
a0d0e21e 3077 if (!SvOK(sv) ||
05f5af9a 3078 !(packname) ||
f776e3cd 3079 !(iogv = gv_fetchsv(sv, 0, SVt_PVIO)) ||
ad64d0ec 3080 !(ob=MUTABLE_SV(GvIO(iogv))))
a0d0e21e 3081 {
af09ea45 3082 /* this isn't the name of a filehandle either */
1c846c1f 3083 if (!packname ||
fd400ab9 3084 ((UTF8_IS_START(*packname) && DO_UTF8(sv))
b86a2fa7 3085 ? !isIDFIRST_utf8((U8*)packname)
834a4ddd
LW
3086 : !isIDFIRST(*packname)
3087 ))
3088 {
a214957f
VP
3089 Perl_croak(aTHX_ "Can't call method \"%"SVf"\" %s",
3090 SVfARG(meth),
f5d5a27c
CS
3091 SvOK(sv) ? "without a package or object reference"
3092 : "on an undefined value");
834a4ddd 3093 }
af09ea45 3094 /* assume it's a package name */
da51bb9b 3095 stash = gv_stashpvn(packname, packlen, 0);
0dae17bd
GS
3096 if (!stash)
3097 packsv = sv;
081fc587 3098 else {
d4c19fe8 3099 SV* const ref = newSViv(PTR2IV(stash));
04fe65b0 3100 (void)hv_store(PL_stashcache, packname, packlen, ref, 0);
7e8961ec 3101 }
ac91690f 3102 goto fetch;
a0d0e21e 3103 }
af09ea45 3104 /* it _is_ a filehandle name -- replace with a reference */
ad64d0ec 3105 *(PL_stack_base + TOPMARK + 1) = sv_2mortal(newRV(MUTABLE_SV(iogv)));
a0d0e21e
LW
3106 }
3107
af09ea45 3108 /* if we got here, ob should be a reference or a glob */
f0d43078 3109 if (!ob || !(SvOBJECT(ob)
6e592b3a
BM
3110 || (SvTYPE(ob) == SVt_PVGV
3111 && isGV_with_GP(ob)
159b6efe 3112 && (ob = MUTABLE_SV(GvIO((const GV *)ob)))
f0d43078
GS
3113 && SvOBJECT(ob))))
3114 {
a214957f 3115 const char * const name = SvPV_nolen_const(meth);
f5d5a27c 3116 Perl_croak(aTHX_ "Can't call method \"%s\" on unblessed reference",
59e7186f 3117 (SvSCREAM(meth) && strEQ(name,"isa")) ? "DOES" :
f5d5a27c 3118 name);
f0d43078 3119 }
a0d0e21e 3120
56304f61 3121 stash = SvSTASH(ob);
a0d0e21e 3122
ac91690f 3123 fetch:
af09ea45
IK
3124 /* NOTE: stash may be null, hope hv_fetch_ent and
3125 gv_fetchmethod can cope (it seems they can) */
3126
f5d5a27c
CS
3127 /* shortcut for simple names */
3128 if (hashp) {
b464bac0 3129 const HE* const he = hv_fetch_ent(stash, meth, 0, *hashp);
f5d5a27c 3130 if (he) {
159b6efe 3131 gv = MUTABLE_GV(HeVAL(he));
f5d5a27c 3132 if (isGV(gv) && GvCV(gv) &&
e1a479c5 3133 (!GvCVGEN(gv) || GvCVGEN(gv)
dd69841b 3134 == (PL_sub_generation + HvMROMETA(stash)->cache_gen)))
ad64d0ec 3135 return MUTABLE_SV(GvCV(gv));
f5d5a27c
CS
3136 }
3137 }
3138
a214957f
VP
3139 gv = gv_fetchmethod_flags(stash ? stash : MUTABLE_HV(packsv),
3140 SvPV_nolen_const(meth),
256d1bb2 3141 GV_AUTOLOAD | GV_CROAK);
9b9d0b15 3142
256d1bb2 3143 assert(gv);
9b9d0b15 3144
ad64d0ec 3145 return isGV(gv) ? MUTABLE_SV(GvCV(gv)) : MUTABLE_SV(gv);
a0d0e21e 3146}
241d1a3b
NC
3147
3148/*
3149 * Local variables:
3150 * c-indentation-style: bsd
3151 * c-basic-offset: 4
3152 * indent-tabs-mode: t
3153 * End:
3154 *
37442d52
RGS
3155 * ex: set ts=8 sts=4 sw=4 noet:
3156 */