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Fix malformed utf8 in regexec.c
[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"]
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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;
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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
NC
159 if (SvROK(cv)) {
160 ENTER;
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
NC
169 SvREFCNT_dec(cv);
170 LEAVE;
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;
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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
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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;
236988e4 722 ENTER;
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);
236988e4
PP
729 LEAVE;
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);
1212 /* This RV is about to own a reference to the regexp. (In addition to the
1213 reference already owned by the PMOP. */
1214 ReREFCNT_inc(rx);
ad64d0ec 1215 SvRV_set(rv, MUTABLE_SV(rx));
288b8c02
NC
1216 SvROK_on(rv);
1217
1218 if (pkg) {
1219 HV* const stash = gv_stashpv(SvPV_nolen(pkg), GV_ADD);
a954f6ee 1220 SvREFCNT_dec(pkg);
288b8c02
NC
1221 (void)sv_bless(rv, stash);
1222 }
1223
07bc277f 1224 if (RX_EXTFLAGS(rx) & RXf_TAINTED)
e08e52cf 1225 SvTAINTED_on(rv);
c8c13c22 1226 XPUSHs(rv);
1227 RETURN;
8782bef2
GB
1228}
1229
a0d0e21e
LW
1230PP(pp_match)
1231{
97aff369 1232 dVAR; dSP; dTARG;
a0d0e21e 1233 register PMOP *pm = cPMOP;
d65afb4b 1234 PMOP *dynpm = pm;
0d46e09a
SP
1235 register const char *t;
1236 register const char *s;
5c144d81 1237 const char *strend;
a0d0e21e 1238 I32 global;
1ed74d04 1239 U8 r_flags = REXEC_CHECKED;
5c144d81 1240 const char *truebase; /* Start of string */
aaa362c4 1241 register REGEXP *rx = PM_GETRE(pm);
b3eb6a9b 1242 bool rxtainted;
a3b680e6 1243 const I32 gimme = GIMME;
a0d0e21e 1244 STRLEN len;
748a9306 1245 I32 minmatch = 0;
a3b680e6 1246 const I32 oldsave = PL_savestack_ix;
f86702cc 1247 I32 update_minmatch = 1;
e60df1fa 1248 I32 had_zerolen = 0;
58e23c8d 1249 U32 gpos = 0;
a0d0e21e 1250
533c011a 1251 if (PL_op->op_flags & OPf_STACKED)
a0d0e21e 1252 TARG = POPs;
59f00321
RGS
1253 else if (PL_op->op_private & OPpTARGET_MY)
1254 GETTARGET;
a0d0e21e 1255 else {
54b9620d 1256 TARG = DEFSV;
a0d0e21e
LW
1257 EXTEND(SP,1);
1258 }
d9f424b2 1259
c277df42 1260 PUTBACK; /* EVAL blocks need stack_sp. */
5c144d81 1261 s = SvPV_const(TARG, len);
a0d0e21e 1262 if (!s)
2269b42e 1263 DIE(aTHX_ "panic: pp_match");
890ce7af 1264 strend = s + len;
07bc277f 1265 rxtainted = ((RX_EXTFLAGS(rx) & RXf_TAINTED) ||
3280af22 1266 (PL_tainted && (pm->op_pmflags & PMf_RETAINT)));
9212bbba 1267 TAINT_NOT;
a0d0e21e 1268
a30b2f1f 1269 RX_MATCH_UTF8_set(rx, DO_UTF8(TARG));
d9f424b2 1270
d65afb4b 1271 /* PMdf_USED is set after a ?? matches once */
c737faaf
YO
1272 if (
1273#ifdef USE_ITHREADS
1274 SvREADONLY(PL_regex_pad[pm->op_pmoffset])
1275#else
1276 pm->op_pmflags & PMf_USED
1277#endif
1278 ) {
c277df42 1279 failure:
a0d0e21e
LW
1280 if (gimme == G_ARRAY)
1281 RETURN;
1282 RETPUSHNO;
1283 }
1284
c737faaf
YO
1285
1286
d65afb4b 1287 /* empty pattern special-cased to use last successful pattern if possible */
220fc49f 1288 if (!RX_PRELEN(rx) && PL_curpm) {
3280af22 1289 pm = PL_curpm;
aaa362c4 1290 rx = PM_GETRE(pm);
a0d0e21e 1291 }
d65afb4b 1292
07bc277f 1293 if (RX_MINLEN(rx) > (I32)len)
d65afb4b 1294 goto failure;
c277df42 1295
a0d0e21e 1296 truebase = t = s;
ad94a511
IZ
1297
1298 /* XXXX What part of this is needed with true \G-support? */
d65afb4b 1299 if ((global = dynpm->op_pmflags & PMf_GLOBAL)) {
07bc277f 1300 RX_OFFS(rx)[0].start = -1;
a0d0e21e 1301 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
c445ea15 1302 MAGIC* const mg = mg_find(TARG, PERL_MAGIC_regex_global);
565764a8 1303 if (mg && mg->mg_len >= 0) {
07bc277f
NC
1304 if (!(RX_EXTFLAGS(rx) & RXf_GPOS_SEEN))
1305 RX_OFFS(rx)[0].end = RX_OFFS(rx)[0].start = mg->mg_len;
1306 else if (RX_EXTFLAGS(rx) & RXf_ANCH_GPOS) {
0ef3e39e 1307 r_flags |= REXEC_IGNOREPOS;
07bc277f
NC
1308 RX_OFFS(rx)[0].end = RX_OFFS(rx)[0].start = mg->mg_len;
1309 } else if (RX_EXTFLAGS(rx) & RXf_GPOS_FLOAT)
58e23c8d
YO
1310 gpos = mg->mg_len;
1311 else
07bc277f
NC
1312 RX_OFFS(rx)[0].end = RX_OFFS(rx)[0].start = mg->mg_len;
1313 minmatch = (mg->mg_flags & MGf_MINMATCH) ? RX_GOFS(rx) + 1 : 0;
f86702cc 1314 update_minmatch = 0;
748a9306 1315 }
a0d0e21e
LW
1316 }
1317 }
a229a030 1318 /* XXX: comment out !global get safe $1 vars after a
62e7980d 1319 match, BUT be aware that this leads to dramatic slowdowns on
a229a030
YO
1320 /g matches against large strings. So far a solution to this problem
1321 appears to be quite tricky.
1322 Test for the unsafe vars are TODO for now. */
07bc277f 1323 if (( !global && RX_NPARENS(rx))
cde0cee5 1324 || SvTEMP(TARG) || PL_sawampersand ||
07bc277f 1325 (RX_EXTFLAGS(rx) & (RXf_EVAL_SEEN|RXf_PMf_KEEPCOPY)))
14977893 1326 r_flags |= REXEC_COPY_STR;
1c846c1f 1327 if (SvSCREAM(TARG))
22e551b9
IZ
1328 r_flags |= REXEC_SCREAM;
1329
a0d0e21e 1330play_it_again:
07bc277f
NC
1331 if (global && RX_OFFS(rx)[0].start != -1) {
1332 t = s = RX_OFFS(rx)[0].end + truebase - RX_GOFS(rx);
1333 if ((s + RX_MINLEN(rx)) > strend || s < truebase)
a0d0e21e 1334 goto nope;
f86702cc 1335 if (update_minmatch++)
e60df1fa 1336 minmatch = had_zerolen;
a0d0e21e 1337 }
07bc277f 1338 if (RX_EXTFLAGS(rx) & RXf_USE_INTUIT &&
3c8556c3 1339 DO_UTF8(TARG) == (RX_UTF8(rx) != 0)) {
5c144d81
NC
1340 /* FIXME - can PL_bostr be made const char *? */
1341 PL_bostr = (char *)truebase;
f9f4320a 1342 s = CALLREG_INTUIT_START(rx, TARG, (char *)s, (char *)strend, r_flags, NULL);
f722798b
IZ
1343
1344 if (!s)
1345 goto nope;
07bc277f 1346 if ( (RX_EXTFLAGS(rx) & RXf_CHECK_ALL)
14977893 1347 && !PL_sawampersand
07bc277f
NC
1348 && !(RX_EXTFLAGS(rx) & RXf_PMf_KEEPCOPY)
1349 && ((RX_EXTFLAGS(rx) & RXf_NOSCAN)
1350 || !((RX_EXTFLAGS(rx) & RXf_INTUIT_TAIL)
05b4157f
GS
1351 && (r_flags & REXEC_SCREAM)))
1352 && !SvROK(TARG)) /* Cannot trust since INTUIT cannot guess ^ */
f722798b 1353 goto yup;
a0d0e21e 1354 }
1f36f092
RB
1355 if (CALLREGEXEC(rx, (char*)s, (char *)strend, (char*)truebase,
1356 minmatch, TARG, NUM2PTR(void*, gpos), r_flags))
bbce6d69 1357 {
3280af22 1358 PL_curpm = pm;
c737faaf
YO
1359 if (dynpm->op_pmflags & PMf_ONCE) {
1360#ifdef USE_ITHREADS
1361 SvREADONLY_on(PL_regex_pad[dynpm->op_pmoffset]);
1362#else
1363 dynpm->op_pmflags |= PMf_USED;
1364#endif
1365 }
a0d0e21e
LW
1366 goto gotcha;
1367 }
1368 else
1369 goto ret_no;
1370 /*NOTREACHED*/
1371
1372 gotcha:
72311751
GS
1373 if (rxtainted)
1374 RX_MATCH_TAINTED_on(rx);
1375 TAINT_IF(RX_MATCH_TAINTED(rx));
a0d0e21e 1376 if (gimme == G_ARRAY) {
07bc277f 1377 const I32 nparens = RX_NPARENS(rx);
a3b680e6 1378 I32 i = (global && !nparens) ? 1 : 0;
a0d0e21e 1379
c277df42 1380 SPAGAIN; /* EVAL blocks could move the stack. */
ffc61ed2
JH
1381 EXTEND(SP, nparens + i);
1382 EXTEND_MORTAL(nparens + i);
1383 for (i = !i; i <= nparens; i++) {
a0d0e21e 1384 PUSHs(sv_newmortal());
07bc277f
NC
1385 if ((RX_OFFS(rx)[i].start != -1) && RX_OFFS(rx)[i].end != -1 ) {
1386 const I32 len = RX_OFFS(rx)[i].end - RX_OFFS(rx)[i].start;
1387 s = RX_OFFS(rx)[i].start + truebase;
1388 if (RX_OFFS(rx)[i].end < 0 || RX_OFFS(rx)[i].start < 0 ||
290deeac
A
1389 len < 0 || len > strend - s)
1390 DIE(aTHX_ "panic: pp_match start/end pointers");
a0d0e21e 1391 sv_setpvn(*SP, s, len);
cce850e4 1392 if (DO_UTF8(TARG) && is_utf8_string((U8*)s, len))
a197cbdd 1393 SvUTF8_on(*SP);
a0d0e21e
LW
1394 }
1395 }
1396 if (global) {
d65afb4b 1397 if (dynpm->op_pmflags & PMf_CONTINUE) {
6136c704 1398 MAGIC* mg = NULL;
0af80b60
HS
1399 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG))
1400 mg = mg_find(TARG, PERL_MAGIC_regex_global);
1401 if (!mg) {
d83f0a82
NC
1402#ifdef PERL_OLD_COPY_ON_WRITE
1403 if (SvIsCOW(TARG))
1404 sv_force_normal_flags(TARG, 0);
1405#endif
1406 mg = sv_magicext(TARG, NULL, PERL_MAGIC_regex_global,
1407 &PL_vtbl_mglob, NULL, 0);
0af80b60 1408 }
07bc277f
NC
1409 if (RX_OFFS(rx)[0].start != -1) {
1410 mg->mg_len = RX_OFFS(rx)[0].end;
1411 if (RX_OFFS(rx)[0].start + RX_GOFS(rx) == (UV)RX_OFFS(rx)[0].end)
0af80b60
HS
1412 mg->mg_flags |= MGf_MINMATCH;
1413 else
1414 mg->mg_flags &= ~MGf_MINMATCH;
1415 }
1416 }
07bc277f
NC
1417 had_zerolen = (RX_OFFS(rx)[0].start != -1
1418 && (RX_OFFS(rx)[0].start + RX_GOFS(rx)
1419 == (UV)RX_OFFS(rx)[0].end));
c277df42 1420 PUTBACK; /* EVAL blocks may use stack */
cf93c79d 1421 r_flags |= REXEC_IGNOREPOS | REXEC_NOT_FIRST;
a0d0e21e
LW
1422 goto play_it_again;
1423 }
ffc61ed2 1424 else if (!nparens)
bde848c5 1425 XPUSHs(&PL_sv_yes);
4633a7c4 1426 LEAVE_SCOPE(oldsave);
a0d0e21e
LW
1427 RETURN;
1428 }
1429 else {
1430 if (global) {
cbbf8932 1431 MAGIC* mg;
a0d0e21e 1432 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG))
14befaf4 1433 mg = mg_find(TARG, PERL_MAGIC_regex_global);
cbbf8932
AL
1434 else
1435 mg = NULL;
a0d0e21e 1436 if (!mg) {
d83f0a82
NC
1437#ifdef PERL_OLD_COPY_ON_WRITE
1438 if (SvIsCOW(TARG))
1439 sv_force_normal_flags(TARG, 0);
1440#endif
1441 mg = sv_magicext(TARG, NULL, PERL_MAGIC_regex_global,
1442 &PL_vtbl_mglob, NULL, 0);
a0d0e21e 1443 }
07bc277f
NC
1444 if (RX_OFFS(rx)[0].start != -1) {
1445 mg->mg_len = RX_OFFS(rx)[0].end;
1446 if (RX_OFFS(rx)[0].start + RX_GOFS(rx) == (UV)RX_OFFS(rx)[0].end)
748a9306
LW
1447 mg->mg_flags |= MGf_MINMATCH;
1448 else
1449 mg->mg_flags &= ~MGf_MINMATCH;
1450 }
a0d0e21e 1451 }
4633a7c4 1452 LEAVE_SCOPE(oldsave);
a0d0e21e
LW
1453 RETPUSHYES;
1454 }
1455
f722798b 1456yup: /* Confirmed by INTUIT */
72311751
GS
1457 if (rxtainted)
1458 RX_MATCH_TAINTED_on(rx);
1459 TAINT_IF(RX_MATCH_TAINTED(rx));
3280af22 1460 PL_curpm = pm;
c737faaf
YO
1461 if (dynpm->op_pmflags & PMf_ONCE) {
1462#ifdef USE_ITHREADS
1463 SvREADONLY_on(PL_regex_pad[dynpm->op_pmoffset]);
1464#else
1465 dynpm->op_pmflags |= PMf_USED;
1466#endif
1467 }
cf93c79d 1468 if (RX_MATCH_COPIED(rx))
07bc277f 1469 Safefree(RX_SUBBEG(rx));
cf93c79d 1470 RX_MATCH_COPIED_off(rx);
07bc277f 1471 RX_SUBBEG(rx) = NULL;
a0d0e21e 1472 if (global) {
5c144d81 1473 /* FIXME - should rx->subbeg be const char *? */
07bc277f
NC
1474 RX_SUBBEG(rx) = (char *) truebase;
1475 RX_OFFS(rx)[0].start = s - truebase;
a30b2f1f 1476 if (RX_MATCH_UTF8(rx)) {
07bc277f
NC
1477 char * const t = (char*)utf8_hop((U8*)s, RX_MINLENRET(rx));
1478 RX_OFFS(rx)[0].end = t - truebase;
60aeb6fd
NIS
1479 }
1480 else {
07bc277f 1481 RX_OFFS(rx)[0].end = s - truebase + RX_MINLENRET(rx);
60aeb6fd 1482 }
07bc277f 1483 RX_SUBLEN(rx) = strend - truebase;
a0d0e21e 1484 goto gotcha;
1c846c1f 1485 }
07bc277f 1486 if (PL_sawampersand || RX_EXTFLAGS(rx) & RXf_PMf_KEEPCOPY) {
14977893 1487 I32 off;
f8c7b90f 1488#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
1489 if (SvIsCOW(TARG) || (SvFLAGS(TARG) & CAN_COW_MASK) == CAN_COW_FLAGS) {
1490 if (DEBUG_C_TEST) {
1491 PerlIO_printf(Perl_debug_log,
1492 "Copy on write: pp_match $& capture, type %d, truebase=%p, t=%p, difference %d\n",
6c9570dc 1493 (int) SvTYPE(TARG), (void*)truebase, (void*)t,
ed252734
NC
1494 (int)(t-truebase));
1495 }
bdd9a1b1
NC
1496 RX_SAVED_COPY(rx) = sv_setsv_cow(RX_SAVED_COPY(rx), TARG);
1497 RX_SUBBEG(rx)
1498 = (char *) SvPVX_const(RX_SAVED_COPY(rx)) + (t - truebase);
1499 assert (SvPOKp(RX_SAVED_COPY(rx)));
ed252734
NC
1500 } else
1501#endif
1502 {
14977893 1503
07bc277f 1504 RX_SUBBEG(rx) = savepvn(t, strend - t);
f8c7b90f 1505#ifdef PERL_OLD_COPY_ON_WRITE
bdd9a1b1 1506 RX_SAVED_COPY(rx) = NULL;
ed252734
NC
1507#endif
1508 }
07bc277f 1509 RX_SUBLEN(rx) = strend - t;
14977893 1510 RX_MATCH_COPIED_on(rx);
07bc277f
NC
1511 off = RX_OFFS(rx)[0].start = s - t;
1512 RX_OFFS(rx)[0].end = off + RX_MINLENRET(rx);
14977893
JH
1513 }
1514 else { /* startp/endp are used by @- @+. */
07bc277f
NC
1515 RX_OFFS(rx)[0].start = s - truebase;
1516 RX_OFFS(rx)[0].end = s - truebase + RX_MINLENRET(rx);
14977893 1517 }
07bc277f 1518 /* including RX_NPARENS(rx) in the below code seems highly suspicious.
cde0cee5 1519 -dmq */
07bc277f 1520 RX_NPARENS(rx) = RX_LASTPAREN(rx) = RX_LASTCLOSEPAREN(rx) = 0; /* used by @-, @+, and $^N */
4633a7c4 1521 LEAVE_SCOPE(oldsave);
a0d0e21e
LW
1522 RETPUSHYES;
1523
1524nope:
a0d0e21e 1525ret_no:
d65afb4b 1526 if (global && !(dynpm->op_pmflags & PMf_CONTINUE)) {
a0d0e21e 1527 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
6136c704 1528 MAGIC* const mg = mg_find(TARG, PERL_MAGIC_regex_global);
a0d0e21e 1529 if (mg)
565764a8 1530 mg->mg_len = -1;
a0d0e21e
LW
1531 }
1532 }
4633a7c4 1533 LEAVE_SCOPE(oldsave);
a0d0e21e
LW
1534 if (gimme == G_ARRAY)
1535 RETURN;
1536 RETPUSHNO;
1537}
1538
1539OP *
864dbfa3 1540Perl_do_readline(pTHX)
a0d0e21e 1541{
27da23d5 1542 dVAR; dSP; dTARGETSTACKED;
a0d0e21e
LW
1543 register SV *sv;
1544 STRLEN tmplen = 0;
1545 STRLEN offset;
760ac839 1546 PerlIO *fp;
a3b680e6
AL
1547 register IO * const io = GvIO(PL_last_in_gv);
1548 register const I32 type = PL_op->op_type;
1549 const I32 gimme = GIMME_V;
a0d0e21e 1550
6136c704 1551 if (io) {
ad64d0ec 1552 MAGIC * const mg = SvTIED_mg((const SV *)io, PERL_MAGIC_tiedscalar);
6136c704
AL
1553 if (mg) {
1554 PUSHMARK(SP);
ad64d0ec 1555 XPUSHs(SvTIED_obj(MUTABLE_SV(io), mg));
6136c704
AL
1556 PUTBACK;
1557 ENTER;
1558 call_method("READLINE", gimme);
1559 LEAVE;
1560 SPAGAIN;
1561 if (gimme == G_SCALAR) {
1562 SV* const result = POPs;
1563 SvSetSV_nosteal(TARG, result);
1564 PUSHTARG;
1565 }
1566 RETURN;
0b7c7b4f 1567 }
e79b0511 1568 }
4608196e 1569 fp = NULL;
a0d0e21e
LW
1570 if (io) {
1571 fp = IoIFP(io);
1572 if (!fp) {
1573 if (IoFLAGS(io) & IOf_ARGV) {
1574 if (IoFLAGS(io) & IOf_START) {
a0d0e21e 1575 IoLINES(io) = 0;
3280af22 1576 if (av_len(GvAVn(PL_last_in_gv)) < 0) {
1d7c1841 1577 IoFLAGS(io) &= ~IOf_START;
4608196e 1578 do_open(PL_last_in_gv,"-",1,FALSE,O_RDONLY,0,NULL);
76f68e9b 1579 sv_setpvs(GvSVn(PL_last_in_gv), "-");
3280af22 1580 SvSETMAGIC(GvSV(PL_last_in_gv));
a2008d6d
GS
1581 fp = IoIFP(io);
1582 goto have_fp;
a0d0e21e
LW
1583 }
1584 }
3280af22 1585 fp = nextargv(PL_last_in_gv);
a0d0e21e 1586 if (!fp) { /* Note: fp != IoIFP(io) */
3280af22 1587 (void)do_close(PL_last_in_gv, FALSE); /* now it does*/
a0d0e21e
LW
1588 }
1589 }
0d44d22b
NC
1590 else if (type == OP_GLOB)
1591 fp = Perl_start_glob(aTHX_ POPs, io);
a0d0e21e
LW
1592 }
1593 else if (type == OP_GLOB)
1594 SP--;
a00b5bd3 1595 else if (ckWARN(WARN_IO) && IoTYPE(io) == IoTYPE_WRONLY) {
4c80c0b2 1596 report_evil_fh(PL_last_in_gv, io, OP_phoney_OUTPUT_ONLY);
a00b5bd3 1597 }
a0d0e21e
LW
1598 }
1599 if (!fp) {
041457d9
DM
1600 if ((!io || !(IoFLAGS(io) & IOf_START))
1601 && ckWARN2(WARN_GLOB, WARN_CLOSED))
1602 {
3f4520fe 1603 if (type == OP_GLOB)
9014280d 1604 Perl_warner(aTHX_ packWARN(WARN_GLOB),
af8c498a
GS
1605 "glob failed (can't start child: %s)",
1606 Strerror(errno));
69282e91 1607 else
bc37a18f 1608 report_evil_fh(PL_last_in_gv, io, PL_op->op_type);
3f4520fe 1609 }
54310121 1610 if (gimme == G_SCALAR) {
79628082 1611 /* undef TARG, and push that undefined value */
ba92458f
AE
1612 if (type != OP_RCATLINE) {
1613 SV_CHECK_THINKFIRST_COW_DROP(TARG);
0c34ef67 1614 SvOK_off(TARG);
ba92458f 1615 }
a0d0e21e
LW
1616 PUSHTARG;
1617 }
1618 RETURN;
1619 }
a2008d6d 1620 have_fp:
54310121 1621 if (gimme == G_SCALAR) {
a0d0e21e 1622 sv = TARG;
0f722b55
RGS
1623 if (type == OP_RCATLINE && SvGMAGICAL(sv))
1624 mg_get(sv);
48de12d9
RGS
1625 if (SvROK(sv)) {
1626 if (type == OP_RCATLINE)
1627 SvPV_force_nolen(sv);
1628 else
1629 sv_unref(sv);
1630 }
f7877b28
NC
1631 else if (isGV_with_GP(sv)) {
1632 SvPV_force_nolen(sv);
1633 }
862a34c6 1634 SvUPGRADE(sv, SVt_PV);
a0d0e21e 1635 tmplen = SvLEN(sv); /* remember if already alloced */
bc44a8a2 1636 if (!tmplen && !SvREADONLY(sv))
a0d0e21e 1637 Sv_Grow(sv, 80); /* try short-buffering it */
2b5e58c4
AMS
1638 offset = 0;
1639 if (type == OP_RCATLINE && SvOK(sv)) {
1640 if (!SvPOK(sv)) {
8b6b16e7 1641 SvPV_force_nolen(sv);
2b5e58c4 1642 }
a0d0e21e 1643 offset = SvCUR(sv);
2b5e58c4 1644 }
a0d0e21e 1645 }
54310121 1646 else {
561b68a9 1647 sv = sv_2mortal(newSV(80));
54310121
PP
1648 offset = 0;
1649 }
fbad3eb5 1650
3887d568
AP
1651 /* This should not be marked tainted if the fp is marked clean */
1652#define MAYBE_TAINT_LINE(io, sv) \
1653 if (!(IoFLAGS(io) & IOf_UNTAINT)) { \
1654 TAINT; \
1655 SvTAINTED_on(sv); \
1656 }
1657
684bef36 1658/* delay EOF state for a snarfed empty file */
fbad3eb5 1659#define SNARF_EOF(gimme,rs,io,sv) \
684bef36 1660 (gimme != G_SCALAR || SvCUR(sv) \
b9fee9ba 1661 || (IoFLAGS(io) & IOf_NOLINE) || !RsSNARF(rs))
fbad3eb5 1662
a0d0e21e 1663 for (;;) {
09e8efcc 1664 PUTBACK;
fbad3eb5 1665 if (!sv_gets(sv, fp, offset)
2d726892
TF
1666 && (type == OP_GLOB
1667 || SNARF_EOF(gimme, PL_rs, io, sv)
1668 || PerlIO_error(fp)))
fbad3eb5 1669 {
760ac839 1670 PerlIO_clearerr(fp);
a0d0e21e 1671 if (IoFLAGS(io) & IOf_ARGV) {
3280af22 1672 fp = nextargv(PL_last_in_gv);
a0d0e21e
LW
1673 if (fp)
1674 continue;
3280af22 1675 (void)do_close(PL_last_in_gv, FALSE);
a0d0e21e
LW
1676 }
1677 else if (type == OP_GLOB) {
e476b1b5 1678 if (!do_close(PL_last_in_gv, FALSE) && ckWARN(WARN_GLOB)) {
9014280d 1679 Perl_warner(aTHX_ packWARN(WARN_GLOB),
4eb79ab5 1680 "glob failed (child exited with status %d%s)",
894356b3 1681 (int)(STATUS_CURRENT >> 8),
cf494569 1682 (STATUS_CURRENT & 0x80) ? ", core dumped" : "");
4eb79ab5 1683 }
a0d0e21e 1684 }
54310121 1685 if (gimme == G_SCALAR) {
ba92458f
AE
1686 if (type != OP_RCATLINE) {
1687 SV_CHECK_THINKFIRST_COW_DROP(TARG);
0c34ef67 1688 SvOK_off(TARG);
ba92458f 1689 }
09e8efcc 1690 SPAGAIN;
a0d0e21e
LW
1691 PUSHTARG;
1692 }
3887d568 1693 MAYBE_TAINT_LINE(io, sv);
a0d0e21e
LW
1694 RETURN;
1695 }
3887d568 1696 MAYBE_TAINT_LINE(io, sv);
a0d0e21e 1697 IoLINES(io)++;
b9fee9ba 1698 IoFLAGS(io) |= IOf_NOLINE;
71be2cbc 1699 SvSETMAGIC(sv);
09e8efcc 1700 SPAGAIN;
a0d0e21e 1701 XPUSHs(sv);
a0d0e21e 1702 if (type == OP_GLOB) {
349d4f2f 1703 const char *t1;
a0d0e21e 1704
3280af22 1705 if (SvCUR(sv) > 0 && SvCUR(PL_rs) > 0) {
6136c704 1706 char * const tmps = SvEND(sv) - 1;
aa07b2f6 1707 if (*tmps == *SvPVX_const(PL_rs)) {
c07a80fd 1708 *tmps = '\0';
b162af07 1709 SvCUR_set(sv, SvCUR(sv) - 1);
c07a80fd
PP
1710 }
1711 }
349d4f2f
NC
1712 for (t1 = SvPVX_const(sv); *t1; t1++)
1713 if (!isALPHA(*t1) && !isDIGIT(*t1) &&
1714 strchr("$&*(){}[]'\";\\|?<>~`", *t1))
a0d0e21e 1715 break;
349d4f2f 1716 if (*t1 && PerlLIO_lstat(SvPVX_const(sv), &PL_statbuf) < 0) {
a0d0e21e
LW
1717 (void)POPs; /* Unmatched wildcard? Chuck it... */
1718 continue;
1719 }
2d79bf7f 1720 } else if (SvUTF8(sv)) { /* OP_READLINE, OP_RCATLINE */
d4c19fe8
AL
1721 if (ckWARN(WARN_UTF8)) {
1722 const U8 * const s = (const U8*)SvPVX_const(sv) + offset;
1723 const STRLEN len = SvCUR(sv) - offset;
1724 const U8 *f;
1725
1726 if (!is_utf8_string_loc(s, len, &f))
1727 /* Emulate :encoding(utf8) warning in the same case. */
1728 Perl_warner(aTHX_ packWARN(WARN_UTF8),
1729 "utf8 \"\\x%02X\" does not map to Unicode",
1730 f < (U8*)SvEND(sv) ? *f : 0);
1731 }
a0d0e21e 1732 }
54310121 1733 if (gimme == G_ARRAY) {
a0d0e21e 1734 if (SvLEN(sv) - SvCUR(sv) > 20) {
1da4ca5f 1735 SvPV_shrink_to_cur(sv);
a0d0e21e 1736 }
561b68a9 1737 sv = sv_2mortal(newSV(80));
a0d0e21e
LW
1738 continue;
1739 }
54310121 1740 else if (gimme == G_SCALAR && !tmplen && SvLEN(sv) - SvCUR(sv) > 80) {
a0d0e21e 1741 /* try to reclaim a bit of scalar space (only on 1st alloc) */
d5b5861b
NC
1742 const STRLEN new_len
1743 = SvCUR(sv) < 60 ? 80 : SvCUR(sv)+40; /* allow some slop */
1da4ca5f 1744 SvPV_renew(sv, new_len);
a0d0e21e
LW
1745 }
1746 RETURN;
1747 }
1748}
1749
1750PP(pp_enter)
1751{
27da23d5 1752 dVAR; dSP;
c09156bb 1753 register PERL_CONTEXT *cx;
533c011a 1754 I32 gimme = OP_GIMME(PL_op, -1);
a0d0e21e 1755
54310121 1756 if (gimme == -1) {
e91684bf
VP
1757 if (cxstack_ix >= 0) {
1758 /* If this flag is set, we're just inside a return, so we should
1759 * store the caller's context */
1760 gimme = (PL_op->op_flags & OPf_SPECIAL)
1761 ? block_gimme()
1762 : cxstack[cxstack_ix].blk_gimme;
1763 } else
54310121
PP
1764 gimme = G_SCALAR;
1765 }
a0d0e21e
LW
1766
1767 ENTER;
1768
1769 SAVETMPS;
924508f0 1770 PUSHBLOCK(cx, CXt_BLOCK, SP);
a0d0e21e
LW
1771
1772 RETURN;
1773}
1774
1775PP(pp_helem)
1776{
97aff369 1777 dVAR; dSP;
760ac839 1778 HE* he;
ae77835f 1779 SV **svp;
c445ea15 1780 SV * const keysv = POPs;
85fbaab2 1781 HV * const hv = MUTABLE_HV(POPs);
a3b680e6
AL
1782 const U32 lval = PL_op->op_flags & OPf_MOD || LVRET;
1783 const U32 defer = PL_op->op_private & OPpLVAL_DEFER;
be6c24e0 1784 SV *sv;
c158a4fd 1785 const U32 hash = (SvIsCOW_shared_hash(keysv)) ? SvSHARED_HASH(keysv) : 0;
9c5ffd7c 1786 I32 preeminent = 0;
a0d0e21e 1787
d4c19fe8 1788 if (SvTYPE(hv) != SVt_PVHV)
a0d0e21e 1789 RETPUSHUNDEF;
d4c19fe8
AL
1790
1791 if (PL_op->op_private & OPpLVAL_INTRO) {
1792 MAGIC *mg;
1793 HV *stash;
1794 /* does the element we're localizing already exist? */
1795 preeminent = /* can we determine whether it exists? */
1796 ( !SvRMAGICAL(hv)
ad64d0ec
NC
1797 || mg_find((const SV *)hv, PERL_MAGIC_env)
1798 || ( (mg = mg_find((const SV *)hv, PERL_MAGIC_tied))
d4c19fe8
AL
1799 /* Try to preserve the existenceness of a tied hash
1800 * element by using EXISTS and DELETE if possible.
1801 * Fallback to FETCH and STORE otherwise */
ad64d0ec 1802 && (stash = SvSTASH(SvRV(SvTIED_obj(MUTABLE_SV(hv), mg))))
d4c19fe8
AL
1803 && gv_fetchmethod_autoload(stash, "EXISTS", TRUE)
1804 && gv_fetchmethod_autoload(stash, "DELETE", TRUE)
1805 )
1806 ) ? hv_exists_ent(hv, keysv, 0) : 1;
1807 }
1808 he = hv_fetch_ent(hv, keysv, lval && !defer, hash);
1809 svp = he ? &HeVAL(he) : NULL;
a0d0e21e 1810 if (lval) {
3280af22 1811 if (!svp || *svp == &PL_sv_undef) {
68dc0745
PP
1812 SV* lv;
1813 SV* key2;
2d8e6c8d 1814 if (!defer) {
be2597df 1815 DIE(aTHX_ PL_no_helem_sv, SVfARG(keysv));
2d8e6c8d 1816 }
68dc0745
PP
1817 lv = sv_newmortal();
1818 sv_upgrade(lv, SVt_PVLV);
1819 LvTYPE(lv) = 'y';
6136c704 1820 sv_magic(lv, key2 = newSVsv(keysv), PERL_MAGIC_defelem, NULL, 0);
68dc0745 1821 SvREFCNT_dec(key2); /* sv_magic() increments refcount */
b37c2d43 1822 LvTARG(lv) = SvREFCNT_inc_simple(hv);
68dc0745
PP
1823 LvTARGLEN(lv) = 1;
1824 PUSHs(lv);
1825 RETURN;
1826 }
533c011a 1827 if (PL_op->op_private & OPpLVAL_INTRO) {
bfcb3514 1828 if (HvNAME_get(hv) && isGV(*svp))
159b6efe 1829 save_gp(MUTABLE_GV(*svp), !(PL_op->op_flags & OPf_SPECIAL));
1f5346dc
SC
1830 else {
1831 if (!preeminent) {
1832 STRLEN keylen;
e62f0680 1833 const char * const key = SvPV_const(keysv, keylen);
7d654f43 1834 SAVEDELETE(hv, savepvn(key,keylen),
bb7a0f54 1835 SvUTF8(keysv) ? -(I32)keylen : (I32)keylen);
bfc4de9f 1836 } else
af7df257
CS
1837 save_helem_flags(hv, keysv, svp,
1838 (PL_op->op_flags & OPf_SPECIAL) ? 0 : SAVEf_SETMAGIC);
1f5346dc 1839 }
5f05dabc 1840 }
533c011a
NIS
1841 else if (PL_op->op_private & OPpDEREF)
1842 vivify_ref(*svp, PL_op->op_private & OPpDEREF);
a0d0e21e 1843 }
3280af22 1844 sv = (svp ? *svp : &PL_sv_undef);
be6c24e0
GS
1845 /* This makes C<local $tied{foo} = $tied{foo}> possible.
1846 * Pushing the magical RHS on to the stack is useless, since
1847 * that magic is soon destined to be misled by the local(),
1848 * and thus the later pp_sassign() will fail to mg_get() the
1849 * old value. This should also cure problems with delayed
1850 * mg_get()s. GSAR 98-07-03 */
1851 if (!lval && SvGMAGICAL(sv))
1852 sv = sv_mortalcopy(sv);
1853 PUSHs(sv);
a0d0e21e
LW
1854 RETURN;
1855}
1856
1857PP(pp_leave)
1858{
27da23d5 1859 dVAR; dSP;
c09156bb 1860 register PERL_CONTEXT *cx;
a0d0e21e
LW
1861 SV **newsp;
1862 PMOP *newpm;
1863 I32 gimme;
1864
533c011a 1865 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e 1866 cx = &cxstack[cxstack_ix];
3280af22 1867 cx->blk_oldpm = PL_curpm; /* fake block should preserve $1 et al */
a0d0e21e
LW
1868 }
1869
1870 POPBLOCK(cx,newpm);
1871
e91684bf 1872 gimme = OP_GIMME(PL_op, (cxstack_ix >= 0) ? gimme : G_SCALAR);
a0d0e21e 1873
a1f49e72 1874 TAINT_NOT;
54310121
PP
1875 if (gimme == G_VOID)
1876 SP = newsp;
1877 else if (gimme == G_SCALAR) {
a3b680e6 1878 register SV **mark;
54310121 1879 MARK = newsp + 1;
09256e2f 1880 if (MARK <= SP) {
54310121
PP
1881 if (SvFLAGS(TOPs) & (SVs_PADTMP|SVs_TEMP))
1882 *MARK = TOPs;
1883 else
1884 *MARK = sv_mortalcopy(TOPs);
09256e2f 1885 } else {
54310121 1886 MEXTEND(mark,0);
3280af22 1887 *MARK = &PL_sv_undef;
a0d0e21e 1888 }
54310121 1889 SP = MARK;
a0d0e21e 1890 }
54310121 1891 else if (gimme == G_ARRAY) {
a1f49e72 1892 /* in case LEAVE wipes old return values */
a3b680e6 1893 register SV **mark;
a1f49e72
CS
1894 for (mark = newsp + 1; mark <= SP; mark++) {
1895 if (!(SvFLAGS(*mark) & (SVs_PADTMP|SVs_TEMP))) {
a0d0e21e 1896 *mark = sv_mortalcopy(*mark);
a1f49e72
CS
1897 TAINT_NOT; /* Each item is independent */
1898 }
1899 }
a0d0e21e 1900 }
3280af22 1901 PL_curpm = newpm; /* Don't pop $1 et al till now */
a0d0e21e
LW
1902
1903 LEAVE;
1904
1905 RETURN;
1906}
1907
1908PP(pp_iter)
1909{
97aff369 1910 dVAR; dSP;
c09156bb 1911 register PERL_CONTEXT *cx;
dc09a129 1912 SV *sv, *oldsv;
1d7c1841 1913 SV **itersvp;
d01136d6
BS
1914 AV *av = NULL; /* used for LOOP_FOR on arrays and the stack */
1915 bool av_is_stack = FALSE;
a0d0e21e 1916
924508f0 1917 EXTEND(SP, 1);
a0d0e21e 1918 cx = &cxstack[cxstack_ix];
3b719c58 1919 if (!CxTYPE_is_LOOP(cx))
cea2e8a9 1920 DIE(aTHX_ "panic: pp_iter");
a0d0e21e 1921
1d7c1841 1922 itersvp = CxITERVAR(cx);
d01136d6 1923 if (CxTYPE(cx) == CXt_LOOP_LAZYSV) {
89ea2908 1924 /* string increment */
d01136d6
BS
1925 SV* cur = cx->blk_loop.state_u.lazysv.cur;
1926 SV *end = cx->blk_loop.state_u.lazysv.end;
267cc4a8
NC
1927 /* If the maximum is !SvOK(), pp_enteriter substitutes PL_sv_no.
1928 It has SvPVX of "" and SvCUR of 0, which is what we want. */
4fe3f0fa 1929 STRLEN maxlen = 0;
d01136d6 1930 const char *max = SvPV_const(end, maxlen);
89ea2908 1931 if (!SvNIOK(cur) && SvCUR(cur) <= maxlen) {
1d7c1841 1932 if (SvREFCNT(*itersvp) == 1 && !SvMAGICAL(*itersvp)) {
eaa5c2d6 1933 /* safe to reuse old SV */
1d7c1841 1934 sv_setsv(*itersvp, cur);
eaa5c2d6 1935 }
1c846c1f 1936 else
eaa5c2d6
GA
1937 {
1938 /* we need a fresh SV every time so that loop body sees a
1939 * completely new SV for closures/references to work as
1940 * they used to */
dc09a129 1941 oldsv = *itersvp;
1d7c1841 1942 *itersvp = newSVsv(cur);
dc09a129 1943 SvREFCNT_dec(oldsv);
eaa5c2d6 1944 }
aa07b2f6 1945 if (strEQ(SvPVX_const(cur), max))
89ea2908
GA
1946 sv_setiv(cur, 0); /* terminate next time */
1947 else
1948 sv_inc(cur);
1949 RETPUSHYES;
1950 }
1951 RETPUSHNO;
d01136d6
BS
1952 }
1953 else if (CxTYPE(cx) == CXt_LOOP_LAZYIV) {
89ea2908 1954 /* integer increment */
d01136d6 1955 if (cx->blk_loop.state_u.lazyiv.cur > cx->blk_loop.state_u.lazyiv.end)
89ea2908 1956 RETPUSHNO;
7f61b687 1957
3db8f154 1958 /* don't risk potential race */
1d7c1841 1959 if (SvREFCNT(*itersvp) == 1 && !SvMAGICAL(*itersvp)) {
eaa5c2d6 1960 /* safe to reuse old SV */
d01136d6 1961 sv_setiv(*itersvp, cx->blk_loop.state_u.lazyiv.cur++);
eaa5c2d6 1962 }
1c846c1f 1963 else
eaa5c2d6
GA
1964 {
1965 /* we need a fresh SV every time so that loop body sees a
1966 * completely new SV for closures/references to work as they
1967 * used to */
dc09a129 1968 oldsv = *itersvp;
d01136d6 1969 *itersvp = newSViv(cx->blk_loop.state_u.lazyiv.cur++);
dc09a129 1970 SvREFCNT_dec(oldsv);
eaa5c2d6 1971 }
a2309040
JH
1972
1973 /* Handle end of range at IV_MAX */
d01136d6
BS
1974 if ((cx->blk_loop.state_u.lazyiv.cur == IV_MIN) &&
1975 (cx->blk_loop.state_u.lazyiv.end == IV_MAX))
a2309040 1976 {
d01136d6
BS
1977 cx->blk_loop.state_u.lazyiv.cur++;
1978 cx->blk_loop.state_u.lazyiv.end++;
a2309040
JH
1979 }
1980
89ea2908
GA
1981 RETPUSHYES;
1982 }
1983
1984 /* iterate array */
d01136d6
BS
1985 assert(CxTYPE(cx) == CXt_LOOP_FOR);
1986 av = cx->blk_loop.state_u.ary.ary;
1987 if (!av) {
1988 av_is_stack = TRUE;
1989 av = PL_curstack;
1990 }
ef3e5ea9 1991 if (PL_op->op_private & OPpITER_REVERSED) {
d01136d6
BS
1992 if (cx->blk_loop.state_u.ary.ix <= (av_is_stack
1993 ? cx->blk_loop.resetsp + 1 : 0))
ef3e5ea9 1994 RETPUSHNO;
a0d0e21e 1995
ef3e5ea9 1996 if (SvMAGICAL(av) || AvREIFY(av)) {
d01136d6 1997 SV * const * const svp = av_fetch(av, --cx->blk_loop.state_u.ary.ix, FALSE);
a0714e2c 1998 sv = svp ? *svp : NULL;
ef3e5ea9
NC
1999 }
2000 else {
d01136d6 2001 sv = AvARRAY(av)[--cx->blk_loop.state_u.ary.ix];
ef3e5ea9 2002 }
d42935ef
JH
2003 }
2004 else {
d01136d6 2005 if (cx->blk_loop.state_u.ary.ix >= (av_is_stack ? cx->blk_oldsp :
ef3e5ea9
NC
2006 AvFILL(av)))
2007 RETPUSHNO;
2008
2009 if (SvMAGICAL(av) || AvREIFY(av)) {
d01136d6 2010 SV * const * const svp = av_fetch(av, ++cx->blk_loop.state_u.ary.ix, FALSE);
a0714e2c 2011 sv = svp ? *svp : NULL;
ef3e5ea9
NC
2012 }
2013 else {
d01136d6 2014 sv = AvARRAY(av)[++cx->blk_loop.state_u.ary.ix];
ef3e5ea9 2015 }
d42935ef 2016 }
ef3e5ea9 2017
0565a181 2018 if (sv && SvIS_FREED(sv)) {
a0714e2c 2019 *itersvp = NULL;
b6c83531 2020 Perl_croak(aTHX_ "Use of freed value in iteration");
cccede53
DM
2021 }
2022
d01136d6 2023 if (sv) {
a0d0e21e 2024 SvTEMP_off(sv);
d01136d6
BS
2025 SvREFCNT_inc_simple_void_NN(sv);
2026 }
a0d0e21e 2027 else
3280af22 2028 sv = &PL_sv_undef;
d01136d6
BS
2029 if (!av_is_stack && sv == &PL_sv_undef) {
2030 SV *lv = newSV_type(SVt_PVLV);
2031 LvTYPE(lv) = 'y';
2032 sv_magic(lv, NULL, PERL_MAGIC_defelem, NULL, 0);
b37c2d43 2033 LvTARG(lv) = SvREFCNT_inc_simple(av);
d01136d6 2034 LvTARGOFF(lv) = cx->blk_loop.state_u.ary.ix;
42718184 2035 LvTARGLEN(lv) = (STRLEN)UV_MAX;
d01136d6 2036 sv = lv;
5f05dabc 2037 }
a0d0e21e 2038
dc09a129 2039 oldsv = *itersvp;
d01136d6 2040 *itersvp = sv;
dc09a129
DM
2041 SvREFCNT_dec(oldsv);
2042
a0d0e21e
LW
2043 RETPUSHYES;
2044}
2045
2046PP(pp_subst)
2047{
97aff369 2048 dVAR; dSP; dTARG;
a0d0e21e
LW
2049 register PMOP *pm = cPMOP;
2050 PMOP *rpm = pm;
a0d0e21e
LW
2051 register char *s;
2052 char *strend;
2053 register char *m;
5c144d81 2054 const char *c;
a0d0e21e
LW
2055 register char *d;
2056 STRLEN clen;
2057 I32 iters = 0;
2058 I32 maxiters;
2059 register I32 i;
2060 bool once;
99710fe3 2061 U8 rxtainted;
a0d0e21e 2062 char *orig;
1ed74d04 2063 U8 r_flags;
aaa362c4 2064 register REGEXP *rx = PM_GETRE(pm);
a0d0e21e
LW
2065 STRLEN len;
2066 int force_on_match = 0;
0bcc34c2 2067 const I32 oldsave = PL_savestack_ix;
792b2c16 2068 STRLEN slen;
f272994b 2069 bool doutf8 = FALSE;
10300be4 2070 I32 matched;
f8c7b90f 2071#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
2072 bool is_cow;
2073#endif
a0714e2c 2074 SV *nsv = NULL;
a0d0e21e 2075
5cd24f17 2076 /* known replacement string? */
b37c2d43 2077 register SV *dstr = (pm->op_pmflags & PMf_CONST) ? POPs : NULL;
533c011a 2078 if (PL_op->op_flags & OPf_STACKED)
a0d0e21e 2079 TARG = POPs;
59f00321
RGS
2080 else if (PL_op->op_private & OPpTARGET_MY)
2081 GETTARGET;
a0d0e21e 2082 else {
54b9620d 2083 TARG = DEFSV;
a0d0e21e 2084 EXTEND(SP,1);
1c846c1f 2085 }
d9f424b2 2086
f8c7b90f 2087#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
2088 /* Awooga. Awooga. "bool" types that are actually char are dangerous,
2089 because they make integers such as 256 "false". */
2090 is_cow = SvIsCOW(TARG) ? TRUE : FALSE;
2091#else
765f542d
NC
2092 if (SvIsCOW(TARG))
2093 sv_force_normal_flags(TARG,0);
ed252734
NC
2094#endif
2095 if (
f8c7b90f 2096#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
2097 !is_cow &&
2098#endif
2099 (SvREADONLY(TARG)
cecf5685
NC
2100 || ( ((SvTYPE(TARG) == SVt_PVGV && isGV_with_GP(TARG))
2101 || SvTYPE(TARG) > SVt_PVLV)
4ce457a6 2102 && !(SvTYPE(TARG) == SVt_PVGV && SvFAKE(TARG)))))
f1f66076 2103 DIE(aTHX_ "%s", PL_no_modify);
8ec5e241
NIS
2104 PUTBACK;
2105
d5263905 2106 s = SvPV_mutable(TARG, len);
68dc0745 2107 if (!SvPOKp(TARG) || SvTYPE(TARG) == SVt_PVGV)
a0d0e21e 2108 force_on_match = 1;
07bc277f 2109 rxtainted = ((RX_EXTFLAGS(rx) & RXf_TAINTED) ||
3280af22
NIS
2110 (PL_tainted && (pm->op_pmflags & PMf_RETAINT)));
2111 if (PL_tainted)
b3eb6a9b 2112 rxtainted |= 2;
9212bbba 2113 TAINT_NOT;
a12c0f56 2114
a30b2f1f 2115 RX_MATCH_UTF8_set(rx, DO_UTF8(TARG));
d9f424b2 2116
a0d0e21e
LW
2117 force_it:
2118 if (!pm || !s)
2269b42e 2119 DIE(aTHX_ "panic: pp_subst");
a0d0e21e
LW
2120
2121 strend = s + len;
a30b2f1f 2122 slen = RX_MATCH_UTF8(rx) ? utf8_length((U8*)s, (U8*)strend) : len;
792b2c16
JH
2123 maxiters = 2 * slen + 10; /* We can match twice at each
2124 position, once with zero-length,
2125 second time with non-zero. */
a0d0e21e 2126
220fc49f 2127 if (!RX_PRELEN(rx) && PL_curpm) {
3280af22 2128 pm = PL_curpm;
aaa362c4 2129 rx = PM_GETRE(pm);
a0d0e21e 2130 }
07bc277f
NC
2131 r_flags = (RX_NPARENS(rx) || SvTEMP(TARG) || PL_sawampersand
2132 || (RX_EXTFLAGS(rx) & (RXf_EVAL_SEEN|RXf_PMf_KEEPCOPY)) )
ed252734 2133 ? REXEC_COPY_STR : 0;
f722798b 2134 if (SvSCREAM(TARG))
22e551b9 2135 r_flags |= REXEC_SCREAM;
7fba1cd6 2136
a0d0e21e 2137 orig = m = s;
07bc277f 2138 if (RX_EXTFLAGS(rx) & RXf_USE_INTUIT) {
ee0b7718 2139 PL_bostr = orig;
f9f4320a 2140 s = CALLREG_INTUIT_START(rx, TARG, s, strend, r_flags, NULL);
f722798b
IZ
2141
2142 if (!s)
2143 goto nope;
2144 /* How to do it in subst? */
07bc277f 2145/* if ( (RX_EXTFLAGS(rx) & RXf_CHECK_ALL)
1c846c1f 2146 && !PL_sawampersand
07bc277f
NC
2147 && !(RX_EXTFLAGS(rx) & RXf_KEEPCOPY)
2148 && ((RX_EXTFLAGS(rx) & RXf_NOSCAN)
2149 || !((RX_EXTFLAGS(rx) & RXf_INTUIT_TAIL)
f722798b
IZ
2150 && (r_flags & REXEC_SCREAM))))
2151 goto yup;
2152*/
a0d0e21e 2153 }
71be2cbc
PP
2154
2155 /* only replace once? */
a0d0e21e 2156 once = !(rpm->op_pmflags & PMf_GLOBAL);
10300be4
YO
2157 matched = CALLREGEXEC(rx, s, strend, orig, 0, TARG, NULL,
2158 r_flags | REXEC_CHECKED);
71be2cbc 2159 /* known replacement string? */
f272994b 2160 if (dstr) {
8514a05a
JH
2161 /* replacement needing upgrading? */
2162 if (DO_UTF8(TARG) && !doutf8) {
db79b45b 2163 nsv = sv_newmortal();
4a176938 2164 SvSetSV(nsv, dstr);
8514a05a
JH
2165 if (PL_encoding)
2166 sv_recode_to_utf8(nsv, PL_encoding);
2167 else
2168 sv_utf8_upgrade(nsv);
5c144d81 2169 c = SvPV_const(nsv, clen);
4a176938
JH
2170 doutf8 = TRUE;
2171 }
2172 else {
5c144d81 2173 c = SvPV_const(dstr, clen);
4a176938 2174 doutf8 = DO_UTF8(dstr);
8514a05a 2175 }
f272994b
A
2176 }
2177 else {
6136c704 2178 c = NULL;
f272994b
A
2179 doutf8 = FALSE;
2180 }
2181
71be2cbc 2182 /* can do inplace substitution? */
ed252734 2183 if (c
f8c7b90f 2184#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
2185 && !is_cow
2186#endif
07bc277f
NC
2187 && (I32)clen <= RX_MINLENRET(rx) && (once || !(r_flags & REXEC_COPY_STR))
2188 && !(RX_EXTFLAGS(rx) & RXf_LOOKBEHIND_SEEN)
db79b45b 2189 && (!doutf8 || SvUTF8(TARG))) {
10300be4 2190 if (!matched)
f722798b 2191 {
8ec5e241 2192 SPAGAIN;
3280af22 2193 PUSHs(&PL_sv_no);
71be2cbc
PP
2194 LEAVE_SCOPE(oldsave);
2195 RETURN;
2196 }
f8c7b90f 2197#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
2198 if (SvIsCOW(TARG)) {
2199 assert (!force_on_match);
2200 goto have_a_cow;
2201 }
2202#endif
71be2cbc
PP
2203 if (force_on_match) {
2204 force_on_match = 0;
2205 s = SvPV_force(TARG, len);
2206 goto force_it;
2207 }
71be2cbc 2208 d = s;
3280af22 2209 PL_curpm = pm;
71be2cbc
PP
2210 SvSCREAM_off(TARG); /* disable possible screamer */
2211 if (once) {
48c036b1 2212 rxtainted |= RX_MATCH_TAINTED(rx);
07bc277f
NC
2213 m = orig + RX_OFFS(rx)[0].start;
2214 d = orig + RX_OFFS(rx)[0].end;
71be2cbc
PP
2215 s = orig;
2216 if (m - s > strend - d) { /* faster to shorten from end */
2217 if (clen) {
2218 Copy(c, m, clen, char);
2219 m += clen;
a0d0e21e 2220 }
71be2cbc
PP
2221 i = strend - d;
2222 if (i > 0) {
2223 Move(d, m, i, char);
2224 m += i;
a0d0e21e 2225 }
71be2cbc
PP
2226 *m = '\0';
2227 SvCUR_set(TARG, m - s);
2228 }
155aba94 2229 else if ((i = m - s)) { /* faster from front */
71be2cbc
PP
2230 d -= clen;
2231 m = d;
0d3c21b0 2232 Move(s, d - i, i, char);
71be2cbc 2233 sv_chop(TARG, d-i);
71be2cbc
PP
2234 if (clen)
2235 Copy(c, m, clen, char);
2236 }
2237 else if (clen) {
2238 d -= clen;
2239 sv_chop(TARG, d);
2240 Copy(c, d, clen, char);
2241 }
2242 else {
2243 sv_chop(TARG, d);
2244 }
48c036b1 2245 TAINT_IF(rxtainted & 1);
8ec5e241 2246 SPAGAIN;
3280af22 2247 PUSHs(&PL_sv_yes);
71be2cbc
PP
2248 }
2249 else {
71be2cbc
PP
2250 do {
2251 if (iters++ > maxiters)
cea2e8a9 2252 DIE(aTHX_ "Substitution loop");
d9f97599 2253 rxtainted |= RX_MATCH_TAINTED(rx);
07bc277f 2254 m = RX_OFFS(rx)[0].start + orig;
155aba94 2255 if ((i = m - s)) {
71be2cbc
PP
2256 if (s != d)
2257 Move(s, d, i, char);
2258 d += i;
a0d0e21e 2259 }
71be2cbc
PP
2260 if (clen) {
2261 Copy(c, d, clen, char);
2262 d += clen;
2263 }
07bc277f 2264 s = RX_OFFS(rx)[0].end + orig;
f9f4320a 2265 } while (CALLREGEXEC(rx, s, strend, orig, s == m,
f722798b
IZ
2266 TARG, NULL,
2267 /* don't match same null twice */
2268 REXEC_NOT_FIRST|REXEC_IGNOREPOS));
71be2cbc
PP
2269 if (s != d) {
2270 i = strend - s;
aa07b2f6 2271 SvCUR_set(TARG, d - SvPVX_const(TARG) + i);
71be2cbc 2272 Move(s, d, i+1, char); /* include the NUL */
a0d0e21e 2273 }
48c036b1 2274 TAINT_IF(rxtainted & 1);
8ec5e241 2275 SPAGAIN;
6e449a3a 2276 mPUSHi((I32)iters);
a0d0e21e 2277 }
80b498e0 2278 (void)SvPOK_only_UTF8(TARG);
48c036b1 2279 TAINT_IF(rxtainted);
8ec5e241
NIS
2280 if (SvSMAGICAL(TARG)) {
2281 PUTBACK;
2282 mg_set(TARG);
2283 SPAGAIN;
2284 }
9212bbba 2285 SvTAINT(TARG);
aefe6dfc
JH
2286 if (doutf8)
2287 SvUTF8_on(TARG);
71be2cbc
PP
2288 LEAVE_SCOPE(oldsave);
2289 RETURN;
a0d0e21e 2290 }
71be2cbc 2291
10300be4 2292 if (matched)
f722798b 2293 {
a0d0e21e
LW
2294 if (force_on_match) {
2295 force_on_match = 0;
2296 s = SvPV_force(TARG, len);
2297 goto force_it;
2298 }
f8c7b90f 2299#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
2300 have_a_cow:
2301#endif
48c036b1 2302 rxtainted |= RX_MATCH_TAINTED(rx);
740cce10 2303 dstr = newSVpvn_utf8(m, s-m, DO_UTF8(TARG));
cff085c1 2304 SAVEFREESV(dstr);
3280af22 2305 PL_curpm = pm;
a0d0e21e 2306 if (!c) {
c09156bb 2307 register PERL_CONTEXT *cx;
8ec5e241 2308 SPAGAIN;
a0d0e21e 2309 PUSHSUBST(cx);
20e98b0f 2310 RETURNOP(cPMOP->op_pmreplrootu.op_pmreplroot);
a0d0e21e 2311 }
cf93c79d 2312 r_flags |= REXEC_IGNOREPOS | REXEC_NOT_FIRST;
a0d0e21e
LW
2313 do {
2314 if (iters++ > maxiters)
cea2e8a9 2315 DIE(aTHX_ "Substitution loop");
d9f97599 2316 rxtainted |= RX_MATCH_TAINTED(rx);
07bc277f 2317 if (RX_MATCH_COPIED(rx) && RX_SUBBEG(rx) != orig) {
a0d0e21e
LW
2318 m = s;
2319 s = orig;
07bc277f 2320 orig = RX_SUBBEG(rx);
a0d0e21e
LW
2321 s = orig + (m - s);
2322 strend = s + (strend - m);
2323 }
07bc277f 2324 m = RX_OFFS(rx)[0].start + orig;
db79b45b
JH
2325 if (doutf8 && !SvUTF8(dstr))
2326 sv_catpvn_utf8_upgrade(dstr, s, m - s, nsv);
2327 else
2328 sv_catpvn(dstr, s, m-s);
07bc277f 2329 s = RX_OFFS(rx)[0].end + orig;
a0d0e21e
LW
2330 if (clen)
2331 sv_catpvn(dstr, c, clen);
2332 if (once)
2333 break;
f9f4320a 2334 } while (CALLREGEXEC(rx, s, strend, orig, s == m,
ffc61ed2 2335 TARG, NULL, r_flags));
db79b45b
JH
2336 if (doutf8 && !DO_UTF8(TARG))
2337 sv_catpvn_utf8_upgrade(dstr, s, strend - s, nsv);
89afcb60
A
2338 else
2339 sv_catpvn(dstr, s, strend - s);
748a9306 2340
f8c7b90f 2341#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
2342 /* The match may make the string COW. If so, brilliant, because that's
2343 just saved us one malloc, copy and free - the regexp has donated
2344 the old buffer, and we malloc an entirely new one, rather than the
2345 regexp malloc()ing a buffer and copying our original, only for
2346 us to throw it away here during the substitution. */
2347 if (SvIsCOW(TARG)) {
2348 sv_force_normal_flags(TARG, SV_COW_DROP_PV);
2349 } else
2350#endif
2351 {
8bd4d4c5 2352 SvPV_free(TARG);
ed252734 2353 }
f880fe2f 2354 SvPV_set(TARG, SvPVX(dstr));
748a9306
LW
2355 SvCUR_set(TARG, SvCUR(dstr));
2356 SvLEN_set(TARG, SvLEN(dstr));
f272994b 2357 doutf8 |= DO_UTF8(dstr);
6136c704 2358 SvPV_set(dstr, NULL);
748a9306 2359
48c036b1 2360 TAINT_IF(rxtainted & 1);
f878fbec 2361 SPAGAIN;
6e449a3a 2362 mPUSHi((I32)iters);
48c036b1 2363
a0d0e21e 2364 (void)SvPOK_only(TARG);
f272994b 2365 if (doutf8)
60aeb6fd 2366 SvUTF8_on(TARG);
48c036b1 2367 TAINT_IF(rxtainted);
a0d0e21e 2368 SvSETMAGIC(TARG);
9212bbba 2369 SvTAINT(TARG);
4633a7c4 2370 LEAVE_SCOPE(oldsave);
a0d0e21e
LW
2371 RETURN;
2372 }
5cd24f17 2373 goto ret_no;
a0d0e21e
LW
2374
2375nope:
1c846c1f 2376ret_no:
8ec5e241 2377 SPAGAIN;
3280af22 2378 PUSHs(&PL_sv_no);
4633a7c4 2379 LEAVE_SCOPE(oldsave);
a0d0e21e
LW
2380 RETURN;
2381}
2382
2383PP(pp_grepwhile)
2384{
27da23d5 2385 dVAR; dSP;
a0d0e21e
LW
2386
2387 if (SvTRUEx(POPs))
3280af22
NIS
2388 PL_stack_base[PL_markstack_ptr[-1]++] = PL_stack_base[*PL_markstack_ptr];
2389 ++*PL_markstack_ptr;
a0d0e21e
LW
2390 LEAVE; /* exit inner scope */
2391
2392 /* All done yet? */
3280af22 2393 if (PL_stack_base + *PL_markstack_ptr > SP) {
a0d0e21e 2394 I32 items;
c4420975 2395 const I32 gimme = GIMME_V;
a0d0e21e
LW
2396
2397 LEAVE; /* exit outer scope */
2398 (void)POPMARK; /* pop src */
3280af22 2399 items = --*PL_markstack_ptr - PL_markstack_ptr[-1];
a0d0e21e 2400 (void)POPMARK; /* pop dst */
3280af22 2401 SP = PL_stack_base + POPMARK; /* pop original mark */
54310121 2402 if (gimme == G_SCALAR) {
7cc47870 2403 if (PL_op->op_private & OPpGREP_LEX) {
c4420975 2404 SV* const sv = sv_newmortal();
7cc47870
RGS
2405 sv_setiv(sv, items);
2406 PUSHs(sv);
2407 }
2408 else {
2409 dTARGET;
2410 XPUSHi(items);
2411 }
a0d0e21e 2412 }
54310121
PP
2413 else if (gimme == G_ARRAY)
2414 SP += items;
a0d0e21e
LW
2415 RETURN;
2416 }
2417 else {
2418 SV *src;
2419
2420 ENTER; /* enter inner scope */
1d7c1841 2421 SAVEVPTR(PL_curpm);
a0d0e21e 2422
3280af22 2423 src = PL_stack_base[*PL_markstack_ptr];
a0d0e21e 2424 SvTEMP_off(src);
59f00321
RGS
2425 if (PL_op->op_private & OPpGREP_LEX)
2426 PAD_SVl(PL_op->op_targ) = src;
2427 else
414bf5ae 2428 DEFSV_set(src);
a0d0e21e
LW
2429
2430 RETURNOP(cLOGOP->op_other);
2431 }
2432}
2433
2434PP(pp_leavesub)
2435{
27da23d5 2436 dVAR; dSP;
a0d0e21e
LW
2437 SV **mark;
2438 SV **newsp;
2439 PMOP *newpm;
2440 I32 gimme;
c09156bb 2441 register PERL_CONTEXT *cx;
b0d9ce38 2442 SV *sv;
a0d0e21e 2443
9850bf21
RH
2444 if (CxMULTICALL(&cxstack[cxstack_ix]))
2445 return 0;
2446
a0d0e21e 2447 POPBLOCK(cx,newpm);
5dd42e15 2448 cxstack_ix++; /* temporarily protect top context */
1c846c1f 2449
a1f49e72 2450 TAINT_NOT;
a0d0e21e
LW
2451 if (gimme == G_SCALAR) {
2452 MARK = newsp + 1;
a29cdaf0 2453 if (MARK <= SP) {
a8bba7fa 2454 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
a29cdaf0
IZ
2455 if (SvTEMP(TOPs)) {
2456 *MARK = SvREFCNT_inc(TOPs);
2457 FREETMPS;
2458 sv_2mortal(*MARK);
cd06dffe
GS
2459 }
2460 else {
959e3673 2461 sv = SvREFCNT_inc(TOPs); /* FREETMPS could clobber it */
a29cdaf0 2462 FREETMPS;
959e3673
GS
2463 *MARK = sv_mortalcopy(sv);
2464 SvREFCNT_dec(sv);
a29cdaf0 2465 }
cd06dffe
GS
2466 }
2467 else
a29cdaf0 2468 *MARK = SvTEMP(TOPs) ? TOPs : sv_mortalcopy(TOPs);
cd06dffe
GS
2469 }
2470 else {
f86702cc 2471 MEXTEND(MARK, 0);
3280af22 2472 *MARK = &PL_sv_undef;
a0d0e21e
LW
2473 }
2474 SP = MARK;
2475 }
54310121 2476 else if (gimme == G_ARRAY) {
f86702cc 2477 for (MARK = newsp + 1; MARK <= SP; MARK++) {
a1f49e72 2478 if (!SvTEMP(*MARK)) {
f86702cc 2479 *MARK = sv_mortalcopy(*MARK);
a1f49e72
CS
2480 TAINT_NOT; /* Each item is independent */
2481 }
f86702cc 2482 }
a0d0e21e 2483 }
f86702cc 2484 PUTBACK;
1c846c1f 2485
5dd42e15
DM
2486 LEAVE;
2487 cxstack_ix--;
b0d9ce38 2488 POPSUB(cx,sv); /* Stack values are safe: release CV and @_ ... */
3280af22 2489 PL_curpm = newpm; /* ... and pop $1 et al */
a0d0e21e 2490
b0d9ce38 2491 LEAVESUB(sv);
f39bc417 2492 return cx->blk_sub.retop;
a0d0e21e
LW
2493}
2494
cd06dffe
GS
2495/* This duplicates the above code because the above code must not
2496 * get any slower by more conditions */
2497PP(pp_leavesublv)
2498{
27da23d5 2499 dVAR; dSP;
cd06dffe
GS
2500 SV **mark;
2501 SV **newsp;
2502 PMOP *newpm;
2503 I32 gimme;
2504 register PERL_CONTEXT *cx;
b0d9ce38 2505 SV *sv;
cd06dffe 2506
9850bf21
RH
2507 if (CxMULTICALL(&cxstack[cxstack_ix]))
2508 return 0;
2509
cd06dffe 2510 POPBLOCK(cx,newpm);
5dd42e15 2511 cxstack_ix++; /* temporarily protect top context */
1c846c1f 2512
cd06dffe
GS
2513 TAINT_NOT;
2514
bafb2adc 2515 if (CxLVAL(cx) & OPpENTERSUB_INARGS) {
cd06dffe
GS
2516 /* We are an argument to a function or grep().
2517 * This kind of lvalueness was legal before lvalue
2518 * subroutines too, so be backward compatible:
2519 * cannot report errors. */
2520
2521 /* Scalar context *is* possible, on the LHS of -> only,
2522 * as in f()->meth(). But this is not an lvalue. */
2523 if (gimme == G_SCALAR)
2524 goto temporise;
2525 if (gimme == G_ARRAY) {
a8bba7fa 2526 if (!CvLVALUE(cx->blk_sub.cv))
cd06dffe
GS
2527 goto temporise_array;
2528 EXTEND_MORTAL(SP - newsp);
2529 for (mark = newsp + 1; mark <= SP; mark++) {
2530 if (SvTEMP(*mark))
6f207bd3 2531 NOOP;
cd06dffe
GS
2532 else if (SvFLAGS(*mark) & (SVs_PADTMP | SVf_READONLY))
2533 *mark = sv_mortalcopy(*mark);
2534 else {
2535 /* Can be a localized value subject to deletion. */
2536 PL_tmps_stack[++PL_tmps_ix] = *mark;
b37c2d43 2537 SvREFCNT_inc_void(*mark);
cd06dffe
GS
2538 }
2539 }
2540 }
2541 }
bafb2adc 2542 else if (CxLVAL(cx)) { /* Leave it as it is if we can. */
cd06dffe
GS
2543 /* Here we go for robustness, not for speed, so we change all
2544 * the refcounts so the caller gets a live guy. Cannot set
2545 * TEMP, so sv_2mortal is out of question. */
a8bba7fa 2546 if (!CvLVALUE(cx->blk_sub.cv)) {
5dd42e15
DM
2547 LEAVE;
2548 cxstack_ix--;
b0d9ce38 2549 POPSUB(cx,sv);
d470f89e 2550 PL_curpm = newpm;
b0d9ce38 2551 LEAVESUB(sv);
d470f89e
GS
2552 DIE(aTHX_ "Can't modify non-lvalue subroutine call");
2553 }
cd06dffe
GS
2554 if (gimme == G_SCALAR) {
2555 MARK = newsp + 1;
2556 EXTEND_MORTAL(1);
2557 if (MARK == SP) {
f9bc45ef
TP
2558 /* Temporaries are bad unless they happen to be elements
2559 * of a tied hash or array */
2560 if (SvFLAGS(TOPs) & (SVs_TEMP | SVs_PADTMP | SVf_READONLY) &&
2561 !(SvRMAGICAL(TOPs) && mg_find(TOPs, PERL_MAGIC_tiedelem))) {
5dd42e15
DM
2562 LEAVE;
2563 cxstack_ix--;
b0d9ce38 2564 POPSUB(cx,sv);
d470f89e 2565 PL_curpm = newpm;
b0d9ce38 2566 LEAVESUB(sv);
e9f19e3c
HS
2567 DIE(aTHX_ "Can't return %s from lvalue subroutine",
2568 SvREADONLY(TOPs) ? (TOPs == &PL_sv_undef) ? "undef"
2569 : "a readonly value" : "a temporary");
d470f89e 2570 }
cd06dffe
GS
2571 else { /* Can be a localized value
2572 * subject to deletion. */
2573 PL_tmps_stack[++PL_tmps_ix] = *mark;
b37c2d43 2574 SvREFCNT_inc_void(*mark);
cd06dffe
GS
2575 }
2576 }
d470f89e 2577 else { /* Should not happen? */
5dd42e15
DM
2578 LEAVE;
2579 cxstack_ix--;
b0d9ce38 2580 POPSUB(cx,sv);
d470f89e 2581 PL_curpm = newpm;
b0d9ce38 2582 LEAVESUB(sv);
d470f89e 2583 DIE(aTHX_ "%s returned from lvalue subroutine in scalar context",
cd06dffe 2584 (MARK > SP ? "Empty array" : "Array"));
d470f89e 2585 }
cd06dffe
GS
2586 SP = MARK;
2587 }
2588 else if (gimme == G_ARRAY) {
2589 EXTEND_MORTAL(SP - newsp);
2590 for (mark = newsp + 1; mark <= SP; mark++) {
f206cdda
AMS
2591 if (*mark != &PL_sv_undef
2592 && SvFLAGS(*mark) & (SVs_TEMP | SVs_PADTMP | SVf_READONLY)) {
d470f89e
GS
2593 /* Might be flattened array after $#array = */
2594 PUTBACK;
5dd42e15
DM
2595 LEAVE;
2596 cxstack_ix--;
b0d9ce38 2597 POPSUB(cx,sv);
d470f89e 2598 PL_curpm = newpm;
b0d9ce38 2599 LEAVESUB(sv);
f206cdda
AMS
2600 DIE(aTHX_ "Can't return a %s from lvalue subroutine",
2601 SvREADONLY(TOPs) ? "readonly value" : "temporary");
d470f89e 2602 }
cd06dffe 2603 else {
cd06dffe
GS
2604 /* Can be a localized value subject to deletion. */
2605 PL_tmps_stack[++PL_tmps_ix] = *mark;
b37c2d43 2606 SvREFCNT_inc_void(*mark);
cd06dffe
GS
2607 }
2608 }
2609 }
2610 }
2611 else {
2612 if (gimme == G_SCALAR) {
2613 temporise:
2614 MARK = newsp + 1;
2615 if (MARK <= SP) {
a8bba7fa 2616 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
cd06dffe
GS
2617 if (SvTEMP(TOPs)) {
2618 *MARK = SvREFCNT_inc(TOPs);
2619 FREETMPS;
2620 sv_2mortal(*MARK);
2621 }
2622 else {
959e3673 2623 sv = SvREFCNT_inc(TOPs); /* FREETMPS could clobber it */
cd06dffe 2624 FREETMPS;
959e3673
GS
2625 *MARK = sv_mortalcopy(sv);
2626 SvREFCNT_dec(sv);
cd06dffe
GS
2627 }
2628 }
2629 else
2630 *MARK = SvTEMP(TOPs) ? TOPs : sv_mortalcopy(TOPs);
2631 }
2632 else {
2633 MEXTEND(MARK, 0);
2634 *MARK = &PL_sv_undef;
2635 }
2636 SP = MARK;
2637 }
2638 else if (gimme == G_ARRAY) {
2639 temporise_array:
2640 for (MARK = newsp + 1; MARK <= SP; MARK++) {
2641 if (!SvTEMP(*MARK)) {
2642 *MARK = sv_mortalcopy(*MARK);
2643 TAINT_NOT; /* Each item is independent */
2644 }
2645 }
2646 }
2647 }
2648 PUTBACK;
1c846c1f 2649
5dd42e15
DM
2650 LEAVE;
2651 cxstack_ix--;
b0d9ce38 2652 POPSUB(cx,sv); /* Stack values are safe: release CV and @_ ... */
cd06dffe
GS
2653 PL_curpm = newpm; /* ... and pop $1 et al */
2654
b0d9ce38 2655 LEAVESUB(sv);
f39bc417 2656 return cx->blk_sub.retop;
cd06dffe
GS
2657}
2658
a0d0e21e
LW
2659PP(pp_entersub)
2660{
27da23d5 2661 dVAR; dSP; dPOPss;
a0d0e21e 2662 GV *gv;
a0d0e21e 2663 register CV *cv;
c09156bb 2664 register PERL_CONTEXT *cx;
5d94fbed 2665 I32 gimme;
a9c4fd4e 2666 const bool hasargs = (PL_op->op_flags & OPf_STACKED) != 0;
a0d0e21e
LW
2667
2668 if (!sv)
cea2e8a9 2669 DIE(aTHX_ "Not a CODE reference");
a0d0e21e 2670 switch (SvTYPE(sv)) {
f1025168
NC
2671 /* This is overwhelming the most common case: */
2672 case SVt_PVGV:
6e592b3a
BM
2673 if (!isGV_with_GP(sv))
2674 DIE(aTHX_ "Not a CODE reference");
159b6efe 2675 if (!(cv = GvCVu((const GV *)sv))) {
f730a42d 2676 HV *stash;
f2c0649b 2677 cv = sv_2cv(sv, &stash, &gv, 0);
f730a42d 2678 }
f1025168
NC
2679 if (!cv) {
2680 ENTER;
2681 SAVETMPS;
2682 goto try_autoload;
2683 }
2684 break;
a0d0e21e
LW
2685 default:
2686 if (!SvROK(sv)) {
a9c4fd4e 2687 const char *sym;
780a5241 2688 STRLEN len;
3280af22 2689 if (sv == &PL_sv_yes) { /* unfound import, ignore */
fb73857a 2690 if (hasargs)
3280af22 2691 SP = PL_stack_base + POPMARK;
a0d0e21e 2692 RETURN;
fb73857a 2693 }
15ff848f
CS
2694 if (SvGMAGICAL(sv)) {
2695 mg_get(sv);
f5f1d18e
AMS
2696 if (SvROK(sv))
2697 goto got_rv;
780a5241
NC
2698 if (SvPOKp(sv)) {
2699 sym = SvPVX_const(sv);
2700 len = SvCUR(sv);
2701 } else {
2702 sym = NULL;
2703 len = 0;
2704 }
15ff848f 2705 }
a9c4fd4e 2706 else {
780a5241 2707 sym = SvPV_const(sv, len);
a9c4fd4e 2708 }
15ff848f 2709 if (!sym)
cea2e8a9 2710 DIE(aTHX_ PL_no_usym, "a subroutine");
533c011a 2711 if (PL_op->op_private & HINT_STRICT_REFS)
cea2e8a9 2712 DIE(aTHX_ PL_no_symref, sym, "a subroutine");
780a5241 2713 cv = get_cvn_flags(sym, len, GV_ADD|SvUTF8(sv));
a0d0e21e
LW
2714 break;
2715 }
f5f1d18e 2716 got_rv:
f5284f61 2717 {
823a54a3 2718 SV * const * sp = &sv; /* Used in tryAMAGICunDEREF macro. */
f5284f61
IZ
2719 tryAMAGICunDEREF(to_cv);
2720 }
ea726b52 2721 cv = MUTABLE_CV(SvRV(sv));
a0d0e21e
LW
2722 if (SvTYPE(cv) == SVt_PVCV)
2723 break;
2724 /* FALL THROUGH */
2725 case SVt_PVHV:
2726 case SVt_PVAV:
cea2e8a9 2727 DIE(aTHX_ "Not a CODE reference");
f1025168 2728 /* This is the second most common case: */
a0d0e21e 2729 case SVt_PVCV:
ea726b52 2730 cv = MUTABLE_CV(sv);
a0d0e21e 2731 break;
a0d0e21e
LW
2732 }
2733
2734 ENTER;
2735 SAVETMPS;
2736
2737 retry:
a0d0e21e 2738 if (!CvROOT(cv) && !CvXSUB(cv)) {
2f349aa0
NC
2739 GV* autogv;
2740 SV* sub_name;
2741
2742 /* anonymous or undef'd function leaves us no recourse */
2743 if (CvANON(cv) || !(gv = CvGV(cv)))
2744 DIE(aTHX_ "Undefined subroutine called");
2745
2746 /* autoloaded stub? */
2747 if (cv != GvCV(gv)) {
2748 cv = GvCV(gv);
2749 }
2750 /* should call AUTOLOAD now? */
2751 else {
7e623da3 2752try_autoload:
2f349aa0 2753 if ((autogv = gv_autoload4(GvSTASH(gv), GvNAME(gv), GvNAMELEN(gv),
7e623da3 2754 FALSE)))
2f349aa0
NC
2755 {
2756 cv = GvCV(autogv);
2757 }
2758 /* sorry */
2759 else {
2760 sub_name = sv_newmortal();
6136c704 2761 gv_efullname3(sub_name, gv, NULL);
be2597df 2762 DIE(aTHX_ "Undefined subroutine &%"SVf" called", SVfARG(sub_name));
2f349aa0
NC
2763 }
2764 }
2765 if (!cv)
2766 DIE(aTHX_ "Not a CODE reference");
2767 goto retry;
a0d0e21e
LW
2768 }
2769
54310121 2770 gimme = GIMME_V;
67caa1fe 2771 if ((PL_op->op_private & OPpENTERSUB_DB) && GvCV(PL_DBsub) && !CvNODEBUG(cv)) {
005a8a35 2772 Perl_get_db_sub(aTHX_ &sv, cv);
a9ef256d
NC
2773 if (CvISXSUB(cv))
2774 PL_curcopdb = PL_curcop;
1ad62f64 2775 if (CvLVALUE(cv)) {
2776 /* check for lsub that handles lvalue subroutines */
2777 cv = GvCV(gv_HVadd(gv_fetchpv("DB::lsub", GV_ADDMULTI, SVt_PVHV)));
2778 /* if lsub not found then fall back to DB::sub */
2779 if (!cv) cv = GvCV(PL_DBsub);
2780 } else {
2781 cv = GvCV(PL_DBsub);
2782 }
a9ef256d 2783
ccafdc96
RGS
2784 if (!cv || (!CvXSUB(cv) && !CvSTART(cv)))
2785 DIE(aTHX_ "No DB::sub routine defined");
67caa1fe 2786 }
a0d0e21e 2787
aed2304a 2788 if (!(CvISXSUB(cv))) {
f1025168 2789 /* This path taken at least 75% of the time */
a0d0e21e
LW
2790 dMARK;
2791 register I32 items = SP - MARK;
0bcc34c2 2792 AV* const padlist = CvPADLIST(cv);
a0d0e21e
LW
2793 PUSHBLOCK(cx, CXt_SUB, MARK);
2794 PUSHSUB(cx);
f39bc417 2795 cx->blk_sub.retop = PL_op->op_next;
a0d0e21e 2796 CvDEPTH(cv)++;
6b35e009
GS
2797 /* XXX This would be a natural place to set C<PL_compcv = cv> so
2798 * that eval'' ops within this sub know the correct lexical space.
a3985cdc
DM
2799 * Owing the speed considerations, we choose instead to search for
2800 * the cv using find_runcv() when calling doeval().
6b35e009 2801 */
3a76ca88
RGS
2802 if (CvDEPTH(cv) >= 2) {
2803 PERL_STACK_OVERFLOW_CHECK();
2804 pad_push(padlist, CvDEPTH(cv));
a0d0e21e 2805 }
3a76ca88
RGS
2806 SAVECOMPPAD();
2807 PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv));
2808 if (hasargs) {
502c6561 2809 AV *const av = MUTABLE_AV(PAD_SVl(0));
221373f0
GS
2810 if (AvREAL(av)) {
2811 /* @_ is normally not REAL--this should only ever
2812 * happen when DB::sub() calls things that modify @_ */
2813 av_clear(av);
2814 AvREAL_off(av);
2815 AvREIFY_on(av);
2816 }
3280af22 2817 cx->blk_sub.savearray = GvAV(PL_defgv);
502c6561 2818 GvAV(PL_defgv) = MUTABLE_AV(SvREFCNT_inc_simple(av));
dd2155a4 2819 CX_CURPAD_SAVE(cx->blk_sub);
6d4ff0d2 2820 cx->blk_sub.argarray = av;
a0d0e21e
LW
2821 ++MARK;
2822
2823 if (items > AvMAX(av) + 1) {
504618e9 2824 SV **ary = AvALLOC(av);
a0d0e21e
LW
2825 if (AvARRAY(av) != ary) {
2826 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
9c6bc640 2827 AvARRAY(av) = ary;
a0d0e21e
LW
2828 }
2829 if (items > AvMAX(av) + 1) {
2830 AvMAX(av) = items - 1;
2831 Renew(ary,items,SV*);
2832 AvALLOC(av) = ary;
9c6bc640 2833 AvARRAY(av) = ary;
a0d0e21e
LW
2834 }
2835 }
2836 Copy(MARK,AvARRAY(av),items,SV*);
93965878 2837 AvFILLp(av) = items - 1;
1c846c1f 2838
a0d0e21e
LW
2839 while (items--) {
2840 if (*MARK)
2841 SvTEMP_off(*MARK);
2842 MARK++;
2843 }
2844 }
4a925ff6
GS
2845 /* warning must come *after* we fully set up the context
2846 * stuff so that __WARN__ handlers can safely dounwind()
2847 * if they want to
2848 */
2b9dff67 2849 if (CvDEPTH(cv) == PERL_SUB_DEPTH_WARN && ckWARN(WARN_RECURSION)
4a925ff6
GS
2850 && !(PERLDB_SUB && cv == GvCV(PL_DBsub)))
2851 sub_crush_depth(cv);
a0d0e21e
LW
2852 RETURNOP(CvSTART(cv));
2853 }
f1025168 2854 else {
3a76ca88 2855 I32 markix = TOPMARK;
f1025168 2856
3a76ca88 2857 PUTBACK;
f1025168 2858
3a76ca88
RGS
2859 if (!hasargs) {
2860 /* Need to copy @_ to stack. Alternative may be to
2861 * switch stack to @_, and copy return values
2862 * back. This would allow popping @_ in XSUB, e.g.. XXXX */
2863 AV * const av = GvAV(PL_defgv);
2864 const I32 items = AvFILLp(av) + 1; /* @_ is not tieable */
2865
2866 if (items) {
2867 /* Mark is at the end of the stack. */
2868 EXTEND(SP, items);
2869 Copy(AvARRAY(av), SP + 1, items, SV*);
2870 SP += items;
2871 PUTBACK ;
2872 }
2873 }
2874 /* We assume first XSUB in &DB::sub is the called one. */
2875 if (PL_curcopdb) {
2876 SAVEVPTR(PL_curcop);
2877 PL_curcop = PL_curcopdb;
2878 PL_curcopdb = NULL;
2879 }
2880 /* Do we need to open block here? XXXX */
2881 if (CvXSUB(cv)) /* XXX this is supposed to be true */
2882 (void)(*CvXSUB(cv))(aTHX_ cv);
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 }
f1025168
NC
2892 LEAVE;
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));
be6c24e0 2921 SV *sv;
a0d0e21e 2922
e35c1634 2923 if (SvROK(elemsv) && !SvGAMAGIC(elemsv) && ckWARN(WARN_MISC))
95b63a38
JH
2924 Perl_warner(aTHX_ packWARN(WARN_MISC),
2925 "Use of reference \"%"SVf"\" as array index",
be2597df 2926 SVfARG(elemsv));
748a9306 2927 if (elem > 0)
fc15ae8f 2928 elem -= CopARYBASE_get(PL_curcop);
a0d0e21e
LW
2929 if (SvTYPE(av) != SVt_PVAV)
2930 RETPUSHUNDEF;
68dc0745 2931 svp = av_fetch(av, elem, lval && !defer);
a0d0e21e 2932 if (lval) {
2b573ace 2933#ifdef PERL_MALLOC_WRAP
2b573ace 2934 if (SvUOK(elemsv)) {
a9c4fd4e 2935 const UV uv = SvUV(elemsv);
2b573ace
JH
2936 elem = uv > IV_MAX ? IV_MAX : uv;
2937 }
2938 else if (SvNOK(elemsv))
2939 elem = (IV)SvNV(elemsv);
a3b680e6
AL
2940 if (elem > 0) {
2941 static const char oom_array_extend[] =
2942 "Out of memory during array extend"; /* Duplicated in av.c */
2b573ace 2943 MEM_WRAP_CHECK_1(elem,SV*,oom_array_extend);
a3b680e6 2944 }
2b573ace 2945#endif
3280af22 2946 if (!svp || *svp == &PL_sv_undef) {
68dc0745
PP
2947 SV* lv;
2948 if (!defer)
cea2e8a9 2949 DIE(aTHX_ PL_no_aelem, elem);
68dc0745
PP
2950 lv = sv_newmortal();
2951 sv_upgrade(lv, SVt_PVLV);
2952 LvTYPE(lv) = 'y';
a0714e2c 2953 sv_magic(lv, NULL, PERL_MAGIC_defelem, NULL, 0);
b37c2d43 2954 LvTARG(lv) = SvREFCNT_inc_simple(av);
68dc0745
PP
2955 LvTARGOFF(lv) = elem;
2956 LvTARGLEN(lv) = 1;
2957 PUSHs(lv);
2958 RETURN;
2959 }
bfc4de9f 2960 if (PL_op->op_private & OPpLVAL_INTRO)
161b7d16 2961 save_aelem(av, elem, svp);
533c011a
NIS
2962 else if (PL_op->op_private & OPpDEREF)
2963 vivify_ref(*svp, PL_op->op_private & OPpDEREF);
a0d0e21e 2964 }
3280af22 2965 sv = (svp ? *svp : &PL_sv_undef);
be6c24e0
GS
2966 if (!lval && SvGMAGICAL(sv)) /* see note in pp_helem() */
2967 sv = sv_mortalcopy(sv);
2968 PUSHs(sv);
a0d0e21e
LW
2969 RETURN;
2970}
2971
02a9e968 2972void
864dbfa3 2973Perl_vivify_ref(pTHX_ SV *sv, U32 to_what)
02a9e968 2974{
7918f24d
NC
2975 PERL_ARGS_ASSERT_VIVIFY_REF;
2976
5b295bef 2977 SvGETMAGIC(sv);
02a9e968
CS
2978 if (!SvOK(sv)) {
2979 if (SvREADONLY(sv))
f1f66076 2980 Perl_croak(aTHX_ "%s", PL_no_modify);
43230e26 2981 prepare_SV_for_RV(sv);
68dc0745 2982 switch (to_what) {
5f05dabc 2983 case OPpDEREF_SV:
561b68a9 2984 SvRV_set(sv, newSV(0));
5f05dabc
PP
2985 break;
2986 case OPpDEREF_AV:
ad64d0ec 2987 SvRV_set(sv, MUTABLE_SV(newAV()));
5f05dabc
PP
2988 break;
2989 case OPpDEREF_HV:
ad64d0ec 2990 SvRV_set(sv, MUTABLE_SV(newHV()));
5f05dabc
PP
2991 break;
2992 }
02a9e968
CS
2993 SvROK_on(sv);
2994 SvSETMAGIC(sv);
2995 }
2996}
2997
a0d0e21e
LW
2998PP(pp_method)
2999{
97aff369 3000 dVAR; dSP;
890ce7af 3001 SV* const sv = TOPs;
f5d5a27c
CS
3002
3003 if (SvROK(sv)) {
890ce7af 3004 SV* const rsv = SvRV(sv);
f5d5a27c
CS
3005 if (SvTYPE(rsv) == SVt_PVCV) {
3006 SETs(rsv);
3007 RETURN;
3008 }
3009 }
3010
4608196e 3011 SETs(method_common(sv, NULL));
f5d5a27c
CS
3012 RETURN;
3013}
3014
3015PP(pp_method_named)
3016{
97aff369 3017 dVAR; dSP;
890ce7af 3018 SV* const sv = cSVOP_sv;
c158a4fd 3019 U32 hash = SvSHARED_HASH(sv);
f5d5a27c
CS
3020
3021 XPUSHs(method_common(sv, &hash));
3022 RETURN;
3023}
3024
3025STATIC SV *
3026S_method_common(pTHX_ SV* meth, U32* hashp)
3027{
97aff369 3028 dVAR;
a0d0e21e
LW
3029 SV* ob;
3030 GV* gv;
56304f61 3031 HV* stash;
f5d5a27c 3032 STRLEN namelen;
6136c704 3033 const char* packname = NULL;
a0714e2c 3034 SV *packsv = NULL;
ac91690f 3035 STRLEN packlen;
46c461b5
AL
3036 const char * const name = SvPV_const(meth, namelen);
3037 SV * const sv = *(PL_stack_base + TOPMARK + 1);
f5d5a27c 3038
7918f24d
NC
3039 PERL_ARGS_ASSERT_METHOD_COMMON;
3040
4f1b7578
SC
3041 if (!sv)
3042 Perl_croak(aTHX_ "Can't call method \"%s\" on an undefined value", name);
3043
5b295bef 3044 SvGETMAGIC(sv);
a0d0e21e 3045 if (SvROK(sv))
ad64d0ec 3046 ob = MUTABLE_SV(SvRV(sv));
a0d0e21e
LW
3047 else {
3048 GV* iogv;
a0d0e21e 3049
af09ea45 3050 /* this isn't a reference */
5c144d81 3051 if(SvOK(sv) && (packname = SvPV_const(sv, packlen))) {
b464bac0 3052 const HE* const he = hv_fetch_ent(PL_stashcache, sv, 0, 0);
081fc587 3053 if (he) {
5e6396ae 3054 stash = INT2PTR(HV*,SvIV(HeVAL(he)));
081fc587
AB
3055 goto fetch;
3056 }
3057 }
3058
a0d0e21e 3059 if (!SvOK(sv) ||
05f5af9a 3060 !(packname) ||
f776e3cd 3061 !(iogv = gv_fetchsv(sv, 0, SVt_PVIO)) ||
ad64d0ec 3062 !(ob=MUTABLE_SV(GvIO(iogv))))
a0d0e21e 3063 {
af09ea45 3064 /* this isn't the name of a filehandle either */
1c846c1f 3065 if (!packname ||
fd400ab9 3066 ((UTF8_IS_START(*packname) && DO_UTF8(sv))
b86a2fa7 3067 ? !isIDFIRST_utf8((U8*)packname)
834a4ddd
LW
3068 : !isIDFIRST(*packname)
3069 ))
3070 {
f5d5a27c
CS
3071 Perl_croak(aTHX_ "Can't call method \"%s\" %s", name,
3072 SvOK(sv) ? "without a package or object reference"
3073 : "on an undefined value");
834a4ddd 3074 }
af09ea45 3075 /* assume it's a package name */
da51bb9b 3076 stash = gv_stashpvn(packname, packlen, 0);
0dae17bd
GS
3077 if (!stash)
3078 packsv = sv;
081fc587 3079 else {
d4c19fe8 3080 SV* const ref = newSViv(PTR2IV(stash));
04fe65b0 3081 (void)hv_store(PL_stashcache, packname, packlen, ref, 0);
7e8961ec 3082 }
ac91690f 3083 goto fetch;
a0d0e21e 3084 }
af09ea45 3085 /* it _is_ a filehandle name -- replace with a reference */
ad64d0ec 3086 *(PL_stack_base + TOPMARK + 1) = sv_2mortal(newRV(MUTABLE_SV(iogv)));
a0d0e21e
LW
3087 }
3088
af09ea45 3089 /* if we got here, ob should be a reference or a glob */
f0d43078 3090 if (!ob || !(SvOBJECT(ob)
6e592b3a
BM
3091 || (SvTYPE(ob) == SVt_PVGV
3092 && isGV_with_GP(ob)
159b6efe 3093 && (ob = MUTABLE_SV(GvIO((const GV *)ob)))
f0d43078
GS
3094 && SvOBJECT(ob))))
3095 {
f5d5a27c 3096 Perl_croak(aTHX_ "Can't call method \"%s\" on unblessed reference",
59e7186f 3097 (SvSCREAM(meth) && strEQ(name,"isa")) ? "DOES" :
f5d5a27c 3098 name);
f0d43078 3099 }
a0d0e21e 3100
56304f61 3101 stash = SvSTASH(ob);
a0d0e21e 3102
ac91690f 3103 fetch:
af09ea45
IK
3104 /* NOTE: stash may be null, hope hv_fetch_ent and
3105 gv_fetchmethod can cope (it seems they can) */
3106
f5d5a27c
CS
3107 /* shortcut for simple names */
3108 if (hashp) {
b464bac0 3109 const HE* const he = hv_fetch_ent(stash, meth, 0, *hashp);
f5d5a27c 3110 if (he) {
159b6efe 3111 gv = MUTABLE_GV(HeVAL(he));
f5d5a27c 3112 if (isGV(gv) && GvCV(gv) &&
e1a479c5 3113 (!GvCVGEN(gv) || GvCVGEN(gv)
dd69841b 3114 == (PL_sub_generation + HvMROMETA(stash)->cache_gen)))
ad64d0ec 3115 return MUTABLE_SV(GvCV(gv));
f5d5a27c
CS
3116 }
3117 }
3118
85fbaab2 3119 gv = gv_fetchmethod_flags(stash ? stash : MUTABLE_HV(packsv), name,
256d1bb2 3120 GV_AUTOLOAD | GV_CROAK);
9b9d0b15 3121
256d1bb2 3122 assert(gv);
9b9d0b15 3123
ad64d0ec 3124 return isGV(gv) ? MUTABLE_SV(GvCV(gv)) : MUTABLE_SV(gv);
a0d0e21e 3125}
241d1a3b
NC
3126
3127/*
3128 * Local variables:
3129 * c-indentation-style: bsd
3130 * c-basic-offset: 4
3131 * indent-tabs-mode: t
3132 * End:
3133 *
37442d52
RGS
3134 * ex: set ts=8 sts=4 sw=4 noet:
3135 */