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[perl5.git] / pp_hot.c
CommitLineData
a0d0e21e
LW
1/* pp_hot.c
2 *
4bb101f2 3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
241d1a3b 4 * 2000, 2001, 2002, 2003, 2004, 2005, by Larry Wall and others
a0d0e21e
LW
5 *
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
8 *
9 */
10
11/*
12 * Then he heard Merry change the note, and up went the Horn-cry of Buckland,
13 * shaking the air.
14 *
15 * Awake! Awake! Fear, Fire, Foes! Awake!
16 * Fire, Foes! Awake!
17 */
18
166f8a29
DM
19/* This file contains 'hot' pp ("push/pop") functions that
20 * execute the opcodes that make up a perl program. A typical pp function
21 * expects to find its arguments on the stack, and usually pushes its
22 * results onto the stack, hence the 'pp' terminology. Each OP structure
23 * contains a pointer to the relevant pp_foo() function.
24 *
25 * By 'hot', we mean common ops whose execution speed is critical.
26 * By gathering them together into a single file, we encourage
27 * CPU cache hits on hot code. Also it could be taken as a warning not to
28 * change any code in this file unless you're sure it won't affect
29 * performance.
30 */
31
a0d0e21e 32#include "EXTERN.h"
864dbfa3 33#define PERL_IN_PP_HOT_C
a0d0e21e
LW
34#include "perl.h"
35
36/* Hot code. */
37
38PP(pp_const)
39{
39644a26 40 dSP;
1d7c1841 41 XPUSHs(cSVOP_sv);
a0d0e21e
LW
42 RETURN;
43}
44
45PP(pp_nextstate)
46{
533c011a 47 PL_curcop = (COP*)PL_op;
a0d0e21e 48 TAINT_NOT; /* Each statement is presumed innocent */
3280af22 49 PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
a0d0e21e
LW
50 FREETMPS;
51 return NORMAL;
52}
53
54PP(pp_gvsv)
55{
39644a26 56 dSP;
924508f0 57 EXTEND(SP,1);
533c011a 58 if (PL_op->op_private & OPpLVAL_INTRO)
1d7c1841 59 PUSHs(save_scalar(cGVOP_gv));
a0d0e21e 60 else
c69033f2 61 PUSHs(GvSVn(cGVOP_gv));
a0d0e21e
LW
62 RETURN;
63}
64
65PP(pp_null)
66{
67 return NORMAL;
68}
69
7399586d
HS
70PP(pp_setstate)
71{
72 PL_curcop = (COP*)PL_op;
73 return NORMAL;
74}
75
a0d0e21e
LW
76PP(pp_pushmark)
77{
3280af22 78 PUSHMARK(PL_stack_sp);
a0d0e21e
LW
79 return NORMAL;
80}
81
82PP(pp_stringify)
83{
39644a26 84 dSP; dTARGET;
6050d10e 85 sv_copypv(TARG,TOPs);
a0d0e21e
LW
86 SETTARG;
87 RETURN;
88}
89
90PP(pp_gv)
91{
39644a26 92 dSP;
1d7c1841 93 XPUSHs((SV*)cGVOP_gv);
a0d0e21e
LW
94 RETURN;
95}
96
97PP(pp_and)
98{
39644a26 99 dSP;
a0d0e21e
LW
100 if (!SvTRUE(TOPs))
101 RETURN;
102 else {
c960fc3b
SP
103 if (PL_op->op_type == OP_AND)
104 --SP;
a0d0e21e
LW
105 RETURNOP(cLOGOP->op_other);
106 }
107}
108
109PP(pp_sassign)
110{
39644a26 111 dSP; dPOPTOPssrl;
748a9306 112
533c011a 113 if (PL_op->op_private & OPpASSIGN_BACKWARDS) {
a0d0e21e
LW
114 SV *temp;
115 temp = left; left = right; right = temp;
116 }
3280af22 117 if (PL_tainting && PL_tainted && !SvTAINTED(left))
a0d0e21e 118 TAINT_NOT;
54310121 119 SvSetMagicSV(right, left);
a0d0e21e
LW
120 SETs(right);
121 RETURN;
122}
123
124PP(pp_cond_expr)
125{
39644a26 126 dSP;
a0d0e21e 127 if (SvTRUEx(POPs))
1a67a97c 128 RETURNOP(cLOGOP->op_other);
a0d0e21e 129 else
1a67a97c 130 RETURNOP(cLOGOP->op_next);
a0d0e21e
LW
131}
132
133PP(pp_unstack)
134{
135 I32 oldsave;
136 TAINT_NOT; /* Each statement is presumed innocent */
3280af22 137 PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
a0d0e21e 138 FREETMPS;
3280af22 139 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e
LW
140 LEAVE_SCOPE(oldsave);
141 return NORMAL;
142}
143
a0d0e21e
LW
144PP(pp_concat)
145{
39644a26 146 dSP; dATARGET; tryAMAGICbin(concat,opASSIGN);
748a9306
LW
147 {
148 dPOPTOPssrl;
8d6d96c1
HS
149 bool lbyte;
150 STRLEN rlen;
798bec46
RGS
151 const char *rpv = SvPV_const(right, rlen); /* mg_get(right) happens here */
152 const bool rbyte = !DO_UTF8(right);
a9c4fd4e 153 bool rcopied = FALSE;
8d6d96c1
HS
154
155 if (TARG == right && right != left) {
156 right = sv_2mortal(newSVpvn(rpv, rlen));
349d4f2f 157 rpv = SvPV_const(right, rlen); /* no point setting UTF-8 here */
db79b45b 158 rcopied = TRUE;
8d6d96c1 159 }
7889fe52 160
8d6d96c1 161 if (TARG != left) {
a9c4fd4e 162 STRLEN llen;
5c144d81 163 const char* const lpv = SvPV_const(left, llen); /* mg_get(left) may happen here */
90f5826e 164 lbyte = !DO_UTF8(left);
8d6d96c1
HS
165 sv_setpvn(TARG, lpv, llen);
166 if (!lbyte)
167 SvUTF8_on(TARG);
168 else
169 SvUTF8_off(TARG);
170 }
171 else { /* TARG == left */
a9c4fd4e 172 STRLEN llen;
5b295bef 173 SvGETMAGIC(left); /* or mg_get(left) may happen here */
8d6d96c1 174 if (!SvOK(TARG))
c69006e4 175 sv_setpvn(left, "", 0);
10516c54 176 (void)SvPV_nomg_const(left, llen); /* Needed to set UTF8 flag */
90f5826e
ST
177 lbyte = !DO_UTF8(left);
178 if (IN_BYTES)
179 SvUTF8_off(TARG);
8d6d96c1 180 }
a12c0f56 181
8d6d96c1
HS
182 if (lbyte != rbyte) {
183 if (lbyte)
184 sv_utf8_upgrade_nomg(TARG);
185 else {
db79b45b
JH
186 if (!rcopied)
187 right = sv_2mortal(newSVpvn(rpv, rlen));
8d6d96c1 188 sv_utf8_upgrade_nomg(right);
349d4f2f 189 rpv = SvPV_const(right, rlen);
69b47968 190 }
a0d0e21e 191 }
8d6d96c1 192 sv_catpvn_nomg(TARG, rpv, rlen);
43ebc500 193
a0d0e21e
LW
194 SETTARG;
195 RETURN;
748a9306 196 }
a0d0e21e
LW
197}
198
199PP(pp_padsv)
200{
39644a26 201 dSP; dTARGET;
a0d0e21e 202 XPUSHs(TARG);
533c011a
NIS
203 if (PL_op->op_flags & OPf_MOD) {
204 if (PL_op->op_private & OPpLVAL_INTRO)
dd2155a4 205 SAVECLEARSV(PAD_SVl(PL_op->op_targ));
a62b51b8 206 if (PL_op->op_private & OPpDEREF) {
8ec5e241 207 PUTBACK;
dd2155a4 208 vivify_ref(PAD_SVl(PL_op->op_targ), PL_op->op_private & OPpDEREF);
8ec5e241
NIS
209 SPAGAIN;
210 }
4633a7c4 211 }
a0d0e21e
LW
212 RETURN;
213}
214
215PP(pp_readline)
216{
f5284f61 217 tryAMAGICunTARGET(iter, 0);
3280af22 218 PL_last_in_gv = (GV*)(*PL_stack_sp--);
8efb3254 219 if (SvTYPE(PL_last_in_gv) != SVt_PVGV) {
1c846c1f 220 if (SvROK(PL_last_in_gv) && SvTYPE(SvRV(PL_last_in_gv)) == SVt_PVGV)
f5284f61 221 PL_last_in_gv = (GV*)SvRV(PL_last_in_gv);
8efb3254 222 else {
f5284f61
IZ
223 dSP;
224 XPUSHs((SV*)PL_last_in_gv);
225 PUTBACK;
cea2e8a9 226 pp_rv2gv();
f5284f61 227 PL_last_in_gv = (GV*)(*PL_stack_sp--);
f5284f61
IZ
228 }
229 }
a0d0e21e
LW
230 return do_readline();
231}
232
233PP(pp_eq)
234{
39644a26 235 dSP; tryAMAGICbinSET(eq,0);
4c9fe80f 236#ifndef NV_PRESERVES_UV
0bdaccee 237 if (SvROK(TOPs) && !SvAMAGIC(TOPs) && SvROK(TOPm1s) && !SvAMAGIC(TOPm1s)) {
e61d22ef
NC
238 SP--;
239 SETs(boolSV(SvRV(TOPs) == SvRV(TOPp1s)));
4c9fe80f
AS
240 RETURN;
241 }
242#endif
28e5dec8
JH
243#ifdef PERL_PRESERVE_IVUV
244 SvIV_please(TOPs);
245 if (SvIOK(TOPs)) {
4c9fe80f
AS
246 /* Unless the left argument is integer in range we are going
247 to have to use NV maths. Hence only attempt to coerce the
248 right argument if we know the left is integer. */
28e5dec8
JH
249 SvIV_please(TOPm1s);
250 if (SvIOK(TOPm1s)) {
251 bool auvok = SvUOK(TOPm1s);
252 bool buvok = SvUOK(TOPs);
a12c0f56 253
1605159e
NC
254 if (auvok == buvok) { /* ## IV == IV or UV == UV ## */
255 /* Casting IV to UV before comparison isn't going to matter
256 on 2s complement. On 1s complement or sign&magnitude
257 (if we have any of them) it could to make negative zero
258 differ from normal zero. As I understand it. (Need to
259 check - is negative zero implementation defined behaviour
260 anyway?). NWC */
261 UV buv = SvUVX(POPs);
262 UV auv = SvUVX(TOPs);
28e5dec8 263
28e5dec8
JH
264 SETs(boolSV(auv == buv));
265 RETURN;
266 }
267 { /* ## Mixed IV,UV ## */
1605159e 268 SV *ivp, *uvp;
28e5dec8 269 IV iv;
28e5dec8 270
1605159e 271 /* == is commutative so doesn't matter which is left or right */
28e5dec8 272 if (auvok) {
1605159e
NC
273 /* top of stack (b) is the iv */
274 ivp = *SP;
275 uvp = *--SP;
276 } else {
277 uvp = *SP;
278 ivp = *--SP;
279 }
280 iv = SvIVX(ivp);
281 if (iv < 0) {
282 /* As uv is a UV, it's >0, so it cannot be == */
283 SETs(&PL_sv_no);
284 RETURN;
285 }
28e5dec8 286 /* we know iv is >= 0 */
1605159e 287 SETs(boolSV((UV)iv == SvUVX(uvp)));
28e5dec8
JH
288 RETURN;
289 }
290 }
291 }
292#endif
a0d0e21e
LW
293 {
294 dPOPnv;
54310121 295 SETs(boolSV(TOPn == value));
a0d0e21e
LW
296 RETURN;
297 }
298}
299
300PP(pp_preinc)
301{
39644a26 302 dSP;
f39684df 303 if (SvTYPE(TOPs) >= SVt_PVGV && SvTYPE(TOPs) != SVt_PVLV)
d470f89e 304 DIE(aTHX_ PL_no_modify);
3510b4a1
NC
305 if (!SvREADONLY(TOPs) && SvIOK_notUV(TOPs) && !SvNOK(TOPs) && !SvPOK(TOPs)
306 && SvIVX(TOPs) != IV_MAX)
55497cff 307 {
45977657 308 SvIV_set(TOPs, SvIVX(TOPs) + 1);
55497cff 309 SvFLAGS(TOPs) &= ~(SVp_NOK|SVp_POK);
748a9306 310 }
28e5dec8 311 else /* Do all the PERL_PRESERVE_IVUV conditionals in sv_inc */
748a9306 312 sv_inc(TOPs);
a0d0e21e
LW
313 SvSETMAGIC(TOPs);
314 return NORMAL;
315}
316
317PP(pp_or)
318{
39644a26 319 dSP;
a0d0e21e
LW
320 if (SvTRUE(TOPs))
321 RETURN;
322 else {
c960fc3b
SP
323 if (PL_op->op_type == OP_OR)
324 --SP;
a0d0e21e
LW
325 RETURNOP(cLOGOP->op_other);
326 }
327}
328
25a55bd7 329PP(pp_defined)
c963b151 330{
c963b151 331 dSP;
d9aa96a4 332 register SV* sv = NULL;
25a55bd7
SP
333 bool defined = FALSE;
334 const int op_type = PL_op->op_type;
c963b151 335
c960fc3b 336 if(op_type == OP_DOR || op_type == OP_DORASSIGN) {
25a55bd7
SP
337 sv = TOPs;
338 if (!sv || !SvANY(sv)) {
2bd49cfc
NC
339 if (op_type == OP_DOR)
340 --SP;
25a55bd7
SP
341 RETURNOP(cLOGOP->op_other);
342 }
343 } else if (op_type == OP_DEFINED) {
344 sv = POPs;
345 if (!sv || !SvANY(sv))
346 RETPUSHNO;
d9aa96a4 347 } else
52a5c517 348 DIE(aTHX_ "panic: Invalid op (%s) in pp_defined()", OP_NAME(PL_op));
25a55bd7 349
c963b151
BD
350 switch (SvTYPE(sv)) {
351 case SVt_PVAV:
352 if (AvMAX(sv) >= 0 || SvGMAGICAL(sv) || (SvRMAGICAL(sv) && mg_find(sv, PERL_MAGIC_tied)))
25a55bd7 353 defined = TRUE;
c963b151
BD
354 break;
355 case SVt_PVHV:
356 if (HvARRAY(sv) || SvGMAGICAL(sv) || (SvRMAGICAL(sv) && mg_find(sv, PERL_MAGIC_tied)))
25a55bd7 357 defined = TRUE;
c963b151
BD
358 break;
359 case SVt_PVCV:
360 if (CvROOT(sv) || CvXSUB(sv))
25a55bd7 361 defined = TRUE;
c963b151
BD
362 break;
363 default:
5b295bef 364 SvGETMAGIC(sv);
c963b151 365 if (SvOK(sv))
25a55bd7 366 defined = TRUE;
c963b151
BD
367 }
368
c960fc3b
SP
369 if(op_type == OP_DOR || op_type == OP_DORASSIGN) {
370 if(defined)
371 RETURN;
372 if(op_type == OP_DOR)
373 --SP;
25a55bd7 374 RETURNOP(cLOGOP->op_other);
25a55bd7 375 }
d9aa96a4
SP
376 /* assuming OP_DEFINED */
377 if(defined)
378 RETPUSHYES;
379 RETPUSHNO;
c963b151
BD
380}
381
a0d0e21e
LW
382PP(pp_add)
383{
39644a26 384 dSP; dATARGET; bool useleft; tryAMAGICbin(add,opASSIGN);
28e5dec8
JH
385 useleft = USE_LEFT(TOPm1s);
386#ifdef PERL_PRESERVE_IVUV
387 /* We must see if we can perform the addition with integers if possible,
388 as the integer code detects overflow while the NV code doesn't.
389 If either argument hasn't had a numeric conversion yet attempt to get
390 the IV. It's important to do this now, rather than just assuming that
391 it's not IOK as a PV of "9223372036854775806" may not take well to NV
392 addition, and an SV which is NOK, NV=6.0 ought to be coerced to
393 integer in case the second argument is IV=9223372036854775806
394 We can (now) rely on sv_2iv to do the right thing, only setting the
395 public IOK flag if the value in the NV (or PV) slot is truly integer.
396
397 A side effect is that this also aggressively prefers integer maths over
7dca457a
NC
398 fp maths for integer values.
399
a00b5bd3 400 How to detect overflow?
7dca457a
NC
401
402 C 99 section 6.2.6.1 says
403
404 The range of nonnegative values of a signed integer type is a subrange
405 of the corresponding unsigned integer type, and the representation of
406 the same value in each type is the same. A computation involving
407 unsigned operands can never overflow, because a result that cannot be
408 represented by the resulting unsigned integer type is reduced modulo
409 the number that is one greater than the largest value that can be
410 represented by the resulting type.
411
412 (the 9th paragraph)
413
414 which I read as "unsigned ints wrap."
415
416 signed integer overflow seems to be classed as "exception condition"
417
418 If an exceptional condition occurs during the evaluation of an
419 expression (that is, if the result is not mathematically defined or not
420 in the range of representable values for its type), the behavior is
421 undefined.
422
423 (6.5, the 5th paragraph)
424
425 I had assumed that on 2s complement machines signed arithmetic would
426 wrap, hence coded pp_add and pp_subtract on the assumption that
427 everything perl builds on would be happy. After much wailing and
428 gnashing of teeth it would seem that irix64 knows its ANSI spec well,
429 knows that it doesn't need to, and doesn't. Bah. Anyway, the all-
430 unsigned code below is actually shorter than the old code. :-)
431 */
432
28e5dec8
JH
433 SvIV_please(TOPs);
434 if (SvIOK(TOPs)) {
435 /* Unless the left argument is integer in range we are going to have to
436 use NV maths. Hence only attempt to coerce the right argument if
437 we know the left is integer. */
9c5ffd7c
JH
438 register UV auv = 0;
439 bool auvok = FALSE;
7dca457a
NC
440 bool a_valid = 0;
441
28e5dec8 442 if (!useleft) {
7dca457a
NC
443 auv = 0;
444 a_valid = auvok = 1;
445 /* left operand is undef, treat as zero. + 0 is identity,
446 Could SETi or SETu right now, but space optimise by not adding
447 lots of code to speed up what is probably a rarish case. */
448 } else {
449 /* Left operand is defined, so is it IV? */
450 SvIV_please(TOPm1s);
451 if (SvIOK(TOPm1s)) {
452 if ((auvok = SvUOK(TOPm1s)))
453 auv = SvUVX(TOPm1s);
454 else {
a3b680e6 455 register const IV aiv = SvIVX(TOPm1s);
7dca457a
NC
456 if (aiv >= 0) {
457 auv = aiv;
458 auvok = 1; /* Now acting as a sign flag. */
459 } else { /* 2s complement assumption for IV_MIN */
460 auv = (UV)-aiv;
461 }
462 }
463 a_valid = 1;
28e5dec8
JH
464 }
465 }
7dca457a
NC
466 if (a_valid) {
467 bool result_good = 0;
468 UV result;
469 register UV buv;
28e5dec8 470 bool buvok = SvUOK(TOPs);
a00b5bd3 471
7dca457a
NC
472 if (buvok)
473 buv = SvUVX(TOPs);
474 else {
a3b680e6 475 register const IV biv = SvIVX(TOPs);
7dca457a
NC
476 if (biv >= 0) {
477 buv = biv;
478 buvok = 1;
479 } else
480 buv = (UV)-biv;
481 }
482 /* ?uvok if value is >= 0. basically, flagged as UV if it's +ve,
602f51c4 483 else "IV" now, independent of how it came in.
7dca457a
NC
484 if a, b represents positive, A, B negative, a maps to -A etc
485 a + b => (a + b)
486 A + b => -(a - b)
487 a + B => (a - b)
488 A + B => -(a + b)
489 all UV maths. negate result if A negative.
490 add if signs same, subtract if signs differ. */
491
492 if (auvok ^ buvok) {
493 /* Signs differ. */
494 if (auv >= buv) {
495 result = auv - buv;
496 /* Must get smaller */
497 if (result <= auv)
498 result_good = 1;
499 } else {
500 result = buv - auv;
501 if (result <= buv) {
502 /* result really should be -(auv-buv). as its negation
503 of true value, need to swap our result flag */
504 auvok = !auvok;
505 result_good = 1;
28e5dec8
JH
506 }
507 }
7dca457a
NC
508 } else {
509 /* Signs same */
510 result = auv + buv;
511 if (result >= auv)
512 result_good = 1;
513 }
514 if (result_good) {
515 SP--;
516 if (auvok)
28e5dec8 517 SETu( result );
7dca457a
NC
518 else {
519 /* Negate result */
520 if (result <= (UV)IV_MIN)
521 SETi( -(IV)result );
522 else {
523 /* result valid, but out of range for IV. */
524 SETn( -(NV)result );
28e5dec8
JH
525 }
526 }
7dca457a
NC
527 RETURN;
528 } /* Overflow, drop through to NVs. */
28e5dec8
JH
529 }
530 }
531#endif
a0d0e21e 532 {
28e5dec8
JH
533 dPOPnv;
534 if (!useleft) {
535 /* left operand is undef, treat as zero. + 0.0 is identity. */
536 SETn(value);
537 RETURN;
538 }
539 SETn( value + TOPn );
540 RETURN;
a0d0e21e
LW
541 }
542}
543
544PP(pp_aelemfast)
545{
39644a26 546 dSP;
6a077020
DM
547 AV *av = PL_op->op_flags & OPf_SPECIAL ?
548 (AV*)PAD_SV(PL_op->op_targ) : GvAV(cGVOP_gv);
a3b680e6 549 const U32 lval = PL_op->op_flags & OPf_MOD;
533c011a 550 SV** svp = av_fetch(av, PL_op->op_private, lval);
3280af22 551 SV *sv = (svp ? *svp : &PL_sv_undef);
6ff81951 552 EXTEND(SP, 1);
be6c24e0
GS
553 if (!lval && SvGMAGICAL(sv)) /* see note in pp_helem() */
554 sv = sv_mortalcopy(sv);
555 PUSHs(sv);
a0d0e21e
LW
556 RETURN;
557}
558
559PP(pp_join)
560{
39644a26 561 dSP; dMARK; dTARGET;
a0d0e21e
LW
562 MARK++;
563 do_join(TARG, *MARK, MARK, SP);
564 SP = MARK;
565 SETs(TARG);
566 RETURN;
567}
568
569PP(pp_pushre)
570{
39644a26 571 dSP;
44a8e56a
PP
572#ifdef DEBUGGING
573 /*
574 * We ass_u_me that LvTARGOFF() comes first, and that two STRLENs
575 * will be enough to hold an OP*.
576 */
c4420975 577 SV* const sv = sv_newmortal();
44a8e56a
PP
578 sv_upgrade(sv, SVt_PVLV);
579 LvTYPE(sv) = '/';
533c011a 580 Copy(&PL_op, &LvTARGOFF(sv), 1, OP*);
44a8e56a
PP
581 XPUSHs(sv);
582#else
6b88bc9c 583 XPUSHs((SV*)PL_op);
44a8e56a 584#endif
a0d0e21e
LW
585 RETURN;
586}
587
588/* Oversized hot code. */
589
590PP(pp_print)
591{
27da23d5 592 dVAR; dSP; dMARK; dORIGMARK;
a0d0e21e
LW
593 GV *gv;
594 IO *io;
760ac839 595 register PerlIO *fp;
236988e4 596 MAGIC *mg;
a0d0e21e 597
533c011a 598 if (PL_op->op_flags & OPf_STACKED)
a0d0e21e
LW
599 gv = (GV*)*++MARK;
600 else
3280af22 601 gv = PL_defoutgv;
5b468f54
AMS
602
603 if (gv && (io = GvIO(gv))
604 && (mg = SvTIED_mg((SV*)io, PERL_MAGIC_tiedscalar)))
605 {
01bb7c6d 606 had_magic:
68dc0745 607 if (MARK == ORIGMARK) {
1c846c1f 608 /* If using default handle then we need to make space to
a60c0954
NIS
609 * pass object as 1st arg, so move other args up ...
610 */
4352c267 611 MEXTEND(SP, 1);
68dc0745
PP
612 ++MARK;
613 Move(MARK, MARK + 1, (SP - MARK) + 1, SV*);
614 ++SP;
615 }
616 PUSHMARK(MARK - 1);
5b468f54 617 *MARK = SvTIED_obj((SV*)io, mg);
68dc0745 618 PUTBACK;
236988e4 619 ENTER;
864dbfa3 620 call_method("PRINT", G_SCALAR);
236988e4
PP
621 LEAVE;
622 SPAGAIN;
68dc0745
PP
623 MARK = ORIGMARK + 1;
624 *MARK = *SP;
625 SP = MARK;
236988e4
PP
626 RETURN;
627 }
a0d0e21e 628 if (!(io = GvIO(gv))) {
5b468f54
AMS
629 if ((GvEGV(gv)) && (io = GvIO(GvEGV(gv)))
630 && (mg = SvTIED_mg((SV*)io, PERL_MAGIC_tiedscalar)))
01bb7c6d 631 goto had_magic;
2dd78f96
JH
632 if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
633 report_evil_fh(gv, io, PL_op->op_type);
93189314 634 SETERRNO(EBADF,RMS_IFI);
a0d0e21e
LW
635 goto just_say_no;
636 }
637 else if (!(fp = IoOFP(io))) {
599cee73 638 if (ckWARN2(WARN_CLOSED, WARN_IO)) {
4c80c0b2
NC
639 if (IoIFP(io))
640 report_evil_fh(gv, io, OP_phoney_INPUT_ONLY);
2dd78f96 641 else if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
bc37a18f 642 report_evil_fh(gv, io, PL_op->op_type);
a0d0e21e 643 }
93189314 644 SETERRNO(EBADF,IoIFP(io)?RMS_FAC:RMS_IFI);
a0d0e21e
LW
645 goto just_say_no;
646 }
647 else {
648 MARK++;
7889fe52 649 if (PL_ofs_sv && SvOK(PL_ofs_sv)) {
a0d0e21e
LW
650 while (MARK <= SP) {
651 if (!do_print(*MARK, fp))
652 break;
653 MARK++;
654 if (MARK <= SP) {
7889fe52 655 if (!do_print(PL_ofs_sv, fp)) { /* $, */
a0d0e21e
LW
656 MARK--;
657 break;
658 }
659 }
660 }
661 }
662 else {
663 while (MARK <= SP) {
664 if (!do_print(*MARK, fp))
665 break;
666 MARK++;
667 }
668 }
669 if (MARK <= SP)
670 goto just_say_no;
671 else {
7889fe52
NIS
672 if (PL_ors_sv && SvOK(PL_ors_sv))
673 if (!do_print(PL_ors_sv, fp)) /* $\ */
a0d0e21e
LW
674 goto just_say_no;
675
676 if (IoFLAGS(io) & IOf_FLUSH)
760ac839 677 if (PerlIO_flush(fp) == EOF)
a0d0e21e
LW
678 goto just_say_no;
679 }
680 }
681 SP = ORIGMARK;
e52fd6f4 682 XPUSHs(&PL_sv_yes);
a0d0e21e
LW
683 RETURN;
684
685 just_say_no:
686 SP = ORIGMARK;
e52fd6f4 687 XPUSHs(&PL_sv_undef);
a0d0e21e
LW
688 RETURN;
689}
690
691PP(pp_rv2av)
692{
39644a26 693 dSP; dTOPss;
a0d0e21e
LW
694 AV *av;
695
696 if (SvROK(sv)) {
697 wasref:
f5284f61
IZ
698 tryAMAGICunDEREF(to_av);
699
a0d0e21e
LW
700 av = (AV*)SvRV(sv);
701 if (SvTYPE(av) != SVt_PVAV)
cea2e8a9 702 DIE(aTHX_ "Not an ARRAY reference");
533c011a 703 if (PL_op->op_flags & OPf_REF) {
f5284f61 704 SETs((SV*)av);
a0d0e21e
LW
705 RETURN;
706 }
78f9721b
SM
707 else if (LVRET) {
708 if (GIMME == G_SCALAR)
709 Perl_croak(aTHX_ "Can't return array to lvalue scalar context");
710 SETs((SV*)av);
711 RETURN;
712 }
82d03984
RGS
713 else if (PL_op->op_flags & OPf_MOD
714 && PL_op->op_private & OPpLVAL_INTRO)
715 Perl_croak(aTHX_ PL_no_localize_ref);
a0d0e21e
LW
716 }
717 else {
718 if (SvTYPE(sv) == SVt_PVAV) {
719 av = (AV*)sv;
533c011a 720 if (PL_op->op_flags & OPf_REF) {
f5284f61 721 SETs((SV*)av);
a0d0e21e
LW
722 RETURN;
723 }
78f9721b
SM
724 else if (LVRET) {
725 if (GIMME == G_SCALAR)
726 Perl_croak(aTHX_ "Can't return array to lvalue"
727 " scalar context");
728 SETs((SV*)av);
729 RETURN;
730 }
a0d0e21e
LW
731 }
732 else {
67955e0c 733 GV *gv;
1c846c1f 734
a0d0e21e
LW
735 if (SvTYPE(sv) != SVt_PVGV) {
736 if (SvGMAGICAL(sv)) {
737 mg_get(sv);
738 if (SvROK(sv))
739 goto wasref;
740 }
741 if (!SvOK(sv)) {
533c011a
NIS
742 if (PL_op->op_flags & OPf_REF ||
743 PL_op->op_private & HINT_STRICT_REFS)
cea2e8a9 744 DIE(aTHX_ PL_no_usym, "an ARRAY");
599cee73 745 if (ckWARN(WARN_UNINITIALIZED))
29489e7c 746 report_uninit(sv);
f5284f61 747 if (GIMME == G_ARRAY) {
c2444246 748 (void)POPs;
4633a7c4 749 RETURN;
f5284f61
IZ
750 }
751 RETSETUNDEF;
a0d0e21e 752 }
35cd451c
GS
753 if ((PL_op->op_flags & OPf_SPECIAL) &&
754 !(PL_op->op_flags & OPf_MOD))
755 {
7a5fd60d 756 gv = (GV*)gv_fetchsv(sv, FALSE, SVt_PVAV);
c9d5ac95 757 if (!gv
7a5fd60d
NC
758 && (!is_gv_magical_sv(sv,0)
759 || !(gv = (GV*)gv_fetchsv(sv, TRUE, SVt_PVAV))))
c9d5ac95 760 {
35cd451c 761 RETSETUNDEF;
c9d5ac95 762 }
35cd451c
GS
763 }
764 else {
765 if (PL_op->op_private & HINT_STRICT_REFS)
7a5fd60d
NC
766 DIE(aTHX_ PL_no_symref_sv, sv, "an ARRAY");
767 gv = (GV*)gv_fetchsv(sv, TRUE, SVt_PVAV);
35cd451c
GS
768 }
769 }
770 else {
67955e0c 771 gv = (GV*)sv;
a0d0e21e 772 }
67955e0c 773 av = GvAVn(gv);
533c011a 774 if (PL_op->op_private & OPpLVAL_INTRO)
67955e0c 775 av = save_ary(gv);
533c011a 776 if (PL_op->op_flags & OPf_REF) {
f5284f61 777 SETs((SV*)av);
a0d0e21e
LW
778 RETURN;
779 }
78f9721b
SM
780 else if (LVRET) {
781 if (GIMME == G_SCALAR)
782 Perl_croak(aTHX_ "Can't return array to lvalue"
783 " scalar context");
784 SETs((SV*)av);
785 RETURN;
786 }
a0d0e21e
LW
787 }
788 }
789
790 if (GIMME == G_ARRAY) {
a3b680e6 791 const I32 maxarg = AvFILL(av) + 1;
c2444246 792 (void)POPs; /* XXXX May be optimized away? */
1c846c1f 793 EXTEND(SP, maxarg);
93965878 794 if (SvRMAGICAL(av)) {
1c846c1f 795 U32 i;
eb160463 796 for (i=0; i < (U32)maxarg; i++) {
0bcc34c2 797 SV ** const svp = av_fetch(av, i, FALSE);
547d1dd8
HS
798 /* See note in pp_helem, and bug id #27839 */
799 SP[i+1] = svp
800 ? SvGMAGICAL(*svp) ? sv_mortalcopy(*svp) : *svp
801 : &PL_sv_undef;
93965878 802 }
1c846c1f 803 }
93965878
NIS
804 else {
805 Copy(AvARRAY(av), SP+1, maxarg, SV*);
806 }
a0d0e21e
LW
807 SP += maxarg;
808 }
c754c3d7 809 else if (GIMME_V == G_SCALAR) {
a0d0e21e 810 dTARGET;
a3b680e6 811 const I32 maxarg = AvFILL(av) + 1;
f5284f61 812 SETi(maxarg);
a0d0e21e
LW
813 }
814 RETURN;
815}
816
817PP(pp_rv2hv)
818{
39644a26 819 dSP; dTOPss;
a0d0e21e 820 HV *hv;
a3b680e6
AL
821 const I32 gimme = GIMME_V;
822 static const char return_hash_to_lvalue_scalar[] = "Can't return hash to lvalue scalar context";
a0d0e21e
LW
823
824 if (SvROK(sv)) {
825 wasref:
f5284f61
IZ
826 tryAMAGICunDEREF(to_hv);
827
a0d0e21e 828 hv = (HV*)SvRV(sv);
6d822dc4 829 if (SvTYPE(hv) != SVt_PVHV)
cea2e8a9 830 DIE(aTHX_ "Not a HASH reference");
533c011a 831 if (PL_op->op_flags & OPf_REF) {
a0d0e21e
LW
832 SETs((SV*)hv);
833 RETURN;
834 }
78f9721b 835 else if (LVRET) {
be85d344 836 if (gimme != G_ARRAY)
a3b680e6 837 Perl_croak(aTHX_ return_hash_to_lvalue_scalar );
78f9721b
SM
838 SETs((SV*)hv);
839 RETURN;
840 }
82d03984
RGS
841 else if (PL_op->op_flags & OPf_MOD
842 && PL_op->op_private & OPpLVAL_INTRO)
843 Perl_croak(aTHX_ PL_no_localize_ref);
a0d0e21e
LW
844 }
845 else {
6d822dc4 846 if (SvTYPE(sv) == SVt_PVHV) {
a0d0e21e 847 hv = (HV*)sv;
533c011a 848 if (PL_op->op_flags & OPf_REF) {
a0d0e21e
LW
849 SETs((SV*)hv);
850 RETURN;
851 }
78f9721b 852 else if (LVRET) {
be85d344 853 if (gimme != G_ARRAY)
a3b680e6 854 Perl_croak(aTHX_ return_hash_to_lvalue_scalar );
78f9721b
SM
855 SETs((SV*)hv);
856 RETURN;
857 }
a0d0e21e
LW
858 }
859 else {
67955e0c 860 GV *gv;
1c846c1f 861
a0d0e21e
LW
862 if (SvTYPE(sv) != SVt_PVGV) {
863 if (SvGMAGICAL(sv)) {
864 mg_get(sv);
865 if (SvROK(sv))
866 goto wasref;
867 }
868 if (!SvOK(sv)) {
533c011a
NIS
869 if (PL_op->op_flags & OPf_REF ||
870 PL_op->op_private & HINT_STRICT_REFS)
cea2e8a9 871 DIE(aTHX_ PL_no_usym, "a HASH");
599cee73 872 if (ckWARN(WARN_UNINITIALIZED))
29489e7c 873 report_uninit(sv);
be85d344 874 if (gimme == G_ARRAY) {
4633a7c4
LW
875 SP--;
876 RETURN;
877 }
a0d0e21e
LW
878 RETSETUNDEF;
879 }
35cd451c
GS
880 if ((PL_op->op_flags & OPf_SPECIAL) &&
881 !(PL_op->op_flags & OPf_MOD))
882 {
7a5fd60d 883 gv = (GV*)gv_fetchsv(sv, FALSE, SVt_PVHV);
c9d5ac95 884 if (!gv
7a5fd60d
NC
885 && (!is_gv_magical_sv(sv,0)
886 || !(gv = (GV*)gv_fetchsv(sv, TRUE, SVt_PVHV))))
c9d5ac95 887 {
35cd451c 888 RETSETUNDEF;
c9d5ac95 889 }
35cd451c
GS
890 }
891 else {
892 if (PL_op->op_private & HINT_STRICT_REFS)
7a5fd60d
NC
893 DIE(aTHX_ PL_no_symref_sv, sv, "a HASH");
894 gv = (GV*)gv_fetchsv(sv, TRUE, SVt_PVHV);
35cd451c
GS
895 }
896 }
897 else {
67955e0c 898 gv = (GV*)sv;
a0d0e21e 899 }
67955e0c 900 hv = GvHVn(gv);
533c011a 901 if (PL_op->op_private & OPpLVAL_INTRO)
67955e0c 902 hv = save_hash(gv);
533c011a 903 if (PL_op->op_flags & OPf_REF) {
a0d0e21e
LW
904 SETs((SV*)hv);
905 RETURN;
906 }
78f9721b 907 else if (LVRET) {
be85d344 908 if (gimme != G_ARRAY)
a3b680e6 909 Perl_croak(aTHX_ return_hash_to_lvalue_scalar );
78f9721b
SM
910 SETs((SV*)hv);
911 RETURN;
912 }
a0d0e21e
LW
913 }
914 }
915
be85d344 916 if (gimme == G_ARRAY) { /* array wanted */
3280af22 917 *PL_stack_sp = (SV*)hv;
cea2e8a9 918 return do_kv();
a0d0e21e 919 }
be85d344 920 else if (gimme == G_SCALAR) {
a0d0e21e 921 dTARGET;
243d6ab3 922 TARG = Perl_hv_scalar(aTHX_ hv);
a0d0e21e 923 SETTARG;
a0d0e21e 924 }
be85d344 925 RETURN;
a0d0e21e
LW
926}
927
10c8fecd
GS
928STATIC void
929S_do_oddball(pTHX_ HV *hash, SV **relem, SV **firstrelem)
930{
931 if (*relem) {
932 SV *tmpstr;
b464bac0 933 const HE *didstore;
6d822dc4
MS
934
935 if (ckWARN(WARN_MISC)) {
a3b680e6 936 const char *err;
10c8fecd
GS
937 if (relem == firstrelem &&
938 SvROK(*relem) &&
939 (SvTYPE(SvRV(*relem)) == SVt_PVAV ||
940 SvTYPE(SvRV(*relem)) == SVt_PVHV))
941 {
a3b680e6 942 err = "Reference found where even-sized list expected";
10c8fecd
GS
943 }
944 else
a3b680e6
AL
945 err = "Odd number of elements in hash assignment";
946 Perl_warner(aTHX_ packWARN(WARN_MISC), err);
10c8fecd 947 }
6d822dc4
MS
948
949 tmpstr = NEWSV(29,0);
950 didstore = hv_store_ent(hash,*relem,tmpstr,0);
951 if (SvMAGICAL(hash)) {
952 if (SvSMAGICAL(tmpstr))
953 mg_set(tmpstr);
954 if (!didstore)
955 sv_2mortal(tmpstr);
956 }
957 TAINT_NOT;
10c8fecd
GS
958 }
959}
960
a0d0e21e
LW
961PP(pp_aassign)
962{
27da23d5 963 dVAR; dSP;
3280af22
NIS
964 SV **lastlelem = PL_stack_sp;
965 SV **lastrelem = PL_stack_base + POPMARK;
966 SV **firstrelem = PL_stack_base + POPMARK + 1;
a0d0e21e
LW
967 SV **firstlelem = lastrelem + 1;
968
969 register SV **relem;
970 register SV **lelem;
971
972 register SV *sv;
973 register AV *ary;
974
54310121 975 I32 gimme;
a0d0e21e
LW
976 HV *hash;
977 I32 i;
978 int magic;
ca65944e 979 int duplicates = 0;
5637b936
NC
980 SV **firsthashrelem = 0; /* "= 0" keeps gcc 2.95 quiet */
981
a0d0e21e 982
3280af22 983 PL_delaymagic = DM_DELAY; /* catch simultaneous items */
ca65944e 984 gimme = GIMME_V;
a0d0e21e
LW
985
986 /* If there's a common identifier on both sides we have to take
987 * special care that assigning the identifier on the left doesn't
988 * clobber a value on the right that's used later in the list.
989 */
10c8fecd 990 if (PL_op->op_private & (OPpASSIGN_COMMON)) {
cc5e57d2 991 EXTEND_MORTAL(lastrelem - firstrelem + 1);
10c8fecd 992 for (relem = firstrelem; relem <= lastrelem; relem++) {
155aba94 993 if ((sv = *relem)) {
a1f49e72 994 TAINT_NOT; /* Each item is independent */
10c8fecd 995 *relem = sv_mortalcopy(sv);
a1f49e72 996 }
10c8fecd 997 }
a0d0e21e
LW
998 }
999
1000 relem = firstrelem;
1001 lelem = firstlelem;
1002 ary = Null(AV*);
1003 hash = Null(HV*);
10c8fecd 1004
a0d0e21e 1005 while (lelem <= lastlelem) {
bbce6d69 1006 TAINT_NOT; /* Each item stands on its own, taintwise. */
a0d0e21e
LW
1007 sv = *lelem++;
1008 switch (SvTYPE(sv)) {
1009 case SVt_PVAV:
1010 ary = (AV*)sv;
748a9306 1011 magic = SvMAGICAL(ary) != 0;
a0d0e21e 1012 av_clear(ary);
7e42bd57 1013 av_extend(ary, lastrelem - relem);
a0d0e21e
LW
1014 i = 0;
1015 while (relem <= lastrelem) { /* gobble up all the rest */
5117ca91 1016 SV **didstore;
a0d0e21e 1017 assert(*relem);
f2b990bf 1018 sv = newSVsv(*relem);
a0d0e21e 1019 *(relem++) = sv;
5117ca91
GS
1020 didstore = av_store(ary,i++,sv);
1021 if (magic) {
fb73857a
PP
1022 if (SvSMAGICAL(sv))
1023 mg_set(sv);
5117ca91 1024 if (!didstore)
8127e0e3 1025 sv_2mortal(sv);
5117ca91 1026 }
bbce6d69 1027 TAINT_NOT;
a0d0e21e
LW
1028 }
1029 break;
10c8fecd 1030 case SVt_PVHV: { /* normal hash */
a0d0e21e
LW
1031 SV *tmpstr;
1032
1033 hash = (HV*)sv;
748a9306 1034 magic = SvMAGICAL(hash) != 0;
a0d0e21e 1035 hv_clear(hash);
ca65944e 1036 firsthashrelem = relem;
a0d0e21e
LW
1037
1038 while (relem < lastrelem) { /* gobble up all the rest */
5117ca91 1039 HE *didstore;
4633a7c4 1040 if (*relem)
a0d0e21e 1041 sv = *(relem++);
4633a7c4 1042 else
3280af22 1043 sv = &PL_sv_no, relem++;
a0d0e21e
LW
1044 tmpstr = NEWSV(29,0);
1045 if (*relem)
1046 sv_setsv(tmpstr,*relem); /* value */
1047 *(relem++) = tmpstr;
ca65944e
RGS
1048 if (gimme != G_VOID && hv_exists_ent(hash, sv, 0))
1049 /* key overwrites an existing entry */
1050 duplicates += 2;
5117ca91
GS
1051 didstore = hv_store_ent(hash,sv,tmpstr,0);
1052 if (magic) {
fb73857a
PP
1053 if (SvSMAGICAL(tmpstr))
1054 mg_set(tmpstr);
5117ca91 1055 if (!didstore)
8127e0e3 1056 sv_2mortal(tmpstr);
5117ca91 1057 }
bbce6d69 1058 TAINT_NOT;
8e07c86e 1059 }
6a0deba8 1060 if (relem == lastrelem) {
10c8fecd 1061 do_oddball(hash, relem, firstrelem);
6a0deba8 1062 relem++;
1930e939 1063 }
a0d0e21e
LW
1064 }
1065 break;
1066 default:
6fc92669
GS
1067 if (SvIMMORTAL(sv)) {
1068 if (relem <= lastrelem)
1069 relem++;
1070 break;
a0d0e21e
LW
1071 }
1072 if (relem <= lastrelem) {
1073 sv_setsv(sv, *relem);
1074 *(relem++) = sv;
1075 }
1076 else
3280af22 1077 sv_setsv(sv, &PL_sv_undef);
a0d0e21e
LW
1078 SvSETMAGIC(sv);
1079 break;
1080 }
1081 }
3280af22
NIS
1082 if (PL_delaymagic & ~DM_DELAY) {
1083 if (PL_delaymagic & DM_UID) {
a0d0e21e 1084#ifdef HAS_SETRESUID
fb934a90
RD
1085 (void)setresuid((PL_delaymagic & DM_RUID) ? PL_uid : (Uid_t)-1,
1086 (PL_delaymagic & DM_EUID) ? PL_euid : (Uid_t)-1,
1087 (Uid_t)-1);
56febc5e
AD
1088#else
1089# ifdef HAS_SETREUID
fb934a90
RD
1090 (void)setreuid((PL_delaymagic & DM_RUID) ? PL_uid : (Uid_t)-1,
1091 (PL_delaymagic & DM_EUID) ? PL_euid : (Uid_t)-1);
56febc5e
AD
1092# else
1093# ifdef HAS_SETRUID
b28d0864
NIS
1094 if ((PL_delaymagic & DM_UID) == DM_RUID) {
1095 (void)setruid(PL_uid);
1096 PL_delaymagic &= ~DM_RUID;
a0d0e21e 1097 }
56febc5e
AD
1098# endif /* HAS_SETRUID */
1099# ifdef HAS_SETEUID
b28d0864 1100 if ((PL_delaymagic & DM_UID) == DM_EUID) {
fb934a90 1101 (void)seteuid(PL_euid);
b28d0864 1102 PL_delaymagic &= ~DM_EUID;
a0d0e21e 1103 }
56febc5e 1104# endif /* HAS_SETEUID */
b28d0864
NIS
1105 if (PL_delaymagic & DM_UID) {
1106 if (PL_uid != PL_euid)
cea2e8a9 1107 DIE(aTHX_ "No setreuid available");
b28d0864 1108 (void)PerlProc_setuid(PL_uid);
a0d0e21e 1109 }
56febc5e
AD
1110# endif /* HAS_SETREUID */
1111#endif /* HAS_SETRESUID */
d8eceb89
JH
1112 PL_uid = PerlProc_getuid();
1113 PL_euid = PerlProc_geteuid();
a0d0e21e 1114 }
3280af22 1115 if (PL_delaymagic & DM_GID) {
a0d0e21e 1116#ifdef HAS_SETRESGID
fb934a90
RD
1117 (void)setresgid((PL_delaymagic & DM_RGID) ? PL_gid : (Gid_t)-1,
1118 (PL_delaymagic & DM_EGID) ? PL_egid : (Gid_t)-1,
1119 (Gid_t)-1);
56febc5e
AD
1120#else
1121# ifdef HAS_SETREGID
fb934a90
RD
1122 (void)setregid((PL_delaymagic & DM_RGID) ? PL_gid : (Gid_t)-1,
1123 (PL_delaymagic & DM_EGID) ? PL_egid : (Gid_t)-1);
56febc5e
AD
1124# else
1125# ifdef HAS_SETRGID
b28d0864
NIS
1126 if ((PL_delaymagic & DM_GID) == DM_RGID) {
1127 (void)setrgid(PL_gid);
1128 PL_delaymagic &= ~DM_RGID;
a0d0e21e 1129 }
56febc5e
AD
1130# endif /* HAS_SETRGID */
1131# ifdef HAS_SETEGID
b28d0864 1132 if ((PL_delaymagic & DM_GID) == DM_EGID) {
fb934a90 1133 (void)setegid(PL_egid);
b28d0864 1134 PL_delaymagic &= ~DM_EGID;
a0d0e21e 1135 }
56febc5e 1136# endif /* HAS_SETEGID */
b28d0864
NIS
1137 if (PL_delaymagic & DM_GID) {
1138 if (PL_gid != PL_egid)
cea2e8a9 1139 DIE(aTHX_ "No setregid available");
b28d0864 1140 (void)PerlProc_setgid(PL_gid);
a0d0e21e 1141 }
56febc5e
AD
1142# endif /* HAS_SETREGID */
1143#endif /* HAS_SETRESGID */
d8eceb89
JH
1144 PL_gid = PerlProc_getgid();
1145 PL_egid = PerlProc_getegid();
a0d0e21e 1146 }
3280af22 1147 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
a0d0e21e 1148 }
3280af22 1149 PL_delaymagic = 0;
54310121 1150
54310121
PP
1151 if (gimme == G_VOID)
1152 SP = firstrelem - 1;
1153 else if (gimme == G_SCALAR) {
1154 dTARGET;
1155 SP = firstrelem;
ca65944e 1156 SETi(lastrelem - firstrelem + 1 - duplicates);
54310121
PP
1157 }
1158 else {
ca65944e 1159 if (ary)
a0d0e21e 1160 SP = lastrelem;
ca65944e
RGS
1161 else if (hash) {
1162 if (duplicates) {
1163 /* Removes from the stack the entries which ended up as
1164 * duplicated keys in the hash (fix for [perl #24380]) */
1165 Move(firsthashrelem + duplicates,
1166 firsthashrelem, duplicates, SV**);
1167 lastrelem -= duplicates;
1168 }
1169 SP = lastrelem;
1170 }
a0d0e21e
LW
1171 else
1172 SP = firstrelem + (lastlelem - firstlelem);
0c8c7a05 1173 lelem = firstlelem + (relem - firstrelem);
5f05dabc 1174 while (relem <= SP)
3280af22 1175 *relem++ = (lelem <= lastlelem) ? *lelem++ : &PL_sv_undef;
a0d0e21e 1176 }
54310121 1177 RETURN;
a0d0e21e
LW
1178}
1179
8782bef2
GB
1180PP(pp_qr)
1181{
39644a26 1182 dSP;
c4420975
AL
1183 register PMOP * const pm = cPMOP;
1184 SV * const rv = sv_newmortal();
1185 SV * const sv = newSVrv(rv, "Regexp");
e08e52cf
AMS
1186 if (pm->op_pmdynflags & PMdf_TAINTED)
1187 SvTAINTED_on(rv);
aaa362c4 1188 sv_magic(sv,(SV*)ReREFCNT_inc(PM_GETRE(pm)), PERL_MAGIC_qr,0,0);
8782bef2
GB
1189 RETURNX(PUSHs(rv));
1190}
1191
a0d0e21e
LW
1192PP(pp_match)
1193{
39644a26 1194 dSP; dTARG;
a0d0e21e 1195 register PMOP *pm = cPMOP;
d65afb4b 1196 PMOP *dynpm = pm;
0d46e09a
SP
1197 register const char *t;
1198 register const char *s;
5c144d81 1199 const char *strend;
a0d0e21e 1200 I32 global;
f722798b 1201 I32 r_flags = REXEC_CHECKED;
5c144d81 1202 const char *truebase; /* Start of string */
aaa362c4 1203 register REGEXP *rx = PM_GETRE(pm);
b3eb6a9b 1204 bool rxtainted;
a3b680e6 1205 const I32 gimme = GIMME;
a0d0e21e 1206 STRLEN len;
748a9306 1207 I32 minmatch = 0;
a3b680e6 1208 const I32 oldsave = PL_savestack_ix;
f86702cc 1209 I32 update_minmatch = 1;
e60df1fa 1210 I32 had_zerolen = 0;
a0d0e21e 1211
533c011a 1212 if (PL_op->op_flags & OPf_STACKED)
a0d0e21e 1213 TARG = POPs;
59f00321
RGS
1214 else if (PL_op->op_private & OPpTARGET_MY)
1215 GETTARGET;
a0d0e21e 1216 else {
54b9620d 1217 TARG = DEFSV;
a0d0e21e
LW
1218 EXTEND(SP,1);
1219 }
d9f424b2 1220
c277df42 1221 PUTBACK; /* EVAL blocks need stack_sp. */
5c144d81 1222 s = SvPV_const(TARG, len);
a0d0e21e 1223 if (!s)
2269b42e 1224 DIE(aTHX_ "panic: pp_match");
890ce7af 1225 strend = s + len;
b3eb6a9b 1226 rxtainted = ((pm->op_pmdynflags & PMdf_TAINTED) ||
3280af22 1227 (PL_tainted && (pm->op_pmflags & PMf_RETAINT)));
9212bbba 1228 TAINT_NOT;
a0d0e21e 1229
a30b2f1f 1230 RX_MATCH_UTF8_set(rx, DO_UTF8(TARG));
d9f424b2 1231
d65afb4b 1232 /* PMdf_USED is set after a ?? matches once */
48c036b1 1233 if (pm->op_pmdynflags & PMdf_USED) {
c277df42 1234 failure:
a0d0e21e
LW
1235 if (gimme == G_ARRAY)
1236 RETURN;
1237 RETPUSHNO;
1238 }
1239
d65afb4b 1240 /* empty pattern special-cased to use last successful pattern if possible */
3280af22
NIS
1241 if (!rx->prelen && PL_curpm) {
1242 pm = PL_curpm;
aaa362c4 1243 rx = PM_GETRE(pm);
a0d0e21e 1244 }
d65afb4b 1245
eb160463 1246 if (rx->minlen > (I32)len)
d65afb4b 1247 goto failure;
c277df42 1248
a0d0e21e 1249 truebase = t = s;
ad94a511
IZ
1250
1251 /* XXXX What part of this is needed with true \G-support? */
d65afb4b 1252 if ((global = dynpm->op_pmflags & PMf_GLOBAL)) {
cf93c79d 1253 rx->startp[0] = -1;
a0d0e21e 1254 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
14befaf4 1255 MAGIC* mg = mg_find(TARG, PERL_MAGIC_regex_global);
565764a8 1256 if (mg && mg->mg_len >= 0) {
b7a35066 1257 if (!(rx->reganch & ROPT_GPOS_SEEN))
1c846c1f 1258 rx->endp[0] = rx->startp[0] = mg->mg_len;
0ef3e39e
HS
1259 else if (rx->reganch & ROPT_ANCH_GPOS) {
1260 r_flags |= REXEC_IGNOREPOS;
1c846c1f 1261 rx->endp[0] = rx->startp[0] = mg->mg_len;
0ef3e39e 1262 }
748a9306 1263 minmatch = (mg->mg_flags & MGf_MINMATCH);
f86702cc 1264 update_minmatch = 0;
748a9306 1265 }
a0d0e21e
LW
1266 }
1267 }
14977893
JH
1268 if ((!global && rx->nparens)
1269 || SvTEMP(TARG) || PL_sawampersand)
1270 r_flags |= REXEC_COPY_STR;
1c846c1f 1271 if (SvSCREAM(TARG))
22e551b9
IZ
1272 r_flags |= REXEC_SCREAM;
1273
a0d0e21e 1274play_it_again:
cf93c79d
IZ
1275 if (global && rx->startp[0] != -1) {
1276 t = s = rx->endp[0] + truebase;
d9f97599 1277 if ((s + rx->minlen) > strend)
a0d0e21e 1278 goto nope;
f86702cc 1279 if (update_minmatch++)
e60df1fa 1280 minmatch = had_zerolen;
a0d0e21e 1281 }
60aeb6fd
NIS
1282 if (rx->reganch & RE_USE_INTUIT &&
1283 DO_UTF8(TARG) == ((rx->reganch & ROPT_UTF8) != 0)) {
5c144d81
NC
1284 /* FIXME - can PL_bostr be made const char *? */
1285 PL_bostr = (char *)truebase;
1286 s = CALLREG_INTUIT_START(aTHX_ rx, TARG, (char *)s, (char *)strend, r_flags, NULL);
f722798b
IZ
1287
1288 if (!s)
1289 goto nope;
1290 if ( (rx->reganch & ROPT_CHECK_ALL)
14977893 1291 && !PL_sawampersand
f722798b
IZ
1292 && ((rx->reganch & ROPT_NOSCAN)
1293 || !((rx->reganch & RE_INTUIT_TAIL)
05b4157f
GS
1294 && (r_flags & REXEC_SCREAM)))
1295 && !SvROK(TARG)) /* Cannot trust since INTUIT cannot guess ^ */
f722798b 1296 goto yup;
a0d0e21e 1297 }
5c144d81 1298 if (CALLREGEXEC(aTHX_ rx, (char*)s, (char *)strend, (char*)truebase, minmatch, TARG, NULL, r_flags))
bbce6d69 1299 {
3280af22 1300 PL_curpm = pm;
d65afb4b
HS
1301 if (dynpm->op_pmflags & PMf_ONCE)
1302 dynpm->op_pmdynflags |= PMdf_USED;
a0d0e21e
LW
1303 goto gotcha;
1304 }
1305 else
1306 goto ret_no;
1307 /*NOTREACHED*/
1308
1309 gotcha:
72311751
GS
1310 if (rxtainted)
1311 RX_MATCH_TAINTED_on(rx);
1312 TAINT_IF(RX_MATCH_TAINTED(rx));
a0d0e21e 1313 if (gimme == G_ARRAY) {
a3b680e6
AL
1314 const I32 nparens = rx->nparens;
1315 I32 i = (global && !nparens) ? 1 : 0;
a0d0e21e 1316
c277df42 1317 SPAGAIN; /* EVAL blocks could move the stack. */
ffc61ed2
JH
1318 EXTEND(SP, nparens + i);
1319 EXTEND_MORTAL(nparens + i);
1320 for (i = !i; i <= nparens; i++) {
a0d0e21e 1321 PUSHs(sv_newmortal());
cf93c79d 1322 if ((rx->startp[i] != -1) && rx->endp[i] != -1 ) {
b464bac0 1323 const I32 len = rx->endp[i] - rx->startp[i];
289555fe 1324 s = rx->startp[i] + truebase;
290deeac
A
1325 if (rx->endp[i] < 0 || rx->startp[i] < 0 ||
1326 len < 0 || len > strend - s)
1327 DIE(aTHX_ "panic: pp_match start/end pointers");
a0d0e21e 1328 sv_setpvn(*SP, s, len);
cce850e4 1329 if (DO_UTF8(TARG) && is_utf8_string((U8*)s, len))
a197cbdd 1330 SvUTF8_on(*SP);
a0d0e21e
LW
1331 }
1332 }
1333 if (global) {
d65afb4b 1334 if (dynpm->op_pmflags & PMf_CONTINUE) {
0af80b60
HS
1335 MAGIC* mg = 0;
1336 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG))
1337 mg = mg_find(TARG, PERL_MAGIC_regex_global);
1338 if (!mg) {
1339 sv_magic(TARG, (SV*)0, PERL_MAGIC_regex_global, Nullch, 0);
1340 mg = mg_find(TARG, PERL_MAGIC_regex_global);
1341 }
1342 if (rx->startp[0] != -1) {
1343 mg->mg_len = rx->endp[0];
1344 if (rx->startp[0] == rx->endp[0])
1345 mg->mg_flags |= MGf_MINMATCH;
1346 else
1347 mg->mg_flags &= ~MGf_MINMATCH;
1348 }
1349 }
cf93c79d
IZ
1350 had_zerolen = (rx->startp[0] != -1
1351 && rx->startp[0] == rx->endp[0]);
c277df42 1352 PUTBACK; /* EVAL blocks may use stack */
cf93c79d 1353 r_flags |= REXEC_IGNOREPOS | REXEC_NOT_FIRST;
a0d0e21e
LW
1354 goto play_it_again;
1355 }
ffc61ed2 1356 else if (!nparens)
bde848c5 1357 XPUSHs(&PL_sv_yes);
4633a7c4 1358 LEAVE_SCOPE(oldsave);
a0d0e21e
LW
1359 RETURN;
1360 }
1361 else {
1362 if (global) {
1363 MAGIC* mg = 0;
1364 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG))
14befaf4 1365 mg = mg_find(TARG, PERL_MAGIC_regex_global);
a0d0e21e 1366 if (!mg) {
14befaf4
DM
1367 sv_magic(TARG, (SV*)0, PERL_MAGIC_regex_global, Nullch, 0);
1368 mg = mg_find(TARG, PERL_MAGIC_regex_global);
a0d0e21e 1369 }
cf93c79d
IZ
1370 if (rx->startp[0] != -1) {
1371 mg->mg_len = rx->endp[0];
d9f97599 1372 if (rx->startp[0] == rx->endp[0])
748a9306
LW
1373 mg->mg_flags |= MGf_MINMATCH;
1374 else
1375 mg->mg_flags &= ~MGf_MINMATCH;
1376 }
a0d0e21e 1377 }
4633a7c4 1378 LEAVE_SCOPE(oldsave);
a0d0e21e
LW
1379 RETPUSHYES;
1380 }
1381
f722798b 1382yup: /* Confirmed by INTUIT */
72311751
GS
1383 if (rxtainted)
1384 RX_MATCH_TAINTED_on(rx);
1385 TAINT_IF(RX_MATCH_TAINTED(rx));
3280af22 1386 PL_curpm = pm;
d65afb4b
HS
1387 if (dynpm->op_pmflags & PMf_ONCE)
1388 dynpm->op_pmdynflags |= PMdf_USED;
cf93c79d
IZ
1389 if (RX_MATCH_COPIED(rx))
1390 Safefree(rx->subbeg);
1391 RX_MATCH_COPIED_off(rx);
1392 rx->subbeg = Nullch;
a0d0e21e 1393 if (global) {
5c144d81
NC
1394 /* FIXME - should rx->subbeg be const char *? */
1395 rx->subbeg = (char *) truebase;
cf93c79d 1396 rx->startp[0] = s - truebase;
a30b2f1f 1397 if (RX_MATCH_UTF8(rx)) {
0bcc34c2 1398 char * const t = (char*)utf8_hop((U8*)s, rx->minlen);
60aeb6fd
NIS
1399 rx->endp[0] = t - truebase;
1400 }
1401 else {
1402 rx->endp[0] = s - truebase + rx->minlen;
1403 }
cf93c79d 1404 rx->sublen = strend - truebase;
a0d0e21e 1405 goto gotcha;
1c846c1f 1406 }
14977893
JH
1407 if (PL_sawampersand) {
1408 I32 off;
f8c7b90f 1409#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
1410 if (SvIsCOW(TARG) || (SvFLAGS(TARG) & CAN_COW_MASK) == CAN_COW_FLAGS) {
1411 if (DEBUG_C_TEST) {
1412 PerlIO_printf(Perl_debug_log,
1413 "Copy on write: pp_match $& capture, type %d, truebase=%p, t=%p, difference %d\n",
1414 (int) SvTYPE(TARG), truebase, t,
1415 (int)(t-truebase));
1416 }
1417 rx->saved_copy = sv_setsv_cow(rx->saved_copy, TARG);
555831ce 1418 rx->subbeg = (char *) SvPVX_const(rx->saved_copy) + (t - truebase);
ed252734
NC
1419 assert (SvPOKp(rx->saved_copy));
1420 } else
1421#endif
1422 {
14977893 1423
ed252734 1424 rx->subbeg = savepvn(t, strend - t);
f8c7b90f 1425#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
1426 rx->saved_copy = Nullsv;
1427#endif
1428 }
14977893
JH
1429 rx->sublen = strend - t;
1430 RX_MATCH_COPIED_on(rx);
1431 off = rx->startp[0] = s - t;
1432 rx->endp[0] = off + rx->minlen;
1433 }
1434 else { /* startp/endp are used by @- @+. */
1435 rx->startp[0] = s - truebase;
1436 rx->endp[0] = s - truebase + rx->minlen;
1437 }
2d862feb 1438 rx->nparens = rx->lastparen = rx->lastcloseparen = 0; /* used by @-, @+, and $^N */
4633a7c4 1439 LEAVE_SCOPE(oldsave);
a0d0e21e
LW
1440 RETPUSHYES;
1441
1442nope:
a0d0e21e 1443ret_no:
d65afb4b 1444 if (global && !(dynpm->op_pmflags & PMf_CONTINUE)) {
a0d0e21e 1445 if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
14befaf4 1446 MAGIC* mg = mg_find(TARG, PERL_MAGIC_regex_global);
a0d0e21e 1447 if (mg)
565764a8 1448 mg->mg_len = -1;
a0d0e21e
LW
1449 }
1450 }
4633a7c4 1451 LEAVE_SCOPE(oldsave);
a0d0e21e
LW
1452 if (gimme == G_ARRAY)
1453 RETURN;
1454 RETPUSHNO;
1455}
1456
1457OP *
864dbfa3 1458Perl_do_readline(pTHX)
a0d0e21e 1459{
27da23d5 1460 dVAR; dSP; dTARGETSTACKED;
a0d0e21e
LW
1461 register SV *sv;
1462 STRLEN tmplen = 0;
1463 STRLEN offset;
760ac839 1464 PerlIO *fp;
a3b680e6
AL
1465 register IO * const io = GvIO(PL_last_in_gv);
1466 register const I32 type = PL_op->op_type;
1467 const I32 gimme = GIMME_V;
e79b0511 1468 MAGIC *mg;
a0d0e21e 1469
5b468f54 1470 if (io && (mg = SvTIED_mg((SV*)io, PERL_MAGIC_tiedscalar))) {
e79b0511 1471 PUSHMARK(SP);
5b468f54 1472 XPUSHs(SvTIED_obj((SV*)io, mg));
e79b0511
PP
1473 PUTBACK;
1474 ENTER;
864dbfa3 1475 call_method("READLINE", gimme);
e79b0511
PP
1476 LEAVE;
1477 SPAGAIN;
0b7c7b4f
HS
1478 if (gimme == G_SCALAR) {
1479 SV* result = POPs;
1480 SvSetSV_nosteal(TARG, result);
1481 PUSHTARG;
1482 }
e79b0511
PP
1483 RETURN;
1484 }
a0d0e21e
LW
1485 fp = Nullfp;
1486 if (io) {
1487 fp = IoIFP(io);
1488 if (!fp) {
1489 if (IoFLAGS(io) & IOf_ARGV) {
1490 if (IoFLAGS(io) & IOf_START) {
a0d0e21e 1491 IoLINES(io) = 0;
3280af22 1492 if (av_len(GvAVn(PL_last_in_gv)) < 0) {
1d7c1841 1493 IoFLAGS(io) &= ~IOf_START;
9d116dd7 1494 do_open(PL_last_in_gv,"-",1,FALSE,O_RDONLY,0,Nullfp);
c69033f2 1495 sv_setpvn(GvSVn(PL_last_in_gv), "-", 1);
3280af22 1496 SvSETMAGIC(GvSV(PL_last_in_gv));
a2008d6d
GS
1497 fp = IoIFP(io);
1498 goto have_fp;
a0d0e21e
LW
1499 }
1500 }
3280af22 1501 fp = nextargv(PL_last_in_gv);
a0d0e21e 1502 if (!fp) { /* Note: fp != IoIFP(io) */
3280af22 1503 (void)do_close(PL_last_in_gv, FALSE); /* now it does*/
a0d0e21e
LW
1504 }
1505 }
0d44d22b
NC
1506 else if (type == OP_GLOB)
1507 fp = Perl_start_glob(aTHX_ POPs, io);
a0d0e21e
LW
1508 }
1509 else if (type == OP_GLOB)
1510 SP--;
a00b5bd3 1511 else if (ckWARN(WARN_IO) && IoTYPE(io) == IoTYPE_WRONLY) {
4c80c0b2 1512 report_evil_fh(PL_last_in_gv, io, OP_phoney_OUTPUT_ONLY);
a00b5bd3 1513 }
a0d0e21e
LW
1514 }
1515 if (!fp) {
041457d9
DM
1516 if ((!io || !(IoFLAGS(io) & IOf_START))
1517 && ckWARN2(WARN_GLOB, WARN_CLOSED))
1518 {
3f4520fe 1519 if (type == OP_GLOB)
9014280d 1520 Perl_warner(aTHX_ packWARN(WARN_GLOB),
af8c498a
GS
1521 "glob failed (can't start child: %s)",
1522 Strerror(errno));
69282e91 1523 else
bc37a18f 1524 report_evil_fh(PL_last_in_gv, io, PL_op->op_type);
3f4520fe 1525 }
54310121 1526 if (gimme == G_SCALAR) {
79628082 1527 /* undef TARG, and push that undefined value */
ba92458f
AE
1528 if (type != OP_RCATLINE) {
1529 SV_CHECK_THINKFIRST_COW_DROP(TARG);
0c34ef67 1530 SvOK_off(TARG);
ba92458f 1531 }
a0d0e21e
LW
1532 PUSHTARG;
1533 }
1534 RETURN;
1535 }
a2008d6d 1536 have_fp:
54310121 1537 if (gimme == G_SCALAR) {
a0d0e21e 1538 sv = TARG;
9607fc9c
PP
1539 if (SvROK(sv))
1540 sv_unref(sv);
862a34c6 1541 SvUPGRADE(sv, SVt_PV);
a0d0e21e 1542 tmplen = SvLEN(sv); /* remember if already alloced */
bc44a8a2 1543 if (!tmplen && !SvREADONLY(sv))
a0d0e21e 1544 Sv_Grow(sv, 80); /* try short-buffering it */
2b5e58c4
AMS
1545 offset = 0;
1546 if (type == OP_RCATLINE && SvOK(sv)) {
1547 if (!SvPOK(sv)) {
8b6b16e7 1548 SvPV_force_nolen(sv);
2b5e58c4 1549 }
a0d0e21e 1550 offset = SvCUR(sv);
2b5e58c4 1551 }
a0d0e21e 1552 }
54310121
PP
1553 else {
1554 sv = sv_2mortal(NEWSV(57, 80));
1555 offset = 0;
1556 }
fbad3eb5 1557
3887d568
AP
1558 /* This should not be marked tainted if the fp is marked clean */
1559#define MAYBE_TAINT_LINE(io, sv) \
1560 if (!(IoFLAGS(io) & IOf_UNTAINT)) { \
1561 TAINT; \
1562 SvTAINTED_on(sv); \
1563 }
1564
684bef36 1565/* delay EOF state for a snarfed empty file */
fbad3eb5 1566#define SNARF_EOF(gimme,rs,io,sv) \
684bef36 1567 (gimme != G_SCALAR || SvCUR(sv) \
b9fee9ba 1568 || (IoFLAGS(io) & IOf_NOLINE) || !RsSNARF(rs))
fbad3eb5 1569
a0d0e21e 1570 for (;;) {
09e8efcc 1571 PUTBACK;
fbad3eb5 1572 if (!sv_gets(sv, fp, offset)
2d726892
TF
1573 && (type == OP_GLOB
1574 || SNARF_EOF(gimme, PL_rs, io, sv)
1575 || PerlIO_error(fp)))
fbad3eb5 1576 {
760ac839 1577 PerlIO_clearerr(fp);
a0d0e21e 1578 if (IoFLAGS(io) & IOf_ARGV) {
3280af22 1579 fp = nextargv(PL_last_in_gv);
a0d0e21e
LW
1580 if (fp)
1581 continue;
3280af22 1582 (void)do_close(PL_last_in_gv, FALSE);
a0d0e21e
LW
1583 }
1584 else if (type == OP_GLOB) {
e476b1b5 1585 if (!do_close(PL_last_in_gv, FALSE) && ckWARN(WARN_GLOB)) {
9014280d 1586 Perl_warner(aTHX_ packWARN(WARN_GLOB),
4eb79ab5 1587 "glob failed (child exited with status %d%s)",
894356b3 1588 (int)(STATUS_CURRENT >> 8),
cf494569 1589 (STATUS_CURRENT & 0x80) ? ", core dumped" : "");
4eb79ab5 1590 }
a0d0e21e 1591 }
54310121 1592 if (gimme == G_SCALAR) {
ba92458f
AE
1593 if (type != OP_RCATLINE) {
1594 SV_CHECK_THINKFIRST_COW_DROP(TARG);
0c34ef67 1595 SvOK_off(TARG);
ba92458f 1596 }
09e8efcc 1597 SPAGAIN;
a0d0e21e
LW
1598 PUSHTARG;
1599 }
3887d568 1600 MAYBE_TAINT_LINE(io, sv);
a0d0e21e
LW
1601 RETURN;
1602 }
3887d568 1603 MAYBE_TAINT_LINE(io, sv);
a0d0e21e 1604 IoLINES(io)++;
b9fee9ba 1605 IoFLAGS(io) |= IOf_NOLINE;
71be2cbc 1606 SvSETMAGIC(sv);
09e8efcc 1607 SPAGAIN;
a0d0e21e 1608 XPUSHs(sv);
a0d0e21e
LW
1609 if (type == OP_GLOB) {
1610 char *tmps;
349d4f2f 1611 const char *t1;
a0d0e21e 1612
3280af22 1613 if (SvCUR(sv) > 0 && SvCUR(PL_rs) > 0) {
c07a80fd 1614 tmps = SvEND(sv) - 1;
aa07b2f6 1615 if (*tmps == *SvPVX_const(PL_rs)) {
c07a80fd 1616 *tmps = '\0';
b162af07 1617 SvCUR_set(sv, SvCUR(sv) - 1);
c07a80fd
PP
1618 }
1619 }
349d4f2f
NC
1620 for (t1 = SvPVX_const(sv); *t1; t1++)
1621 if (!isALPHA(*t1) && !isDIGIT(*t1) &&
1622 strchr("$&*(){}[]'\";\\|?<>~`", *t1))
a0d0e21e 1623 break;
349d4f2f 1624 if (*t1 && PerlLIO_lstat(SvPVX_const(sv), &PL_statbuf) < 0) {
a0d0e21e
LW
1625 (void)POPs; /* Unmatched wildcard? Chuck it... */
1626 continue;
1627 }
2d79bf7f 1628 } else if (SvUTF8(sv)) { /* OP_READLINE, OP_RCATLINE */
349d4f2f 1629 const U8 *s = (const U8*)SvPVX_const(sv) + offset;
7fc63493
AL
1630 const STRLEN len = SvCUR(sv) - offset;
1631 const U8 *f;
2d79bf7f 1632
ce44635a 1633 if (ckWARN(WARN_UTF8) &&
3a09494c 1634 !is_utf8_string_loc(s, len, &f))
2d79bf7f
JH
1635 /* Emulate :encoding(utf8) warning in the same case. */
1636 Perl_warner(aTHX_ packWARN(WARN_UTF8),
1637 "utf8 \"\\x%02X\" does not map to Unicode",
1638 f < (U8*)SvEND(sv) ? *f : 0);
a0d0e21e 1639 }
54310121 1640 if (gimme == G_ARRAY) {
a0d0e21e 1641 if (SvLEN(sv) - SvCUR(sv) > 20) {
1da4ca5f 1642 SvPV_shrink_to_cur(sv);
a0d0e21e
LW
1643 }
1644 sv = sv_2mortal(NEWSV(58, 80));
1645 continue;
1646 }
54310121 1647 else if (gimme == G_SCALAR && !tmplen && SvLEN(sv) - SvCUR(sv) > 80) {
a0d0e21e 1648 /* try to reclaim a bit of scalar space (only on 1st alloc) */
d5b5861b
NC
1649 const STRLEN new_len
1650 = SvCUR(sv) < 60 ? 80 : SvCUR(sv)+40; /* allow some slop */
1da4ca5f 1651 SvPV_renew(sv, new_len);
a0d0e21e
LW
1652 }
1653 RETURN;
1654 }
1655}
1656
1657PP(pp_enter)
1658{
27da23d5 1659 dVAR; dSP;
c09156bb 1660 register PERL_CONTEXT *cx;
533c011a 1661 I32 gimme = OP_GIMME(PL_op, -1);
a0d0e21e 1662
54310121
PP
1663 if (gimme == -1) {
1664 if (cxstack_ix >= 0)
1665 gimme = cxstack[cxstack_ix].blk_gimme;
1666 else
1667 gimme = G_SCALAR;
1668 }
a0d0e21e
LW
1669
1670 ENTER;
1671
1672 SAVETMPS;
924508f0 1673 PUSHBLOCK(cx, CXt_BLOCK, SP);
a0d0e21e
LW
1674
1675 RETURN;
1676}
1677
1678PP(pp_helem)
1679{
39644a26 1680 dSP;
760ac839 1681 HE* he;
ae77835f 1682 SV **svp;
a0d0e21e 1683 SV *keysv = POPs;
a0d0e21e 1684 HV *hv = (HV*)POPs;
a3b680e6
AL
1685 const U32 lval = PL_op->op_flags & OPf_MOD || LVRET;
1686 const U32 defer = PL_op->op_private & OPpLVAL_DEFER;
be6c24e0 1687 SV *sv;
c158a4fd 1688 const U32 hash = (SvIsCOW_shared_hash(keysv)) ? SvSHARED_HASH(keysv) : 0;
9c5ffd7c 1689 I32 preeminent = 0;
a0d0e21e 1690
ae77835f 1691 if (SvTYPE(hv) == SVt_PVHV) {
8d1f198f
DM
1692 if (PL_op->op_private & OPpLVAL_INTRO) {
1693 MAGIC *mg;
1694 HV *stash;
1695 /* does the element we're localizing already exist? */
c39e6ab0 1696 preeminent =
8d1f198f
DM
1697 /* can we determine whether it exists? */
1698 ( !SvRMAGICAL(hv)
1699 || mg_find((SV*)hv, PERL_MAGIC_env)
1700 || ( (mg = mg_find((SV*)hv, PERL_MAGIC_tied))
1701 /* Try to preserve the existenceness of a tied hash
1702 * element by using EXISTS and DELETE if possible.
1703 * Fallback to FETCH and STORE otherwise */
1704 && (stash = SvSTASH(SvRV(SvTIED_obj((SV*)hv, mg))))
1705 && gv_fetchmethod_autoload(stash, "EXISTS", TRUE)
1706 && gv_fetchmethod_autoload(stash, "DELETE", TRUE)
1707 )
1708 ) ? hv_exists_ent(hv, keysv, 0) : 1;
c39e6ab0 1709
8d1f198f 1710 }
1c846c1f 1711 he = hv_fetch_ent(hv, keysv, lval && !defer, hash);
97fcbf96 1712 svp = he ? &HeVAL(he) : 0;
ae77835f 1713 }
c750a3ec 1714 else {
a0d0e21e 1715 RETPUSHUNDEF;
c750a3ec 1716 }
a0d0e21e 1717 if (lval) {
3280af22 1718 if (!svp || *svp == &PL_sv_undef) {
68dc0745
PP
1719 SV* lv;
1720 SV* key2;
2d8e6c8d 1721 if (!defer) {
ce5030a2 1722 DIE(aTHX_ PL_no_helem_sv, keysv);
2d8e6c8d 1723 }
68dc0745
PP
1724 lv = sv_newmortal();
1725 sv_upgrade(lv, SVt_PVLV);
1726 LvTYPE(lv) = 'y';
14befaf4 1727 sv_magic(lv, key2 = newSVsv(keysv), PERL_MAGIC_defelem, Nullch, 0);
68dc0745
PP
1728 SvREFCNT_dec(key2); /* sv_magic() increments refcount */
1729 LvTARG(lv) = SvREFCNT_inc(hv);
1730 LvTARGLEN(lv) = 1;
1731 PUSHs(lv);
1732 RETURN;
1733 }
533c011a 1734 if (PL_op->op_private & OPpLVAL_INTRO) {
bfcb3514 1735 if (HvNAME_get(hv) && isGV(*svp))
533c011a 1736 save_gp((GV*)*svp, !(PL_op->op_flags & OPf_SPECIAL));
1f5346dc
SC
1737 else {
1738 if (!preeminent) {
1739 STRLEN keylen;
e62f0680 1740 const char * const key = SvPV_const(keysv, keylen);
57813020 1741 SAVEDELETE(hv, savepvn(key,keylen), keylen);
bfc4de9f 1742 } else
1f5346dc
SC
1743 save_helem(hv, keysv, svp);
1744 }
5f05dabc 1745 }
533c011a
NIS
1746 else if (PL_op->op_private & OPpDEREF)
1747 vivify_ref(*svp, PL_op->op_private & OPpDEREF);
a0d0e21e 1748 }
3280af22 1749 sv = (svp ? *svp : &PL_sv_undef);
be6c24e0
GS
1750 /* This makes C<local $tied{foo} = $tied{foo}> possible.
1751 * Pushing the magical RHS on to the stack is useless, since
1752 * that magic is soon destined to be misled by the local(),
1753 * and thus the later pp_sassign() will fail to mg_get() the
1754 * old value. This should also cure problems with delayed
1755 * mg_get()s. GSAR 98-07-03 */
1756 if (!lval && SvGMAGICAL(sv))
1757 sv = sv_mortalcopy(sv);
1758 PUSHs(sv);
a0d0e21e
LW
1759 RETURN;
1760}
1761
1762PP(pp_leave)
1763{
27da23d5 1764 dVAR; dSP;
c09156bb 1765 register PERL_CONTEXT *cx;
a0d0e21e
LW
1766 SV **newsp;
1767 PMOP *newpm;
1768 I32 gimme;
1769
533c011a 1770 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e 1771 cx = &cxstack[cxstack_ix];
3280af22 1772 cx->blk_oldpm = PL_curpm; /* fake block should preserve $1 et al */
a0d0e21e
LW
1773 }
1774
1775 POPBLOCK(cx,newpm);
1776
533c011a 1777 gimme = OP_GIMME(PL_op, -1);
54310121
PP
1778 if (gimme == -1) {
1779 if (cxstack_ix >= 0)
1780 gimme = cxstack[cxstack_ix].blk_gimme;
1781 else
1782 gimme = G_SCALAR;
1783 }
a0d0e21e 1784
a1f49e72 1785 TAINT_NOT;
54310121
PP
1786 if (gimme == G_VOID)
1787 SP = newsp;
1788 else if (gimme == G_SCALAR) {
a3b680e6 1789 register SV **mark;
54310121 1790 MARK = newsp + 1;
09256e2f 1791 if (MARK <= SP) {
54310121
PP
1792 if (SvFLAGS(TOPs) & (SVs_PADTMP|SVs_TEMP))
1793 *MARK = TOPs;
1794 else
1795 *MARK = sv_mortalcopy(TOPs);
09256e2f 1796 } else {
54310121 1797 MEXTEND(mark,0);
3280af22 1798 *MARK = &PL_sv_undef;
a0d0e21e 1799 }
54310121 1800 SP = MARK;
a0d0e21e 1801 }
54310121 1802 else if (gimme == G_ARRAY) {
a1f49e72 1803 /* in case LEAVE wipes old return values */
a3b680e6 1804 register SV **mark;
a1f49e72
CS
1805 for (mark = newsp + 1; mark <= SP; mark++) {
1806 if (!(SvFLAGS(*mark) & (SVs_PADTMP|SVs_TEMP))) {
a0d0e21e 1807 *mark = sv_mortalcopy(*mark);
a1f49e72
CS
1808 TAINT_NOT; /* Each item is independent */
1809 }
1810 }
a0d0e21e 1811 }
3280af22 1812 PL_curpm = newpm; /* Don't pop $1 et al till now */
a0d0e21e
LW
1813
1814 LEAVE;
1815
1816 RETURN;
1817}
1818
1819PP(pp_iter)
1820{
39644a26 1821 dSP;
c09156bb 1822 register PERL_CONTEXT *cx;
dc09a129 1823 SV *sv, *oldsv;
4633a7c4 1824 AV* av;
1d7c1841 1825 SV **itersvp;
a0d0e21e 1826
924508f0 1827 EXTEND(SP, 1);
a0d0e21e 1828 cx = &cxstack[cxstack_ix];
6b35e009 1829 if (CxTYPE(cx) != CXt_LOOP)
cea2e8a9 1830 DIE(aTHX_ "panic: pp_iter");
a0d0e21e 1831
1d7c1841 1832 itersvp = CxITERVAR(cx);
4633a7c4 1833 av = cx->blk_loop.iterary;
89ea2908
GA
1834 if (SvTYPE(av) != SVt_PVAV) {
1835 /* iterate ($min .. $max) */
1836 if (cx->blk_loop.iterlval) {
1837 /* string increment */
1838 register SV* cur = cx->blk_loop.iterlval;
4fe3f0fa 1839 STRLEN maxlen = 0;
83003860 1840 const char *max = SvOK((SV*)av) ? SvPV_const((SV*)av, maxlen) : "";
89ea2908 1841 if (!SvNIOK(cur) && SvCUR(cur) <= maxlen) {
1d7c1841 1842 if (SvREFCNT(*itersvp) == 1 && !SvMAGICAL(*itersvp)) {
eaa5c2d6 1843 /* safe to reuse old SV */
1d7c1841 1844 sv_setsv(*itersvp, cur);
eaa5c2d6 1845 }
1c846c1f 1846 else
eaa5c2d6
GA
1847 {
1848 /* we need a fresh SV every time so that loop body sees a
1849 * completely new SV for closures/references to work as
1850 * they used to */
dc09a129 1851 oldsv = *itersvp;
1d7c1841 1852 *itersvp = newSVsv(cur);
dc09a129 1853 SvREFCNT_dec(oldsv);
eaa5c2d6 1854 }
aa07b2f6 1855 if (strEQ(SvPVX_const(cur), max))
89ea2908
GA
1856 sv_setiv(cur, 0); /* terminate next time */
1857 else
1858 sv_inc(cur);
1859 RETPUSHYES;
1860 }
1861 RETPUSHNO;
1862 }
1863 /* integer increment */
1864 if (cx->blk_loop.iterix > cx->blk_loop.itermax)
1865 RETPUSHNO;
7f61b687 1866
3db8f154 1867 /* don't risk potential race */
1d7c1841 1868 if (SvREFCNT(*itersvp) == 1 && !SvMAGICAL(*itersvp)) {
eaa5c2d6 1869 /* safe to reuse old SV */
1d7c1841 1870 sv_setiv(*itersvp, cx->blk_loop.iterix++);
eaa5c2d6 1871 }
1c846c1f 1872 else
eaa5c2d6
GA
1873 {
1874 /* we need a fresh SV every time so that loop body sees a
1875 * completely new SV for closures/references to work as they
1876 * used to */
dc09a129 1877 oldsv = *itersvp;
1d7c1841 1878 *itersvp = newSViv(cx->blk_loop.iterix++);
dc09a129 1879 SvREFCNT_dec(oldsv);
eaa5c2d6 1880 }
89ea2908
GA
1881 RETPUSHYES;
1882 }
1883
1884 /* iterate array */
ef3e5ea9
NC
1885 if (PL_op->op_private & OPpITER_REVERSED) {
1886 /* In reverse, use itermax as the min :-) */
c491ecac 1887 if (cx->blk_loop.iterix <= cx->blk_loop.itermax)
ef3e5ea9 1888 RETPUSHNO;
a0d0e21e 1889
ef3e5ea9 1890 if (SvMAGICAL(av) || AvREIFY(av)) {
0bcc34c2
AL
1891 SV ** const svp = av_fetch(av, cx->blk_loop.iterix--, FALSE);
1892 sv = svp ? *svp : Nullsv;
ef3e5ea9
NC
1893 }
1894 else {
1895 sv = AvARRAY(av)[cx->blk_loop.iterix--];
1896 }
d42935ef
JH
1897 }
1898 else {
ef3e5ea9
NC
1899 if (cx->blk_loop.iterix >= (av == PL_curstack ? cx->blk_oldsp :
1900 AvFILL(av)))
1901 RETPUSHNO;
1902
1903 if (SvMAGICAL(av) || AvREIFY(av)) {
0bcc34c2
AL
1904 SV ** const svp = av_fetch(av, ++cx->blk_loop.iterix, FALSE);
1905 sv = svp ? *svp : Nullsv;
ef3e5ea9
NC
1906 }
1907 else {
1908 sv = AvARRAY(av)[++cx->blk_loop.iterix];
1909 }
d42935ef 1910 }
ef3e5ea9 1911
0565a181 1912 if (sv && SvIS_FREED(sv)) {
cccede53 1913 *itersvp = Nullsv;
b6c83531 1914 Perl_croak(aTHX_ "Use of freed value in iteration");
cccede53
DM
1915 }
1916
d42935ef 1917 if (sv)
a0d0e21e 1918 SvTEMP_off(sv);
a0d0e21e 1919 else
3280af22 1920 sv = &PL_sv_undef;
8b530633 1921 if (av != PL_curstack && sv == &PL_sv_undef) {
5f05dabc 1922 SV *lv = cx->blk_loop.iterlval;
71be2cbc
PP
1923 if (lv && SvREFCNT(lv) > 1) {
1924 SvREFCNT_dec(lv);
1925 lv = Nullsv;
1926 }
5f05dabc
PP
1927 if (lv)
1928 SvREFCNT_dec(LvTARG(lv));
1929 else {
68dc0745 1930 lv = cx->blk_loop.iterlval = NEWSV(26, 0);
5f05dabc 1931 sv_upgrade(lv, SVt_PVLV);
5f05dabc 1932 LvTYPE(lv) = 'y';
14befaf4 1933 sv_magic(lv, Nullsv, PERL_MAGIC_defelem, Nullch, 0);
5f05dabc
PP
1934 }
1935 LvTARG(lv) = SvREFCNT_inc(av);
1936 LvTARGOFF(lv) = cx->blk_loop.iterix;
42718184 1937 LvTARGLEN(lv) = (STRLEN)UV_MAX;
5f05dabc
PP
1938 sv = (SV*)lv;
1939 }
a0d0e21e 1940
dc09a129 1941 oldsv = *itersvp;
1d7c1841 1942 *itersvp = SvREFCNT_inc(sv);
dc09a129
DM
1943 SvREFCNT_dec(oldsv);
1944
a0d0e21e
LW
1945 RETPUSHYES;
1946}
1947
1948PP(pp_subst)
1949{
39644a26 1950 dSP; dTARG;
a0d0e21e
LW
1951 register PMOP *pm = cPMOP;
1952 PMOP *rpm = pm;
1953 register SV *dstr;
1954 register char *s;
1955 char *strend;
1956 register char *m;
5c144d81 1957 const char *c;
a0d0e21e
LW
1958 register char *d;
1959 STRLEN clen;
1960 I32 iters = 0;
1961 I32 maxiters;
1962 register I32 i;
1963 bool once;
71be2cbc 1964 bool rxtainted;
a0d0e21e 1965 char *orig;
22e551b9 1966 I32 r_flags;
aaa362c4 1967 register REGEXP *rx = PM_GETRE(pm);
a0d0e21e
LW
1968 STRLEN len;
1969 int force_on_match = 0;
0bcc34c2 1970 const I32 oldsave = PL_savestack_ix;
792b2c16 1971 STRLEN slen;
f272994b 1972 bool doutf8 = FALSE;
f8c7b90f 1973#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
1974 bool is_cow;
1975#endif
db79b45b 1976 SV *nsv = Nullsv;
a0d0e21e 1977
5cd24f17
PP
1978 /* known replacement string? */
1979 dstr = (pm->op_pmflags & PMf_CONST) ? POPs : Nullsv;
533c011a 1980 if (PL_op->op_flags & OPf_STACKED)
a0d0e21e 1981 TARG = POPs;
59f00321
RGS
1982 else if (PL_op->op_private & OPpTARGET_MY)
1983 GETTARGET;
a0d0e21e 1984 else {
54b9620d 1985 TARG = DEFSV;
a0d0e21e 1986 EXTEND(SP,1);
1c846c1f 1987 }
d9f424b2 1988
f8c7b90f 1989#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
1990 /* Awooga. Awooga. "bool" types that are actually char are dangerous,
1991 because they make integers such as 256 "false". */
1992 is_cow = SvIsCOW(TARG) ? TRUE : FALSE;
1993#else
765f542d
NC
1994 if (SvIsCOW(TARG))
1995 sv_force_normal_flags(TARG,0);
ed252734
NC
1996#endif
1997 if (
f8c7b90f 1998#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
1999 !is_cow &&
2000#endif
2001 (SvREADONLY(TARG)
4ce457a6
TP
2002 || ( (SvTYPE(TARG) == SVt_PVGV || SvTYPE(TARG) > SVt_PVLV)
2003 && !(SvTYPE(TARG) == SVt_PVGV && SvFAKE(TARG)))))
d470f89e 2004 DIE(aTHX_ PL_no_modify);
8ec5e241
NIS
2005 PUTBACK;
2006
d5263905 2007 s = SvPV_mutable(TARG, len);
68dc0745 2008 if (!SvPOKp(TARG) || SvTYPE(TARG) == SVt_PVGV)
a0d0e21e 2009 force_on_match = 1;
b3eb6a9b 2010 rxtainted = ((pm->op_pmdynflags & PMdf_TAINTED) ||
3280af22
NIS
2011 (PL_tainted && (pm->op_pmflags & PMf_RETAINT)));
2012 if (PL_tainted)
b3eb6a9b 2013 rxtainted |= 2;
9212bbba 2014 TAINT_NOT;
a12c0f56 2015
a30b2f1f 2016 RX_MATCH_UTF8_set(rx, DO_UTF8(TARG));
d9f424b2 2017
a0d0e21e
LW
2018 force_it:
2019 if (!pm || !s)
2269b42e 2020 DIE(aTHX_ "panic: pp_subst");
a0d0e21e
LW
2021
2022 strend = s + len;
a30b2f1f 2023 slen = RX_MATCH_UTF8(rx) ? utf8_length((U8*)s, (U8*)strend) : len;
792b2c16
JH
2024 maxiters = 2 * slen + 10; /* We can match twice at each
2025 position, once with zero-length,
2026 second time with non-zero. */
a0d0e21e 2027
3280af22
NIS
2028 if (!rx->prelen && PL_curpm) {
2029 pm = PL_curpm;
aaa362c4 2030 rx = PM_GETRE(pm);
a0d0e21e 2031 }
22e551b9 2032 r_flags = (rx->nparens || SvTEMP(TARG) || PL_sawampersand)
ed252734 2033 ? REXEC_COPY_STR : 0;
f722798b 2034 if (SvSCREAM(TARG))
22e551b9 2035 r_flags |= REXEC_SCREAM;
7fba1cd6 2036
a0d0e21e 2037 orig = m = s;
f722798b 2038 if (rx->reganch & RE_USE_INTUIT) {
ee0b7718 2039 PL_bostr = orig;
f722798b
IZ
2040 s = CALLREG_INTUIT_START(aTHX_ rx, TARG, s, strend, r_flags, NULL);
2041
2042 if (!s)
2043 goto nope;
2044 /* How to do it in subst? */
2045/* if ( (rx->reganch & ROPT_CHECK_ALL)
1c846c1f 2046 && !PL_sawampersand
f722798b
IZ
2047 && ((rx->reganch & ROPT_NOSCAN)
2048 || !((rx->reganch & RE_INTUIT_TAIL)
2049 && (r_flags & REXEC_SCREAM))))
2050 goto yup;
2051*/
a0d0e21e 2052 }
71be2cbc
PP
2053
2054 /* only replace once? */
a0d0e21e 2055 once = !(rpm->op_pmflags & PMf_GLOBAL);
71be2cbc
PP
2056
2057 /* known replacement string? */
f272994b 2058 if (dstr) {
8514a05a
JH
2059 /* replacement needing upgrading? */
2060 if (DO_UTF8(TARG) && !doutf8) {
db79b45b 2061 nsv = sv_newmortal();
4a176938 2062 SvSetSV(nsv, dstr);
8514a05a
JH
2063 if (PL_encoding)
2064 sv_recode_to_utf8(nsv, PL_encoding);
2065 else
2066 sv_utf8_upgrade(nsv);
5c144d81 2067 c = SvPV_const(nsv, clen);
4a176938
JH
2068 doutf8 = TRUE;
2069 }
2070 else {
5c144d81 2071 c = SvPV_const(dstr, clen);
4a176938 2072 doutf8 = DO_UTF8(dstr);
8514a05a 2073 }
f272994b
A
2074 }
2075 else {
2076 c = Nullch;
2077 doutf8 = FALSE;
2078 }
2079
71be2cbc 2080 /* can do inplace substitution? */
ed252734 2081 if (c
f8c7b90f 2082#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
2083 && !is_cow
2084#endif
2085 && (I32)clen <= rx->minlen && (once || !(r_flags & REXEC_COPY_STR))
db79b45b
JH
2086 && !(rx->reganch & ROPT_LOOKBEHIND_SEEN)
2087 && (!doutf8 || SvUTF8(TARG))) {
f722798b
IZ
2088 if (!CALLREGEXEC(aTHX_ rx, s, strend, orig, 0, TARG, NULL,
2089 r_flags | REXEC_CHECKED))
2090 {
8ec5e241 2091 SPAGAIN;
3280af22 2092 PUSHs(&PL_sv_no);
71be2cbc
PP
2093 LEAVE_SCOPE(oldsave);
2094 RETURN;
2095 }
f8c7b90f 2096#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
2097 if (SvIsCOW(TARG)) {
2098 assert (!force_on_match);
2099 goto have_a_cow;
2100 }
2101#endif
71be2cbc
PP
2102 if (force_on_match) {
2103 force_on_match = 0;
2104 s = SvPV_force(TARG, len);
2105 goto force_it;
2106 }
71be2cbc 2107 d = s;
3280af22 2108 PL_curpm = pm;
71be2cbc
PP
2109 SvSCREAM_off(TARG); /* disable possible screamer */
2110 if (once) {
48c036b1 2111 rxtainted |= RX_MATCH_TAINTED(rx);
cf93c79d
IZ
2112 m = orig + rx->startp[0];
2113 d = orig + rx->endp[0];
71be2cbc
PP
2114 s = orig;
2115 if (m - s > strend - d) { /* faster to shorten from end */
2116 if (clen) {
2117 Copy(c, m, clen, char);
2118 m += clen;
a0d0e21e 2119 }
71be2cbc
PP
2120 i = strend - d;
2121 if (i > 0) {
2122 Move(d, m, i, char);
2123 m += i;
a0d0e21e 2124 }
71be2cbc
PP
2125 *m = '\0';
2126 SvCUR_set(TARG, m - s);
2127 }
155aba94 2128 else if ((i = m - s)) { /* faster from front */
71be2cbc
PP
2129 d -= clen;
2130 m = d;
2131 sv_chop(TARG, d-i);
2132 s += i;
2133 while (i--)
2134 *--d = *--s;
2135 if (clen)
2136 Copy(c, m, clen, char);
2137 }
2138 else if (clen) {
2139 d -= clen;
2140 sv_chop(TARG, d);
2141 Copy(c, d, clen, char);
2142 }
2143 else {
2144 sv_chop(TARG, d);
2145 }
48c036b1 2146 TAINT_IF(rxtainted & 1);
8ec5e241 2147 SPAGAIN;
3280af22 2148 PUSHs(&PL_sv_yes);
71be2cbc
PP
2149 }
2150 else {
71be2cbc
PP
2151 do {
2152 if (iters++ > maxiters)
cea2e8a9 2153 DIE(aTHX_ "Substitution loop");
d9f97599 2154 rxtainted |= RX_MATCH_TAINTED(rx);
cf93c79d 2155 m = rx->startp[0] + orig;
155aba94 2156 if ((i = m - s)) {
71be2cbc
PP
2157 if (s != d)
2158 Move(s, d, i, char);
2159 d += i;
a0d0e21e 2160 }
71be2cbc
PP
2161 if (clen) {
2162 Copy(c, d, clen, char);
2163 d += clen;
2164 }
cf93c79d 2165 s = rx->endp[0] + orig;
cea2e8a9 2166 } while (CALLREGEXEC(aTHX_ rx, s, strend, orig, s == m,
f722798b
IZ
2167 TARG, NULL,
2168 /* don't match same null twice */
2169 REXEC_NOT_FIRST|REXEC_IGNOREPOS));
71be2cbc
PP
2170 if (s != d) {
2171 i = strend - s;
aa07b2f6 2172 SvCUR_set(TARG, d - SvPVX_const(TARG) + i);
71be2cbc 2173 Move(s, d, i+1, char); /* include the NUL */
a0d0e21e 2174 }
48c036b1 2175 TAINT_IF(rxtainted & 1);
8ec5e241 2176 SPAGAIN;
71be2cbc 2177 PUSHs(sv_2mortal(newSViv((I32)iters)));
a0d0e21e 2178 }
80b498e0 2179 (void)SvPOK_only_UTF8(TARG);
48c036b1 2180 TAINT_IF(rxtainted);
8ec5e241
NIS
2181 if (SvSMAGICAL(TARG)) {
2182 PUTBACK;
2183 mg_set(TARG);
2184 SPAGAIN;
2185 }
9212bbba 2186 SvTAINT(TARG);
aefe6dfc
JH
2187 if (doutf8)
2188 SvUTF8_on(TARG);
71be2cbc
PP
2189 LEAVE_SCOPE(oldsave);
2190 RETURN;
a0d0e21e 2191 }
71be2cbc 2192
f722798b
IZ
2193 if (CALLREGEXEC(aTHX_ rx, s, strend, orig, 0, TARG, NULL,
2194 r_flags | REXEC_CHECKED))
2195 {
a0d0e21e
LW
2196 if (force_on_match) {
2197 force_on_match = 0;
2198 s = SvPV_force(TARG, len);
2199 goto force_it;
2200 }
f8c7b90f 2201#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
2202 have_a_cow:
2203#endif
48c036b1 2204 rxtainted |= RX_MATCH_TAINTED(rx);
f2b990bf 2205 dstr = newSVpvn(m, s-m);
ffc61ed2
JH
2206 if (DO_UTF8(TARG))
2207 SvUTF8_on(dstr);
3280af22 2208 PL_curpm = pm;
a0d0e21e 2209 if (!c) {
c09156bb 2210 register PERL_CONTEXT *cx;
8ec5e241 2211 SPAGAIN;
454f1e26 2212 (void)ReREFCNT_inc(rx);
a0d0e21e
LW
2213 PUSHSUBST(cx);
2214 RETURNOP(cPMOP->op_pmreplroot);
2215 }
cf93c79d 2216 r_flags |= REXEC_IGNOREPOS | REXEC_NOT_FIRST;
a0d0e21e
LW
2217 do {
2218 if (iters++ > maxiters)
cea2e8a9 2219 DIE(aTHX_ "Substitution loop");
d9f97599 2220 rxtainted |= RX_MATCH_TAINTED(rx);
cf93c79d 2221 if (RX_MATCH_COPIED(rx) && rx->subbeg != orig) {
a0d0e21e
LW
2222 m = s;
2223 s = orig;
cf93c79d 2224 orig = rx->subbeg;
a0d0e21e
LW
2225 s = orig + (m - s);
2226 strend = s + (strend - m);
2227 }
cf93c79d 2228 m = rx->startp[0] + orig;
db79b45b
JH
2229 if (doutf8 && !SvUTF8(dstr))
2230 sv_catpvn_utf8_upgrade(dstr, s, m - s, nsv);
2231 else
2232 sv_catpvn(dstr, s, m-s);
cf93c79d 2233 s = rx->endp[0] + orig;
a0d0e21e
LW
2234 if (clen)
2235 sv_catpvn(dstr, c, clen);
2236 if (once)
2237 break;
ffc61ed2
JH
2238 } while (CALLREGEXEC(aTHX_ rx, s, strend, orig, s == m,
2239 TARG, NULL, r_flags));
db79b45b
JH
2240 if (doutf8 && !DO_UTF8(TARG))
2241 sv_catpvn_utf8_upgrade(dstr, s, strend - s, nsv);
89afcb60
A
2242 else
2243 sv_catpvn(dstr, s, strend - s);
748a9306 2244
f8c7b90f 2245#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
2246 /* The match may make the string COW. If so, brilliant, because that's
2247 just saved us one malloc, copy and free - the regexp has donated
2248 the old buffer, and we malloc an entirely new one, rather than the
2249 regexp malloc()ing a buffer and copying our original, only for
2250 us to throw it away here during the substitution. */
2251 if (SvIsCOW(TARG)) {
2252 sv_force_normal_flags(TARG, SV_COW_DROP_PV);
2253 } else
2254#endif
2255 {
8bd4d4c5 2256 SvPV_free(TARG);
ed252734 2257 }
f880fe2f 2258 SvPV_set(TARG, SvPVX(dstr));
748a9306
LW
2259 SvCUR_set(TARG, SvCUR(dstr));
2260 SvLEN_set(TARG, SvLEN(dstr));
f272994b 2261 doutf8 |= DO_UTF8(dstr);
f880fe2f 2262 SvPV_set(dstr, (char*)0);
748a9306
LW
2263 sv_free(dstr);
2264
48c036b1 2265 TAINT_IF(rxtainted & 1);
f878fbec 2266 SPAGAIN;
48c036b1
GS
2267 PUSHs(sv_2mortal(newSViv((I32)iters)));
2268
a0d0e21e 2269 (void)SvPOK_only(TARG);
f272994b 2270 if (doutf8)
60aeb6fd 2271 SvUTF8_on(TARG);
48c036b1 2272 TAINT_IF(rxtainted);
a0d0e21e 2273 SvSETMAGIC(TARG);
9212bbba 2274 SvTAINT(TARG);
4633a7c4 2275 LEAVE_SCOPE(oldsave);
a0d0e21e
LW
2276 RETURN;
2277 }
5cd24f17 2278 goto ret_no;
a0d0e21e
LW
2279
2280nope:
1c846c1f 2281ret_no:
8ec5e241 2282 SPAGAIN;
3280af22 2283 PUSHs(&PL_sv_no);
4633a7c4 2284 LEAVE_SCOPE(oldsave);
a0d0e21e
LW
2285 RETURN;
2286}
2287
2288PP(pp_grepwhile)
2289{
27da23d5 2290 dVAR; dSP;
a0d0e21e
LW
2291
2292 if (SvTRUEx(POPs))
3280af22
NIS
2293 PL_stack_base[PL_markstack_ptr[-1]++] = PL_stack_base[*PL_markstack_ptr];
2294 ++*PL_markstack_ptr;
a0d0e21e
LW
2295 LEAVE; /* exit inner scope */
2296
2297 /* All done yet? */
3280af22 2298 if (PL_stack_base + *PL_markstack_ptr > SP) {
a0d0e21e 2299 I32 items;
c4420975 2300 const I32 gimme = GIMME_V;
a0d0e21e
LW
2301
2302 LEAVE; /* exit outer scope */
2303 (void)POPMARK; /* pop src */
3280af22 2304 items = --*PL_markstack_ptr - PL_markstack_ptr[-1];
a0d0e21e 2305 (void)POPMARK; /* pop dst */
3280af22 2306 SP = PL_stack_base + POPMARK; /* pop original mark */
54310121 2307 if (gimme == G_SCALAR) {
7cc47870 2308 if (PL_op->op_private & OPpGREP_LEX) {
c4420975 2309 SV* const sv = sv_newmortal();
7cc47870
RGS
2310 sv_setiv(sv, items);
2311 PUSHs(sv);
2312 }
2313 else {
2314 dTARGET;
2315 XPUSHi(items);
2316 }
a0d0e21e 2317 }
54310121
PP
2318 else if (gimme == G_ARRAY)
2319 SP += items;
a0d0e21e
LW
2320 RETURN;
2321 }
2322 else {
2323 SV *src;
2324
2325 ENTER; /* enter inner scope */
1d7c1841 2326 SAVEVPTR(PL_curpm);
a0d0e21e 2327
3280af22 2328 src = PL_stack_base[*PL_markstack_ptr];
a0d0e21e 2329 SvTEMP_off(src);
59f00321
RGS
2330 if (PL_op->op_private & OPpGREP_LEX)
2331 PAD_SVl(PL_op->op_targ) = src;
2332 else
2333 DEFSV = src;
a0d0e21e
LW
2334
2335 RETURNOP(cLOGOP->op_other);
2336 }
2337}
2338
2339PP(pp_leavesub)
2340{
27da23d5 2341 dVAR; dSP;
a0d0e21e
LW
2342 SV **mark;
2343 SV **newsp;
2344 PMOP *newpm;
2345 I32 gimme;
c09156bb 2346 register PERL_CONTEXT *cx;
b0d9ce38 2347 SV *sv;
a0d0e21e 2348
9850bf21
RH
2349 if (CxMULTICALL(&cxstack[cxstack_ix]))
2350 return 0;
2351
a0d0e21e 2352 POPBLOCK(cx,newpm);
5dd42e15 2353 cxstack_ix++; /* temporarily protect top context */
1c846c1f 2354
a1f49e72 2355 TAINT_NOT;
a0d0e21e
LW
2356 if (gimme == G_SCALAR) {
2357 MARK = newsp + 1;
a29cdaf0 2358 if (MARK <= SP) {
a8bba7fa 2359 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
a29cdaf0
IZ
2360 if (SvTEMP(TOPs)) {
2361 *MARK = SvREFCNT_inc(TOPs);
2362 FREETMPS;
2363 sv_2mortal(*MARK);
cd06dffe
GS
2364 }
2365 else {
959e3673 2366 sv = SvREFCNT_inc(TOPs); /* FREETMPS could clobber it */
a29cdaf0 2367 FREETMPS;
959e3673
GS
2368 *MARK = sv_mortalcopy(sv);
2369 SvREFCNT_dec(sv);
a29cdaf0 2370 }
cd06dffe
GS
2371 }
2372 else
a29cdaf0 2373 *MARK = SvTEMP(TOPs) ? TOPs : sv_mortalcopy(TOPs);
cd06dffe
GS
2374 }
2375 else {
f86702cc 2376 MEXTEND(MARK, 0);
3280af22 2377 *MARK = &PL_sv_undef;
a0d0e21e
LW
2378 }
2379 SP = MARK;
2380 }
54310121 2381 else if (gimme == G_ARRAY) {
f86702cc 2382 for (MARK = newsp + 1; MARK <= SP; MARK++) {
a1f49e72 2383 if (!SvTEMP(*MARK)) {
f86702cc 2384 *MARK = sv_mortalcopy(*MARK);
a1f49e72
CS
2385 TAINT_NOT; /* Each item is independent */
2386 }
f86702cc 2387 }
a0d0e21e 2388 }
f86702cc 2389 PUTBACK;
1c846c1f 2390
5dd42e15
DM
2391 LEAVE;
2392 cxstack_ix--;
b0d9ce38 2393 POPSUB(cx,sv); /* Stack values are safe: release CV and @_ ... */
3280af22 2394 PL_curpm = newpm; /* ... and pop $1 et al */
a0d0e21e 2395
b0d9ce38 2396 LEAVESUB(sv);
f39bc417 2397 return cx->blk_sub.retop;
a0d0e21e
LW
2398}
2399
cd06dffe
GS
2400/* This duplicates the above code because the above code must not
2401 * get any slower by more conditions */
2402PP(pp_leavesublv)
2403{
27da23d5 2404 dVAR; dSP;
cd06dffe
GS
2405 SV **mark;
2406 SV **newsp;
2407 PMOP *newpm;
2408 I32 gimme;
2409 register PERL_CONTEXT *cx;
b0d9ce38 2410 SV *sv;
cd06dffe 2411
9850bf21
RH
2412 if (CxMULTICALL(&cxstack[cxstack_ix]))
2413 return 0;
2414
cd06dffe 2415 POPBLOCK(cx,newpm);
5dd42e15 2416 cxstack_ix++; /* temporarily protect top context */
1c846c1f 2417
cd06dffe
GS
2418 TAINT_NOT;
2419
2420 if (cx->blk_sub.lval & OPpENTERSUB_INARGS) {
2421 /* We are an argument to a function or grep().
2422 * This kind of lvalueness was legal before lvalue
2423 * subroutines too, so be backward compatible:
2424 * cannot report errors. */
2425
2426 /* Scalar context *is* possible, on the LHS of -> only,
2427 * as in f()->meth(). But this is not an lvalue. */
2428 if (gimme == G_SCALAR)
2429 goto temporise;
2430 if (gimme == G_ARRAY) {
a8bba7fa 2431 if (!CvLVALUE(cx->blk_sub.cv))
cd06dffe
GS
2432 goto temporise_array;
2433 EXTEND_MORTAL(SP - newsp);
2434 for (mark = newsp + 1; mark <= SP; mark++) {
2435 if (SvTEMP(*mark))
2436 /* empty */ ;
2437 else if (SvFLAGS(*mark) & (SVs_PADTMP | SVf_READONLY))
2438 *mark = sv_mortalcopy(*mark);
2439 else {
2440 /* Can be a localized value subject to deletion. */
2441 PL_tmps_stack[++PL_tmps_ix] = *mark;
e1f15930 2442 (void)SvREFCNT_inc(*mark);
cd06dffe
GS
2443 }
2444 }
2445 }
2446 }
2447 else if (cx->blk_sub.lval) { /* Leave it as it is if we can. */
2448 /* Here we go for robustness, not for speed, so we change all
2449 * the refcounts so the caller gets a live guy. Cannot set
2450 * TEMP, so sv_2mortal is out of question. */
a8bba7fa 2451 if (!CvLVALUE(cx->blk_sub.cv)) {
5dd42e15
DM
2452 LEAVE;
2453 cxstack_ix--;
b0d9ce38 2454 POPSUB(cx,sv);
d470f89e 2455 PL_curpm = newpm;
b0d9ce38 2456 LEAVESUB(sv);
d470f89e
GS
2457 DIE(aTHX_ "Can't modify non-lvalue subroutine call");
2458 }
cd06dffe
GS
2459 if (gimme == G_SCALAR) {
2460 MARK = newsp + 1;
2461 EXTEND_MORTAL(1);
2462 if (MARK == SP) {
f9bc45ef
TP
2463 /* Temporaries are bad unless they happen to be elements
2464 * of a tied hash or array */
2465 if (SvFLAGS(TOPs) & (SVs_TEMP | SVs_PADTMP | SVf_READONLY) &&
2466 !(SvRMAGICAL(TOPs) && mg_find(TOPs, PERL_MAGIC_tiedelem))) {
5dd42e15
DM
2467 LEAVE;
2468 cxstack_ix--;
b0d9ce38 2469 POPSUB(cx,sv);
d470f89e 2470 PL_curpm = newpm;
b0d9ce38 2471 LEAVESUB(sv);
e9f19e3c
HS
2472 DIE(aTHX_ "Can't return %s from lvalue subroutine",
2473 SvREADONLY(TOPs) ? (TOPs == &PL_sv_undef) ? "undef"
2474 : "a readonly value" : "a temporary");
d470f89e 2475 }
cd06dffe
GS
2476 else { /* Can be a localized value
2477 * subject to deletion. */
2478 PL_tmps_stack[++PL_tmps_ix] = *mark;
e1f15930 2479 (void)SvREFCNT_inc(*mark);
cd06dffe
GS
2480 }
2481 }
d470f89e 2482 else { /* Should not happen? */
5dd42e15
DM
2483 LEAVE;
2484 cxstack_ix--;
b0d9ce38 2485 POPSUB(cx,sv);
d470f89e 2486 PL_curpm = newpm;
b0d9ce38 2487 LEAVESUB(sv);
d470f89e 2488 DIE(aTHX_ "%s returned from lvalue subroutine in scalar context",
cd06dffe 2489 (MARK > SP ? "Empty array" : "Array"));
d470f89e 2490 }
cd06dffe
GS
2491 SP = MARK;
2492 }
2493 else if (gimme == G_ARRAY) {
2494 EXTEND_MORTAL(SP - newsp);
2495 for (mark = newsp + 1; mark <= SP; mark++) {
f206cdda
AMS
2496 if (*mark != &PL_sv_undef
2497 && SvFLAGS(*mark) & (SVs_TEMP | SVs_PADTMP | SVf_READONLY)) {
d470f89e
GS
2498 /* Might be flattened array after $#array = */
2499 PUTBACK;
5dd42e15
DM
2500 LEAVE;
2501 cxstack_ix--;
b0d9ce38 2502 POPSUB(cx,sv);
d470f89e 2503 PL_curpm = newpm;
b0d9ce38 2504 LEAVESUB(sv);
f206cdda
AMS
2505 DIE(aTHX_ "Can't return a %s from lvalue subroutine",
2506 SvREADONLY(TOPs) ? "readonly value" : "temporary");
d470f89e 2507 }
cd06dffe 2508 else {
cd06dffe
GS
2509 /* Can be a localized value subject to deletion. */
2510 PL_tmps_stack[++PL_tmps_ix] = *mark;
e1f15930 2511 (void)SvREFCNT_inc(*mark);
cd06dffe
GS
2512 }
2513 }
2514 }
2515 }
2516 else {
2517 if (gimme == G_SCALAR) {
2518 temporise:
2519 MARK = newsp + 1;
2520 if (MARK <= SP) {
a8bba7fa 2521 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
cd06dffe
GS
2522 if (SvTEMP(TOPs)) {
2523 *MARK = SvREFCNT_inc(TOPs);
2524 FREETMPS;
2525 sv_2mortal(*MARK);
2526 }
2527 else {
959e3673 2528 sv = SvREFCNT_inc(TOPs); /* FREETMPS could clobber it */
cd06dffe 2529 FREETMPS;
959e3673
GS
2530 *MARK = sv_mortalcopy(sv);
2531 SvREFCNT_dec(sv);
cd06dffe
GS
2532 }
2533 }
2534 else
2535 *MARK = SvTEMP(TOPs) ? TOPs : sv_mortalcopy(TOPs);
2536 }
2537 else {
2538 MEXTEND(MARK, 0);
2539 *MARK = &PL_sv_undef;
2540 }
2541 SP = MARK;
2542 }
2543 else if (gimme == G_ARRAY) {
2544 temporise_array:
2545 for (MARK = newsp + 1; MARK <= SP; MARK++) {
2546 if (!SvTEMP(*MARK)) {
2547 *MARK = sv_mortalcopy(*MARK);
2548 TAINT_NOT; /* Each item is independent */
2549 }
2550 }
2551 }
2552 }
2553 PUTBACK;
1c846c1f 2554
5dd42e15
DM
2555 LEAVE;
2556 cxstack_ix--;
b0d9ce38 2557 POPSUB(cx,sv); /* Stack values are safe: release CV and @_ ... */
cd06dffe
GS
2558 PL_curpm = newpm; /* ... and pop $1 et al */
2559
b0d9ce38 2560 LEAVESUB(sv);
f39bc417 2561 return cx->blk_sub.retop;
cd06dffe
GS
2562}
2563
2564
76e3520e 2565STATIC CV *
cea2e8a9 2566S_get_db_sub(pTHX_ SV **svp, CV *cv)
3de9ffa1 2567{
0bcc34c2 2568 SV * const dbsv = GvSVn(PL_DBsub);
491527d0 2569
f398eb67 2570 save_item(dbsv);
491527d0
GS
2571 if (!PERLDB_SUB_NN) {
2572 GV *gv = CvGV(cv);
2573
491527d0 2574 if ( (CvFLAGS(cv) & (CVf_ANON | CVf_CLONED))
1c846c1f 2575 || strEQ(GvNAME(gv), "END")
491527d0
GS
2576 || ((GvCV(gv) != cv) && /* Could be imported, and old sub redefined. */
2577 !( (SvTYPE(*svp) == SVt_PVGV) && (GvCV((GV*)*svp) == cv)
2578 && (gv = (GV*)*svp) ))) {
2579 /* Use GV from the stack as a fallback. */
2580 /* GV is potentially non-unique, or contain different CV. */
823a54a3 2581 SV * const tmp = newRV((SV*)cv);
c2e66d9e
GS
2582 sv_setsv(dbsv, tmp);
2583 SvREFCNT_dec(tmp);
491527d0
GS
2584 }
2585 else {
2586 gv_efullname3(dbsv, gv, Nullch);
2587 }
3de9ffa1
MB
2588 }
2589 else {
a9c4fd4e 2590 const int type = SvTYPE(dbsv);
f398eb67
NC
2591 if (type < SVt_PVIV && type != SVt_IV)
2592 sv_upgrade(dbsv, SVt_PVIV);
155aba94 2593 (void)SvIOK_on(dbsv);
45977657 2594 SvIV_set(dbsv, PTR2IV(cv)); /* Do it the quickest way */
3de9ffa1 2595 }
491527d0 2596
3de9ffa1 2597 if (CvXSUB(cv))
3280af22
NIS
2598 PL_curcopdb = PL_curcop;
2599 cv = GvCV(PL_DBsub);
3de9ffa1
MB
2600 return cv;
2601}
2602
a0d0e21e
LW
2603PP(pp_entersub)
2604{
27da23d5 2605 dVAR; dSP; dPOPss;
a0d0e21e
LW
2606 GV *gv;
2607 HV *stash;
2608 register CV *cv;
c09156bb 2609 register PERL_CONTEXT *cx;
5d94fbed 2610 I32 gimme;
a9c4fd4e 2611 const bool hasargs = (PL_op->op_flags & OPf_STACKED) != 0;
a0d0e21e
LW
2612
2613 if (!sv)
cea2e8a9 2614 DIE(aTHX_ "Not a CODE reference");
a0d0e21e 2615 switch (SvTYPE(sv)) {
f1025168
NC
2616 /* This is overwhelming the most common case: */
2617 case SVt_PVGV:
2618 if (!(cv = GvCVu((GV*)sv)))
2619 cv = sv_2cv(sv, &stash, &gv, FALSE);
2620 if (!cv) {
2621 ENTER;
2622 SAVETMPS;
2623 goto try_autoload;
2624 }
2625 break;
a0d0e21e
LW
2626 default:
2627 if (!SvROK(sv)) {
a9c4fd4e 2628 const char *sym;
3280af22 2629 if (sv == &PL_sv_yes) { /* unfound import, ignore */
fb73857a 2630 if (hasargs)
3280af22 2631 SP = PL_stack_base + POPMARK;
a0d0e21e 2632 RETURN;
fb73857a 2633 }
15ff848f
CS
2634 if (SvGMAGICAL(sv)) {
2635 mg_get(sv);
f5f1d18e
AMS
2636 if (SvROK(sv))
2637 goto got_rv;
aa07b2f6 2638 sym = SvPOKp(sv) ? SvPVX_const(sv) : Nullch;
15ff848f 2639 }
a9c4fd4e 2640 else {
8b6b16e7 2641 sym = SvPV_nolen_const(sv);
a9c4fd4e 2642 }
15ff848f 2643 if (!sym)
cea2e8a9 2644 DIE(aTHX_ PL_no_usym, "a subroutine");
533c011a 2645 if (PL_op->op_private & HINT_STRICT_REFS)
cea2e8a9 2646 DIE(aTHX_ PL_no_symref, sym, "a subroutine");
864dbfa3 2647 cv = get_cv(sym, TRUE);
a0d0e21e
LW
2648 break;
2649 }
f5f1d18e 2650 got_rv:
f5284f61 2651 {
823a54a3 2652 SV * const * sp = &sv; /* Used in tryAMAGICunDEREF macro. */
f5284f61
IZ
2653 tryAMAGICunDEREF(to_cv);
2654 }
a0d0e21e
LW
2655 cv = (CV*)SvRV(sv);
2656 if (SvTYPE(cv) == SVt_PVCV)
2657 break;
2658 /* FALL THROUGH */
2659 case SVt_PVHV:
2660 case SVt_PVAV:
cea2e8a9 2661 DIE(aTHX_ "Not a CODE reference");
f1025168 2662 /* This is the second most common case: */
a0d0e21e
LW
2663 case SVt_PVCV:
2664 cv = (CV*)sv;
2665 break;
a0d0e21e
LW
2666 }
2667
2668 ENTER;
2669 SAVETMPS;
2670
2671 retry:
a0d0e21e 2672 if (!CvROOT(cv) && !CvXSUB(cv)) {
f1025168 2673 goto fooey;
a0d0e21e
LW
2674 }
2675
54310121 2676 gimme = GIMME_V;
67caa1fe 2677 if ((PL_op->op_private & OPpENTERSUB_DB) && GvCV(PL_DBsub) && !CvNODEBUG(cv)) {
06492da6
SF
2678 if (CvASSERTION(cv) && PL_DBassertion)
2679 sv_setiv(PL_DBassertion, 1);
2680
4f01c5a5 2681 cv = get_db_sub(&sv, cv);
ccafdc96
RGS
2682 if (!cv || (!CvXSUB(cv) && !CvSTART(cv)))
2683 DIE(aTHX_ "No DB::sub routine defined");
67caa1fe 2684 }
a0d0e21e 2685
f1025168
NC
2686 if (!(CvXSUB(cv))) {
2687 /* This path taken at least 75% of the time */
a0d0e21e
LW
2688 dMARK;
2689 register I32 items = SP - MARK;
0bcc34c2 2690 AV* const padlist = CvPADLIST(cv);
a0d0e21e
LW
2691 PUSHBLOCK(cx, CXt_SUB, MARK);
2692 PUSHSUB(cx);
f39bc417 2693 cx->blk_sub.retop = PL_op->op_next;
a0d0e21e 2694 CvDEPTH(cv)++;
6b35e009
GS
2695 /* XXX This would be a natural place to set C<PL_compcv = cv> so
2696 * that eval'' ops within this sub know the correct lexical space.
a3985cdc
DM
2697 * Owing the speed considerations, we choose instead to search for
2698 * the cv using find_runcv() when calling doeval().
6b35e009 2699 */
b36bdeca 2700 if (CvDEPTH(cv) >= 2) {
1d7c1841 2701 PERL_STACK_OVERFLOW_CHECK();
26019298 2702 pad_push(padlist, CvDEPTH(cv));
a0d0e21e 2703 }
9320a037
DM
2704 SAVECOMPPAD();
2705 PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv));
6d4ff0d2 2706 if (hasargs)
6d4ff0d2 2707 {
0bcc34c2 2708 AV* const av = (AV*)PAD_SVl(0);
221373f0
GS
2709 if (AvREAL(av)) {
2710 /* @_ is normally not REAL--this should only ever
2711 * happen when DB::sub() calls things that modify @_ */
2712 av_clear(av);
2713 AvREAL_off(av);
2714 AvREIFY_on(av);
2715 }
3280af22
NIS
2716 cx->blk_sub.savearray = GvAV(PL_defgv);
2717 GvAV(PL_defgv) = (AV*)SvREFCNT_inc(av);
dd2155a4 2718 CX_CURPAD_SAVE(cx->blk_sub);
6d4ff0d2 2719 cx->blk_sub.argarray = av;
a0d0e21e
LW
2720 ++MARK;
2721
2722 if (items > AvMAX(av) + 1) {
504618e9 2723 SV **ary = AvALLOC(av);
a0d0e21e
LW
2724 if (AvARRAY(av) != ary) {
2725 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
f880fe2f 2726 SvPV_set(av, (char*)ary);
a0d0e21e
LW
2727 }
2728 if (items > AvMAX(av) + 1) {
2729 AvMAX(av) = items - 1;
2730 Renew(ary,items,SV*);
2731 AvALLOC(av) = ary;
f880fe2f 2732 SvPV_set(av, (char*)ary);
a0d0e21e
LW
2733 }
2734 }
2735 Copy(MARK,AvARRAY(av),items,SV*);
93965878 2736 AvFILLp(av) = items - 1;
1c846c1f 2737
a0d0e21e
LW
2738 while (items--) {
2739 if (*MARK)
2740 SvTEMP_off(*MARK);
2741 MARK++;
2742 }
2743 }
4a925ff6
GS
2744 /* warning must come *after* we fully set up the context
2745 * stuff so that __WARN__ handlers can safely dounwind()
2746 * if they want to
2747 */
2748 if (CvDEPTH(cv) == 100 && ckWARN(WARN_RECURSION)
2749 && !(PERLDB_SUB && cv == GvCV(PL_DBsub)))
2750 sub_crush_depth(cv);
77a005ab 2751#if 0
bf49b057 2752 DEBUG_S(PerlIO_printf(Perl_debug_log,
0f15f207 2753 "%p entersub returning %p\n", thr, CvSTART(cv)));
77a005ab 2754#endif
a0d0e21e
LW
2755 RETURNOP(CvSTART(cv));
2756 }
f1025168
NC
2757 else {
2758#ifdef PERL_XSUB_OLDSTYLE
2759 if (CvOLDSTYLE(cv)) {
2760 I32 (*fp3)(int,int,int);
2761 dMARK;
2762 register I32 items = SP - MARK;
2763 /* We dont worry to copy from @_. */
2764 while (SP > mark) {
2765 SP[1] = SP[0];
2766 SP--;
2767 }
2768 PL_stack_sp = mark + 1;
2769 fp3 = (I32(*)(int,int,int))CvXSUB(cv);
2770 items = (*fp3)(CvXSUBANY(cv).any_i32,
2771 MARK - PL_stack_base + 1,
2772 items);
2773 PL_stack_sp = PL_stack_base + items;
2774 }
2775 else
2776#endif /* PERL_XSUB_OLDSTYLE */
2777 {
2778 I32 markix = TOPMARK;
2779
2780 PUTBACK;
2781
2782 if (!hasargs) {
2783 /* Need to copy @_ to stack. Alternative may be to
2784 * switch stack to @_, and copy return values
2785 * back. This would allow popping @_ in XSUB, e.g.. XXXX */
a3b680e6
AL
2786 AV * const av = GvAV(PL_defgv);
2787 const I32 items = AvFILLp(av) + 1; /* @_ is not tieable */
f1025168
NC
2788
2789 if (items) {
2790 /* Mark is at the end of the stack. */
2791 EXTEND(SP, items);
2792 Copy(AvARRAY(av), SP + 1, items, SV*);
2793 SP += items;
2794 PUTBACK ;
2795 }
2796 }
2797 /* We assume first XSUB in &DB::sub is the called one. */
2798 if (PL_curcopdb) {
2799 SAVEVPTR(PL_curcop);
2800 PL_curcop = PL_curcopdb;
2801 PL_curcopdb = NULL;
2802 }
2803 /* Do we need to open block here? XXXX */
2804 (void)(*CvXSUB(cv))(aTHX_ cv);
2805
2806 /* Enforce some sanity in scalar context. */
2807 if (gimme == G_SCALAR && ++markix != PL_stack_sp - PL_stack_base ) {
2808 if (markix > PL_stack_sp - PL_stack_base)
2809 *(PL_stack_base + markix) = &PL_sv_undef;
2810 else
2811 *(PL_stack_base + markix) = *PL_stack_sp;
2812 PL_stack_sp = PL_stack_base + markix;
2813 }
2814 }
2815 LEAVE;
2816 return NORMAL;
2817 }
2818
9d4ba2ae 2819 /*NOTREACHED*/
f1025168
NC
2820 assert (0); /* Cannot get here. */
2821 /* This is deliberately moved here as spaghetti code to keep it out of the
2822 hot path. */
2823 {
2824 GV* autogv;
2825 SV* sub_name;
2826
2827 fooey:
2828 /* anonymous or undef'd function leaves us no recourse */
2829 if (CvANON(cv) || !(gv = CvGV(cv)))
2830 DIE(aTHX_ "Undefined subroutine called");
2831
2832 /* autoloaded stub? */
2833 if (cv != GvCV(gv)) {
2834 cv = GvCV(gv);
2835 }
2836 /* should call AUTOLOAD now? */
2837 else {
2838try_autoload:
2839 if ((autogv = gv_autoload4(GvSTASH(gv), GvNAME(gv), GvNAMELEN(gv),
2840 FALSE)))
2841 {
2842 cv = GvCV(autogv);
2843 }
2844 /* sorry */
2845 else {
2846 sub_name = sv_newmortal();
2847 gv_efullname3(sub_name, gv, Nullch);
35c1215d 2848 DIE(aTHX_ "Undefined subroutine &%"SVf" called", sub_name);
f1025168
NC
2849 }
2850 }
2851 if (!cv)
2852 DIE(aTHX_ "Not a CODE reference");
2853 goto retry;
2854 }
a0d0e21e
LW
2855}
2856
44a8e56a 2857void
864dbfa3 2858Perl_sub_crush_depth(pTHX_ CV *cv)
44a8e56a
PP
2859{
2860 if (CvANON(cv))
9014280d 2861 Perl_warner(aTHX_ packWARN(WARN_RECURSION), "Deep recursion on anonymous subroutine");
44a8e56a 2862 else {
aec46f14 2863 SV* const tmpstr = sv_newmortal();
44a8e56a 2864 gv_efullname3(tmpstr, CvGV(cv), Nullch);
35c1215d
NC
2865 Perl_warner(aTHX_ packWARN(WARN_RECURSION), "Deep recursion on subroutine \"%"SVf"\"",
2866 tmpstr);
44a8e56a
PP
2867 }
2868}
2869
a0d0e21e
LW
2870PP(pp_aelem)
2871{
39644a26 2872 dSP;
a0d0e21e 2873 SV** svp;
a3b680e6 2874 SV* const elemsv = POPs;
d804643f 2875 IV elem = SvIV(elemsv);
0bcc34c2 2876 AV* const av = (AV*)POPs;
e1ec3a88
AL
2877 const U32 lval = PL_op->op_flags & OPf_MOD || LVRET;
2878 const U32 defer = (PL_op->op_private & OPpLVAL_DEFER) && (elem > av_len(av));
be6c24e0 2879 SV *sv;
a0d0e21e 2880
e35c1634 2881 if (SvROK(elemsv) && !SvGAMAGIC(elemsv) && ckWARN(WARN_MISC))
35c1215d 2882 Perl_warner(aTHX_ packWARN(WARN_MISC), "Use of reference \"%"SVf"\" as array index", elemsv);
748a9306 2883 if (elem > 0)
3280af22 2884 elem -= PL_curcop->cop_arybase;
a0d0e21e
LW
2885 if (SvTYPE(av) != SVt_PVAV)
2886 RETPUSHUNDEF;
68dc0745 2887 svp = av_fetch(av, elem, lval && !defer);
a0d0e21e 2888 if (lval) {
2b573ace 2889#ifdef PERL_MALLOC_WRAP
2b573ace 2890 if (SvUOK(elemsv)) {
a9c4fd4e 2891 const UV uv = SvUV(elemsv);
2b573ace
JH
2892 elem = uv > IV_MAX ? IV_MAX : uv;
2893 }
2894 else if (SvNOK(elemsv))
2895 elem = (IV)SvNV(elemsv);
a3b680e6
AL
2896 if (elem > 0) {
2897 static const char oom_array_extend[] =
2898 "Out of memory during array extend"; /* Duplicated in av.c */
2b573ace 2899 MEM_WRAP_CHECK_1(elem,SV*,oom_array_extend);
a3b680e6 2900 }
2b573ace 2901#endif
3280af22 2902 if (!svp || *svp == &PL_sv_undef) {
68dc0745
PP
2903 SV* lv;
2904 if (!defer)
cea2e8a9 2905 DIE(aTHX_ PL_no_aelem, elem);
68dc0745
PP
2906 lv = sv_newmortal();
2907 sv_upgrade(lv, SVt_PVLV);
2908 LvTYPE(lv) = 'y';
14befaf4 2909 sv_magic(lv, Nullsv, PERL_MAGIC_defelem, Nullch, 0);
68dc0745
PP
2910 LvTARG(lv) = SvREFCNT_inc(av);
2911 LvTARGOFF(lv) = elem;
2912 LvTARGLEN(lv) = 1;
2913 PUSHs(lv);
2914 RETURN;
2915 }
bfc4de9f 2916 if (PL_op->op_private & OPpLVAL_INTRO)
161b7d16 2917 save_aelem(av, elem, svp);
533c011a
NIS
2918 else if (PL_op->op_private & OPpDEREF)
2919 vivify_ref(*svp, PL_op->op_private & OPpDEREF);
a0d0e21e 2920 }
3280af22 2921 sv = (svp ? *svp : &PL_sv_undef);
be6c24e0
GS
2922 if (!lval && SvGMAGICAL(sv)) /* see note in pp_helem() */
2923 sv = sv_mortalcopy(sv);
2924 PUSHs(sv);
a0d0e21e
LW
2925 RETURN;
2926}
2927
02a9e968 2928void
864dbfa3 2929Perl_vivify_ref(pTHX_ SV *sv, U32 to_what)
02a9e968 2930{
5b295bef 2931 SvGETMAGIC(sv);
02a9e968
CS
2932 if (!SvOK(sv)) {
2933 if (SvREADONLY(sv))
cea2e8a9 2934 Perl_croak(aTHX_ PL_no_modify);
5f05dabc
PP
2935 if (SvTYPE(sv) < SVt_RV)
2936 sv_upgrade(sv, SVt_RV);
2937 else if (SvTYPE(sv) >= SVt_PV) {
8bd4d4c5 2938 SvPV_free(sv);
b162af07
SP
2939 SvLEN_set(sv, 0);
2940 SvCUR_set(sv, 0);
5f05dabc 2941 }
68dc0745 2942 switch (to_what) {
5f05dabc 2943 case OPpDEREF_SV:
b162af07 2944 SvRV_set(sv, NEWSV(355,0));
5f05dabc
PP
2945 break;
2946 case OPpDEREF_AV:
b162af07 2947 SvRV_set(sv, (SV*)newAV());
5f05dabc
PP
2948 break;
2949 case OPpDEREF_HV:
b162af07 2950 SvRV_set(sv, (SV*)newHV());
5f05dabc
PP
2951 break;
2952 }
02a9e968
CS
2953 SvROK_on(sv);
2954 SvSETMAGIC(sv);
2955 }
2956}
2957
a0d0e21e
LW
2958PP(pp_method)
2959{
39644a26 2960 dSP;
890ce7af 2961 SV* const sv = TOPs;
f5d5a27c
CS
2962
2963 if (SvROK(sv)) {
890ce7af 2964 SV* const rsv = SvRV(sv);
f5d5a27c
CS
2965 if (SvTYPE(rsv) == SVt_PVCV) {
2966 SETs(rsv);
2967 RETURN;
2968 }
2969 }
2970
2971 SETs(method_common(sv, Null(U32*)));
2972 RETURN;
2973}
2974
2975PP(pp_method_named)
2976{
39644a26 2977 dSP;
890ce7af 2978 SV* const sv = cSVOP_sv;
c158a4fd 2979 U32 hash = SvSHARED_HASH(sv);
f5d5a27c
CS
2980
2981 XPUSHs(method_common(sv, &hash));
2982 RETURN;
2983}
2984
2985STATIC SV *
2986S_method_common(pTHX_ SV* meth, U32* hashp)
2987{
a0d0e21e
LW
2988 SV* ob;
2989 GV* gv;
56304f61 2990 HV* stash;
f5d5a27c 2991 STRLEN namelen;
46c461b5 2992 const char* packname = Nullch;
0dae17bd 2993 SV *packsv = Nullsv;
ac91690f 2994 STRLEN packlen;
46c461b5
AL
2995 const char * const name = SvPV_const(meth, namelen);
2996 SV * const sv = *(PL_stack_base + TOPMARK + 1);
f5d5a27c 2997
4f1b7578
SC
2998 if (!sv)
2999 Perl_croak(aTHX_ "Can't call method \"%s\" on an undefined value", name);
3000
5b295bef 3001 SvGETMAGIC(sv);
a0d0e21e 3002 if (SvROK(sv))
16d20bd9 3003 ob = (SV*)SvRV(sv);
a0d0e21e
LW
3004 else {
3005 GV* iogv;
a0d0e21e 3006
af09ea45 3007 /* this isn't a reference */
5c144d81 3008 if(SvOK(sv) && (packname = SvPV_const(sv, packlen))) {
b464bac0 3009 const HE* const he = hv_fetch_ent(PL_stashcache, sv, 0, 0);
081fc587 3010 if (he) {
5e6396ae 3011 stash = INT2PTR(HV*,SvIV(HeVAL(he)));
081fc587
AB
3012 goto fetch;
3013 }
3014 }
3015
a0d0e21e 3016 if (!SvOK(sv) ||
05f5af9a 3017 !(packname) ||
7a5fd60d 3018 !(iogv = gv_fetchsv(sv, FALSE, SVt_PVIO)) ||
a0d0e21e
LW
3019 !(ob=(SV*)GvIO(iogv)))
3020 {
af09ea45 3021 /* this isn't the name of a filehandle either */
1c846c1f 3022 if (!packname ||
fd400ab9 3023 ((UTF8_IS_START(*packname) && DO_UTF8(sv))
b86a2fa7 3024 ? !isIDFIRST_utf8((U8*)packname)
834a4ddd
LW
3025 : !isIDFIRST(*packname)
3026 ))
3027 {
f5d5a27c
CS
3028 Perl_croak(aTHX_ "Can't call method \"%s\" %s", name,
3029 SvOK(sv) ? "without a package or object reference"
3030 : "on an undefined value");
834a4ddd 3031 }
af09ea45
IK
3032 /* assume it's a package name */
3033 stash = gv_stashpvn(packname, packlen, FALSE);
0dae17bd
GS
3034 if (!stash)
3035 packsv = sv;
081fc587 3036 else {
5e6396ae 3037 SV* ref = newSViv(PTR2IV(stash));
7e8961ec
AB
3038 hv_store(PL_stashcache, packname, packlen, ref, 0);
3039 }
ac91690f 3040 goto fetch;
a0d0e21e 3041 }
af09ea45 3042 /* it _is_ a filehandle name -- replace with a reference */
3280af22 3043 *(PL_stack_base + TOPMARK + 1) = sv_2mortal(newRV((SV*)iogv));
a0d0e21e
LW
3044 }
3045
af09ea45 3046 /* if we got here, ob should be a reference or a glob */
f0d43078
GS
3047 if (!ob || !(SvOBJECT(ob)
3048 || (SvTYPE(ob) == SVt_PVGV && (ob = (SV*)GvIO((GV*)ob))
3049 && SvOBJECT(ob))))
3050 {
f5d5a27c
CS
3051 Perl_croak(aTHX_ "Can't call method \"%s\" on unblessed reference",
3052 name);
f0d43078 3053 }
a0d0e21e 3054
56304f61 3055 stash = SvSTASH(ob);
a0d0e21e 3056
ac91690f 3057 fetch:
af09ea45
IK
3058 /* NOTE: stash may be null, hope hv_fetch_ent and
3059 gv_fetchmethod can cope (it seems they can) */
3060
f5d5a27c
CS
3061 /* shortcut for simple names */
3062 if (hashp) {
b464bac0 3063 const HE* const he = hv_fetch_ent(stash, meth, 0, *hashp);
f5d5a27c
CS
3064 if (he) {
3065 gv = (GV*)HeVAL(he);
3066 if (isGV(gv) && GvCV(gv) &&
3067 (!GvCVGEN(gv) || GvCVGEN(gv) == PL_sub_generation))
3068 return (SV*)GvCV(gv);
3069 }
3070 }
3071
0dae17bd 3072 gv = gv_fetchmethod(stash ? stash : (HV*)packsv, name);
af09ea45 3073
56304f61 3074 if (!gv) {
af09ea45
IK
3075 /* This code tries to figure out just what went wrong with
3076 gv_fetchmethod. It therefore needs to duplicate a lot of
3077 the internals of that function. We can't move it inside
3078 Perl_gv_fetchmethod_autoload(), however, since that would
3079 cause UNIVERSAL->can("NoSuchPackage::foo") to croak, and we
3080 don't want that.
3081 */
a9c4fd4e
AL
3082 const char* leaf = name;
3083 const char* sep = Nullch;
3084 const char* p;
56304f61
CS
3085
3086 for (p = name; *p; p++) {
3087 if (*p == '\'')
3088 sep = p, leaf = p + 1;
3089 else if (*p == ':' && *(p + 1) == ':')
3090 sep = p, leaf = p + 2;
3091 }
3092 if (!sep || ((sep - name) == 5 && strnEQ(name, "SUPER", 5))) {
9b9d0b15
NC
3093 /* the method name is unqualified or starts with SUPER:: */
3094 bool need_strlen = 1;
3095 if (sep) {
3096 packname = CopSTASHPV(PL_curcop);
3097 }
3098 else if (stash) {
46c461b5 3099 HEK * const packhek = HvNAME_HEK(stash);
9b9d0b15
NC
3100 if (packhek) {
3101 packname = HEK_KEY(packhek);
3102 packlen = HEK_LEN(packhek);
3103 need_strlen = 0;
3104 } else {
3105 goto croak;
3106 }
3107 }
3108
3109 if (!packname) {
3110 croak:
e27ad1f2
AV
3111 Perl_croak(aTHX_
3112 "Can't use anonymous symbol table for method lookup");
9b9d0b15
NC
3113 }
3114 else if (need_strlen)
e27ad1f2 3115 packlen = strlen(packname);
9b9d0b15 3116
56304f61
CS
3117 }
3118 else {
af09ea45 3119 /* the method name is qualified */
56304f61
CS
3120 packname = name;
3121 packlen = sep - name;
3122 }
af09ea45
IK
3123
3124 /* we're relying on gv_fetchmethod not autovivifying the stash */
3125 if (gv_stashpvn(packname, packlen, FALSE)) {
c1899e02 3126 Perl_croak(aTHX_
af09ea45
IK
3127 "Can't locate object method \"%s\" via package \"%.*s\"",
3128 leaf, (int)packlen, packname);
c1899e02
GS
3129 }
3130 else {
3131 Perl_croak(aTHX_
af09ea45
IK
3132 "Can't locate object method \"%s\" via package \"%.*s\""
3133 " (perhaps you forgot to load \"%.*s\"?)",
3134 leaf, (int)packlen, packname, (int)packlen, packname);
c1899e02 3135 }
56304f61 3136 }
f5d5a27c 3137 return isGV(gv) ? (SV*)GvCV(gv) : (SV*)gv;
a0d0e21e 3138}
241d1a3b
NC
3139
3140/*
3141 * Local variables:
3142 * c-indentation-style: bsd
3143 * c-basic-offset: 4
3144 * indent-tabs-mode: t
3145 * End:
3146 *
37442d52
RGS
3147 * ex: set ts=8 sts=4 sw=4 noet:
3148 */