forked from schacon/perl
/
pp_hot.c
3134 lines (2920 loc) · 76.2 KB
/
pp_hot.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/* pp_hot.c
*
* Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
* 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 by Larry Wall and others
*
* You may distribute under the terms of either the GNU General Public
* License or the Artistic License, as specified in the README file.
*
*/
/*
* Then he heard Merry change the note, and up went the Horn-cry of Buckland,
* shaking the air.
*
* Awake! Awake! Fear, Fire, Foes! Awake!
* Fire, Foes! Awake!
*/
/* This file contains 'hot' pp ("push/pop") functions that
* execute the opcodes that make up a perl program. A typical pp function
* expects to find its arguments on the stack, and usually pushes its
* results onto the stack, hence the 'pp' terminology. Each OP structure
* contains a pointer to the relevant pp_foo() function.
*
* By 'hot', we mean common ops whose execution speed is critical.
* By gathering them together into a single file, we encourage
* CPU cache hits on hot code. Also it could be taken as a warning not to
* change any code in this file unless you're sure it won't affect
* performance.
*/
#include "EXTERN.h"
#define PERL_IN_PP_HOT_C
#include "perl.h"
/* Hot code. */
PP(pp_const)
{
dVAR;
dSP;
if ( PL_op->op_flags & OPf_SPECIAL )
/* This is a const op added to hold the hints hash for
pp_entereval. The hash can be modified by the code
being eval'ed, so we return a copy instead. */
XPUSHs(sv_2mortal((SV*)Perl_hv_copy_hints_hv(aTHX_ (HV*)cSVOP_sv)));
else
/* Normal const. */
XPUSHs(cSVOP_sv);
RETURN;
}
PP(pp_nextstate)
{
dVAR;
PL_curcop = (COP*)PL_op;
TAINT_NOT; /* Each statement is presumed innocent */
PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
FREETMPS;
return NORMAL;
}
PP(pp_gvsv)
{
dVAR;
dSP;
EXTEND(SP,1);
if (PL_op->op_private & OPpLVAL_INTRO)
PUSHs(save_scalar(cGVOP_gv));
else
PUSHs(GvSVn(cGVOP_gv));
RETURN;
}
PP(pp_null)
{
dVAR;
return NORMAL;
}
PP(pp_setstate)
{
dVAR;
PL_curcop = (COP*)PL_op;
return NORMAL;
}
PP(pp_pushmark)
{
dVAR;
PUSHMARK(PL_stack_sp);
return NORMAL;
}
PP(pp_stringify)
{
dVAR; dSP; dTARGET;
sv_copypv(TARG,TOPs);
SETTARG;
RETURN;
}
PP(pp_gv)
{
dVAR; dSP;
XPUSHs((SV*)cGVOP_gv);
RETURN;
}
PP(pp_and)
{
dVAR; dSP;
if (!SvTRUE(TOPs))
RETURN;
else {
if (PL_op->op_type == OP_AND)
--SP;
RETURNOP(cLOGOP->op_other);
}
}
PP(pp_sassign)
{
dVAR; dSP; dPOPTOPssrl;
if (PL_op->op_private & OPpASSIGN_BACKWARDS) {
SV * const temp = left;
left = right; right = temp;
}
if (PL_tainting && PL_tainted && !SvTAINTED(left))
TAINT_NOT;
if (PL_op->op_private & OPpASSIGN_CV_TO_GV) {
SV * const cv = SvRV(left);
const U32 cv_type = SvTYPE(cv);
const U32 gv_type = SvTYPE(right);
const bool got_coderef = cv_type == SVt_PVCV || cv_type == SVt_PVFM;
if (!got_coderef) {
assert(SvROK(cv));
}
/* Can do the optimisation if right (LVALUE) is not a typeglob,
left (RVALUE) is a reference to something, and we're in void
context. */
if (!got_coderef && gv_type != SVt_PVGV && GIMME_V == G_VOID) {
/* Is the target symbol table currently empty? */
GV * const gv = gv_fetchsv(right, GV_NOINIT, SVt_PVGV);
if (SvTYPE(gv) != SVt_PVGV && !SvOK(gv)) {
/* Good. Create a new proxy constant subroutine in the target.
The gv becomes a(nother) reference to the constant. */
SV *const value = SvRV(cv);
SvUPGRADE((SV *)gv, SVt_RV);
SvPCS_IMPORTED_on(gv);
SvRV_set(gv, value);
SvREFCNT_inc_simple_void(value);
SETs(right);
RETURN;
}
}
/* Need to fix things up. */
if (gv_type != SVt_PVGV) {
/* Need to fix GV. */
right = (SV*)gv_fetchsv(right, GV_ADD, SVt_PVGV);
}
if (!got_coderef) {
/* We've been returned a constant rather than a full subroutine,
but they expect a subroutine reference to apply. */
ENTER;
SvREFCNT_inc_void(SvRV(cv));
/* newCONSTSUB takes a reference count on the passed in SV
from us. We set the name to NULL, otherwise we get into
all sorts of fun as the reference to our new sub is
donated to the GV that we're about to assign to.
*/
SvRV_set(left, (SV *)newCONSTSUB(GvSTASH(right), NULL,
SvRV(cv)));
SvREFCNT_dec(cv);
LEAVE;
}
}
SvSetMagicSV(right, left);
SETs(right);
RETURN;
}
PP(pp_cond_expr)
{
dVAR; dSP;
if (SvTRUEx(POPs))
RETURNOP(cLOGOP->op_other);
else
RETURNOP(cLOGOP->op_next);
}
PP(pp_unstack)
{
dVAR;
I32 oldsave;
TAINT_NOT; /* Each statement is presumed innocent */
PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
FREETMPS;
oldsave = PL_scopestack[PL_scopestack_ix - 1];
LEAVE_SCOPE(oldsave);
return NORMAL;
}
PP(pp_concat)
{
dVAR; dSP; dATARGET; tryAMAGICbin(concat,opASSIGN);
{
dPOPTOPssrl;
bool lbyte;
STRLEN rlen;
const char *rpv = NULL;
bool rbyte = FALSE;
bool rcopied = FALSE;
if (TARG == right && right != left) {
/* mg_get(right) may happen here ... */
rpv = SvPV_const(right, rlen);
rbyte = !DO_UTF8(right);
right = sv_2mortal(newSVpvn(rpv, rlen));
rpv = SvPV_const(right, rlen); /* no point setting UTF-8 here */
rcopied = TRUE;
}
if (TARG != left) {
STRLEN llen;
const char* const lpv = SvPV_const(left, llen); /* mg_get(left) may happen here */
lbyte = !DO_UTF8(left);
sv_setpvn(TARG, lpv, llen);
if (!lbyte)
SvUTF8_on(TARG);
else
SvUTF8_off(TARG);
}
else { /* TARG == left */
STRLEN llen;
SvGETMAGIC(left); /* or mg_get(left) may happen here */
if (!SvOK(TARG)) {
if (left == right && ckWARN(WARN_UNINITIALIZED))
report_uninit(right);
sv_setpvn(left, "", 0);
}
(void)SvPV_nomg_const(left, llen); /* Needed to set UTF8 flag */
lbyte = !DO_UTF8(left);
if (IN_BYTES)
SvUTF8_off(TARG);
}
/* or mg_get(right) may happen here */
if (!rcopied) {
rpv = SvPV_const(right, rlen);
rbyte = !DO_UTF8(right);
}
if (lbyte != rbyte) {
if (lbyte)
sv_utf8_upgrade_nomg(TARG);
else {
if (!rcopied)
right = sv_2mortal(newSVpvn(rpv, rlen));
sv_utf8_upgrade_nomg(right);
rpv = SvPV_const(right, rlen);
}
}
sv_catpvn_nomg(TARG, rpv, rlen);
SETTARG;
RETURN;
}
}
PP(pp_padsv)
{
dVAR; dSP; dTARGET;
XPUSHs(TARG);
if (PL_op->op_flags & OPf_MOD) {
if (PL_op->op_private & OPpLVAL_INTRO)
if (!(PL_op->op_private & OPpPAD_STATE))
SAVECLEARSV(PAD_SVl(PL_op->op_targ));
if (PL_op->op_private & OPpDEREF) {
PUTBACK;
vivify_ref(PAD_SVl(PL_op->op_targ), PL_op->op_private & OPpDEREF);
SPAGAIN;
}
}
RETURN;
}
PP(pp_readline)
{
dVAR;
tryAMAGICunTARGET(iter, 0);
PL_last_in_gv = (GV*)(*PL_stack_sp--);
if (SvTYPE(PL_last_in_gv) != SVt_PVGV) {
if (SvROK(PL_last_in_gv) && SvTYPE(SvRV(PL_last_in_gv)) == SVt_PVGV)
PL_last_in_gv = (GV*)SvRV(PL_last_in_gv);
else {
dSP;
XPUSHs((SV*)PL_last_in_gv);
PUTBACK;
pp_rv2gv();
PL_last_in_gv = (GV*)(*PL_stack_sp--);
}
}
return do_readline();
}
PP(pp_eq)
{
dVAR; dSP; tryAMAGICbinSET(eq,0);
#ifndef NV_PRESERVES_UV
if (SvROK(TOPs) && !SvAMAGIC(TOPs) && SvROK(TOPm1s) && !SvAMAGIC(TOPm1s)) {
SP--;
SETs(boolSV(SvRV(TOPs) == SvRV(TOPp1s)));
RETURN;
}
#endif
#ifdef PERL_PRESERVE_IVUV
SvIV_please(TOPs);
if (SvIOK(TOPs)) {
/* Unless the left argument is integer in range we are going
to have to use NV maths. Hence only attempt to coerce the
right argument if we know the left is integer. */
SvIV_please(TOPm1s);
if (SvIOK(TOPm1s)) {
const bool auvok = SvUOK(TOPm1s);
const bool buvok = SvUOK(TOPs);
if (auvok == buvok) { /* ## IV == IV or UV == UV ## */
/* Casting IV to UV before comparison isn't going to matter
on 2s complement. On 1s complement or sign&magnitude
(if we have any of them) it could to make negative zero
differ from normal zero. As I understand it. (Need to
check - is negative zero implementation defined behaviour
anyway?). NWC */
const UV buv = SvUVX(POPs);
const UV auv = SvUVX(TOPs);
SETs(boolSV(auv == buv));
RETURN;
}
{ /* ## Mixed IV,UV ## */
SV *ivp, *uvp;
IV iv;
/* == is commutative so doesn't matter which is left or right */
if (auvok) {
/* top of stack (b) is the iv */
ivp = *SP;
uvp = *--SP;
} else {
uvp = *SP;
ivp = *--SP;
}
iv = SvIVX(ivp);
if (iv < 0)
/* As uv is a UV, it's >0, so it cannot be == */
SETs(&PL_sv_no);
else
/* we know iv is >= 0 */
SETs(boolSV((UV)iv == SvUVX(uvp)));
RETURN;
}
}
}
#endif
{
#if defined(NAN_COMPARE_BROKEN) && defined(Perl_isnan)
dPOPTOPnnrl;
if (Perl_isnan(left) || Perl_isnan(right))
RETSETNO;
SETs(boolSV(left == right));
#else
dPOPnv;
SETs(boolSV(TOPn == value));
#endif
RETURN;
}
}
PP(pp_preinc)
{
dVAR; dSP;
if (SvTYPE(TOPs) >= SVt_PVGV && SvTYPE(TOPs) != SVt_PVLV)
DIE(aTHX_ PL_no_modify);
if (!SvREADONLY(TOPs) && SvIOK_notUV(TOPs) && !SvNOK(TOPs) && !SvPOK(TOPs)
&& SvIVX(TOPs) != IV_MAX)
{
SvIV_set(TOPs, SvIVX(TOPs) + 1);
SvFLAGS(TOPs) &= ~(SVp_NOK|SVp_POK);
}
else /* Do all the PERL_PRESERVE_IVUV conditionals in sv_inc */
sv_inc(TOPs);
SvSETMAGIC(TOPs);
return NORMAL;
}
PP(pp_or)
{
dVAR; dSP;
if (SvTRUE(TOPs))
RETURN;
else {
if (PL_op->op_type == OP_OR)
--SP;
RETURNOP(cLOGOP->op_other);
}
}
PP(pp_defined)
{
dVAR; dSP;
register SV* sv;
bool defined;
const int op_type = PL_op->op_type;
const bool is_dor = (op_type == OP_DOR || op_type == OP_DORASSIGN);
if (is_dor) {
sv = TOPs;
if (!sv || !SvANY(sv)) {
if (op_type == OP_DOR)
--SP;
RETURNOP(cLOGOP->op_other);
}
}
else {
/* OP_DEFINED */
sv = POPs;
if (!sv || !SvANY(sv))
RETPUSHNO;
}
defined = FALSE;
switch (SvTYPE(sv)) {
case SVt_PVAV:
if (AvMAX(sv) >= 0 || SvGMAGICAL(sv) || (SvRMAGICAL(sv) && mg_find(sv, PERL_MAGIC_tied)))
defined = TRUE;
break;
case SVt_PVHV:
if (HvARRAY(sv) || SvGMAGICAL(sv) || (SvRMAGICAL(sv) && mg_find(sv, PERL_MAGIC_tied)))
defined = TRUE;
break;
case SVt_PVCV:
if (CvROOT(sv) || CvXSUB(sv))
defined = TRUE;
break;
default:
SvGETMAGIC(sv);
if (SvOK(sv))
defined = TRUE;
break;
}
if (is_dor) {
if(defined)
RETURN;
if(op_type == OP_DOR)
--SP;
RETURNOP(cLOGOP->op_other);
}
/* assuming OP_DEFINED */
if(defined)
RETPUSHYES;
RETPUSHNO;
}
PP(pp_add)
{
dVAR; dSP; dATARGET; bool useleft; tryAMAGICbin(add,opASSIGN);
useleft = USE_LEFT(TOPm1s);
#ifdef PERL_PRESERVE_IVUV
/* We must see if we can perform the addition with integers if possible,
as the integer code detects overflow while the NV code doesn't.
If either argument hasn't had a numeric conversion yet attempt to get
the IV. It's important to do this now, rather than just assuming that
it's not IOK as a PV of "9223372036854775806" may not take well to NV
addition, and an SV which is NOK, NV=6.0 ought to be coerced to
integer in case the second argument is IV=9223372036854775806
We can (now) rely on sv_2iv to do the right thing, only setting the
public IOK flag if the value in the NV (or PV) slot is truly integer.
A side effect is that this also aggressively prefers integer maths over
fp maths for integer values.
How to detect overflow?
C 99 section 6.2.6.1 says
The range of nonnegative values of a signed integer type is a subrange
of the corresponding unsigned integer type, and the representation of
the same value in each type is the same. A computation involving
unsigned operands can never overflow, because a result that cannot be
represented by the resulting unsigned integer type is reduced modulo
the number that is one greater than the largest value that can be
represented by the resulting type.
(the 9th paragraph)
which I read as "unsigned ints wrap."
signed integer overflow seems to be classed as "exception condition"
If an exceptional condition occurs during the evaluation of an
expression (that is, if the result is not mathematically defined or not
in the range of representable values for its type), the behavior is
undefined.
(6.5, the 5th paragraph)
I had assumed that on 2s complement machines signed arithmetic would
wrap, hence coded pp_add and pp_subtract on the assumption that
everything perl builds on would be happy. After much wailing and
gnashing of teeth it would seem that irix64 knows its ANSI spec well,
knows that it doesn't need to, and doesn't. Bah. Anyway, the all-
unsigned code below is actually shorter than the old code. :-)
*/
SvIV_please(TOPs);
if (SvIOK(TOPs)) {
/* Unless the left argument is integer in range we are going to have to
use NV maths. Hence only attempt to coerce the right argument if
we know the left is integer. */
register UV auv = 0;
bool auvok = FALSE;
bool a_valid = 0;
if (!useleft) {
auv = 0;
a_valid = auvok = 1;
/* left operand is undef, treat as zero. + 0 is identity,
Could SETi or SETu right now, but space optimise by not adding
lots of code to speed up what is probably a rarish case. */
} else {
/* Left operand is defined, so is it IV? */
SvIV_please(TOPm1s);
if (SvIOK(TOPm1s)) {
if ((auvok = SvUOK(TOPm1s)))
auv = SvUVX(TOPm1s);
else {
register const IV aiv = SvIVX(TOPm1s);
if (aiv >= 0) {
auv = aiv;
auvok = 1; /* Now acting as a sign flag. */
} else { /* 2s complement assumption for IV_MIN */
auv = (UV)-aiv;
}
}
a_valid = 1;
}
}
if (a_valid) {
bool result_good = 0;
UV result;
register UV buv;
bool buvok = SvUOK(TOPs);
if (buvok)
buv = SvUVX(TOPs);
else {
register const IV biv = SvIVX(TOPs);
if (biv >= 0) {
buv = biv;
buvok = 1;
} else
buv = (UV)-biv;
}
/* ?uvok if value is >= 0. basically, flagged as UV if it's +ve,
else "IV" now, independent of how it came in.
if a, b represents positive, A, B negative, a maps to -A etc
a + b => (a + b)
A + b => -(a - b)
a + B => (a - b)
A + B => -(a + b)
all UV maths. negate result if A negative.
add if signs same, subtract if signs differ. */
if (auvok ^ buvok) {
/* Signs differ. */
if (auv >= buv) {
result = auv - buv;
/* Must get smaller */
if (result <= auv)
result_good = 1;
} else {
result = buv - auv;
if (result <= buv) {
/* result really should be -(auv-buv). as its negation
of true value, need to swap our result flag */
auvok = !auvok;
result_good = 1;
}
}
} else {
/* Signs same */
result = auv + buv;
if (result >= auv)
result_good = 1;
}
if (result_good) {
SP--;
if (auvok)
SETu( result );
else {
/* Negate result */
if (result <= (UV)IV_MIN)
SETi( -(IV)result );
else {
/* result valid, but out of range for IV. */
SETn( -(NV)result );
}
}
RETURN;
} /* Overflow, drop through to NVs. */
}
}
#endif
{
dPOPnv;
if (!useleft) {
/* left operand is undef, treat as zero. + 0.0 is identity. */
SETn(value);
RETURN;
}
SETn( value + TOPn );
RETURN;
}
}
PP(pp_aelemfast)
{
dVAR; dSP;
AV * const av = PL_op->op_flags & OPf_SPECIAL ?
(AV*)PAD_SV(PL_op->op_targ) : GvAV(cGVOP_gv);
const U32 lval = PL_op->op_flags & OPf_MOD;
SV** const svp = av_fetch(av, PL_op->op_private, lval);
SV *sv = (svp ? *svp : &PL_sv_undef);
EXTEND(SP, 1);
if (!lval && SvGMAGICAL(sv)) /* see note in pp_helem() */
sv = sv_mortalcopy(sv);
PUSHs(sv);
RETURN;
}
PP(pp_join)
{
dVAR; dSP; dMARK; dTARGET;
MARK++;
do_join(TARG, *MARK, MARK, SP);
SP = MARK;
SETs(TARG);
RETURN;
}
PP(pp_pushre)
{
dVAR; dSP;
#ifdef DEBUGGING
/*
* We ass_u_me that LvTARGOFF() comes first, and that two STRLENs
* will be enough to hold an OP*.
*/
SV* const sv = sv_newmortal();
sv_upgrade(sv, SVt_PVLV);
LvTYPE(sv) = '/';
Copy(&PL_op, &LvTARGOFF(sv), 1, OP*);
XPUSHs(sv);
#else
XPUSHs((SV*)PL_op);
#endif
RETURN;
}
/* Oversized hot code. */
PP(pp_print)
{
dVAR; dSP; dMARK; dORIGMARK;
IO *io;
register PerlIO *fp;
MAGIC *mg;
GV * const gv = (PL_op->op_flags & OPf_STACKED) ? (GV*)*++MARK : PL_defoutgv;
if (gv && (io = GvIO(gv))
&& (mg = SvTIED_mg((SV*)io, PERL_MAGIC_tiedscalar)))
{
had_magic:
if (MARK == ORIGMARK) {
/* If using default handle then we need to make space to
* pass object as 1st arg, so move other args up ...
*/
MEXTEND(SP, 1);
++MARK;
Move(MARK, MARK + 1, (SP - MARK) + 1, SV*);
++SP;
}
PUSHMARK(MARK - 1);
*MARK = SvTIED_obj((SV*)io, mg);
PUTBACK;
ENTER;
call_method("PRINT", G_SCALAR);
LEAVE;
SPAGAIN;
MARK = ORIGMARK + 1;
*MARK = *SP;
SP = MARK;
RETURN;
}
if (!(io = GvIO(gv))) {
if ((GvEGV(gv)) && (io = GvIO(GvEGV(gv)))
&& (mg = SvTIED_mg((SV*)io, PERL_MAGIC_tiedscalar)))
goto had_magic;
if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
report_evil_fh(gv, io, PL_op->op_type);
SETERRNO(EBADF,RMS_IFI);
goto just_say_no;
}
else if (!(fp = IoOFP(io))) {
if (ckWARN2(WARN_CLOSED, WARN_IO)) {
if (IoIFP(io))
report_evil_fh(gv, io, OP_phoney_INPUT_ONLY);
else if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
report_evil_fh(gv, io, PL_op->op_type);
}
SETERRNO(EBADF,IoIFP(io)?RMS_FAC:RMS_IFI);
goto just_say_no;
}
else {
MARK++;
if (PL_ofs_sv && SvOK(PL_ofs_sv)) {
while (MARK <= SP) {
if (!do_print(*MARK, fp))
break;
MARK++;
if (MARK <= SP) {
if (!do_print(PL_ofs_sv, fp)) { /* $, */
MARK--;
break;
}
}
}
}
else {
while (MARK <= SP) {
if (!do_print(*MARK, fp))
break;
MARK++;
}
}
if (MARK <= SP)
goto just_say_no;
else {
if (PL_op->op_type == OP_SAY) {
if (PerlIO_write(fp, "\n", 1) == 0 || PerlIO_error(fp))
goto just_say_no;
}
else if (PL_ors_sv && SvOK(PL_ors_sv))
if (!do_print(PL_ors_sv, fp)) /* $\ */
goto just_say_no;
if (IoFLAGS(io) & IOf_FLUSH)
if (PerlIO_flush(fp) == EOF)
goto just_say_no;
}
}
SP = ORIGMARK;
XPUSHs(&PL_sv_yes);
RETURN;
just_say_no:
SP = ORIGMARK;
XPUSHs(&PL_sv_undef);
RETURN;
}
PP(pp_rv2av)
{
dVAR; dSP; dTOPss;
const I32 gimme = GIMME_V;
static const char return_array_to_lvalue_scalar[] = "Can't return array to lvalue scalar context";
static const char return_hash_to_lvalue_scalar[] = "Can't return hash to lvalue scalar context";
static const char an_array[] = "an ARRAY";
static const char a_hash[] = "a HASH";
const bool is_pp_rv2av = PL_op->op_type == OP_RV2AV;
const svtype type = is_pp_rv2av ? SVt_PVAV : SVt_PVHV;
if (SvROK(sv)) {
wasref:
tryAMAGICunDEREF_var(is_pp_rv2av ? to_av_amg : to_hv_amg);
sv = SvRV(sv);
if (SvTYPE(sv) != type)
DIE(aTHX_ "Not %s reference", is_pp_rv2av ? an_array : a_hash);
if (PL_op->op_flags & OPf_REF) {
SETs(sv);
RETURN;
}
else if (LVRET) {
if (gimme != G_ARRAY)
Perl_croak(aTHX_ is_pp_rv2av ? return_array_to_lvalue_scalar
: return_hash_to_lvalue_scalar);
SETs(sv);
RETURN;
}
else if (PL_op->op_flags & OPf_MOD
&& PL_op->op_private & OPpLVAL_INTRO)
Perl_croak(aTHX_ PL_no_localize_ref);
}
else {
if (SvTYPE(sv) == type) {
if (PL_op->op_flags & OPf_REF) {
SETs(sv);
RETURN;
}
else if (LVRET) {
if (gimme != G_ARRAY)
Perl_croak(aTHX_
is_pp_rv2av ? return_array_to_lvalue_scalar
: return_hash_to_lvalue_scalar);
SETs(sv);
RETURN;
}
}
else {
GV *gv;
if (SvTYPE(sv) != SVt_PVGV) {
if (SvGMAGICAL(sv)) {
mg_get(sv);
if (SvROK(sv))
goto wasref;
}
gv = Perl_softref2xv(aTHX_ sv, is_pp_rv2av ? an_array : a_hash,
type, &sp);
if (!gv)
RETURN;
}
else {
gv = (GV*)sv;
}
sv = is_pp_rv2av ? (SV*)GvAVn(gv) : (SV*)GvHVn(gv);
if (PL_op->op_private & OPpLVAL_INTRO)
sv = is_pp_rv2av ? (SV*)save_ary(gv) : (SV*)save_hash(gv);
if (PL_op->op_flags & OPf_REF) {
SETs(sv);
RETURN;
}
else if (LVRET) {
if (gimme != G_ARRAY)
Perl_croak(aTHX_
is_pp_rv2av ? return_array_to_lvalue_scalar
: return_hash_to_lvalue_scalar);
SETs(sv);
RETURN;
}
}
}
if (is_pp_rv2av) {
AV *const av = (AV*)sv;
/* The guts of pp_rv2av, with no intenting change to preserve history
(until such time as we get tools that can do blame annotation across
whitespace changes. */
if (gimme == G_ARRAY) {
const I32 maxarg = AvFILL(av) + 1;
(void)POPs; /* XXXX May be optimized away? */
EXTEND(SP, maxarg);
if (SvRMAGICAL(av)) {
U32 i;
for (i=0; i < (U32)maxarg; i++) {
SV ** const svp = av_fetch(av, i, FALSE);
/* See note in pp_helem, and bug id #27839 */
SP[i+1] = svp
? SvGMAGICAL(*svp) ? sv_mortalcopy(*svp) : *svp
: &PL_sv_undef;
}
}
else {
Copy(AvARRAY(av), SP+1, maxarg, SV*);
}
SP += maxarg;
}
else if (gimme == G_SCALAR) {
dTARGET;
const I32 maxarg = AvFILL(av) + 1;
SETi(maxarg);
}
} else {
/* The guts of pp_rv2hv */
if (gimme == G_ARRAY) { /* array wanted */
*PL_stack_sp = sv;
return do_kv();
}
else if (gimme == G_SCALAR) {
dTARGET;
TARG = Perl_hv_scalar(aTHX_ (HV*)sv);
SPAGAIN;
SETTARG;
}
}
RETURN;
}
STATIC void
S_do_oddball(pTHX_ HV *hash, SV **relem, SV **firstrelem)
{
dVAR;
if (*relem) {
SV *tmpstr;
const HE *didstore;
if (ckWARN(WARN_MISC)) {
const char *err;
if (relem == firstrelem &&
SvROK(*relem) &&
(SvTYPE(SvRV(*relem)) == SVt_PVAV ||
SvTYPE(SvRV(*relem)) == SVt_PVHV))
{
err = "Reference found where even-sized list expected";
}
else
err = "Odd number of elements in hash assignment";
Perl_warner(aTHX_ packWARN(WARN_MISC), err);
}
tmpstr = newSV(0);
didstore = hv_store_ent(hash,*relem,tmpstr,0);
if (SvMAGICAL(hash)) {
if (SvSMAGICAL(tmpstr))
mg_set(tmpstr);
if (!didstore)
sv_2mortal(tmpstr);
}
TAINT_NOT;
}
}
PP(pp_aassign)
{
dVAR; dSP;
SV **lastlelem = PL_stack_sp;
SV **lastrelem = PL_stack_base + POPMARK;
SV **firstrelem = PL_stack_base + POPMARK + 1;
SV **firstlelem = lastrelem + 1;
register SV **relem;
register SV **lelem;
register SV *sv;
register AV *ary;
I32 gimme;
HV *hash;
I32 i;
int magic;
int duplicates = 0;
SV **firsthashrelem = NULL; /* "= 0" keeps gcc 2.95 quiet */
PL_delaymagic = DM_DELAY; /* catch simultaneous items */
gimme = GIMME_V;
/* If there's a common identifier on both sides we have to take
* special care that assigning the identifier on the left doesn't
* clobber a value on the right that's used later in the list.
*/
if (PL_op->op_private & (OPpASSIGN_COMMON)) {
EXTEND_MORTAL(lastrelem - firstrelem + 1);
for (relem = firstrelem; relem <= lastrelem; relem++) {
if ((sv = *relem)) {
TAINT_NOT; /* Each item is independent */
*relem = sv_mortalcopy(sv);
}
}
}
relem = firstrelem;
lelem = firstlelem;
ary = NULL;
hash = NULL;
while (lelem <= lastlelem) {
TAINT_NOT; /* Each item stands on its own, taintwise. */
sv = *lelem++;
switch (SvTYPE(sv)) {
case SVt_PVAV:
ary = (AV*)sv;
magic = SvMAGICAL(ary) != 0;
av_clear(ary);
av_extend(ary, lastrelem - relem);
i = 0;
while (relem <= lastrelem) { /* gobble up all the rest */
SV **didstore;
assert(*relem);
sv = newSVsv(*relem);
*(relem++) = sv;
didstore = av_store(ary,i++,sv);
if (magic) {