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defsubs_h.PL: Use correct variable in error msg
[perl5.git] / mg.c
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a0d0e21e 1/* mg.c
79072805 2 *
1129b882
NC		 3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
4 * 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 by Larry Wall and others
79072805
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 *
a0d0e21e
LW		 9 */
10
11/*
4ac71550
TC		 12 * Sam sat on the ground and put his head in his hands. 'I wish I had never
13 * come here, and I don't want to see no more magic,' he said, and fell silent.
14 *
15 * [p.363 of _The Lord of the Rings_, II/vii: "The Mirror of Galadriel"]
79072805
LW		 16 */
17
ccfc67b7
JH		 18/*
19=head1 Magical Functions
166f8a29
DM		 20
21"Magic" is special data attached to SV structures in order to give them
22"magical" properties. When any Perl code tries to read from, or assign to,
23an SV marked as magical, it calls the 'get' or 'set' function associated
24with that SV's magic. A get is called prior to reading an SV, in order to
ddfa107c 25give it a chance to update its internal value (get on $. writes the line
166f8a29
DM		 26number of the last read filehandle into to the SV's IV slot), while
27set is called after an SV has been written to, in order to allow it to make
ddfa107c 28use of its changed value (set on $/ copies the SV's new value to the
166f8a29
DM		 29PL_rs global variable).
30
31Magic is implemented as a linked list of MAGIC structures attached to the
32SV. Each MAGIC struct holds the type of the magic, a pointer to an array
33of functions that implement the get(), set(), length() etc functions,
34plus space for some flags and pointers. For example, a tied variable has
35a MAGIC structure that contains a pointer to the object associated with the
36tie.
37
ccfc67b7
JH		 38*/
39
79072805 40#include "EXTERN.h"
864dbfa3 41#define PERL_IN_MG_C
79072805
LW		 42#include "perl.h"
43
5cd24f17 44#if defined(HAS_GETGROUPS) || defined(HAS_SETGROUPS)
b7953727
JH		 45# ifdef I_GRP
46# include <grp.h>
47# endif
188ea221
CS		 48#endif
49
757f63d8
SP		 50#if defined(HAS_SETGROUPS)
51# ifndef NGROUPS
52# define NGROUPS 32
53# endif
54#endif
55
17aa7f3d
JH		 56#ifdef __hpux
57# include <sys/pstat.h>
58#endif
59
7636ea95
AB		 60#ifdef HAS_PRCTL_SET_NAME
61# include <sys/prctl.h>
62#endif
63
8aad04aa 64#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
b6455c53 65Signal_t Perl_csighandler(int sig, siginfo_t *, void *);
8aad04aa 66#else
e69880a5 67Signal_t Perl_csighandler(int sig);
8aad04aa 68#endif
e69880a5 69
9cffb111
OS		 70#ifdef __Lynx__
71/* Missing protos on LynxOS */
72void setruid(uid_t id);
73void seteuid(uid_t id);
74void setrgid(uid_t id);
75void setegid(uid_t id);
76#endif
77
c07a80fd 78/*
79 * Use the "DESTRUCTOR" scope cleanup to reinstate magic.
80 */
81
82struct magic_state {
83 SV* mgs_sv;
455ece5e 84 I32 mgs_ss_ix;
f9c6fee5
CS		 85 U32 mgs_magical;
86 bool mgs_readonly;
c07a80fd 87};
455ece5e 88/* MGS is typedef'ed to struct magic_state in perl.h */
76e3520e
GS		 89
90STATIC void
8fb26106 91S_save_magic(pTHX_ I32 mgs_ix, SV *sv)
c07a80fd 92{
97aff369 93 dVAR;
455ece5e 94 MGS* mgs;
7918f24d
NC		 95
96 PERL_ARGS_ASSERT_SAVE_MAGIC;
97
c07a80fd 98 assert(SvMAGICAL(sv));
d8b2590f
NC		 99 /* Turning READONLY off for a copy-on-write scalar (including shared
100 hash keys) is a bad idea. */
765f542d 101 if (SvIsCOW(sv))
9a265e59 102 sv_force_normal_flags(sv, 0);
c07a80fd 103
8772537c 104 SAVEDESTRUCTOR_X(S_restore_magic, INT2PTR(void*, (IV)mgs_ix));
455ece5e
AD		 105
106 mgs = SSPTR(mgs_ix, MGS*);
c07a80fd 107 mgs->mgs_sv = sv;
f9c6fee5
CS		 108 mgs->mgs_magical = SvMAGICAL(sv);
109 mgs->mgs_readonly = SvREADONLY(sv) != 0;
455ece5e 110 mgs->mgs_ss_ix = PL_savestack_ix; /* points after the saved destructor */
c07a80fd 111
112 SvMAGICAL_off(sv);
113 SvREADONLY_off(sv);
085bde85
NC		 114 if (!(SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK))) {
115 /* No public flags are set, so promote any private flags to public. */
116 SvFLAGS(sv) |= (SvFLAGS(sv) & (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
117 }
c07a80fd 118}
119
954c1994
GS		 120/*
121=for apidoc mg_magical
122
123Turns on the magical status of an SV. See C<sv_magic>.
124
125=cut
126*/
127
8990e307 128void
864dbfa3 129Perl_mg_magical(pTHX_ SV *sv)
8990e307 130{
e1ec3a88 131 const MAGIC* mg;
7918f24d 132 PERL_ARGS_ASSERT_MG_MAGICAL;
96a5add6 133 PERL_UNUSED_CONTEXT;
f9c6fee5
CS		 134
135 SvMAGICAL_off(sv);
218787bd 136 if ((mg = SvMAGIC(sv))) {
218787bd
VP		 137 do {
138 const MGVTBL* const vtbl = mg->mg_virtual;
139 if (vtbl) {
140 if (vtbl->svt_get && !(mg->mg_flags & MGf_GSKIP))
141 SvGMAGICAL_on(sv);
142 if (vtbl->svt_set)
143 SvSMAGICAL_on(sv);
144 if (vtbl->svt_clear)
145 SvRMAGICAL_on(sv);
146 }
147 } while ((mg = mg->mg_moremagic));
148 if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG)))
149 SvRMAGICAL_on(sv);
8990e307
LW		 150 }
151}
152
2767dea0
DM		 153
154/* is this container magic (%ENV, $1 etc), or value magic (pos, taint etc)? */
155
156STATIC bool
157S_is_container_magic(const MAGIC *mg)
158{
7918f24d 159 assert(mg);
2767dea0
DM		 160 switch (mg->mg_type) {
161 case PERL_MAGIC_bm:
162 case PERL_MAGIC_fm:
163 case PERL_MAGIC_regex_global:
164 case PERL_MAGIC_nkeys:
165#ifdef USE_LOCALE_COLLATE
166 case PERL_MAGIC_collxfrm:
167#endif
168 case PERL_MAGIC_qr:
169 case PERL_MAGIC_taint:
170 case PERL_MAGIC_vec:
171 case PERL_MAGIC_vstring:
172 case PERL_MAGIC_utf8:
173 case PERL_MAGIC_substr:
174 case PERL_MAGIC_defelem:
175 case PERL_MAGIC_arylen:
176 case PERL_MAGIC_pos:
177 case PERL_MAGIC_backref:
178 case PERL_MAGIC_arylen_p:
179 case PERL_MAGIC_rhash:
180 case PERL_MAGIC_symtab:
5afa72af 181 case PERL_MAGIC_tied: /* treat as value, so 'local @tied' isn't tied */
2767dea0
DM		 182 return 0;
183 default:
184 return 1;
185 }
186}
187
954c1994
GS		 188/*
189=for apidoc mg_get
190
191Do magic after a value is retrieved from the SV. See C<sv_magic>.
192
193=cut
194*/
195
79072805 196int
864dbfa3 197Perl_mg_get(pTHX_ SV *sv)
79072805 198{
97aff369 199 dVAR;
35a4481c 200 const I32 mgs_ix = SSNEW(sizeof(MGS));
f2338a2e 201 const bool was_temp = cBOOL(SvTEMP(sv));
f9c6fee5 202 bool have_new = 0;
ff76feab 203 MAGIC *newmg, *head, *cur, *mg;
20135930 204 /* guard against sv having being freed midway by holding a private
6683b158
NC		 205 reference. */
206
7918f24d
NC		 207 PERL_ARGS_ASSERT_MG_GET;
208
6683b158
NC		 209 /* sv_2mortal has this side effect of turning on the TEMP flag, which can
210 cause the SV's buffer to get stolen (and maybe other stuff).
211 So restore it.
212 */
46da273f 213 sv_2mortal(SvREFCNT_inc_simple_NN(sv));
6683b158
NC		 214 if (!was_temp) {
215 SvTEMP_off(sv);
216 }
217
455ece5e 218 save_magic(mgs_ix, sv);
463ee0b2 219
ff76feab
AMS		 220 /* We must call svt_get(sv, mg) for each valid entry in the linked
221 list of magic. svt_get() may delete the current entry, add new
222 magic to the head of the list, or upgrade the SV. AMS 20010810 */
223
224 newmg = cur = head = mg = SvMAGIC(sv);
225 while (mg) {
35a4481c 226 const MGVTBL * const vtbl = mg->mg_virtual;
f9c6fee5 227 MAGIC * const nextmg = mg->mg_moremagic; /* it may delete itself */
ff76feab 228
2b260de0 229 if (!(mg->mg_flags & MGf_GSKIP) && vtbl && vtbl->svt_get) {
316ad4fe 230 CALL_FPTR(vtbl->svt_get)(aTHX_ sv, mg);
b77f7d40 231
58f82c5c
DM		 232 /* guard against magic having been deleted - eg FETCH calling
233 * untie */
f9c6fee5
CS		 234 if (!SvMAGIC(sv)) {
235 (SSPTR(mgs_ix, MGS *))->mgs_magical = 0; /* recalculate flags */
58f82c5c 236 break;
f9c6fee5 237 }
b77f7d40 238
f9c6fee5 239 /* recalculate flags if this entry was deleted. */
ff76feab 240 if (mg->mg_flags & MGf_GSKIP)
f9c6fee5 241 (SSPTR(mgs_ix, MGS *))->mgs_magical = 0;
a0d0e21e 242 }
ff76feab 243
f9c6fee5 244 mg = nextmg;
ff76feab 245
0723351e 246 if (have_new) {
ff76feab
AMS		 247 /* Have we finished with the new entries we saw? Start again
248 where we left off (unless there are more new entries). */
249 if (mg == head) {
0723351e 250 have_new = 0;
ff76feab
AMS		 251 mg = cur;
252 head = newmg;
253 }
254 }
255
256 /* Were any new entries added? */
0723351e
NC		 257 if (!have_new && (newmg = SvMAGIC(sv)) != head) {
258 have_new = 1;
ff76feab
AMS		 259 cur = mg;
260 mg = newmg;
f9c6fee5 261 (SSPTR(mgs_ix, MGS *))->mgs_magical = 0; /* recalculate flags */
760ac839 262 }
79072805 263 }
463ee0b2 264
8772537c 265 restore_magic(INT2PTR(void *, (IV)mgs_ix));
6683b158
NC		 266
267 if (SvREFCNT(sv) == 1) {
268 /* We hold the last reference to this SV, which implies that the
269 SV was deleted as a side effect of the routines we called. */
0c34ef67 270 SvOK_off(sv);
6683b158 271 }
79072805
LW		 272 return 0;
273}
274
954c1994
GS		 275/*
276=for apidoc mg_set
277
278Do magic after a value is assigned to the SV. See C<sv_magic>.
279
280=cut
281*/
282
79072805 283int
864dbfa3 284Perl_mg_set(pTHX_ SV *sv)
79072805 285{
97aff369 286 dVAR;
35a4481c 287 const I32 mgs_ix = SSNEW(sizeof(MGS));
79072805 288 MAGIC* mg;
463ee0b2
LW		 289 MAGIC* nextmg;
290
7918f24d
NC		 291 PERL_ARGS_ASSERT_MG_SET;
292
455ece5e 293 save_magic(mgs_ix, sv);
463ee0b2
LW		 294
295 for (mg = SvMAGIC(sv); mg; mg = nextmg) {
e1ec3a88 296 const MGVTBL* vtbl = mg->mg_virtual;
463ee0b2 297 nextmg = mg->mg_moremagic; /* it may delete itself */
a0d0e21e
LW		 298 if (mg->mg_flags & MGf_GSKIP) {
299 mg->mg_flags &= ~MGf_GSKIP; /* setting requires another read */
f9c6fee5 300 (SSPTR(mgs_ix, MGS*))->mgs_magical = 0;
a0d0e21e 301 }
e7cbf6c6
DM		 302 if (PL_localizing == 2 && !S_is_container_magic(mg))
303 continue;
2b260de0 304 if (vtbl && vtbl->svt_set)
fc0dc3b3 305 CALL_FPTR(vtbl->svt_set)(aTHX_ sv, mg);
79072805 306 }
463ee0b2 307
8772537c 308 restore_magic(INT2PTR(void*, (IV)mgs_ix));
79072805
LW		 309 return 0;
310}
311
954c1994
GS		 312/*
313=for apidoc mg_length
314
315Report on the SV's length. See C<sv_magic>.
316
317=cut
318*/
319
79072805 320U32
864dbfa3 321Perl_mg_length(pTHX_ SV *sv)
79072805 322{
97aff369 323 dVAR;
79072805 324 MAGIC* mg;
463ee0b2 325 STRLEN len;
463ee0b2 326
7918f24d
NC		 327 PERL_ARGS_ASSERT_MG_LENGTH;
328
79072805 329 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
35a4481c 330 const MGVTBL * const vtbl = mg->mg_virtual;
2b260de0 331 if (vtbl && vtbl->svt_len) {
35a4481c 332 const I32 mgs_ix = SSNEW(sizeof(MGS));
455ece5e 333 save_magic(mgs_ix, sv);
a0d0e21e 334 /* omit MGf_GSKIP -- not changed here */
fc0dc3b3 335 len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
8772537c 336 restore_magic(INT2PTR(void*, (IV)mgs_ix));
85e6fe83
LW		 337 return len;
338 }
339 }
340
d0644529
NC		 341 {
342 /* You can't know whether it's UTF-8 until you get the string again...
343 */
10516c54 344 const U8 *s = (U8*)SvPV_const(sv, len);
d0644529
NC		 345
346 if (DO_UTF8(sv)) {
347 len = utf8_length(s, s + len);
348 }
5636d518 349 }
463ee0b2 350 return len;
79072805
LW		 351}
352
8fb26106 353I32
864dbfa3 354Perl_mg_size(pTHX_ SV *sv)
93965878
NIS		 355{
356 MAGIC* mg;
ac27b0f5 357
7918f24d
NC		 358 PERL_ARGS_ASSERT_MG_SIZE;
359
93965878 360 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
35a4481c 361 const MGVTBL* const vtbl = mg->mg_virtual;
2b260de0 362 if (vtbl && vtbl->svt_len) {
35a4481c
AL		 363 const I32 mgs_ix = SSNEW(sizeof(MGS));
364 I32 len;
455ece5e 365 save_magic(mgs_ix, sv);
93965878 366 /* omit MGf_GSKIP -- not changed here */
fc0dc3b3 367 len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
8772537c 368 restore_magic(INT2PTR(void*, (IV)mgs_ix));
93965878
NIS		 369 return len;
370 }
371 }
372
373 switch(SvTYPE(sv)) {
374 case SVt_PVAV:
502c6561 375 return AvFILLp((const AV *) sv); /* Fallback to non-tied array */
93965878
NIS		 376 case SVt_PVHV:
377 /* FIXME */
378 default:
cea2e8a9 379 Perl_croak(aTHX_ "Size magic not implemented");
93965878
NIS		 380 break;
381 }
382 return 0;
383}
384
954c1994
GS		 385/*
386=for apidoc mg_clear
387
388Clear something magical that the SV represents. See C<sv_magic>.
389
390=cut
391*/
392
79072805 393int
864dbfa3 394Perl_mg_clear(pTHX_ SV *sv)
79072805 395{
35a4481c 396 const I32 mgs_ix = SSNEW(sizeof(MGS));
79072805 397 MAGIC* mg;
8ac77ac9 398 MAGIC *nextmg;
463ee0b2 399
7918f24d
NC		 400 PERL_ARGS_ASSERT_MG_CLEAR;
401
455ece5e 402 save_magic(mgs_ix, sv);
463ee0b2 403
8ac77ac9 404 for (mg = SvMAGIC(sv); mg; mg = nextmg) {
35a4481c 405 const MGVTBL* const vtbl = mg->mg_virtual;
a0d0e21e 406 /* omit GSKIP -- never set here */
727405f8 407
8ac77ac9
NC		 408 nextmg = mg->mg_moremagic; /* it may delete itself */
409
2b260de0 410 if (vtbl && vtbl->svt_clear)
fc0dc3b3 411 CALL_FPTR(vtbl->svt_clear)(aTHX_ sv, mg);
79072805 412 }
463ee0b2 413
8772537c 414 restore_magic(INT2PTR(void*, (IV)mgs_ix));
79072805
LW		 415 return 0;
416}
417
954c1994
GS		 418/*
419=for apidoc mg_find
420
421Finds the magic pointer for type matching the SV. See C<sv_magic>.
422
423=cut
424*/
425
93a17b20 426MAGIC*
35a4481c 427Perl_mg_find(pTHX_ const SV *sv, int type)
93a17b20 428{
96a5add6 429 PERL_UNUSED_CONTEXT;
35a4481c
AL		 430 if (sv) {
431 MAGIC *mg;
432 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
433 if (mg->mg_type == type)
434 return mg;
435 }
93a17b20 436 }
5f66b61c 437 return NULL;
93a17b20
LW		 438}
439
954c1994
GS		 440/*
441=for apidoc mg_copy
442
443Copies the magic from one SV to another. See C<sv_magic>.
444
445=cut
446*/
447
79072805 448int
864dbfa3 449Perl_mg_copy(pTHX_ SV *sv, SV *nsv, const char *key, I32 klen)
79072805 450{
463ee0b2 451 int count = 0;
79072805 452 MAGIC* mg;
7918f24d
NC		 453
454 PERL_ARGS_ASSERT_MG_COPY;
455
463ee0b2 456 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
35a4481c 457 const MGVTBL* const vtbl = mg->mg_virtual;
68795e93
NIS		 458 if ((mg->mg_flags & MGf_COPY) && vtbl->svt_copy){
459 count += CALL_FPTR(vtbl->svt_copy)(aTHX_ sv, mg, nsv, key, klen);
460 }
823a54a3
AL		 461 else {
462 const char type = mg->mg_type;
1e73acc8 463 if (isUPPER(type) && type != PERL_MAGIC_uvar) {
823a54a3
AL		 464 sv_magic(nsv,
465 (type == PERL_MAGIC_tied)
466 ? SvTIED_obj(sv, mg)
467 : (type == PERL_MAGIC_regdata && mg->mg_obj)
468 ? sv
469 : mg->mg_obj,
470 toLOWER(type), key, klen);
471 count++;
472 }
79072805 473 }
79072805 474 }
463ee0b2 475 return count;
79072805
LW		 476}
477
954c1994 478/*
0cbee0a4
DM		 479=for apidoc mg_localize
480
9711599e
CS		 481Copy some of the magic from an existing SV to new localized version of that
482SV. Container magic (eg %ENV, $1, tie) gets copied, value magic doesn't (eg
483taint, pos).
484
af7df257 485If setmagic is false then no set magic will be called on the new (empty) SV.
9711599e
CS		 486This typically means that assignment will soon follow (e.g. 'local $x = $y'),
487and that will handle the magic.
0cbee0a4
DM		 488
489=cut
490*/
491
492void
af7df257 493Perl_mg_localize(pTHX_ SV *sv, SV *nsv, bool setmagic)
0cbee0a4 494{
97aff369 495 dVAR;
0cbee0a4 496 MAGIC *mg;
7918f24d
NC		 497
498 PERL_ARGS_ASSERT_MG_LOCALIZE;
499
0cbee0a4 500 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
2b1b43ea 501 const MGVTBL* const vtbl = mg->mg_virtual;
2767dea0 502 if (!S_is_container_magic(mg))
0cbee0a4 503 continue;
0cbee0a4 504
a5063e7c
DM		 505 if ((mg->mg_flags & MGf_LOCAL) && vtbl->svt_local)
506 (void)CALL_FPTR(vtbl->svt_local)(aTHX_ nsv, mg);
507 else
0cbee0a4
DM		 508 sv_magicext(nsv, mg->mg_obj, mg->mg_type, vtbl,
509 mg->mg_ptr, mg->mg_len);
a5063e7c 510
0cbee0a4
DM		 511 /* container types should remain read-only across localization */
512 SvFLAGS(nsv) |= SvREADONLY(sv);
513 }
514
515 if (SvTYPE(nsv) >= SVt_PVMG && SvMAGIC(nsv)) {
516 SvFLAGS(nsv) |= SvMAGICAL(sv);
af7df257 517 if (setmagic) {
9711599e
CS		 518 PL_localizing = 1;
519 SvSETMAGIC(nsv);
520 PL_localizing = 0;
521 }
0cbee0a4
DM		 522 }
523}
524
525/*
954c1994
GS		 526=for apidoc mg_free
527
528Free any magic storage used by the SV. See C<sv_magic>.
529
530=cut
531*/
532
79072805 533int
864dbfa3 534Perl_mg_free(pTHX_ SV *sv)
79072805
LW		 535{
536 MAGIC* mg;
537 MAGIC* moremagic;
7918f24d
NC		 538
539 PERL_ARGS_ASSERT_MG_FREE;
540
79072805 541 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
35a4481c 542 const MGVTBL* const vtbl = mg->mg_virtual;
79072805 543 moremagic = mg->mg_moremagic;
2b260de0 544 if (vtbl && vtbl->svt_free)
fc0dc3b3 545 CALL_FPTR(vtbl->svt_free)(aTHX_ sv, mg);
14befaf4 546 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global) {
979acdb5 547 if (mg->mg_len > 0 || mg->mg_type == PERL_MAGIC_utf8)
88e89b8a 548 Safefree(mg->mg_ptr);
565764a8 549 else if (mg->mg_len == HEf_SVKEY)
ad64d0ec 550 SvREFCNT_dec(MUTABLE_SV(mg->mg_ptr));
d460ef45 551 }
b881518d
JH		 552 if (mg->mg_flags & MGf_REFCOUNTED)
553 SvREFCNT_dec(mg->mg_obj);
79072805 554 Safefree(mg);
c826f41b 555 SvMAGIC_set(sv, moremagic);
79072805 556 }
b162af07 557 SvMAGIC_set(sv, NULL);
68f8932e 558 SvMAGICAL_off(sv);
79072805
LW		 559 return 0;
560}
561
79072805 562#include <signal.h>
79072805 563
942e002e 564U32
864dbfa3 565Perl_magic_regdata_cnt(pTHX_ SV *sv, MAGIC *mg)
6cef1e77 566{
97aff369 567 dVAR;
8772537c 568 PERL_UNUSED_ARG(sv);
6cef1e77 569
7918f24d
NC		 570 PERL_ARGS_ASSERT_MAGIC_REGDATA_CNT;
571
0bd48802
AL		 572 if (PL_curpm) {
573 register const REGEXP * const rx = PM_GETRE(PL_curpm);
574 if (rx) {
a678b0e4
YO		 575 if (mg->mg_obj) { /* @+ */
576 /* return the number possible */
07bc277f 577 return RX_NPARENS(rx);
a678b0e4 578 } else { /* @- */
07bc277f 579 I32 paren = RX_LASTPAREN(rx);
a678b0e4
YO		 580
581 /* return the last filled */
f46c4081 582 while ( paren >= 0
07bc277f
NC		 583 && (RX_OFFS(rx)[paren].start == -1
584 || RX_OFFS(rx)[paren].end == -1) )
f46c4081 585 paren--;
a678b0e4
YO		 586 return (U32)paren;
587 }
0bd48802 588 }
8f580fb8 589 }
ac27b0f5 590
942e002e 591 return (U32)-1;
6cef1e77
IZ		 592}
593
594int
864dbfa3 595Perl_magic_regdatum_get(pTHX_ SV *sv, MAGIC *mg)
6cef1e77 596{
97aff369 597 dVAR;
7918f24d
NC		 598
599 PERL_ARGS_ASSERT_MAGIC_REGDATUM_GET;
600
0bd48802
AL		 601 if (PL_curpm) {
602 register const REGEXP * const rx = PM_GETRE(PL_curpm);
603 if (rx) {
604 register const I32 paren = mg->mg_len;
605 register I32 s;
606 register I32 t;
607 if (paren < 0)
608 return 0;
07bc277f
NC		 609 if (paren <= (I32)RX_NPARENS(rx) &&
610 (s = RX_OFFS(rx)[paren].start) != -1 &&
611 (t = RX_OFFS(rx)[paren].end) != -1)
0bd48802
AL		 612 {
613 register I32 i;
614 if (mg->mg_obj) /* @+ */
615 i = t;
616 else /* @- */
617 i = s;
618
619 if (i > 0 && RX_MATCH_UTF8(rx)) {
07bc277f 620 const char * const b = RX_SUBBEG(rx);
0bd48802 621 if (b)
f5a63d97 622 i = utf8_length((U8*)b, (U8*)(b+i));
0bd48802 623 }
727405f8 624
0bd48802 625 sv_setiv(sv, i);
1aa99e6b 626 }
0bd48802 627 }
6cef1e77
IZ		 628 }
629 return 0;
630}
631
e4b89193 632int
a29d06ed
MG		 633Perl_magic_regdatum_set(pTHX_ SV *sv, MAGIC *mg)
634{
7918f24d 635 PERL_ARGS_ASSERT_MAGIC_REGDATUM_SET;
d4c19fe8
AL		 636 PERL_UNUSED_ARG(sv);
637 PERL_UNUSED_ARG(mg);
6ad8f254 638 Perl_croak_no_modify(aTHX);
0dbb1585 639 NORETURN_FUNCTION_END;
a29d06ed
MG		 640}
641
93a17b20 642U32
864dbfa3 643Perl_magic_len(pTHX_ SV *sv, MAGIC *mg)
93a17b20 644{
97aff369 645 dVAR;
93a17b20 646 register I32 paren;
93a17b20 647 register I32 i;
2fdbfb4d
AB		 648 register const REGEXP * rx;
649 const char * const remaining = mg->mg_ptr + 1;
93a17b20 650
7918f24d
NC		 651 PERL_ARGS_ASSERT_MAGIC_LEN;
652
93a17b20 653 switch (*mg->mg_ptr) {
2fdbfb4d
AB		 654 case '\020':
655 if (*remaining == '\0') { /* ^P */
656 break;
657 } else if (strEQ(remaining, "REMATCH")) { /* $^PREMATCH */
658 goto do_prematch;
659 } else if (strEQ(remaining, "OSTMATCH")) { /* $^POSTMATCH */
660 goto do_postmatch;
661 }
662 break;
663 case '\015': /* $^MATCH */
664 if (strEQ(remaining, "ATCH")) {
665 goto do_match;
666 } else {
667 break;
668 }
669 case '`':
670 do_prematch:
f1b875a0 671 paren = RX_BUFF_IDX_PREMATCH;
2fdbfb4d
AB		 672 goto maybegetparen;
673 case '\'':
674 do_postmatch:
f1b875a0 675 paren = RX_BUFF_IDX_POSTMATCH;
2fdbfb4d
AB		 676 goto maybegetparen;
677 case '&':
678 do_match:
f1b875a0 679 paren = RX_BUFF_IDX_FULLMATCH;
2fdbfb4d 680 goto maybegetparen;
93a17b20 681 case '1': case '2': case '3': case '4':
2fdbfb4d
AB		 682 case '5': case '6': case '7': case '8': case '9':
683 paren = atoi(mg->mg_ptr);
684 maybegetparen:
aaa362c4 685 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
2fdbfb4d
AB		 686 getparen:
687 i = CALLREG_NUMBUF_LENGTH((REGEXP * const)rx, sv, paren);
cf93c79d 688
ffc61ed2 689 if (i < 0)
0844c848 690 Perl_croak(aTHX_ "panic: magic_len: %"IVdf, (IV)i);
ffc61ed2 691 return i;
2fdbfb4d 692 } else {
235bddc8 693 if (ckWARN(WARN_UNINITIALIZED))
29489e7c 694 report_uninit(sv);
2fdbfb4d 695 return 0;
93a17b20 696 }
93a17b20 697 case '+':
aaa362c4 698 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
07bc277f 699 paren = RX_LASTPAREN(rx);
13f57bf8
CS		 700 if (paren)
701 goto getparen;
93a17b20 702 }
748a9306 703 return 0;
a01268b5
JH		 704 case '\016': /* ^N */
705 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
07bc277f 706 paren = RX_LASTCLOSEPAREN(rx);
a01268b5
JH		 707 if (paren)
708 goto getparen;
709 }
710 return 0;
93a17b20
LW		 711 }
712 magic_get(sv,mg);
2d8e6c8d 713 if (!SvPOK(sv) && SvNIOK(sv)) {
8b6b16e7 714 sv_2pv(sv, 0);
2d8e6c8d 715 }
93a17b20
LW		 716 if (SvPOK(sv))
717 return SvCUR(sv);
718 return 0;
719}
720
ad3296c6 721#define SvRTRIM(sv) STMT_START { \
eae92ea0
GA		 722 if (SvPOK(sv)) { \
723 STRLEN len = SvCUR(sv); \
724 char * const p = SvPVX(sv); \
8e6b4db6
PC		 725 while (len > 0 && isSPACE(p[len-1])) \
726 --len; \
727 SvCUR_set(sv, len); \
728 p[len] = '\0'; \
729 } \
ad3296c6
SH		 730} STMT_END
731
8b850bd5
NC		 732void
733Perl_emulate_cop_io(pTHX_ const COP *const c, SV *const sv)
734{
7918f24d
NC		 735 PERL_ARGS_ASSERT_EMULATE_COP_IO;
736
8b850bd5
NC		 737 if (!(CopHINTS_get(c) & (HINT_LEXICAL_IO_IN|HINT_LEXICAL_IO_OUT)))
738 sv_setsv(sv, &PL_sv_undef);
739 else {
740 sv_setpvs(sv, "");
741 SvUTF8_off(sv);
742 if ((CopHINTS_get(c) & HINT_LEXICAL_IO_IN)) {
743 SV *const value = Perl_refcounted_he_fetch(aTHX_
744 c->cop_hints_hash,
745 0, "open<", 5, 0, 0);
746 assert(value);
747 sv_catsv(sv, value);
748 }
749 sv_catpvs(sv, "\0");
750 if ((CopHINTS_get(c) & HINT_LEXICAL_IO_OUT)) {
751 SV *const value = Perl_refcounted_he_fetch(aTHX_
752 c->cop_hints_hash,
753 0, "open>", 5, 0, 0);
754 assert(value);
755 sv_catsv(sv, value);
756 }
757 }
758}
759
79072805 760int
864dbfa3 761Perl_magic_get(pTHX_ SV *sv, MAGIC *mg)
79072805 762{
27da23d5 763 dVAR;
79072805 764 register I32 paren;
35272f84 765 register char *s = NULL;
d9f97599 766 register REGEXP *rx;
823a54a3
AL		 767 const char * const remaining = mg->mg_ptr + 1;
768 const char nextchar = *remaining;
79072805 769
7918f24d
NC		 770 PERL_ARGS_ASSERT_MAGIC_GET;
771
79072805 772 switch (*mg->mg_ptr) {
748a9306 773 case '\001': /* ^A */
3280af22 774 sv_setsv(sv, PL_bodytarget);
748a9306 775 break;
e5218da5 776 case '\003': /* ^C, ^CHILD_ERROR_NATIVE */
823a54a3 777 if (nextchar == '\0') {
e5218da5
GA		 778 sv_setiv(sv, (IV)PL_minus_c);
779 }
823a54a3 780 else if (strEQ(remaining, "HILD_ERROR_NATIVE")) {
e5218da5
GA		 781 sv_setiv(sv, (IV)STATUS_NATIVE);
782 }
49460fe6
NIS		 783 break;
784
79072805 785 case '\004': /* ^D */
aea4f609 786 sv_setiv(sv, (IV)(PL_debug & DEBUG_MASK));
79072805 787 break;
28f23441 788 case '\005': /* ^E */
823a54a3 789 if (nextchar == '\0') {
e37778c2 790#if defined(VMS)
0a378802
JH		 791 {
792# include <descrip.h>
793# include <starlet.h>
794 char msg[255];
795 $DESCRIPTOR(msgdsc,msg);
796 sv_setnv(sv,(NV) vaxc$errno);
797 if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1)
798 sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length);
799 else
76f68e9b 800 sv_setpvs(sv,"");
0a378802 801 }
4b645107 802#elif defined(OS2)
0a378802
JH		 803 if (!(_emx_env & 0x200)) { /* Under DOS */
804 sv_setnv(sv, (NV)errno);
805 sv_setpv(sv, errno ? Strerror(errno) : "");
806 } else {
807 if (errno != errno_isOS2) {
823a54a3 808 const int tmp = _syserrno();
0a378802
JH		 809 if (tmp) /* 2nd call to _syserrno() makes it 0 */
810 Perl_rc = tmp;
811 }
812 sv_setnv(sv, (NV)Perl_rc);
813 sv_setpv(sv, os2error(Perl_rc));
814 }
4b645107 815#elif defined(WIN32)
0a378802 816 {
d4c19fe8 817 const DWORD dwErr = GetLastError();
0a378802 818 sv_setnv(sv, (NV)dwErr);
823a54a3 819 if (dwErr) {
0a378802
JH		 820 PerlProc_GetOSError(sv, dwErr);
821 }
822 else
76f68e9b 823 sv_setpvs(sv, "");
0a378802
JH		 824 SetLastError(dwErr);
825 }
22fae026 826#else
f6c8f21d 827 {
4ee39169 828 dSAVE_ERRNO;
f6c8f21d 829 sv_setnv(sv, (NV)errno);
666ea192 830 sv_setpv(sv, errno ? Strerror(errno) : "");
4ee39169 831 RESTORE_ERRNO;
f6c8f21d 832 }
28f23441 833#endif
ad3296c6 834 SvRTRIM(sv);
0a378802
JH		 835 SvNOK_on(sv); /* what a wonderful hack! */
836 }
823a54a3 837 else if (strEQ(remaining, "NCODING"))
0a378802
JH		 838 sv_setsv(sv, PL_encoding);
839 break;
79072805 840 case '\006': /* ^F */
3280af22 841 sv_setiv(sv, (IV)PL_maxsysfd);
79072805 842 break;
a0d0e21e 843 case '\010': /* ^H */
3280af22 844 sv_setiv(sv, (IV)PL_hints);
a0d0e21e 845 break;
9d116dd7 846 case '\011': /* ^I */ /* NOT \t in EBCDIC */
120f7abe 847 sv_setpv(sv, PL_inplace); /* Will undefine sv if PL_inplace is NULL */
79072805 848 break;
ac27b0f5 849 case '\017': /* ^O & ^OPEN */
823a54a3 850 if (nextchar == '\0') {
ac27b0f5 851 sv_setpv(sv, PL_osname);
3511154c
DM		 852 SvTAINTED_off(sv);
853 }
823a54a3 854 else if (strEQ(remaining, "PEN")) {
8b850bd5 855 Perl_emulate_cop_io(aTHX_ &PL_compiling, sv);
ac27b0f5 856 }
28f23441 857 break;
cde0cee5
YO		 858 case '\020':
859 if (nextchar == '\0') { /* ^P */
860 sv_setiv(sv, (IV)PL_perldb);
861 } else if (strEQ(remaining, "REMATCH")) { /* $^PREMATCH */
862 goto do_prematch_fetch;
863 } else if (strEQ(remaining, "OSTMATCH")) { /* $^POSTMATCH */
864 goto do_postmatch_fetch;
865 }
79072805 866 break;
fb73857a 867 case '\023': /* ^S */
823a54a3 868 if (nextchar == '\0') {
bc177e6b 869 if (PL_parser && PL_parser->lex_state != LEX_NOTPARSING)
0c34ef67 870 SvOK_off(sv);
3280af22 871 else if (PL_in_eval)
6dc8a9e4 872 sv_setiv(sv, PL_in_eval & ~(EVAL_INREQUIRE));
a4268c0a
AMS		 873 else
874 sv_setiv(sv, 0);
d58bf5aa 875 }
fb73857a 876 break;
79072805 877 case '\024': /* ^T */
823a54a3 878 if (nextchar == '\0') {
88e89b8a 879#ifdef BIG_TIME
7c36658b 880 sv_setnv(sv, PL_basetime);
88e89b8a 881#else
7c36658b 882 sv_setiv(sv, (IV)PL_basetime);
88e89b8a 883#endif
7c36658b 884 }
823a54a3 885 else if (strEQ(remaining, "AINT"))
9aa05f58
RGS		 886 sv_setiv(sv, PL_tainting
887 ? (PL_taint_warn || PL_unsafe ? -1 : 1)
888 : 0);
7c36658b 889 break;
e07ea26a 890 case '\025': /* $^UNICODE, $^UTF8LOCALE, $^UTF8CACHE */
823a54a3 891 if (strEQ(remaining, "NICODE"))
a05d7ebb 892 sv_setuv(sv, (UV) PL_unicode);
823a54a3 893 else if (strEQ(remaining, "TF8LOCALE"))
7cebcbc0 894 sv_setuv(sv, (UV) PL_utf8locale);
e07ea26a
NC		 895 else if (strEQ(remaining, "TF8CACHE"))
896 sv_setiv(sv, (IV) PL_utf8cache);
fde18df1
JH		 897 break;
898 case '\027': /* ^W & $^WARNING_BITS */
823a54a3 899 if (nextchar == '\0')
4438c4b7 900 sv_setiv(sv, (IV)((PL_dowarn & G_WARN_ON) ? TRUE : FALSE));
823a54a3 901 else if (strEQ(remaining, "ARNING_BITS")) {
013b78e8 902 if (PL_compiling.cop_warnings == pWARN_NONE) {
4438c4b7 903 sv_setpvn(sv, WARN_NONEstring, WARNsize) ;
013b78e8
RGS		 904 }
905 else if (PL_compiling.cop_warnings == pWARN_STD) {
666ea192
JH		 906 sv_setpvn(
907 sv,
908 (PL_dowarn & G_WARN_ON) ? WARN_ALLstring : WARN_NONEstring,
909 WARNsize
910 );
013b78e8 911 }
d3a7d8c7 912 else if (PL_compiling.cop_warnings == pWARN_ALL) {
75b6c4ca
RGS		 913 /* Get the bit mask for $warnings::Bits{all}, because
914 * it could have been extended by warnings::register */
6673a63c 915 HV * const bits=get_hv("warnings::Bits", 0);
f5a63d97
AL		 916 if (bits) {
917 SV ** const bits_all = hv_fetchs(bits, "all", FALSE);
918 if (bits_all)
919 sv_setsv(sv, *bits_all);
75b6c4ca
RGS		 920 }
921 else {
922 sv_setpvn(sv, WARN_ALLstring, WARNsize) ;
923 }
ac27b0f5 924 }
4438c4b7 925 else {
72dc9ed5
NC		 926 sv_setpvn(sv, (char *) (PL_compiling.cop_warnings + 1),
927 *PL_compiling.cop_warnings);
ac27b0f5 928 }
d3a7d8c7 929 SvPOK_only(sv);
4438c4b7 930 }
79072805 931 break;
cde0cee5
YO		 932 case '\015': /* $^MATCH */
933 if (strEQ(remaining, "ATCH")) {
79072805
LW		 934 case '1': case '2': case '3': case '4':
935 case '5': case '6': case '7': case '8': case '9': case '&':
cde0cee5
YO		 936 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
937 /*
159b6efe 938 * Pre-threads, this was paren = atoi(GvENAME((const GV *)mg->mg_obj));
cde0cee5
YO		 939 * XXX Does the new way break anything?
940 */
941 paren = atoi(mg->mg_ptr); /* $& is in [0] */
2fdbfb4d 942 CALLREG_NUMBUF_FETCH(rx,paren,sv);
cde0cee5
YO		 943 break;
944 }
945 sv_setsv(sv,&PL_sv_undef);
79072805
LW		 946 }
947 break;
948 case '+':
aaa362c4 949 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
07bc277f
NC		 950 if (RX_LASTPAREN(rx)) {
951 CALLREG_NUMBUF_FETCH(rx,RX_LASTPAREN(rx),sv);
44a2ac75
YO		 952 break;
953 }
79072805 954 }
3280af22 955 sv_setsv(sv,&PL_sv_undef);
79072805 956 break;
a01268b5
JH		 957 case '\016': /* ^N */
958 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
07bc277f
NC		 959 if (RX_LASTCLOSEPAREN(rx)) {
960 CALLREG_NUMBUF_FETCH(rx,RX_LASTCLOSEPAREN(rx),sv);
44a2ac75
YO		 961 break;
962 }
963
a01268b5
JH		 964 }
965 sv_setsv(sv,&PL_sv_undef);
966 break;
79072805 967 case '`':
cde0cee5 968 do_prematch_fetch:
aaa362c4 969 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
2fdbfb4d 970 CALLREG_NUMBUF_FETCH(rx,-2,sv);
93b32b6d 971 break;
79072805 972 }
3280af22 973 sv_setsv(sv,&PL_sv_undef);
79072805
LW		 974 break;
975 case '\'':
cde0cee5 976 do_postmatch_fetch:
aaa362c4 977 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
2fdbfb4d 978 CALLREG_NUMBUF_FETCH(rx,-1,sv);
93b32b6d 979 break;
79072805 980 }
3280af22 981 sv_setsv(sv,&PL_sv_undef);
79072805
LW		 982 break;
983 case '.':
3280af22 984 if (GvIO(PL_last_in_gv)) {
357c8808 985 sv_setiv(sv, (IV)IoLINES(GvIOp(PL_last_in_gv)));
79072805 986 }
79072805
LW		 987 break;
988 case '?':
809a5acc 989 {
809a5acc 990 sv_setiv(sv, (IV)STATUS_CURRENT);
ff0cee69 991#ifdef COMPLEX_STATUS
41cb7b2b 992 SvUPGRADE(sv, SVt_PVLV);
6b88bc9c
GS		 993 LvTARGOFF(sv) = PL_statusvalue;
994 LvTARGLEN(sv) = PL_statusvalue_vms;
ff0cee69 995#endif
809a5acc 996 }
79072805
LW		 997 break;
998 case '^':
099be4f1
DM		 999 if (!isGV_with_GP(PL_defoutgv))
1000 s = "";
1001 else if (GvIOp(PL_defoutgv))
1002 s = IoTOP_NAME(GvIOp(PL_defoutgv));
79072805
LW		 1003 if (s)
1004 sv_setpv(sv,s);
1005 else {
3280af22 1006 sv_setpv(sv,GvENAME(PL_defoutgv));
cb421d5e 1007 sv_catpvs(sv,"_TOP");
79072805
LW		 1008 }
1009 break;
1010 case '~':
099be4f1
DM		 1011 if (!isGV_with_GP(PL_defoutgv))
1012 s = "";
1013 else if (GvIOp(PL_defoutgv))
0daa599b 1014 s = IoFMT_NAME(GvIOp(PL_defoutgv));
79072805 1015 if (!s)
3280af22 1016 s = GvENAME(PL_defoutgv);
79072805
LW		 1017 sv_setpv(sv,s);
1018 break;
79072805 1019 case '=':
099be4f1 1020 if (GvIO(PL_defoutgv))
0daa599b 1021 sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv)));
79072805
LW		 1022 break;
1023 case '-':
099be4f1 1024 if (GvIO(PL_defoutgv))
0daa599b 1025 sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv)));
79072805
LW		 1026 break;
1027 case '%':
099be4f1 1028 if (GvIO(PL_defoutgv))
0daa599b 1029 sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv)));
79072805 1030 break;
79072805
LW		 1031 case ':':
1032 break;
1033 case '/':
1034 break;
1035 case '[':
11206fdd 1036 sv_setiv(sv, (IV)CopARYBASE_get(PL_curcop));
79072805
LW		 1037 break;
1038 case '|':
099be4f1 1039 if (GvIO(PL_defoutgv))
0daa599b 1040 sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 );
79072805 1041 break;
79072805 1042 case '\\':
b2ce0fda 1043 if (PL_ors_sv)
f28098ff 1044 sv_copypv(sv, PL_ors_sv);
79072805 1045 break;
79072805 1046 case '!':
666d8aa2
CB		 1047 {
1048 dSAVE_ERRNO;
a5f75d66 1049#ifdef VMS
65202027 1050 sv_setnv(sv, (NV)((errno == EVMSERR) ? vaxc$errno : errno));
a5f75d66 1051#else
65202027 1052 sv_setnv(sv, (NV)errno);
666d8aa2 1053#endif
88e89b8a 1054#ifdef OS2
ed344e4f
IZ		 1055 if (errno == errno_isOS2 || errno == errno_isOS2_set)
1056 sv_setpv(sv, os2error(Perl_rc));
88e89b8a 1057 else
a5f75d66 1058#endif
666ea192 1059 sv_setpv(sv, errno ? Strerror(errno) : "");
be1cf43c
NC		 1060 if (SvPOKp(sv))
1061 SvPOK_on(sv); /* may have got removed during taint processing */
4ee39169 1062 RESTORE_ERRNO;
88e89b8a 1063 }
666d8aa2 1064
ad3296c6 1065 SvRTRIM(sv);
946ec16e 1066 SvNOK_on(sv); /* what a wonderful hack! */
79072805
LW		 1067 break;
1068 case '<':
3280af22 1069 sv_setiv(sv, (IV)PL_uid);
79072805
LW		 1070 break;
1071 case '>':
3280af22 1072 sv_setiv(sv, (IV)PL_euid);
79072805
LW		 1073 break;
1074 case '(':
3280af22 1075 sv_setiv(sv, (IV)PL_gid);
79072805
LW		 1076 goto add_groups;
1077 case ')':
3280af22 1078 sv_setiv(sv, (IV)PL_egid);
79072805 1079 add_groups:
79072805 1080#ifdef HAS_GETGROUPS
79072805 1081 {
57d7c65e 1082 Groups_t *gary = NULL;
fb45abb2 1083 I32 i, num_groups = getgroups(0, gary);
57d7c65e
JC		 1084 Newx(gary, num_groups, Groups_t);
1085 num_groups = getgroups(num_groups, gary);
fb45abb2
GA		 1086 for (i = 0; i < num_groups; i++)
1087 Perl_sv_catpvf(aTHX_ sv, " %"IVdf, (IV)gary[i]);
57d7c65e 1088 Safefree(gary);
79072805 1089 }
155aba94 1090 (void)SvIOK_on(sv); /* what a wonderful hack! */
cd70abae 1091#endif
79072805 1092 break;
79072805
LW		 1093 case '0':
1094 break;
1095 }
a0d0e21e 1096 return 0;
79072805
LW		 1097}
1098
1099int
864dbfa3 1100Perl_magic_getuvar(pTHX_ SV *sv, MAGIC *mg)
79072805 1101{
8772537c 1102 struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr;
79072805 1103
7918f24d
NC		 1104 PERL_ARGS_ASSERT_MAGIC_GETUVAR;
1105
79072805 1106 if (uf && uf->uf_val)
24f81a43 1107 (*uf->uf_val)(aTHX_ uf->uf_index, sv);
79072805
LW		 1108 return 0;
1109}
1110
1111int
864dbfa3 1112Perl_magic_setenv(pTHX_ SV *sv, MAGIC *mg)
79072805 1113{
27da23d5 1114 dVAR;
9ae3433d 1115 STRLEN len = 0, klen;
666ea192 1116 const char *s = SvOK(sv) ? SvPV_const(sv,len) : "";
fabdb6c0 1117 const char * const ptr = MgPV_const(mg,klen);
88e89b8a 1118 my_setenv(ptr, s);
1e422769 1119
7918f24d
NC		 1120 PERL_ARGS_ASSERT_MAGIC_SETENV;
1121
a0d0e21e
LW		 1122#ifdef DYNAMIC_ENV_FETCH
1123 /* We just undefd an environment var. Is a replacement */
1124 /* waiting in the wings? */
1125 if (!len) {
fabdb6c0
AL		 1126 SV ** const valp = hv_fetch(GvHVn(PL_envgv), ptr, klen, FALSE);
1127 if (valp)
4ab59fcc 1128 s = SvOK(*valp) ? SvPV_const(*valp, len) : "";
a0d0e21e
LW		 1129 }
1130#endif
1e422769 1131
39e571d4 1132#if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS)
79072805
LW		 1133 /* And you'll never guess what the dog had */
1134 /* in its mouth... */
3280af22 1135 if (PL_tainting) {
1e422769 1136 MgTAINTEDDIR_off(mg);
1137#ifdef VMS
5aabfad6 1138 if (s && klen == 8 && strEQ(ptr, "DCL$PATH")) {
b8ffc8df 1139 char pathbuf[256], eltbuf[256], *cp, *elt;
c623ac67 1140 Stat_t sbuf;
1e422769 1141 int i = 0, j = 0;
1142
6fca0082 1143 my_strlcpy(eltbuf, s, sizeof(eltbuf));
b8ffc8df 1144 elt = eltbuf;
1e422769 1145 do { /* DCL$PATH may be a search list */
1146 while (1) { /* as may dev portion of any element */
1147 if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) {
1148 if ( *(cp+1) == '.' || *(cp+1) == '-' ||
1149 cando_by_name(S_IWUSR,0,elt) ) {
1150 MgTAINTEDDIR_on(mg);
1151 return 0;
1152 }
1153 }
bd61b366 1154 if ((cp = strchr(elt, ':')) != NULL)
1e422769 1155 *cp = '\0';
1156 if (my_trnlnm(elt, eltbuf, j++))
1157 elt = eltbuf;
1158 else
1159 break;
1160 }
1161 j = 0;
1162 } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf));
1163 }
1164#endif /* VMS */
5aabfad6 1165 if (s && klen == 4 && strEQ(ptr,"PATH")) {
8772537c 1166 const char * const strend = s + len;
463ee0b2
LW		 1167
1168 while (s < strend) {
96827780 1169 char tmpbuf[256];
c623ac67 1170 Stat_t st;
5f74f29c 1171 I32 i;
f5a63d97
AL		 1172#ifdef VMS /* Hmm. How do we get $Config{path_sep} from C? */
1173 const char path_sep = '|';
1174#else
1175 const char path_sep = ':';
1176#endif
96827780 1177 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
427eaa01 1178 s, strend, path_sep, &i);
463ee0b2 1179 s++;
bb7a0f54 1180 if (i >= (I32)sizeof tmpbuf /* too long -- assume the worst */
326b5008
CB		 1181#ifdef VMS
1182 || !strchr(tmpbuf, ':') /* no colon thus no device name -- assume relative path */
1183#else
1184 || *tmpbuf != '/' /* no starting slash -- assume relative path */
1185#endif
c6ed36e1 1186 || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
8990e307 1187 MgTAINTEDDIR_on(mg);
1e422769 1188 return 0;
1189 }
463ee0b2 1190 }
79072805
LW		 1191 }
1192 }
39e571d4 1193#endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */
1e422769 1194
79072805
LW		 1195 return 0;
1196}
1197
1198int
864dbfa3 1199Perl_magic_clearenv(pTHX_ SV *sv, MAGIC *mg)
85e6fe83 1200{
7918f24d 1201 PERL_ARGS_ASSERT_MAGIC_CLEARENV;
8772537c 1202 PERL_UNUSED_ARG(sv);
bd61b366 1203 my_setenv(MgPV_nolen_const(mg),NULL);
85e6fe83
LW		 1204 return 0;
1205}
1206
88e89b8a 1207int
864dbfa3 1208Perl_magic_set_all_env(pTHX_ SV *sv, MAGIC *mg)
fb73857a 1209{
97aff369 1210 dVAR;
7918f24d 1211 PERL_ARGS_ASSERT_MAGIC_SET_ALL_ENV;
65e66c80 1212 PERL_UNUSED_ARG(mg);
b0269e46 1213#if defined(VMS)
cea2e8a9 1214 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
fb73857a 1215#else
3280af22 1216 if (PL_localizing) {
fb73857a 1217 HE* entry;
b0269e46 1218 my_clearenv();
85fbaab2
NC		 1219 hv_iterinit(MUTABLE_HV(sv));
1220 while ((entry = hv_iternext(MUTABLE_HV(sv)))) {
fb73857a 1221 I32 keylen;
1222 my_setenv(hv_iterkey(entry, &keylen),
85fbaab2 1223 SvPV_nolen_const(hv_iterval(MUTABLE_HV(sv), entry)));
fb73857a 1224 }
1225 }
1226#endif
1227 return 0;
1228}
1229
1230int
864dbfa3 1231Perl_magic_clear_all_env(pTHX_ SV *sv, MAGIC *mg)
66b1d557 1232{
27da23d5 1233 dVAR;
7918f24d 1234 PERL_ARGS_ASSERT_MAGIC_CLEAR_ALL_ENV;
8772537c
AL		 1235 PERL_UNUSED_ARG(sv);
1236 PERL_UNUSED_ARG(mg);
b0269e46
AB		 1237#if defined(VMS)
1238 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
1239#else
1240 my_clearenv();
1241#endif
3e3baf6d 1242 return 0;
66b1d557
HM		 1243}
1244
64ca3a65 1245#ifndef PERL_MICRO
2d4fcd5e
AJ		 1246#ifdef HAS_SIGPROCMASK
1247static void
1248restore_sigmask(pTHX_ SV *save_sv)
1249{
0bd48802 1250 const sigset_t * const ossetp = (const sigset_t *) SvPV_nolen_const( save_sv );
f5a63d97 1251 (void)sigprocmask(SIG_SETMASK, ossetp, NULL);
2d4fcd5e
AJ		 1252}
1253#endif
66b1d557 1254int
864dbfa3 1255Perl_magic_getsig(pTHX_ SV *sv, MAGIC *mg)
88e89b8a 1256{
97aff369 1257 dVAR;
88e89b8a 1258 /* Are we fetching a signal entry? */
708854f2 1259 int i = (I16)mg->mg_private;
7918f24d
NC		 1260
1261 PERL_ARGS_ASSERT_MAGIC_GETSIG;
1262
708854f2
NC		 1263 if (!i) {
1264 mg->mg_private = i = whichsig(MgPV_nolen_const(mg));
1265 }
1266
e02bfb16 1267 if (i > 0) {
22c35a8c
GS		 1268 if(PL_psig_ptr[i])
1269 sv_setsv(sv,PL_psig_ptr[i]);
88e89b8a 1270 else {
46da273f 1271 Sighandler_t sigstate = rsignal_state(i);
23ada85b 1272#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
46da273f
AL		 1273 if (PL_sig_handlers_initted && PL_sig_ignoring[i])
1274 sigstate = SIG_IGN;
2e34cc90
CL		 1275#endif
1276#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
46da273f
AL		 1277 if (PL_sig_handlers_initted && PL_sig_defaulting[i])
1278 sigstate = SIG_DFL;
85b332e2 1279#endif
88e89b8a 1280 /* cache state so we don't fetch it again */
8aad04aa 1281 if(sigstate == (Sighandler_t) SIG_IGN)
6502358f 1282 sv_setpvs(sv,"IGNORE");
88e89b8a 1283 else
3280af22 1284 sv_setsv(sv,&PL_sv_undef);
46da273f 1285 PL_psig_ptr[i] = SvREFCNT_inc_simple_NN(sv);
88e89b8a 1286 SvTEMP_off(sv);
1287 }
1288 }
1289 return 0;
1290}
1291int
864dbfa3 1292Perl_magic_clearsig(pTHX_ SV *sv, MAGIC *mg)
88e89b8a 1293{
7918f24d 1294 PERL_ARGS_ASSERT_MAGIC_CLEARSIG;
8772537c 1295 PERL_UNUSED_ARG(sv);
179c85a2 1296
38a124f0 1297 magic_setsig(NULL, mg);
179c85a2 1298 return sv_unmagic(sv, mg->mg_type);
88e89b8a 1299}
3d37d572 1300
0a8e0eff 1301Signal_t
8aad04aa 1302#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
b6455c53 1303Perl_csighandler(int sig, siginfo_t *sip PERL_UNUSED_DECL, void *uap PERL_UNUSED_DECL)
8aad04aa 1304#else
0a8e0eff 1305Perl_csighandler(int sig)
8aad04aa 1306#endif
0a8e0eff 1307{
1018e26f
NIS		 1308#ifdef PERL_GET_SIG_CONTEXT
1309 dTHXa(PERL_GET_SIG_CONTEXT);
1310#else
85b332e2
CL		 1311 dTHX;
1312#endif
23ada85b 1313#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
5c1546dc 1314 (void) rsignal(sig, PL_csighandlerp);
27da23d5 1315 if (PL_sig_ignoring[sig]) return;
85b332e2 1316#endif
2e34cc90 1317#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
27da23d5 1318 if (PL_sig_defaulting[sig])
2e34cc90
CL		 1319#ifdef KILL_BY_SIGPRC
1320 exit((Perl_sig_to_vmscondition(sig)&STS$M_COND_ID)|STS$K_SEVERE|STS$M_INHIB_MSG);
1321#else
1322 exit(1);
1323#endif
1324#endif
406878dd 1325 if (
853d2c32
RGS		 1326#ifdef SIGILL
1327 sig == SIGILL ||
1328#endif
1329#ifdef SIGBUS
1330 sig == SIGBUS ||
1331#endif
1332#ifdef SIGSEGV
1333 sig == SIGSEGV ||
1334#endif
1335 (PL_signals & PERL_SIGNALS_UNSAFE_FLAG))
4ffa73a3 1336 /* Call the perl level handler now--
31c91b43 1337 * with risk we may be in malloc() or being destructed etc. */
6e324d09 1338#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
80626cf1 1339 (*PL_sighandlerp)(sig, NULL, NULL);
6e324d09
CB		 1340#else
1341 (*PL_sighandlerp)(sig);
92807b6d 1342#endif
406878dd 1343 else {
31c91b43 1344 if (!PL_psig_pend) return;
406878dd
GA		 1345 /* Set a flag to say this signal is pending, that is awaiting delivery after
1346 * the current Perl opcode completes */
1347 PL_psig_pend[sig]++;
1348
1349#ifndef SIG_PENDING_DIE_COUNT
1350# define SIG_PENDING_DIE_COUNT 120
1351#endif
fe13d51d 1352 /* Add one to say _a_ signal is pending */
406878dd
GA		 1353 if (++PL_sig_pending >= SIG_PENDING_DIE_COUNT)
1354 Perl_croak(aTHX_ "Maximal count of pending signals (%lu) exceeded",
1355 (unsigned long)SIG_PENDING_DIE_COUNT);
1356 }
0a8e0eff
NIS		 1357}
1358
2e34cc90
CL		 1359#if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1360void
1361Perl_csighandler_init(void)
1362{
1363 int sig;
27da23d5 1364 if (PL_sig_handlers_initted) return;
2e34cc90
CL		 1365
1366 for (sig = 1; sig < SIG_SIZE; sig++) {
1367#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
218fdd94 1368 dTHX;
27da23d5 1369 PL_sig_defaulting[sig] = 1;
5c1546dc 1370 (void) rsignal(sig, PL_csighandlerp);
2e34cc90
CL		 1371#endif
1372#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
27da23d5 1373 PL_sig_ignoring[sig] = 0;
2e34cc90
CL		 1374#endif
1375 }
27da23d5 1376 PL_sig_handlers_initted = 1;
2e34cc90
CL		 1377}
1378#endif
1379
0a8e0eff
NIS		 1380void
1381Perl_despatch_signals(pTHX)
1382{
97aff369 1383 dVAR;
0a8e0eff
NIS		 1384 int sig;
1385 PL_sig_pending = 0;
1386 for (sig = 1; sig < SIG_SIZE; sig++) {
1387 if (PL_psig_pend[sig]) {
d0166017 1388 dSAVE_ERRNO;
25da4428
JH		 1389 PERL_BLOCKSIG_ADD(set, sig);
1390 PL_psig_pend[sig] = 0;
1391 PERL_BLOCKSIG_BLOCK(set);
6e324d09 1392#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
80626cf1 1393 (*PL_sighandlerp)(sig, NULL, NULL);
6e324d09
CB		 1394#else
1395 (*PL_sighandlerp)(sig);
92807b6d 1396#endif
25da4428 1397 PERL_BLOCKSIG_UNBLOCK(set);
d0166017 1398 RESTORE_ERRNO;
0a8e0eff
NIS		 1399 }
1400 }
1401}
1402
38a124f0 1403/* sv of NULL signifies that we're acting as magic_clearsig. */
85e6fe83 1404int
864dbfa3 1405Perl_magic_setsig(pTHX_ SV *sv, MAGIC *mg)
79072805 1406{
27da23d5 1407 dVAR;
79072805 1408 I32 i;
cbbf8932 1409 SV** svp = NULL;
2d4fcd5e
AJ		 1410 /* Need to be careful with SvREFCNT_dec(), because that can have side
1411 * effects (due to closures). We must make sure that the new disposition
1412 * is in place before it is called.
1413 */
cbbf8932 1414 SV* to_dec = NULL;
e72dc28c 1415 STRLEN len;
2d4fcd5e
AJ		 1416#ifdef HAS_SIGPROCMASK
1417 sigset_t set, save;
1418 SV* save_sv;
1419#endif
d5263905 1420 register const char *s = MgPV_const(mg,len);
7918f24d
NC		 1421
1422 PERL_ARGS_ASSERT_MAGIC_SETSIG;
1423
748a9306
LW		 1424 if (*s == '_') {
1425 if (strEQ(s,"__DIE__"))
3280af22 1426 svp = &PL_diehook;
38a124f0
NC		 1427 else if (strEQ(s,"__WARN__")
1428 && (sv ? 1 : PL_warnhook != PERL_WARNHOOK_FATAL)) {
1429 /* Merge the existing behaviours, which are as follows:
1430 magic_setsig, we always set svp to &PL_warnhook
1431 (hence we always change the warnings handler)
1432 For magic_clearsig, we don't change the warnings handler if it's
1433 set to the &PL_warnhook. */
3280af22 1434 svp = &PL_warnhook;
38a124f0 1435 } else if (sv)
cea2e8a9 1436 Perl_croak(aTHX_ "No such hook: %s", s);
748a9306 1437 i = 0;
38a124f0 1438 if (svp && *svp) {
9289f461
RGS		 1439 if (*svp != PERL_WARNHOOK_FATAL)
1440 to_dec = *svp;
cbbf8932 1441 *svp = NULL;
4633a7c4 1442 }
748a9306
LW		 1443 }
1444 else {
708854f2
NC		 1445 i = (I16)mg->mg_private;
1446 if (!i) {
58a26b12
NC		 1447 i = whichsig(s); /* ...no, a brick */
1448 mg->mg_private = (U16)i;
708854f2 1449 }
86d86cad 1450 if (i <= 0) {
a2a5de95
NC		 1451 if (sv)
1452 Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL), "No such signal: SIG%s", s);
748a9306
LW		 1453 return 0;
1454 }
2d4fcd5e
AJ		 1455#ifdef HAS_SIGPROCMASK
1456 /* Avoid having the signal arrive at a bad time, if possible. */
1457 sigemptyset(&set);
1458 sigaddset(&set,i);
1459 sigprocmask(SIG_BLOCK, &set, &save);
1460 ENTER;
9ff8e806 1461 save_sv = newSVpvn((char *)(&save), sizeof(sigset_t));
2d4fcd5e
AJ		 1462 SAVEFREESV(save_sv);
1463 SAVEDESTRUCTOR_X(restore_sigmask, save_sv);
1464#endif
1465 PERL_ASYNC_CHECK();
2e34cc90 1466#if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
27da23d5 1467 if (!PL_sig_handlers_initted) Perl_csighandler_init();
2e34cc90 1468#endif
23ada85b 1469#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
27da23d5 1470 PL_sig_ignoring[i] = 0;
85b332e2 1471#endif
2e34cc90 1472#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
27da23d5 1473 PL_sig_defaulting[i] = 0;
2e34cc90 1474#endif
2d4fcd5e 1475 to_dec = PL_psig_ptr[i];
38a124f0
NC		 1476 if (sv) {
1477 PL_psig_ptr[i] = SvREFCNT_inc_simple_NN(sv);
1478 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
79fd3822
NC		 1479
1480 /* Signals don't change name during the program's execution, so once
1481 they're cached in the appropriate slot of PL_psig_name, they can
1482 stay there.
1483
1484 Ideally we'd find some way of making SVs at (C) compile time, or
1485 at least, doing most of the work. */
1486 if (!PL_psig_name[i]) {
1487 PL_psig_name[i] = newSVpvn(s, len);
1488 SvREADONLY_on(PL_psig_name[i]);
1489 }
38a124f0 1490 } else {
79fd3822 1491 SvREFCNT_dec(PL_psig_name[i]);
38a124f0
NC		 1492 PL_psig_name[i] = NULL;
1493 PL_psig_ptr[i] = NULL;
1494 }
748a9306 1495 }
38a124f0 1496 if (sv && (isGV_with_GP(sv) || SvROK(sv))) {
2d4fcd5e 1497 if (i) {
5c1546dc 1498 (void)rsignal(i, PL_csighandlerp);
2d4fcd5e 1499 }
748a9306 1500 else
b37c2d43 1501 *svp = SvREFCNT_inc_simple_NN(sv);
38a124f0 1502 } else {
9dfa190b
NC		 1503 if (sv && SvOK(sv)) {
1504 s = SvPV_force(sv, len);
1505 } else {
1506 sv = NULL;
1507 }
1508 if (sv && strEQ(s,"IGNORE")) {
1509 if (i) {
23ada85b 1510#ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
9dfa190b
NC		 1511 PL_sig_ignoring[i] = 1;
1512 (void)rsignal(i, PL_csighandlerp);
85b332e2 1513#else
9dfa190b 1514 (void)rsignal(i, (Sighandler_t) SIG_IGN);
85b332e2 1515#endif
9dfa190b 1516 }
2d4fcd5e 1517 }
9dfa190b
NC		 1518 else if (!sv || strEQ(s,"DEFAULT") || !len) {
1519 if (i) {
2e34cc90 1520#ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
9dfa190b
NC		 1521 PL_sig_defaulting[i] = 1;
1522 (void)rsignal(i, PL_csighandlerp);
2e34cc90 1523#else
9dfa190b 1524 (void)rsignal(i, (Sighandler_t) SIG_DFL);
2e34cc90 1525#endif
9dfa190b
NC		 1526 }
1527 }
1528 else {
1529 /*
1530 * We should warn if HINT_STRICT_REFS, but without
1531 * access to a known hint bit in a known OP, we can't
1532 * tell whether HINT_STRICT_REFS is in force or not.
1533 */
1534 if (!strchr(s,':') && !strchr(s,'\''))
1535 Perl_sv_insert_flags(aTHX_ sv, 0, 0, STR_WITH_LEN("main::"),
1536 SV_GMAGIC);
1537 if (i)
1538 (void)rsignal(i, PL_csighandlerp);
1539 else
1540 *svp = SvREFCNT_inc_simple_NN(sv);
136e0459 1541 }
748a9306 1542 }
9dfa190b 1543
2d4fcd5e
AJ		 1544#ifdef HAS_SIGPROCMASK
1545 if(i)
1546 LEAVE;
1547#endif
ef8d46e8 1548 SvREFCNT_dec(to_dec);
79072805
LW		 1549 return 0;
1550}
64ca3a65 1551#endif /* !PERL_MICRO */
79072805
LW		 1552
1553int
864dbfa3 1554Perl_magic_setisa(pTHX_ SV *sv, MAGIC *mg)
79072805 1555{
97aff369 1556 dVAR;
7918f24d 1557 PERL_ARGS_ASSERT_MAGIC_SETISA;
8772537c 1558 PERL_UNUSED_ARG(sv);
e1a479c5 1559
89c14e2e 1560 /* Skip _isaelem because _isa will handle it shortly */
354b0578 1561 if (PL_delaymagic & DM_ARRAY_ISA && mg->mg_type == PERL_MAGIC_isaelem)
89c14e2e
BB		 1562 return 0;
1563
0e446081 1564 return magic_clearisa(NULL, mg);
463ee0b2
LW		 1565}
1566
0e446081 1567/* sv of NULL signifies that we're acting as magic_setisa. */
463ee0b2 1568int
52b45067
RD		 1569Perl_magic_clearisa(pTHX_ SV *sv, MAGIC *mg)
1570{
1571 dVAR;
1572 HV* stash;
1573
7918f24d
NC		 1574 PERL_ARGS_ASSERT_MAGIC_CLEARISA;
1575
52b45067
RD		 1576 /* Bail out if destruction is going on */
1577 if(PL_dirty) return 0;
1578
0e446081
NC		 1579 if (sv)
1580 av_clear(MUTABLE_AV(sv));
52b45067 1581
0e446081
NC		 1582 /* XXX Once it's possible, we need to
1583 detect that our @ISA is aliased in
1584 other stashes, and act on the stashes
1585 of all of the aliases */
1586
1587 /* The first case occurs via setisa,
1588 the second via setisa_elem, which
1589 calls this same magic */
52b45067
RD		 1590 stash = GvSTASH(
1591 SvTYPE(mg->mg_obj) == SVt_PVGV
159b6efe
NC		 1592 ? (const GV *)mg->mg_obj
1593 : (const GV *)mg_find(mg->mg_obj, PERL_MAGIC_isa)->mg_obj
52b45067
RD		 1594 );
1595
5562fa71
RGS		 1596 if (stash)
1597 mro_isa_changed_in(stash);
52b45067
RD		 1598
1599 return 0;
1600}
1601
1602int
864dbfa3 1603Perl_magic_setamagic(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 1604{
97aff369 1605 dVAR;
7918f24d 1606 PERL_ARGS_ASSERT_MAGIC_SETAMAGIC;
8772537c
AL		 1607 PERL_UNUSED_ARG(sv);
1608 PERL_UNUSED_ARG(mg);
3280af22 1609 PL_amagic_generation++;
463ee0b2 1610
a0d0e21e
LW		 1611 return 0;
1612}
463ee0b2 1613
946ec16e 1614int
864dbfa3 1615Perl_magic_getnkeys(pTHX_ SV *sv, MAGIC *mg)
6ff81951 1616{
85fbaab2 1617 HV * const hv = MUTABLE_HV(LvTARG(sv));
6ff81951 1618 I32 i = 0;
7918f24d
NC		 1619
1620 PERL_ARGS_ASSERT_MAGIC_GETNKEYS;
8772537c 1621 PERL_UNUSED_ARG(mg);
7719e241 1622
6ff81951 1623 if (hv) {
497b47a8 1624 (void) hv_iterinit(hv);
ad64d0ec 1625 if (! SvTIED_mg((const SV *)hv, PERL_MAGIC_tied))
497b47a8
JH		 1626 i = HvKEYS(hv);
1627 else {
1628 while (hv_iternext(hv))
1629 i++;
1630 }
6ff81951
GS		 1631 }
1632
1633 sv_setiv(sv, (IV)i);
1634 return 0;
1635}
1636
1637int
864dbfa3 1638Perl_magic_setnkeys(pTHX_ SV *sv, MAGIC *mg)
946ec16e 1639{
7918f24d 1640 PERL_ARGS_ASSERT_MAGIC_SETNKEYS;
8772537c 1641 PERL_UNUSED_ARG(mg);
946ec16e 1642 if (LvTARG(sv)) {
85fbaab2 1643 hv_ksplit(MUTABLE_HV(LvTARG(sv)), SvIV(sv));
946ec16e 1644 }
1645 return 0;
ac27b0f5 1646}
946ec16e 1647
efaf3674
DM		 1648/*
1649=for apidoc magic_methcall
1650
1651Invoke a magic method (like FETCH).
1652
1653* sv and mg are the tied thinggy and the tie magic;
1654* meth is the name of the method to call;
1a1a5af7
DM		 1655* argc is the number of args (in addition to $self) to pass to the method;
1656 the args themselves are any values following the argc argument.
efaf3674
DM		 1657* flags:
1658 G_DISCARD: invoke method with G_DISCARD flag and don't return a value
1a1a5af7 1659 G_UNDEF_FILL: fill the stack with argc pointers to PL_sv_undef.
efaf3674
DM		 1660
1661Returns the SV (if any) returned by the method, or NULL on failure.
1662
1663
1664=cut
1665*/
1666
1667SV*
c7a0c747 1668Perl_magic_methcall(pTHX_ SV *sv, const MAGIC *mg, const char *meth, U32 flags,
046b0c7d 1669 U32 argc, ...)
a0d0e21e 1670{
97aff369 1671 dVAR;
a0d0e21e 1672 dSP;
efaf3674 1673 SV* ret = NULL;
463ee0b2 1674
7918f24d
NC		 1675 PERL_ARGS_ASSERT_MAGIC_METHCALL;
1676
efaf3674
DM		 1677 ENTER;
1678 PUSHSTACKi(PERLSI_MAGIC);
924508f0 1679 PUSHMARK(SP);
efaf3674 1680
67549bd2
NC		 1681 EXTEND(SP, argc+1);
1682 PUSHs(SvTIED_obj(sv, mg));
1683 if (flags & G_UNDEF_FILL) {
1684 while (argc--) {
efaf3674 1685 PUSHs(&PL_sv_undef);
93965878 1686 }
67549bd2 1687 } else if (argc > 0) {
046b0c7d
NC		 1688 va_list args;
1689 va_start(args, argc);
1690
1691 do {
1692 SV *const sv = va_arg(args, SV *);
1693 PUSHs(sv);
1694 } while (--argc);
1695
1696 va_end(args);
88e89b8a 1697 }
463ee0b2 1698 PUTBACK;
efaf3674
DM		 1699 if (flags & G_DISCARD) {
1700 call_method(meth, G_SCALAR|G_DISCARD);
1701 }
1702 else {
1703 if (call_method(meth, G_SCALAR))
1704 ret = *PL_stack_sp--;
1705 }
1706 POPSTACK;
1707 LEAVE;
1708 return ret;
1709}
1710
1711
1712/* wrapper for magic_methcall that creates the first arg */
463ee0b2 1713
efaf3674 1714STATIC SV*
c7a0c747 1715S_magic_methcall1(pTHX_ SV *sv, const MAGIC *mg, const char *meth, U32 flags,
efaf3674
DM		 1716 int n, SV *val)
1717{
1718 dVAR;
1719 SV* arg1 = NULL;
1720
1721 PERL_ARGS_ASSERT_MAGIC_METHCALL1;
1722
1723 if (mg->mg_ptr) {
1724 if (mg->mg_len >= 0) {
db4b3a1d 1725 arg1 = newSVpvn_flags(mg->mg_ptr, mg->mg_len, SVs_TEMP);
efaf3674
DM		 1726 }
1727 else if (mg->mg_len == HEf_SVKEY)
1728 arg1 = MUTABLE_SV(mg->mg_ptr);
1729 }
1730 else if (mg->mg_type == PERL_MAGIC_tiedelem) {
db4b3a1d 1731 arg1 = newSViv((IV)(mg->mg_len));
efaf3674
DM		 1732 sv_2mortal(arg1);
1733 }
1734 if (!arg1) {
046b0c7d 1735 return Perl_magic_methcall(aTHX_ sv, mg, meth, flags, n - 1, val);
efaf3674 1736 }
046b0c7d 1737 return Perl_magic_methcall(aTHX_ sv, mg, meth, flags, n, arg1, val);
946ec16e 1738}
1739
76e3520e 1740STATIC int
e1ec3a88 1741S_magic_methpack(pTHX_ SV *sv, const MAGIC *mg, const char *meth)
a0d0e21e 1742{
efaf3674
DM		 1743 dVAR;
1744 SV* ret;
463ee0b2 1745
7918f24d
NC		 1746 PERL_ARGS_ASSERT_MAGIC_METHPACK;
1747
efaf3674
DM		 1748 ret = magic_methcall1(sv, mg, meth, 0, 1, NULL);
1749 if (ret)
1750 sv_setsv(sv, ret);
a0d0e21e
LW		 1751 return 0;
1752}
463ee0b2 1753
a0d0e21e 1754int
864dbfa3 1755Perl_magic_getpack(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 1756{
7918f24d
NC		 1757 PERL_ARGS_ASSERT_MAGIC_GETPACK;
1758
fd69380d 1759 if (mg->mg_type == PERL_MAGIC_tiedelem)
a0d0e21e 1760 mg->mg_flags |= MGf_GSKIP;
58f82c5c 1761 magic_methpack(sv,mg,"FETCH");
463ee0b2
LW		 1762 return 0;
1763}
1764
1765int
864dbfa3 1766Perl_magic_setpack(pTHX_ SV *sv, MAGIC *mg)
e336de0d 1767{
efaf3674 1768 dVAR;
b112cff9
DM		 1769 MAGIC *tmg;
1770 SV *val;
7918f24d
NC		 1771
1772 PERL_ARGS_ASSERT_MAGIC_SETPACK;
1773
b112cff9
DM		 1774 /* in the code C<$tied{foo} = $val>, the "thing" that gets passed to
1775 * STORE() is not $val, but rather a PVLV (the sv in this call), whose
1776 * public flags indicate its value based on copying from $val. Doing
1777 * mg_set() on the PVLV temporarily does SvMAGICAL_off(), then calls us.
1778 * So STORE()'s $_[2] arg is a temporarily disarmed PVLV. This goes
1779 * wrong if $val happened to be tainted, as sv hasn't got magic
1780 * enabled, even though taint magic is in the chain. In which case,
1781 * fake up a temporary tainted value (this is easier than temporarily
1782 * re-enabling magic on sv). */
1783
1784 if (PL_tainting && (tmg = mg_find(sv, PERL_MAGIC_taint))
1785 && (tmg->mg_len & 1))
1786 {
1787 val = sv_mortalcopy(sv);
1788 SvTAINTED_on(val);
1789 }
1790 else
1791 val = sv;
1792
efaf3674 1793 magic_methcall1(sv, mg, "STORE", G_DISCARD, 2, val);
463ee0b2
LW		 1794 return 0;
1795}
1796
1797int
864dbfa3 1798Perl_magic_clearpack(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 1799{
7918f24d
NC		 1800 PERL_ARGS_ASSERT_MAGIC_CLEARPACK;
1801
a0d0e21e
LW		 1802 return magic_methpack(sv,mg,"DELETE");
1803}
463ee0b2 1804
93965878
NIS		 1805
1806U32
864dbfa3 1807Perl_magic_sizepack(pTHX_ SV *sv, MAGIC *mg)
ac27b0f5 1808{
efaf3674 1809 dVAR;
22846ab4 1810 I32 retval = 0;
efaf3674 1811 SV* retsv;
93965878 1812
7918f24d
NC		 1813 PERL_ARGS_ASSERT_MAGIC_SIZEPACK;
1814
efaf3674
DM		 1815 retsv = magic_methcall1(sv, mg, "FETCHSIZE", 0, 1, NULL);
1816 if (retsv) {
1817 retval = SvIV(retsv)-1;
22846ab4
AB		 1818 if (retval < -1)
1819 Perl_croak(aTHX_ "FETCHSIZE returned a negative value");
93965878 1820 }
22846ab4 1821 return (U32) retval;
93965878
NIS		 1822}
1823
cea2e8a9
GS		 1824int
1825Perl_magic_wipepack(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 1826{
efaf3674 1827 dVAR;
463ee0b2 1828
7918f24d
NC		 1829 PERL_ARGS_ASSERT_MAGIC_WIPEPACK;
1830
046b0c7d 1831 Perl_magic_methcall(aTHX_ sv, mg, "CLEAR", G_DISCARD, 0);
463ee0b2
LW		 1832 return 0;
1833}
1834
1835int
864dbfa3 1836Perl_magic_nextpack(pTHX_ SV *sv, MAGIC *mg, SV *key)
463ee0b2 1837{
efaf3674
DM		 1838 dVAR;
1839 SV* ret;
463ee0b2 1840
7918f24d
NC		 1841 PERL_ARGS_ASSERT_MAGIC_NEXTPACK;
1842
046b0c7d
NC		 1843 ret = SvOK(key) ? Perl_magic_methcall(aTHX_ sv, mg, "NEXTKEY", 0, 1, key)
1844 : Perl_magic_methcall(aTHX_ sv, mg, "FIRSTKEY", 0, 0);
efaf3674
DM		 1845 if (ret)
1846 sv_setsv(key,ret);
79072805
LW		 1847 return 0;
1848}
1849
1850int
1146e912 1851Perl_magic_existspack(pTHX_ SV *sv, const MAGIC *mg)
a0d0e21e 1852{
7918f24d
NC		 1853 PERL_ARGS_ASSERT_MAGIC_EXISTSPACK;
1854
a0d0e21e 1855 return magic_methpack(sv,mg,"EXISTS");
ac27b0f5 1856}
a0d0e21e 1857
a3bcc51e
TP		 1858SV *
1859Perl_magic_scalarpack(pTHX_ HV *hv, MAGIC *mg)
1860{
efaf3674 1861 dVAR;
5fcbf73d 1862 SV *retval;
ad64d0ec
NC		 1863 SV * const tied = SvTIED_obj(MUTABLE_SV(hv), mg);
1864 HV * const pkg = SvSTASH((const SV *)SvRV(tied));
a3bcc51e 1865
7918f24d
NC		 1866 PERL_ARGS_ASSERT_MAGIC_SCALARPACK;
1867
a3bcc51e
TP		 1868 if (!gv_fetchmethod_autoload(pkg, "SCALAR", FALSE)) {
1869 SV *key;
bfcb3514 1870 if (HvEITER_get(hv))
a3bcc51e
TP		 1871 /* we are in an iteration so the hash cannot be empty */
1872 return &PL_sv_yes;
1873 /* no xhv_eiter so now use FIRSTKEY */
1874 key = sv_newmortal();
ad64d0ec 1875 magic_nextpack(MUTABLE_SV(hv), mg, key);
bfcb3514 1876 HvEITER_set(hv, NULL); /* need to reset iterator */
a3bcc51e
TP		 1877 return SvOK(key) ? &PL_sv_yes : &PL_sv_no;
1878 }
1879
1880 /* there is a SCALAR method that we can call */
046b0c7d 1881 retval = Perl_magic_methcall(aTHX_ MUTABLE_SV(hv), mg, "SCALAR", 0, 0);
efaf3674 1882 if (!retval)
5fcbf73d 1883 retval = &PL_sv_undef;
a3bcc51e
TP		 1884 return retval;
1885}
1886
a0d0e21e 1887int
864dbfa3 1888Perl_magic_setdbline(pTHX_ SV *sv, MAGIC *mg)
79072805 1889{
97aff369 1890 dVAR;
8772537c
AL		 1891 GV * const gv = PL_DBline;
1892 const I32 i = SvTRUE(sv);
1893 SV ** const svp = av_fetch(GvAV(gv),
01b8bcb7 1894 atoi(MgPV_nolen_const(mg)), FALSE);
7918f24d
NC		 1895
1896 PERL_ARGS_ASSERT_MAGIC_SETDBLINE;
1897
8772537c
AL		 1898 if (svp && SvIOKp(*svp)) {
1899 OP * const o = INT2PTR(OP*,SvIVX(*svp));
1900 if (o) {
1901 /* set or clear breakpoint in the relevant control op */
1902 if (i)
1903 o->op_flags |= OPf_SPECIAL;
1904 else
1905 o->op_flags &= ~OPf_SPECIAL;
1906 }
5df8de69 1907 }
79072805
LW		 1908 return 0;
1909}
1910
1911int
8772537c 1912Perl_magic_getarylen(pTHX_ SV *sv, const MAGIC *mg)
79072805 1913{
97aff369 1914 dVAR;
502c6561 1915 AV * const obj = MUTABLE_AV(mg->mg_obj);
7918f24d
NC		 1916
1917 PERL_ARGS_ASSERT_MAGIC_GETARYLEN;
1918
83bf042f 1919 if (obj) {
fc15ae8f 1920 sv_setiv(sv, AvFILL(obj) + CopARYBASE_get(PL_curcop));
83bf042f
NC		 1921 } else {
1922 SvOK_off(sv);
1923 }
79072805
LW		 1924 return 0;
1925}
1926
1927int
864dbfa3 1928Perl_magic_setarylen(pTHX_ SV *sv, MAGIC *mg)
79072805 1929{
97aff369 1930 dVAR;
502c6561 1931 AV * const obj = MUTABLE_AV(mg->mg_obj);
7918f24d
NC		 1932
1933 PERL_ARGS_ASSERT_MAGIC_SETARYLEN;
1934
83bf042f 1935 if (obj) {
fc15ae8f 1936 av_fill(obj, SvIV(sv) - CopARYBASE_get(PL_curcop));
83bf042f 1937 } else {
a2a5de95
NC		 1938 Perl_ck_warner(aTHX_ packWARN(WARN_MISC),
1939 "Attempt to set length of freed array");
83bf042f
NC		 1940 }
1941 return 0;
1942}
1943
1944int
1945Perl_magic_freearylen_p(pTHX_ SV *sv, MAGIC *mg)
1946{
97aff369 1947 dVAR;
7918f24d
NC		 1948
1949 PERL_ARGS_ASSERT_MAGIC_FREEARYLEN_P;
53c1dcc0 1950 PERL_UNUSED_ARG(sv);
7918f24d 1951
94f3782b
DM		 1952 /* during global destruction, mg_obj may already have been freed */
1953 if (PL_in_clean_all)
1ea47f64 1954 return 0;
94f3782b 1955
83bf042f
NC		 1956 mg = mg_find (mg->mg_obj, PERL_MAGIC_arylen);
1957
1958 if (mg) {
1959 /* arylen scalar holds a pointer back to the array, but doesn't own a
1960 reference. Hence the we (the array) are about to go away with it
1961 still pointing at us. Clear its pointer, else it would be pointing
1962 at free memory. See the comment in sv_magic about reference loops,
1963 and why it can't own a reference to us. */
1964 mg->mg_obj = 0;
1965 }
a0d0e21e
LW		 1966 return 0;
1967}
1968
1969int
864dbfa3 1970Perl_magic_getpos(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 1971{
97aff369 1972 dVAR;
8772537c 1973 SV* const lsv = LvTARG(sv);
7918f24d
NC		 1974
1975 PERL_ARGS_ASSERT_MAGIC_GETPOS;
3881461a 1976 PERL_UNUSED_ARG(mg);
ac27b0f5 1977
a0d0e21e 1978 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
3881461a
AL		 1979 MAGIC * const found = mg_find(lsv, PERL_MAGIC_regex_global);
1980 if (found && found->mg_len >= 0) {
1981 I32 i = found->mg_len;
7e2040f0 1982 if (DO_UTF8(lsv))
a0ed51b3 1983 sv_pos_b2u(lsv, &i);
fc15ae8f 1984 sv_setiv(sv, i + CopARYBASE_get(PL_curcop));
a0d0e21e
LW		 1985 return 0;
1986 }
1987 }
0c34ef67 1988 SvOK_off(sv);
a0d0e21e
LW		 1989 return 0;
1990}
1991
1992int
864dbfa3 1993Perl_magic_setpos(pTHX_ SV *sv, MAGIC *mg)
a0d0e21e 1994{
97aff369 1995 dVAR;
8772537c 1996 SV* const lsv = LvTARG(sv);
a0d0e21e
LW		 1997 SSize_t pos;
1998 STRLEN len;
c00206c8 1999 STRLEN ulen = 0;
53d44271 2000 MAGIC* found;
a0d0e21e 2001
7918f24d 2002 PERL_ARGS_ASSERT_MAGIC_SETPOS;
3881461a 2003 PERL_UNUSED_ARG(mg);
ac27b0f5 2004
a0d0e21e 2005 if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
3881461a
AL		 2006 found = mg_find(lsv, PERL_MAGIC_regex_global);
2007 else
2008 found = NULL;
2009 if (!found) {
a0d0e21e
LW		 2010 if (!SvOK(sv))
2011 return 0;
d83f0a82
NC		 2012#ifdef PERL_OLD_COPY_ON_WRITE
2013 if (SvIsCOW(lsv))
2014 sv_force_normal_flags(lsv, 0);
2015#endif
3881461a 2016 found = sv_magicext(lsv, NULL, PERL_MAGIC_regex_global, &PL_vtbl_mglob,
53d44271 2017 NULL, 0);
a0d0e21e
LW		 2018 }
2019 else if (!SvOK(sv)) {
3881461a 2020 found->mg_len = -1;
a0d0e21e
LW		 2021 return 0;
2022 }
2023 len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
2024
fc15ae8f 2025 pos = SvIV(sv) - CopARYBASE_get(PL_curcop);
a0ed51b3 2026
7e2040f0 2027 if (DO_UTF8(lsv)) {
a0ed51b3
LW		 2028 ulen = sv_len_utf8(lsv);
2029 if (ulen)
2030 len = ulen;
a0ed51b3
LW		 2031 }
2032
a0d0e21e
LW		 2033 if (pos < 0) {
2034 pos += len;
2035 if (pos < 0)
2036 pos = 0;
2037 }
eb160463 2038 else if (pos > (SSize_t)len)
a0d0e21e 2039 pos = len;
a0ed51b3
LW		 2040
2041 if (ulen) {
2042 I32 p = pos;
2043 sv_pos_u2b(lsv, &p, 0);
2044 pos = p;
2045 }
727405f8 2046
3881461a
AL		 2047 found->mg_len = pos;
2048 found->mg_flags &= ~MGf_MINMATCH;
a0d0e21e 2049
79072805
LW		 2050 return 0;
2051}
2052
2053int
864dbfa3 2054Perl_magic_getsubstr(pTHX_ SV *sv, MAGIC *mg)
6ff81951
GS		 2055{
2056 STRLEN len;
35a4481c 2057 SV * const lsv = LvTARG(sv);
b83604b4 2058 const char * const tmps = SvPV_const(lsv,len);
777f7c56
EB		 2059 STRLEN offs = LvTARGOFF(sv);
2060 STRLEN rem = LvTARGLEN(sv);
7918f24d
NC		 2061
2062 PERL_ARGS_ASSERT_MAGIC_GETSUBSTR;
8772537c 2063 PERL_UNUSED_ARG(mg);
6ff81951 2064
9aa983d2 2065 if (SvUTF8(lsv))
d931b1be 2066 offs = sv_pos_u2b_flags(lsv, offs, &rem, SV_CONST_RETURN);
777f7c56 2067 if (offs > len)
6ff81951 2068 offs = len;
777f7c56 2069 if (rem > len - offs)
6ff81951 2070 rem = len - offs;
1c900557 2071 sv_setpvn(sv, tmps + offs, rem);
9aa983d2 2072 if (SvUTF8(lsv))
2ef4b674 2073 SvUTF8_on(sv);
6ff81951
GS		 2074 return 0;
2075}
2076
2077int
864dbfa3 2078Perl_magic_setsubstr(pTHX_ SV *sv, MAGIC *mg)
79072805 2079{
97aff369 2080 dVAR;
9aa983d2 2081 STRLEN len;
5fcbf73d 2082 const char * const tmps = SvPV_const(sv, len);
dd374669 2083 SV * const lsv = LvTARG(sv);
777f7c56
EB		 2084 STRLEN lvoff = LvTARGOFF(sv);
2085 STRLEN lvlen = LvTARGLEN(sv);
7918f24d
NC		 2086
2087 PERL_ARGS_ASSERT_MAGIC_SETSUBSTR;
8772537c 2088 PERL_UNUSED_ARG(mg);
075a4a2b 2089
1aa99e6b 2090 if (DO_UTF8(sv)) {
9aa983d2 2091 sv_utf8_upgrade(lsv);
d931b1be 2092 lvoff = sv_pos_u2b_flags(lsv, lvoff, &lvlen, SV_CONST_RETURN);
9aa983d2 2093 sv_insert(lsv, lvoff, lvlen, tmps, len);
b76f3ce2 2094 LvTARGLEN(sv) = sv_len_utf8(sv);
9aa983d2
JH		 2095 SvUTF8_on(lsv);
2096 }
9bf12eaf 2097 else if (lsv && SvUTF8(lsv)) {
5fcbf73d 2098 const char *utf8;
d931b1be 2099 lvoff = sv_pos_u2b_flags(lsv, lvoff, &lvlen, SV_CONST_RETURN);
b76f3ce2 2100 LvTARGLEN(sv) = len;
5fcbf73d
AL		 2101 utf8 = (char*)bytes_to_utf8((U8*)tmps, &len);
2102 sv_insert(lsv, lvoff, lvlen, utf8, len);
2103 Safefree(utf8);
1aa99e6b 2104 }
b76f3ce2
GB		 2105 else {
2106 sv_insert(lsv, lvoff, lvlen, tmps, len);
2107 LvTARGLEN(sv) = len;
2108 }
2109
79072805
LW		 2110 return 0;
2111}
2112
2113int
864dbfa3 2114Perl_magic_gettaint(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 2115{
97aff369 2116 dVAR;
7918f24d
NC		 2117
2118 PERL_ARGS_ASSERT_MAGIC_GETTAINT;
8772537c 2119 PERL_UNUSED_ARG(sv);
7918f24d 2120
27cc343c 2121 TAINT_IF((PL_localizing != 1) && (mg->mg_len & 1));
463ee0b2
LW		 2122 return 0;
2123}
2124
2125int
864dbfa3 2126Perl_magic_settaint(pTHX_ SV *sv, MAGIC *mg)
463ee0b2 2127{
97aff369 2128 dVAR;
7918f24d
NC		 2129
2130 PERL_ARGS_ASSERT_MAGIC_SETTAINT;
8772537c 2131 PERL_UNUSED_ARG(sv);
7918f24d 2132
b01e650a
DM		 2133 /* update taint status */
2134 if (PL_tainted)
2135 mg->mg_len |= 1;
2136 else
2137 mg->mg_len &= ~1;
463ee0b2
LW		 2138 return 0;
2139}
2140
2141int
864dbfa3 2142Perl_magic_getvec(pTHX_ SV *sv, MAGIC *mg)
6ff81951 2143{
35a4481c 2144 SV * const lsv = LvTARG(sv);
7918f24d
NC		 2145
2146 PERL_ARGS_ASSERT_MAGIC_GETVEC;
8772537c 2147 PERL_UNUSED_ARG(mg);
6ff81951 2148
6136c704
AL		 2149 if (lsv)
2150 sv_setuv(sv, do_vecget(lsv, LvTARGOFF(sv), LvTARGLEN(sv)));
2151 else
0c34ef67 2152 SvOK_off(sv);
6ff81951 2153
6ff81951
GS		 2154 return 0;
2155}
2156
2157int
864dbfa3 2158Perl_magic_setvec(pTHX_ SV *sv, MAGIC *mg)
79072805 2159{
7918f24d 2160 PERL_ARGS_ASSERT_MAGIC_SETVEC;
8772537c 2161 PERL_UNUSED_ARG(mg);
79072805
LW		 2162 do_vecset(sv); /* XXX slurp this routine */
2163 return 0;
2164}
2165
2166int
864dbfa3 2167Perl_magic_getdefelem(pTHX_ SV *sv, MAGIC *mg)
5f05dabc 2168{
97aff369 2169 dVAR;
a0714e2c 2170 SV *targ = NULL;
7918f24d
NC		 2171
2172 PERL_ARGS_ASSERT_MAGIC_GETDEFELEM;
2173
5f05dabc 2174 if (LvTARGLEN(sv)) {
68dc0745 2175 if (mg->mg_obj) {
8772537c 2176 SV * const ahv = LvTARG(sv);
85fbaab2 2177 HE * const he = hv_fetch_ent(MUTABLE_HV(ahv), mg->mg_obj, FALSE, 0);
6d822dc4
MS		 2178 if (he)
2179 targ = HeVAL(he);
68dc0745 2180 }
2181 else {
502c6561 2182 AV *const av = MUTABLE_AV(LvTARG(sv));
68dc0745 2183 if ((I32)LvTARGOFF(sv) <= AvFILL(av))
2184 targ = AvARRAY(av)[LvTARGOFF(sv)];
2185 }
46da273f 2186 if (targ && (targ != &PL_sv_undef)) {
68dc0745 2187 /* somebody else defined it for us */
2188 SvREFCNT_dec(LvTARG(sv));
b37c2d43 2189 LvTARG(sv) = SvREFCNT_inc_simple_NN(targ);
68dc0745 2190 LvTARGLEN(sv) = 0;
2191 SvREFCNT_dec(mg->mg_obj);
a0714e2c 2192 mg->mg_obj = NULL;
68dc0745 2193 mg->mg_flags &= ~MGf_REFCOUNTED;
2194 }
5f05dabc 2195 }
71be2cbc 2196 else
2197 targ = LvTARG(sv);
3280af22 2198 sv_setsv(sv, targ ? targ : &PL_sv_undef);
71be2cbc 2199 return 0;
2200}
2201
2202int
864dbfa3 2203Perl_magic_setdefelem(pTHX_ SV *sv, MAGIC *mg)
71be2cbc 2204{
7918f24d 2205 PERL_ARGS_ASSERT_MAGIC_SETDEFELEM;
8772537c 2206 PERL_UNUSED_ARG(mg);
71be2cbc 2207 if (LvTARGLEN(sv))
68dc0745 2208 vivify_defelem(sv);
2209 if (LvTARG(sv)) {
5f05dabc 2210 sv_setsv(LvTARG(sv), sv);
68dc0745 2211 SvSETMAGIC(LvTARG(sv));
2212 }
5f05dabc 2213 return 0;
2214}
2215
71be2cbc 2216void
864dbfa3 2217Perl_vivify_defelem(pTHX_ SV *sv)
71be2cbc 2218{
97aff369 2219 dVAR;
74e13ce4 2220 MAGIC *mg;
a0714e2c 2221 SV *value = NULL;
71be2cbc 2222
7918f24d
NC		 2223 PERL_ARGS_ASSERT_VIVIFY_DEFELEM;
2224
14befaf4 2225 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, PERL_MAGIC_defelem)))
71be2cbc 2226 return;
68dc0745 2227 if (mg->mg_obj) {
8772537c 2228 SV * const ahv = LvTARG(sv);
85fbaab2 2229 HE * const he = hv_fetch_ent(MUTABLE_HV(ahv), mg->mg_obj, TRUE, 0);
6d822dc4
MS		 2230 if (he)
2231 value = HeVAL(he);
3280af22 2232 if (!value || value == &PL_sv_undef)
be2597df 2233 Perl_croak(aTHX_ PL_no_helem_sv, SVfARG(mg->mg_obj));
71be2cbc 2234 }
68dc0745 2235 else {
502c6561 2236 AV *const av = MUTABLE_AV(LvTARG(sv));
5aabfad6 2237 if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
a0714e2c 2238 LvTARG(sv) = NULL; /* array can't be extended */
68dc0745 2239 else {
d4c19fe8 2240 SV* const * const svp = av_fetch(av, LvTARGOFF(sv), TRUE);
3280af22 2241 if (!svp || (value = *svp) == &PL_sv_undef)
cea2e8a9 2242 Perl_croak(aTHX_ PL_no_aelem, (I32)LvTARGOFF(sv));
68dc0745 2243 }
2244 }
b37c2d43 2245 SvREFCNT_inc_simple_void(value);
68dc0745 2246 SvREFCNT_dec(LvTARG(sv));
2247 LvTARG(sv) = value;
71be2cbc 2248 LvTARGLEN(sv) = 0;
68dc0745 2249 SvREFCNT_dec(mg->mg_obj);
a0714e2c 2250 mg->mg_obj = NULL;
68dc0745 2251 mg->mg_flags &= ~MGf_REFCOUNTED;
5f05dabc 2252}
2253
2254int
864dbfa3 2255Perl_magic_killbackrefs(pTHX_ SV *sv, MAGIC *mg)
810b8aa5 2256{
7918f24d 2257 PERL_ARGS_ASSERT_MAGIC_KILLBACKREFS;
502c6561 2258 return Perl_sv_kill_backrefs(aTHX_ sv, MUTABLE_AV(mg->mg_obj));
810b8aa5
GS		 2259}
2260
2261int
864dbfa3 2262Perl_magic_setmglob(pTHX_ SV *sv, MAGIC *mg)
93a17b20 2263{
7918f24d 2264 PERL_ARGS_ASSERT_MAGIC_SETMGLOB;
96a5add6 2265 PERL_UNUSED_CONTEXT;
565764a8 2266 mg->mg_len = -1;
1f730e6c
FC		 2267 if (!isGV_with_GP(sv))
2268 SvSCREAM_off(sv);
93a17b20
LW		 2269 return 0;
2270}
2271
2272int
864dbfa3 2273Perl_magic_setuvar(pTHX_ SV *sv, MAGIC *mg)
79072805 2274{
35a4481c 2275 const struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr;
79072805 2276
7918f24d
NC		 2277 PERL_ARGS_ASSERT_MAGIC_SETUVAR;
2278
79072805 2279 if (uf && uf->uf_set)
24f81a43 2280 (*uf->uf_set)(aTHX_ uf->uf_index, sv);
79072805
LW		 2281 return 0;
2282}
2283
c277df42 2284int
faf82a0b
AE		 2285Perl_magic_setregexp(pTHX_ SV *sv, MAGIC *mg)
2286{
488344d2 2287 const char type = mg->mg_type;
7918f24d
NC		 2288
2289 PERL_ARGS_ASSERT_MAGIC_SETREGEXP;
2290
488344d2
NC		 2291 if (type == PERL_MAGIC_qr) {
2292 } else if (type == PERL_MAGIC_bm) {
2293 SvTAIL_off(sv);
2294 SvVALID_off(sv);
2295 } else {
2296 assert(type == PERL_MAGIC_fm);
2297 SvCOMPILED_off(sv);
2298 }
2299 return sv_unmagic(sv, type);
faf82a0b
AE		 2300}
2301
7a4c00b4 2302#ifdef USE_LOCALE_COLLATE
79072805 2303int
864dbfa3 2304Perl_magic_setcollxfrm(pTHX_ SV *sv, MAGIC *mg)
bbce6d69 2305{
7918f24d
NC		 2306 PERL_ARGS_ASSERT_MAGIC_SETCOLLXFRM;
2307
bbce6d69 2308 /*
838b5b74 2309 * RenE<eacute> Descartes said "I think not."
bbce6d69 2310 * and vanished with a faint plop.
2311 */
96a5add6 2312 PERL_UNUSED_CONTEXT;
8772537c 2313 PERL_UNUSED_ARG(sv);
7a4c00b4 2314 if (mg->mg_ptr) {
2315 Safefree(mg->mg_ptr);
2316 mg->mg_ptr = NULL;
565764a8 2317 mg->mg_len = -1;
7a4c00b4 2318 }
bbce6d69 2319 return 0;
2320}
7a4c00b4 2321#endif /* USE_LOCALE_COLLATE */
bbce6d69 2322
7e8c5dac
HS		 2323/* Just clear the UTF-8 cache data. */
2324int
2325Perl_magic_setutf8(pTHX_ SV *sv, MAGIC *mg)
2326{
7918f24d 2327 PERL_ARGS_ASSERT_MAGIC_SETUTF8;
96a5add6 2328 PERL_UNUSED_CONTEXT;
8772537c 2329 PERL_UNUSED_ARG(sv);
7e8c5dac 2330 Safefree(mg->mg_ptr); /* The mg_ptr holds the pos cache. */
3881461a 2331 mg->mg_ptr = NULL;
7e8c5dac
HS		 2332 mg->mg_len = -1; /* The mg_len holds the len cache. */
2333 return 0;
2334}
2335
bbce6d69 2336int
864dbfa3 2337Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
79072805 2338{
97aff369 2339 dVAR;
e1ec3a88 2340 register const char *s;
2fdbfb4d
AB		 2341 register I32 paren;
2342 register const REGEXP * rx;
2343 const char * const remaining = mg->mg_ptr + 1;
79072805 2344 I32 i;
8990e307 2345 STRLEN len;
2fdbfb4d 2346
7918f24d
NC		 2347 PERL_ARGS_ASSERT_MAGIC_SET;
2348
79072805 2349 switch (*mg->mg_ptr) {
2fdbfb4d
AB		 2350 case '\015': /* $^MATCH */
2351 if (strEQ(remaining, "ATCH"))
2352 goto do_match;
2353 case '`': /* ${^PREMATCH} caught below */
2354 do_prematch:
f1b875a0 2355 paren = RX_BUFF_IDX_PREMATCH;
2fdbfb4d
AB		 2356 goto setparen;
2357 case '\'': /* ${^POSTMATCH} caught below */
2358 do_postmatch:
f1b875a0 2359 paren = RX_BUFF_IDX_POSTMATCH;
2fdbfb4d
AB		 2360 goto setparen;
2361 case '&':
2362 do_match:
f1b875a0 2363 paren = RX_BUFF_IDX_FULLMATCH;
2fdbfb4d
AB		 2364 goto setparen;
2365 case '1': case '2': case '3': case '4':
2366 case '5': case '6': case '7': case '8': case '9':
104a8018 2367 paren = atoi(mg->mg_ptr);
2fdbfb4d 2368 setparen:
1e05feb3 2369 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
2fdbfb4d
AB		 2370 CALLREG_NUMBUF_STORE((REGEXP * const)rx,paren,sv);
2371 break;
1e05feb3 2372 } else {
2fdbfb4d
AB		 2373 /* Croak with a READONLY error when a numbered match var is
2374 * set without a previous pattern match. Unless it's C<local $1>
2375 */
2376 if (!PL_localizing) {
6ad8f254 2377 Perl_croak_no_modify(aTHX);
2fdbfb4d
AB		 2378 }
2379 }
748a9306 2380 case '\001': /* ^A */
3280af22 2381 sv_setsv(PL_bodytarget, sv);
748a9306 2382 break;
49460fe6 2383 case '\003': /* ^C */
f2338a2e 2384 PL_minus_c = cBOOL(SvIV(sv));
49460fe6
NIS		 2385 break;
2386
79072805 2387 case '\004': /* ^D */
b4ab917c 2388#ifdef DEBUGGING
b83604b4 2389 s = SvPV_nolen_const(sv);
ddcf8bc1 2390 PL_debug = get_debug_opts(&s, 0) | DEBUG_TOP_FLAG;
a58fb6f9
CS		 2391 if (DEBUG_x_TEST || DEBUG_B_TEST)
2392 dump_all_perl(!DEBUG_B_TEST);
b4ab917c 2393#else
38ab35f8 2394 PL_debug = (SvIV(sv)) | DEBUG_TOP_FLAG;
b4ab917c 2395#endif
79072805 2396 break;
28f23441 2397 case '\005': /* ^E */
d0063567 2398 if (*(mg->mg_ptr+1) == '\0') {
e37778c2 2399#ifdef VMS
38ab35f8 2400 set_vaxc_errno(SvIV(sv));
e37778c2
NC		 2401#else
2402# ifdef WIN32
d0063567 2403 SetLastError( SvIV(sv) );
e37778c2
NC		 2404# else
2405# ifdef OS2
38ab35f8 2406 os2_setsyserrno(SvIV(sv));
e37778c2 2407# else
d0063567 2408 /* will anyone ever use this? */
38ab35f8 2409 SETERRNO(SvIV(sv), 4);
048c1ddf
IZ		 2410# endif
2411# endif
22fae026 2412#endif
d0063567
DK		 2413 }
2414 else if (strEQ(mg->mg_ptr+1, "NCODING")) {
ef8d46e8 2415 SvREFCNT_dec(PL_encoding);
d0063567
DK		 2416 if (SvOK(sv) || SvGMAGICAL(sv)) {
2417 PL_encoding = newSVsv(sv);
2418 }
2419 else {
a0714e2c 2420 PL_encoding = NULL;
d0063567
DK		 2421 }
2422 }
2423 break;
79072805 2424 case '\006': /* ^F */
38ab35f8 2425 PL_maxsysfd = SvIV(sv);
79072805 2426 break;
a0d0e21e 2427 case '\010': /* ^H */
38ab35f8 2428 PL_hints = SvIV(sv);
a0d0e21e 2429 break;
9d116dd7 2430 case '\011': /* ^I */ /* NOT \t in EBCDIC */
43c5f42d 2431 Safefree(PL_inplace);
bd61b366 2432 PL_inplace = SvOK(sv) ? savesvpv(sv) : NULL;
da78da6e 2433 break;
28f23441 2434 case '\017': /* ^O */
ac27b0f5 2435 if (*(mg->mg_ptr+1) == '\0') {
43c5f42d 2436 Safefree(PL_osname);
bd61b366 2437 PL_osname = NULL;
3511154c
DM		 2438 if (SvOK(sv)) {
2439 TAINT_PROPER("assigning to $^O");
2e0de35c 2440 PL_osname = savesvpv(sv);
3511154c 2441 }
ac27b0f5
NIS		 2442 }
2443 else if (strEQ(mg->mg_ptr, "\017PEN")) {
8b850bd5
NC		 2444 STRLEN len;
2445 const char *const start = SvPV(sv, len);
b54fc2b6 2446 const char *out = (const char*)memchr(start, '\0', len);
8b850bd5 2447 SV *tmp;
8b850bd5
NC		 2448
2449
2450 PL_compiling.cop_hints |= HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT;
f747ebd6 2451 PL_hints |= HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT;
8b850bd5
NC		 2452
2453 /* Opening for input is more common than opening for output, so
2454 ensure that hints for input are sooner on linked list. */
59cd0e26 2455 tmp = out ? newSVpvn_flags(out + 1, start + len - out - 1,
f747ebd6
Z		 2456 SvUTF8(sv))
2457 : newSVpvs_flags("", SvUTF8(sv));
2458 (void)hv_stores(GvHV(PL_hintgv), "open>", tmp);
2459 mg_set(tmp);
8b850bd5 2460
f747ebd6
Z		 2461 tmp = newSVpvn_flags(start, out ? (STRLEN)(out - start) : len,
2462 SvUTF8(sv));
2463 (void)hv_stores(GvHV(PL_hintgv), "open<", tmp);
2464 mg_set(tmp);
ac27b0f5 2465 }
28f23441 2466 break;
79072805 2467 case '\020': /* ^P */
2fdbfb4d
AB		 2468 if (*remaining == '\0') { /* ^P */
2469 PL_perldb = SvIV(sv);
2470 if (PL_perldb && !PL_DBsingle)
2471 init_debugger();
2472 break;
2473 } else if (strEQ(remaining, "REMATCH")) { /* $^PREMATCH */
2474 goto do_prematch;
2475 } else if (strEQ(remaining, "OSTMATCH")) { /* $^POSTMATCH */
2476 goto do_postmatch;
2477 }
79072805 2478 case '\024': /* ^T */
88e89b8a 2479#ifdef BIG_TIME
6b88bc9c 2480 PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
88e89b8a 2481#else
38ab35f8 2482 PL_basetime = (Time_t)SvIV(sv);
88e89b8a 2483#endif
79072805 2484 break;
e07ea26a
NC		 2485 case '\025': /* ^UTF8CACHE */
2486 if (strEQ(mg->mg_ptr+1, "TF8CACHE")) {
2487 PL_utf8cache = (signed char) sv_2iv(sv);
2488 }
2489 break;
fde18df1 2490 case '\027': /* ^W & $^WARNING_BITS */
4438c4b7
JH		 2491 if (*(mg->mg_ptr+1) == '\0') {
2492 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
38ab35f8 2493 i = SvIV(sv);
ac27b0f5 2494 PL_dowarn = (PL_dowarn & ~G_WARN_ON)
0453d815 2495 | (i ? G_WARN_ON : G_WARN_OFF) ;
4438c4b7 2496 }
599cee73 2497 }
0a378802 2498 else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) {
4438c4b7 2499 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
d775746e
GS		 2500 if (!SvPOK(sv) && PL_localizing) {
2501 sv_setpvn(sv, WARN_NONEstring, WARNsize);
d3a7d8c7 2502 PL_compiling.cop_warnings = pWARN_NONE;
d775746e
GS		 2503 break;
2504 }
f4fc7782 2505 {
b5477537 2506 STRLEN len, i;
d3a7d8c7 2507 int accumulate = 0 ;
f4fc7782 2508 int any_fatals = 0 ;
b83604b4 2509 const char * const ptr = SvPV_const(sv, len) ;
f4fc7782
JH		 2510 for (i = 0 ; i < len ; ++i) {
2511 accumulate |= ptr[i] ;
2512 any_fatals |= (ptr[i] & 0xAA) ;
2513 }
4243c432
NC		 2514 if (!accumulate) {
2515 if (!specialWARN(PL_compiling.cop_warnings))
2516 PerlMemShared_free(PL_compiling.cop_warnings);
2517 PL_compiling.cop_warnings = pWARN_NONE;
2518 }
72dc9ed5
NC		 2519 /* Yuck. I can't see how to abstract this: */
2520 else if (isWARN_on(((STRLEN *)SvPV_nolen_const(sv)) - 1,
2521 WARN_ALL) && !any_fatals) {
4243c432
NC		 2522 if (!specialWARN(PL_compiling.cop_warnings))
2523 PerlMemShared_free(PL_compiling.cop_warnings);
f4fc7782
JH		 2524 PL_compiling.cop_warnings = pWARN_ALL;
2525 PL_dowarn |= G_WARN_ONCE ;
727405f8 2526 }
d3a7d8c7 2527 else {
72dc9ed5
NC		 2528 STRLEN len;
2529 const char *const p = SvPV_const(sv, len);
2530
2531 PL_compiling.cop_warnings
8ee4cf24 2532 = Perl_new_warnings_bitfield(aTHX_ PL_compiling.cop_warnings,
72dc9ed5
NC		 2533 p, len);
2534
d3a7d8c7
GS		 2535 if (isWARN_on(PL_compiling.cop_warnings, WARN_ONCE))
2536 PL_dowarn |= G_WARN_ONCE ;
2537 }
f4fc7782 2538
d3a7d8c7 2539 }
4438c4b7 2540 }
971a9dd3 2541 }
79072805
LW		 2542 break;
2543 case '.':
3280af22
NIS		 2544 if (PL_localizing) {
2545 if (PL_localizing == 1)
7766f137 2546 SAVESPTR(PL_last_in_gv);
748a9306 2547 }
3280af22 2548 else if (SvOK(sv) && GvIO(PL_last_in_gv))
632db599 2549 IoLINES(GvIOp(PL_last_in_gv)) = SvIV(sv);
79072805
LW		 2550 break;
2551 case '^':
099be4f1
DM		 2552 if (isGV_with_GP(PL_defoutgv)) {
2553 Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
2554 s = IoTOP_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv);
2555 IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO);
2556 }
79072805
LW		 2557 break;
2558 case '~':
099be4f1
DM		 2559 if (isGV_with_GP(PL_defoutgv)) {
2560 Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
2561 s = IoFMT_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv);
2562 IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO);
2563 }
79072805
LW		 2564 break;
2565 case '=':
099be4f1
DM		 2566 if (isGV_with_GP(PL_defoutgv))
2567 IoPAGE_LEN(GvIOp(PL_defoutgv)) = (SvIV(sv));
79072805
LW		 2568 break;
2569 case '-':
099be4f1
DM		 2570 if (isGV_with_GP(PL_defoutgv)) {
2571 IoLINES_LEFT(GvIOp(PL_defoutgv)) = (SvIV(sv));
2572 if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
2573 IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
2574 }
79072805
LW		 2575 break;
2576 case '%':
099be4f1
DM		 2577 if (isGV_with_GP(PL_defoutgv))
2578 IoPAGE(GvIOp(PL_defoutgv)) = (SvIV(sv));
79072805
LW		 2579 break;
2580 case '|':
4b65379b 2581 {
099be4f1 2582 IO * const io = GvIO(PL_defoutgv);
720f287d
AB		 2583 if(!io)
2584 break;
38ab35f8 2585 if ((SvIV(sv)) == 0)
4b65379b
CS		 2586 IoFLAGS(io) &= ~IOf_FLUSH;
2587 else {
2588 if (!(IoFLAGS(io) & IOf_FLUSH)) {
2589 PerlIO *ofp = IoOFP(io);
2590 if (ofp)
2591 (void)PerlIO_flush(ofp);
2592 IoFLAGS(io) |= IOf_FLUSH;
2593 }
2594 }
79072805
LW		 2595 }
2596 break;
79072805 2597 case '/':
3280af22 2598 SvREFCNT_dec(PL_rs);
8bfdd7d9 2599 PL_rs = newSVsv(sv);
79072805
LW		 2600 break;
2601 case '\\':
ef8d46e8 2602 SvREFCNT_dec(PL_ors_sv);
009c130f 2603 if (SvOK(sv) || SvGMAGICAL(sv)) {
7889fe52 2604 PL_ors_sv = newSVsv(sv);
009c130f 2605 }
e3c19b7b 2606 else {
a0714e2c 2607 PL_ors_sv = NULL;
e3c19b7b 2608 }
79072805 2609 break;
79072805 2610 case '[':
38ab35f8 2611 CopARYBASE_set(&PL_compiling, SvIV(sv));
79072805
LW		 2612 break;
2613 case '?':
ff0cee69 2614#ifdef COMPLEX_STATUS
6b88bc9c 2615 if (PL_localizing == 2) {
41cb7b2b 2616 SvUPGRADE(sv, SVt_PVLV);
6b88bc9c
GS		 2617 PL_statusvalue = LvTARGOFF(sv);
2618 PL_statusvalue_vms = LvTARGLEN(sv);
ff0cee69 2619 }
2620 else
2621#endif
2622#ifdef VMSISH_STATUS
2623 if (VMSISH_STATUS)
fb38d079 2624 STATUS_NATIVE_CHILD_SET((U32)SvIV(sv));
ff0cee69 2625 else
2626#endif
38ab35f8 2627 STATUS_UNIX_EXIT_SET(SvIV(sv));
79072805
LW		 2628 break;
2629 case '!':
93189314
JH		 2630 {
2631#ifdef VMS
2632# define PERL_VMS_BANG vaxc$errno
2633#else
2634# define PERL_VMS_BANG 0
2635#endif
91487cfc 2636 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
93189314
JH		 2637 (SvIV(sv) == EVMSERR) ? 4 : PERL_VMS_BANG);
2638 }
79072805
LW		 2639 break;
2640 case '<':
38ab35f8 2641 PL_uid = SvIV(sv);
3280af22
NIS		 2642 if (PL_delaymagic) {
2643 PL_delaymagic |= DM_RUID;
79072805
LW		 2644 break; /* don't do magic till later */
2645 }
2646#ifdef HAS_SETRUID
b28d0864 2647 (void)setruid((Uid_t)PL_uid);
79072805
LW		 2648#else
2649#ifdef HAS_SETREUID
3280af22 2650 (void)setreuid((Uid_t)PL_uid, (Uid_t)-1);
748a9306 2651#else
85e6fe83 2652#ifdef HAS_SETRESUID
b28d0864 2653 (void)setresuid((Uid_t)PL_uid, (Uid_t)-1, (Uid_t)-1);
79072805 2654#else
75870ed3 2655 if (PL_uid == PL_euid) { /* special case $< = $> */
2656#ifdef PERL_DARWIN
2657 /* workaround for Darwin's setuid peculiarity, cf [perl #24122] */
2658 if (PL_uid != 0 && PerlProc_getuid() == 0)
2659 (void)PerlProc_setuid(0);
2660#endif
b28d0864 2661 (void)PerlProc_setuid(PL_uid);
75870ed3 2662 } else {
d8eceb89 2663 PL_uid = PerlProc_getuid();
cea2e8a9 2664 Perl_croak(aTHX_ "setruid() not implemented");
a0d0e21e 2665 }
79072805
LW		 2666#endif
2667#endif
85e6fe83 2668#endif
d8eceb89 2669 PL_uid = PerlProc_getuid();
79072805
LW		 2670 break;
2671 case '>':
38ab35f8 2672 PL_euid = SvIV(sv);
3280af22
NIS		 2673 if (PL_delaymagic) {
2674 PL_delaymagic |= DM_EUID;
79072805
LW		 2675 break; /* don't do magic till later */
2676 }
2677#ifdef HAS_SETEUID
3280af22 2678 (void)seteuid((Uid_t)PL_euid);
79072805
LW		 2679#else
2680#ifdef HAS_SETREUID
b28d0864 2681 (void)setreuid((Uid_t)-1, (Uid_t)PL_euid);
85e6fe83
LW		 2682#else
2683#ifdef HAS_SETRESUID
6b88bc9c 2684 (void)setresuid((Uid_t)-1, (Uid_t)PL_euid, (Uid_t)-1);
79072805 2685#else
b28d0864
NIS		 2686 if (PL_euid == PL_uid) /* special case $> = $< */
2687 PerlProc_setuid(PL_euid);
a0d0e21e 2688 else {
e8ee3774 2689 PL_euid = PerlProc_geteuid();
cea2e8a9 2690 Perl_croak(aTHX_ "seteuid() not implemented");
a0d0e21e 2691 }
79072805
LW		 2692#endif
2693#endif
85e6fe83 2694#endif
d8eceb89 2695 PL_euid = PerlProc_geteuid();
79072805
LW		 2696 break;
2697 case '(':
38ab35f8 2698 PL_gid = SvIV(sv);
3280af22
NIS		 2699 if (PL_delaymagic) {
2700 PL_delaymagic |= DM_RGID;
79072805
LW		 2701 break; /* don't do magic till later */
2702 }
2703#ifdef HAS_SETRGID
b28d0864 2704 (void)setrgid((Gid_t)PL_gid);
79072805
LW		 2705#else
2706#ifdef HAS_SETREGID
3280af22 2707 (void)setregid((Gid_t)PL_gid, (Gid_t)-1);
85e6fe83
LW		 2708#else
2709#ifdef HAS_SETRESGID
b28d0864 2710 (void)setresgid((Gid_t)PL_gid, (Gid_t)-1, (Gid_t) 1);
79072805 2711#else
b28d0864
NIS		 2712 if (PL_gid == PL_egid) /* special case $( = $) */
2713 (void)PerlProc_setgid(PL_gid);
748a9306 2714 else {
d8eceb89 2715 PL_gid = PerlProc_getgid();
cea2e8a9 2716 Perl_croak(aTHX_ "setrgid() not implemented");
748a9306 2717 }
79072805
LW		 2718#endif
2719#endif
85e6fe83 2720#endif
d8eceb89 2721 PL_gid = PerlProc_getgid();
79072805
LW		 2722 break;
2723 case ')':
5cd24f17 2724#ifdef HAS_SETGROUPS
2725 {
b83604b4 2726 const char *p = SvPV_const(sv, len);
757f63d8 2727 Groups_t *gary = NULL;
fb4089e0 2728#ifdef _SC_NGROUPS_MAX
2729 int maxgrp = sysconf(_SC_NGROUPS_MAX);
2730
2731 if (maxgrp < 0)
2732 maxgrp = NGROUPS;
2733#else
2734 int maxgrp = NGROUPS;
2735#endif
757f63d8
SP		 2736
2737 while (isSPACE(*p))
2738 ++p;
2739 PL_egid = Atol(p);
fb4089e0 2740 for (i = 0; i < maxgrp; ++i) {
757f63d8
SP		 2741 while (*p && !isSPACE(*p))
2742 ++p;
2743 while (isSPACE(*p))
2744 ++p;
2745 if (!*p)
2746 break;
2747 if(!gary)
2748 Newx(gary, i + 1, Groups_t);
2749 else
2750 Renew(gary, i + 1, Groups_t);
2751 gary[i] = Atol(p);
2752 }
2753 if (i)
2754 (void)setgroups(i, gary);
f5a63d97 2755 Safefree(gary);
5cd24f17 2756 }
2757#else /* HAS_SETGROUPS */
38ab35f8 2758 PL_egid = SvIV(sv);
5cd24f17 2759#endif /* HAS_SETGROUPS */
3280af22
NIS		 2760 if (PL_delaymagic) {
2761 PL_delaymagic |= DM_EGID;
79072805
LW		 2762 break; /* don't do magic till later */
2763 }
2764#ifdef HAS_SETEGID
3280af22 2765 (void)setegid((Gid_t)PL_egid);
79072805
LW		 2766#else
2767#ifdef HAS_SETREGID
b28d0864 2768 (void)setregid((Gid_t)-1, (Gid_t)PL_egid);
85e6fe83
LW		 2769#else
2770#ifdef HAS_SETRESGID
b28d0864 2771 (void)setresgid((Gid_t)-1, (Gid_t)PL_egid, (Gid_t)-1);
79072805 2772#else
b28d0864
NIS		 2773 if (PL_egid == PL_gid) /* special case $) = $( */
2774 (void)PerlProc_setgid(PL_egid);
748a9306 2775 else {
d8eceb89 2776 PL_egid = PerlProc_getegid();
cea2e8a9 2777 Perl_croak(aTHX_ "setegid() not implemented");
748a9306 2778 }
79072805
LW		 2779#endif
2780#endif
85e6fe83 2781#endif
d8eceb89 2782 PL_egid = PerlProc_getegid();
79072805
LW		 2783 break;
2784 case ':':
2d8e6c8d 2785 PL_chopset = SvPV_force(sv,len);
79072805
LW		 2786 break;
2787 case '0':
e2975953 2788 LOCK_DOLLARZERO_MUTEX;
4bc88a62
PS		 2789#ifdef HAS_SETPROCTITLE
2790 /* The BSDs don't show the argv[] in ps(1) output, they
2791 * show a string from the process struct and provide
2792 * the setproctitle() routine to manipulate that. */
a2722ac9 2793 if (PL_origalen != 1) {
b83604b4 2794 s = SvPV_const(sv, len);
98b76f99 2795# if __FreeBSD_version > 410001
9aad2c0e 2796 /* The leading "-" removes the "perl: " prefix,
4bc88a62
PS		 2797 * but not the "(perl) suffix from the ps(1)
2798 * output, because that's what ps(1) shows if the
2799 * argv[] is modified. */
6f2ad931 2800 setproctitle("-%s", s);
9aad2c0e 2801# else /* old FreeBSDs, NetBSD, OpenBSD, anyBSD */
4bc88a62
PS		 2802 /* This doesn't really work if you assume that
2803 * $0 = 'foobar'; will wipe out 'perl' from the $0
2804 * because in ps(1) output the result will be like
2805 * sprintf("perl: %s (perl)", s)
2806 * I guess this is a security feature:
2807 * one (a user process) cannot get rid of the original name.
2808 * --jhi */
2809 setproctitle("%s", s);
2810# endif
2811 }
9d3968b2 2812#elif defined(__hpux) && defined(PSTAT_SETCMD)
a2722ac9 2813 if (PL_origalen != 1) {
17aa7f3d 2814 union pstun un;
b83604b4 2815 s = SvPV_const(sv, len);
6867be6d 2816 un.pst_command = (char *)s;
17aa7f3d
JH		 2817 pstat(PSTAT_SETCMD, un, len, 0, 0);
2818 }
9d3968b2 2819#else
2d2af554
GA		 2820 if (PL_origalen > 1) {
2821 /* PL_origalen is set in perl_parse(). */
2822 s = SvPV_force(sv,len);
2823 if (len >= (STRLEN)PL_origalen-1) {
2824 /* Longer than original, will be truncated. We assume that
2825 * PL_origalen bytes are available. */
2826 Copy(s, PL_origargv[0], PL_origalen-1, char);
2827 }
2828 else {
2829 /* Shorter than original, will be padded. */
235ac35d 2830#ifdef PERL_DARWIN
60777a0d
JH		 2831 /* Special case for Mac OS X: see [perl #38868] */
2832 const int pad = 0;
235ac35d 2833#else
8a89a4f1
MB		 2834 /* Is the space counterintuitive? Yes.
2835 * (You were expecting \0?)
2836 * Does it work? Seems to. (In Linux 2.4.20 at least.)
2837 * --jhi */
60777a0d 2838 const int pad = ' ';
235ac35d 2839#endif
60777a0d
JH		 2840 Copy(s, PL_origargv[0], len, char);
2841 PL_origargv[0][len] = 0;
2842 memset(PL_origargv[0] + len + 1,
2843 pad, PL_origalen - len - 1);
2d2af554
GA		 2844 }
2845 PL_origargv[0][PL_origalen-1] = 0;
2846 for (i = 1; i < PL_origargc; i++)
2847 PL_origargv[i] = 0;
7636ea95
AB		 2848#ifdef HAS_PRCTL_SET_NAME
2849 /* Set the legacy process name in addition to the POSIX name on Linux */
2850 if (prctl(PR_SET_NAME, (unsigned long)s, 0, 0, 0) != 0) {
2851 /* diag_listed_as: SKIPME */
2852 Perl_croak(aTHX_ "Can't set $0 with prctl(): %s", Strerror(errno));
2853 }
2854#endif
79072805 2855 }
9d3968b2 2856#endif
e2975953 2857 UNLOCK_DOLLARZERO_MUTEX;
79072805
LW		 2858 break;
2859 }
2860 return 0;
2861}
2862
2863I32
35a4481c 2864Perl_whichsig(pTHX_ const char *sig)
79072805 2865{
aadb217d 2866 register char* const* sigv;
7918f24d
NC		 2867
2868 PERL_ARGS_ASSERT_WHICHSIG;
96a5add6 2869 PERL_UNUSED_CONTEXT;
79072805 2870
aadb217d 2871 for (sigv = (char* const*)PL_sig_name; *sigv; sigv++)
79072805 2872 if (strEQ(sig,*sigv))
aadb217d 2873 return PL_sig_num[sigv - (char* const*)PL_sig_name];
79072805
LW		 2874#ifdef SIGCLD
2875 if (strEQ(sig,"CHLD"))
2876 return SIGCLD;
2877#endif
2878#ifdef SIGCHLD
2879 if (strEQ(sig,"CLD"))
2880 return SIGCHLD;
2881#endif
7f1236c0 2882 return -1;
79072805
LW		 2883}
2884
ecfc5424 2885Signal_t
1e82f5a6 2886#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
b6455c53 2887Perl_sighandler(int sig, siginfo_t *sip, void *uap PERL_UNUSED_DECL)
1e82f5a6
SH		 2888#else
2889Perl_sighandler(int sig)
2890#endif
79072805 2891{
1018e26f
NIS		 2892#ifdef PERL_GET_SIG_CONTEXT
2893 dTHXa(PERL_GET_SIG_CONTEXT);
71d280e3 2894#else
cea2e8a9 2895 dTHX;
71d280e3 2896#endif
79072805 2897 dSP;
a0714e2c
SS		 2898 GV *gv = NULL;
2899 SV *sv = NULL;
8772537c 2900 SV * const tSv = PL_Sv;
601f1833 2901 CV *cv = NULL;
533c011a 2902 OP *myop = PL_op;
84902520 2903 U32 flags = 0;
8772537c 2904 XPV * const tXpv = PL_Xpv;
71d280e3 2905
3280af22 2906 if (PL_savestack_ix + 15 <= PL_savestack_max)
84902520 2907 flags |= 1;
3280af22 2908 if (PL_markstack_ptr < PL_markstack_max - 2)
84902520 2909 flags |= 4;
3280af22 2910 if (PL_scopestack_ix < PL_scopestack_max - 3)
84902520
TB		 2911 flags |= 16;
2912
727405f8 2913 if (!PL_psig_ptr[sig]) {
99ef548b 2914 PerlIO_printf(Perl_error_log, "Signal SIG%s received, but no signal handler set.\n",
727405f8
NIS		 2915 PL_sig_name[sig]);
2916 exit(sig);
2917 }
ff0cee69 2918
84902520
TB		 2919 /* Max number of items pushed there is 3*n or 4. We cannot fix
2920 infinity, so we fix 4 (in fact 5): */
2921 if (flags & 1) {
3280af22 2922 PL_savestack_ix += 5; /* Protect save in progress. */
8772537c 2923 SAVEDESTRUCTOR_X(S_unwind_handler_stack, (void*)&flags);
84902520 2924 }
ac27b0f5 2925 if (flags & 4)
3280af22 2926 PL_markstack_ptr++; /* Protect mark. */
84902520 2927 if (flags & 16)
3280af22 2928 PL_scopestack_ix += 1;
84902520 2929 /* sv_2cv is too complicated, try a simpler variant first: */
ea726b52 2930 if (!SvROK(PL_psig_ptr[sig]) || !(cv = MUTABLE_CV(SvRV(PL_psig_ptr[sig])))
8772537c
AL		 2931 || SvTYPE(cv) != SVt_PVCV) {
2932 HV *st;
f2c0649b 2933 cv = sv_2cv(PL_psig_ptr[sig], &st, &gv, GV_ADD);
8772537c 2934 }
84902520 2935
a0d0e21e 2936 if (!cv || !CvROOT(cv)) {
a2a5de95
NC		 2937 Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL), "SIG%s handler \"%s\" not defined.\n",
2938 PL_sig_name[sig], (gv ? GvENAME(gv)
2939 : ((cv && CvGV(cv))
2940 ? GvENAME(CvGV(cv))
2941 : "__ANON__")));
00d579c5 2942 goto cleanup;
79072805
LW		 2943 }
2944
22c35a8c 2945 if(PL_psig_name[sig]) {
b37c2d43 2946 sv = SvREFCNT_inc_NN(PL_psig_name[sig]);
84902520 2947 flags |= 64;
df3728a2 2948#if !defined(PERL_IMPLICIT_CONTEXT)
27da23d5 2949 PL_sig_sv = sv;
df3728a2 2950#endif
84902520 2951 } else {
ff0cee69 2952 sv = sv_newmortal();
22c35a8c 2953 sv_setpv(sv,PL_sig_name[sig]);
88e89b8a 2954 }
e336de0d 2955
e788e7d3 2956 PUSHSTACKi(PERLSI_SIGNAL);
924508f0 2957 PUSHMARK(SP);
79072805 2958 PUSHs(sv);
8aad04aa
JH		 2959#if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
2960 {
2961 struct sigaction oact;
2962
2963 if (sigaction(sig, 0, &oact) == 0 && oact.sa_flags & SA_SIGINFO) {
8aad04aa
JH		 2964 if (sip) {
2965 HV *sih = newHV();
ad64d0ec 2966 SV *rv = newRV_noinc(MUTABLE_SV(sih));
8aad04aa
JH		 2967 /* The siginfo fields signo, code, errno, pid, uid,
2968 * addr, status, and band are defined by POSIX/SUSv3. */
85771703
NC		 2969 (void)hv_stores(sih, "signo", newSViv(sip->si_signo));
2970 (void)hv_stores(sih, "code", newSViv(sip->si_code));
79dec0f4 2971#if 0 /* XXX TODO: Configure scan for the existence of these, but even that does not help if the SA_SIGINFO is not implemented according to the spec. */
85771703
NC		 2972 hv_stores(sih, "errno", newSViv(sip->si_errno));
2973 hv_stores(sih, "status", newSViv(sip->si_status));
2974 hv_stores(sih, "uid", newSViv(sip->si_uid));
2975 hv_stores(sih, "pid", newSViv(sip->si_pid));
2976 hv_stores(sih, "addr", newSVuv(PTR2UV(sip->si_addr)));
2977 hv_stores(sih, "band", newSViv(sip->si_band));
79dec0f4 2978#endif
8aad04aa 2979 EXTEND(SP, 2);
ad64d0ec 2980 PUSHs(rv);
22f1178f 2981 mPUSHp((char *)sip, sizeof(*sip));
8aad04aa 2982 }
b4552a27 2983
8aad04aa
JH		 2984 }
2985 }
2986#endif
79072805 2987 PUTBACK;
a0d0e21e 2988
ad64d0ec 2989 call_sv(MUTABLE_SV(cv), G_DISCARD|G_EVAL);
79072805 2990
d3acc0f7 2991 POPSTACK;
1b266415 2992 if (SvTRUE(ERRSV)) {
1d615522 2993#ifndef PERL_MICRO
983dbef6 2994#ifdef HAS_SIGPROCMASK
1b266415
NIS		 2995 /* Handler "died", for example to get out of a restart-able read().
2996 * Before we re-do that on its behalf re-enable the signal which was
2997 * blocked by the system when we entered.
2998 */
2999 sigset_t set;
3000 sigemptyset(&set);
3001 sigaddset(&set,sig);
3002 sigprocmask(SIG_UNBLOCK, &set, NULL);
3003#else
3004 /* Not clear if this will work */
3005 (void)rsignal(sig, SIG_IGN);
5c1546dc 3006 (void)rsignal(sig, PL_csighandlerp);
1b266415 3007#endif
1d615522 3008#endif /* !PERL_MICRO */
c5df3096 3009 die_sv(ERRSV);
1b266415 3010 }
00d579c5 3011cleanup:
84902520 3012 if (flags & 1)
3280af22 3013 PL_savestack_ix -= 8; /* Unprotect save in progress. */
ac27b0f5 3014 if (flags & 4)
3280af22 3015 PL_markstack_ptr--;
84902520 3016 if (flags & 16)
3280af22 3017 PL_scopestack_ix -= 1;
84902520
TB		 3018 if (flags & 64)
3019 SvREFCNT_dec(sv);
533c011a 3020 PL_op = myop; /* Apparently not needed... */
ac27b0f5 3021
3280af22
NIS		 3022 PL_Sv = tSv; /* Restore global temporaries. */
3023 PL_Xpv = tXpv;
53bb94e2 3024 return;
79072805 3025}
4e35701f
NIS		 3026
3027
51371543 3028static void
8772537c 3029S_restore_magic(pTHX_ const void *p)
51371543 3030{
97aff369 3031 dVAR;
8772537c
AL		 3032 MGS* const mgs = SSPTR(PTR2IV(p), MGS*);
3033 SV* const sv = mgs->mgs_sv;
51371543
GS		 3034
3035 if (!sv)
3036 return;
3037
3038 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv))
3039 {
f8c7b90f 3040#ifdef PERL_OLD_COPY_ON_WRITE
f9701176
NC		 3041 /* While magic was saved (and off) sv_setsv may well have seen
3042 this SV as a prime candidate for COW. */
3043 if (SvIsCOW(sv))
e424a81e 3044 sv_force_normal_flags(sv, 0);
f9701176
NC		 3045#endif
3046
f9c6fee5
CS		 3047 if (mgs->mgs_readonly)
3048 SvREADONLY_on(sv);
3049 if (mgs->mgs_magical)
3050 SvFLAGS(sv) |= mgs->mgs_magical;
51371543
GS		 3051 else
3052 mg_magical(sv);
2b77b520
YST		 3053 if (SvGMAGICAL(sv)) {
3054 /* downgrade public flags to private,
3055 and discard any other private flags */
3056
10edeb5d
JH		 3057 const U32 pubflags = SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK);
3058 if (pubflags) {
3059 SvFLAGS(sv) &= ~( pubflags | (SVp_IOK|SVp_NOK|SVp_POK) );
3060 SvFLAGS(sv) |= ( pubflags << PRIVSHIFT );
2b77b520
YST		 3061 }
3062 }
51371543
GS		 3063 }
3064
3065 mgs->mgs_sv = NULL; /* mark the MGS structure as restored */
3066
3067 /* If we're still on top of the stack, pop us off. (That condition
3068 * will be satisfied if restore_magic was called explicitly, but *not*
3069 * if it's being called via leave_scope.)
3070 * The reason for doing this is that otherwise, things like sv_2cv()
3071 * may leave alloc gunk on the savestack, and some code
3072 * (e.g. sighandler) doesn't expect that...
3073 */
3074 if (PL_savestack_ix == mgs->mgs_ss_ix)
3075 {
1be36ce0
NC		 3076 UV popval = SSPOPUV;
3077 assert(popval == SAVEt_DESTRUCTOR_X);
51371543 3078 PL_savestack_ix -= 2;
1be36ce0
NC		 3079 popval = SSPOPUV;
3080 assert((popval & SAVE_MASK) == SAVEt_ALLOC);
3081 PL_savestack_ix -= popval >> SAVE_TIGHT_SHIFT;
51371543
GS		 3082 }
3083
3084}
3085
3086static void
8772537c 3087S_unwind_handler_stack(pTHX_ const void *p)
51371543 3088{
27da23d5 3089 dVAR;
e1ec3a88 3090 const U32 flags = *(const U32*)p;
51371543 3091
7918f24d
NC		 3092 PERL_ARGS_ASSERT_UNWIND_HANDLER_STACK;
3093
51371543
GS		 3094 if (flags & 1)
3095 PL_savestack_ix -= 5; /* Unprotect save in progress. */
df3728a2 3096#if !defined(PERL_IMPLICIT_CONTEXT)
51371543 3097 if (flags & 64)
27da23d5 3098 SvREFCNT_dec(PL_sig_sv);
df3728a2 3099#endif
51371543 3100}
1018e26f 3101
66610fdd 3102/*
b3ca2e83
NC		 3103=for apidoc magic_sethint
3104
3105Triggered by a store to %^H, records the key/value pair to
c28fe1ec
NC		 3106C<PL_compiling.cop_hints_hash>. It is assumed that hints aren't storing
3107anything that would need a deep copy. Maybe we should warn if we find a
3108reference.
b3ca2e83
NC		 3109
3110=cut
3111*/
3112int
3113Perl_magic_sethint(pTHX_ SV *sv, MAGIC *mg)
3114{
3115 dVAR;
ad64d0ec 3116 SV *key = (mg->mg_len == HEf_SVKEY) ? MUTABLE_SV(mg->mg_ptr)
59cd0e26 3117 : newSVpvn_flags(mg->mg_ptr, mg->mg_len, SVs_TEMP);
b3ca2e83 3118
7918f24d
NC		 3119 PERL_ARGS_ASSERT_MAGIC_SETHINT;
3120
e6e3e454
NC		 3121 /* mg->mg_obj isn't being used. If needed, it would be possible to store
3122 an alternative leaf in there, with PL_compiling.cop_hints being used if
3123 it's NULL. If needed for threads, the alternative could lock a mutex,
3124 or take other more complex action. */
3125
5b9c0671
NC		 3126 /* Something changed in %^H, so it will need to be restored on scope exit.
3127 Doing this here saves a lot of doing it manually in perl code (and
3128 forgetting to do it, and consequent subtle errors. */
3129 PL_hints |= HINT_LOCALIZE_HH;
c28fe1ec 3130 PL_compiling.cop_hints_hash
fc92a12d 3131 = Perl_refcounted_he_new(aTHX_ PL_compiling.cop_hints_hash, key, sv);
b3ca2e83
NC		 3132 return 0;
3133}
3134
3135/*
f175cff5 3136=for apidoc magic_clearhint
b3ca2e83 3137
c28fe1ec
NC		 3138Triggered by a delete from %^H, records the key to
3139C<PL_compiling.cop_hints_hash>.
b3ca2e83
NC		 3140
3141=cut
3142*/
3143int
3144Perl_magic_clearhint(pTHX_ SV *sv, MAGIC *mg)
3145{
3146 dVAR;
7918f24d
NC		 3147
3148 PERL_ARGS_ASSERT_MAGIC_CLEARHINT;
f5a63d97
AL		 3149 PERL_UNUSED_ARG(sv);
3150
b3ca2e83
NC		 3151 assert(mg->mg_len == HEf_SVKEY);
3152
b3f24c00
MHM		 3153 PERL_UNUSED_ARG(sv);
3154
5b9c0671 3155 PL_hints |= HINT_LOCALIZE_HH;
c28fe1ec
NC		 3156 PL_compiling.cop_hints_hash
3157 = Perl_refcounted_he_new(aTHX_ PL_compiling.cop_hints_hash,
ad64d0ec 3158 MUTABLE_SV(mg->mg_ptr), &PL_sv_placeholder);
b3ca2e83
NC		 3159 return 0;
3160}
3161
3162/*
f747ebd6
Z		 3163=for apidoc magic_clearhints
3164
3165Triggered by clearing %^H, resets C<PL_compiling.cop_hints_hash>.
3166
3167=cut
3168*/
3169int
3170Perl_magic_clearhints(pTHX_ SV *sv, MAGIC *mg)
3171{
3172 PERL_ARGS_ASSERT_MAGIC_CLEARHINTS;
3173 PERL_UNUSED_ARG(sv);
3174 PERL_UNUSED_ARG(mg);
3175 if (PL_compiling.cop_hints_hash) {
3176 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
3177 PL_compiling.cop_hints_hash = NULL;
3178 }
3179 return 0;
3180}
3181
3182/*
66610fdd
RGS		 3183 * Local variables:
3184 * c-indentation-style: bsd
3185 * c-basic-offset: 4
3186 * indent-tabs-mode: t
3187 * End:
3188 *
37442d52
RGS		 3189 * ex: set ts=8 sts=4 sw=4 noet:
3190 */
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