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a0d0e21e 1/* gv.c
79072805 2 *
1129b882 3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
67fbe0e1 4 * 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 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/*
12 * 'Mercy!' cried Gandalf. 'If the giving of information is to be the cure
4ac71550 13 * of your inquisitiveness, I shall spend all the rest of my days in answering
a0d0e21e
LW		 14 * you. What more do you want to know?'
15 * 'The names of all the stars, and of all living things, and the whole
16 * history of Middle-earth and Over-heaven and of the Sundering Seas,'
17 * laughed Pippin.
4ac71550 18 *
cdad3b53 19 * [p.599 of _The Lord of the Rings_, III/xi: "The Palantír"]
79072805
LW		 20 */
21
ccfc67b7
JH		 22/*
23=head1 GV Functions
166f8a29
DM		 24
25A GV is a structure which corresponds to to a Perl typeglob, ie *foo.
26It is a structure that holds a pointer to a scalar, an array, a hash etc,
27corresponding to $foo, @foo, %foo.
28
29GVs are usually found as values in stashes (symbol table hashes) where
30Perl stores its global variables.
31
32=cut
ccfc67b7
JH		 33*/
34
79072805 35#include "EXTERN.h"
864dbfa3 36#define PERL_IN_GV_C
79072805 37#include "perl.h"
8261f8eb 38#include "overload.c"
4aaa4757 39#include "keywords.h"
79072805 40
f54cb97a
AL		 41static const char S_autoload[] = "AUTOLOAD";
42static const STRLEN S_autolen = sizeof(S_autoload)-1;
5c7983e5 43
c69033f2 44GV *
d5713896 45Perl_gv_add_by_type(pTHX_ GV *gv, svtype type)
c69033f2 46{
d5713896 47 SV **where;
7918f24d 48
13be902c
FC		 49 if (
50 !gv
51 || (
52 SvTYPE((const SV *)gv) != SVt_PVGV
53 && SvTYPE((const SV *)gv) != SVt_PVLV
54 )
55 ) {
bb85b28a
NC		 56 const char *what;
57 if (type == SVt_PVIO) {
58 /*
59 * if it walks like a dirhandle, then let's assume that
60 * this is a dirhandle.
61 */
332c2eac 62 what = OP_IS_DIRHOP(PL_op->op_type) ?
bb85b28a
NC		 63 "dirhandle" : "filehandle";
64 /* diag_listed_as: Bad symbol for filehandle */
65 } else if (type == SVt_PVHV) {
66 what = "hash";
67 } else {
68 what = type == SVt_PVAV ? "array" : "scalar";
69 }
70 Perl_croak(aTHX_ "Bad symbol for %s", what);
71 }
d5713896
NC		 72
73 if (type == SVt_PVHV) {
74 where = (SV **)&GvHV(gv);
75 } else if (type == SVt_PVAV) {
76 where = (SV **)&GvAV(gv);
bb85b28a
NC		 77 } else if (type == SVt_PVIO) {
78 where = (SV **)&GvIOp(gv);
d5713896
NC		 79 } else {
80 where = &GvSV(gv);
81 }
7918f24d 82
d5713896
NC		 83 if (!*where)
84 *where = newSV_type(type);
79072805
LW		 85 return gv;
86}
87
88GV *
864dbfa3 89Perl_gv_fetchfile(pTHX_ const char *name)
79072805 90{
7918f24d 91 PERL_ARGS_ASSERT_GV_FETCHFILE;
d9095cec
NC		 92 return gv_fetchfile_flags(name, strlen(name), 0);
93}
94
95GV *
96Perl_gv_fetchfile_flags(pTHX_ const char *const name, const STRLEN namelen,
97 const U32 flags)
98{
97aff369 99 dVAR;
4116122e 100 char smallbuf[128];
53d95988 101 char *tmpbuf;
d9095cec 102 const STRLEN tmplen = namelen + 2;
79072805
LW		 103 GV *gv;
104
7918f24d 105 PERL_ARGS_ASSERT_GV_FETCHFILE_FLAGS;
d9095cec
NC		 106 PERL_UNUSED_ARG(flags);
107
1d7c1841 108 if (!PL_defstash)
a0714e2c 109 return NULL;
1d7c1841 110
d9095cec 111 if (tmplen <= sizeof smallbuf)
53d95988
CS		 112 tmpbuf = smallbuf;
113 else
798b63bc 114 Newx(tmpbuf, tmplen, char);
0ac0412a 115 /* This is where the debugger's %{"::_<$filename"} hash is created */
53d95988
CS		 116 tmpbuf[0] = '_';
117 tmpbuf[1] = '<';
d9095cec
NC		 118 memcpy(tmpbuf + 2, name, namelen);
119 gv = *(GV**)hv_fetch(PL_defstash, tmpbuf, tmplen, TRUE);
1d7c1841 120 if (!isGV(gv)) {
d9095cec 121 gv_init(gv, PL_defstash, tmpbuf, tmplen, FALSE);
c69033f2 122#ifdef PERL_DONT_CREATE_GVSV
d9095cec 123 GvSV(gv) = newSVpvn(name, namelen);
c69033f2 124#else
d9095cec 125 sv_setpvn(GvSV(gv), name, namelen);
c69033f2 126#endif
1d7c1841 127 }
5a9a79a4
FC		 128 if ((PERLDB_LINE || PERLDB_SAVESRC) && !GvAV(gv))
129 hv_magic(GvHVn(gv_AVadd(gv)), NULL, PERL_MAGIC_dbfile);
53d95988
CS		 130 if (tmpbuf != smallbuf)
131 Safefree(tmpbuf);
79072805
LW		 132 return gv;
133}
134
62d55b22
NC		 135/*
136=for apidoc gv_const_sv
137
138If C<gv> is a typeglob whose subroutine entry is a constant sub eligible for
139inlining, or C<gv> is a placeholder reference that would be promoted to such
140a typeglob, then returns the value returned by the sub. Otherwise, returns
141NULL.
142
143=cut
144*/
145
146SV *
147Perl_gv_const_sv(pTHX_ GV *gv)
148{
7918f24d
NC		 149 PERL_ARGS_ASSERT_GV_CONST_SV;
150
62d55b22
NC		 151 if (SvTYPE(gv) == SVt_PVGV)
152 return cv_const_sv(GvCVu(gv));
153 return SvROK(gv) ? SvRV(gv) : NULL;
154}
155
12816592
NC		 156GP *
157Perl_newGP(pTHX_ GV *const gv)
158{
159 GP *gp;
19bad673
NC		 160 U32 hash;
161#ifdef USE_ITHREADS
1df5f7c1
NC		 162 const char *const file
163 = (PL_curcop && CopFILE(PL_curcop)) ? CopFILE(PL_curcop) : "";
19bad673
NC		 164 const STRLEN len = strlen(file);
165#else
166 SV *const temp_sv = CopFILESV(PL_curcop);
167 const char *file;
168 STRLEN len;
169
7918f24d
NC		 170 PERL_ARGS_ASSERT_NEWGP;
171
19bad673
NC		 172 if (temp_sv) {
173 file = SvPVX(temp_sv);
174 len = SvCUR(temp_sv);
175 } else {
176 file = "";
177 len = 0;
178 }
179#endif
f4890806
NC		 180
181 PERL_HASH(hash, file, len);
182
12816592
NC		 183 Newxz(gp, 1, GP);
184
185#ifndef PERL_DONT_CREATE_GVSV
b5c2dcb8 186 gp->gp_sv = newSV(0);
12816592
NC		 187#endif
188
1df5f7c1 189 gp->gp_line = PL_curcop ? CopLINE(PL_curcop) : 0;
12816592
NC		 190 /* XXX Ideally this cast would be replaced with a change to const char*
191 in the struct. */
f4890806 192 gp->gp_file_hek = share_hek(file, len, hash);
12816592
NC		 193 gp->gp_egv = gv;
194 gp->gp_refcnt = 1;
195
196 return gp;
197}
198
803f2748
DM		 199/* Assign CvGV(cv) = gv, handling weak references.
200 * See also S_anonymise_cv_maybe */
201
202void
203Perl_cvgv_set(pTHX_ CV* cv, GV* gv)
204{
205 GV * const oldgv = CvGV(cv);
206 PERL_ARGS_ASSERT_CVGV_SET;
207
208 if (oldgv == gv)
209 return;
210
211 if (oldgv) {
cfc1e951 212 if (CvCVGV_RC(cv)) {
803f2748 213 SvREFCNT_dec(oldgv);
cfc1e951
DM		 214 CvCVGV_RC_off(cv);
215 }
803f2748 216 else {
803f2748
DM		 217 sv_del_backref(MUTABLE_SV(oldgv), MUTABLE_SV(cv));
218 }
219 }
220
b3f91e91 221 SvANY(cv)->xcv_gv = gv;
c794ca97 222 assert(!CvCVGV_RC(cv));
803f2748
DM		 223
224 if (!gv)
225 return;
226
c794ca97
DM		 227 if (isGV_with_GP(gv) && GvGP(gv) && (GvCV(gv) == cv || GvFORM(gv) == cv))
228 Perl_sv_add_backref(aTHX_ MUTABLE_SV(gv), MUTABLE_SV(cv));
229 else {
cfc1e951 230 CvCVGV_RC_on(cv);
803f2748
DM		 231 SvREFCNT_inc_simple_void_NN(gv);
232 }
803f2748
DM		 233}
234
c68d9564
Z		 235/* Assign CvSTASH(cv) = st, handling weak references. */
236
237void
238Perl_cvstash_set(pTHX_ CV *cv, HV *st)
239{
240 HV *oldst = CvSTASH(cv);
241 PERL_ARGS_ASSERT_CVSTASH_SET;
242 if (oldst == st)
243 return;
244 if (oldst)
245 sv_del_backref(MUTABLE_SV(oldst), MUTABLE_SV(cv));
246 SvANY(cv)->xcv_stash = st;
247 if (st)
248 Perl_sv_add_backref(aTHX_ MUTABLE_SV(st), MUTABLE_SV(cv));
249}
803f2748 250
e1104062
FC		 251/*
252=for apidoc gv_init_pvn
253
254Converts a scalar into a typeglob. This is an incoercible typeglob;
255assigning a reference to it will assign to one of its slots, instead of
256overwriting it as happens with typeglobs created by SvSetSV. Converting
257any scalar that is SvOK() may produce unpredictable results and is reserved
258for perl's internal use.
259
260C<gv> is the scalar to be converted.
261
262C<stash> is the parent stash/package, if any.
263
04ec7e59
FC		 264C<name> and C<len> give the name. The name must be unqualified;
265that is, it must not include the package name. If C<gv> is a
e1104062
FC		 266stash element, it is the caller's responsibility to ensure that the name
267passed to this function matches the name of the element. If it does not
268match, perl's internal bookkeeping will get out of sync.
269
04ec7e59
FC		 270C<flags> can be set to SVf_UTF8 if C<name> is a UTF8 string, or
271the return value of SvUTF8(sv). It can also take the
272GV_ADDMULTI flag, which means to pretend that the GV has been
e1104062
FC		 273seen before (i.e., suppress "Used once" warnings).
274
275=for apidoc gv_init
276
277The old form of gv_init_pvn(). It does not work with UTF8 strings, as it
04ec7e59
FC		 278has no flags parameter. If the C<multi> parameter is set, the
279GV_ADDMULTI flag will be passed to gv_init_pvn().
e1104062
FC		 280
281=for apidoc gv_init_pv
282
283Same as gv_init_pvn(), but takes a nul-terminated string for the name
284instead of separate char * and length parameters.
285
286=for apidoc gv_init_sv
287
288Same as gv_init_pvn(), but takes an SV * for the name instead of separate
289char * and length parameters. C<flags> is currently unused.
290
291=cut
292*/
293
463ee0b2 294void
04ec7e59 295Perl_gv_init_sv(pTHX_ GV *gv, HV *stash, SV* namesv, U32 flags)
e6066781
BF		 296{
297 char *namepv;
298 STRLEN namelen;
299 PERL_ARGS_ASSERT_GV_INIT_SV;
300 namepv = SvPV(namesv, namelen);
301 if (SvUTF8(namesv))
302 flags |= SVf_UTF8;
04ec7e59 303 gv_init_pvn(gv, stash, namepv, namelen, flags);
e6066781
BF		 304}
305
306void
04ec7e59 307Perl_gv_init_pv(pTHX_ GV *gv, HV *stash, const char *name, U32 flags)
e6066781
BF		 308{
309 PERL_ARGS_ASSERT_GV_INIT_PV;
04ec7e59 310 gv_init_pvn(gv, stash, name, strlen(name), flags);
e6066781
BF		 311}
312
313void
04ec7e59 314Perl_gv_init_pvn(pTHX_ GV *gv, HV *stash, const char *name, STRLEN len, U32 flags)
463ee0b2 315{
27da23d5 316 dVAR;
3b6733bf
NC		 317 const U32 old_type = SvTYPE(gv);
318 const bool doproto = old_type > SVt_NULL;
f9509170
FC		 319 char * const proto = (doproto && SvPOK(gv))
320 ? (SvIsCOW(gv) && (sv_force_normal((SV *)gv), 0), SvPVX(gv))
321 : NULL;
49a54bbe 322 const STRLEN protolen = proto ? SvCUR(gv) : 0;
e0260a5b 323 const U32 proto_utf8 = proto ? SvUTF8(gv) : 0;
756cb477 324 SV *const has_constant = doproto && SvROK(gv) ? SvRV(gv) : NULL;
1ccdb730 325 const U32 exported_constant = has_constant ? SvPCS_IMPORTED(gv) : 0;
756cb477 326
e6066781 327 PERL_ARGS_ASSERT_GV_INIT_PVN;
756cb477
NC		 328 assert (!(proto && has_constant));
329
330 if (has_constant) {
5c1f4d79
NC		 331 /* The constant has to be a simple scalar type. */
332 switch (SvTYPE(has_constant)) {
333 case SVt_PVAV:
334 case SVt_PVHV:
335 case SVt_PVCV:
336 case SVt_PVFM:
337 case SVt_PVIO:
338 Perl_croak(aTHX_ "Cannot convert a reference to %s to typeglob",
339 sv_reftype(has_constant, 0));
42d0e0b7 340 default: NOOP;
5c1f4d79 341 }
756cb477
NC		 342 SvRV_set(gv, NULL);
343 SvROK_off(gv);
344 }
463ee0b2 345
3b6733bf
NC		 346
347 if (old_type < SVt_PVGV) {
348 if (old_type >= SVt_PV)
349 SvCUR_set(gv, 0);
ad64d0ec 350 sv_upgrade(MUTABLE_SV(gv), SVt_PVGV);
3b6733bf 351 }
55d729e4
GS		 352 if (SvLEN(gv)) {
353 if (proto) {
f880fe2f 354 SvPV_set(gv, NULL);
b162af07 355 SvLEN_set(gv, 0);
55d729e4
GS		 356 SvPOK_off(gv);
357 } else
94010e71 358 Safefree(SvPVX_mutable(gv));
55d729e4 359 }
2e5b91de
NC		 360 SvIOK_off(gv);
361 isGV_with_GP_on(gv);
12816592 362
c43ae56f 363 GvGP_set(gv, Perl_newGP(aTHX_ gv));
e15faf7d
NC		 364 GvSTASH(gv) = stash;
365 if (stash)
ad64d0ec 366 Perl_sv_add_backref(aTHX_ MUTABLE_SV(stash), MUTABLE_SV(gv));
04f3bf56 367 gv_name_set(gv, name, len, GV_ADD | ( flags & SVf_UTF8 ? SVf_UTF8 : 0 ));
04ec7e59
FC		 368 if (flags & GV_ADDMULTI || doproto) /* doproto means it */
369 GvMULTI_on(gv); /* _was_ mentioned */
55d729e4 370 if (doproto) { /* Replicate part of newSUB here. */
e3d2b9e7 371 CV *cv;
55d729e4 372 ENTER;
756cb477
NC		 373 if (has_constant) {
374 /* newCONSTSUB takes ownership of the reference from us. */
e38acfd7 375 cv = newCONSTSUB_flags(stash, name, len, flags, has_constant);
75bd28cf
FC		 376 /* In case op.c:S_process_special_blocks stole it: */
377 if (!GvCV(gv))
c43ae56f 378 GvCV_set(gv, (CV *)SvREFCNT_inc_simple_NN(cv));
439cdf38 379 assert(GvCV(gv) == cv); /* newCONSTSUB should have set this */
1ccdb730
NC		 380 /* If this reference was a copy of another, then the subroutine
381 must have been "imported", by a Perl space assignment to a GV
382 from a reference to CV. */
383 if (exported_constant)
384 GvIMPORTED_CV_on(gv);
756cb477 385 } else {
756cb477 386 (void) start_subparse(0,0); /* Create empty CV in compcv. */
e3d2b9e7 387 cv = PL_compcv;
c43ae56f 388 GvCV_set(gv,cv);
756cb477 389 }
55d729e4
GS		 390 LEAVE;
391
e1a479c5 392 mro_method_changed_in(GvSTASH(gv)); /* sub Foo::bar($) { (shift) } sub ASDF::baz($); *ASDF::baz = \&Foo::bar */
b3f91e91 393 CvGV_set(cv, gv);
e3d2b9e7 394 CvFILE_set_from_cop(cv, PL_curcop);
c68d9564 395 CvSTASH_set(cv, PL_curstash);
55d729e4 396 if (proto) {
e3d2b9e7 397 sv_usepvn_flags(MUTABLE_SV(cv), proto, protolen,
49a54bbe 398 SV_HAS_TRAILING_NUL);
e0260a5b 399 if ( proto_utf8 ) SvUTF8_on(MUTABLE_SV(cv));
55d729e4
GS		 400 }
401 }
463ee0b2
LW		 402}
403
76e3520e 404STATIC void
e6066781 405S_gv_init_svtype(pTHX_ GV *gv, const svtype sv_type)
a0d0e21e 406{
e6066781 407 PERL_ARGS_ASSERT_GV_INIT_SVTYPE;
7918f24d 408
a0d0e21e
LW		 409 switch (sv_type) {
410 case SVt_PVIO:
411 (void)GvIOn(gv);
412 break;
413 case SVt_PVAV:
414 (void)GvAVn(gv);
415 break;
416 case SVt_PVHV:
417 (void)GvHVn(gv);
418 break;
c69033f2
NC		 419#ifdef PERL_DONT_CREATE_GVSV
420 case SVt_NULL:
421 case SVt_PVCV:
422 case SVt_PVFM:
e654831b 423 case SVt_PVGV:
c69033f2
NC		 424 break;
425 default:
dbdce04c
NC		 426 if(GvSVn(gv)) {
427 /* Work round what appears to be a bug in Sun C++ 5.8 2005/10/13
428 If we just cast GvSVn(gv) to void, it ignores evaluating it for
429 its side effect */
430 }
c69033f2 431#endif
a0d0e21e
LW		 432 }
433}
434
0f8d4b5e
FC		 435static void core_xsub(pTHX_ CV* cv);
436
437static GV *
438S_maybe_add_coresub(pTHX_ HV * const stash, GV *gv,
439 const char * const name, const STRLEN len,
440 const char * const fullname, STRLEN const fullen)
441{
442 const int code = keyword(name, len, 1);
443 static const char file[] = __FILE__;
97021f77 444 CV *cv, *oldcompcv = NULL;
0f8d4b5e
FC		 445 int opnum = 0;
446 SV *opnumsv;
447 bool ampable = TRUE; /* &{}-able */
97021f77
FC		 448 COP *oldcurcop = NULL;
449 yy_parser *oldparser = NULL;
450 I32 oldsavestack_ix = 0;
0f8d4b5e
FC		 451
452 assert(gv || stash);
453 assert(name);
454 assert(stash || fullname);
455
456 if (!fullname && !HvENAME(stash)) return NULL; /* pathological case
457 that would require
458 inlining newATTRSUB */
459 if (code >= 0) return NULL; /* not overridable */
460 switch (-code) {
461 /* no support for \&CORE::infix;
462 no support for funcs that take labels, as their parsing is
463 weird */
464 case KEY_and: case KEY_cmp: case KEY_CORE: case KEY_dump:
465 case KEY_eq: case KEY_ge:
466 case KEY_gt: case KEY_le: case KEY_lt: case KEY_ne:
467 case KEY_or: case KEY_x: case KEY_xor:
468 return NULL;
469 case KEY_chdir:
470 case KEY_chomp: case KEY_chop:
471 case KEY_each: case KEY_eof: case KEY_exec:
472 case KEY_keys:
473 case KEY_lstat:
474 case KEY_pop:
475 case KEY_push:
476 case KEY_shift:
477 case KEY_splice:
478 case KEY_stat:
479 case KEY_system:
480 case KEY_truncate: case KEY_unlink:
481 case KEY_unshift:
482 case KEY_values:
483 ampable = FALSE;
484 }
485 if (!gv) {
486 gv = (GV *)newSV(0);
487 gv_init(gv, stash, name, len, TRUE);
488 }
489 if (ampable) {
490 ENTER;
491 oldcurcop = PL_curcop;
492 oldparser = PL_parser;
493 lex_start(NULL, NULL, 0);
494 oldcompcv = PL_compcv;
495 PL_compcv = NULL; /* Prevent start_subparse from setting
496 CvOUTSIDE. */
497 oldsavestack_ix = start_subparse(FALSE,0);
498 cv = PL_compcv;
499 }
500 else {
501 /* Avoid calling newXS, as it calls us, and things start to
502 get hairy. */
503 cv = MUTABLE_CV(newSV_type(SVt_PVCV));
504 GvCV_set(gv,cv);
505 GvCVGEN(gv) = 0;
506 mro_method_changed_in(GvSTASH(gv));
507 CvISXSUB_on(cv);
508 CvXSUB(cv) = core_xsub;
509 }
510 CvGV_set(cv, gv); /* This stops new ATTRSUB from setting CvFILE
511 from PL_curcop. */
512 (void)gv_fetchfile(file);
513 CvFILE(cv) = (char *)file;
514 /* XXX This is inefficient, as doing things this order causes
515 a prototype check in newATTRSUB. But we have to do
516 it this order as we need an op number before calling
517 new ATTRSUB. */
518 (void)core_prototype((SV *)cv, name, code, &opnum);
73c02f15
FC		 519 if (stash && (fullname || !fullen))
520 (void)hv_store(stash,name,len,(SV *)gv,0);
0f8d4b5e
FC		 521 if (ampable) {
522 SV *tmpstr;
523 CvLVALUE_on(cv);
524 if (!fullname) {
525 tmpstr = newSVhek(HvENAME_HEK(stash));
526 sv_catpvs(tmpstr, "::");
527 sv_catpvn(tmpstr,name,len);
528 }
529 else tmpstr = newSVpvn_share(fullname,fullen,0);
530 newATTRSUB(oldsavestack_ix,
531 newSVOP(OP_CONST, 0, tmpstr),
532 NULL,NULL,
533 coresub_op(
534 opnum
535 ? newSVuv((UV)opnum)
536 : newSVpvn(name,len),
537 code, opnum
538 )
539 );
540 assert(GvCV(gv) == cv);
541 if (opnum != OP_VEC && opnum != OP_SUBSTR)
542 CvLVALUE_off(cv); /* Now *that* was a neat trick. */
543 LEAVE;
544 PL_parser = oldparser;
545 PL_curcop = oldcurcop;
546 PL_compcv = oldcompcv;
547 }
548 opnumsv = opnum ? newSVuv((UV)opnum) : (SV *)NULL;
549 cv_set_call_checker(
550 cv, Perl_ck_entersub_args_core, opnumsv ? opnumsv : (SV *)cv
551 );
552 SvREFCNT_dec(opnumsv);
553 return gv;
554}
555
954c1994 556/*
6c53d59b
FC		 557=for apidoc gv_fetchmeth
558
559Like L</gv_fetchmeth_pvn>, but lacks a flags parameter.
560
e6919483
BF		 561=for apidoc gv_fetchmeth_sv
562
563Exactly like L</gv_fetchmeth_pvn>, but takes the name string in the form
564of an SV instead of a string/length pair.
565
566=cut
567*/
568
569GV *
570Perl_gv_fetchmeth_sv(pTHX_ HV *stash, SV *namesv, I32 level, U32 flags)
571{
572 char *namepv;
573 STRLEN namelen;
574 PERL_ARGS_ASSERT_GV_FETCHMETH_SV;
575 namepv = SvPV(namesv, namelen);
576 if (SvUTF8(namesv))
577 flags |= SVf_UTF8;
578 return gv_fetchmeth_pvn(stash, namepv, namelen, level, flags);
579}
580
581/*
582=for apidoc gv_fetchmeth_pv
583
584Exactly like L</gv_fetchmeth_pvn>, but takes a nul-terminated string
585instead of a string/length pair.
586
587=cut
588*/
589
590GV *
591Perl_gv_fetchmeth_pv(pTHX_ HV *stash, const char *name, I32 level, U32 flags)
592{
593 PERL_ARGS_ASSERT_GV_FETCHMETH_PV;
594 return gv_fetchmeth_pvn(stash, name, strlen(name), level, flags);
595}
596
597/*
598=for apidoc gv_fetchmeth_pvn
954c1994
GS		 599
600Returns the glob with the given C<name> and a defined subroutine or
601C<NULL>. The glob lives in the given C<stash>, or in the stashes
07766739 602accessible via @ISA and UNIVERSAL::.
954c1994
GS		 603
604The argument C<level> should be either 0 or -1. If C<level==0>, as a
605side-effect creates a glob with the given C<name> in the given C<stash>
606which in the case of success contains an alias for the subroutine, and sets
e1a479c5 607up caching info for this glob.
954c1994 608
e6919483
BF		 609Currently, the only significant value for C<flags> is SVf_UTF8.
610
954c1994
GS		 611This function grants C<"SUPER"> token as a postfix of the stash name. The
612GV returned from C<gv_fetchmeth> may be a method cache entry, which is not
4929bf7b 613visible to Perl code. So when calling C<call_sv>, you should not use
954c1994 614the GV directly; instead, you should use the method's CV, which can be
b267980d 615obtained from the GV with the C<GvCV> macro.
954c1994
GS		 616
617=cut
618*/
619
e1a479c5
BB		 620/* NOTE: No support for tied ISA */
621
79072805 622GV *
e6919483 623Perl_gv_fetchmeth_pvn(pTHX_ HV *stash, const char *name, STRLEN len, I32 level, U32 flags)
79072805 624{
97aff369 625 dVAR;
463ee0b2 626 GV** gvp;
e1a479c5
BB		 627 AV* linear_av;
628 SV** linear_svp;
629 SV* linear_sv;
630 HV* cstash;
631 GV* candidate = NULL;
632 CV* cand_cv = NULL;
e1a479c5 633 GV* topgv = NULL;
bfcb3514 634 const char *hvname;
e1a479c5
BB		 635 I32 create = (level >= 0) ? 1 : 0;
636 I32 items;
637 STRLEN packlen;
638 U32 topgen_cmp;
04f3bf56 639 U32 is_utf8 = flags & SVf_UTF8;
a0d0e21e 640
e6919483 641 PERL_ARGS_ASSERT_GV_FETCHMETH_PVN;
7918f24d 642
af09ea45
IK		 643 /* UNIVERSAL methods should be callable without a stash */
644 if (!stash) {
e1a479c5 645 create = 0; /* probably appropriate */
da51bb9b 646 if(!(stash = gv_stashpvs("UNIVERSAL", 0)))
af09ea45
IK		 647 return 0;
648 }
649
e1a479c5
BB		 650 assert(stash);
651
bfcb3514
NC		 652 hvname = HvNAME_get(stash);
653 if (!hvname)
e1a479c5 654 Perl_croak(aTHX_ "Can't use anonymous symbol table for method lookup");
e27ad1f2 655
e1a479c5
BB		 656 assert(hvname);
657 assert(name);
463ee0b2 658
bfcb3514 659 DEBUG_o( Perl_deb(aTHX_ "Looking for method %s in package %s\n",name,hvname) );
44a8e56a 660
dd69841b 661 topgen_cmp = HvMROMETA(stash)->cache_gen + PL_sub_generation;
e1a479c5
BB		 662
663 /* check locally for a real method or a cache entry */
c60dbbc3 664 gvp = (GV**)hv_fetch(stash, name, is_utf8 ? -(I32)len : (I32)len, create);
e1a479c5
BB		 665 if(gvp) {
666 topgv = *gvp;
0f8d4b5e 667 have_gv:
e1a479c5
BB		 668 assert(topgv);
669 if (SvTYPE(topgv) != SVt_PVGV)
04ec7e59 670 gv_init_pvn(topgv, stash, name, len, GV_ADDMULTI|is_utf8);
e1a479c5
BB		 671 if ((cand_cv = GvCV(topgv))) {
672 /* If genuine method or valid cache entry, use it */
673 if (!GvCVGEN(topgv) || GvCVGEN(topgv) == topgen_cmp) {
674 return topgv;
675 }
676 else {
677 /* stale cache entry, junk it and move on */
678 SvREFCNT_dec(cand_cv);
c43ae56f
DM		 679 GvCV_set(topgv, NULL);
680 cand_cv = NULL;
e1a479c5
BB		 681 GvCVGEN(topgv) = 0;
682 }
683 }
684 else if (GvCVGEN(topgv) == topgen_cmp) {
685 /* cache indicates no such method definitively */
686 return 0;
687 }
0f8d4b5e
FC		 688 else if (len > 1 /* shortest is uc */ && HvNAMELEN_get(stash) == 4
689 && strnEQ(hvname, "CORE", 4)
73c02f15 690 && S_maybe_add_coresub(aTHX_ stash,topgv,name,len,0,1))
0f8d4b5e 691 goto have_gv;
463ee0b2 692 }
79072805 693
e1a479c5
BB		 694 packlen = HvNAMELEN_get(stash);
695 if (packlen >= 7 && strEQ(hvname + packlen - 7, "::SUPER")) {
696 HV* basestash;
697 packlen -= 7;
772d5078
BF		 698 basestash = gv_stashpvn(hvname, packlen,
699 GV_ADD | (HvNAMEUTF8(stash) ? SVf_UTF8 : 0));
e1a479c5 700 linear_av = mro_get_linear_isa(basestash);
9607fc9c 701 }
e1a479c5
BB		 702 else {
703 linear_av = mro_get_linear_isa(stash); /* has ourselves at the top of the list */
79072805 704 }
a0d0e21e 705
e1a479c5
BB		 706 linear_svp = AvARRAY(linear_av) + 1; /* skip over self */
707 items = AvFILLp(linear_av); /* no +1, to skip over self */
708 while (items--) {
709 linear_sv = *linear_svp++;
710 assert(linear_sv);
711 cstash = gv_stashsv(linear_sv, 0);
712
dd69841b 713 if (!cstash) {
ecad31f0 714 Perl_ck_warner(aTHX_ packWARN(WARN_SYNTAX),
d0c0e7dd 715 "Can't locate package %"SVf" for @%"HEKf"::ISA",
ecad31f0 716 SVfARG(linear_sv),
d0c0e7dd 717 HEKfARG(HvNAME_HEK(stash)));
e1a479c5
BB		 718 continue;
719 }
9607fc9c 720
e1a479c5
BB		 721 assert(cstash);
722
c60dbbc3 723 gvp = (GV**)hv_fetch(cstash, name, is_utf8 ? -(I32)len : (I32)len, 0);
0f8d4b5e
FC		 724 if (!gvp) {
725 if (len > 1 && HvNAMELEN_get(cstash) == 4) {
726 const char *hvname = HvNAME(cstash); assert(hvname);
727 if (strnEQ(hvname, "CORE", 4)
728 && (candidate =
729 S_maybe_add_coresub(aTHX_ cstash,NULL,name,len,0,0)
730 ))
731 goto have_candidate;
732 }
733 continue;
734 }
735 else candidate = *gvp;
736 have_candidate:
e1a479c5 737 assert(candidate);
04f3bf56 738 if (SvTYPE(candidate) != SVt_PVGV)
04ec7e59 739 gv_init_pvn(candidate, cstash, name, len, GV_ADDMULTI|is_utf8);
e1a479c5
BB		 740 if (SvTYPE(candidate) == SVt_PVGV && (cand_cv = GvCV(candidate)) && !GvCVGEN(candidate)) {
741 /*
742 * Found real method, cache method in topgv if:
743 * 1. topgv has no synonyms (else inheritance crosses wires)
744 * 2. method isn't a stub (else AUTOLOAD fails spectacularly)
745 */
746 if (topgv && (GvREFCNT(topgv) == 1) && (CvROOT(cand_cv) || CvXSUB(cand_cv))) {
9bfbb681
VP		 747 CV *old_cv = GvCV(topgv);
748 SvREFCNT_dec(old_cv);
e1a479c5 749 SvREFCNT_inc_simple_void_NN(cand_cv);
c43ae56f 750 GvCV_set(topgv, cand_cv);
e1a479c5
BB		 751 GvCVGEN(topgv) = topgen_cmp;
752 }
753 return candidate;
754 }
755 }
9607fc9c 756
e1a479c5
BB		 757 /* Check UNIVERSAL without caching */
758 if(level == 0 || level == -1) {
e6919483 759 candidate = gv_fetchmeth_pvn(NULL, name, len, 1, flags);
e1a479c5
BB		 760 if(candidate) {
761 cand_cv = GvCV(candidate);
762 if (topgv && (GvREFCNT(topgv) == 1) && (CvROOT(cand_cv) || CvXSUB(cand_cv))) {
9bfbb681
VP		 763 CV *old_cv = GvCV(topgv);
764 SvREFCNT_dec(old_cv);
e1a479c5 765 SvREFCNT_inc_simple_void_NN(cand_cv);
c43ae56f 766 GvCV_set(topgv, cand_cv);
e1a479c5
BB		 767 GvCVGEN(topgv) = topgen_cmp;
768 }
769 return candidate;
770 }
771 }
772
773 if (topgv && GvREFCNT(topgv) == 1) {
774 /* cache the fact that the method is not defined */
775 GvCVGEN(topgv) = topgen_cmp;
a0d0e21e
LW		 776 }
777
79072805
LW		 778 return 0;
779}
780
954c1994 781/*
460e5730
FC		 782=for apidoc gv_fetchmeth_autoload
783
784This is the old form of L</gv_fetchmeth_pvn_autoload>, which has no flags
785parameter.
786
d21989ed 787=for apidoc gv_fetchmeth_sv_autoload
611c1e95 788
d21989ed
BF		 789Exactly like L</gv_fetchmeth_pvn_autoload>, but takes the name string in the form
790of an SV instead of a string/length pair.
791
792=cut
793*/
794
795GV *
796Perl_gv_fetchmeth_sv_autoload(pTHX_ HV *stash, SV *namesv, I32 level, U32 flags)
797{
798 char *namepv;
799 STRLEN namelen;
800 PERL_ARGS_ASSERT_GV_FETCHMETH_SV_AUTOLOAD;
801 namepv = SvPV(namesv, namelen);
802 if (SvUTF8(namesv))
803 flags |= SVf_UTF8;
804 return gv_fetchmeth_pvn_autoload(stash, namepv, namelen, level, flags);
805}
806
807/*
808=for apidoc gv_fetchmeth_pv_autoload
809
810Exactly like L</gv_fetchmeth_pvn_autoload>, but takes a nul-terminated string
811instead of a string/length pair.
812
813=cut
814*/
815
816GV *
817Perl_gv_fetchmeth_pv_autoload(pTHX_ HV *stash, const char *name, I32 level, U32 flags)
818{
819 PERL_ARGS_ASSERT_GV_FETCHMETH_PV_AUTOLOAD;
820 return gv_fetchmeth_pvn_autoload(stash, name, strlen(name), level, flags);
821}
822
823/*
824=for apidoc gv_fetchmeth_pvn_autoload
825
826Same as gv_fetchmeth_pvn(), but looks for autoloaded subroutines too.
611c1e95
IZ		 827Returns a glob for the subroutine.
828
829For an autoloaded subroutine without a GV, will create a GV even
830if C<level < 0>. For an autoloaded subroutine without a stub, GvCV()
831of the result may be zero.
832
d21989ed
BF		 833Currently, the only significant value for C<flags> is SVf_UTF8.
834
611c1e95
IZ		 835=cut
836*/
837
838GV *
d21989ed 839Perl_gv_fetchmeth_pvn_autoload(pTHX_ HV *stash, const char *name, STRLEN len, I32 level, U32 flags)
611c1e95 840{
499321d3 841 GV *gv = gv_fetchmeth_pvn(stash, name, len, level, flags);
611c1e95 842
d21989ed 843 PERL_ARGS_ASSERT_GV_FETCHMETH_PVN_AUTOLOAD;
7918f24d 844
611c1e95 845 if (!gv) {
611c1e95
IZ		 846 CV *cv;
847 GV **gvp;
848
849 if (!stash)
6136c704 850 return NULL; /* UNIVERSAL::AUTOLOAD could cause trouble */
7edbdc6b 851 if (len == S_autolen && memEQ(name, S_autoload, S_autolen))
6136c704 852 return NULL;
d21989ed 853 if (!(gv = gv_fetchmeth_pvn(stash, S_autoload, S_autolen, FALSE, flags)))
6136c704 854 return NULL;
611c1e95
IZ		 855 cv = GvCV(gv);
856 if (!(CvROOT(cv) || CvXSUB(cv)))
6136c704 857 return NULL;
611c1e95
IZ		 858 /* Have an autoload */
859 if (level < 0) /* Cannot do without a stub */
d21989ed 860 gv_fetchmeth_pvn(stash, name, len, 0, flags);
c60dbbc3
BF		 861 gvp = (GV**)hv_fetch(stash, name,
862 (flags & SVf_UTF8) ? -(I32)len : (I32)len, (level >= 0));
611c1e95 863 if (!gvp)
6136c704 864 return NULL;
611c1e95
IZ		 865 return *gvp;
866 }
867 return gv;
868}
869
870/*
954c1994
GS		 871=for apidoc gv_fetchmethod_autoload
872
873Returns the glob which contains the subroutine to call to invoke the method
874on the C<stash>. In fact in the presence of autoloading this may be the
875glob for "AUTOLOAD". In this case the corresponding variable $AUTOLOAD is
b267980d 876already setup.
954c1994
GS		 877
878The third parameter of C<gv_fetchmethod_autoload> determines whether
879AUTOLOAD lookup is performed if the given method is not present: non-zero
b267980d 880means yes, look for AUTOLOAD; zero means no, don't look for AUTOLOAD.
954c1994 881Calling C<gv_fetchmethod> is equivalent to calling C<gv_fetchmethod_autoload>
b267980d 882with a non-zero C<autoload> parameter.
954c1994
GS		 883
884These functions grant C<"SUPER"> token as a prefix of the method name. Note
885that if you want to keep the returned glob for a long time, you need to
886check for it being "AUTOLOAD", since at the later time the call may load a
887different subroutine due to $AUTOLOAD changing its value. Use the glob
b267980d 888created via a side effect to do this.
954c1994
GS		 889
890These functions have the same side-effects and as C<gv_fetchmeth> with
891C<level==0>. C<name> should be writable if contains C<':'> or C<'
892''>. The warning against passing the GV returned by C<gv_fetchmeth> to
b267980d 893C<call_sv> apply equally to these functions.
954c1994
GS		 894
895=cut
896*/
897
7d3b1f61 898STATIC HV*
9cc50d5b 899S_gv_get_super_pkg(pTHX_ const char* name, I32 namelen, U32 flags)
7d3b1f61
BB		 900{
901 AV* superisa;
902 GV** gvp;
903 GV* gv;
904 HV* stash;
905
7918f24d
NC		 906 PERL_ARGS_ASSERT_GV_GET_SUPER_PKG;
907
f8e7a8bc 908 stash = gv_stashpvn(name, namelen, flags);
7d3b1f61
BB		 909 if(stash) return stash;
910
911 /* If we must create it, give it an @ISA array containing
912 the real package this SUPER is for, so that it's tied
913 into the cache invalidation code correctly */
f8e7a8bc 914 stash = gv_stashpvn(name, namelen, GV_ADD | flags);
7d3b1f61
BB		 915 gvp = (GV**)hv_fetchs(stash, "ISA", TRUE);
916 gv = *gvp;
f8e7a8bc 917 gv_init(gv, stash, "ISA", 3, TRUE);
7d3b1f61
BB		 918 superisa = GvAVn(gv);
919 GvMULTI_on(gv);
ad64d0ec 920 sv_magic(MUTABLE_SV(superisa), MUTABLE_SV(gv), PERL_MAGIC_isa, NULL, 0);
8e3a4a30 921#ifdef USE_ITHREADS
f8e7a8bc
BF		 922 av_push(superisa, newSVpvn_flags(CopSTASHPV(PL_curcop),
923 strlen(CopSTASHPV(PL_curcop)),
924 CopSTASH_flags(PL_curcop)
925 ));
8e3a4a30
NC		 926#else
927 av_push(superisa, newSVhek(CopSTASH(PL_curcop)
928 ? HvNAME_HEK(CopSTASH(PL_curcop)) : NULL));
929#endif
7d3b1f61
BB		 930
931 return stash;
932}
933
dc848c6f 934GV *
864dbfa3 935Perl_gv_fetchmethod_autoload(pTHX_ HV *stash, const char *name, I32 autoload)
dc848c6f 936{
547bb267
NC		 937 PERL_ARGS_ASSERT_GV_FETCHMETHOD_AUTOLOAD;
938
256d1bb2
NC		 939 return gv_fetchmethod_flags(stash, name, autoload ? GV_AUTOLOAD : 0);
940}
941
44130a26
BF		 942GV *
943Perl_gv_fetchmethod_sv_flags(pTHX_ HV *stash, SV *namesv, U32 flags)
944{
945 char *namepv;
946 STRLEN namelen;
947 PERL_ARGS_ASSERT_GV_FETCHMETHOD_SV_FLAGS;
948 namepv = SvPV(namesv, namelen);
949 if (SvUTF8(namesv))
950 flags |= SVf_UTF8;
951 return gv_fetchmethod_pvn_flags(stash, namepv, namelen, flags);
952}
953
954GV *
955Perl_gv_fetchmethod_pv_flags(pTHX_ HV *stash, const char *name, U32 flags)
956{
957 PERL_ARGS_ASSERT_GV_FETCHMETHOD_PV_FLAGS;
958 return gv_fetchmethod_pvn_flags(stash, name, strlen(name), flags);
959}
960
256d1bb2
NC		 961/* Don't merge this yet, as it's likely to get a len parameter, and possibly
962 even a U32 hash */
963GV *
44130a26 964Perl_gv_fetchmethod_pvn_flags(pTHX_ HV *stash, const char *name, const STRLEN len, U32 flags)
256d1bb2 965{
97aff369 966 dVAR;
08105a92 967 register const char *nend;
c445ea15 968 const char *nsplit = NULL;
a0d0e21e 969 GV* gv;
0dae17bd 970 HV* ostash = stash;
c94593d0 971 const char * const origname = name;
ad64d0ec 972 SV *const error_report = MUTABLE_SV(stash);
256d1bb2
NC		 973 const U32 autoload = flags & GV_AUTOLOAD;
974 const U32 do_croak = flags & GV_CROAK;
14d1dfbd 975 const U32 is_utf8 = flags & SVf_UTF8;
0dae17bd 976
44130a26 977 PERL_ARGS_ASSERT_GV_FETCHMETHOD_PVN_FLAGS;
7918f24d 978
eff494dd 979 if (SvTYPE(stash) < SVt_PVHV)
5c284bb0 980 stash = NULL;
c9bf4021
NC		 981 else {
982 /* The only way stash can become NULL later on is if nsplit is set,
983 which in turn means that there is no need for a SVt_PVHV case
984 the error reporting code. */
985 }
b267980d 986
44130a26 987 for (nend = name; *nend || nend != (origname + len); nend++) {
c94593d0 988 if (*nend == '\'') {
a0d0e21e 989 nsplit = nend;
c94593d0
NC		 990 name = nend + 1;
991 }
992 else if (*nend == ':' && *(nend + 1) == ':') {
993 nsplit = nend++;
994 name = nend + 1;
995 }
a0d0e21e
LW		 996 }
997 if (nsplit) {
7edbdc6b 998 if ((nsplit - origname) == 5 && memEQ(origname, "SUPER", 5)) {
9607fc9c 999 /* ->SUPER::method should really be looked up in original stash */
d0c0e7dd
FC		 1000 SV * const tmpstr = sv_2mortal(Perl_newSVpvf(aTHX_
1001 "%"HEKf"::SUPER",
1002 HEKfARG(HvNAME_HEK((HV*)CopSTASH(PL_curcop)))
1003 ));
af09ea45 1004 /* __PACKAGE__::SUPER stash should be autovivified */
9cc50d5b 1005 stash = gv_get_super_pkg(SvPVX_const(tmpstr), SvCUR(tmpstr), SvUTF8(tmpstr));
cea2e8a9 1006 DEBUG_o( Perl_deb(aTHX_ "Treating %s as %s::%s\n",
bfcb3514 1007 origname, HvNAME_get(stash), name) );
4633a7c4 1008 }
e189a56d 1009 else {
af09ea45 1010 /* don't autovifify if ->NoSuchStash::method */
14d1dfbd 1011 stash = gv_stashpvn(origname, nsplit - origname, is_utf8);
e189a56d
IK		 1012
1013 /* however, explicit calls to Pkg::SUPER::method may
1014 happen, and may require autovivification to work */
1015 if (!stash && (nsplit - origname) >= 7 &&
1016 strnEQ(nsplit - 7, "::SUPER", 7) &&
14d1dfbd 1017 gv_stashpvn(origname, nsplit - origname - 7, is_utf8))
9cc50d5b 1018 stash = gv_get_super_pkg(origname, nsplit - origname, flags);
e189a56d 1019 }
0dae17bd 1020 ostash = stash;
4633a7c4
LW		 1021 }
1022
14d1dfbd 1023 gv = gv_fetchmeth_pvn(stash, name, nend - name, 0, flags);
a0d0e21e 1024 if (!gv) {
2f6e0fe7 1025 if (strEQ(name,"import") || strEQ(name,"unimport"))
159b6efe 1026 gv = MUTABLE_GV(&PL_sv_yes);
dc848c6f 1027 else if (autoload)
c8416c26
BF		 1028 gv = gv_autoload_pvn(
1029 ostash, name, nend - name, GV_AUTOLOAD_ISMETHOD|flags
1030 );
256d1bb2
NC		 1031 if (!gv && do_croak) {
1032 /* Right now this is exclusively for the benefit of S_method_common
1033 in pp_hot.c */
1034 if (stash) {
15e6cdd9
DG		 1035 /* If we can't find an IO::File method, it might be a call on
1036 * a filehandle. If IO:File has not been loaded, try to
1037 * require it first instead of croaking */
1038 const char *stash_name = HvNAME_get(stash);
31b05a0f
FR		 1039 if (stash_name && memEQs(stash_name, HvNAMELEN_get(stash), "IO::File")
1040 && !Perl_hv_common(aTHX_ GvHVn(PL_incgv), NULL,
1041 STR_WITH_LEN("IO/File.pm"), 0,
1042 HV_FETCH_ISEXISTS, NULL, 0)
15e6cdd9 1043 ) {
31b05a0f 1044 require_pv("IO/File.pm");
14d1dfbd 1045 gv = gv_fetchmeth_pvn(stash, name, nend - name, 0, flags);
15e6cdd9
DG		 1046 if (gv)
1047 return gv;
1048 }
256d1bb2 1049 Perl_croak(aTHX_
d0c0e7dd
FC		 1050 "Can't locate object method \"%"SVf
1051 "\" via package \"%"HEKf"\"",
f937af42
BF		 1052 SVfARG(newSVpvn_flags(name, nend - name,
1053 SVs_TEMP | is_utf8)),
d0c0e7dd 1054 HEKfARG(HvNAME_HEK(stash)));
256d1bb2
NC		 1055 }
1056 else {
ecad31f0 1057 SV* packnamesv;
256d1bb2 1058
256d1bb2 1059 if (nsplit) {
ecad31f0
BF		 1060 packnamesv = newSVpvn_flags(origname, nsplit - origname,
1061 SVs_TEMP | is_utf8);
256d1bb2 1062 } else {
ecad31f0 1063 packnamesv = sv_2mortal(newSVsv(error_report));
256d1bb2
NC		 1064 }
1065
1066 Perl_croak(aTHX_
ecad31f0
BF		 1067 "Can't locate object method \"%"SVf"\" via package \"%"SVf"\""
1068 " (perhaps you forgot to load \"%"SVf"\"?)",
1069 SVfARG(newSVpvn_flags(name, nend - name,
1070 SVs_TEMP | is_utf8)),
1071 SVfARG(packnamesv), SVfARG(packnamesv));
256d1bb2
NC		 1072 }
1073 }
463ee0b2 1074 }
dc848c6f 1075 else if (autoload) {
9d4ba2ae 1076 CV* const cv = GvCV(gv);
09280a33
CS		 1077 if (!CvROOT(cv) && !CvXSUB(cv)) {
1078 GV* stubgv;
1079 GV* autogv;
1080
1081 if (CvANON(cv))
1082 stubgv = gv;
1083 else {
1084 stubgv = CvGV(cv);
1085 if (GvCV(stubgv) != cv) /* orphaned import */
1086 stubgv = gv;
1087 }
c8416c26
BF		 1088 autogv = gv_autoload_pvn(GvSTASH(stubgv),
1089 GvNAME(stubgv), GvNAMELEN(stubgv),
1090 GV_AUTOLOAD_ISMETHOD
1091 | (GvNAMEUTF8(stubgv) ? SVf_UTF8 : 0));
dc848c6f 1092 if (autogv)
1093 gv = autogv;
1094 }
1095 }
44a8e56a 1096
1097 return gv;
1098}
1099
1100GV*
0eeb01b9 1101Perl_gv_autoload_sv(pTHX_ HV *stash, SV* namesv, U32 flags)
5fba3c91
BF		 1102{
1103 char *namepv;
1104 STRLEN namelen;
0fe84f7c 1105 PERL_ARGS_ASSERT_GV_AUTOLOAD_SV;
5fba3c91
BF		 1106 namepv = SvPV(namesv, namelen);
1107 if (SvUTF8(namesv))
1108 flags |= SVf_UTF8;
0eeb01b9 1109 return gv_autoload_pvn(stash, namepv, namelen, flags);
5fba3c91
BF		 1110}
1111
1112GV*
0eeb01b9 1113Perl_gv_autoload_pv(pTHX_ HV *stash, const char *namepv, U32 flags)
5fba3c91 1114{
0fe84f7c 1115 PERL_ARGS_ASSERT_GV_AUTOLOAD_PV;
0eeb01b9 1116 return gv_autoload_pvn(stash, namepv, strlen(namepv), flags);
5fba3c91
BF		 1117}
1118
1119GV*
0eeb01b9 1120Perl_gv_autoload_pvn(pTHX_ HV *stash, const char *name, STRLEN len, U32 flags)
44a8e56a 1121{
27da23d5 1122 dVAR;
44a8e56a 1123 GV* gv;
1124 CV* cv;
1125 HV* varstash;
1126 GV* vargv;
1127 SV* varsv;
c8416c26
BF		 1128 SV *packname = NULL;
1129 U32 is_utf8 = flags & SVf_UTF8 ? SVf_UTF8 : 0;
44a8e56a 1130
0fe84f7c 1131 PERL_ARGS_ASSERT_GV_AUTOLOAD_PVN;
7918f24d 1132
7edbdc6b 1133 if (len == S_autolen && memEQ(name, S_autoload, S_autolen))
a0714e2c 1134 return NULL;
0dae17bd
GS		 1135 if (stash) {
1136 if (SvTYPE(stash) < SVt_PVHV) {
c8416c26
BF		 1137 STRLEN packname_len = 0;
1138 const char * const packname_ptr = SvPV_const(MUTABLE_SV(stash), packname_len);
1139 packname = newSVpvn_flags(packname_ptr, packname_len,
1140 SVs_TEMP | SvUTF8(stash));
5c284bb0 1141 stash = NULL;
0dae17bd 1142 }
c8416c26
BF		 1143 else
1144 packname = sv_2mortal(newSVhek(HvNAME_HEK(stash)));
0dae17bd 1145 }
c8416c26 1146 if (!(gv = gv_fetchmeth_pvn(stash, S_autoload, S_autolen, FALSE, is_utf8)))
a0714e2c 1147 return NULL;
dc848c6f 1148 cv = GvCV(gv);
1149
adb5a9ae 1150 if (!(CvROOT(cv) || CvXSUB(cv)))
a0714e2c 1151 return NULL;
ed850460 1152
dc848c6f 1153 /*
1154 * Inheriting AUTOLOAD for non-methods works ... for now.
1155 */
0eeb01b9
FC		 1156 if (
1157 !(flags & GV_AUTOLOAD_ISMETHOD)
1158 && (GvCVGEN(gv) || GvSTASH(gv) != stash)
041457d9 1159 )
d1d15184 1160 Perl_ck_warner_d(aTHX_ packWARN(WARN_DEPRECATED),
ecad31f0
BF		 1161 "Use of inherited AUTOLOAD for non-method %"SVf"::%"SVf"() is deprecated",
1162 SVfARG(packname),
1163 SVfARG(newSVpvn_flags(name, len, SVs_TEMP | is_utf8)));
44a8e56a 1164
aed2304a 1165 if (CvISXSUB(cv)) {
bb619f37
FC		 1166 /* Instead of forcing the XSUB do another lookup for $AUTOLOAD
1167 * and split that value on the last '::', pass along the same data
1168 * via the SvPVX field in the CV, and the stash in CvSTASH.
8fa6a409
FC		 1169 *
1170 * Due to an unfortunate accident of history, the SvPVX field
e1fa07e3 1171 * serves two purposes. It is also used for the subroutine's pro-
8fa6a409
FC		 1172 * type. Since SvPVX has been documented as returning the sub name
1173 * for a long time, but not as returning the prototype, we have
1174 * to preserve the SvPVX AUTOLOAD behaviour and put the prototype
1175 * elsewhere.
1176 *
1177 * We put the prototype in the same allocated buffer, but after
1178 * the sub name. The SvPOK flag indicates the presence of a proto-
1179 * type. The CvAUTOLOAD flag indicates the presence of a sub name.
1180 * If both flags are on, then SvLEN is used to indicate the end of
1181 * the prototype (artificially lower than what is actually allo-
1182 * cated), at the risk of having to reallocate a few bytes unneces-
1183 * sarily--but that should happen very rarely, if ever.
1184 *
1185 * We use SvUTF8 for both prototypes and sub names, so if one is
1186 * UTF8, the other must be upgraded.
adb5a9ae 1187 */
c68d9564 1188 CvSTASH_set(cv, stash);
8fa6a409
FC		 1189 if (SvPOK(cv)) { /* Ouch! */
1190 SV *tmpsv = newSVpvn_flags(name, len, is_utf8);
1191 STRLEN ulen;
1192 const char *proto = CvPROTO(cv);
1193 assert(proto);
1194 if (SvUTF8(cv))
1195 sv_utf8_upgrade_flags_grow(tmpsv, 0, CvPROTOLEN(cv) + 2);
1196 ulen = SvCUR(tmpsv);
1197 SvCUR(tmpsv)++; /* include null in string */
1198 sv_catpvn_flags(
1199 tmpsv, proto, CvPROTOLEN(cv), SV_CATBYTES*!SvUTF8(cv)
1200 );
1201 SvTEMP_on(tmpsv); /* Allow theft */
1202 sv_setsv_nomg((SV *)cv, tmpsv);
05b525f4 1203 SvTEMP_off(tmpsv);
8fa6a409
FC		 1204 SvREFCNT_dec(tmpsv);
1205 SvLEN(cv) = SvCUR(cv) + 1;
1206 SvCUR(cv) = ulen;
1207 }
1208 else {
1209 sv_setpvn((SV *)cv, name, len);
1210 SvPOK_off(cv);
1211 if (is_utf8)
c8416c26 1212 SvUTF8_on(cv);
8fa6a409
FC		 1213 else SvUTF8_off(cv);
1214 }
1215 CvAUTOLOAD_on(cv);
adb5a9ae 1216 }
adb5a9ae 1217
44a8e56a 1218 /*
1219 * Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name.
1220 * The subroutine's original name may not be "AUTOLOAD", so we don't
1221 * use that, but for lack of anything better we will use the sub's
1222 * original package to look up $AUTOLOAD.
1223 */
1224 varstash = GvSTASH(CvGV(cv));
5c7983e5 1225 vargv = *(GV**)hv_fetch(varstash, S_autoload, S_autolen, TRUE);
3d35f11b
GS		 1226 ENTER;
1227
c69033f2 1228 if (!isGV(vargv)) {
04ec7e59 1229 gv_init_pvn(vargv, varstash, S_autoload, S_autolen, 0);
c69033f2 1230#ifdef PERL_DONT_CREATE_GVSV
561b68a9 1231 GvSV(vargv) = newSV(0);
c69033f2
NC		 1232#endif
1233 }
3d35f11b 1234 LEAVE;
e203899d 1235 varsv = GvSVn(vargv);
c8416c26 1236 sv_setsv(varsv, packname);
396482e1 1237 sv_catpvs(varsv, "::");
d40bf27b
NC		 1238 /* Ensure SvSETMAGIC() is called if necessary. In particular, to clear
1239 tainting if $FOO::AUTOLOAD was previously tainted, but is not now. */
61a9130e
FC		 1240 sv_catpvn_flags(
1241 varsv, name, len,
5bcd1ef4 1242 SV_SMAGIC|(is_utf8 ? SV_CATUTF8 : SV_CATBYTES)
61a9130e 1243 );
c8416c26
BF		 1244 if (is_utf8)
1245 SvUTF8_on(varsv);
a0d0e21e
LW		 1246 return gv;
1247}
1248
44a2ac75
YO		 1249
1250/* require_tie_mod() internal routine for requiring a module
486ec47a 1251 * that implements the logic of automatic ties like %! and %-
44a2ac75
YO		 1252 *
1253 * The "gv" parameter should be the glob.
45cbc99a
RGS		 1254 * "varpv" holds the name of the var, used for error messages.
1255 * "namesv" holds the module name. Its refcount will be decremented.
44a2ac75 1256 * "methpv" holds the method name to test for to check that things
45cbc99a
RGS		 1257 * are working reasonably close to as expected.
1258 * "flags": if flag & 1 then save the scalar before loading.
44a2ac75
YO		 1259 * For the protection of $! to work (it is set by this routine)
1260 * the sv slot must already be magicalized.
d2c93421 1261 */
44a2ac75
YO		 1262STATIC HV*
1263S_require_tie_mod(pTHX_ GV *gv, const char *varpv, SV* namesv, const char *methpv,const U32 flags)
d2c93421 1264{
27da23d5 1265 dVAR;
da51bb9b 1266 HV* stash = gv_stashsv(namesv, 0);
45cbc99a 1267
7918f24d
NC		 1268 PERL_ARGS_ASSERT_REQUIRE_TIE_MOD;
1269
0ea03996 1270 if (!stash || !(gv_fetchmethod_autoload(stash, methpv, FALSE))) {
45cbc99a
RGS		 1271 SV *module = newSVsv(namesv);
1272 char varname = *varpv; /* varpv might be clobbered by load_module,
1273 so save it. For the moment it's always
1274 a single char. */
b82b06b8 1275 const char type = varname == '[' ? '$' : '%';
d2c93421 1276 dSP;
d2c93421 1277 ENTER;
44a2ac75 1278 if ( flags & 1 )
45cbc99a 1279 save_scalar(gv);
cac54379 1280 PUSHSTACKi(PERLSI_MAGIC);
45cbc99a 1281 Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT, module, NULL);
cac54379 1282 POPSTACK;
d2c93421
RH		 1283 LEAVE;
1284 SPAGAIN;
da51bb9b 1285 stash = gv_stashsv(namesv, 0);
44a2ac75 1286 if (!stash)
b82b06b8
FC		 1287 Perl_croak(aTHX_ "panic: Can't use %c%c because %"SVf" is not available",
1288 type, varname, SVfARG(namesv));
45cbc99a 1289 else if (!gv_fetchmethod(stash, methpv))
b82b06b8
FC		 1290 Perl_croak(aTHX_ "panic: Can't use %c%c because %"SVf" does not support method %s",
1291 type, varname, SVfARG(namesv), methpv);
d2c93421 1292 }
45cbc99a 1293 SvREFCNT_dec(namesv);
44a2ac75 1294 return stash;
d2c93421
RH		 1295}
1296
954c1994
GS		 1297/*
1298=for apidoc gv_stashpv
1299
da51bb9b 1300Returns a pointer to the stash for a specified package. Uses C<strlen> to
75c442e4 1301determine the length of C<name>, then calls C<gv_stashpvn()>.
954c1994
GS		 1302
1303=cut
1304*/
1305
a0d0e21e 1306HV*
864dbfa3 1307Perl_gv_stashpv(pTHX_ const char *name, I32 create)
a0d0e21e 1308{
7918f24d 1309 PERL_ARGS_ASSERT_GV_STASHPV;
dc437b57 1310 return gv_stashpvn(name, strlen(name), create);
1311}
1312
bc96cb06
SH		 1313/*
1314=for apidoc gv_stashpvn
1315
da51bb9b
NC		 1316Returns a pointer to the stash for a specified package. The C<namelen>
1317parameter indicates the length of the C<name>, in bytes. C<flags> is passed
1318to C<gv_fetchpvn_flags()>, so if set to C<GV_ADD> then the package will be
1319created if it does not already exist. If the package does not exist and
1320C<flags> is 0 (or any other setting that does not create packages) then NULL
1321is returned.
1322
bc96cb06
SH		 1323
1324=cut
1325*/
1326
dc437b57 1327HV*
da51bb9b 1328Perl_gv_stashpvn(pTHX_ const char *name, U32 namelen, I32 flags)
dc437b57 1329{
0cea0058 1330 char smallbuf[128];
46fc3d4c 1331 char *tmpbuf;
a0d0e21e
LW		 1332 HV *stash;
1333 GV *tmpgv;
add0ecde 1334 U32 tmplen = namelen + 2;
dc437b57 1335
7918f24d
NC		 1336 PERL_ARGS_ASSERT_GV_STASHPVN;
1337
add0ecde 1338 if (tmplen <= sizeof smallbuf)
46fc3d4c 1339 tmpbuf = smallbuf;
1340 else
add0ecde
VP		 1341 Newx(tmpbuf, tmplen, char);
1342 Copy(name, tmpbuf, namelen, char);
1343 tmpbuf[namelen] = ':';
1344 tmpbuf[namelen+1] = ':';
1345 tmpgv = gv_fetchpvn_flags(tmpbuf, tmplen, flags, SVt_PVHV);
46fc3d4c 1346 if (tmpbuf != smallbuf)
1347 Safefree(tmpbuf);
a0d0e21e 1348 if (!tmpgv)
da51bb9b 1349 return NULL;
a0d0e21e 1350 stash = GvHV(tmpgv);
1f656fcf 1351 if (!(flags & ~GV_NOADD_MASK) && !stash) return NULL;
9efb5c72 1352 assert(stash);
1f656fcf 1353 if (!HvNAME_get(stash)) {
0be4d16f 1354 hv_name_set(stash, name, namelen, flags & SVf_UTF8 ? SVf_UTF8 : 0 );
1f656fcf
FC		 1355
1356 /* FIXME: This is a repeat of logic in gv_fetchpvn_flags */
1357 /* If the containing stash has multiple effective
1358 names, see that this one gets them, too. */
1359 if (HvAUX(GvSTASH(tmpgv))->xhv_name_count)
1360 mro_package_moved(stash, NULL, tmpgv, 1);
1361 }
a0d0e21e 1362 return stash;
463ee0b2
LW		 1363}
1364
954c1994
GS		 1365/*
1366=for apidoc gv_stashsv
1367
da51bb9b 1368Returns a pointer to the stash for a specified package. See C<gv_stashpvn>.
954c1994
GS		 1369
1370=cut
1371*/
1372
a0d0e21e 1373HV*
da51bb9b 1374Perl_gv_stashsv(pTHX_ SV *sv, I32 flags)
a0d0e21e 1375{
dc437b57 1376 STRLEN len;
9d4ba2ae 1377 const char * const ptr = SvPV_const(sv,len);
7918f24d
NC		 1378
1379 PERL_ARGS_ASSERT_GV_STASHSV;
1380
0be4d16f 1381 return gv_stashpvn(ptr, len, flags | SvUTF8(sv));
a0d0e21e
LW		 1382}
1383
1384
463ee0b2 1385GV *
fe9845cc 1386Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 add, const svtype sv_type) {
7918f24d 1387 PERL_ARGS_ASSERT_GV_FETCHPV;
b7787f18 1388 return gv_fetchpvn_flags(nambeg, strlen(nambeg), add, sv_type);
7a5fd60d
NC		 1389}
1390
1391GV *
fe9845cc 1392Perl_gv_fetchsv(pTHX_ SV *name, I32 flags, const svtype sv_type) {
7a5fd60d 1393 STRLEN len;
77cb3b01
FC		 1394 const char * const nambeg =
1395 SvPV_flags_const(name, len, flags & GV_NO_SVGMAGIC ? 0 : SV_GMAGIC);
7918f24d 1396 PERL_ARGS_ASSERT_GV_FETCHSV;
7a5fd60d
NC		 1397 return gv_fetchpvn_flags(nambeg, len, flags | SvUTF8(name), sv_type);
1398}
1399
ad7cce9f 1400STATIC void
290a1700 1401S_gv_magicalize_isa(pTHX_ GV *gv)
ad7cce9f
FR		 1402{
1403 AV* av;
1404
1405 PERL_ARGS_ASSERT_GV_MAGICALIZE_ISA;
1406
1407 av = GvAVn(gv);
1408 GvMULTI_on(gv);
1409 sv_magic(MUTABLE_SV(av), MUTABLE_SV(gv), PERL_MAGIC_isa,
1410 NULL, 0);
ad7cce9f
FR		 1411}
1412
1413STATIC void
26469672 1414S_gv_magicalize_overload(pTHX_ GV *gv)
ad7cce9f
FR		 1415{
1416 HV* hv;
1417
1418 PERL_ARGS_ASSERT_GV_MAGICALIZE_OVERLOAD;
1419
1420 hv = GvHVn(gv);
1421 GvMULTI_on(gv);
1422 hv_magic(hv, NULL, PERL_MAGIC_overload);
1423}
1424
7a5fd60d
NC		 1425GV *
1426Perl_gv_fetchpvn_flags(pTHX_ const char *nambeg, STRLEN full_len, I32 flags,
fe9845cc 1427 const svtype sv_type)
79072805 1428{
97aff369 1429 dVAR;
08105a92 1430 register const char *name = nambeg;
c445ea15 1431 register GV *gv = NULL;
79072805 1432 GV**gvp;
79072805 1433 I32 len;
b3d904f3 1434 register const char *name_cursor;
c445ea15 1435 HV *stash = NULL;
add2581e 1436 const I32 no_init = flags & (GV_NOADD_NOINIT | GV_NOINIT);
e26df76a 1437 const I32 no_expand = flags & GV_NOEXPAND;
780a5241 1438 const I32 add = flags & ~GV_NOADD_MASK;
04f3bf56 1439 const U32 is_utf8 = flags & SVf_UTF8;
9da346da 1440 bool addmg = !!(flags & GV_ADDMG);
b3d904f3
NC		 1441 const char *const name_end = nambeg + full_len;
1442 const char *const name_em1 = name_end - 1;
5e0caaeb 1443 U32 faking_it;
79072805 1444
7918f24d
NC		 1445 PERL_ARGS_ASSERT_GV_FETCHPVN_FLAGS;
1446
fafc274c
NC		 1447 if (flags & GV_NOTQUAL) {
1448 /* Caller promised that there is no stash, so we can skip the check. */
1449 len = full_len;
1450 goto no_stash;
1451 }
1452
ecad31f0 1453 if (full_len > 2 && *name == '*' && isIDFIRST_lazy_if(name + 1, is_utf8)) {
b208e10c 1454 /* accidental stringify on a GV? */
c07a80fd 1455 name++;
b208e10c 1456 }
c07a80fd 1457
b3d904f3 1458 for (name_cursor = name; name_cursor < name_end; name_cursor++) {
46c0ec20
FC		 1459 if (name_cursor < name_em1 &&
1460 ((*name_cursor == ':'
b3d904f3 1461 && name_cursor[1] == ':')
46c0ec20 1462 || *name_cursor == '\''))
463ee0b2 1463 {
463ee0b2 1464 if (!stash)
3280af22 1465 stash = PL_defstash;
dc437b57 1466 if (!stash || !SvREFCNT(stash)) /* symbol table under destruction */
a0714e2c 1467 return NULL;
463ee0b2 1468
b3d904f3 1469 len = name_cursor - name;
088225fd 1470 if (name_cursor > nambeg) { /* Skip for initial :: or ' */
3a5b580c
NC		 1471 const char *key;
1472 if (*name_cursor == ':') {
1473 key = name;
e771aaa9
NC		 1474 len += 2;
1475 } else {
3a5b580c 1476 char *tmpbuf;
2ae0db35 1477 Newx(tmpbuf, len+2, char);
e771aaa9
NC		 1478 Copy(name, tmpbuf, len, char);
1479 tmpbuf[len++] = ':';
1480 tmpbuf[len++] = ':';
3a5b580c 1481 key = tmpbuf;
e771aaa9 1482 }
0be4d16f 1483 gvp = (GV**)hv_fetch(stash, key, is_utf8 ? -len : len, add);
a0714e2c 1484 gv = gvp ? *gvp : NULL;
159b6efe 1485 if (gv && gv != (const GV *)&PL_sv_undef) {
6fa846a0 1486 if (SvTYPE(gv) != SVt_PVGV)
04ec7e59 1487 gv_init_pvn(gv, stash, key, len, (add & GV_ADDMULTI)|is_utf8);
6fa846a0
GS		 1488 else
1489 GvMULTI_on(gv);
1490 }
3a5b580c 1491 if (key != name)
b9d2ea5b 1492 Safefree(key);
159b6efe 1493 if (!gv || gv == (const GV *)&PL_sv_undef)
a0714e2c 1494 return NULL;
85e6fe83 1495
463ee0b2 1496 if (!(stash = GvHV(gv)))
298d6511 1497 {
99ee9762
FC		 1498 stash = GvHV(gv) = newHV();
1499 if (!HvNAME_get(stash)) {
e058c50a
FC		 1500 if (GvSTASH(gv) == PL_defstash && len == 6
1501 && strnEQ(name, "CORE", 4))
1502 hv_name_set(stash, "CORE", 4, 0);
1503 else
1504 hv_name_set(
0be4d16f 1505 stash, nambeg, name_cursor-nambeg, is_utf8
e058c50a 1506 );
99ee9762
FC		 1507 /* If the containing stash has multiple effective
1508 names, see that this one gets them, too. */
1509 if (HvAUX(GvSTASH(gv))->xhv_name_count)
1510 mro_package_moved(stash, NULL, gv, 1);
1511 }
298d6511 1512 }
99ee9762 1513 else if (!HvNAME_get(stash))
0be4d16f 1514 hv_name_set(stash, nambeg, name_cursor - nambeg, is_utf8);
463ee0b2
LW		 1515 }
1516
b3d904f3
NC		 1517 if (*name_cursor == ':')
1518 name_cursor++;
088225fd 1519 name = name_cursor+1;
ad6bfa9d 1520 if (name == name_end)
159b6efe
NC		 1521 return gv
1522 ? gv : MUTABLE_GV(*hv_fetchs(PL_defstash, "main::", TRUE));
79072805 1523 }
79072805 1524 }
b3d904f3 1525 len = name_cursor - name;
463ee0b2
LW		 1526
1527 /* No stash in name, so see how we can default */
1528
1529 if (!stash) {
fafc274c 1530 no_stash:
8ccce9ae 1531 if (len && isIDFIRST_lazy(name)) {
9607fc9c 1532 bool global = FALSE;
1533
8ccce9ae
NC		 1534 switch (len) {
1535 case 1:
18ea00d7 1536 if (*name == '_')
9d116dd7 1537 global = TRUE;
18ea00d7 1538 break;
8ccce9ae
NC		 1539 case 3:
1540 if ((name[0] == 'I' && name[1] == 'N' && name[2] == 'C')
1541 || (name[0] == 'E' && name[1] == 'N' && name[2] == 'V')
1542 || (name[0] == 'S' && name[1] == 'I' && name[2] == 'G'))
9d116dd7 1543 global = TRUE;
18ea00d7 1544 break;
8ccce9ae
NC		 1545 case 4:
1546 if (name[0] == 'A' && name[1] == 'R' && name[2] == 'G'
1547 && name[3] == 'V')
9d116dd7 1548 global = TRUE;
18ea00d7 1549 break;
8ccce9ae
NC		 1550 case 5:
1551 if (name[0] == 'S' && name[1] == 'T' && name[2] == 'D'
1552 && name[3] == 'I' && name[4] == 'N')
463ee0b2 1553 global = TRUE;
18ea00d7 1554 break;
8ccce9ae
NC		 1555 case 6:
1556 if ((name[0] == 'S' && name[1] == 'T' && name[2] == 'D')
1557 &&((name[3] == 'O' && name[4] == 'U' && name[5] == 'T')
1558 ||(name[3] == 'E' && name[4] == 'R' && name[5] == 'R')))
1559 global = TRUE;
1560 break;
1561 case 7:
1562 if (name[0] == 'A' && name[1] == 'R' && name[2] == 'G'
1563 && name[3] == 'V' && name[4] == 'O' && name[5] == 'U'
1564 && name[6] == 'T')
18ea00d7
NC		 1565 global = TRUE;
1566 break;
463ee0b2 1567 }
9607fc9c 1568
463ee0b2 1569 if (global)
3280af22 1570 stash = PL_defstash;
923e4eb5 1571 else if (IN_PERL_COMPILETIME) {
3280af22
NIS		 1572 stash = PL_curstash;
1573 if (add && (PL_hints & HINT_STRICT_VARS) &&
748a9306
LW		 1574 sv_type != SVt_PVCV &&
1575 sv_type != SVt_PVGV &&
4633a7c4 1576 sv_type != SVt_PVFM &&
c07a80fd 1577 sv_type != SVt_PVIO &&
70ec6265
NC		 1578 !(len == 1 && sv_type == SVt_PV &&
1579 (*name == 'a' || *name == 'b')) )
748a9306 1580 {
0be4d16f 1581 gvp = (GV**)hv_fetch(stash,name,is_utf8 ? -len : len,0);
4633a7c4 1582 if (!gvp ||
159b6efe 1583 *gvp == (const GV *)&PL_sv_undef ||
a5f75d66
AD		 1584 SvTYPE(*gvp) != SVt_PVGV)
1585 {
d4c19fe8 1586 stash = NULL;
a5f75d66 1587 }
155aba94
GS		 1588 else if ((sv_type == SVt_PV && !GvIMPORTED_SV(*gvp)) ||
1589 (sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp)) ||
1590 (sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp)) )
4633a7c4 1591 {
ecad31f0 1592 SV* namesv = newSVpvn_flags(name, len, SVs_TEMP | is_utf8);
fe13d51d 1593 /* diag_listed_as: Variable "%s" is not imported%s */
413ff9f6
FC		 1594 Perl_ck_warner_d(
1595 aTHX_ packWARN(WARN_MISC),
ecad31f0 1596 "Variable \"%c%"SVf"\" is not imported",
4633a7c4
LW		 1597 sv_type == SVt_PVAV ? '@' :
1598 sv_type == SVt_PVHV ? '%' : '$',
ecad31f0 1599 SVfARG(namesv));
8ebc5c01 1600 if (GvCVu(*gvp))
413ff9f6
FC		 1601 Perl_ck_warner_d(
1602 aTHX_ packWARN(WARN_MISC),
ecad31f0 1603 "\t(Did you mean &%"SVf" instead?)\n", SVfARG(namesv)
413ff9f6 1604 );
d4c19fe8 1605 stash = NULL;
4633a7c4 1606 }
a0d0e21e 1607 }
85e6fe83 1608 }
463ee0b2 1609 else
1d7c1841 1610 stash = CopSTASH(PL_curcop);
463ee0b2
LW		 1611 }
1612 else
3280af22 1613 stash = PL_defstash;
463ee0b2
LW		 1614 }
1615
1616 /* By this point we should have a stash and a name */
1617
a0d0e21e 1618 if (!stash) {
5a844595 1619 if (add) {
9d4ba2ae 1620 SV * const err = Perl_mess(aTHX_
ecad31f0 1621 "Global symbol \"%s%"SVf"\" requires explicit package name",
5a844595
GS		 1622 (sv_type == SVt_PV ? "$"
1623 : sv_type == SVt_PVAV ? "@"
1624 : sv_type == SVt_PVHV ? "%"
ecad31f0 1625 : ""), SVfARG(newSVpvn_flags(name, len, SVs_TEMP | is_utf8)));
e7f343b6 1626 GV *gv;
608b3986
AE		 1627 if (USE_UTF8_IN_NAMES)
1628 SvUTF8_on(err);
1629 qerror(err);
76f68e9b 1630 gv = gv_fetchpvs("<none>::", GV_ADDMULTI, SVt_PVHV);
e7f343b6
NC		 1631 if(!gv) {
1632 /* symbol table under destruction */
1633 return NULL;
1634 }
1635 stash = GvHV(gv);
a0d0e21e 1636 }
d7aacf4e 1637 else
a0714e2c 1638 return NULL;
a0d0e21e
LW		 1639 }
1640
1641 if (!SvREFCNT(stash)) /* symbol table under destruction */
a0714e2c 1642 return NULL;
a0d0e21e 1643
0be4d16f 1644 gvp = (GV**)hv_fetch(stash,name,is_utf8 ? -len : len,add);
23496c6e
FC		 1645 if (!gvp || *gvp == (const GV *)&PL_sv_undef) {
1646 if (addmg) gv = (GV *)newSV(0);
1647 else return NULL;
1648 }
914ecc63
FC		 1649 else gv = *gvp, addmg = 0;
1650 /* From this point on, addmg means gv has not been inserted in the
1651 symtab yet. */
1652
79072805 1653 if (SvTYPE(gv) == SVt_PVGV) {
a0d0e21e 1654 if (add) {
a5f75d66 1655 GvMULTI_on(gv);
e6066781 1656 gv_init_svtype(gv, sv_type);
b82b06b8
FC		 1657 if (len == 1 && stash == PL_defstash) {
1658 if (sv_type == SVt_PVHV || sv_type == SVt_PVGV) {
44a2ac75
YO		 1659 if (*name == '!')
1660 require_tie_mod(gv, "!", newSVpvs("Errno"), "TIEHASH", 1);
45cbc99a 1661 else if (*name == '-' || *name == '+')
192b9cd1 1662 require_tie_mod(gv, name, newSVpvs("Tie::Hash::NamedCapture"), "TIEHASH", 0);
b82b06b8
FC		 1663 }
1664 if ((sv_type==SVt_PV || sv_type==SVt_PVGV) && *name == '[')
1665 require_tie_mod(gv,name,newSVpvs("arybase"),"FETCH",0);
45cbc99a 1666 }
af16de9f
FC		 1667 else if (len == 3 && sv_type == SVt_PVAV
1668 && strnEQ(name, "ISA", 3)
1669 && (!GvAV(gv) || !SvSMAGICAL(GvAV(gv))))
1670 gv_magicalize_isa(gv);
a0d0e21e 1671 }
79072805 1672 return gv;
add2581e 1673 } else if (no_init) {
23496c6e 1674 assert(!addmg);
55d729e4 1675 return gv;
e26df76a 1676 } else if (no_expand && SvROK(gv)) {
23496c6e 1677 assert(!addmg);
e26df76a 1678 return gv;
79072805 1679 }
93a17b20 1680
5e0caaeb
NC		 1681 /* Adding a new symbol.
1682 Unless of course there was already something non-GV here, in which case
1683 we want to behave as if there was always a GV here, containing some sort
1684 of subroutine.
1685 Otherwise we run the risk of creating things like GvIO, which can cause
1686 subtle bugs. eg the one that tripped up SQL::Translator */
1687
1688 faking_it = SvOK(gv);
93a17b20 1689
9b387841 1690 if (add & GV_ADDWARN)
ecad31f0 1691 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL), "Had to create %"SVf" unexpectedly",
f1c07be4 1692 SVfARG(newSVpvn_flags(nambeg, name_end-nambeg, SVs_TEMP | is_utf8 )));
04ec7e59 1693 gv_init_pvn(gv, stash, name, len, (add & GV_ADDMULTI)|is_utf8);
93a17b20 1694
ecad31f0
BF		 1695 if ( isIDFIRST_lazy_if(name, is_utf8)
1696 && ! (isLEXWARN_on ? ckWARN(WARN_ONCE) : (PL_dowarn & G_WARN_ON ) ) )
0453d815
PM		 1697 GvMULTI_on(gv) ;
1698
93a17b20 1699 /* set up magic where warranted */
44428a46
FC		 1700 if (stash != PL_defstash) { /* not the main stash */
1701 /* We only have to check for four names here: EXPORT, ISA, OVERLOAD
4aaa4757
FC		 1702 and VERSION. All the others apply only to the main stash or to
1703 CORE (which is checked right after this). */
f4e68e82 1704 if (len > 2) {
b464bac0 1705 const char * const name2 = name + 1;
cc4c2da6 1706 switch (*name) {
cc4c2da6
NC		 1707 case 'E':
1708 if (strnEQ(name2, "XPORT", 5))
1709 GvMULTI_on(gv);
1710 break;
1711 case 'I':
44428a46 1712 if (strEQ(name2, "SA"))
290a1700 1713 gv_magicalize_isa(gv);
cc4c2da6
NC		 1714 break;
1715 case 'O':
44428a46 1716 if (strEQ(name2, "VERLOAD"))
ad7cce9f 1717 gv_magicalize_overload(gv);
cc4c2da6 1718 break;
44428a46
FC		 1719 case 'V':
1720 if (strEQ(name2, "ERSION"))
1721 GvMULTI_on(gv);
1722 break;
4aaa4757
FC		 1723 default:
1724 goto try_core;
1725 }
23496c6e 1726 goto add_magical_gv;
4aaa4757
FC		 1727 }
1728 try_core:
1729 if (len > 1 /* shortest is uc */ && HvNAMELEN_get(stash) == 4) {
1730 /* Avoid null warning: */
1731 const char * const stashname = HvNAME(stash); assert(stashname);
0f8d4b5e
FC		 1732 if (strnEQ(stashname, "CORE", 4)
1733 && S_maybe_add_coresub(aTHX_
1734 addmg ? stash : 0, gv, name, len, nambeg, full_len
1735 ))
1736 addmg = 0;
44428a46
FC		 1737 }
1738 }
1739 else if (len > 1) {
1740#ifndef EBCDIC
1741 if (*name > 'V' ) {
1742 NOOP;
1743 /* Nothing else to do.
1744 The compiler will probably turn the switch statement into a
1745 branch table. Make sure we avoid even that small overhead for
1746 the common case of lower case variable names. */
1747 } else
1748#endif
1749 {
1750 const char * const name2 = name + 1;
1751 switch (*name) {
1752 case 'A':
1753 if (strEQ(name2, "RGV")) {
1754 IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START;
1755 }
1756 else if (strEQ(name2, "RGVOUT")) {
1757 GvMULTI_on(gv);
1758 }
1759 break;
1760 case 'E':
1761 if (strnEQ(name2, "XPORT", 5))
1762 GvMULTI_on(gv);
1763 break;
1764 case 'I':
1765 if (strEQ(name2, "SA")) {
290a1700 1766 gv_magicalize_isa(gv);
44428a46
FC		 1767 }
1768 break;
1769 case 'O':
1770 if (strEQ(name2, "VERLOAD")) {
ad7cce9f 1771 gv_magicalize_overload(gv);
44428a46
FC		 1772 }
1773 break;
cc4c2da6
NC		 1774 case 'S':
1775 if (strEQ(name2, "IG")) {
1776 HV *hv;
1777 I32 i;
d525a7b2
NC		 1778 if (!PL_psig_name) {
1779 Newxz(PL_psig_name, 2 * SIG_SIZE, SV*);
a02a5408 1780 Newxz(PL_psig_pend, SIG_SIZE, int);
d525a7b2 1781 PL_psig_ptr = PL_psig_name + SIG_SIZE;
0bdedcb3
NC		 1782 } else {
1783 /* I think that the only way to get here is to re-use an
1784 embedded perl interpreter, where the previous
1785 use didn't clean up fully because
1786 PL_perl_destruct_level was 0. I'm not sure that we
1787 "support" that, in that I suspect in that scenario
1788 there are sufficient other garbage values left in the
1789 interpreter structure that something else will crash
1790 before we get here. I suspect that this is one of
1791 those "doctor, it hurts when I do this" bugs. */
d525a7b2 1792 Zero(PL_psig_name, 2 * SIG_SIZE, SV*);
0bdedcb3 1793 Zero(PL_psig_pend, SIG_SIZE, int);
cc4c2da6
NC		 1794 }
1795 GvMULTI_on(gv);
1796 hv = GvHVn(gv);
a0714e2c 1797 hv_magic(hv, NULL, PERL_MAGIC_sig);
cc4c2da6 1798 for (i = 1; i < SIG_SIZE; i++) {
551405c4 1799 SV * const * const init = hv_fetch(hv, PL_sig_name[i], strlen(PL_sig_name[i]), 1);
cc4c2da6
NC		 1800 if (init)
1801 sv_setsv(*init, &PL_sv_undef);
cc4c2da6
NC		 1802 }
1803 }
1804 break;
1805 case 'V':
1806 if (strEQ(name2, "ERSION"))
1807 GvMULTI_on(gv);
1808 break;
e5218da5
GA		 1809 case '\003': /* $^CHILD_ERROR_NATIVE */
1810 if (strEQ(name2, "HILD_ERROR_NATIVE"))
1811 goto magicalize;
1812 break;
cc4c2da6
NC		 1813 case '\005': /* $^ENCODING */
1814 if (strEQ(name2, "NCODING"))
1815 goto magicalize;
1816 break;
9ebf26ad
FR		 1817 case '\007': /* $^GLOBAL_PHASE */
1818 if (strEQ(name2, "LOBAL_PHASE"))
1819 goto ro_magicalize;
1820 break;
cde0cee5
YO		 1821 case '\015': /* $^MATCH */
1822 if (strEQ(name2, "ATCH"))
2fdbfb4d 1823 goto magicalize;
cc4c2da6
NC		 1824 case '\017': /* $^OPEN */
1825 if (strEQ(name2, "PEN"))
1826 goto magicalize;
1827 break;
cde0cee5
YO		 1828 case '\020': /* $^PREMATCH $^POSTMATCH */
1829 if (strEQ(name2, "REMATCH") || strEQ(name2, "OSTMATCH"))
9ebf26ad
FR		 1830 goto magicalize;
1831 break;
cc4c2da6
NC		 1832 case '\024': /* ${^TAINT} */
1833 if (strEQ(name2, "AINT"))
1834 goto ro_magicalize;
1835 break;
7cebcbc0 1836 case '\025': /* ${^UNICODE}, ${^UTF8LOCALE} */
a0288114 1837 if (strEQ(name2, "NICODE"))
cc4c2da6 1838 goto ro_magicalize;
a0288114 1839 if (strEQ(name2, "TF8LOCALE"))
7cebcbc0 1840 goto ro_magicalize;
e07ea26a
NC		 1841 if (strEQ(name2, "TF8CACHE"))
1842 goto magicalize;
cc4c2da6
NC		 1843 break;
1844 case '\027': /* $^WARNING_BITS */
1845 if (strEQ(name2, "ARNING_BITS"))
1846 goto magicalize;
1847 break;
1848 case '1':
1849 case '2':
1850 case '3':
1851 case '4':
1852 case '5':
1853 case '6':
1854 case '7':
1855 case '8':
1856 case '9':
85e6fe83 1857 {
2fdbfb4d
AB		 1858 /* Ensures that we have an all-digit variable, ${"1foo"} fails
1859 this test */
1860 /* This snippet is taken from is_gv_magical */
cc4c2da6
NC		 1861 const char *end = name + len;
1862 while (--end > name) {
23496c6e 1863 if (!isDIGIT(*end)) goto add_magical_gv;
cc4c2da6 1864 }
2fdbfb4d 1865 goto magicalize;
1d7c1841 1866 }
dc437b57 1867 }
93a17b20 1868 }
392db708
NC		 1869 } else {
1870 /* Names of length 1. (Or 0. But name is NUL terminated, so that will
1871 be case '\0' in this switch statement (ie a default case) */
cc4c2da6 1872 switch (*name) {
6361f656
AB		 1873 case '&': /* $& */
1874 case '`': /* $` */
1875 case '\'': /* $' */
cc4c2da6
NC		 1876 if (
1877 sv_type == SVt_PVAV ||
1878 sv_type == SVt_PVHV ||
1879 sv_type == SVt_PVCV ||
1880 sv_type == SVt_PVFM ||
1881 sv_type == SVt_PVIO
1882 ) { break; }
1883 PL_sawampersand = TRUE;
2fdbfb4d 1884 goto magicalize;
cc4c2da6 1885
6361f656 1886 case ':': /* $: */
c69033f2 1887 sv_setpv(GvSVn(gv),PL_chopset);
cc4c2da6
NC		 1888 goto magicalize;
1889
6361f656 1890 case '?': /* $? */
ff0cee69 1891#ifdef COMPLEX_STATUS
c69033f2 1892 SvUPGRADE(GvSVn(gv), SVt_PVLV);
ff0cee69 1893#endif
cc4c2da6 1894 goto magicalize;
ff0cee69 1895
6361f656 1896 case '!': /* $! */
67261566 1897 GvMULTI_on(gv);
44a2ac75 1898 /* If %! has been used, automatically load Errno.pm. */
d2c93421 1899
ad64d0ec 1900 sv_magic(GvSVn(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, name, len);
d2c93421 1901
44a2ac75 1902 /* magicalization must be done before require_tie_mod is called */
67261566 1903 if (sv_type == SVt_PVHV || sv_type == SVt_PVGV)
44a2ac75 1904 require_tie_mod(gv, "!", newSVpvs("Errno"), "TIEHASH", 1);
d2c93421 1905
6cef1e77 1906 break;
6361f656
AB		 1907 case '-': /* $- */
1908 case '+': /* $+ */
44a2ac75
YO		 1909 GvMULTI_on(gv); /* no used once warnings here */
1910 {
44a2ac75 1911 AV* const av = GvAVn(gv);
ad64d0ec 1912 SV* const avc = (*name == '+') ? MUTABLE_SV(av) : NULL;
44a2ac75 1913
ad64d0ec
NC		 1914 sv_magic(MUTABLE_SV(av), avc, PERL_MAGIC_regdata, NULL, 0);
1915 sv_magic(GvSVn(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, name, len);
67261566 1916 if (avc)
44a2ac75 1917 SvREADONLY_on(GvSVn(gv));
44a2ac75 1918 SvREADONLY_on(av);
67261566
YO		 1919
1920 if (sv_type == SVt_PVHV || sv_type == SVt_PVGV)
192b9cd1 1921 require_tie_mod(gv, name, newSVpvs("Tie::Hash::NamedCapture"), "TIEHASH", 0);
67261566 1922
80305961 1923 break;
cc4c2da6 1924 }
6361f656
AB		 1925 case '*': /* $* */
1926 case '#': /* $# */
9b387841
NC		 1927 if (sv_type == SVt_PV)
1928 Perl_ck_warner_d(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX),
1929 "$%c is no longer supported", *name);
8ae1fe26 1930 break;
6361f656 1931 case '|': /* $| */
c69033f2 1932 sv_setiv(GvSVn(gv), (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0);
cc4c2da6
NC		 1933 goto magicalize;
1934
b3ca2e83
NC		 1935 case '\010': /* $^H */
1936 {
1937 HV *const hv = GvHVn(gv);
1938 hv_magic(hv, NULL, PERL_MAGIC_hints);
1939 }
1940 goto magicalize;
b82b06b8 1941 case '[': /* $[ */
7d69d4a6
FC		 1942 if ((sv_type == SVt_PV || sv_type == SVt_PVGV)
1943 && FEATURE_IS_ENABLED_d("$[")) {
b82b06b8
FC		 1944 if (addmg) (void)hv_store(stash,name,len,(SV *)gv,0);
1945 require_tie_mod(gv,name,newSVpvs("arybase"),"FETCH",0);
1946 addmg = 0;
1947 }
7d69d4a6 1948 else goto magicalize;
b82b06b8 1949 break;
cc4c2da6 1950 case '\023': /* $^S */
2fdbfb4d
AB		 1951 ro_magicalize:
1952 SvREADONLY_on(GvSVn(gv));
1953 /* FALL THROUGH */
6361f656
AB		 1954 case '0': /* $0 */
1955 case '1': /* $1 */
1956 case '2': /* $2 */
1957 case '3': /* $3 */
1958 case '4': /* $4 */
1959 case '5': /* $5 */
1960 case '6': /* $6 */
1961 case '7': /* $7 */
1962 case '8': /* $8 */
1963 case '9': /* $9 */
6361f656
AB		 1964 case '^': /* $^ */
1965 case '~': /* $~ */
1966 case '=': /* $= */
1967 case '%': /* $% */
1968 case '.': /* $. */
1969 case '(': /* $( */
1970 case ')': /* $) */
1971 case '<': /* $< */
1972 case '>': /* $> */
1973 case '\\': /* $\ */
1974 case '/': /* $/ */
9cdac2a2 1975 case '$': /* $$ */
cc4c2da6
NC		 1976 case '\001': /* $^A */
1977 case '\003': /* $^C */
1978 case '\004': /* $^D */
1979 case '\005': /* $^E */
1980 case '\006': /* $^F */
cc4c2da6
NC		 1981 case '\011': /* $^I, NOT \t in EBCDIC */
1982 case '\016': /* $^N */
1983 case '\017': /* $^O */
1984 case '\020': /* $^P */
1985 case '\024': /* $^T */
1986 case '\027': /* $^W */
1987 magicalize:
ad64d0ec 1988 sv_magic(GvSVn(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, name, len);
cc4c2da6 1989 break;
e521374c 1990
cc4c2da6 1991 case '\014': /* $^L */
76f68e9b 1992 sv_setpvs(GvSVn(gv),"\f");
c69033f2 1993 PL_formfeed = GvSVn(gv);
463ee0b2 1994 break;
6361f656 1995 case ';': /* $; */
76f68e9b 1996 sv_setpvs(GvSVn(gv),"\034");
463ee0b2 1997 break;
6361f656 1998 case ']': /* $] */
cc4c2da6 1999 {
3638bf15 2000 SV * const sv = GvSV(gv);
d7aa5382 2001 if (!sv_derived_from(PL_patchlevel, "version"))
ac0e6a2f 2002 upg_version(PL_patchlevel, TRUE);
7d54d38e
SH		 2003 GvSV(gv) = vnumify(PL_patchlevel);
2004 SvREADONLY_on(GvSV(gv));
2005 SvREFCNT_dec(sv);
93a17b20
LW		 2006 }
2007 break;
cc4c2da6
NC		 2008 case '\026': /* $^V */
2009 {
3638bf15 2010 SV * const sv = GvSV(gv);
f9be5ac8
DM		 2011 GvSV(gv) = new_version(PL_patchlevel);
2012 SvREADONLY_on(GvSV(gv));
2013 SvREFCNT_dec(sv);
16070b82
GS		 2014 }
2015 break;
cc4c2da6 2016 }
79072805 2017 }
23496c6e
FC		 2018 add_magical_gv:
2019 if (addmg) {
2020 if (GvAV(gv) || GvHV(gv) || GvIO(gv) || GvCV(gv) || (
2021 GvSV(gv) && (SvOK(GvSV(gv)) || SvMAGICAL(GvSV(gv)))
2022 ))
0f43181e 2023 (void)hv_store(stash,name,len,(SV *)gv,0);
23496c6e
FC		 2024 else SvREFCNT_dec(gv), gv = NULL;
2025 }
e6066781 2026 if (gv) gv_init_svtype(gv, faking_it ? SVt_PVCV : sv_type);
93a17b20 2027 return gv;
79072805
LW		 2028}
2029
2030void
35a4481c 2031Perl_gv_fullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain)
43693395 2032{
ed60a868 2033 const char *name;
35a4481c 2034 const HV * const hv = GvSTASH(gv);
7918f24d
NC		 2035
2036 PERL_ARGS_ASSERT_GV_FULLNAME4;
2037
666ea192 2038 sv_setpv(sv, prefix ? prefix : "");
a0288114 2039
52a6327b 2040 if (hv && (name = HvNAME(hv))) {
ed60a868
FC		 2041 const STRLEN len = HvNAMELEN(hv);
2042 if (keepmain || strnNE(name, "main", len)) {
2043 sv_catpvn_flags(sv,name,len,HvNAMEUTF8(hv)?SV_CATUTF8:SV_CATBYTES);
396482e1 2044 sv_catpvs(sv,"::");
ed60a868 2045 }
43693395 2046 }
ed60a868 2047 else sv_catpvs(sv,"__ANON__::");
04f3bf56 2048 sv_catsv(sv,sv_2mortal(newSVhek(GvNAME_HEK(gv))));
43693395
GS		 2049}
2050
2051void
35a4481c 2052Perl_gv_efullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain)
43693395 2053{
099be4f1 2054 const GV * const egv = GvEGVx(gv);
7918f24d
NC		 2055
2056 PERL_ARGS_ASSERT_GV_EFULLNAME4;
2057
46c461b5 2058 gv_fullname4(sv, egv ? egv : gv, prefix, keepmain);
43693395
GS		 2059}
2060
79072805 2061void
1146e912 2062Perl_gv_check(pTHX_ const HV *stash)
79072805 2063{
97aff369 2064 dVAR;
79072805 2065 register I32 i;
463ee0b2 2066
7918f24d
NC		 2067 PERL_ARGS_ASSERT_GV_CHECK;
2068
8990e307
LW		 2069 if (!HvARRAY(stash))
2070 return;
a0d0e21e 2071 for (i = 0; i <= (I32) HvMAX(stash); i++) {
e1ec3a88 2072 const HE *entry;
dc437b57 2073 for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) {
b7787f18
AL		 2074 register GV *gv;
2075 HV *hv;
dc437b57 2076 if (HeKEY(entry)[HeKLEN(entry)-1] == ':' &&
159b6efe 2077 (gv = MUTABLE_GV(HeVAL(entry))) && isGV(gv) && (hv = GvHV(gv)))
a0d0e21e 2078 {
19b6c847 2079 if (hv != PL_defstash && hv != stash)
a0d0e21e
LW		 2080 gv_check(hv); /* nested package */
2081 }
ecad31f0
BF		 2082 else if ( *HeKEY(entry) != '_'
2083 && isIDFIRST_lazy_if(HeKEY(entry), HeUTF8(entry)) ) {
e1ec3a88 2084 const char *file;
159b6efe 2085 gv = MUTABLE_GV(HeVAL(entry));
55d729e4 2086 if (SvTYPE(gv) != SVt_PVGV || GvMULTI(gv))
463ee0b2 2087 continue;
1d7c1841 2088 file = GvFILE(gv);
1d7c1841
GS		 2089 CopLINE_set(PL_curcop, GvLINE(gv));
2090#ifdef USE_ITHREADS
dd374669 2091 CopFILE(PL_curcop) = (char *)file; /* set for warning */
1d7c1841 2092#else
9bde8eb0
NC		 2093 CopFILEGV(PL_curcop)
2094 = gv_fetchfile_flags(file, HEK_LEN(GvFILE_HEK(gv)), 0);
1d7c1841 2095#endif
9014280d 2096 Perl_warner(aTHX_ packWARN(WARN_ONCE),
d0c0e7dd
FC		 2097 "Name \"%"HEKf"::%"HEKf
2098 "\" used only once: possible typo",
2099 HEKfARG(HvNAME_HEK(stash)),
2100 HEKfARG(GvNAME_HEK(gv)));
463ee0b2 2101 }
79072805
LW		 2102 }
2103 }
2104}
2105
2106GV *
9cc50d5b 2107Perl_newGVgen_flags(pTHX_ const char *pack, U32 flags)
79072805 2108{
97aff369 2109 dVAR;
9cc50d5b 2110 PERL_ARGS_ASSERT_NEWGVGEN_FLAGS;
7918f24d 2111
9cc50d5b
BF		 2112 return gv_fetchpv(Perl_form(aTHX_ "%"SVf"::_GEN_%ld",
2113 SVfARG(newSVpvn_flags(pack, strlen(pack),
2114 SVs_TEMP | flags)),
2115 (long)PL_gensym++),
2116 GV_ADD, SVt_PVGV);
79072805
LW		 2117}
2118
2119/* hopefully this is only called on local symbol table entries */
2120
2121GP*
864dbfa3 2122Perl_gp_ref(pTHX_ GP *gp)
79072805 2123{
97aff369 2124 dVAR;
1d7c1841 2125 if (!gp)
d4c19fe8 2126 return NULL;
79072805 2127 gp->gp_refcnt++;
44a8e56a 2128 if (gp->gp_cv) {
2129 if (gp->gp_cvgen) {
e1a479c5
BB		 2130 /* If the GP they asked for a reference to contains
2131 a method cache entry, clear it first, so that we
2132 don't infect them with our cached entry */
44a8e56a 2133 SvREFCNT_dec(gp->gp_cv);
601f1833 2134 gp->gp_cv = NULL;
44a8e56a 2135 gp->gp_cvgen = 0;
2136 }
44a8e56a 2137 }
79072805 2138 return gp;
79072805
LW		 2139}
2140
2141void
864dbfa3 2142Perl_gp_free(pTHX_ GV *gv)
79072805 2143{
97aff369 2144 dVAR;
79072805 2145 GP* gp;
b0d55c99 2146 int attempts = 100;
79072805 2147
f7877b28 2148 if (!gv || !isGV_with_GP(gv) || !(gp = GvGP(gv)))
79072805 2149 return;
f248d071 2150 if (gp->gp_refcnt == 0) {
9b387841
NC		 2151 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
2152 "Attempt to free unreferenced glob pointers"
2153 pTHX__FORMAT pTHX__VALUE);
79072805
LW		 2154 return;
2155 }
748a9306
LW		 2156 if (--gp->gp_refcnt > 0) {
2157 if (gp->gp_egv == gv)
2158 gp->gp_egv = 0;
c43ae56f 2159 GvGP_set(gv, NULL);
79072805 2160 return;
748a9306 2161 }
79072805 2162
b0d55c99
FC		 2163 while (1) {
2164 /* Copy and null out all the glob slots, so destructors do not see
2165 freed SVs. */
2166 HEK * const file_hek = gp->gp_file_hek;
2167 SV * const sv = gp->gp_sv;
2168 AV * const av = gp->gp_av;
2169 HV * const hv = gp->gp_hv;
2170 IO * const io = gp->gp_io;
2171 CV * const cv = gp->gp_cv;
2172 CV * const form = gp->gp_form;
2173
2174 gp->gp_file_hek = NULL;
2175 gp->gp_sv = NULL;
2176 gp->gp_av = NULL;
2177 gp->gp_hv = NULL;
2178 gp->gp_io = NULL;
2179 gp->gp_cv = NULL;
2180 gp->gp_form = NULL;
2181
2182 if (file_hek)
2183 unshare_hek(file_hek);
2184
2185 SvREFCNT_dec(sv);
2186 SvREFCNT_dec(av);
2187 /* FIXME - another reference loop GV -> symtab -> GV ?
2188 Somehow gp->gp_hv can end up pointing at freed garbage. */
2189 if (hv && SvTYPE(hv) == SVt_PVHV) {
c2242065
BF		 2190 const HEK *hvname_hek = HvNAME_HEK(hv);
2191 if (PL_stashcache && hvname_hek)
2192 (void)hv_delete(PL_stashcache, HEK_KEY(hvname_hek),
2193 (HEK_UTF8(hvname_hek) ? -HEK_LEN(hvname_hek) : HEK_LEN(hvname_hek)),
2194 G_DISCARD);
b0d55c99
FC		 2195 SvREFCNT_dec(hv);
2196 }
2197 SvREFCNT_dec(io);
2198 SvREFCNT_dec(cv);
2199 SvREFCNT_dec(form);
2200
2201 if (!gp->gp_file_hek
2202 && !gp->gp_sv
2203 && !gp->gp_av
2204 && !gp->gp_hv
2205 && !gp->gp_io
2206 && !gp->gp_cv
2207 && !gp->gp_form) break;
2208
2209 if (--attempts == 0) {
2210 Perl_die(aTHX_
2211 "panic: gp_free failed to free glob pointer - "
2212 "something is repeatedly re-creating entries"
2213 );
2214 }
13207a71 2215 }
748a9306 2216
79072805 2217 Safefree(gp);
c43ae56f 2218 GvGP_set(gv, NULL);
79072805
LW		 2219}
2220
d460ef45
NIS		 2221int
2222Perl_magic_freeovrld(pTHX_ SV *sv, MAGIC *mg)
2223{
53c1dcc0
AL		 2224 AMT * const amtp = (AMT*)mg->mg_ptr;
2225 PERL_UNUSED_ARG(sv);
dd374669 2226
7918f24d
NC		 2227 PERL_ARGS_ASSERT_MAGIC_FREEOVRLD;
2228
d460ef45
NIS		 2229 if (amtp && AMT_AMAGIC(amtp)) {
2230 int i;
2231 for (i = 1; i < NofAMmeth; i++) {
53c1dcc0 2232 CV * const cv = amtp->table[i];
b37c2d43 2233 if (cv) {
ad64d0ec 2234 SvREFCNT_dec(MUTABLE_SV(cv));
601f1833 2235 amtp->table[i] = NULL;
d460ef45
NIS		 2236 }
2237 }
2238 }
2239 return 0;
2240}
2241
a0d0e21e 2242/* Updates and caches the CV's */
c3a9a790
RGS		 2243/* Returns:
2244 * 1 on success and there is some overload
2245 * 0 if there is no overload
2246 * -1 if some error occurred and it couldn't croak
2247 */
a0d0e21e 2248
c3a9a790 2249int
242f8760 2250Perl_Gv_AMupdate(pTHX_ HV *stash, bool destructing)
a0d0e21e 2251{
97aff369 2252 dVAR;
ad64d0ec 2253 MAGIC* const mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table);
a6006777 2254 AMT amt;
9b439311 2255 const struct mro_meta* stash_meta = HvMROMETA(stash);
e1a479c5 2256 U32 newgen;
a0d0e21e 2257
7918f24d
NC		 2258 PERL_ARGS_ASSERT_GV_AMUPDATE;
2259
9b439311 2260 newgen = PL_sub_generation + stash_meta->pkg_gen + stash_meta->cache_gen;
14899595
NC		 2261 if (mg) {
2262 const AMT * const amtp = (AMT*)mg->mg_ptr;
2263 if (amtp->was_ok_am == PL_amagic_generation
e1a479c5 2264 && amtp->was_ok_sub == newgen) {
c3a9a790 2265 return AMT_OVERLOADED(amtp) ? 1 : 0;
14899595 2266 }
ad64d0ec 2267 sv_unmagic(MUTABLE_SV(stash), PERL_MAGIC_overload_table);
14899595 2268 }
a0d0e21e 2269
bfcb3514 2270 DEBUG_o( Perl_deb(aTHX_ "Recalcing overload magic in package %s\n",HvNAME_get(stash)) );
a0d0e21e 2271
d460ef45 2272 Zero(&amt,1,AMT);
3280af22 2273 amt.was_ok_am = PL_amagic_generation;
e1a479c5 2274 amt.was_ok_sub = newgen;
a6006777 2275 amt.fallback = AMGfallNO;
2276 amt.flags = 0;
2277
a6006777 2278 {
32251b26
IZ		 2279 int filled = 0, have_ovl = 0;
2280 int i, lim = 1;
a6006777 2281
22c35a8c 2282 /* Work with "fallback" key, which we assume to be first in PL_AMG_names */
a6006777 2283
89ffc314 2284 /* Try to find via inheritance. */
e6919483 2285 GV *gv = gv_fetchmeth_pvn(stash, PL_AMG_names[0], 2, -1, 0);
53c1dcc0
AL		 2286 SV * const sv = gv ? GvSV(gv) : NULL;
2287 CV* cv;
89ffc314
IZ		 2288
2289 if (!gv)
32251b26 2290 lim = DESTROY_amg; /* Skip overloading entries. */
c69033f2
NC		 2291#ifdef PERL_DONT_CREATE_GVSV
2292 else if (!sv) {
6f207bd3 2293 NOOP; /* Equivalent to !SvTRUE and !SvOK */
c69033f2
NC		 2294 }
2295#endif
89ffc314
IZ		 2296 else if (SvTRUE(sv))
2297 amt.fallback=AMGfallYES;
2298 else if (SvOK(sv))
2299 amt.fallback=AMGfallNEVER;
a6006777 2300
32251b26 2301 for (i = 1; i < lim; i++)
601f1833 2302 amt.table[i] = NULL;
32251b26 2303 for (; i < NofAMmeth; i++) {
6136c704 2304 const char * const cooky = PL_AMG_names[i];
32251b26 2305 /* Human-readable form, for debugging: */
6136c704 2306 const char * const cp = (i >= DESTROY_amg ? cooky : AMG_id2name(i));
d279ab82 2307 const STRLEN l = PL_AMG_namelens[i];
89ffc314 2308
a0288114 2309 DEBUG_o( Perl_deb(aTHX_ "Checking overloading of \"%s\" in package \"%.256s\"\n",
bfcb3514 2310 cp, HvNAME_get(stash)) );
611c1e95
IZ		 2311 /* don't fill the cache while looking up!
2312 Creation of inheritance stubs in intermediate packages may
2313 conflict with the logic of runtime method substitution.
2314 Indeed, for inheritance A -> B -> C, if C overloads "+0",
2315 then we could have created stubs for "(+0" in A and C too.
2316 But if B overloads "bool", we may want to use it for
2317 numifying instead of C's "+0". */
2318 if (i >= DESTROY_amg)
d21989ed 2319 gv = Perl_gv_fetchmeth_pvn_autoload(aTHX_ stash, cooky, l, 0, 0);
611c1e95 2320 else /* Autoload taken care of below */
e6919483 2321 gv = Perl_gv_fetchmeth_pvn(aTHX_ stash, cooky, l, -1, 0);
46fc3d4c 2322 cv = 0;
89ffc314 2323 if (gv && (cv = GvCV(gv))) {
f0e9f182
FC		 2324 if(GvNAMELEN(CvGV(cv)) == 3 && strEQ(GvNAME(CvGV(cv)), "nil")){
2325 const char * const hvname = HvNAME_get(GvSTASH(CvGV(cv)));
2326 if (hvname && HEK_LEN(HvNAME_HEK(GvSTASH(CvGV(cv)))) == 8
2327 && strEQ(hvname, "overload")) {
611c1e95
IZ		 2328 /* This is a hack to support autoloading..., while
2329 knowing *which* methods were declared as overloaded. */
44a8e56a 2330 /* GvSV contains the name of the method. */
6136c704 2331 GV *ngv = NULL;
c69033f2 2332 SV *gvsv = GvSV(gv);
a0288114
AL		 2333
2334 DEBUG_o( Perl_deb(aTHX_ "Resolving method \"%"SVf256\
2335 "\" for overloaded \"%s\" in package \"%.256s\"\n",
f0e9f182 2336 (void*)GvSV(gv), cp, HvNAME(stash)) );
c69033f2 2337 if (!gvsv || !SvPOK(gvsv)
7f415459 2338 || !(ngv = gv_fetchmethod_sv_flags(stash, gvsv, 0)))
dc848c6f 2339 {
a0288114 2340 /* Can be an import stub (created by "can"). */
242f8760 2341 if (destructing) {
c3a9a790 2342 return -1;
242f8760
RGS		 2343 }
2344 else {
d66cca07
BF		 2345 const SV * const name = (gvsv && SvPOK(gvsv))
2346 ? gvsv
2347 : newSVpvs_flags("???", SVs_TEMP);
2348 Perl_croak(aTHX_ "%s method \"%"SVf256
2349 "\" overloading \"%s\" "\
d0c0e7dd 2350 "in package \"%"HEKf256"\"",
242f8760
RGS		 2351 (GvCVGEN(gv) ? "Stub found while resolving"
2352 : "Can't resolve"),
d66cca07 2353 SVfARG(name), cp,
d0c0e7dd 2354 HEKfARG(
d66cca07 2355 HvNAME_HEK(stash)
d0c0e7dd 2356 ));
242f8760 2357 }
44a8e56a 2358 }
dc848c6f 2359 cv = GvCV(gv = ngv);
f0e9f182 2360 }
44a8e56a 2361 }
b464bac0 2362 DEBUG_o( Perl_deb(aTHX_ "Overloading \"%s\" in package \"%.256s\" via \"%.256s::%.256s\"\n",
bfcb3514 2363 cp, HvNAME_get(stash), HvNAME_get(GvSTASH(CvGV(cv))),
44a8e56a 2364 GvNAME(CvGV(cv))) );
2365 filled = 1;
32251b26
IZ		 2366 if (i < DESTROY_amg)
2367 have_ovl = 1;
611c1e95 2368 } else if (gv) { /* Autoloaded... */
ea726b52 2369 cv = MUTABLE_CV(gv);
611c1e95 2370 filled = 1;
44a8e56a 2371 }
ea726b52 2372 amt.table[i]=MUTABLE_CV(SvREFCNT_inc_simple(cv));
a0d0e21e 2373 }
a0d0e21e 2374 if (filled) {
a6006777 2375 AMT_AMAGIC_on(&amt);
32251b26
IZ		 2376 if (have_ovl)
2377 AMT_OVERLOADED_on(&amt);
ad64d0ec 2378 sv_magic(MUTABLE_SV(stash), 0, PERL_MAGIC_overload_table,
14befaf4 2379 (char*)&amt, sizeof(AMT));
32251b26 2380 return have_ovl;
a0d0e21e
LW		 2381 }
2382 }
a6006777 2383 /* Here we have no table: */
9cbac4c7 2384 /* no_table: */
a6006777 2385 AMT_AMAGIC_off(&amt);
ad64d0ec 2386 sv_magic(MUTABLE_SV(stash), 0, PERL_MAGIC_overload_table,
14befaf4 2387 (char*)&amt, sizeof(AMTS));
c3a9a790 2388 return 0;
a0d0e21e
LW		 2389}
2390
32251b26
IZ		 2391
2392CV*
2393Perl_gv_handler(pTHX_ HV *stash, I32 id)
2394{
97aff369 2395 dVAR;
3f8f4626 2396 MAGIC *mg;
32251b26 2397 AMT *amtp;
e1a479c5 2398 U32 newgen;
9b439311 2399 struct mro_meta* stash_meta;
32251b26 2400
bfcb3514 2401 if (!stash || !HvNAME_get(stash))
601f1833 2402 return NULL;
e1a479c5 2403
9b439311
BB		 2404 stash_meta = HvMROMETA(stash);
2405 newgen = PL_sub_generation + stash_meta->pkg_gen + stash_meta->cache_gen;
e1a479c5 2406
ad64d0ec 2407 mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table);
32251b26
IZ		 2408 if (!mg) {
2409 do_update:
242f8760
RGS		 2410 /* If we're looking up a destructor to invoke, we must avoid
2411 * that Gv_AMupdate croaks, because we might be dying already */
2dcac756 2412 if (Gv_AMupdate(stash, cBOOL(id == DESTROY_amg)) == -1) {
242f8760
RGS		 2413 /* and if it didn't found a destructor, we fall back
2414 * to a simpler method that will only look for the
2415 * destructor instead of the whole magic */
2416 if (id == DESTROY_amg) {
2417 GV * const gv = gv_fetchmethod(stash, "DESTROY");
2418 if (gv)
2419 return GvCV(gv);
2420 }
2421 return NULL;
2422 }
ad64d0ec 2423 mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table);
32251b26 2424 }
a9fd4e40 2425 assert(mg);
32251b26
IZ		 2426 amtp = (AMT*)mg->mg_ptr;
2427 if ( amtp->was_ok_am != PL_amagic_generation
e1a479c5 2428 || amtp->was_ok_sub != newgen )
32251b26 2429 goto do_update;
3ad83ce7 2430 if (AMT_AMAGIC(amtp)) {
b7787f18 2431 CV * const ret = amtp->table[id];
3ad83ce7
AMS		 2432 if (ret && isGV(ret)) { /* Autoloading stab */
2433 /* Passing it through may have resulted in a warning
2434 "Inherited AUTOLOAD for a non-method deprecated", since
2435 our caller is going through a function call, not a method call.
2436 So return the CV for AUTOLOAD, setting $AUTOLOAD. */
890ce7af 2437 GV * const gv = gv_fetchmethod(stash, PL_AMG_names[id]);
3ad83ce7
AMS		 2438
2439 if (gv && GvCV(gv))
2440 return GvCV(gv);
2441 }
2442 return ret;
2443 }
a0288114 2444
601f1833 2445 return NULL;
32251b26
IZ		 2446}
2447
2448
6f1401dc
DM		 2449/* Implement tryAMAGICun_MG macro.
2450 Do get magic, then see if the stack arg is overloaded and if so call it.
2451 Flags:
2452 AMGf_set return the arg using SETs rather than assigning to
2453 the targ
2454 AMGf_numeric apply sv_2num to the stack arg.
2455*/
2456
2457bool
2458Perl_try_amagic_un(pTHX_ int method, int flags) {
2459 dVAR;
2460 dSP;
2461 SV* tmpsv;
2462 SV* const arg = TOPs;
2463
2464 SvGETMAGIC(arg);
2465
9f8bf298
NC		 2466 if (SvAMAGIC(arg) && (tmpsv = amagic_call(arg, &PL_sv_undef, method,
2467 AMGf_noright | AMGf_unary))) {
6f1401dc
DM		 2468 if (flags & AMGf_set) {
2469 SETs(tmpsv);
2470 }
2471 else {
2472 dTARGET;
2473 if (SvPADMY(TARG)) {
2474 sv_setsv(TARG, tmpsv);
2475 SETTARG;
2476 }
2477 else
2478 SETs(tmpsv);
2479 }
2480 PUTBACK;
2481 return TRUE;
2482 }
2483
2484 if ((flags & AMGf_numeric) && SvROK(arg))
2485 *sp = sv_2num(arg);
2486 return FALSE;
2487}
2488
2489
2490/* Implement tryAMAGICbin_MG macro.
2491 Do get magic, then see if the two stack args are overloaded and if so
2492 call it.
2493 Flags:
2494 AMGf_set return the arg using SETs rather than assigning to
2495 the targ
2496 AMGf_assign op may be called as mutator (eg +=)
2497 AMGf_numeric apply sv_2num to the stack arg.
2498*/
2499
2500bool
2501Perl_try_amagic_bin(pTHX_ int method, int flags) {
2502 dVAR;
2503 dSP;
2504 SV* const left = TOPm1s;
2505 SV* const right = TOPs;
2506
2507 SvGETMAGIC(left);
2508 if (left != right)
2509 SvGETMAGIC(right);
2510
2511 if (SvAMAGIC(left) || SvAMAGIC(right)) {
2512 SV * const tmpsv = amagic_call(left, right, method,
2513 ((flags & AMGf_assign) && opASSIGN ? AMGf_assign: 0));
2514 if (tmpsv) {
2515 if (flags & AMGf_set) {
2516 (void)POPs;
2517 SETs(tmpsv);
2518 }
2519 else {
2520 dATARGET;
2521 (void)POPs;
2522 if (opASSIGN || SvPADMY(TARG)) {
2523 sv_setsv(TARG, tmpsv);
2524 SETTARG;
2525 }
2526 else
2527 SETs(tmpsv);
2528 }
2529 PUTBACK;
2530 return TRUE;
2531 }
2532 }
75ea7a12
FC		 2533 if(left==right && SvGMAGICAL(left)) {
2534 SV * const left = sv_newmortal();
2535 *(sp-1) = left;
2536 /* Print the uninitialized warning now, so it includes the vari-
2537 able name. */
2538 if (!SvOK(right)) {
2539 if (ckWARN(WARN_UNINITIALIZED)) report_uninit(right);
2540 sv_setsv_flags(left, &PL_sv_no, 0);
2541 }
2542 else sv_setsv_flags(left, right, 0);
2543 SvGETMAGIC(right);
2544 }
6f1401dc 2545 if (flags & AMGf_numeric) {
75ea7a12
FC		 2546 if (SvROK(TOPm1s))
2547 *(sp-1) = sv_2num(TOPm1s);
6f1401dc
DM		 2548 if (SvROK(right))
2549 *sp = sv_2num(right);
2550 }
2551 return FALSE;
2552}
2553
25a9ffce
NC		 2554SV *
2555Perl_amagic_deref_call(pTHX_ SV *ref, int method) {
2556 SV *tmpsv = NULL;
2557
2558 PERL_ARGS_ASSERT_AMAGIC_DEREF_CALL;
2559
2560 while (SvAMAGIC(ref) &&
2561 (tmpsv = amagic_call(ref, &PL_sv_undef, method,
2562 AMGf_noright | AMGf_unary))) {
2563 if (!SvROK(tmpsv))
2564 Perl_croak(aTHX_ "Overloaded dereference did not return a reference");
2565 if (tmpsv == ref || SvRV(tmpsv) == SvRV(ref)) {
2566 /* Bail out if it returns us the same reference. */
2567 return tmpsv;
2568 }
2569 ref = tmpsv;
2570 }
2571 return tmpsv ? tmpsv : ref;
2572}
6f1401dc 2573
a0d0e21e 2574SV*
864dbfa3 2575Perl_amagic_call(pTHX_ SV *left, SV *right, int method, int flags)
a0d0e21e 2576{
27da23d5 2577 dVAR;
b267980d 2578 MAGIC *mg;
9c5ffd7c 2579 CV *cv=NULL;
a0d0e21e 2580 CV **cvp=NULL, **ocvp=NULL;
9c5ffd7c 2581 AMT *amtp=NULL, *oamtp=NULL;
b464bac0
AL		 2582 int off = 0, off1, lr = 0, notfound = 0;
2583 int postpr = 0, force_cpy = 0;
2584 int assign = AMGf_assign & flags;
2585 const int assignshift = assign ? 1 : 0;
bf5522a1 2586 int use_default_op = 0;
497b47a8
JH		 2587#ifdef DEBUGGING
2588 int fl=0;
497b47a8 2589#endif
25716404 2590 HV* stash=NULL;
7918f24d
NC		 2591
2592 PERL_ARGS_ASSERT_AMAGIC_CALL;
2593
e46c382e 2594 if ( PL_curcop->cop_hints & HINT_NO_AMAGIC ) {
20439bc7 2595 SV *lex_mask = cop_hints_fetch_pvs(PL_curcop, "overloading", 0);
e46c382e
YK		 2596
2597 if ( !lex_mask || !SvOK(lex_mask) )
2598 /* overloading lexically disabled */
2599 return NULL;
2600 else if ( lex_mask && SvPOK(lex_mask) ) {
2601 /* we have an entry in the hints hash, check if method has been
2602 * masked by overloading.pm */
d15cd831 2603 STRLEN len;
e46c382e 2604 const int offset = method / 8;
d87d3eed 2605 const int bit = method % 8;
e46c382e
YK		 2606 char *pv = SvPV(lex_mask, len);
2607
d15cd831 2608 /* Bit set, so this overloading operator is disabled */
ed15e576 2609 if ( (STRLEN)offset < len && pv[offset] & ( 1 << bit ) )
e46c382e
YK		 2610 return NULL;
2611 }
2612 }
2613
a0d0e21e 2614 if (!(AMGf_noleft & flags) && SvAMAGIC(left)
25716404 2615 && (stash = SvSTASH(SvRV(left)))
ad64d0ec 2616 && (mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table))
b267980d 2617 && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr)
a6006777 2618 ? (oamtp = amtp = (AMT*)mg->mg_ptr)->table
d4c19fe8 2619 : NULL))
b267980d 2620 && ((cv = cvp[off=method+assignshift])
748a9306
LW		 2621 || (assign && amtp->fallback > AMGfallNEVER && /* fallback to
2622 * usual method */
497b47a8
JH		 2623 (
2624#ifdef DEBUGGING
2625 fl = 1,
a0288114 2626#endif
497b47a8 2627 cv = cvp[off=method])))) {
a0d0e21e
LW		 2628 lr = -1; /* Call method for left argument */
2629 } else {
2630 if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) {
2631 int logic;
2632
2633 /* look for substituted methods */
ee239bfe 2634 /* In all the covered cases we should be called with assign==0. */
a0d0e21e
LW		 2635 switch (method) {
2636 case inc_amg:
ee239bfe
IZ		 2637 force_cpy = 1;
2638 if ((cv = cvp[off=add_ass_amg])
2639 || ((cv = cvp[off = add_amg]) && (force_cpy = 0, postpr = 1))) {
3280af22 2640 right = &PL_sv_yes; lr = -1; assign = 1;
a0d0e21e
LW		 2641 }
2642 break;
2643 case dec_amg:
ee239bfe
IZ		 2644 force_cpy = 1;
2645 if ((cv = cvp[off = subtr_ass_amg])
2646 || ((cv = cvp[off = subtr_amg]) && (force_cpy = 0, postpr=1))) {
3280af22 2647 right = &PL_sv_yes; lr = -1; assign = 1;
a0d0e21e
LW		 2648 }
2649 break;
2650 case bool__amg:
2651 (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg]));
2652 break;
2653 case numer_amg:
2654 (void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg]));
2655 break;
2656 case string_amg:
2657 (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg]));
2658 break;
b7787f18
AL		 2659 case not_amg:
2660 (void)((cv = cvp[off=bool__amg])
2661 || (cv = cvp[off=numer_amg])
2662 || (cv = cvp[off=string_amg]));
2ab54efd
MB		 2663 if (cv)
2664 postpr = 1;
b7787f18 2665 break;
748a9306
LW		 2666 case copy_amg:
2667 {
76e3520e
GS		 2668 /*
2669 * SV* ref causes confusion with the interpreter variable of
2670 * the same name
2671 */
890ce7af 2672 SV* const tmpRef=SvRV(left);
76e3520e 2673 if (!SvROK(tmpRef) && SvTYPE(tmpRef) <= SVt_PVMG) {
fc36a67e 2674 /*
2675 * Just to be extra cautious. Maybe in some
2676 * additional cases sv_setsv is safe, too.
2677 */
890ce7af 2678 SV* const newref = newSVsv(tmpRef);
748a9306 2679 SvOBJECT_on(newref);
96d4b0ee
NC		 2680 /* As a bit of a source compatibility hack, SvAMAGIC() and
2681 friends dereference an RV, to behave the same was as when
2682 overloading was stored on the reference, not the referant.
2683 Hence we can't use SvAMAGIC_on()
2684 */
2685 SvFLAGS(newref) |= SVf_AMAGIC;
85fbaab2 2686 SvSTASH_set(newref, MUTABLE_HV(SvREFCNT_inc(SvSTASH(tmpRef))));
748a9306
LW		 2687 return newref;
2688 }
2689 }
2690 break;
a0d0e21e 2691 case abs_amg:
b267980d 2692 if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg])
a0d0e21e 2693 && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) {
890ce7af 2694 SV* const nullsv=sv_2mortal(newSViv(0));
a0d0e21e 2695 if (off1==lt_amg) {
890ce7af 2696 SV* const lessp = amagic_call(left,nullsv,
a0d0e21e
LW		 2697 lt_amg,AMGf_noright);
2698 logic = SvTRUE(lessp);
2699 } else {
890ce7af 2700 SV* const lessp = amagic_call(left,nullsv,
a0d0e21e
LW		 2701 ncmp_amg,AMGf_noright);
2702 logic = (SvNV(lessp) < 0);
2703 }
2704 if (logic) {
2705 if (off==subtr_amg) {
2706 right = left;
748a9306 2707 left = nullsv;
a0d0e21e
LW		 2708 lr = 1;
2709 }
2710 } else {
2711 return left;
2712 }
2713 }
2714 break;
2715 case neg_amg:
155aba94 2716 if ((cv = cvp[off=subtr_amg])) {
a0d0e21e
LW		 2717 right = left;
2718 left = sv_2mortal(newSViv(0));
2719 lr = 1;
2720 }
2721 break;
f216259d 2722 case int_amg:
f5284f61 2723 case iter_amg: /* XXXX Eventually should do to_gv. */
c4c7412c 2724 case ftest_amg: /* XXXX Eventually should do to_gv. */
d4b87e75 2725 case regexp_amg:
b267980d
NIS		 2726 /* FAIL safe */
2727 return NULL; /* Delegate operation to standard mechanisms. */
2728 break;
f5284f61
IZ		 2729 case to_sv_amg:
2730 case to_av_amg:
2731 case to_hv_amg:
2732 case to_gv_amg:
2733 case to_cv_amg:
2734 /* FAIL safe */
b267980d 2735 return left; /* Delegate operation to standard mechanisms. */
f5284f61 2736 break;
a0d0e21e
LW		 2737 default:
2738 goto not_found;
2739 }
2740 if (!cv) goto not_found;
2741 } else if (!(AMGf_noright & flags) && SvAMAGIC(right)
25716404 2742 && (stash = SvSTASH(SvRV(right)))
ad64d0ec 2743 && (mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table))
b267980d 2744 && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr)
a6006777 2745 ? (amtp = (AMT*)mg->mg_ptr)->table
d4c19fe8 2746 : NULL))
a0d0e21e
LW		 2747 && (cv = cvp[off=method])) { /* Method for right
2748 * argument found */
2749 lr=1;
bf5522a1
MB		 2750 } else if (((cvp && amtp->fallback > AMGfallNEVER)
2751 || (ocvp && oamtp->fallback > AMGfallNEVER))
a0d0e21e
LW		 2752 && !(flags & AMGf_unary)) {
2753 /* We look for substitution for
2754 * comparison operations and
fc36a67e 2755 * concatenation */
a0d0e21e
LW		 2756 if (method==concat_amg || method==concat_ass_amg
2757 || method==repeat_amg || method==repeat_ass_amg) {
2758 return NULL; /* Delegate operation to string conversion */
2759 }
2760 off = -1;
2761 switch (method) {
2762 case lt_amg:
2763 case le_amg:
2764 case gt_amg:
2765 case ge_amg:
2766 case eq_amg:
2767 case ne_amg:
2ab54efd
MB		 2768 off = ncmp_amg;
2769 break;
a0d0e21e
LW		 2770 case slt_amg:
2771 case sle_amg:
2772 case sgt_amg:
2773 case sge_amg:
2774 case seq_amg:
2775 case sne_amg:
2ab54efd
MB		 2776 off = scmp_amg;
2777 break;
a0d0e21e 2778 }
bf5522a1
MB		 2779 if (off != -1) {
2780 if (ocvp && (oamtp->fallback > AMGfallNEVER)) {
2781 cv = ocvp[off];
2782 lr = -1;
2783 }
2784 if (!cv && (cvp && amtp->fallback > AMGfallNEVER)) {
2785 cv = cvp[off];
2786 lr = 1;
2787 }
2788 }
2789 if (cv)
2ab54efd
MB		 2790 postpr = 1;
2791 else
2792 goto not_found;
a0d0e21e 2793 } else {
a6006777 2794 not_found: /* No method found, either report or croak */
b267980d
NIS		 2795 switch (method) {
2796 case to_sv_amg:
2797 case to_av_amg:
2798 case to_hv_amg:
2799 case to_gv_amg:
2800 case to_cv_amg:
2801 /* FAIL safe */
2802 return left; /* Delegate operation to standard mechanisms. */
2803 break;
2804 }
a0d0e21e
LW		 2805 if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */
2806 notfound = 1; lr = -1;
2807 } else if (cvp && (cv=cvp[nomethod_amg])) {
2808 notfound = 1; lr = 1;
bf5522a1
MB		 2809 } else if ((use_default_op =
2810 (!ocvp || oamtp->fallback >= AMGfallYES)
2811 && (!cvp || amtp->fallback >= AMGfallYES))
2812 && !DEBUG_o_TEST) {
4cc0ca18
NC		 2813 /* Skip generating the "no method found" message. */
2814 return NULL;
a0d0e21e 2815 } else {
46fc3d4c 2816 SV *msg;
774d564b 2817 if (off==-1) off=method;
b267980d 2818 msg = sv_2mortal(Perl_newSVpvf(aTHX_
d66cca07
BF		 2819 "Operation \"%s\": no method found,%sargument %s%"SVf"%s%"SVf,
2820 AMG_id2name(method + assignshift),
2821 (flags & AMGf_unary ? " " : "\n\tleft "),
2822 SvAMAGIC(left)?
2823 "in overloaded package ":
2824 "has no overloaded magic",
2825 SvAMAGIC(left)?
2826 SVfARG(sv_2mortal(newSVhek(HvNAME_HEK(SvSTASH(SvRV(left)))))):
2827 SVfARG(&PL_sv_no),
2828 SvAMAGIC(right)?
2829 ",\n\tright argument in overloaded package ":
2830 (flags & AMGf_unary
2831 ? ""
2832 : ",\n\tright argument has no overloaded magic"),
2833 SvAMAGIC(right)?
2834 SVfARG(sv_2mortal(newSVhek(HvNAME_HEK(SvSTASH(SvRV(right)))))):
2835 SVfARG(&PL_sv_no)));
bf5522a1 2836 if (use_default_op) {
d66cca07 2837 DEBUG_o( Perl_deb(aTHX_ "%"SVf, SVfARG(msg)) );
a0d0e21e 2838 } else {
be2597df 2839 Perl_croak(aTHX_ "%"SVf, SVfARG(msg));
a0d0e21e
LW		 2840 }
2841 return NULL;
2842 }
ee239bfe 2843 force_cpy = force_cpy || assign;
a0d0e21e
LW		 2844 }
2845 }
497b47a8 2846#ifdef DEBUGGING
a0d0e21e 2847 if (!notfound) {
497b47a8 2848 DEBUG_o(Perl_deb(aTHX_
d66cca07 2849 "Overloaded operator \"%s\"%s%s%s:\n\tmethod%s found%s in package %"SVf"%s\n",
497b47a8
JH		 2850 AMG_id2name(off),
2851 method+assignshift==off? "" :
a0288114 2852 " (initially \"",
497b47a8
JH		 2853 method+assignshift==off? "" :
2854 AMG_id2name(method+assignshift),
a0288114 2855 method+assignshift==off? "" : "\")",
497b47a8
JH		 2856 flags & AMGf_unary? "" :
2857 lr==1 ? " for right argument": " for left argument",
2858 flags & AMGf_unary? " for argument" : "",
d66cca07 2859 stash ? SVfARG(sv_2mortal(newSVhek(HvNAME_HEK(stash)))) : SVfARG(newSVpvs_flags("null", SVs_TEMP)),
497b47a8 2860 fl? ",\n\tassignment variant used": "") );
ee239bfe 2861 }
497b47a8 2862#endif
748a9306
LW		 2863 /* Since we use shallow copy during assignment, we need
2864 * to dublicate the contents, probably calling user-supplied
2865 * version of copy operator
2866 */
ee239bfe
IZ		 2867 /* We need to copy in following cases:
2868 * a) Assignment form was called.
2869 * assignshift==1, assign==T, method + 1 == off
2870 * b) Increment or decrement, called directly.
2871 * assignshift==0, assign==0, method + 0 == off
2872 * c) Increment or decrement, translated to assignment add/subtr.
b267980d 2873 * assignshift==0, assign==T,
ee239bfe
IZ		 2874 * force_cpy == T
2875 * d) Increment or decrement, translated to nomethod.
b267980d 2876 * assignshift==0, assign==0,
ee239bfe
IZ		 2877 * force_cpy == T
2878 * e) Assignment form translated to nomethod.
2879 * assignshift==1, assign==T, method + 1 != off
2880 * force_cpy == T
2881 */
2882 /* off is method, method+assignshift, or a result of opcode substitution.
2883 * In the latter case assignshift==0, so only notfound case is important.
2884 */
73512201 2885 if ( (lr == -1) && ( ( (method + assignshift == off)
ee239bfe 2886 && (assign || (method == inc_amg) || (method == dec_amg)))
73512201 2887 || force_cpy) )
6f1401dc 2888 {
1b38c28e
NC		 2889 /* newSVsv does not behave as advertised, so we copy missing
2890 * information by hand */
2891 SV *tmpRef = SvRV(left);
2892 SV *rv_copy;
31d632c3 2893 if (SvREFCNT(tmpRef) > 1 && (rv_copy = AMG_CALLunary(left,copy_amg))) {
1b38c28e
NC		 2894 SvRV_set(left, rv_copy);
2895 SvSETMAGIC(left);
2896 SvREFCNT_dec(tmpRef);
2897 }
6f1401dc
DM		 2898 }
2899
a0d0e21e
LW		 2900 {
2901 dSP;
2902 BINOP myop;
2903 SV* res;
b7787f18 2904 const bool oldcatch = CATCH_GET;
a0d0e21e 2905
54310121 2906 CATCH_SET(TRUE);
a0d0e21e
LW		 2907 Zero(&myop, 1, BINOP);
2908 myop.op_last = (OP *) &myop;
b37c2d43 2909 myop.op_next = NULL;
54310121 2910 myop.op_flags = OPf_WANT_SCALAR | OPf_STACKED;
a0d0e21e 2911
e788e7d3 2912 PUSHSTACKi(PERLSI_OVERLOAD);
a0d0e21e 2913 ENTER;
462e5cf6 2914 SAVEOP();
533c011a 2915 PL_op = (OP *) &myop;
3280af22 2916 if (PERLDB_SUB && PL_curstash != PL_debstash)
533c011a 2917 PL_op->op_private |= OPpENTERSUB_DB;
a0d0e21e 2918 PUTBACK;
897d3989 2919 Perl_pp_pushmark(aTHX);
a0d0e21e 2920
924508f0 2921 EXTEND(SP, notfound + 5);
a0d0e21e
LW		 2922 PUSHs(lr>0? right: left);
2923 PUSHs(lr>0? left: right);
3280af22 2924 PUSHs( lr > 0 ? &PL_sv_yes : ( assign ? &PL_sv_undef : &PL_sv_no ));
a0d0e21e 2925 if (notfound) {
59cd0e26
NC		 2926 PUSHs(newSVpvn_flags(AMG_id2name(method + assignshift),
2927 AMG_id2namelen(method + assignshift), SVs_TEMP));
a0d0e21e 2928 }
ad64d0ec 2929 PUSHs(MUTABLE_SV(cv));
a0d0e21e
LW		 2930 PUTBACK;
2931
139d0ce6 2932 if ((PL_op = PL_ppaddr[OP_ENTERSUB](aTHX)))
cea2e8a9 2933 CALLRUNOPS(aTHX);
a0d0e21e
LW		 2934 LEAVE;
2935 SPAGAIN;
2936
2937 res=POPs;
ebafeae7 2938 PUTBACK;
d3acc0f7 2939 POPSTACK;
54310121 2940 CATCH_SET(oldcatch);
a0d0e21e 2941
a0d0e21e 2942 if (postpr) {
b7787f18 2943 int ans;
a0d0e21e
LW		 2944 switch (method) {
2945 case le_amg:
2946 case sle_amg:
2947 ans=SvIV(res)<=0; break;
2948 case lt_amg:
2949 case slt_amg:
2950 ans=SvIV(res)<0; break;
2951 case ge_amg:
2952 case sge_amg:
2953 ans=SvIV(res)>=0; break;
2954 case gt_amg:
2955 case sgt_amg:
2956 ans=SvIV(res)>0; break;
2957 case eq_amg:
2958 case seq_amg:
2959 ans=SvIV(res)==0; break;
2960 case ne_amg:
2961 case sne_amg:
2962 ans=SvIV(res)!=0; break;
2963 case inc_amg:
2964 case dec_amg:
bbce6d69 2965 SvSetSV(left,res); return left;
dc437b57 2966 case not_amg:
fe7ac86a 2967 ans=!SvTRUE(res); break;
b7787f18
AL		 2968 default:
2969 ans=0; break;
a0d0e21e 2970 }
54310121 2971 return boolSV(ans);
748a9306
LW		 2972 } else if (method==copy_amg) {
2973 if (!SvROK(res)) {
cea2e8a9 2974 Perl_croak(aTHX_ "Copy method did not return a reference");
748a9306
LW		 2975 }
2976 return SvREFCNT_inc(SvRV(res));
a0d0e21e
LW		 2977 } else {
2978 return res;
2979 }
2980 }
2981}
c9d5ac95 2982
f5c1e807
NC		 2983void
2984Perl_gv_name_set(pTHX_ GV *gv, const char *name, U32 len, U32 flags)
2985{
2986 dVAR;
acda4c6a 2987 U32 hash;
f5c1e807 2988
7918f24d 2989 PERL_ARGS_ASSERT_GV_NAME_SET;
f5c1e807 2990
acda4c6a
NC		 2991 if (len > I32_MAX)
2992 Perl_croak(aTHX_ "panic: gv name too long (%"UVuf")", (UV) len);
2993
ae8cc45f
NC		 2994 if (!(flags & GV_ADD) && GvNAME_HEK(gv)) {
2995 unshare_hek(GvNAME_HEK(gv));
2996 }
2997
acda4c6a 2998 PERL_HASH(hash, name, len);
c60dbbc3 2999 GvNAME_HEK(gv) = share_hek(name, (flags & SVf_UTF8 ? -(I32)len : (I32)len), hash);
f5c1e807
NC		 3000}
3001
66610fdd 3002/*
f7461760
Z		 3003=for apidoc gv_try_downgrade
3004
2867cdbc
Z		 3005If the typeglob C<gv> can be expressed more succinctly, by having
3006something other than a real GV in its place in the stash, replace it
3007with the optimised form. Basic requirements for this are that C<gv>
3008is a real typeglob, is sufficiently ordinary, and is only referenced
3009from its package. This function is meant to be used when a GV has been
3010looked up in part to see what was there, causing upgrading, but based
3011on what was found it turns out that the real GV isn't required after all.
3012
3013If C<gv> is a completely empty typeglob, it is deleted from the stash.
3014
3015If C<gv> is a typeglob containing only a sufficiently-ordinary constant
3016sub, the typeglob is replaced with a scalar-reference placeholder that
3017more compactly represents the same thing.
f7461760
Z		 3018
3019=cut
3020*/
3021
3022void
3023Perl_gv_try_downgrade(pTHX_ GV *gv)
3024{
3025 HV *stash;
3026 CV *cv;
3027 HEK *namehek;
3028 SV **gvp;
3029 PERL_ARGS_ASSERT_GV_TRY_DOWNGRADE;
95f56751
FC		 3030
3031 /* XXX Why and where does this leave dangling pointers during global
3032 destruction? */
627364f1 3033 if (PL_phase == PERL_PHASE_DESTRUCT) return;
95f56751 3034
2867cdbc 3035 if (!(SvREFCNT(gv) == 1 && SvTYPE(gv) == SVt_PVGV && !SvFAKE(gv) &&
803f2748 3036 !SvOBJECT(gv) && !SvREADONLY(gv) &&
f7461760 3037 isGV_with_GP(gv) && GvGP(gv) &&
2867cdbc 3038 !GvINTRO(gv) && GvREFCNT(gv) == 1 &&
f7461760 3039 !GvSV(gv) && !GvAV(gv) && !GvHV(gv) && !GvIOp(gv) && !GvFORM(gv) &&
099be4f1 3040 GvEGVx(gv) == gv && (stash = GvSTASH(gv))))
2867cdbc 3041 return;
803f2748
DM		 3042 if (SvMAGICAL(gv)) {
3043 MAGIC *mg;
3044 /* only backref magic is allowed */
3045 if (SvGMAGICAL(gv) || SvSMAGICAL(gv))
3046 return;
3047 for (mg = SvMAGIC(gv); mg; mg = mg->mg_moremagic) {
3048 if (mg->mg_type != PERL_MAGIC_backref)
3049 return;
3050 }
3051 }
2867cdbc
Z		 3052 cv = GvCV(gv);
3053 if (!cv) {
3054 HEK *gvnhek = GvNAME_HEK(gv);
3055 (void)hv_delete(stash, HEK_KEY(gvnhek),
3056 HEK_UTF8(gvnhek) ? -HEK_LEN(gvnhek) : HEK_LEN(gvnhek), G_DISCARD);
3057 } else if (GvMULTI(gv) && cv &&
f7461760
Z		 3058 !SvOBJECT(cv) && !SvMAGICAL(cv) && !SvREADONLY(cv) &&
3059 CvSTASH(cv) == stash && CvGV(cv) == gv &&
3060 CvCONST(cv) && !CvMETHOD(cv) && !CvLVALUE(cv) && !CvUNIQUE(cv) &&
3061 !CvNODEBUG(cv) && !CvCLONE(cv) && !CvCLONED(cv) && !CvANON(cv) &&
3062 (namehek = GvNAME_HEK(gv)) &&
3063 (gvp = hv_fetch(stash, HEK_KEY(namehek),
3064 HEK_LEN(namehek)*(HEK_UTF8(namehek) ? -1 : 1), 0)) &&
3065 *gvp == (SV*)gv) {
3066 SV *value = SvREFCNT_inc(CvXSUBANY(cv).any_ptr);
3067 SvREFCNT(gv) = 0;
3068 sv_clear((SV*)gv);
3069 SvREFCNT(gv) = 1;
3070 SvFLAGS(gv) = SVt_IV|SVf_ROK;
3071 SvANY(gv) = (XPVGV*)((char*)&(gv->sv_u.svu_iv) -
3072 STRUCT_OFFSET(XPVIV, xiv_iv));
3073 SvRV_set(gv, value);
3074 }
3075}
3076
4aaa4757
FC		 3077#include "XSUB.h"
3078
3079static void
3080core_xsub(pTHX_ CV* cv)
3081{
3082 Perl_croak(aTHX_
3083 "&CORE::%s cannot be called directly", GvNAME(CvGV(cv))
3084 );
3085}
3086
f7461760 3087/*
66610fdd
RGS		 3088 * Local variables:
3089 * c-indentation-style: bsd
3090 * c-basic-offset: 4
3091 * indent-tabs-mode: t
3092 * End:
3093 *
37442d52
RGS		 3094 * ex: set ts=8 sts=4 sw=4 noet:
3095 */
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