3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
4 * 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 by Larry Wall and others
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.
12 * 'Mercy!' cried Gandalf. 'If the giving of information is to be the cure
13 * of your inquisitiveness, I shall spend all the rest of my days in answering
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,'
19 * [p.599 of _The Lord of the Rings_, III/xi: "The PalantÃr"]
25 A GV is a structure which corresponds to to a Perl typeglob, ie *foo.
26 It is a structure that holds a pointer to a scalar, an array, a hash etc,
27 corresponding to $foo, @foo, %foo.
29 GVs are usually found as values in stashes (symbol table hashes) where
30 Perl stores its global variables.
40 static const char S_autoload[] = "AUTOLOAD";
41 static const STRLEN S_autolen = sizeof(S_autoload)-1;
44 Perl_gv_add_by_type(pTHX_ GV *gv, svtype type)
51 SvTYPE((const SV *)gv) != SVt_PVGV
52 && SvTYPE((const SV *)gv) != SVt_PVLV
56 if (type == SVt_PVIO) {
58 * if it walks like a dirhandle, then let's assume that
59 * this is a dirhandle.
61 what = PL_op->op_type == OP_READDIR ||
62 PL_op->op_type == OP_TELLDIR ||
63 PL_op->op_type == OP_SEEKDIR ||
64 PL_op->op_type == OP_REWINDDIR ||
65 PL_op->op_type == OP_CLOSEDIR ?
66 "dirhandle" : "filehandle";
67 /* diag_listed_as: Bad symbol for filehandle */
68 } else if (type == SVt_PVHV) {
71 what = type == SVt_PVAV ? "array" : "scalar";
73 Perl_croak(aTHX_ "Bad symbol for %s", what);
76 if (type == SVt_PVHV) {
77 where = (SV **)&GvHV(gv);
78 } else if (type == SVt_PVAV) {
79 where = (SV **)&GvAV(gv);
80 } else if (type == SVt_PVIO) {
81 where = (SV **)&GvIOp(gv);
87 *where = newSV_type(type);
92 Perl_gv_fetchfile(pTHX_ const char *name)
94 PERL_ARGS_ASSERT_GV_FETCHFILE;
95 return gv_fetchfile_flags(name, strlen(name), 0);
99 Perl_gv_fetchfile_flags(pTHX_ const char *const name, const STRLEN namelen,
105 const STRLEN tmplen = namelen + 2;
108 PERL_ARGS_ASSERT_GV_FETCHFILE_FLAGS;
109 PERL_UNUSED_ARG(flags);
114 if (tmplen <= sizeof smallbuf)
117 Newx(tmpbuf, tmplen, char);
118 /* This is where the debugger's %{"::_<$filename"} hash is created */
121 memcpy(tmpbuf + 2, name, namelen);
122 gv = *(GV**)hv_fetch(PL_defstash, tmpbuf, tmplen, TRUE);
124 gv_init(gv, PL_defstash, tmpbuf, tmplen, FALSE);
125 #ifdef PERL_DONT_CREATE_GVSV
126 GvSV(gv) = newSVpvn(name, namelen);
128 sv_setpvn(GvSV(gv), name, namelen);
131 if ((PERLDB_LINE || PERLDB_SAVESRC) && !GvAV(gv))
132 hv_magic(GvHVn(gv_AVadd(gv)), NULL, PERL_MAGIC_dbfile);
133 if (tmpbuf != smallbuf)
139 =for apidoc gv_const_sv
141 If C<gv> is a typeglob whose subroutine entry is a constant sub eligible for
142 inlining, or C<gv> is a placeholder reference that would be promoted to such
143 a typeglob, then returns the value returned by the sub. Otherwise, returns
150 Perl_gv_const_sv(pTHX_ GV *gv)
152 PERL_ARGS_ASSERT_GV_CONST_SV;
154 if (SvTYPE(gv) == SVt_PVGV)
155 return cv_const_sv(GvCVu(gv));
156 return SvROK(gv) ? SvRV(gv) : NULL;
160 Perl_newGP(pTHX_ GV *const gv)
165 const char *const file
166 = (PL_curcop && CopFILE(PL_curcop)) ? CopFILE(PL_curcop) : "";
167 const STRLEN len = strlen(file);
169 SV *const temp_sv = CopFILESV(PL_curcop);
173 PERL_ARGS_ASSERT_NEWGP;
176 file = SvPVX(temp_sv);
177 len = SvCUR(temp_sv);
184 PERL_HASH(hash, file, len);
188 #ifndef PERL_DONT_CREATE_GVSV
189 gp->gp_sv = newSV(0);
192 gp->gp_line = PL_curcop ? CopLINE(PL_curcop) : 0;
193 /* XXX Ideally this cast would be replaced with a change to const char*
195 gp->gp_file_hek = share_hek(file, len, hash);
202 /* Assign CvGV(cv) = gv, handling weak references.
203 * See also S_anonymise_cv_maybe */
206 Perl_cvgv_set(pTHX_ CV* cv, GV* gv)
208 GV * const oldgv = CvGV(cv);
209 PERL_ARGS_ASSERT_CVGV_SET;
220 sv_del_backref(MUTABLE_SV(oldgv), MUTABLE_SV(cv));
224 SvANY(cv)->xcv_gv = gv;
225 assert(!CvCVGV_RC(cv));
230 if (isGV_with_GP(gv) && GvGP(gv) && (GvCV(gv) == cv || GvFORM(gv) == cv))
231 Perl_sv_add_backref(aTHX_ MUTABLE_SV(gv), MUTABLE_SV(cv));
234 SvREFCNT_inc_simple_void_NN(gv);
238 /* Assign CvSTASH(cv) = st, handling weak references. */
241 Perl_cvstash_set(pTHX_ CV *cv, HV *st)
243 HV *oldst = CvSTASH(cv);
244 PERL_ARGS_ASSERT_CVSTASH_SET;
248 sv_del_backref(MUTABLE_SV(oldst), MUTABLE_SV(cv));
249 SvANY(cv)->xcv_stash = st;
251 Perl_sv_add_backref(aTHX_ MUTABLE_SV(st), MUTABLE_SV(cv));
255 Perl_gv_init(pTHX_ GV *gv, HV *stash, const char *name, STRLEN len, int multi)
258 const U32 old_type = SvTYPE(gv);
259 const bool doproto = old_type > SVt_NULL;
260 char * const proto = (doproto && SvPOK(gv)) ? SvPVX(gv) : NULL;
261 const STRLEN protolen = proto ? SvCUR(gv) : 0;
262 SV *const has_constant = doproto && SvROK(gv) ? SvRV(gv) : NULL;
263 const U32 exported_constant = has_constant ? SvPCS_IMPORTED(gv) : 0;
265 PERL_ARGS_ASSERT_GV_INIT;
266 assert (!(proto && has_constant));
269 /* The constant has to be a simple scalar type. */
270 switch (SvTYPE(has_constant)) {
276 Perl_croak(aTHX_ "Cannot convert a reference to %s to typeglob",
277 sv_reftype(has_constant, 0));
285 if (old_type < SVt_PVGV) {
286 if (old_type >= SVt_PV)
288 sv_upgrade(MUTABLE_SV(gv), SVt_PVGV);
296 Safefree(SvPVX_mutable(gv));
301 GvGP(gv) = Perl_newGP(aTHX_ gv);
304 Perl_sv_add_backref(aTHX_ MUTABLE_SV(stash), MUTABLE_SV(gv));
305 gv_name_set(gv, name, len, GV_ADD);
306 if (multi || doproto) /* doproto means it _was_ mentioned */
308 if (doproto) { /* Replicate part of newSUB here. */
314 /* newCONSTSUB doesn't take a len arg, so make sure we
315 * give it a \0-terminated string */
316 name0 = savepvn(name,len);
318 /* newCONSTSUB takes ownership of the reference from us. */
319 cv = newCONSTSUB(stash, (name0 ? name0 : name), has_constant);
320 /* In case op.c:S_process_special_blocks stole it: */
322 GvCV(gv) = (CV *)SvREFCNT_inc_simple_NN(cv);
323 assert(GvCV(gv) == cv); /* newCONSTSUB should have set this */
326 /* If this reference was a copy of another, then the subroutine
327 must have been "imported", by a Perl space assignment to a GV
328 from a reference to CV. */
329 if (exported_constant)
330 GvIMPORTED_CV_on(gv);
332 (void) start_subparse(0,0); /* Create empty CV in compcv. */
338 mro_method_changed_in(GvSTASH(gv)); /* sub Foo::bar($) { (shift) } sub ASDF::baz($); *ASDF::baz = \&Foo::bar */
340 CvFILE_set_from_cop(cv, PL_curcop);
341 CvSTASH_set(cv, PL_curstash);
343 sv_usepvn_flags(MUTABLE_SV(cv), proto, protolen,
344 SV_HAS_TRAILING_NUL);
350 S_gv_init_sv(pTHX_ GV *gv, const svtype sv_type)
352 PERL_ARGS_ASSERT_GV_INIT_SV;
364 #ifdef PERL_DONT_CREATE_GVSV
372 /* Work round what appears to be a bug in Sun C++ 5.8 2005/10/13
373 If we just cast GvSVn(gv) to void, it ignores evaluating it for
381 =for apidoc gv_fetchmeth
383 Returns the glob with the given C<name> and a defined subroutine or
384 C<NULL>. The glob lives in the given C<stash>, or in the stashes
385 accessible via @ISA and UNIVERSAL::.
387 The argument C<level> should be either 0 or -1. If C<level==0>, as a
388 side-effect creates a glob with the given C<name> in the given C<stash>
389 which in the case of success contains an alias for the subroutine, and sets
390 up caching info for this glob.
392 This function grants C<"SUPER"> token as a postfix of the stash name. The
393 GV returned from C<gv_fetchmeth> may be a method cache entry, which is not
394 visible to Perl code. So when calling C<call_sv>, you should not use
395 the GV directly; instead, you should use the method's CV, which can be
396 obtained from the GV with the C<GvCV> macro.
401 /* NOTE: No support for tied ISA */
404 Perl_gv_fetchmeth(pTHX_ HV *stash, const char *name, STRLEN len, I32 level)
412 GV* candidate = NULL;
417 I32 create = (level >= 0) ? 1 : 0;
422 PERL_ARGS_ASSERT_GV_FETCHMETH;
424 /* UNIVERSAL methods should be callable without a stash */
426 create = 0; /* probably appropriate */
427 if(!(stash = gv_stashpvs("UNIVERSAL", 0)))
433 hvname = HvNAME_get(stash);
435 Perl_croak(aTHX_ "Can't use anonymous symbol table for method lookup");
440 DEBUG_o( Perl_deb(aTHX_ "Looking for method %s in package %s\n",name,hvname) );
442 topgen_cmp = HvMROMETA(stash)->cache_gen + PL_sub_generation;
444 /* check locally for a real method or a cache entry */
445 gvp = (GV**)hv_fetch(stash, name, len, create);
449 if (SvTYPE(topgv) != SVt_PVGV)
450 gv_init(topgv, stash, name, len, TRUE);
451 if ((cand_cv = GvCV(topgv))) {
452 /* If genuine method or valid cache entry, use it */
453 if (!GvCVGEN(topgv) || GvCVGEN(topgv) == topgen_cmp) {
457 /* stale cache entry, junk it and move on */
458 SvREFCNT_dec(cand_cv);
459 GvCV(topgv) = cand_cv = NULL;
463 else if (GvCVGEN(topgv) == topgen_cmp) {
464 /* cache indicates no such method definitively */
469 packlen = HvNAMELEN_get(stash);
470 if (packlen >= 7 && strEQ(hvname + packlen - 7, "::SUPER")) {
473 basestash = gv_stashpvn(hvname, packlen, GV_ADD);
474 linear_av = mro_get_linear_isa(basestash);
477 linear_av = mro_get_linear_isa(stash); /* has ourselves at the top of the list */
480 linear_svp = AvARRAY(linear_av) + 1; /* skip over self */
481 items = AvFILLp(linear_av); /* no +1, to skip over self */
483 linear_sv = *linear_svp++;
485 cstash = gv_stashsv(linear_sv, 0);
488 Perl_ck_warner(aTHX_ packWARN(WARN_SYNTAX), "Can't locate package %"SVf" for @%s::ISA",
489 SVfARG(linear_sv), hvname);
495 gvp = (GV**)hv_fetch(cstash, name, len, 0);
499 if (SvTYPE(candidate) != SVt_PVGV) gv_init(candidate, cstash, name, len, TRUE);
500 if (SvTYPE(candidate) == SVt_PVGV && (cand_cv = GvCV(candidate)) && !GvCVGEN(candidate)) {
502 * Found real method, cache method in topgv if:
503 * 1. topgv has no synonyms (else inheritance crosses wires)
504 * 2. method isn't a stub (else AUTOLOAD fails spectacularly)
506 if (topgv && (GvREFCNT(topgv) == 1) && (CvROOT(cand_cv) || CvXSUB(cand_cv))) {
507 if ((old_cv = GvCV(topgv))) SvREFCNT_dec(old_cv);
508 SvREFCNT_inc_simple_void_NN(cand_cv);
509 GvCV(topgv) = cand_cv;
510 GvCVGEN(topgv) = topgen_cmp;
516 /* Check UNIVERSAL without caching */
517 if(level == 0 || level == -1) {
518 candidate = gv_fetchmeth(NULL, name, len, 1);
520 cand_cv = GvCV(candidate);
521 if (topgv && (GvREFCNT(topgv) == 1) && (CvROOT(cand_cv) || CvXSUB(cand_cv))) {
522 if ((old_cv = GvCV(topgv))) SvREFCNT_dec(old_cv);
523 SvREFCNT_inc_simple_void_NN(cand_cv);
524 GvCV(topgv) = cand_cv;
525 GvCVGEN(topgv) = topgen_cmp;
531 if (topgv && GvREFCNT(topgv) == 1) {
532 /* cache the fact that the method is not defined */
533 GvCVGEN(topgv) = topgen_cmp;
540 =for apidoc gv_fetchmeth_autoload
542 Same as gv_fetchmeth(), but looks for autoloaded subroutines too.
543 Returns a glob for the subroutine.
545 For an autoloaded subroutine without a GV, will create a GV even
546 if C<level < 0>. For an autoloaded subroutine without a stub, GvCV()
547 of the result may be zero.
553 Perl_gv_fetchmeth_autoload(pTHX_ HV *stash, const char *name, STRLEN len, I32 level)
555 GV *gv = gv_fetchmeth(stash, name, len, level);
557 PERL_ARGS_ASSERT_GV_FETCHMETH_AUTOLOAD;
564 return NULL; /* UNIVERSAL::AUTOLOAD could cause trouble */
565 if (len == S_autolen && memEQ(name, S_autoload, S_autolen))
567 if (!(gv = gv_fetchmeth(stash, S_autoload, S_autolen, FALSE)))
570 if (!(CvROOT(cv) || CvXSUB(cv)))
572 /* Have an autoload */
573 if (level < 0) /* Cannot do without a stub */
574 gv_fetchmeth(stash, name, len, 0);
575 gvp = (GV**)hv_fetch(stash, name, len, (level >= 0));
584 =for apidoc gv_fetchmethod_autoload
586 Returns the glob which contains the subroutine to call to invoke the method
587 on the C<stash>. In fact in the presence of autoloading this may be the
588 glob for "AUTOLOAD". In this case the corresponding variable $AUTOLOAD is
591 The third parameter of C<gv_fetchmethod_autoload> determines whether
592 AUTOLOAD lookup is performed if the given method is not present: non-zero
593 means yes, look for AUTOLOAD; zero means no, don't look for AUTOLOAD.
594 Calling C<gv_fetchmethod> is equivalent to calling C<gv_fetchmethod_autoload>
595 with a non-zero C<autoload> parameter.
597 These functions grant C<"SUPER"> token as a prefix of the method name. Note
598 that if you want to keep the returned glob for a long time, you need to
599 check for it being "AUTOLOAD", since at the later time the call may load a
600 different subroutine due to $AUTOLOAD changing its value. Use the glob
601 created via a side effect to do this.
603 These functions have the same side-effects and as C<gv_fetchmeth> with
604 C<level==0>. C<name> should be writable if contains C<':'> or C<'
605 ''>. The warning against passing the GV returned by C<gv_fetchmeth> to
606 C<call_sv> apply equally to these functions.
612 S_gv_get_super_pkg(pTHX_ const char* name, I32 namelen)
619 PERL_ARGS_ASSERT_GV_GET_SUPER_PKG;
621 stash = gv_stashpvn(name, namelen, 0);
622 if(stash) return stash;
624 /* If we must create it, give it an @ISA array containing
625 the real package this SUPER is for, so that it's tied
626 into the cache invalidation code correctly */
627 stash = gv_stashpvn(name, namelen, GV_ADD);
628 gvp = (GV**)hv_fetchs(stash, "ISA", TRUE);
630 gv_init(gv, stash, "ISA", 3, TRUE);
631 superisa = GvAVn(gv);
633 sv_magic(MUTABLE_SV(superisa), MUTABLE_SV(gv), PERL_MAGIC_isa, NULL, 0);
635 av_push(superisa, newSVpv(CopSTASHPV(PL_curcop), 0));
637 av_push(superisa, newSVhek(CopSTASH(PL_curcop)
638 ? HvNAME_HEK(CopSTASH(PL_curcop)) : NULL));
645 Perl_gv_fetchmethod_autoload(pTHX_ HV *stash, const char *name, I32 autoload)
647 PERL_ARGS_ASSERT_GV_FETCHMETHOD_AUTOLOAD;
649 return gv_fetchmethod_flags(stash, name, autoload ? GV_AUTOLOAD : 0);
652 /* Don't merge this yet, as it's likely to get a len parameter, and possibly
655 Perl_gv_fetchmethod_flags(pTHX_ HV *stash, const char *name, U32 flags)
658 register const char *nend;
659 const char *nsplit = NULL;
662 const char * const origname = name;
663 SV *const error_report = MUTABLE_SV(stash);
664 const U32 autoload = flags & GV_AUTOLOAD;
665 const U32 do_croak = flags & GV_CROAK;
667 PERL_ARGS_ASSERT_GV_FETCHMETHOD_FLAGS;
669 if (SvTYPE(stash) < SVt_PVHV)
672 /* The only way stash can become NULL later on is if nsplit is set,
673 which in turn means that there is no need for a SVt_PVHV case
674 the error reporting code. */
677 for (nend = name; *nend; nend++) {
682 else if (*nend == ':' && *(nend + 1) == ':') {
688 if ((nsplit - origname) == 5 && memEQ(origname, "SUPER", 5)) {
689 /* ->SUPER::method should really be looked up in original stash */
690 SV * const tmpstr = sv_2mortal(Perl_newSVpvf(aTHX_ "%s::SUPER",
691 CopSTASHPV(PL_curcop)));
692 /* __PACKAGE__::SUPER stash should be autovivified */
693 stash = gv_get_super_pkg(SvPVX_const(tmpstr), SvCUR(tmpstr));
694 DEBUG_o( Perl_deb(aTHX_ "Treating %s as %s::%s\n",
695 origname, HvNAME_get(stash), name) );
698 /* don't autovifify if ->NoSuchStash::method */
699 stash = gv_stashpvn(origname, nsplit - origname, 0);
701 /* however, explicit calls to Pkg::SUPER::method may
702 happen, and may require autovivification to work */
703 if (!stash && (nsplit - origname) >= 7 &&
704 strnEQ(nsplit - 7, "::SUPER", 7) &&
705 gv_stashpvn(origname, nsplit - origname - 7, 0))
706 stash = gv_get_super_pkg(origname, nsplit - origname);
711 gv = gv_fetchmeth(stash, name, nend - name, 0);
713 if (strEQ(name,"import") || strEQ(name,"unimport"))
714 gv = MUTABLE_GV(&PL_sv_yes);
716 gv = gv_autoload4(ostash, name, nend - name, TRUE);
717 if (!gv && do_croak) {
718 /* Right now this is exclusively for the benefit of S_method_common
721 /* If we can't find an IO::File method, it might be a call on
722 * a filehandle. If IO:File has not been loaded, try to
723 * require it first instead of croaking */
724 const char *stash_name = HvNAME_get(stash);
725 if (stash_name && memEQs(stash_name, HvNAMELEN_get(stash), "IO::File")
726 && !Perl_hv_common(aTHX_ GvHVn(PL_incgv), NULL,
727 STR_WITH_LEN("IO/File.pm"), 0,
728 HV_FETCH_ISEXISTS, NULL, 0)
730 require_pv("IO/File.pm");
731 gv = gv_fetchmeth(stash, name, nend - name, 0);
736 "Can't locate object method \"%s\" via package \"%.*s\"",
737 name, (int)HvNAMELEN_get(stash), HvNAME_get(stash));
741 const char *packname;
744 packlen = nsplit - origname;
747 packname = SvPV_const(error_report, packlen);
751 "Can't locate object method \"%s\" via package \"%.*s\""
752 " (perhaps you forgot to load \"%.*s\"?)",
753 name, (int)packlen, packname, (int)packlen, packname);
758 CV* const cv = GvCV(gv);
759 if (!CvROOT(cv) && !CvXSUB(cv)) {
767 if (GvCV(stubgv) != cv) /* orphaned import */
770 autogv = gv_autoload4(GvSTASH(stubgv),
771 GvNAME(stubgv), GvNAMELEN(stubgv), TRUE);
781 Perl_gv_autoload4(pTHX_ HV *stash, const char *name, STRLEN len, I32 method)
789 const char *packname = "";
790 STRLEN packname_len = 0;
792 PERL_ARGS_ASSERT_GV_AUTOLOAD4;
794 if (len == S_autolen && memEQ(name, S_autoload, S_autolen))
797 if (SvTYPE(stash) < SVt_PVHV) {
798 packname = SvPV_const(MUTABLE_SV(stash), packname_len);
802 packname = HvNAME_get(stash);
803 packname_len = HvNAMELEN_get(stash);
806 if (!(gv = gv_fetchmeth(stash, S_autoload, S_autolen, FALSE)))
810 if (!(CvROOT(cv) || CvXSUB(cv)))
814 * Inheriting AUTOLOAD for non-methods works ... for now.
816 if (!method && (GvCVGEN(gv) || GvSTASH(gv) != stash)
818 Perl_ck_warner_d(aTHX_ packWARN(WARN_DEPRECATED),
819 "Use of inherited AUTOLOAD for non-method %s::%.*s() is deprecated",
820 packname, (int)len, name);
823 /* rather than lookup/init $AUTOLOAD here
824 * only to have the XSUB do another lookup for $AUTOLOAD
825 * and split that value on the last '::',
826 * pass along the same data via some unused fields in the CV
828 CvSTASH_set(cv, stash);
829 SvPV_set(cv, (char *)name); /* cast to lose constness warning */
835 * Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name.
836 * The subroutine's original name may not be "AUTOLOAD", so we don't
837 * use that, but for lack of anything better we will use the sub's
838 * original package to look up $AUTOLOAD.
840 varstash = GvSTASH(CvGV(cv));
841 vargv = *(GV**)hv_fetch(varstash, S_autoload, S_autolen, TRUE);
845 gv_init(vargv, varstash, S_autoload, S_autolen, FALSE);
846 #ifdef PERL_DONT_CREATE_GVSV
847 GvSV(vargv) = newSV(0);
851 varsv = GvSVn(vargv);
852 sv_setpvn(varsv, packname, packname_len);
853 sv_catpvs(varsv, "::");
854 sv_catpvn(varsv, name, len);
859 /* require_tie_mod() internal routine for requiring a module
860 * that implements the logic of automatical ties like %! and %-
862 * The "gv" parameter should be the glob.
863 * "varpv" holds the name of the var, used for error messages.
864 * "namesv" holds the module name. Its refcount will be decremented.
865 * "methpv" holds the method name to test for to check that things
866 * are working reasonably close to as expected.
867 * "flags": if flag & 1 then save the scalar before loading.
868 * For the protection of $! to work (it is set by this routine)
869 * the sv slot must already be magicalized.
872 S_require_tie_mod(pTHX_ GV *gv, const char *varpv, SV* namesv, const char *methpv,const U32 flags)
875 HV* stash = gv_stashsv(namesv, 0);
877 PERL_ARGS_ASSERT_REQUIRE_TIE_MOD;
879 if (!stash || !(gv_fetchmethod(stash, methpv))) {
880 SV *module = newSVsv(namesv);
881 char varname = *varpv; /* varpv might be clobbered by load_module,
882 so save it. For the moment it's always
888 PUSHSTACKi(PERLSI_MAGIC);
889 Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT, module, NULL);
893 stash = gv_stashsv(namesv, 0);
895 Perl_croak(aTHX_ "panic: Can't use %%%c because %"SVf" is not available",
896 varname, SVfARG(namesv));
897 else if (!gv_fetchmethod(stash, methpv))
898 Perl_croak(aTHX_ "panic: Can't use %%%c because %"SVf" does not support method %s",
899 varname, SVfARG(namesv), methpv);
901 SvREFCNT_dec(namesv);
906 =for apidoc gv_stashpv
908 Returns a pointer to the stash for a specified package. Uses C<strlen> to
909 determine the length of C<name>, then calls C<gv_stashpvn()>.
915 Perl_gv_stashpv(pTHX_ const char *name, I32 create)
917 PERL_ARGS_ASSERT_GV_STASHPV;
918 return gv_stashpvn(name, strlen(name), create);
922 =for apidoc gv_stashpvn
924 Returns a pointer to the stash for a specified package. The C<namelen>
925 parameter indicates the length of the C<name>, in bytes. C<flags> is passed
926 to C<gv_fetchpvn_flags()>, so if set to C<GV_ADD> then the package will be
927 created if it does not already exist. If the package does not exist and
928 C<flags> is 0 (or any other setting that does not create packages) then NULL
936 Perl_gv_stashpvn(pTHX_ const char *name, U32 namelen, I32 flags)
942 U32 tmplen = namelen + 2;
944 PERL_ARGS_ASSERT_GV_STASHPVN;
946 if (tmplen <= sizeof smallbuf)
949 Newx(tmpbuf, tmplen, char);
950 Copy(name, tmpbuf, namelen, char);
951 tmpbuf[namelen] = ':';
952 tmpbuf[namelen+1] = ':';
953 tmpgv = gv_fetchpvn_flags(tmpbuf, tmplen, flags, SVt_PVHV);
954 if (tmpbuf != smallbuf)
960 assert(HvNAME_get(stash));
965 =for apidoc gv_stashsv
967 Returns a pointer to the stash for a specified package. See C<gv_stashpvn>.
973 Perl_gv_stashsv(pTHX_ SV *sv, I32 flags)
976 const char * const ptr = SvPV_const(sv,len);
978 PERL_ARGS_ASSERT_GV_STASHSV;
980 return gv_stashpvn(ptr, len, flags);
985 Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 add, const svtype sv_type) {
986 PERL_ARGS_ASSERT_GV_FETCHPV;
987 return gv_fetchpvn_flags(nambeg, strlen(nambeg), add, sv_type);
991 Perl_gv_fetchsv(pTHX_ SV *name, I32 flags, const svtype sv_type) {
993 const char * const nambeg = SvPV_const(name, len);
994 PERL_ARGS_ASSERT_GV_FETCHSV;
995 return gv_fetchpvn_flags(nambeg, len, flags | SvUTF8(name), sv_type);
999 S_gv_magicalize_isa(pTHX_ GV *gv)
1003 PERL_ARGS_ASSERT_GV_MAGICALIZE_ISA;
1007 sv_magic(MUTABLE_SV(av), MUTABLE_SV(gv), PERL_MAGIC_isa,
1012 S_gv_magicalize_overload(pTHX_ GV *gv)
1016 PERL_ARGS_ASSERT_GV_MAGICALIZE_OVERLOAD;
1020 hv_magic(hv, NULL, PERL_MAGIC_overload);
1024 Perl_gv_fetchpvn_flags(pTHX_ const char *nambeg, STRLEN full_len, I32 flags,
1025 const svtype sv_type)
1028 register const char *name = nambeg;
1029 register GV *gv = NULL;
1032 register const char *name_cursor;
1034 const I32 no_init = flags & (GV_NOADD_NOINIT | GV_NOINIT);
1035 const I32 no_expand = flags & GV_NOEXPAND;
1036 const I32 add = flags & ~GV_NOADD_MASK;
1037 const char *const name_end = nambeg + full_len;
1038 const char *const name_em1 = name_end - 1;
1041 PERL_ARGS_ASSERT_GV_FETCHPVN_FLAGS;
1043 if (flags & GV_NOTQUAL) {
1044 /* Caller promised that there is no stash, so we can skip the check. */
1049 if (full_len > 2 && *name == '*' && isALPHA(name[1])) {
1050 /* accidental stringify on a GV? */
1054 for (name_cursor = name; name_cursor < name_end; name_cursor++) {
1055 if ((*name_cursor == ':' && name_cursor < name_em1
1056 && name_cursor[1] == ':')
1057 || (*name_cursor == '\'' && name_cursor[1]))
1060 stash = PL_defstash;
1061 if (!stash || !SvREFCNT(stash)) /* symbol table under destruction */
1064 len = name_cursor - name;
1067 if (*name_cursor == ':') {
1072 Newx(tmpbuf, len+2, char);
1073 Copy(name, tmpbuf, len, char);
1074 tmpbuf[len++] = ':';
1075 tmpbuf[len++] = ':';
1078 gvp = (GV**)hv_fetch(stash, key, len, add);
1079 gv = gvp ? *gvp : NULL;
1080 if (gv && gv != (const GV *)&PL_sv_undef) {
1081 if (SvTYPE(gv) != SVt_PVGV)
1082 gv_init(gv, stash, key, len, (add & GV_ADDMULTI));
1087 Safefree((char *)key);
1088 if (!gv || gv == (const GV *)&PL_sv_undef)
1091 if (!(stash = GvHV(gv)))
1093 stash = GvHV(gv) = newHV();
1094 if (!HvNAME_get(stash)) {
1095 hv_name_set(stash, nambeg, name_cursor-nambeg, 0);
1096 /* If the containing stash has multiple effective
1097 names, see that this one gets them, too. */
1098 if (HvAUX(GvSTASH(gv))->xhv_name_count)
1099 mro_package_moved(stash, NULL, gv, 1);
1102 else if (!HvNAME_get(stash))
1103 hv_name_set(stash, nambeg, name_cursor - nambeg, 0);
1106 if (*name_cursor == ':')
1110 if (name == name_end)
1112 ? gv : MUTABLE_GV(*hv_fetchs(PL_defstash, "main::", TRUE));
1115 len = name_cursor - name;
1117 /* No stash in name, so see how we can default */
1121 if (len && isIDFIRST_lazy(name)) {
1122 bool global = FALSE;
1130 if ((name[0] == 'I' && name[1] == 'N' && name[2] == 'C')
1131 || (name[0] == 'E' && name[1] == 'N' && name[2] == 'V')
1132 || (name[0] == 'S' && name[1] == 'I' && name[2] == 'G'))
1136 if (name[0] == 'A' && name[1] == 'R' && name[2] == 'G'
1141 if (name[0] == 'S' && name[1] == 'T' && name[2] == 'D'
1142 && name[3] == 'I' && name[4] == 'N')
1146 if ((name[0] == 'S' && name[1] == 'T' && name[2] == 'D')
1147 &&((name[3] == 'O' && name[4] == 'U' && name[5] == 'T')
1148 ||(name[3] == 'E' && name[4] == 'R' && name[5] == 'R')))
1152 if (name[0] == 'A' && name[1] == 'R' && name[2] == 'G'
1153 && name[3] == 'V' && name[4] == 'O' && name[5] == 'U'
1160 stash = PL_defstash;
1161 else if (IN_PERL_COMPILETIME) {
1162 stash = PL_curstash;
1163 if (add && (PL_hints & HINT_STRICT_VARS) &&
1164 sv_type != SVt_PVCV &&
1165 sv_type != SVt_PVGV &&
1166 sv_type != SVt_PVFM &&
1167 sv_type != SVt_PVIO &&
1168 !(len == 1 && sv_type == SVt_PV &&
1169 (*name == 'a' || *name == 'b')) )
1171 gvp = (GV**)hv_fetch(stash,name,len,0);
1173 *gvp == (const GV *)&PL_sv_undef ||
1174 SvTYPE(*gvp) != SVt_PVGV)
1178 else if ((sv_type == SVt_PV && !GvIMPORTED_SV(*gvp)) ||
1179 (sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp)) ||
1180 (sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp)) )
1182 /* diag_listed_as: Variable "%s" is not imported%s */
1184 aTHX_ packWARN(WARN_MISC),
1185 "Variable \"%c%s\" is not imported",
1186 sv_type == SVt_PVAV ? '@' :
1187 sv_type == SVt_PVHV ? '%' : '$',
1191 aTHX_ packWARN(WARN_MISC),
1192 "\t(Did you mean &%s instead?)\n", name
1199 stash = CopSTASH(PL_curcop);
1202 stash = PL_defstash;
1205 /* By this point we should have a stash and a name */
1209 SV * const err = Perl_mess(aTHX_
1210 "Global symbol \"%s%s\" requires explicit package name",
1211 (sv_type == SVt_PV ? "$"
1212 : sv_type == SVt_PVAV ? "@"
1213 : sv_type == SVt_PVHV ? "%"
1216 if (USE_UTF8_IN_NAMES)
1219 gv = gv_fetchpvs("<none>::", GV_ADDMULTI, SVt_PVHV);
1221 /* symbol table under destruction */
1230 if (!SvREFCNT(stash)) /* symbol table under destruction */
1233 gvp = (GV**)hv_fetch(stash,name,len,add);
1234 if (!gvp || *gvp == (const GV *)&PL_sv_undef)
1237 if (SvTYPE(gv) == SVt_PVGV) {
1240 gv_init_sv(gv, sv_type);
1241 if (len == 1 && (sv_type == SVt_PVHV || sv_type == SVt_PVGV)) {
1243 require_tie_mod(gv, "!", newSVpvs("Errno"), "TIEHASH", 1);
1244 else if (*name == '-' || *name == '+')
1245 require_tie_mod(gv, name, newSVpvs("Tie::Hash::NamedCapture"), "TIEHASH", 0);
1247 else if (len == 3 && sv_type == SVt_PVAV
1248 && strnEQ(name, "ISA", 3)
1249 && (!GvAV(gv) || !SvSMAGICAL(GvAV(gv))))
1250 gv_magicalize_isa(gv);
1253 } else if (no_init) {
1255 } else if (no_expand && SvROK(gv)) {
1259 /* Adding a new symbol.
1260 Unless of course there was already something non-GV here, in which case
1261 we want to behave as if there was always a GV here, containing some sort
1263 Otherwise we run the risk of creating things like GvIO, which can cause
1264 subtle bugs. eg the one that tripped up SQL::Translator */
1266 faking_it = SvOK(gv);
1268 if (add & GV_ADDWARN)
1269 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL), "Had to create %s unexpectedly", nambeg);
1270 gv_init(gv, stash, name, len, add & GV_ADDMULTI);
1271 gv_init_sv(gv, faking_it ? SVt_PVCV : sv_type);
1273 if (isALPHA(name[0]) && ! (isLEXWARN_on ? ckWARN(WARN_ONCE)
1274 : (PL_dowarn & G_WARN_ON ) ) )
1277 /* set up magic where warranted */
1278 if (stash != PL_defstash) { /* not the main stash */
1279 /* We only have to check for four names here: EXPORT, ISA, OVERLOAD
1280 and VERSION. All the others apply only to the main stash. */
1282 const char * const name2 = name + 1;
1285 if (strnEQ(name2, "XPORT", 5))
1289 if (strEQ(name2, "SA"))
1290 gv_magicalize_isa(gv);
1293 if (strEQ(name2, "VERLOAD"))
1294 gv_magicalize_overload(gv);
1297 if (strEQ(name2, "ERSION"))
1307 /* Nothing else to do.
1308 The compiler will probably turn the switch statement into a
1309 branch table. Make sure we avoid even that small overhead for
1310 the common case of lower case variable names. */
1314 const char * const name2 = name + 1;
1317 if (strEQ(name2, "RGV")) {
1318 IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START;
1320 else if (strEQ(name2, "RGVOUT")) {
1325 if (strnEQ(name2, "XPORT", 5))
1329 if (strEQ(name2, "SA")) {
1330 gv_magicalize_isa(gv);
1334 if (strEQ(name2, "VERLOAD")) {
1335 gv_magicalize_overload(gv);
1339 if (strEQ(name2, "IG")) {
1342 if (!PL_psig_name) {
1343 Newxz(PL_psig_name, 2 * SIG_SIZE, SV*);
1344 Newxz(PL_psig_pend, SIG_SIZE, int);
1345 PL_psig_ptr = PL_psig_name + SIG_SIZE;
1347 /* I think that the only way to get here is to re-use an
1348 embedded perl interpreter, where the previous
1349 use didn't clean up fully because
1350 PL_perl_destruct_level was 0. I'm not sure that we
1351 "support" that, in that I suspect in that scenario
1352 there are sufficient other garbage values left in the
1353 interpreter structure that something else will crash
1354 before we get here. I suspect that this is one of
1355 those "doctor, it hurts when I do this" bugs. */
1356 Zero(PL_psig_name, 2 * SIG_SIZE, SV*);
1357 Zero(PL_psig_pend, SIG_SIZE, int);
1361 hv_magic(hv, NULL, PERL_MAGIC_sig);
1362 for (i = 1; i < SIG_SIZE; i++) {
1363 SV * const * const init = hv_fetch(hv, PL_sig_name[i], strlen(PL_sig_name[i]), 1);
1365 sv_setsv(*init, &PL_sv_undef);
1370 if (strEQ(name2, "ERSION"))
1373 case '\003': /* $^CHILD_ERROR_NATIVE */
1374 if (strEQ(name2, "HILD_ERROR_NATIVE"))
1377 case '\005': /* $^ENCODING */
1378 if (strEQ(name2, "NCODING"))
1381 case '\007': /* $^GLOBAL_PHASE */
1382 if (strEQ(name2, "LOBAL_PHASE"))
1385 case '\015': /* $^MATCH */
1386 if (strEQ(name2, "ATCH"))
1388 case '\017': /* $^OPEN */
1389 if (strEQ(name2, "PEN"))
1392 case '\020': /* $^PREMATCH $^POSTMATCH */
1393 if (strEQ(name2, "REMATCH") || strEQ(name2, "OSTMATCH"))
1396 case '\024': /* ${^TAINT} */
1397 if (strEQ(name2, "AINT"))
1400 case '\025': /* ${^UNICODE}, ${^UTF8LOCALE} */
1401 if (strEQ(name2, "NICODE"))
1403 if (strEQ(name2, "TF8LOCALE"))
1405 if (strEQ(name2, "TF8CACHE"))
1408 case '\027': /* $^WARNING_BITS */
1409 if (strEQ(name2, "ARNING_BITS"))
1422 /* Ensures that we have an all-digit variable, ${"1foo"} fails
1424 /* This snippet is taken from is_gv_magical */
1425 const char *end = name + len;
1426 while (--end > name) {
1427 if (!isDIGIT(*end)) return gv;
1434 /* Names of length 1. (Or 0. But name is NUL terminated, so that will
1435 be case '\0' in this switch statement (ie a default case) */
1441 sv_type == SVt_PVAV ||
1442 sv_type == SVt_PVHV ||
1443 sv_type == SVt_PVCV ||
1444 sv_type == SVt_PVFM ||
1447 PL_sawampersand = TRUE;
1451 sv_setpv(GvSVn(gv),PL_chopset);
1455 #ifdef COMPLEX_STATUS
1456 SvUPGRADE(GvSVn(gv), SVt_PVLV);
1462 /* If %! has been used, automatically load Errno.pm. */
1464 sv_magic(GvSVn(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, name, len);
1466 /* magicalization must be done before require_tie_mod is called */
1467 if (sv_type == SVt_PVHV || sv_type == SVt_PVGV)
1468 require_tie_mod(gv, "!", newSVpvs("Errno"), "TIEHASH", 1);
1473 GvMULTI_on(gv); /* no used once warnings here */
1475 AV* const av = GvAVn(gv);
1476 SV* const avc = (*name == '+') ? MUTABLE_SV(av) : NULL;
1478 sv_magic(MUTABLE_SV(av), avc, PERL_MAGIC_regdata, NULL, 0);
1479 sv_magic(GvSVn(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, name, len);
1481 SvREADONLY_on(GvSVn(gv));
1484 if (sv_type == SVt_PVHV || sv_type == SVt_PVGV)
1485 require_tie_mod(gv, name, newSVpvs("Tie::Hash::NamedCapture"), "TIEHASH", 0);
1491 if (sv_type == SVt_PV)
1492 Perl_ck_warner_d(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX),
1493 "$%c is no longer supported", *name);
1496 sv_setiv(GvSVn(gv), (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0);
1499 case '\010': /* $^H */
1501 HV *const hv = GvHVn(gv);
1502 hv_magic(hv, NULL, PERL_MAGIC_hints);
1505 case '\023': /* $^S */
1507 SvREADONLY_on(GvSVn(gv));
1531 case '\001': /* $^A */
1532 case '\003': /* $^C */
1533 case '\004': /* $^D */
1534 case '\005': /* $^E */
1535 case '\006': /* $^F */
1536 case '\011': /* $^I, NOT \t in EBCDIC */
1537 case '\016': /* $^N */
1538 case '\017': /* $^O */
1539 case '\020': /* $^P */
1540 case '\024': /* $^T */
1541 case '\027': /* $^W */
1543 sv_magic(GvSVn(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, name, len);
1546 case '\014': /* $^L */
1547 sv_setpvs(GvSVn(gv),"\f");
1548 PL_formfeed = GvSVn(gv);
1551 sv_setpvs(GvSVn(gv),"\034");
1555 SV * const sv = GvSVn(gv);
1556 if (!sv_derived_from(PL_patchlevel, "version"))
1557 upg_version(PL_patchlevel, TRUE);
1558 GvSV(gv) = vnumify(PL_patchlevel);
1559 SvREADONLY_on(GvSV(gv));
1563 case '\026': /* $^V */
1565 SV * const sv = GvSVn(gv);
1566 GvSV(gv) = new_version(PL_patchlevel);
1567 SvREADONLY_on(GvSV(gv));
1577 Perl_gv_fullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain)
1581 const HV * const hv = GvSTASH(gv);
1583 PERL_ARGS_ASSERT_GV_FULLNAME4;
1589 sv_setpv(sv, prefix ? prefix : "");
1591 name = HvNAME_get(hv);
1593 namelen = HvNAMELEN_get(hv);
1599 if (keepmain || strNE(name, "main")) {
1600 sv_catpvn(sv,name,namelen);
1603 sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv));
1607 Perl_gv_efullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain)
1609 const GV * const egv = GvEGVx(gv);
1611 PERL_ARGS_ASSERT_GV_EFULLNAME4;
1613 gv_fullname4(sv, egv ? egv : gv, prefix, keepmain);
1617 Perl_gv_check(pTHX_ const HV *stash)
1622 PERL_ARGS_ASSERT_GV_CHECK;
1624 if (!HvARRAY(stash))
1626 for (i = 0; i <= (I32) HvMAX(stash); i++) {
1628 for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) {
1631 if (HeKEY(entry)[HeKLEN(entry)-1] == ':' &&
1632 (gv = MUTABLE_GV(HeVAL(entry))) && isGV(gv) && (hv = GvHV(gv)))
1634 if (hv != PL_defstash && hv != stash)
1635 gv_check(hv); /* nested package */
1637 else if (isALPHA(*HeKEY(entry))) {
1639 gv = MUTABLE_GV(HeVAL(entry));
1640 if (SvTYPE(gv) != SVt_PVGV || GvMULTI(gv))
1643 CopLINE_set(PL_curcop, GvLINE(gv));
1645 CopFILE(PL_curcop) = (char *)file; /* set for warning */
1647 CopFILEGV(PL_curcop)
1648 = gv_fetchfile_flags(file, HEK_LEN(GvFILE_HEK(gv)), 0);
1650 Perl_warner(aTHX_ packWARN(WARN_ONCE),
1651 "Name \"%s::%s\" used only once: possible typo",
1652 HvNAME_get(stash), GvNAME(gv));
1659 Perl_newGVgen(pTHX_ const char *pack)
1663 PERL_ARGS_ASSERT_NEWGVGEN;
1665 return gv_fetchpv(Perl_form(aTHX_ "%s::_GEN_%ld", pack, (long)PL_gensym++),
1669 /* hopefully this is only called on local symbol table entries */
1672 Perl_gp_ref(pTHX_ GP *gp)
1680 /* If the GP they asked for a reference to contains
1681 a method cache entry, clear it first, so that we
1682 don't infect them with our cached entry */
1683 SvREFCNT_dec(gp->gp_cv);
1692 Perl_gp_free(pTHX_ GV *gv)
1697 if (!gv || !isGV_with_GP(gv) || !(gp = GvGP(gv)))
1699 if (gp->gp_refcnt == 0) {
1700 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
1701 "Attempt to free unreferenced glob pointers"
1702 pTHX__FORMAT pTHX__VALUE);
1705 if (--gp->gp_refcnt > 0) {
1706 if (gp->gp_egv == gv)
1712 if (gp->gp_file_hek)
1713 unshare_hek(gp->gp_file_hek);
1714 SvREFCNT_dec(gp->gp_sv);
1715 SvREFCNT_dec(gp->gp_av);
1716 /* FIXME - another reference loop GV -> symtab -> GV ?
1717 Somehow gp->gp_hv can end up pointing at freed garbage. */
1718 if (gp->gp_hv && SvTYPE(gp->gp_hv) == SVt_PVHV) {
1719 const char *hvname = HvNAME_get(gp->gp_hv);
1720 if (PL_stashcache && hvname)
1721 (void)hv_delete(PL_stashcache, hvname, HvNAMELEN_get(gp->gp_hv),
1723 SvREFCNT_dec(gp->gp_hv);
1725 SvREFCNT_dec(gp->gp_io);
1726 SvREFCNT_dec(gp->gp_cv);
1727 SvREFCNT_dec(gp->gp_form);
1734 Perl_magic_freeovrld(pTHX_ SV *sv, MAGIC *mg)
1736 AMT * const amtp = (AMT*)mg->mg_ptr;
1737 PERL_UNUSED_ARG(sv);
1739 PERL_ARGS_ASSERT_MAGIC_FREEOVRLD;
1741 if (amtp && AMT_AMAGIC(amtp)) {
1743 for (i = 1; i < NofAMmeth; i++) {
1744 CV * const cv = amtp->table[i];
1746 SvREFCNT_dec(MUTABLE_SV(cv));
1747 amtp->table[i] = NULL;
1754 /* Updates and caches the CV's */
1756 * 1 on success and there is some overload
1757 * 0 if there is no overload
1758 * -1 if some error occurred and it couldn't croak
1762 Perl_Gv_AMupdate(pTHX_ HV *stash, bool destructing)
1765 MAGIC* const mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table);
1767 const struct mro_meta* stash_meta = HvMROMETA(stash);
1770 PERL_ARGS_ASSERT_GV_AMUPDATE;
1772 newgen = PL_sub_generation + stash_meta->pkg_gen + stash_meta->cache_gen;
1774 const AMT * const amtp = (AMT*)mg->mg_ptr;
1775 if (amtp->was_ok_am == PL_amagic_generation
1776 && amtp->was_ok_sub == newgen) {
1777 return AMT_OVERLOADED(amtp) ? 1 : 0;
1779 sv_unmagic(MUTABLE_SV(stash), PERL_MAGIC_overload_table);
1782 DEBUG_o( Perl_deb(aTHX_ "Recalcing overload magic in package %s\n",HvNAME_get(stash)) );
1785 amt.was_ok_am = PL_amagic_generation;
1786 amt.was_ok_sub = newgen;
1787 amt.fallback = AMGfallNO;
1791 int filled = 0, have_ovl = 0;
1794 /* Work with "fallback" key, which we assume to be first in PL_AMG_names */
1796 /* Try to find via inheritance. */
1797 GV *gv = gv_fetchmeth(stash, PL_AMG_names[0], 2, -1);
1798 SV * const sv = gv ? GvSV(gv) : NULL;
1802 lim = DESTROY_amg; /* Skip overloading entries. */
1803 #ifdef PERL_DONT_CREATE_GVSV
1805 NOOP; /* Equivalent to !SvTRUE and !SvOK */
1808 else if (SvTRUE(sv))
1809 amt.fallback=AMGfallYES;
1811 amt.fallback=AMGfallNEVER;
1813 for (i = 1; i < lim; i++)
1814 amt.table[i] = NULL;
1815 for (; i < NofAMmeth; i++) {
1816 const char * const cooky = PL_AMG_names[i];
1817 /* Human-readable form, for debugging: */
1818 const char * const cp = (i >= DESTROY_amg ? cooky : AMG_id2name(i));
1819 const STRLEN l = PL_AMG_namelens[i];
1821 DEBUG_o( Perl_deb(aTHX_ "Checking overloading of \"%s\" in package \"%.256s\"\n",
1822 cp, HvNAME_get(stash)) );
1823 /* don't fill the cache while looking up!
1824 Creation of inheritance stubs in intermediate packages may
1825 conflict with the logic of runtime method substitution.
1826 Indeed, for inheritance A -> B -> C, if C overloads "+0",
1827 then we could have created stubs for "(+0" in A and C too.
1828 But if B overloads "bool", we may want to use it for
1829 numifying instead of C's "+0". */
1830 if (i >= DESTROY_amg)
1831 gv = Perl_gv_fetchmeth_autoload(aTHX_ stash, cooky, l, 0);
1832 else /* Autoload taken care of below */
1833 gv = Perl_gv_fetchmeth(aTHX_ stash, cooky, l, -1);
1835 if (gv && (cv = GvCV(gv))) {
1837 if (GvNAMELEN(CvGV(cv)) == 3 && strEQ(GvNAME(CvGV(cv)), "nil")
1838 && strEQ(hvname = HvNAME_get(GvSTASH(CvGV(cv))), "overload")) {
1839 /* This is a hack to support autoloading..., while
1840 knowing *which* methods were declared as overloaded. */
1841 /* GvSV contains the name of the method. */
1843 SV *gvsv = GvSV(gv);
1845 DEBUG_o( Perl_deb(aTHX_ "Resolving method \"%"SVf256\
1846 "\" for overloaded \"%s\" in package \"%.256s\"\n",
1847 (void*)GvSV(gv), cp, hvname) );
1848 if (!gvsv || !SvPOK(gvsv)
1849 || !(ngv = gv_fetchmethod_autoload(stash, SvPVX_const(gvsv),
1852 /* Can be an import stub (created by "can"). */
1857 const char * const name = (gvsv && SvPOK(gvsv)) ? SvPVX_const(gvsv) : "???";
1858 Perl_croak(aTHX_ "%s method \"%.256s\" overloading \"%s\" "\
1859 "in package \"%.256s\"",
1860 (GvCVGEN(gv) ? "Stub found while resolving"
1865 cv = GvCV(gv = ngv);
1867 DEBUG_o( Perl_deb(aTHX_ "Overloading \"%s\" in package \"%.256s\" via \"%.256s::%.256s\"\n",
1868 cp, HvNAME_get(stash), HvNAME_get(GvSTASH(CvGV(cv))),
1869 GvNAME(CvGV(cv))) );
1871 if (i < DESTROY_amg)
1873 } else if (gv) { /* Autoloaded... */
1874 cv = MUTABLE_CV(gv);
1877 amt.table[i]=MUTABLE_CV(SvREFCNT_inc_simple(cv));
1880 AMT_AMAGIC_on(&amt);
1882 AMT_OVERLOADED_on(&amt);
1883 sv_magic(MUTABLE_SV(stash), 0, PERL_MAGIC_overload_table,
1884 (char*)&amt, sizeof(AMT));
1888 /* Here we have no table: */
1890 AMT_AMAGIC_off(&amt);
1891 sv_magic(MUTABLE_SV(stash), 0, PERL_MAGIC_overload_table,
1892 (char*)&amt, sizeof(AMTS));
1898 Perl_gv_handler(pTHX_ HV *stash, I32 id)
1904 struct mro_meta* stash_meta;
1906 if (!stash || !HvNAME_get(stash))
1909 stash_meta = HvMROMETA(stash);
1910 newgen = PL_sub_generation + stash_meta->pkg_gen + stash_meta->cache_gen;
1912 mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table);
1915 /* If we're looking up a destructor to invoke, we must avoid
1916 * that Gv_AMupdate croaks, because we might be dying already */
1917 if (Gv_AMupdate(stash, cBOOL(id == DESTROY_amg)) == -1) {
1918 /* and if it didn't found a destructor, we fall back
1919 * to a simpler method that will only look for the
1920 * destructor instead of the whole magic */
1921 if (id == DESTROY_amg) {
1922 GV * const gv = gv_fetchmethod(stash, "DESTROY");
1928 mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table);
1931 amtp = (AMT*)mg->mg_ptr;
1932 if ( amtp->was_ok_am != PL_amagic_generation
1933 || amtp->was_ok_sub != newgen )
1935 if (AMT_AMAGIC(amtp)) {
1936 CV * const ret = amtp->table[id];
1937 if (ret && isGV(ret)) { /* Autoloading stab */
1938 /* Passing it through may have resulted in a warning
1939 "Inherited AUTOLOAD for a non-method deprecated", since
1940 our caller is going through a function call, not a method call.
1941 So return the CV for AUTOLOAD, setting $AUTOLOAD. */
1942 GV * const gv = gv_fetchmethod(stash, PL_AMG_names[id]);
1954 /* Implement tryAMAGICun_MG macro.
1955 Do get magic, then see if the stack arg is overloaded and if so call it.
1957 AMGf_set return the arg using SETs rather than assigning to
1959 AMGf_numeric apply sv_2num to the stack arg.
1963 Perl_try_amagic_un(pTHX_ int method, int flags) {
1967 SV* const arg = TOPs;
1971 if (SvAMAGIC(arg) && (tmpsv = amagic_call(arg, &PL_sv_undef, method,
1972 AMGf_noright | AMGf_unary))) {
1973 if (flags & AMGf_set) {
1978 if (SvPADMY(TARG)) {
1979 sv_setsv(TARG, tmpsv);
1989 if ((flags & AMGf_numeric) && SvROK(arg))
1995 /* Implement tryAMAGICbin_MG macro.
1996 Do get magic, then see if the two stack args are overloaded and if so
1999 AMGf_set return the arg using SETs rather than assigning to
2001 AMGf_assign op may be called as mutator (eg +=)
2002 AMGf_numeric apply sv_2num to the stack arg.
2006 Perl_try_amagic_bin(pTHX_ int method, int flags) {
2009 SV* const left = TOPm1s;
2010 SV* const right = TOPs;
2016 if (SvAMAGIC(left) || SvAMAGIC(right)) {
2017 SV * const tmpsv = amagic_call(left, right, method,
2018 ((flags & AMGf_assign) && opASSIGN ? AMGf_assign: 0));
2020 if (flags & AMGf_set) {
2027 if (opASSIGN || SvPADMY(TARG)) {
2028 sv_setsv(TARG, tmpsv);
2038 if (flags & AMGf_numeric) {
2040 *(sp-1) = sv_2num(left);
2042 *sp = sv_2num(right);
2048 Perl_amagic_deref_call(pTHX_ SV *ref, int method) {
2051 PERL_ARGS_ASSERT_AMAGIC_DEREF_CALL;
2053 while (SvAMAGIC(ref) &&
2054 (tmpsv = amagic_call(ref, &PL_sv_undef, method,
2055 AMGf_noright | AMGf_unary))) {
2057 Perl_croak(aTHX_ "Overloaded dereference did not return a reference");
2058 if (tmpsv == ref || SvRV(tmpsv) == SvRV(ref)) {
2059 /* Bail out if it returns us the same reference. */
2064 return tmpsv ? tmpsv : ref;
2068 Perl_amagic_call(pTHX_ SV *left, SV *right, int method, int flags)
2073 CV **cvp=NULL, **ocvp=NULL;
2074 AMT *amtp=NULL, *oamtp=NULL;
2075 int off = 0, off1, lr = 0, notfound = 0;
2076 int postpr = 0, force_cpy = 0;
2077 int assign = AMGf_assign & flags;
2078 const int assignshift = assign ? 1 : 0;
2079 int use_default_op = 0;
2085 PERL_ARGS_ASSERT_AMAGIC_CALL;
2087 if ( PL_curcop->cop_hints & HINT_NO_AMAGIC ) {
2088 SV *lex_mask = cop_hints_fetch_pvs(PL_curcop, "overloading", 0);
2090 if ( !lex_mask || !SvOK(lex_mask) )
2091 /* overloading lexically disabled */
2093 else if ( lex_mask && SvPOK(lex_mask) ) {
2094 /* we have an entry in the hints hash, check if method has been
2095 * masked by overloading.pm */
2097 const int offset = method / 8;
2098 const int bit = method % 8;
2099 char *pv = SvPV(lex_mask, len);
2101 /* Bit set, so this overloading operator is disabled */
2102 if ( (STRLEN)offset < len && pv[offset] & ( 1 << bit ) )
2107 if (!(AMGf_noleft & flags) && SvAMAGIC(left)
2108 && (stash = SvSTASH(SvRV(left)))
2109 && (mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table))
2110 && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr)
2111 ? (oamtp = amtp = (AMT*)mg->mg_ptr)->table
2113 && ((cv = cvp[off=method+assignshift])
2114 || (assign && amtp->fallback > AMGfallNEVER && /* fallback to
2120 cv = cvp[off=method])))) {
2121 lr = -1; /* Call method for left argument */
2123 if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) {
2126 /* look for substituted methods */
2127 /* In all the covered cases we should be called with assign==0. */
2131 if ((cv = cvp[off=add_ass_amg])
2132 || ((cv = cvp[off = add_amg]) && (force_cpy = 0, postpr = 1))) {
2133 right = &PL_sv_yes; lr = -1; assign = 1;
2138 if ((cv = cvp[off = subtr_ass_amg])
2139 || ((cv = cvp[off = subtr_amg]) && (force_cpy = 0, postpr=1))) {
2140 right = &PL_sv_yes; lr = -1; assign = 1;
2144 (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg]));
2147 (void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg]));
2150 (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg]));
2153 (void)((cv = cvp[off=bool__amg])
2154 || (cv = cvp[off=numer_amg])
2155 || (cv = cvp[off=string_amg]));
2162 * SV* ref causes confusion with the interpreter variable of
2165 SV* const tmpRef=SvRV(left);
2166 if (!SvROK(tmpRef) && SvTYPE(tmpRef) <= SVt_PVMG) {
2168 * Just to be extra cautious. Maybe in some
2169 * additional cases sv_setsv is safe, too.
2171 SV* const newref = newSVsv(tmpRef);
2172 SvOBJECT_on(newref);
2173 /* As a bit of a source compatibility hack, SvAMAGIC() and
2174 friends dereference an RV, to behave the same was as when
2175 overloading was stored on the reference, not the referant.
2176 Hence we can't use SvAMAGIC_on()
2178 SvFLAGS(newref) |= SVf_AMAGIC;
2179 SvSTASH_set(newref, MUTABLE_HV(SvREFCNT_inc(SvSTASH(tmpRef))));
2185 if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg])
2186 && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) {
2187 SV* const nullsv=sv_2mortal(newSViv(0));
2189 SV* const lessp = amagic_call(left,nullsv,
2190 lt_amg,AMGf_noright);
2191 logic = SvTRUE(lessp);
2193 SV* const lessp = amagic_call(left,nullsv,
2194 ncmp_amg,AMGf_noright);
2195 logic = (SvNV(lessp) < 0);
2198 if (off==subtr_amg) {
2209 if ((cv = cvp[off=subtr_amg])) {
2211 left = sv_2mortal(newSViv(0));
2216 case iter_amg: /* XXXX Eventually should do to_gv. */
2217 case ftest_amg: /* XXXX Eventually should do to_gv. */
2220 return NULL; /* Delegate operation to standard mechanisms. */
2228 return left; /* Delegate operation to standard mechanisms. */
2233 if (!cv) goto not_found;
2234 } else if (!(AMGf_noright & flags) && SvAMAGIC(right)
2235 && (stash = SvSTASH(SvRV(right)))
2236 && (mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table))
2237 && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr)
2238 ? (amtp = (AMT*)mg->mg_ptr)->table
2240 && (cv = cvp[off=method])) { /* Method for right
2243 } else if (((cvp && amtp->fallback > AMGfallNEVER)
2244 || (ocvp && oamtp->fallback > AMGfallNEVER))
2245 && !(flags & AMGf_unary)) {
2246 /* We look for substitution for
2247 * comparison operations and
2249 if (method==concat_amg || method==concat_ass_amg
2250 || method==repeat_amg || method==repeat_ass_amg) {
2251 return NULL; /* Delegate operation to string conversion */
2273 if (ocvp && (oamtp->fallback > AMGfallNEVER)) {
2277 if (!cv && (cvp && amtp->fallback > AMGfallNEVER)) {
2287 not_found: /* No method found, either report or croak */
2295 return left; /* Delegate operation to standard mechanisms. */
2298 if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */
2299 notfound = 1; lr = -1;
2300 } else if (cvp && (cv=cvp[nomethod_amg])) {
2301 notfound = 1; lr = 1;
2302 } else if ((use_default_op =
2303 (!ocvp || oamtp->fallback >= AMGfallYES)
2304 && (!cvp || amtp->fallback >= AMGfallYES))
2306 /* Skip generating the "no method found" message. */
2310 if (off==-1) off=method;
2311 msg = sv_2mortal(Perl_newSVpvf(aTHX_
2312 "Operation \"%s\": no method found,%sargument %s%s%s%s",
2313 AMG_id2name(method + assignshift),
2314 (flags & AMGf_unary ? " " : "\n\tleft "),
2316 "in overloaded package ":
2317 "has no overloaded magic",
2319 HvNAME_get(SvSTASH(SvRV(left))):
2322 ",\n\tright argument in overloaded package ":
2325 : ",\n\tright argument has no overloaded magic"),
2327 HvNAME_get(SvSTASH(SvRV(right))):
2329 if (use_default_op) {
2330 DEBUG_o( Perl_deb(aTHX_ "%s", SvPVX_const(msg)) );
2332 Perl_croak(aTHX_ "%"SVf, SVfARG(msg));
2336 force_cpy = force_cpy || assign;
2341 DEBUG_o(Perl_deb(aTHX_
2342 "Overloaded operator \"%s\"%s%s%s:\n\tmethod%s found%s in package %s%s\n",
2344 method+assignshift==off? "" :
2346 method+assignshift==off? "" :
2347 AMG_id2name(method+assignshift),
2348 method+assignshift==off? "" : "\")",
2349 flags & AMGf_unary? "" :
2350 lr==1 ? " for right argument": " for left argument",
2351 flags & AMGf_unary? " for argument" : "",
2352 stash ? HvNAME_get(stash) : "null",
2353 fl? ",\n\tassignment variant used": "") );
2356 /* Since we use shallow copy during assignment, we need
2357 * to dublicate the contents, probably calling user-supplied
2358 * version of copy operator
2360 /* We need to copy in following cases:
2361 * a) Assignment form was called.
2362 * assignshift==1, assign==T, method + 1 == off
2363 * b) Increment or decrement, called directly.
2364 * assignshift==0, assign==0, method + 0 == off
2365 * c) Increment or decrement, translated to assignment add/subtr.
2366 * assignshift==0, assign==T,
2368 * d) Increment or decrement, translated to nomethod.
2369 * assignshift==0, assign==0,
2371 * e) Assignment form translated to nomethod.
2372 * assignshift==1, assign==T, method + 1 != off
2375 /* off is method, method+assignshift, or a result of opcode substitution.
2376 * In the latter case assignshift==0, so only notfound case is important.
2378 if (( (method + assignshift == off)
2379 && (assign || (method == inc_amg) || (method == dec_amg)))
2382 /* newSVsv does not behave as advertised, so we copy missing
2383 * information by hand */
2384 SV *tmpRef = SvRV(left);
2386 if (SvREFCNT(tmpRef) > 1 && (rv_copy = AMG_CALLunary(left,copy_amg))) {
2387 SvRV_set(left, rv_copy);
2389 SvREFCNT_dec(tmpRef);
2397 const bool oldcatch = CATCH_GET;
2400 Zero(&myop, 1, BINOP);
2401 myop.op_last = (OP *) &myop;
2402 myop.op_next = NULL;
2403 myop.op_flags = OPf_WANT_SCALAR | OPf_STACKED;
2405 PUSHSTACKi(PERLSI_OVERLOAD);
2408 PL_op = (OP *) &myop;
2409 if (PERLDB_SUB && PL_curstash != PL_debstash)
2410 PL_op->op_private |= OPpENTERSUB_DB;
2414 EXTEND(SP, notfound + 5);
2415 PUSHs(lr>0? right: left);
2416 PUSHs(lr>0? left: right);
2417 PUSHs( lr > 0 ? &PL_sv_yes : ( assign ? &PL_sv_undef : &PL_sv_no ));
2419 PUSHs(newSVpvn_flags(AMG_id2name(method + assignshift),
2420 AMG_id2namelen(method + assignshift), SVs_TEMP));
2422 PUSHs(MUTABLE_SV(cv));
2425 if ((PL_op = PL_ppaddr[OP_ENTERSUB](aTHX)))
2433 CATCH_SET(oldcatch);
2440 ans=SvIV(res)<=0; break;
2443 ans=SvIV(res)<0; break;
2446 ans=SvIV(res)>=0; break;
2449 ans=SvIV(res)>0; break;
2452 ans=SvIV(res)==0; break;
2455 ans=SvIV(res)!=0; break;
2458 SvSetSV(left,res); return left;
2460 ans=!SvTRUE(res); break;
2465 } else if (method==copy_amg) {
2467 Perl_croak(aTHX_ "Copy method did not return a reference");
2469 return SvREFCNT_inc(SvRV(res));
2477 =for apidoc is_gv_magical_sv
2479 Returns C<TRUE> if given the name of a magical GV.
2481 Currently only useful internally when determining if a GV should be
2482 created even in rvalue contexts.
2484 C<flags> is not used at present but available for future extension to
2485 allow selecting particular classes of magical variable.
2487 Currently assumes that C<name> is NUL terminated (as well as len being valid).
2488 This assumption is met by all callers within the perl core, which all pass
2489 pointers returned by SvPV.
2495 Perl_is_gv_magical_sv(pTHX_ SV *const name_sv, U32 flags)
2498 const char *const name = SvPV_const(name_sv, len);
2500 PERL_UNUSED_ARG(flags);
2501 PERL_ARGS_ASSERT_IS_GV_MAGICAL_SV;
2504 const char * const name1 = name + 1;
2507 if (len == 3 && name[1] == 'S' && name[2] == 'A')
2511 if (len == 8 && strEQ(name1, "VERLOAD"))
2515 if (len == 3 && name[1] == 'I' && name[2] == 'G')
2518 /* Using ${^...} variables is likely to be sufficiently rare that
2519 it seems sensible to avoid the space hit of also checking the
2521 case '\017': /* ${^OPEN} */
2522 if (strEQ(name1, "PEN"))
2525 case '\024': /* ${^TAINT} */
2526 if (strEQ(name1, "AINT"))
2529 case '\025': /* ${^UNICODE} */
2530 if (strEQ(name1, "NICODE"))
2532 if (strEQ(name1, "TF8LOCALE"))
2535 case '\027': /* ${^WARNING_BITS} */
2536 if (strEQ(name1, "ARNING_BITS"))
2549 const char *end = name + len;
2550 while (--end > name) {
2558 /* Because we're already assuming that name is NUL terminated
2559 below, we can treat an empty name as "\0" */
2585 case '\001': /* $^A */
2586 case '\003': /* $^C */
2587 case '\004': /* $^D */
2588 case '\005': /* $^E */
2589 case '\006': /* $^F */
2590 case '\010': /* $^H */
2591 case '\011': /* $^I, NOT \t in EBCDIC */
2592 case '\014': /* $^L */
2593 case '\016': /* $^N */
2594 case '\017': /* $^O */
2595 case '\020': /* $^P */
2596 case '\023': /* $^S */
2597 case '\024': /* $^T */
2598 case '\026': /* $^V */
2599 case '\027': /* $^W */
2619 Perl_gv_name_set(pTHX_ GV *gv, const char *name, U32 len, U32 flags)
2624 PERL_ARGS_ASSERT_GV_NAME_SET;
2625 PERL_UNUSED_ARG(flags);
2628 Perl_croak(aTHX_ "panic: gv name too long (%"UVuf")", (UV) len);
2630 if (!(flags & GV_ADD) && GvNAME_HEK(gv)) {
2631 unshare_hek(GvNAME_HEK(gv));
2634 PERL_HASH(hash, name, len);
2635 GvNAME_HEK(gv) = share_hek(name, len, hash);
2639 =for apidoc gv_try_downgrade
2641 If the typeglob C<gv> can be expressed more succinctly, by having
2642 something other than a real GV in its place in the stash, replace it
2643 with the optimised form. Basic requirements for this are that C<gv>
2644 is a real typeglob, is sufficiently ordinary, and is only referenced
2645 from its package. This function is meant to be used when a GV has been
2646 looked up in part to see what was there, causing upgrading, but based
2647 on what was found it turns out that the real GV isn't required after all.
2649 If C<gv> is a completely empty typeglob, it is deleted from the stash.
2651 If C<gv> is a typeglob containing only a sufficiently-ordinary constant
2652 sub, the typeglob is replaced with a scalar-reference placeholder that
2653 more compactly represents the same thing.
2659 Perl_gv_try_downgrade(pTHX_ GV *gv)
2665 PERL_ARGS_ASSERT_GV_TRY_DOWNGRADE;
2667 /* XXX Why and where does this leave dangling pointers during global
2669 if (PL_phase == PERL_PHASE_DESTRUCT) return;
2671 if (!(SvREFCNT(gv) == 1 && SvTYPE(gv) == SVt_PVGV && !SvFAKE(gv) &&
2672 !SvOBJECT(gv) && !SvREADONLY(gv) &&
2673 isGV_with_GP(gv) && GvGP(gv) &&
2674 !GvINTRO(gv) && GvREFCNT(gv) == 1 &&
2675 !GvSV(gv) && !GvAV(gv) && !GvHV(gv) && !GvIOp(gv) && !GvFORM(gv) &&
2676 GvEGVx(gv) == gv && (stash = GvSTASH(gv))))
2678 if (SvMAGICAL(gv)) {
2680 /* only backref magic is allowed */
2681 if (SvGMAGICAL(gv) || SvSMAGICAL(gv))
2683 for (mg = SvMAGIC(gv); mg; mg = mg->mg_moremagic) {
2684 if (mg->mg_type != PERL_MAGIC_backref)
2690 HEK *gvnhek = GvNAME_HEK(gv);
2691 (void)hv_delete(stash, HEK_KEY(gvnhek),
2692 HEK_UTF8(gvnhek) ? -HEK_LEN(gvnhek) : HEK_LEN(gvnhek), G_DISCARD);
2693 } else if (GvMULTI(gv) && cv &&
2694 !SvOBJECT(cv) && !SvMAGICAL(cv) && !SvREADONLY(cv) &&
2695 CvSTASH(cv) == stash && CvGV(cv) == gv &&
2696 CvCONST(cv) && !CvMETHOD(cv) && !CvLVALUE(cv) && !CvUNIQUE(cv) &&
2697 !CvNODEBUG(cv) && !CvCLONE(cv) && !CvCLONED(cv) && !CvANON(cv) &&
2698 (namehek = GvNAME_HEK(gv)) &&
2699 (gvp = hv_fetch(stash, HEK_KEY(namehek),
2700 HEK_LEN(namehek)*(HEK_UTF8(namehek) ? -1 : 1), 0)) &&
2702 SV *value = SvREFCNT_inc(CvXSUBANY(cv).any_ptr);
2706 SvFLAGS(gv) = SVt_IV|SVf_ROK;
2707 SvANY(gv) = (XPVGV*)((char*)&(gv->sv_u.svu_iv) -
2708 STRUCT_OFFSET(XPVIV, xiv_iv));
2709 SvRV_set(gv, value);
2715 * c-indentation-style: bsd
2717 * indent-tabs-mode: t
2720 * ex: set ts=8 sts=4 sw=4 noet: