3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 * 2000, 2001, 2002, 2003, 2004, 2005, 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 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,'
23 A GV is a structure which corresponds to to a Perl typeglob, ie *foo.
24 It is a structure that holds a pointer to a scalar, an array, a hash etc,
25 corresponding to $foo, @foo, %foo.
27 GVs are usually found as values in stashes (symbol table hashes) where
28 Perl stores its global variables.
37 static const char S_autoload[] = "AUTOLOAD";
38 static const STRLEN S_autolen = sizeof(S_autoload)-1;
41 #ifdef PERL_DONT_CREATE_GVSV
43 Perl_gv_SVadd(pTHX_ GV *gv)
45 if (!gv || SvTYPE((SV*)gv) != SVt_PVGV)
46 Perl_croak(aTHX_ "Bad symbol for scalar");
48 GvSV(gv) = NEWSV(72,0);
54 Perl_gv_AVadd(pTHX_ register GV *gv)
56 if (!gv || SvTYPE((SV*)gv) != SVt_PVGV)
57 Perl_croak(aTHX_ "Bad symbol for array");
64 Perl_gv_HVadd(pTHX_ register GV *gv)
66 if (!gv || SvTYPE((SV*)gv) != SVt_PVGV)
67 Perl_croak(aTHX_ "Bad symbol for hash");
74 Perl_gv_IOadd(pTHX_ register GV *gv)
76 if (!gv || SvTYPE((SV*)gv) != SVt_PVGV)
77 Perl_croak(aTHX_ "Bad symbol for filehandle");
79 #ifdef GV_UNIQUE_CHECK
81 Perl_croak(aTHX_ "Bad symbol for filehandle (GV is unique)");
90 Perl_gv_fetchfile(pTHX_ const char *name)
100 tmplen = strlen(name) + 2;
101 if (tmplen < sizeof smallbuf)
104 Newx(tmpbuf, tmplen + 1, char);
105 /* This is where the debugger's %{"::_<$filename"} hash is created */
108 memcpy(tmpbuf + 2, name, tmplen - 1);
109 gv = *(GV**)hv_fetch(PL_defstash, tmpbuf, tmplen, TRUE);
111 gv_init(gv, PL_defstash, tmpbuf, tmplen, FALSE);
112 #ifdef PERL_DONT_CREATE_GVSV
113 GvSV(gv) = newSVpvn(name, tmplen - 2);
115 sv_setpvn(GvSV(gv), name, tmplen - 2);
118 hv_magic(GvHVn(gv_AVadd(gv)), Nullgv, PERL_MAGIC_dbfile);
120 if (tmpbuf != smallbuf)
126 Perl_gv_init(pTHX_ GV *gv, HV *stash, const char *name, STRLEN len, int multi)
130 const bool doproto = SvTYPE(gv) > SVt_NULL;
131 const char * const proto = (doproto && SvPOK(gv)) ? SvPVX_const(gv) : NULL;
132 SV *const has_constant = doproto && SvROK(gv) ? SvRV(gv) : NULL;
134 assert (!(proto && has_constant));
141 sv_upgrade((SV*)gv, SVt_PVGV);
148 Safefree(SvPVX_mutable(gv));
151 GvGP(gv) = gp_ref(gp);
152 #ifdef PERL_DONT_CREATE_GVSV
155 GvSV(gv) = NEWSV(72,0);
157 GvLINE(gv) = CopLINE(PL_curcop);
158 /* XXX Ideally this cast would be replaced with a change to const char*
160 GvFILE(gv) = CopFILE(PL_curcop) ? CopFILE(PL_curcop) : (char *) "";
163 sv_magic((SV*)gv, (SV*)gv, PERL_MAGIC_glob, Nullch, 0);
166 Perl_sv_add_backref(aTHX_ (SV*)stash, (SV*)gv);
167 GvNAME(gv) = savepvn(name, len);
169 if (multi || doproto) /* doproto means it _was_ mentioned */
171 if (doproto) { /* Replicate part of newSUB here. */
175 /* newCONSTSUB takes ownership of the reference from us. */
176 GvCV(gv) = newCONSTSUB(stash, name, has_constant);
178 /* XXX unsafe for threads if eval_owner isn't held */
179 (void) start_subparse(0,0); /* Create empty CV in compcv. */
180 GvCV(gv) = PL_compcv;
186 CvFILE_set_from_cop(GvCV(gv), PL_curcop);
187 CvSTASH(GvCV(gv)) = PL_curstash;
189 sv_setpv((SV*)GvCV(gv), proto);
196 S_gv_init_sv(pTHX_ GV *gv, I32 sv_type)
208 #ifdef PERL_DONT_CREATE_GVSV
220 =for apidoc gv_fetchmeth
222 Returns the glob with the given C<name> and a defined subroutine or
223 C<NULL>. The glob lives in the given C<stash>, or in the stashes
224 accessible via @ISA and UNIVERSAL::.
226 The argument C<level> should be either 0 or -1. If C<level==0>, as a
227 side-effect creates a glob with the given C<name> in the given C<stash>
228 which in the case of success contains an alias for the subroutine, and sets
229 up caching info for this glob. Similarly for all the searched stashes.
231 This function grants C<"SUPER"> token as a postfix of the stash name. The
232 GV returned from C<gv_fetchmeth> may be a method cache entry, which is not
233 visible to Perl code. So when calling C<call_sv>, you should not use
234 the GV directly; instead, you should use the method's CV, which can be
235 obtained from the GV with the C<GvCV> macro.
241 Perl_gv_fetchmeth(pTHX_ HV *stash, const char *name, STRLEN len, I32 level)
250 /* UNIVERSAL methods should be callable without a stash */
252 level = -1; /* probably appropriate */
253 if(!(stash = gv_stashpvn("UNIVERSAL", 9, FALSE)))
257 hvname = HvNAME_get(stash);
260 "Can't use anonymous symbol table for method lookup");
262 if ((level > 100) || (level < -100))
263 Perl_croak(aTHX_ "Recursive inheritance detected while looking for method '%s' in package '%s'",
266 DEBUG_o( Perl_deb(aTHX_ "Looking for method %s in package %s\n",name,hvname) );
268 gvp = (GV**)hv_fetch(stash, name, len, (level >= 0));
273 if (SvTYPE(topgv) != SVt_PVGV)
274 gv_init(topgv, stash, name, len, TRUE);
275 if ((cv = GvCV(topgv))) {
276 /* If genuine method or valid cache entry, use it */
277 if (!GvCVGEN(topgv) || GvCVGEN(topgv) == PL_sub_generation)
279 /* Stale cached entry: junk it */
281 GvCV(topgv) = cv = Nullcv;
284 else if (GvCVGEN(topgv) == PL_sub_generation)
285 return 0; /* cache indicates sub doesn't exist */
288 gvp = (GV**)hv_fetch(stash, "ISA", 3, FALSE);
289 av = (gvp && (gv = *gvp) && gv != (GV*)&PL_sv_undef) ? GvAV(gv) : NULL;
291 /* create and re-create @.*::SUPER::ISA on demand */
292 if (!av || !SvMAGIC(av)) {
293 STRLEN packlen = HvNAMELEN_get(stash);
295 if (packlen >= 7 && strEQ(hvname + packlen - 7, "::SUPER")) {
299 basestash = gv_stashpvn(hvname, packlen, TRUE);
300 gvp = (GV**)hv_fetch(basestash, "ISA", 3, FALSE);
301 if (gvp && (gv = *gvp) != (GV*)&PL_sv_undef && (av = GvAV(gv))) {
302 gvp = (GV**)hv_fetch(stash, "ISA", 3, TRUE);
303 if (!gvp || !(gv = *gvp))
304 Perl_croak(aTHX_ "Cannot create %s::ISA", hvname);
305 if (SvTYPE(gv) != SVt_PVGV)
306 gv_init(gv, stash, "ISA", 3, TRUE);
307 SvREFCNT_dec(GvAV(gv));
308 GvAV(gv) = (AV*)SvREFCNT_inc(av);
314 SV** svp = AvARRAY(av);
315 /* NOTE: No support for tied ISA */
316 I32 items = AvFILLp(av) + 1;
318 SV* const sv = *svp++;
319 HV* const basestash = gv_stashsv(sv, FALSE);
321 if (ckWARN(WARN_MISC))
322 Perl_warner(aTHX_ packWARN(WARN_MISC), "Can't locate package %"SVf" for @%s::ISA",
326 gv = gv_fetchmeth(basestash, name, len,
327 (level >= 0) ? level + 1 : level - 1);
333 /* if at top level, try UNIVERSAL */
335 if (level == 0 || level == -1) {
336 HV* const lastchance = gv_stashpvn("UNIVERSAL", 9, FALSE);
339 if ((gv = gv_fetchmeth(lastchance, name, len,
340 (level >= 0) ? level + 1 : level - 1)))
344 * Cache method in topgv if:
345 * 1. topgv has no synonyms (else inheritance crosses wires)
346 * 2. method isn't a stub (else AUTOLOAD fails spectacularly)
349 GvREFCNT(topgv) == 1 &&
351 (CvROOT(cv) || CvXSUB(cv)))
353 if ((cv = GvCV(topgv)))
355 GvCV(topgv) = (CV*)SvREFCNT_inc(GvCV(gv));
356 GvCVGEN(topgv) = PL_sub_generation;
360 else if (topgv && GvREFCNT(topgv) == 1) {
361 /* cache the fact that the method is not defined */
362 GvCVGEN(topgv) = PL_sub_generation;
371 =for apidoc gv_fetchmeth_autoload
373 Same as gv_fetchmeth(), but looks for autoloaded subroutines too.
374 Returns a glob for the subroutine.
376 For an autoloaded subroutine without a GV, will create a GV even
377 if C<level < 0>. For an autoloaded subroutine without a stub, GvCV()
378 of the result may be zero.
384 Perl_gv_fetchmeth_autoload(pTHX_ HV *stash, const char *name, STRLEN len, I32 level)
386 GV *gv = gv_fetchmeth(stash, name, len, level);
393 return Nullgv; /* UNIVERSAL::AUTOLOAD could cause trouble */
394 if (len == S_autolen && strnEQ(name, S_autoload, S_autolen))
396 if (!(gv = gv_fetchmeth(stash, S_autoload, S_autolen, FALSE)))
399 if (!(CvROOT(cv) || CvXSUB(cv)))
401 /* Have an autoload */
402 if (level < 0) /* Cannot do without a stub */
403 gv_fetchmeth(stash, name, len, 0);
404 gvp = (GV**)hv_fetch(stash, name, len, (level >= 0));
413 =for apidoc gv_fetchmethod_autoload
415 Returns the glob which contains the subroutine to call to invoke the method
416 on the C<stash>. In fact in the presence of autoloading this may be the
417 glob for "AUTOLOAD". In this case the corresponding variable $AUTOLOAD is
420 The third parameter of C<gv_fetchmethod_autoload> determines whether
421 AUTOLOAD lookup is performed if the given method is not present: non-zero
422 means yes, look for AUTOLOAD; zero means no, don't look for AUTOLOAD.
423 Calling C<gv_fetchmethod> is equivalent to calling C<gv_fetchmethod_autoload>
424 with a non-zero C<autoload> parameter.
426 These functions grant C<"SUPER"> token as a prefix of the method name. Note
427 that if you want to keep the returned glob for a long time, you need to
428 check for it being "AUTOLOAD", since at the later time the call may load a
429 different subroutine due to $AUTOLOAD changing its value. Use the glob
430 created via a side effect to do this.
432 These functions have the same side-effects and as C<gv_fetchmeth> with
433 C<level==0>. C<name> should be writable if contains C<':'> or C<'
434 ''>. The warning against passing the GV returned by C<gv_fetchmeth> to
435 C<call_sv> apply equally to these functions.
441 Perl_gv_fetchmethod_autoload(pTHX_ HV *stash, const char *name, I32 autoload)
443 register const char *nend;
444 const char *nsplit = 0;
448 if (stash && SvTYPE(stash) < SVt_PVHV)
451 for (nend = name; *nend; nend++) {
454 else if (*nend == ':' && *(nend + 1) == ':')
458 const char * const origname = name;
462 if ((nsplit - origname) == 5 && strnEQ(origname, "SUPER", 5)) {
463 /* ->SUPER::method should really be looked up in original stash */
464 SV *tmpstr = sv_2mortal(Perl_newSVpvf(aTHX_ "%s::SUPER",
465 CopSTASHPV(PL_curcop)));
466 /* __PACKAGE__::SUPER stash should be autovivified */
467 stash = gv_stashpvn(SvPVX_const(tmpstr), SvCUR(tmpstr), TRUE);
468 DEBUG_o( Perl_deb(aTHX_ "Treating %s as %s::%s\n",
469 origname, HvNAME_get(stash), name) );
472 /* don't autovifify if ->NoSuchStash::method */
473 stash = gv_stashpvn(origname, nsplit - origname, FALSE);
475 /* however, explicit calls to Pkg::SUPER::method may
476 happen, and may require autovivification to work */
477 if (!stash && (nsplit - origname) >= 7 &&
478 strnEQ(nsplit - 7, "::SUPER", 7) &&
479 gv_stashpvn(origname, nsplit - origname - 7, FALSE))
480 stash = gv_stashpvn(origname, nsplit - origname, TRUE);
485 gv = gv_fetchmeth(stash, name, nend - name, 0);
487 if (strEQ(name,"import") || strEQ(name,"unimport"))
488 gv = (GV*)&PL_sv_yes;
490 gv = gv_autoload4(ostash, name, nend - name, TRUE);
493 CV* const cv = GvCV(gv);
494 if (!CvROOT(cv) && !CvXSUB(cv)) {
502 if (GvCV(stubgv) != cv) /* orphaned import */
505 autogv = gv_autoload4(GvSTASH(stubgv),
506 GvNAME(stubgv), GvNAMELEN(stubgv), TRUE);
516 Perl_gv_autoload4(pTHX_ HV *stash, const char *name, STRLEN len, I32 method)
524 const char *packname = "";
527 if (len == S_autolen && strnEQ(name, S_autoload, S_autolen))
530 if (SvTYPE(stash) < SVt_PVHV) {
531 packname = SvPV_const((SV*)stash, packname_len);
535 packname = HvNAME_get(stash);
536 packname_len = HvNAMELEN_get(stash);
539 if (!(gv = gv_fetchmeth(stash, S_autoload, S_autolen, FALSE)))
543 if (!(CvROOT(cv) || CvXSUB(cv)))
547 * Inheriting AUTOLOAD for non-methods works ... for now.
549 if (!method && (GvCVGEN(gv) || GvSTASH(gv) != stash)
550 && ckWARN2(WARN_DEPRECATED, WARN_SYNTAX)
552 Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX),
553 "Use of inherited AUTOLOAD for non-method %s::%.*s() is deprecated",
554 packname, (int)len, name);
557 /* rather than lookup/init $AUTOLOAD here
558 * only to have the XSUB do another lookup for $AUTOLOAD
559 * and split that value on the last '::',
560 * pass along the same data via some unused fields in the CV
563 SvPV_set(cv, (char *)name); /* cast to lose constness warning */
569 * Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name.
570 * The subroutine's original name may not be "AUTOLOAD", so we don't
571 * use that, but for lack of anything better we will use the sub's
572 * original package to look up $AUTOLOAD.
574 varstash = GvSTASH(CvGV(cv));
575 vargv = *(GV**)hv_fetch(varstash, S_autoload, S_autolen, TRUE);
579 gv_init(vargv, varstash, S_autoload, S_autolen, FALSE);
580 #ifdef PERL_DONT_CREATE_GVSV
581 GvSV(vargv) = NEWSV(72,0);
585 varsv = GvSVn(vargv);
586 sv_setpvn(varsv, packname, packname_len);
587 sv_catpvn(varsv, "::", 2);
588 sv_catpvn(varsv, name, len);
589 SvTAINTED_off(varsv);
593 /* The "gv" parameter should be the glob known to Perl code as *!
594 * The scalar must already have been magicalized.
597 S_require_errno(pTHX_ GV *gv)
600 HV* stash = gv_stashpvn("Errno",5,FALSE);
602 if (!stash || !(gv_fetchmethod(stash, "TIEHASH"))) {
606 save_scalar(gv); /* keep the value of $! */
607 Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT,
608 newSVpvn("Errno",5), Nullsv);
611 stash = gv_stashpvn("Errno",5,FALSE);
612 if (!stash || !(gv_fetchmethod(stash, "TIEHASH")))
613 Perl_croak(aTHX_ "Can't use %%! because Errno.pm is not available");
618 =for apidoc gv_stashpv
620 Returns a pointer to the stash for a specified package. C<name> should
621 be a valid UTF-8 string and must be null-terminated. If C<create> is set
622 then the package will be created if it does not already exist. If C<create>
623 is not set and the package does not exist then NULL is returned.
629 Perl_gv_stashpv(pTHX_ const char *name, I32 create)
631 return gv_stashpvn(name, strlen(name), create);
635 =for apidoc gv_stashpvn
637 Returns a pointer to the stash for a specified package. C<name> should
638 be a valid UTF-8 string. The C<namelen> parameter indicates the length of
639 the C<name>, in bytes. If C<create> is set then the package will be
640 created if it does not already exist. If C<create> is not set and the
641 package does not exist then NULL is returned.
647 Perl_gv_stashpvn(pTHX_ const char *name, U32 namelen, I32 create)
654 if (namelen + 3 < sizeof smallbuf)
657 Newx(tmpbuf, namelen + 3, char);
658 Copy(name,tmpbuf,namelen,char);
659 tmpbuf[namelen++] = ':';
660 tmpbuf[namelen++] = ':';
661 tmpbuf[namelen] = '\0';
662 tmpgv = gv_fetchpv(tmpbuf, create, SVt_PVHV);
663 if (tmpbuf != smallbuf)
668 GvHV(tmpgv) = newHV();
670 if (!HvNAME_get(stash))
671 hv_name_set(stash, name, namelen, 0);
676 =for apidoc gv_stashsv
678 Returns a pointer to the stash for a specified package, which must be a
679 valid UTF-8 string. See C<gv_stashpv>.
685 Perl_gv_stashsv(pTHX_ SV *sv, I32 create)
688 const char * const ptr = SvPV_const(sv,len);
689 return gv_stashpvn(ptr, len, create);
694 Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 add, I32 sv_type) {
695 return gv_fetchpvn_flags(nambeg, strlen(nambeg), add, sv_type);
699 Perl_gv_fetchsv(pTHX_ SV *name, I32 flags, I32 sv_type) {
701 const char * const nambeg = SvPV_const(name, len);
702 return gv_fetchpvn_flags(nambeg, len, flags | SvUTF8(name), sv_type);
706 Perl_gv_fetchpvn_flags(pTHX_ const char *nambeg, STRLEN full_len, I32 flags,
709 register const char *name = nambeg;
713 register const char *namend;
715 const I32 add = flags & ~SVf_UTF8;
717 PERL_UNUSED_ARG(full_len);
719 if (*name == '*' && isALPHA(name[1])) /* accidental stringify on a GV? */
722 for (namend = name; *namend; namend++) {
723 if ((*namend == ':' && namend[1] == ':')
724 || (*namend == '\'' && namend[1]))
728 if (!stash || !SvREFCNT(stash)) /* symbol table under destruction */
736 if (len + 3 < sizeof (smallbuf))
739 Newx(tmpbuf, len+3, char);
740 Copy(name, tmpbuf, len, char);
744 gvp = (GV**)hv_fetch(stash,tmpbuf,len,add);
745 gv = gvp ? *gvp : Nullgv;
746 if (gv && gv != (GV*)&PL_sv_undef) {
747 if (SvTYPE(gv) != SVt_PVGV)
748 gv_init(gv, stash, tmpbuf, len, (add & GV_ADDMULTI));
752 if (tmpbuf != smallbuf)
754 if (!gv || gv == (GV*)&PL_sv_undef)
757 if (!(stash = GvHV(gv)))
758 stash = GvHV(gv) = newHV();
760 if (!HvNAME_get(stash))
761 hv_name_set(stash, nambeg, namend - nambeg, 0);
769 return gv ? gv : (GV*)*hv_fetch(PL_defstash, "main::", 6, TRUE);
774 /* No stash in name, so see how we can default */
777 if (isIDFIRST_lazy(name)) {
780 /* name is always \0 terminated, and initial \0 wouldn't return
781 true from isIDFIRST_lazy, so we know that name[1] is defined */
788 if (strEQ(name, "INC") || strEQ(name, "ENV"))
792 if (strEQ(name, "SIG"))
796 if (strEQ(name, "STDIN") || strEQ(name, "STDOUT") ||
797 strEQ(name, "STDERR"))
801 if (strEQ(name, "ARGV") || strEQ(name, "ARGVOUT"))
808 else if (IN_PERL_COMPILETIME) {
810 if (add && (PL_hints & HINT_STRICT_VARS) &&
811 sv_type != SVt_PVCV &&
812 sv_type != SVt_PVGV &&
813 sv_type != SVt_PVFM &&
814 sv_type != SVt_PVIO &&
815 !(len == 1 && sv_type == SVt_PV &&
816 (*name == 'a' || *name == 'b')) )
818 gvp = (GV**)hv_fetch(stash,name,len,0);
820 *gvp == (GV*)&PL_sv_undef ||
821 SvTYPE(*gvp) != SVt_PVGV)
825 else if ((sv_type == SVt_PV && !GvIMPORTED_SV(*gvp)) ||
826 (sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp)) ||
827 (sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp)) )
829 Perl_warn(aTHX_ "Variable \"%c%s\" is not imported",
830 sv_type == SVt_PVAV ? '@' :
831 sv_type == SVt_PVHV ? '%' : '$',
834 Perl_warn(aTHX_ "\t(Did you mean &%s instead?)\n", name);
840 stash = CopSTASH(PL_curcop);
846 /* By this point we should have a stash and a name */
850 SV * const err = Perl_mess(aTHX_
851 "Global symbol \"%s%s\" requires explicit package name",
852 (sv_type == SVt_PV ? "$"
853 : sv_type == SVt_PVAV ? "@"
854 : sv_type == SVt_PVHV ? "%"
856 if (USE_UTF8_IN_NAMES)
859 stash = GvHV(gv_fetchpv("<none>::", GV_ADDMULTI, SVt_PVHV));
865 if (!SvREFCNT(stash)) /* symbol table under destruction */
868 gvp = (GV**)hv_fetch(stash,name,len,add);
869 if (!gvp || *gvp == (GV*)&PL_sv_undef)
872 if (SvTYPE(gv) == SVt_PVGV) {
875 gv_init_sv(gv, sv_type);
876 if (*name=='!' && sv_type == SVt_PVHV && len==1)
880 } else if (add & GV_NOINIT) {
884 /* Adding a new symbol */
886 if (add & GV_ADDWARN && ckWARN_d(WARN_INTERNAL))
887 Perl_warner(aTHX_ packWARN(WARN_INTERNAL), "Had to create %s unexpectedly", nambeg);
888 gv_init(gv, stash, name, len, add & GV_ADDMULTI);
889 gv_init_sv(gv, sv_type);
891 if (isALPHA(name[0]) && ! (isLEXWARN_on ? ckWARN(WARN_ONCE)
892 : (PL_dowarn & G_WARN_ON ) ) )
895 /* set up magic where warranted */
899 /* Nothing else to do.
900 The compiler will probably turn the switch statement into a
901 branch table. Make sure we avoid even that small overhead for
902 the common case of lower case variable names. */
906 const char * const name2 = name + 1;
909 if (strEQ(name2, "RGV")) {
910 IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START;
914 if (strnEQ(name2, "XPORT", 5))
918 if (strEQ(name2, "SA")) {
919 AV* const av = GvAVn(gv);
921 sv_magic((SV*)av, (SV*)gv, PERL_MAGIC_isa, Nullch, 0);
922 /* NOTE: No support for tied ISA */
923 if ((add & GV_ADDMULTI) && strEQ(nambeg,"AnyDBM_File::ISA")
924 && AvFILLp(av) == -1)
927 av_push(av, newSVpvn(pname = "NDBM_File",9));
928 gv_stashpvn(pname, 9, TRUE);
929 av_push(av, newSVpvn(pname = "DB_File",7));
930 gv_stashpvn(pname, 7, TRUE);
931 av_push(av, newSVpvn(pname = "GDBM_File",9));
932 gv_stashpvn(pname, 9, TRUE);
933 av_push(av, newSVpvn(pname = "SDBM_File",9));
934 gv_stashpvn(pname, 9, TRUE);
935 av_push(av, newSVpvn(pname = "ODBM_File",9));
936 gv_stashpvn(pname, 9, TRUE);
941 if (strEQ(name2, "VERLOAD")) {
942 HV* const hv = GvHVn(gv);
944 hv_magic(hv, Nullgv, PERL_MAGIC_overload);
948 if (strEQ(name2, "IG")) {
952 Newxz(PL_psig_ptr, SIG_SIZE, SV*);
953 Newxz(PL_psig_name, SIG_SIZE, SV*);
954 Newxz(PL_psig_pend, SIG_SIZE, int);
958 hv_magic(hv, Nullgv, PERL_MAGIC_sig);
959 for (i = 1; i < SIG_SIZE; i++) {
960 SV * const * const init = hv_fetch(hv, PL_sig_name[i], strlen(PL_sig_name[i]), 1);
962 sv_setsv(*init, &PL_sv_undef);
970 if (strEQ(name2, "ERSION"))
973 case '\003': /* $^CHILD_ERROR_NATIVE */
974 if (strEQ(name2, "HILD_ERROR_NATIVE"))
977 case '\005': /* $^ENCODING */
978 if (strEQ(name2, "NCODING"))
981 case '\017': /* $^OPEN */
982 if (strEQ(name2, "PEN"))
985 case '\024': /* ${^TAINT} */
986 if (strEQ(name2, "AINT"))
989 case '\025': /* ${^UNICODE}, ${^UTF8LOCALE} */
990 if (strEQ(name2, "NICODE"))
992 if (strEQ(name2, "TF8LOCALE"))
995 case '\027': /* $^WARNING_BITS */
996 if (strEQ(name2, "ARNING_BITS"))
1009 /* ensures variable is only digits */
1010 /* ${"1foo"} fails this test (and is thus writeable) */
1011 /* added by japhy, but borrowed from is_gv_magical */
1012 const char *end = name + len;
1013 while (--end > name) {
1014 if (!isDIGIT(*end)) return gv;
1021 /* Names of length 1. (Or 0. But name is NUL terminated, so that will
1022 be case '\0' in this switch statement (ie a default case) */
1028 sv_type == SVt_PVAV ||
1029 sv_type == SVt_PVHV ||
1030 sv_type == SVt_PVCV ||
1031 sv_type == SVt_PVFM ||
1034 PL_sawampersand = TRUE;
1038 sv_setpv(GvSVn(gv),PL_chopset);
1042 #ifdef COMPLEX_STATUS
1043 SvUPGRADE(GvSVn(gv), SVt_PVLV);
1049 /* If %! has been used, automatically load Errno.pm.
1050 The require will itself set errno, so in order to
1051 preserve its value we have to set up the magic
1052 now (rather than going to magicalize)
1055 sv_magic(GvSVn(gv), (SV*)gv, PERL_MAGIC_sv, name, len);
1057 if (sv_type == SVt_PVHV)
1063 AV* const av = GvAVn(gv);
1064 sv_magic((SV*)av, Nullsv, PERL_MAGIC_regdata, Nullch, 0);
1070 if (sv_type == SVt_PV && ckWARN2(WARN_DEPRECATED, WARN_SYNTAX))
1071 Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX),
1072 "$%c is no longer supported", *name);
1075 sv_setiv(GvSVn(gv), (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0);
1080 AV* const av = GvAVn(gv);
1081 sv_magic((SV*)av, (SV*)av, PERL_MAGIC_regdata, Nullch, 0);
1085 case '\023': /* $^S */
1096 SvREADONLY_on(GvSVn(gv));
1111 case '\001': /* $^A */
1112 case '\003': /* $^C */
1113 case '\004': /* $^D */
1114 case '\005': /* $^E */
1115 case '\006': /* $^F */
1116 case '\010': /* $^H */
1117 case '\011': /* $^I, NOT \t in EBCDIC */
1118 case '\016': /* $^N */
1119 case '\017': /* $^O */
1120 case '\020': /* $^P */
1121 case '\024': /* $^T */
1122 case '\027': /* $^W */
1124 sv_magic(GvSVn(gv), (SV*)gv, PERL_MAGIC_sv, name, len);
1127 case '\014': /* $^L */
1128 sv_setpvn(GvSVn(gv),"\f",1);
1129 PL_formfeed = GvSVn(gv);
1132 sv_setpvn(GvSVn(gv),"\034",1);
1136 SV * const sv = GvSVn(gv);
1137 if (!sv_derived_from(PL_patchlevel, "version"))
1138 (void *)upg_version(PL_patchlevel);
1139 GvSV(gv) = vnumify(PL_patchlevel);
1140 SvREADONLY_on(GvSV(gv));
1144 case '\026': /* $^V */
1146 SV * const sv = GvSVn(gv);
1147 GvSV(gv) = new_version(PL_patchlevel);
1148 SvREADONLY_on(GvSV(gv));
1158 Perl_gv_fullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain)
1162 const HV * const hv = GvSTASH(gv);
1167 sv_setpv(sv, prefix ? prefix : "");
1169 name = HvNAME_get(hv);
1171 namelen = HvNAMELEN_get(hv);
1177 if (keepmain || strNE(name, "main")) {
1178 sv_catpvn(sv,name,namelen);
1179 sv_catpvn(sv,"::", 2);
1181 sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv));
1185 Perl_gv_efullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain)
1187 const GV * const egv = GvEGV(gv);
1188 gv_fullname4(sv, egv ? egv : gv, prefix, keepmain);
1195 IO * const io = (IO*)NEWSV(0,0);
1197 sv_upgrade((SV *)io,SVt_PVIO);
1198 /* This used to read SvREFCNT(io) = 1;
1199 It's not clear why the reference count needed an explicit reset. NWC
1201 assert (SvREFCNT(io) == 1);
1203 /* Clear the stashcache because a new IO could overrule a package name */
1204 hv_clear(PL_stashcache);
1205 iogv = gv_fetchpv("FileHandle::", 0, SVt_PVHV);
1206 /* unless exists($main::{FileHandle}) and defined(%main::FileHandle::) */
1207 if (!(iogv && GvHV(iogv) && HvARRAY(GvHV(iogv))))
1208 iogv = gv_fetchpv("IO::Handle::", TRUE, SVt_PVHV);
1209 SvSTASH_set(io, (HV*)SvREFCNT_inc(GvHV(iogv)));
1214 Perl_gv_check(pTHX_ HV *stash)
1218 if (!HvARRAY(stash))
1220 for (i = 0; i <= (I32) HvMAX(stash); i++) {
1222 for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) {
1225 if (HeKEY(entry)[HeKLEN(entry)-1] == ':' &&
1226 (gv = (GV*)HeVAL(entry)) && isGV(gv) && (hv = GvHV(gv)))
1228 if (hv != PL_defstash && hv != stash)
1229 gv_check(hv); /* nested package */
1231 else if (isALPHA(*HeKEY(entry))) {
1233 gv = (GV*)HeVAL(entry);
1234 if (SvTYPE(gv) != SVt_PVGV || GvMULTI(gv))
1237 /* performance hack: if filename is absolute and it's a standard
1238 * module, don't bother warning */
1239 #ifdef MACOS_TRADITIONAL
1240 # define LIB_COMPONENT ":lib:"
1242 # define LIB_COMPONENT "/lib/"
1245 && PERL_FILE_IS_ABSOLUTE(file)
1246 && (instr(file, LIB_COMPONENT) || instr(file, ".pm")))
1250 CopLINE_set(PL_curcop, GvLINE(gv));
1252 CopFILE(PL_curcop) = (char *)file; /* set for warning */
1254 CopFILEGV(PL_curcop) = gv_fetchfile(file);
1256 Perl_warner(aTHX_ packWARN(WARN_ONCE),
1257 "Name \"%s::%s\" used only once: possible typo",
1258 HvNAME_get(stash), GvNAME(gv));
1265 Perl_newGVgen(pTHX_ const char *pack)
1267 return gv_fetchpv(Perl_form(aTHX_ "%s::_GEN_%ld", pack, (long)PL_gensym++),
1271 /* hopefully this is only called on local symbol table entries */
1274 Perl_gp_ref(pTHX_ GP *gp)
1281 /* multi-named GPs cannot be used for method cache */
1282 SvREFCNT_dec(gp->gp_cv);
1287 /* Adding a new name to a subroutine invalidates method cache */
1288 PL_sub_generation++;
1295 Perl_gp_free(pTHX_ GV *gv)
1299 if (!gv || !(gp = GvGP(gv)))
1301 if (gp->gp_refcnt == 0) {
1302 if (ckWARN_d(WARN_INTERNAL))
1303 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1304 "Attempt to free unreferenced glob pointers"
1305 pTHX__FORMAT pTHX__VALUE);
1309 /* Deleting the name of a subroutine invalidates method cache */
1310 PL_sub_generation++;
1312 if (--gp->gp_refcnt > 0) {
1313 if (gp->gp_egv == gv)
1318 if (gp->gp_sv) SvREFCNT_dec(gp->gp_sv);
1319 if (gp->gp_av) SvREFCNT_dec(gp->gp_av);
1320 /* FIXME - another reference loop GV -> symtab -> GV ?
1321 Somehow gp->gp_hv can end up pointing at freed garbage. */
1322 if (gp->gp_hv && SvTYPE(gp->gp_hv) == SVt_PVHV) {
1323 const char *hvname = HvNAME_get(gp->gp_hv);
1324 if (PL_stashcache && hvname)
1325 hv_delete(PL_stashcache, hvname, HvNAMELEN_get(gp->gp_hv),
1327 SvREFCNT_dec(gp->gp_hv);
1329 if (gp->gp_io) SvREFCNT_dec(gp->gp_io);
1330 if (gp->gp_cv) SvREFCNT_dec(gp->gp_cv);
1331 if (gp->gp_form) SvREFCNT_dec(gp->gp_form);
1338 Perl_magic_freeovrld(pTHX_ SV *sv, MAGIC *mg)
1340 AMT * const amtp = (AMT*)mg->mg_ptr;
1341 PERL_UNUSED_ARG(sv);
1343 if (amtp && AMT_AMAGIC(amtp)) {
1345 for (i = 1; i < NofAMmeth; i++) {
1346 CV * const cv = amtp->table[i];
1348 SvREFCNT_dec((SV *) cv);
1349 amtp->table[i] = Nullcv;
1356 /* Updates and caches the CV's */
1359 Perl_Gv_AMupdate(pTHX_ HV *stash)
1361 MAGIC* const mg = mg_find((SV*)stash, PERL_MAGIC_overload_table);
1362 AMT * const amtp = (mg) ? (AMT*)mg->mg_ptr: (AMT *) NULL;
1365 if (mg && amtp->was_ok_am == PL_amagic_generation
1366 && amtp->was_ok_sub == PL_sub_generation)
1367 return (bool)AMT_OVERLOADED(amtp);
1368 sv_unmagic((SV*)stash, PERL_MAGIC_overload_table);
1370 DEBUG_o( Perl_deb(aTHX_ "Recalcing overload magic in package %s\n",HvNAME_get(stash)) );
1373 amt.was_ok_am = PL_amagic_generation;
1374 amt.was_ok_sub = PL_sub_generation;
1375 amt.fallback = AMGfallNO;
1379 int filled = 0, have_ovl = 0;
1382 /* Work with "fallback" key, which we assume to be first in PL_AMG_names */
1384 /* Try to find via inheritance. */
1385 GV *gv = gv_fetchmeth(stash, PL_AMG_names[0], 2, -1);
1386 SV * const sv = gv ? GvSV(gv) : NULL;
1390 lim = DESTROY_amg; /* Skip overloading entries. */
1391 #ifdef PERL_DONT_CREATE_GVSV
1393 /* Equivalent to !SvTRUE and !SvOK */
1396 else if (SvTRUE(sv))
1397 amt.fallback=AMGfallYES;
1399 amt.fallback=AMGfallNEVER;
1401 for (i = 1; i < lim; i++)
1402 amt.table[i] = Nullcv;
1403 for (; i < NofAMmeth; i++) {
1404 const char *cooky = PL_AMG_names[i];
1405 /* Human-readable form, for debugging: */
1406 const char *cp = (i >= DESTROY_amg ? cooky : AMG_id2name(i));
1407 const STRLEN l = strlen(cooky);
1409 DEBUG_o( Perl_deb(aTHX_ "Checking overloading of \"%s\" in package \"%.256s\"\n",
1410 cp, HvNAME_get(stash)) );
1411 /* don't fill the cache while looking up!
1412 Creation of inheritance stubs in intermediate packages may
1413 conflict with the logic of runtime method substitution.
1414 Indeed, for inheritance A -> B -> C, if C overloads "+0",
1415 then we could have created stubs for "(+0" in A and C too.
1416 But if B overloads "bool", we may want to use it for
1417 numifying instead of C's "+0". */
1418 if (i >= DESTROY_amg)
1419 gv = Perl_gv_fetchmeth_autoload(aTHX_ stash, cooky, l, 0);
1420 else /* Autoload taken care of below */
1421 gv = Perl_gv_fetchmeth(aTHX_ stash, cooky, l, -1);
1423 if (gv && (cv = GvCV(gv))) {
1425 if (GvNAMELEN(CvGV(cv)) == 3 && strEQ(GvNAME(CvGV(cv)), "nil")
1426 && strEQ(hvname = HvNAME_get(GvSTASH(CvGV(cv))), "overload")) {
1427 /* This is a hack to support autoloading..., while
1428 knowing *which* methods were declared as overloaded. */
1429 /* GvSV contains the name of the method. */
1431 SV *gvsv = GvSV(gv);
1433 DEBUG_o( Perl_deb(aTHX_ "Resolving method \"%"SVf256\
1434 "\" for overloaded \"%s\" in package \"%.256s\"\n",
1435 GvSV(gv), cp, hvname) );
1436 if (!gvsv || !SvPOK(gvsv)
1437 || !(ngv = gv_fetchmethod_autoload(stash, SvPVX_const(gvsv),
1440 /* Can be an import stub (created by "can"). */
1441 const char * const name = (gvsv && SvPOK(gvsv)) ? SvPVX_const(gvsv) : "???";
1442 Perl_croak(aTHX_ "%s method \"%.256s\" overloading \"%s\" "\
1443 "in package \"%.256s\"",
1444 (GvCVGEN(gv) ? "Stub found while resolving"
1448 cv = GvCV(gv = ngv);
1450 DEBUG_o( Perl_deb(aTHX_ "Overloading \"%s\" in package \"%.256s\" via \"%.256s::%.256s\"\n",
1451 cp, HvNAME_get(stash), HvNAME_get(GvSTASH(CvGV(cv))),
1452 GvNAME(CvGV(cv))) );
1454 if (i < DESTROY_amg)
1456 } else if (gv) { /* Autoloaded... */
1460 amt.table[i]=(CV*)SvREFCNT_inc(cv);
1463 AMT_AMAGIC_on(&amt);
1465 AMT_OVERLOADED_on(&amt);
1466 sv_magic((SV*)stash, 0, PERL_MAGIC_overload_table,
1467 (char*)&amt, sizeof(AMT));
1471 /* Here we have no table: */
1473 AMT_AMAGIC_off(&amt);
1474 sv_magic((SV*)stash, 0, PERL_MAGIC_overload_table,
1475 (char*)&amt, sizeof(AMTS));
1481 Perl_gv_handler(pTHX_ HV *stash, I32 id)
1486 if (!stash || !HvNAME_get(stash))
1488 mg = mg_find((SV*)stash, PERL_MAGIC_overload_table);
1492 mg = mg_find((SV*)stash, PERL_MAGIC_overload_table);
1494 amtp = (AMT*)mg->mg_ptr;
1495 if ( amtp->was_ok_am != PL_amagic_generation
1496 || amtp->was_ok_sub != PL_sub_generation )
1498 if (AMT_AMAGIC(amtp)) {
1499 CV * const ret = amtp->table[id];
1500 if (ret && isGV(ret)) { /* Autoloading stab */
1501 /* Passing it through may have resulted in a warning
1502 "Inherited AUTOLOAD for a non-method deprecated", since
1503 our caller is going through a function call, not a method call.
1504 So return the CV for AUTOLOAD, setting $AUTOLOAD. */
1505 GV * const gv = gv_fetchmethod(stash, PL_AMG_names[id]);
1518 Perl_amagic_call(pTHX_ SV *left, SV *right, int method, int flags)
1523 CV **cvp=NULL, **ocvp=NULL;
1524 AMT *amtp=NULL, *oamtp=NULL;
1525 int off = 0, off1, lr = 0, notfound = 0;
1526 int postpr = 0, force_cpy = 0;
1527 int assign = AMGf_assign & flags;
1528 const int assignshift = assign ? 1 : 0;
1533 if (!(AMGf_noleft & flags) && SvAMAGIC(left)
1534 && (stash = SvSTASH(SvRV(left)))
1535 && (mg = mg_find((SV*)stash, PERL_MAGIC_overload_table))
1536 && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr)
1537 ? (oamtp = amtp = (AMT*)mg->mg_ptr)->table
1539 && ((cv = cvp[off=method+assignshift])
1540 || (assign && amtp->fallback > AMGfallNEVER && /* fallback to
1546 cv = cvp[off=method])))) {
1547 lr = -1; /* Call method for left argument */
1549 if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) {
1552 /* look for substituted methods */
1553 /* In all the covered cases we should be called with assign==0. */
1557 if ((cv = cvp[off=add_ass_amg])
1558 || ((cv = cvp[off = add_amg]) && (force_cpy = 0, postpr = 1))) {
1559 right = &PL_sv_yes; lr = -1; assign = 1;
1564 if ((cv = cvp[off = subtr_ass_amg])
1565 || ((cv = cvp[off = subtr_amg]) && (force_cpy = 0, postpr=1))) {
1566 right = &PL_sv_yes; lr = -1; assign = 1;
1570 (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg]));
1573 (void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg]));
1576 (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg]));
1579 (void)((cv = cvp[off=bool__amg])
1580 || (cv = cvp[off=numer_amg])
1581 || (cv = cvp[off=string_amg]));
1587 * SV* ref causes confusion with the interpreter variable of
1590 SV* const tmpRef=SvRV(left);
1591 if (!SvROK(tmpRef) && SvTYPE(tmpRef) <= SVt_PVMG) {
1593 * Just to be extra cautious. Maybe in some
1594 * additional cases sv_setsv is safe, too.
1596 SV* const newref = newSVsv(tmpRef);
1597 SvOBJECT_on(newref);
1598 SvSTASH_set(newref, (HV*)SvREFCNT_inc(SvSTASH(tmpRef)));
1604 if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg])
1605 && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) {
1606 SV* const nullsv=sv_2mortal(newSViv(0));
1608 SV* const lessp = amagic_call(left,nullsv,
1609 lt_amg,AMGf_noright);
1610 logic = SvTRUE(lessp);
1612 SV* const lessp = amagic_call(left,nullsv,
1613 ncmp_amg,AMGf_noright);
1614 logic = (SvNV(lessp) < 0);
1617 if (off==subtr_amg) {
1628 if ((cv = cvp[off=subtr_amg])) {
1630 left = sv_2mortal(newSViv(0));
1635 case iter_amg: /* XXXX Eventually should do to_gv. */
1637 return NULL; /* Delegate operation to standard mechanisms. */
1645 return left; /* Delegate operation to standard mechanisms. */
1650 if (!cv) goto not_found;
1651 } else if (!(AMGf_noright & flags) && SvAMAGIC(right)
1652 && (stash = SvSTASH(SvRV(right)))
1653 && (mg = mg_find((SV*)stash, PERL_MAGIC_overload_table))
1654 && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr)
1655 ? (amtp = (AMT*)mg->mg_ptr)->table
1657 && (cv = cvp[off=method])) { /* Method for right
1660 } else if (((ocvp && oamtp->fallback > AMGfallNEVER
1661 && (cvp=ocvp) && (lr = -1))
1662 || (cvp && amtp->fallback > AMGfallNEVER && (lr=1)))
1663 && !(flags & AMGf_unary)) {
1664 /* We look for substitution for
1665 * comparison operations and
1667 if (method==concat_amg || method==concat_ass_amg
1668 || method==repeat_amg || method==repeat_ass_amg) {
1669 return NULL; /* Delegate operation to string conversion */
1679 postpr = 1; off=ncmp_amg; break;
1686 postpr = 1; off=scmp_amg; break;
1688 if (off != -1) cv = cvp[off];
1693 not_found: /* No method found, either report or croak */
1701 return left; /* Delegate operation to standard mechanisms. */
1704 if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */
1705 notfound = 1; lr = -1;
1706 } else if (cvp && (cv=cvp[nomethod_amg])) {
1707 notfound = 1; lr = 1;
1710 if (off==-1) off=method;
1711 msg = sv_2mortal(Perl_newSVpvf(aTHX_
1712 "Operation \"%s\": no method found,%sargument %s%s%s%s",
1713 AMG_id2name(method + assignshift),
1714 (flags & AMGf_unary ? " " : "\n\tleft "),
1716 "in overloaded package ":
1717 "has no overloaded magic",
1719 HvNAME_get(SvSTASH(SvRV(left))):
1722 ",\n\tright argument in overloaded package ":
1725 : ",\n\tright argument has no overloaded magic"),
1727 HvNAME_get(SvSTASH(SvRV(right))):
1729 if (amtp && amtp->fallback >= AMGfallYES) {
1730 DEBUG_o( Perl_deb(aTHX_ "%s", SvPVX_const(msg)) );
1732 Perl_croak(aTHX_ "%"SVf, msg);
1736 force_cpy = force_cpy || assign;
1741 DEBUG_o(Perl_deb(aTHX_
1742 "Overloaded operator \"%s\"%s%s%s:\n\tmethod%s found%s in package %s%s\n",
1744 method+assignshift==off? "" :
1746 method+assignshift==off? "" :
1747 AMG_id2name(method+assignshift),
1748 method+assignshift==off? "" : "\")",
1749 flags & AMGf_unary? "" :
1750 lr==1 ? " for right argument": " for left argument",
1751 flags & AMGf_unary? " for argument" : "",
1752 stash ? HvNAME_get(stash) : "null",
1753 fl? ",\n\tassignment variant used": "") );
1756 /* Since we use shallow copy during assignment, we need
1757 * to dublicate the contents, probably calling user-supplied
1758 * version of copy operator
1760 /* We need to copy in following cases:
1761 * a) Assignment form was called.
1762 * assignshift==1, assign==T, method + 1 == off
1763 * b) Increment or decrement, called directly.
1764 * assignshift==0, assign==0, method + 0 == off
1765 * c) Increment or decrement, translated to assignment add/subtr.
1766 * assignshift==0, assign==T,
1768 * d) Increment or decrement, translated to nomethod.
1769 * assignshift==0, assign==0,
1771 * e) Assignment form translated to nomethod.
1772 * assignshift==1, assign==T, method + 1 != off
1775 /* off is method, method+assignshift, or a result of opcode substitution.
1776 * In the latter case assignshift==0, so only notfound case is important.
1778 if (( (method + assignshift == off)
1779 && (assign || (method == inc_amg) || (method == dec_amg)))
1786 const bool oldcatch = CATCH_GET;
1789 Zero(&myop, 1, BINOP);
1790 myop.op_last = (OP *) &myop;
1791 myop.op_next = Nullop;
1792 myop.op_flags = OPf_WANT_SCALAR | OPf_STACKED;
1794 PUSHSTACKi(PERLSI_OVERLOAD);
1797 PL_op = (OP *) &myop;
1798 if (PERLDB_SUB && PL_curstash != PL_debstash)
1799 PL_op->op_private |= OPpENTERSUB_DB;
1803 EXTEND(SP, notfound + 5);
1804 PUSHs(lr>0? right: left);
1805 PUSHs(lr>0? left: right);
1806 PUSHs( lr > 0 ? &PL_sv_yes : ( assign ? &PL_sv_undef : &PL_sv_no ));
1808 PUSHs( sv_2mortal(newSVpv(AMG_id2name(method + assignshift),0)));
1813 if ((PL_op = Perl_pp_entersub(aTHX)))
1821 CATCH_SET(oldcatch);
1828 ans=SvIV(res)<=0; break;
1831 ans=SvIV(res)<0; break;
1834 ans=SvIV(res)>=0; break;
1837 ans=SvIV(res)>0; break;
1840 ans=SvIV(res)==0; break;
1843 ans=SvIV(res)!=0; break;
1846 SvSetSV(left,res); return left;
1848 ans=!SvTRUE(res); break;
1853 } else if (method==copy_amg) {
1855 Perl_croak(aTHX_ "Copy method did not return a reference");
1857 return SvREFCNT_inc(SvRV(res));
1865 =for apidoc is_gv_magical_sv
1867 Returns C<TRUE> if given the name of a magical GV. Calls is_gv_magical.
1873 Perl_is_gv_magical_sv(pTHX_ SV *name, U32 flags)
1876 const char * const temp = SvPV_const(name, len);
1877 return is_gv_magical(temp, len, flags);
1881 =for apidoc is_gv_magical
1883 Returns C<TRUE> if given the name of a magical GV.
1885 Currently only useful internally when determining if a GV should be
1886 created even in rvalue contexts.
1888 C<flags> is not used at present but available for future extension to
1889 allow selecting particular classes of magical variable.
1891 Currently assumes that C<name> is NUL terminated (as well as len being valid).
1892 This assumption is met by all callers within the perl core, which all pass
1893 pointers returned by SvPV.
1898 Perl_is_gv_magical(pTHX_ const char *name, STRLEN len, U32 flags)
1900 PERL_UNUSED_ARG(flags);
1903 const char * const name1 = name + 1;
1906 if (len == 3 && name1[1] == 'S' && name[2] == 'A')
1910 if (len == 8 && strEQ(name1, "VERLOAD"))
1914 if (len == 3 && name[1] == 'I' && name[2] == 'G')
1917 /* Using ${^...} variables is likely to be sufficiently rare that
1918 it seems sensible to avoid the space hit of also checking the
1920 case '\017': /* ${^OPEN} */
1921 if (strEQ(name1, "PEN"))
1924 case '\024': /* ${^TAINT} */
1925 if (strEQ(name1, "AINT"))
1928 case '\025': /* ${^UNICODE} */
1929 if (strEQ(name1, "NICODE"))
1931 if (strEQ(name1, "TF8LOCALE"))
1934 case '\027': /* ${^WARNING_BITS} */
1935 if (strEQ(name1, "ARNING_BITS"))
1948 const char *end = name + len;
1949 while (--end > name) {
1957 /* Because we're already assuming that name is NUL terminated
1958 below, we can treat an empty name as "\0" */
1985 case '\001': /* $^A */
1986 case '\003': /* $^C */
1987 case '\004': /* $^D */
1988 case '\005': /* $^E */
1989 case '\006': /* $^F */
1990 case '\010': /* $^H */
1991 case '\011': /* $^I, NOT \t in EBCDIC */
1992 case '\014': /* $^L */
1993 case '\016': /* $^N */
1994 case '\017': /* $^O */
1995 case '\020': /* $^P */
1996 case '\023': /* $^S */
1997 case '\024': /* $^T */
1998 case '\026': /* $^V */
1999 case '\027': /* $^W */
2020 * c-indentation-style: bsd
2022 * indent-tabs-mode: t
2025 * ex: set ts=8 sts=4 sw=4 noet: