3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 * 2000, 2001, 2002, 2003, 2004, 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 $foo, @foo, %foo.
27 GVs are usually found as values in stashes (symbol table hashes) where
28 Perl stores its global variables.
38 Perl_gv_AVadd(pTHX_ register GV *gv)
40 if (!gv || SvTYPE((SV*)gv) != SVt_PVGV)
41 Perl_croak(aTHX_ "Bad symbol for array");
48 Perl_gv_HVadd(pTHX_ register GV *gv)
50 if (!gv || SvTYPE((SV*)gv) != SVt_PVGV)
51 Perl_croak(aTHX_ "Bad symbol for hash");
58 Perl_gv_IOadd(pTHX_ register GV *gv)
60 if (!gv || SvTYPE((SV*)gv) != SVt_PVGV)
61 Perl_croak(aTHX_ "Bad symbol for filehandle");
63 #ifdef GV_UNIQUE_CHECK
65 Perl_croak(aTHX_ "Bad symbol for filehandle (GV is unique)");
74 Perl_gv_fetchfile(pTHX_ const char *name)
84 tmplen = strlen(name) + 2;
85 if (tmplen < sizeof smallbuf)
88 New(603, tmpbuf, tmplen + 1, char);
89 /* This is where the debugger's %{"::_<$filename"} hash is created */
92 strcpy(tmpbuf + 2, name);
93 gv = *(GV**)hv_fetch(PL_defstash, tmpbuf, tmplen, TRUE);
95 gv_init(gv, PL_defstash, tmpbuf, tmplen, FALSE);
96 sv_setpv(GvSV(gv), name);
98 hv_magic(GvHVn(gv_AVadd(gv)), Nullgv, PERL_MAGIC_dbfile);
100 if (tmpbuf != smallbuf)
106 Perl_gv_init(pTHX_ GV *gv, HV *stash, const char *name, STRLEN len, int multi)
109 bool doproto = SvTYPE(gv) > SVt_NULL;
110 char *proto = (doproto && SvPOK(gv)) ? SvPVX(gv) : NULL;
112 sv_upgrade((SV*)gv, SVt_PVGV);
121 Newz(602, gp, 1, GP);
122 GvGP(gv) = gp_ref(gp);
123 GvSV(gv) = NEWSV(72,0);
124 GvLINE(gv) = CopLINE(PL_curcop);
125 GvFILE(gv) = CopFILE(PL_curcop) ? CopFILE(PL_curcop) : "";
128 sv_magic((SV*)gv, (SV*)gv, PERL_MAGIC_glob, Nullch, 0);
129 GvSTASH(gv) = (HV*)SvREFCNT_inc(stash);
130 GvNAME(gv) = savepvn(name, len);
132 if (multi || doproto) /* doproto means it _was_ mentioned */
134 if (doproto) { /* Replicate part of newSUB here. */
137 /* XXX unsafe for threads if eval_owner isn't held */
138 start_subparse(0,0); /* Create CV in compcv. */
139 GvCV(gv) = PL_compcv;
144 CvFILE_set_from_cop(GvCV(gv), PL_curcop);
145 CvSTASH(GvCV(gv)) = PL_curstash;
147 sv_setpv((SV*)GvCV(gv), proto);
154 S_gv_init_sv(pTHX_ GV *gv, I32 sv_type)
170 =for apidoc gv_fetchmeth
172 Returns the glob with the given C<name> and a defined subroutine or
173 C<NULL>. The glob lives in the given C<stash>, or in the stashes
174 accessible via @ISA and UNIVERSAL::.
176 The argument C<level> should be either 0 or -1. If C<level==0>, as a
177 side-effect creates a glob with the given C<name> in the given C<stash>
178 which in the case of success contains an alias for the subroutine, and sets
179 up caching info for this glob. Similarly for all the searched stashes.
181 This function grants C<"SUPER"> token as a postfix of the stash name. The
182 GV returned from C<gv_fetchmeth> may be a method cache entry, which is not
183 visible to Perl code. So when calling C<call_sv>, you should not use
184 the GV directly; instead, you should use the method's CV, which can be
185 obtained from the GV with the C<GvCV> macro.
191 Perl_gv_fetchmeth(pTHX_ HV *stash, const char *name, STRLEN len, I32 level)
199 /* UNIVERSAL methods should be callable without a stash */
201 level = -1; /* probably appropriate */
202 if(!(stash = gv_stashpvn("UNIVERSAL", 9, FALSE)))
208 "Can't use anonymous symbol table for method lookup");
210 if ((level > 100) || (level < -100))
211 Perl_croak(aTHX_ "Recursive inheritance detected while looking for method '%s' in package '%s'",
212 name, HvNAME(stash));
214 DEBUG_o( Perl_deb(aTHX_ "Looking for method %s in package %s\n",name,HvNAME(stash)) );
216 gvp = (GV**)hv_fetch(stash, name, len, (level >= 0));
221 if (SvTYPE(topgv) != SVt_PVGV)
222 gv_init(topgv, stash, name, len, TRUE);
223 if ((cv = GvCV(topgv))) {
224 /* If genuine method or valid cache entry, use it */
225 if (!GvCVGEN(topgv) || GvCVGEN(topgv) == PL_sub_generation)
227 /* Stale cached entry: junk it */
229 GvCV(topgv) = cv = Nullcv;
232 else if (GvCVGEN(topgv) == PL_sub_generation)
233 return 0; /* cache indicates sub doesn't exist */
236 gvp = (GV**)hv_fetch(stash, "ISA", 3, FALSE);
237 av = (gvp && (gv = *gvp) && gv != (GV*)&PL_sv_undef) ? GvAV(gv) : Nullav;
239 /* create and re-create @.*::SUPER::ISA on demand */
240 if (!av || !SvMAGIC(av)) {
241 char* packname = HvNAME(stash);
242 STRLEN packlen = strlen(packname);
244 if (packlen >= 7 && strEQ(packname + packlen - 7, "::SUPER")) {
248 basestash = gv_stashpvn(packname, packlen, TRUE);
249 gvp = (GV**)hv_fetch(basestash, "ISA", 3, FALSE);
250 if (gvp && (gv = *gvp) != (GV*)&PL_sv_undef && (av = GvAV(gv))) {
251 gvp = (GV**)hv_fetch(stash, "ISA", 3, TRUE);
252 if (!gvp || !(gv = *gvp))
253 Perl_croak(aTHX_ "Cannot create %s::ISA", HvNAME(stash));
254 if (SvTYPE(gv) != SVt_PVGV)
255 gv_init(gv, stash, "ISA", 3, TRUE);
256 SvREFCNT_dec(GvAV(gv));
257 GvAV(gv) = (AV*)SvREFCNT_inc(av);
263 SV** svp = AvARRAY(av);
264 /* NOTE: No support for tied ISA */
265 I32 items = AvFILLp(av) + 1;
268 HV* basestash = gv_stashsv(sv, FALSE);
270 if (ckWARN(WARN_MISC))
271 Perl_warner(aTHX_ packWARN(WARN_MISC), "Can't locate package %"SVf" for @%s::ISA",
275 gv = gv_fetchmeth(basestash, name, len,
276 (level >= 0) ? level + 1 : level - 1);
282 /* if at top level, try UNIVERSAL */
284 if (level == 0 || level == -1) {
287 if ((lastchance = gv_stashpvn("UNIVERSAL", 9, FALSE))) {
288 if ((gv = gv_fetchmeth(lastchance, name, len,
289 (level >= 0) ? level + 1 : level - 1)))
293 * Cache method in topgv if:
294 * 1. topgv has no synonyms (else inheritance crosses wires)
295 * 2. method isn't a stub (else AUTOLOAD fails spectacularly)
298 GvREFCNT(topgv) == 1 &&
300 (CvROOT(cv) || CvXSUB(cv)))
302 if ((cv = GvCV(topgv)))
304 GvCV(topgv) = (CV*)SvREFCNT_inc(GvCV(gv));
305 GvCVGEN(topgv) = PL_sub_generation;
309 else if (topgv && GvREFCNT(topgv) == 1) {
310 /* cache the fact that the method is not defined */
311 GvCVGEN(topgv) = PL_sub_generation;
320 =for apidoc gv_fetchmeth_autoload
322 Same as gv_fetchmeth(), but looks for autoloaded subroutines too.
323 Returns a glob for the subroutine.
325 For an autoloaded subroutine without a GV, will create a GV even
326 if C<level < 0>. For an autoloaded subroutine without a stub, GvCV()
327 of the result may be zero.
333 Perl_gv_fetchmeth_autoload(pTHX_ HV *stash, const char *name, STRLEN len, I32 level)
335 GV *gv = gv_fetchmeth(stash, name, len, level);
338 char autoload[] = "AUTOLOAD";
339 STRLEN autolen = sizeof(autoload)-1;
344 return Nullgv; /* UNIVERSAL::AUTOLOAD could cause trouble */
345 if (len == autolen && strnEQ(name, autoload, autolen))
347 if (!(gv = gv_fetchmeth(stash, autoload, autolen, FALSE)))
350 if (!(CvROOT(cv) || CvXSUB(cv)))
352 /* Have an autoload */
353 if (level < 0) /* Cannot do without a stub */
354 gv_fetchmeth(stash, name, len, 0);
355 gvp = (GV**)hv_fetch(stash, name, len, (level >= 0));
364 =for apidoc gv_fetchmethod
366 See L<gv_fetchmethod_autoload>.
372 Perl_gv_fetchmethod(pTHX_ HV *stash, const char *name)
374 return gv_fetchmethod_autoload(stash, name, TRUE);
378 =for apidoc gv_fetchmethod_autoload
380 Returns the glob which contains the subroutine to call to invoke the method
381 on the C<stash>. In fact in the presence of autoloading this may be the
382 glob for "AUTOLOAD". In this case the corresponding variable $AUTOLOAD is
385 The third parameter of C<gv_fetchmethod_autoload> determines whether
386 AUTOLOAD lookup is performed if the given method is not present: non-zero
387 means yes, look for AUTOLOAD; zero means no, don't look for AUTOLOAD.
388 Calling C<gv_fetchmethod> is equivalent to calling C<gv_fetchmethod_autoload>
389 with a non-zero C<autoload> parameter.
391 These functions grant C<"SUPER"> token as a prefix of the method name. Note
392 that if you want to keep the returned glob for a long time, you need to
393 check for it being "AUTOLOAD", since at the later time the call may load a
394 different subroutine due to $AUTOLOAD changing its value. Use the glob
395 created via a side effect to do this.
397 These functions have the same side-effects and as C<gv_fetchmeth> with
398 C<level==0>. C<name> should be writable if contains C<':'> or C<'
399 ''>. The warning against passing the GV returned by C<gv_fetchmeth> to
400 C<call_sv> apply equally to these functions.
406 Perl_gv_fetchmethod_autoload(pTHX_ HV *stash, const char *name, I32 autoload)
408 register const char *nend;
409 const char *nsplit = 0;
413 if (stash && SvTYPE(stash) < SVt_PVHV)
416 for (nend = name; *nend; nend++) {
419 else if (*nend == ':' && *(nend + 1) == ':')
423 const char *origname = name;
427 if ((nsplit - origname) == 5 && strnEQ(origname, "SUPER", 5)) {
428 /* ->SUPER::method should really be looked up in original stash */
429 SV *tmpstr = sv_2mortal(Perl_newSVpvf(aTHX_ "%s::SUPER",
430 CopSTASHPV(PL_curcop)));
431 /* __PACKAGE__::SUPER stash should be autovivified */
432 stash = gv_stashpvn(SvPVX(tmpstr), SvCUR(tmpstr), TRUE);
433 DEBUG_o( Perl_deb(aTHX_ "Treating %s as %s::%s\n",
434 origname, HvNAME(stash), name) );
437 /* don't autovifify if ->NoSuchStash::method */
438 stash = gv_stashpvn(origname, nsplit - origname, FALSE);
440 /* however, explicit calls to Pkg::SUPER::method may
441 happen, and may require autovivification to work */
442 if (!stash && (nsplit - origname) >= 7 &&
443 strnEQ(nsplit - 7, "::SUPER", 7) &&
444 gv_stashpvn(origname, nsplit - origname - 7, FALSE))
445 stash = gv_stashpvn(origname, nsplit - origname, TRUE);
450 gv = gv_fetchmeth(stash, name, nend - name, 0);
452 if (strEQ(name,"import") || strEQ(name,"unimport"))
453 gv = (GV*)&PL_sv_yes;
455 gv = gv_autoload4(ostash, name, nend - name, TRUE);
459 if (!CvROOT(cv) && !CvXSUB(cv)) {
467 if (GvCV(stubgv) != cv) /* orphaned import */
470 autogv = gv_autoload4(GvSTASH(stubgv),
471 GvNAME(stubgv), GvNAMELEN(stubgv), TRUE);
481 Perl_gv_autoload4(pTHX_ HV *stash, const char *name, STRLEN len, I32 method)
483 char autoload[] = "AUTOLOAD";
484 STRLEN autolen = sizeof(autoload)-1;
492 if (len == autolen && strnEQ(name, autoload, autolen))
495 if (SvTYPE(stash) < SVt_PVHV) {
496 packname = SvPV_nolen((SV*)stash);
500 packname = HvNAME(stash);
503 if (!(gv = gv_fetchmeth(stash, autoload, autolen, FALSE)))
507 if (!(CvROOT(cv) || CvXSUB(cv)))
511 * Inheriting AUTOLOAD for non-methods works ... for now.
513 if (ckWARN2(WARN_DEPRECATED, WARN_SYNTAX) && !method &&
514 (GvCVGEN(gv) || GvSTASH(gv) != stash))
515 Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX),
516 "Use of inherited AUTOLOAD for non-method %s::%.*s() is deprecated",
517 packname, (int)len, name);
520 /* rather than lookup/init $AUTOLOAD here
521 * only to have the XSUB do another lookup for $AUTOLOAD
522 * and split that value on the last '::',
523 * pass along the same data via some unused fields in the CV
526 SvPVX(cv) = (char *)name; /* cast to lose constness warning */
532 * Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name.
533 * The subroutine's original name may not be "AUTOLOAD", so we don't
534 * use that, but for lack of anything better we will use the sub's
535 * original package to look up $AUTOLOAD.
537 varstash = GvSTASH(CvGV(cv));
538 vargv = *(GV**)hv_fetch(varstash, autoload, autolen, TRUE);
542 gv_init(vargv, varstash, autoload, autolen, FALSE);
545 sv_setpv(varsv, packname);
546 sv_catpvn(varsv, "::", 2);
547 sv_catpvn(varsv, name, len);
548 SvTAINTED_off(varsv);
552 /* The "gv" parameter should be the glob known to Perl code as *!
553 * The scalar must already have been magicalized.
556 S_require_errno(pTHX_ GV *gv)
558 HV* stash = gv_stashpvn("Errno",5,FALSE);
560 if (!stash || !(gv_fetchmethod(stash, "TIEHASH"))) {
564 save_scalar(gv); /* keep the value of $! */
565 Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT,
566 newSVpvn("Errno",5), Nullsv);
569 stash = gv_stashpvn("Errno",5,FALSE);
570 if (!stash || !(gv_fetchmethod(stash, "TIEHASH")))
571 Perl_croak(aTHX_ "Can't use %%! because Errno.pm is not available");
576 =for apidoc gv_stashpv
578 Returns a pointer to the stash for a specified package. C<name> should
579 be a valid UTF-8 string and must be null-terminated. If C<create> is set
580 then the package will be created if it does not already exist. If C<create>
581 is not set and the package does not exist then NULL is returned.
587 Perl_gv_stashpv(pTHX_ const char *name, I32 create)
589 return gv_stashpvn(name, strlen(name), create);
593 =for apidoc gv_stashpvn
595 Returns a pointer to the stash for a specified package. C<name> should
596 be a valid UTF-8 string. The C<namelen> parameter indicates the length of
597 the C<name>, in bytes. If C<create> is set then the package will be
598 created if it does not already exist. If C<create> is not set and the
599 package does not exist then NULL is returned.
605 Perl_gv_stashpvn(pTHX_ const char *name, U32 namelen, I32 create)
612 if (namelen + 3 < sizeof smallbuf)
615 New(606, tmpbuf, namelen + 3, char);
616 Copy(name,tmpbuf,namelen,char);
617 tmpbuf[namelen++] = ':';
618 tmpbuf[namelen++] = ':';
619 tmpbuf[namelen] = '\0';
620 tmpgv = gv_fetchpv(tmpbuf, create, SVt_PVHV);
621 if (tmpbuf != smallbuf)
626 GvHV(tmpgv) = newHV();
629 HvNAME(stash) = savepv(name);
634 =for apidoc gv_stashsv
636 Returns a pointer to the stash for a specified package, which must be a
637 valid UTF-8 string. See C<gv_stashpv>.
643 Perl_gv_stashsv(pTHX_ SV *sv, I32 create)
648 return gv_stashpvn(ptr, len, create);
653 Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 add, I32 sv_type)
655 register const char *name = nambeg;
659 register const char *namend;
662 if (*name == '*' && isALPHA(name[1])) /* accidental stringify on a GV? */
665 for (namend = name; *namend; namend++) {
666 if ((*namend == ':' && namend[1] == ':')
667 || (*namend == '\'' && namend[1]))
671 if (!stash || !SvREFCNT(stash)) /* symbol table under destruction */
679 if (len + 3 < sizeof (smallbuf))
682 New(601, tmpbuf, len+3, char);
683 Copy(name, tmpbuf, len, char);
687 gvp = (GV**)hv_fetch(stash,tmpbuf,len,add);
688 gv = gvp ? *gvp : Nullgv;
689 if (gv && gv != (GV*)&PL_sv_undef) {
690 if (SvTYPE(gv) != SVt_PVGV)
691 gv_init(gv, stash, tmpbuf, len, (add & GV_ADDMULTI));
695 if (tmpbuf != smallbuf)
697 if (!gv || gv == (GV*)&PL_sv_undef)
700 if (!(stash = GvHV(gv)))
701 stash = GvHV(gv) = newHV();
704 HvNAME(stash) = savepvn(nambeg, namend - nambeg);
712 return gv ? gv : (GV*)*hv_fetch(PL_defstash, "main::", 6, TRUE);
717 /* No stash in name, so see how we can default */
720 if (isIDFIRST_lazy(name)) {
723 if (isUPPER(*name)) {
724 if (*name == 'S' && (
725 strEQ(name, "SIG") ||
726 strEQ(name, "STDIN") ||
727 strEQ(name, "STDOUT") ||
728 strEQ(name, "STDERR")))
730 else if (*name == 'I' && strEQ(name, "INC"))
732 else if (*name == 'E' && strEQ(name, "ENV"))
734 else if (*name == 'A' && (
735 strEQ(name, "ARGV") ||
736 strEQ(name, "ARGVOUT")))
739 else if (*name == '_' && !name[1])
744 else if (IN_PERL_COMPILETIME) {
746 if (add && (PL_hints & HINT_STRICT_VARS) &&
747 sv_type != SVt_PVCV &&
748 sv_type != SVt_PVGV &&
749 sv_type != SVt_PVFM &&
750 sv_type != SVt_PVIO &&
751 !(len == 1 && sv_type == SVt_PV &&
752 (*name == 'a' || *name == 'b')) )
754 gvp = (GV**)hv_fetch(stash,name,len,0);
756 *gvp == (GV*)&PL_sv_undef ||
757 SvTYPE(*gvp) != SVt_PVGV)
761 else if ((sv_type == SVt_PV && !GvIMPORTED_SV(*gvp)) ||
762 (sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp)) ||
763 (sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp)) )
765 Perl_warn(aTHX_ "Variable \"%c%s\" is not imported",
766 sv_type == SVt_PVAV ? '@' :
767 sv_type == SVt_PVHV ? '%' : '$',
770 Perl_warn(aTHX_ "\t(Did you mean &%s instead?)\n", name);
776 stash = CopSTASH(PL_curcop);
782 /* By this point we should have a stash and a name */
786 register SV *err = Perl_mess(aTHX_
787 "Global symbol \"%s%s\" requires explicit package name",
788 (sv_type == SVt_PV ? "$"
789 : sv_type == SVt_PVAV ? "@"
790 : sv_type == SVt_PVHV ? "%"
792 if (USE_UTF8_IN_NAMES)
795 stash = GvHV(gv_fetchpv("<none>::", GV_ADDMULTI, SVt_PVHV));
801 if (!SvREFCNT(stash)) /* symbol table under destruction */
804 gvp = (GV**)hv_fetch(stash,name,len,add);
805 if (!gvp || *gvp == (GV*)&PL_sv_undef)
808 if (SvTYPE(gv) == SVt_PVGV) {
811 gv_init_sv(gv, sv_type);
812 if (*name=='!' && sv_type == SVt_PVHV && len==1)
816 } else if (add & GV_NOINIT) {
820 /* Adding a new symbol */
822 if (add & GV_ADDWARN && ckWARN_d(WARN_INTERNAL))
823 Perl_warner(aTHX_ packWARN(WARN_INTERNAL), "Had to create %s unexpectedly", nambeg);
824 gv_init(gv, stash, name, len, add & GV_ADDMULTI);
825 gv_init_sv(gv, sv_type);
827 if (isALPHA(name[0]) && ! (isLEXWARN_on ? ckWARN(WARN_ONCE)
828 : (PL_dowarn & G_WARN_ON ) ) )
831 /* set up magic where warranted */
834 /* Nothing else to do.
835 The compile will probably turn the switch statement into a
836 branch table. Make sure we avoid even that small overhead for
837 the common case of lower case variable names. */
839 const char *name2 = name + 1;
842 if (strEQ(name2, "RGV")) {
843 IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START;
847 if (strnEQ(name2, "XPORT", 5))
851 if (strEQ(name2, "SA")) {
854 sv_magic((SV*)av, (SV*)gv, PERL_MAGIC_isa, Nullch, 0);
855 /* NOTE: No support for tied ISA */
856 if ((add & GV_ADDMULTI) && strEQ(nambeg,"AnyDBM_File::ISA")
857 && AvFILLp(av) == -1)
860 av_push(av, newSVpvn(pname = "NDBM_File",9));
861 gv_stashpvn(pname, 9, TRUE);
862 av_push(av, newSVpvn(pname = "DB_File",7));
863 gv_stashpvn(pname, 7, TRUE);
864 av_push(av, newSVpvn(pname = "GDBM_File",9));
865 gv_stashpvn(pname, 9, TRUE);
866 av_push(av, newSVpvn(pname = "SDBM_File",9));
867 gv_stashpvn(pname, 9, TRUE);
868 av_push(av, newSVpvn(pname = "ODBM_File",9));
869 gv_stashpvn(pname, 9, TRUE);
874 if (strEQ(name2, "VERLOAD")) {
877 hv_magic(hv, Nullgv, PERL_MAGIC_overload);
881 if (strEQ(name2, "IG")) {
885 Newz(73, PL_psig_ptr, SIG_SIZE, SV*);
886 Newz(73, PL_psig_name, SIG_SIZE, SV*);
887 Newz(73, PL_psig_pend, SIG_SIZE, int);
891 hv_magic(hv, Nullgv, PERL_MAGIC_sig);
892 for (i = 1; i < SIG_SIZE; i++) {
894 init = hv_fetch(hv, PL_sig_name[i], strlen(PL_sig_name[i]), 1);
896 sv_setsv(*init, &PL_sv_undef);
904 if (strEQ(name2, "ERSION"))
907 case '\005': /* $^ENCODING */
908 if (strEQ(name2, "NCODING"))
911 case '\017': /* $^OPEN */
912 if (strEQ(name2, "PEN"))
915 case '\024': /* ${^TAINT} */
916 if (strEQ(name2, "AINT"))
920 if (strEQ(name2, "NICODE"))
923 case '\027': /* $^WARNING_BITS */
924 if (strEQ(name2, "ARNING_BITS"))
937 /* ensures variable is only digits */
938 /* ${"1foo"} fails this test (and is thus writeable) */
939 /* added by japhy, but borrowed from is_gv_magical */
940 const char *end = name + len;
941 while (--end > name) {
942 if (!isDIGIT(*end)) return gv;
948 } else if (len == 1) {
949 /* Names of length 1. */
955 sv_type == SVt_PVAV ||
956 sv_type == SVt_PVHV ||
957 sv_type == SVt_PVCV ||
958 sv_type == SVt_PVFM ||
961 PL_sawampersand = TRUE;
965 sv_setpv(GvSV(gv),PL_chopset);
969 #ifdef COMPLEX_STATUS
970 (void)SvUPGRADE(GvSV(gv), SVt_PVLV);
976 /* If %! has been used, automatically load Errno.pm.
977 The require will itself set errno, so in order to
978 preserve its value we have to set up the magic
979 now (rather than going to magicalize)
982 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, len);
984 if (sv_type == SVt_PVHV)
991 sv_magic((SV*)av, Nullsv, PERL_MAGIC_regdata, Nullch, 0);
996 if (sv_type == SVt_PV && ckWARN2(WARN_DEPRECATED, WARN_SYNTAX))
997 Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX),
998 "$* is no longer supported");
1001 if (sv_type == SVt_PV && ckWARN2(WARN_DEPRECATED, WARN_SYNTAX))
1002 Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX),
1003 "Use of $# is deprecated");
1006 sv_setiv(GvSV(gv), (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0);
1012 sv_magic((SV*)av, (SV*)av, PERL_MAGIC_regdata, Nullch, 0);
1016 case '\023': /* $^S */
1027 SvREADONLY_on(GvSV(gv));
1042 case '\001': /* $^A */
1043 case '\003': /* $^C */
1044 case '\004': /* $^D */
1045 case '\005': /* $^E */
1046 case '\006': /* $^F */
1047 case '\010': /* $^H */
1048 case '\011': /* $^I, NOT \t in EBCDIC */
1049 case '\016': /* $^N */
1050 case '\017': /* $^O */
1051 case '\020': /* $^P */
1052 case '\024': /* $^T */
1053 case '\027': /* $^W */
1055 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, len);
1058 case '\014': /* $^L */
1059 sv_setpv(GvSV(gv),"\f");
1060 PL_formfeed = GvSV(gv);
1063 sv_setpv(GvSV(gv),"\034");
1068 if (!sv_derived_from(PL_patchlevel, "version"))
1069 (void *)upg_version(PL_patchlevel);
1070 GvSV(gv) = vnumify(PL_patchlevel);
1071 SvREADONLY_on(GvSV(gv));
1075 case '\026': /* $^V */
1078 GvSV(gv) = new_version(PL_patchlevel);
1079 SvREADONLY_on(GvSV(gv));
1089 Perl_gv_fullname4(pTHX_ SV *sv, GV *gv, const char *prefix, bool keepmain)
1092 HV *hv = GvSTASH(gv);
1097 sv_setpv(sv, prefix ? prefix : "");
1103 if (keepmain || strNE(name, "main")) {
1105 sv_catpvn(sv,"::", 2);
1107 sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv));
1111 Perl_gv_fullname3(pTHX_ SV *sv, GV *gv, const char *prefix)
1113 gv_fullname4(sv, gv, prefix, TRUE);
1117 Perl_gv_efullname4(pTHX_ SV *sv, GV *gv, const char *prefix, bool keepmain)
1119 GV *egv = GvEGV(gv);
1122 gv_fullname4(sv, egv, prefix, keepmain);
1126 Perl_gv_efullname3(pTHX_ SV *sv, GV *gv, const char *prefix)
1128 gv_efullname4(sv, gv, prefix, TRUE);
1131 /* XXX compatibility with versions <= 5.003. */
1133 Perl_gv_fullname(pTHX_ SV *sv, GV *gv)
1135 gv_fullname3(sv, gv, sv == (SV*)gv ? "*" : "");
1138 /* XXX compatibility with versions <= 5.003. */
1140 Perl_gv_efullname(pTHX_ SV *sv, GV *gv)
1142 gv_efullname3(sv, gv, sv == (SV*)gv ? "*" : "");
1151 io = (IO*)NEWSV(0,0);
1152 sv_upgrade((SV *)io,SVt_PVIO);
1155 /* Clear the stashcache because a new IO could overrule a
1157 hv_clear(PL_stashcache);
1158 iogv = gv_fetchpv("FileHandle::", FALSE, SVt_PVHV);
1159 /* unless exists($main::{FileHandle}) and defined(%main::FileHandle::) */
1160 if (!(iogv && GvHV(iogv) && HvARRAY(GvHV(iogv))))
1161 iogv = gv_fetchpv("IO::Handle::", TRUE, SVt_PVHV);
1162 SvSTASH(io) = (HV*)SvREFCNT_inc(GvHV(iogv));
1167 Perl_gv_check(pTHX_ HV *stash)
1174 if (!HvARRAY(stash))
1176 for (i = 0; i <= (I32) HvMAX(stash); i++) {
1177 for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) {
1178 if (HeKEY(entry)[HeKLEN(entry)-1] == ':' &&
1179 (gv = (GV*)HeVAL(entry)) && isGV(gv) && (hv = GvHV(gv)))
1181 if (hv != PL_defstash && hv != stash)
1182 gv_check(hv); /* nested package */
1184 else if (isALPHA(*HeKEY(entry))) {
1186 gv = (GV*)HeVAL(entry);
1187 if (SvTYPE(gv) != SVt_PVGV || GvMULTI(gv))
1190 /* performance hack: if filename is absolute and it's a standard
1191 * module, don't bother warning */
1193 && PERL_FILE_IS_ABSOLUTE(file)
1194 #ifdef MACOS_TRADITIONAL
1195 && (instr(file, ":lib:")
1197 && (instr(file, "/lib/")
1199 || instr(file, ".pm")))
1203 CopLINE_set(PL_curcop, GvLINE(gv));
1205 CopFILE(PL_curcop) = file; /* set for warning */
1207 CopFILEGV(PL_curcop) = gv_fetchfile(file);
1209 Perl_warner(aTHX_ packWARN(WARN_ONCE),
1210 "Name \"%s::%s\" used only once: possible typo",
1211 HvNAME(stash), GvNAME(gv));
1218 Perl_newGVgen(pTHX_ char *pack)
1220 return gv_fetchpv(Perl_form(aTHX_ "%s::_GEN_%ld", pack, (long)PL_gensym++),
1224 /* hopefully this is only called on local symbol table entries */
1227 Perl_gp_ref(pTHX_ GP *gp)
1234 /* multi-named GPs cannot be used for method cache */
1235 SvREFCNT_dec(gp->gp_cv);
1240 /* Adding a new name to a subroutine invalidates method cache */
1241 PL_sub_generation++;
1248 Perl_gp_free(pTHX_ GV *gv)
1252 if (!gv || !(gp = GvGP(gv)))
1254 if (gp->gp_refcnt == 0) {
1255 if (ckWARN_d(WARN_INTERNAL))
1256 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1257 "Attempt to free unreferenced glob pointers"
1258 pTHX__FORMAT pTHX__VALUE);
1262 /* Deleting the name of a subroutine invalidates method cache */
1263 PL_sub_generation++;
1265 if (--gp->gp_refcnt > 0) {
1266 if (gp->gp_egv == gv)
1271 if (gp->gp_sv) SvREFCNT_dec(gp->gp_sv);
1272 if (gp->gp_av) SvREFCNT_dec(gp->gp_av);
1274 if (PL_stashcache && HvNAME(gp->gp_hv))
1275 hv_delete(PL_stashcache,
1276 HvNAME(gp->gp_hv), strlen(HvNAME(gp->gp_hv)),
1278 SvREFCNT_dec(gp->gp_hv);
1280 if (gp->gp_io) SvREFCNT_dec(gp->gp_io);
1281 if (gp->gp_cv) SvREFCNT_dec(gp->gp_cv);
1282 if (gp->gp_form) SvREFCNT_dec(gp->gp_form);
1289 Perl_magic_freeovrld(pTHX_ SV *sv, MAGIC *mg)
1291 AMT *amtp = (AMT*)mg->mg_ptr;
1292 if (amtp && AMT_AMAGIC(amtp)) {
1294 for (i = 1; i < NofAMmeth; i++) {
1295 CV *cv = amtp->table[i];
1297 SvREFCNT_dec((SV *) cv);
1298 amtp->table[i] = Nullcv;
1305 /* Updates and caches the CV's */
1308 Perl_Gv_AMupdate(pTHX_ HV *stash)
1312 MAGIC* mg=mg_find((SV*)stash, PERL_MAGIC_overload_table);
1313 AMT *amtp = (mg) ? (AMT*)mg->mg_ptr: (AMT *) NULL;
1316 if (mg && amtp->was_ok_am == PL_amagic_generation
1317 && amtp->was_ok_sub == PL_sub_generation)
1318 return (bool)AMT_OVERLOADED(amtp);
1319 sv_unmagic((SV*)stash, PERL_MAGIC_overload_table);
1321 DEBUG_o( Perl_deb(aTHX_ "Recalcing overload magic in package %s\n",HvNAME(stash)) );
1324 amt.was_ok_am = PL_amagic_generation;
1325 amt.was_ok_sub = PL_sub_generation;
1326 amt.fallback = AMGfallNO;
1330 int filled = 0, have_ovl = 0;
1334 /* Work with "fallback" key, which we assume to be first in PL_AMG_names */
1336 /* Try to find via inheritance. */
1337 gv = gv_fetchmeth(stash, PL_AMG_names[0], 2, -1);
1342 lim = DESTROY_amg; /* Skip overloading entries. */
1343 else if (SvTRUE(sv))
1344 amt.fallback=AMGfallYES;
1346 amt.fallback=AMGfallNEVER;
1348 for (i = 1; i < lim; i++)
1349 amt.table[i] = Nullcv;
1350 for (; i < NofAMmeth; i++) {
1351 char *cooky = (char*)PL_AMG_names[i];
1352 /* Human-readable form, for debugging: */
1353 char *cp = (i >= DESTROY_amg ? cooky : AMG_id2name(i));
1354 STRLEN l = strlen(cooky);
1356 DEBUG_o( Perl_deb(aTHX_ "Checking overloading of `%s' in package `%.256s'\n",
1357 cp, HvNAME(stash)) );
1358 /* don't fill the cache while looking up!
1359 Creation of inheritance stubs in intermediate packages may
1360 conflict with the logic of runtime method substitution.
1361 Indeed, for inheritance A -> B -> C, if C overloads "+0",
1362 then we could have created stubs for "(+0" in A and C too.
1363 But if B overloads "bool", we may want to use it for
1364 numifying instead of C's "+0". */
1365 if (i >= DESTROY_amg)
1366 gv = Perl_gv_fetchmeth_autoload(aTHX_ stash, cooky, l, 0);
1367 else /* Autoload taken care of below */
1368 gv = Perl_gv_fetchmeth(aTHX_ stash, cooky, l, -1);
1370 if (gv && (cv = GvCV(gv))) {
1371 if (GvNAMELEN(CvGV(cv)) == 3 && strEQ(GvNAME(CvGV(cv)), "nil")
1372 && strEQ(HvNAME(GvSTASH(CvGV(cv))), "overload")) {
1373 /* This is a hack to support autoloading..., while
1374 knowing *which* methods were declared as overloaded. */
1375 /* GvSV contains the name of the method. */
1378 DEBUG_o( Perl_deb(aTHX_ "Resolving method `%"SVf256\
1379 "' for overloaded `%s' in package `%.256s'\n",
1380 GvSV(gv), cp, HvNAME(stash)) );
1381 if (!SvPOK(GvSV(gv))
1382 || !(ngv = gv_fetchmethod_autoload(stash, SvPVX(GvSV(gv)),
1385 /* Can be an import stub (created by `can'). */
1386 SV *gvsv = GvSV(gv);
1387 const char *name = SvPOK(gvsv) ? SvPVX(gvsv) : "???";
1388 Perl_croak(aTHX_ "%s method `%.256s' overloading `%s' "\
1389 "in package `%.256s'",
1390 (GvCVGEN(gv) ? "Stub found while resolving"
1392 name, cp, HvNAME(stash));
1394 cv = GvCV(gv = ngv);
1396 DEBUG_o( Perl_deb(aTHX_ "Overloading `%s' in package `%.256s' via `%.256s::%.256s' \n",
1397 cp, HvNAME(stash), HvNAME(GvSTASH(CvGV(cv))),
1398 GvNAME(CvGV(cv))) );
1400 if (i < DESTROY_amg)
1402 } else if (gv) { /* Autoloaded... */
1406 amt.table[i]=(CV*)SvREFCNT_inc(cv);
1409 AMT_AMAGIC_on(&amt);
1411 AMT_OVERLOADED_on(&amt);
1412 sv_magic((SV*)stash, 0, PERL_MAGIC_overload_table,
1413 (char*)&amt, sizeof(AMT));
1417 /* Here we have no table: */
1419 AMT_AMAGIC_off(&amt);
1420 sv_magic((SV*)stash, 0, PERL_MAGIC_overload_table,
1421 (char*)&amt, sizeof(AMTS));
1427 Perl_gv_handler(pTHX_ HV *stash, I32 id)
1433 if (!stash || !HvNAME(stash))
1435 mg = mg_find((SV*)stash, PERL_MAGIC_overload_table);
1439 mg = mg_find((SV*)stash, PERL_MAGIC_overload_table);
1441 amtp = (AMT*)mg->mg_ptr;
1442 if ( amtp->was_ok_am != PL_amagic_generation
1443 || amtp->was_ok_sub != PL_sub_generation )
1445 if (AMT_AMAGIC(amtp)) {
1446 ret = amtp->table[id];
1447 if (ret && isGV(ret)) { /* Autoloading stab */
1448 /* Passing it through may have resulted in a warning
1449 "Inherited AUTOLOAD for a non-method deprecated", since
1450 our caller is going through a function call, not a method call.
1451 So return the CV for AUTOLOAD, setting $AUTOLOAD. */
1452 GV *gv = gv_fetchmethod(stash, (char*)PL_AMG_names[id]);
1465 Perl_amagic_call(pTHX_ SV *left, SV *right, int method, int flags)
1469 CV **cvp=NULL, **ocvp=NULL;
1470 AMT *amtp=NULL, *oamtp=NULL;
1471 int off=0, off1, lr=0, assign=AMGf_assign & flags, notfound=0;
1472 int postpr = 0, force_cpy = 0, assignshift = assign ? 1 : 0;
1477 if (!(AMGf_noleft & flags) && SvAMAGIC(left)
1478 && (stash = SvSTASH(SvRV(left)))
1479 && (mg = mg_find((SV*)stash, PERL_MAGIC_overload_table))
1480 && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr)
1481 ? (oamtp = amtp = (AMT*)mg->mg_ptr)->table
1483 && ((cv = cvp[off=method+assignshift])
1484 || (assign && amtp->fallback > AMGfallNEVER && /* fallback to
1490 cv = cvp[off=method])))) {
1491 lr = -1; /* Call method for left argument */
1493 if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) {
1496 /* look for substituted methods */
1497 /* In all the covered cases we should be called with assign==0. */
1501 if ((cv = cvp[off=add_ass_amg])
1502 || ((cv = cvp[off = add_amg]) && (force_cpy = 0, postpr = 1))) {
1503 right = &PL_sv_yes; lr = -1; assign = 1;
1508 if ((cv = cvp[off = subtr_ass_amg])
1509 || ((cv = cvp[off = subtr_amg]) && (force_cpy = 0, postpr=1))) {
1510 right = &PL_sv_yes; lr = -1; assign = 1;
1514 (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg]));
1517 (void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg]));
1520 (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg]));
1523 (void)((cv = cvp[off=bool__amg])
1524 || (cv = cvp[off=numer_amg])
1525 || (cv = cvp[off=string_amg]));
1531 * SV* ref causes confusion with the interpreter variable of
1534 SV* tmpRef=SvRV(left);
1535 if (!SvROK(tmpRef) && SvTYPE(tmpRef) <= SVt_PVMG) {
1537 * Just to be extra cautious. Maybe in some
1538 * additional cases sv_setsv is safe, too.
1540 SV* newref = newSVsv(tmpRef);
1541 SvOBJECT_on(newref);
1542 SvSTASH(newref) = (HV*)SvREFCNT_inc(SvSTASH(tmpRef));
1548 if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg])
1549 && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) {
1550 SV* nullsv=sv_2mortal(newSViv(0));
1552 SV* lessp = amagic_call(left,nullsv,
1553 lt_amg,AMGf_noright);
1554 logic = SvTRUE(lessp);
1556 SV* lessp = amagic_call(left,nullsv,
1557 ncmp_amg,AMGf_noright);
1558 logic = (SvNV(lessp) < 0);
1561 if (off==subtr_amg) {
1572 if ((cv = cvp[off=subtr_amg])) {
1574 left = sv_2mortal(newSViv(0));
1579 case iter_amg: /* XXXX Eventually should do to_gv. */
1581 return NULL; /* Delegate operation to standard mechanisms. */
1589 return left; /* Delegate operation to standard mechanisms. */
1594 if (!cv) goto not_found;
1595 } else if (!(AMGf_noright & flags) && SvAMAGIC(right)
1596 && (stash = SvSTASH(SvRV(right)))
1597 && (mg = mg_find((SV*)stash, PERL_MAGIC_overload_table))
1598 && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr)
1599 ? (amtp = (AMT*)mg->mg_ptr)->table
1601 && (cv = cvp[off=method])) { /* Method for right
1604 } else if (((ocvp && oamtp->fallback > AMGfallNEVER
1605 && (cvp=ocvp) && (lr = -1))
1606 || (cvp && amtp->fallback > AMGfallNEVER && (lr=1)))
1607 && !(flags & AMGf_unary)) {
1608 /* We look for substitution for
1609 * comparison operations and
1611 if (method==concat_amg || method==concat_ass_amg
1612 || method==repeat_amg || method==repeat_ass_amg) {
1613 return NULL; /* Delegate operation to string conversion */
1623 postpr = 1; off=ncmp_amg; break;
1630 postpr = 1; off=scmp_amg; break;
1632 if (off != -1) cv = cvp[off];
1637 not_found: /* No method found, either report or croak */
1645 return left; /* Delegate operation to standard mechanisms. */
1648 if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */
1649 notfound = 1; lr = -1;
1650 } else if (cvp && (cv=cvp[nomethod_amg])) {
1651 notfound = 1; lr = 1;
1654 if (off==-1) off=method;
1655 msg = sv_2mortal(Perl_newSVpvf(aTHX_
1656 "Operation `%s': no method found,%sargument %s%s%s%s",
1657 AMG_id2name(method + assignshift),
1658 (flags & AMGf_unary ? " " : "\n\tleft "),
1660 "in overloaded package ":
1661 "has no overloaded magic",
1663 HvNAME(SvSTASH(SvRV(left))):
1666 ",\n\tright argument in overloaded package ":
1669 : ",\n\tright argument has no overloaded magic"),
1671 HvNAME(SvSTASH(SvRV(right))):
1673 if (amtp && amtp->fallback >= AMGfallYES) {
1674 DEBUG_o( Perl_deb(aTHX_ "%s", SvPVX(msg)) );
1676 Perl_croak(aTHX_ "%"SVf, msg);
1680 force_cpy = force_cpy || assign;
1685 DEBUG_o(Perl_deb(aTHX_
1686 "Overloaded operator `%s'%s%s%s:\n\tmethod%s found%s in package %s%s\n",
1688 method+assignshift==off? "" :
1690 method+assignshift==off? "" :
1691 AMG_id2name(method+assignshift),
1692 method+assignshift==off? "" : "')",
1693 flags & AMGf_unary? "" :
1694 lr==1 ? " for right argument": " for left argument",
1695 flags & AMGf_unary? " for argument" : "",
1696 stash ? HvNAME(stash) : "null",
1697 fl? ",\n\tassignment variant used": "") );
1700 /* Since we use shallow copy during assignment, we need
1701 * to dublicate the contents, probably calling user-supplied
1702 * version of copy operator
1704 /* We need to copy in following cases:
1705 * a) Assignment form was called.
1706 * assignshift==1, assign==T, method + 1 == off
1707 * b) Increment or decrement, called directly.
1708 * assignshift==0, assign==0, method + 0 == off
1709 * c) Increment or decrement, translated to assignment add/subtr.
1710 * assignshift==0, assign==T,
1712 * d) Increment or decrement, translated to nomethod.
1713 * assignshift==0, assign==0,
1715 * e) Assignment form translated to nomethod.
1716 * assignshift==1, assign==T, method + 1 != off
1719 /* off is method, method+assignshift, or a result of opcode substitution.
1720 * In the latter case assignshift==0, so only notfound case is important.
1722 if (( (method + assignshift == off)
1723 && (assign || (method == inc_amg) || (method == dec_amg)))
1730 bool oldcatch = CATCH_GET;
1733 Zero(&myop, 1, BINOP);
1734 myop.op_last = (OP *) &myop;
1735 myop.op_next = Nullop;
1736 myop.op_flags = OPf_WANT_SCALAR | OPf_STACKED;
1738 PUSHSTACKi(PERLSI_OVERLOAD);
1741 PL_op = (OP *) &myop;
1742 if (PERLDB_SUB && PL_curstash != PL_debstash)
1743 PL_op->op_private |= OPpENTERSUB_DB;
1747 EXTEND(SP, notfound + 5);
1748 PUSHs(lr>0? right: left);
1749 PUSHs(lr>0? left: right);
1750 PUSHs( lr > 0 ? &PL_sv_yes : ( assign ? &PL_sv_undef : &PL_sv_no ));
1752 PUSHs( sv_2mortal(newSVpv(AMG_id2name(method + assignshift),0)));
1757 if ((PL_op = Perl_pp_entersub(aTHX)))
1765 CATCH_SET(oldcatch);
1772 ans=SvIV(res)<=0; break;
1775 ans=SvIV(res)<0; break;
1778 ans=SvIV(res)>=0; break;
1781 ans=SvIV(res)>0; break;
1784 ans=SvIV(res)==0; break;
1787 ans=SvIV(res)!=0; break;
1790 SvSetSV(left,res); return left;
1792 ans=!SvTRUE(res); break;
1795 } else if (method==copy_amg) {
1797 Perl_croak(aTHX_ "Copy method did not return a reference");
1799 return SvREFCNT_inc(SvRV(res));
1807 =for apidoc is_gv_magical
1809 Returns C<TRUE> if given the name of a magical GV.
1811 Currently only useful internally when determining if a GV should be
1812 created even in rvalue contexts.
1814 C<flags> is not used at present but available for future extension to
1815 allow selecting particular classes of magical variable.
1820 Perl_is_gv_magical(pTHX_ char *name, STRLEN len, U32 flags)
1827 if (len == 3 && strEQ(name, "ISA"))
1831 if (len == 8 && strEQ(name, "OVERLOAD"))
1835 if (len == 3 && strEQ(name, "SIG"))
1838 case '\017': /* $^O & $^OPEN */
1840 || (len == 4 && strEQ(name, "\017PEN")))
1846 if (len > 1 && strEQ(name, "\025NICODE"))
1848 case '\027': /* $^W & $^WARNING_BITS */
1850 || (len == 12 && strEQ(name, "\027ARNING_BITS"))
1882 case '\001': /* $^A */
1883 case '\003': /* $^C */
1884 case '\004': /* $^D */
1885 case '\005': /* $^E */
1886 case '\006': /* $^F */
1887 case '\010': /* $^H */
1888 case '\011': /* $^I, NOT \t in EBCDIC */
1889 case '\014': /* $^L */
1890 case '\016': /* $^N */
1891 case '\020': /* $^P */
1892 case '\023': /* $^S */
1893 case '\026': /* $^V */
1897 case '\024': /* $^T, ${^TAINT} */
1898 if (len == 1 || strEQ(name, "\024AINT"))
1911 char *end = name + len;
1912 while (--end > name) {