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 $foo, @foo, %foo.
27 GVs are usually found as values in stashes (symbol table hashes) where
28 Perl stores its global variables.
38 Perl_gv_AVadd(pTHX_ register GV *gv)
40 if (!gv || SvTYPE((SV*)gv) != SVt_PVGV)
41 Perl_croak(aTHX_ "Bad symbol for array");
48 Perl_gv_HVadd(pTHX_ register GV *gv)
50 if (!gv || SvTYPE((SV*)gv) != SVt_PVGV)
51 Perl_croak(aTHX_ "Bad symbol for hash");
58 Perl_gv_IOadd(pTHX_ register GV *gv)
60 if (!gv || SvTYPE((SV*)gv) != SVt_PVGV)
61 Perl_croak(aTHX_ "Bad symbol for filehandle");
63 #ifdef GV_UNIQUE_CHECK
65 Perl_croak(aTHX_ "Bad symbol for filehandle (GV is unique)");
74 Perl_gv_fetchfile(pTHX_ const char *name)
84 tmplen = strlen(name) + 2;
85 if (tmplen < sizeof smallbuf)
88 New(603, tmpbuf, tmplen + 1, char);
89 /* This is where the debugger's %{"::_<$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 /* name is always \0 terminated, and initial \0 wouldn't return
724 true from isIDFIRST_lazy, so we know that name[1] is defined */
731 if (strEQ(name, "INC") || strEQ(name, "ENV"))
735 if (strEQ(name, "SIG"))
739 if (strEQ(name, "STDIN") || strEQ(name, "STDOUT") ||
740 strEQ(name, "STDERR"))
744 if (strEQ(name, "ARGV") || strEQ(name, "ARGVOUT"))
751 else if (IN_PERL_COMPILETIME) {
753 if (add && (PL_hints & HINT_STRICT_VARS) &&
754 sv_type != SVt_PVCV &&
755 sv_type != SVt_PVGV &&
756 sv_type != SVt_PVFM &&
757 sv_type != SVt_PVIO &&
758 !(len == 1 && sv_type == SVt_PV &&
759 (*name == 'a' || *name == 'b')) )
761 gvp = (GV**)hv_fetch(stash,name,len,0);
763 *gvp == (GV*)&PL_sv_undef ||
764 SvTYPE(*gvp) != SVt_PVGV)
768 else if ((sv_type == SVt_PV && !GvIMPORTED_SV(*gvp)) ||
769 (sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp)) ||
770 (sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp)) )
772 Perl_warn(aTHX_ "Variable \"%c%s\" is not imported",
773 sv_type == SVt_PVAV ? '@' :
774 sv_type == SVt_PVHV ? '%' : '$',
777 Perl_warn(aTHX_ "\t(Did you mean &%s instead?)\n", name);
783 stash = CopSTASH(PL_curcop);
789 /* By this point we should have a stash and a name */
793 register SV *err = Perl_mess(aTHX_
794 "Global symbol \"%s%s\" requires explicit package name",
795 (sv_type == SVt_PV ? "$"
796 : sv_type == SVt_PVAV ? "@"
797 : sv_type == SVt_PVHV ? "%"
799 if (USE_UTF8_IN_NAMES)
802 stash = GvHV(gv_fetchpv("<none>::", GV_ADDMULTI, SVt_PVHV));
808 if (!SvREFCNT(stash)) /* symbol table under destruction */
811 gvp = (GV**)hv_fetch(stash,name,len,add);
812 if (!gvp || *gvp == (GV*)&PL_sv_undef)
815 if (SvTYPE(gv) == SVt_PVGV) {
818 gv_init_sv(gv, sv_type);
819 if (*name=='!' && sv_type == SVt_PVHV && len==1)
823 } else if (add & GV_NOINIT) {
827 /* Adding a new symbol */
829 if (add & GV_ADDWARN && ckWARN_d(WARN_INTERNAL))
830 Perl_warner(aTHX_ packWARN(WARN_INTERNAL), "Had to create %s unexpectedly", nambeg);
831 gv_init(gv, stash, name, len, add & GV_ADDMULTI);
832 gv_init_sv(gv, sv_type);
834 if (isALPHA(name[0]) && ! (isLEXWARN_on ? ckWARN(WARN_ONCE)
835 : (PL_dowarn & G_WARN_ON ) ) )
838 /* set up magic where warranted */
842 /* Nothing else to do.
843 The compiler will probably turn the switch statement into a
844 branch table. Make sure we avoid even that small overhead for
845 the common case of lower case variable names. */
849 const char *name2 = name + 1;
852 if (strEQ(name2, "RGV")) {
853 IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START;
857 if (strnEQ(name2, "XPORT", 5))
861 if (strEQ(name2, "SA")) {
864 sv_magic((SV*)av, (SV*)gv, PERL_MAGIC_isa, Nullch, 0);
865 /* NOTE: No support for tied ISA */
866 if ((add & GV_ADDMULTI) && strEQ(nambeg,"AnyDBM_File::ISA")
867 && AvFILLp(av) == -1)
870 av_push(av, newSVpvn(pname = "NDBM_File",9));
871 gv_stashpvn(pname, 9, TRUE);
872 av_push(av, newSVpvn(pname = "DB_File",7));
873 gv_stashpvn(pname, 7, TRUE);
874 av_push(av, newSVpvn(pname = "GDBM_File",9));
875 gv_stashpvn(pname, 9, TRUE);
876 av_push(av, newSVpvn(pname = "SDBM_File",9));
877 gv_stashpvn(pname, 9, TRUE);
878 av_push(av, newSVpvn(pname = "ODBM_File",9));
879 gv_stashpvn(pname, 9, TRUE);
884 if (strEQ(name2, "VERLOAD")) {
887 hv_magic(hv, Nullgv, PERL_MAGIC_overload);
891 if (strEQ(name2, "IG")) {
895 Newz(73, PL_psig_ptr, SIG_SIZE, SV*);
896 Newz(73, PL_psig_name, SIG_SIZE, SV*);
897 Newz(73, PL_psig_pend, SIG_SIZE, int);
901 hv_magic(hv, Nullgv, PERL_MAGIC_sig);
902 for (i = 1; i < SIG_SIZE; i++) {
904 init = hv_fetch(hv, PL_sig_name[i], strlen(PL_sig_name[i]), 1);
906 sv_setsv(*init, &PL_sv_undef);
914 if (strEQ(name2, "ERSION"))
917 case '\005': /* $^ENCODING */
918 if (strEQ(name2, "NCODING"))
921 case '\017': /* $^OPEN */
922 if (strEQ(name2, "PEN"))
925 case '\024': /* ${^TAINT} */
926 if (strEQ(name2, "AINT"))
929 case '\025': /* $^UNICODE */
930 if (strEQ(name2, "NICODE"))
933 case '\027': /* $^WARNING_BITS */
934 if (strEQ(name2, "ARNING_BITS"))
947 /* ensures variable is only digits */
948 /* ${"1foo"} fails this test (and is thus writeable) */
949 /* added by japhy, but borrowed from is_gv_magical */
950 const char *end = name + len;
951 while (--end > name) {
952 if (!isDIGIT(*end)) return gv;
959 /* Names of length 1. (Or 0. But name is NUL terminated, so that will
960 be case '\0' in this switch statement (ie a default case) */
966 sv_type == SVt_PVAV ||
967 sv_type == SVt_PVHV ||
968 sv_type == SVt_PVCV ||
969 sv_type == SVt_PVFM ||
972 PL_sawampersand = TRUE;
976 sv_setpv(GvSV(gv),PL_chopset);
980 #ifdef COMPLEX_STATUS
981 (void)SvUPGRADE(GvSV(gv), SVt_PVLV);
987 /* If %! has been used, automatically load Errno.pm.
988 The require will itself set errno, so in order to
989 preserve its value we have to set up the magic
990 now (rather than going to magicalize)
993 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, len);
995 if (sv_type == SVt_PVHV)
1002 sv_magic((SV*)av, Nullsv, PERL_MAGIC_regdata, Nullch, 0);
1007 if (sv_type == SVt_PV && ckWARN2(WARN_DEPRECATED, WARN_SYNTAX))
1008 Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX),
1009 "$* is no longer supported");
1012 if (sv_type == SVt_PV && ckWARN2(WARN_DEPRECATED, WARN_SYNTAX))
1013 Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX),
1014 "Use of $# is deprecated");
1017 sv_setiv(GvSV(gv), (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0);
1023 sv_magic((SV*)av, (SV*)av, PERL_MAGIC_regdata, Nullch, 0);
1027 case '\023': /* $^S */
1038 SvREADONLY_on(GvSV(gv));
1053 case '\001': /* $^A */
1054 case '\003': /* $^C */
1055 case '\004': /* $^D */
1056 case '\005': /* $^E */
1057 case '\006': /* $^F */
1058 case '\010': /* $^H */
1059 case '\011': /* $^I, NOT \t in EBCDIC */
1060 case '\016': /* $^N */
1061 case '\017': /* $^O */
1062 case '\020': /* $^P */
1063 case '\024': /* $^T */
1064 case '\027': /* $^W */
1066 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, len);
1069 case '\014': /* $^L */
1070 sv_setpv(GvSV(gv),"\f");
1071 PL_formfeed = GvSV(gv);
1074 sv_setpv(GvSV(gv),"\034");
1079 if (!sv_derived_from(PL_patchlevel, "version"))
1080 (void *)upg_version(PL_patchlevel);
1081 GvSV(gv) = vnumify(PL_patchlevel);
1082 SvREADONLY_on(GvSV(gv));
1086 case '\026': /* $^V */
1089 GvSV(gv) = new_version(PL_patchlevel);
1090 SvREADONLY_on(GvSV(gv));
1100 Perl_gv_fullname4(pTHX_ SV *sv, GV *gv, const char *prefix, bool keepmain)
1103 HV *hv = GvSTASH(gv);
1108 sv_setpv(sv, prefix ? prefix : "");
1114 if (keepmain || strNE(name, "main")) {
1116 sv_catpvn(sv,"::", 2);
1118 sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv));
1122 Perl_gv_fullname3(pTHX_ SV *sv, GV *gv, const char *prefix)
1124 gv_fullname4(sv, gv, prefix, TRUE);
1128 Perl_gv_efullname4(pTHX_ SV *sv, GV *gv, const char *prefix, bool keepmain)
1130 GV *egv = GvEGV(gv);
1133 gv_fullname4(sv, egv, prefix, keepmain);
1137 Perl_gv_efullname3(pTHX_ SV *sv, GV *gv, const char *prefix)
1139 gv_efullname4(sv, gv, prefix, TRUE);
1142 /* XXX compatibility with versions <= 5.003. */
1144 Perl_gv_fullname(pTHX_ SV *sv, GV *gv)
1146 gv_fullname3(sv, gv, sv == (SV*)gv ? "*" : "");
1149 /* XXX compatibility with versions <= 5.003. */
1151 Perl_gv_efullname(pTHX_ SV *sv, GV *gv)
1153 gv_efullname3(sv, gv, sv == (SV*)gv ? "*" : "");
1162 io = (IO*)NEWSV(0,0);
1163 sv_upgrade((SV *)io,SVt_PVIO);
1166 /* Clear the stashcache because a new IO could overrule a
1168 hv_clear(PL_stashcache);
1169 iogv = gv_fetchpv("FileHandle::", FALSE, SVt_PVHV);
1170 /* unless exists($main::{FileHandle}) and defined(%main::FileHandle::) */
1171 if (!(iogv && GvHV(iogv) && HvARRAY(GvHV(iogv))))
1172 iogv = gv_fetchpv("IO::Handle::", TRUE, SVt_PVHV);
1173 SvSTASH(io) = (HV*)SvREFCNT_inc(GvHV(iogv));
1178 Perl_gv_check(pTHX_ HV *stash)
1185 if (!HvARRAY(stash))
1187 for (i = 0; i <= (I32) HvMAX(stash); i++) {
1188 for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) {
1189 if (HeKEY(entry)[HeKLEN(entry)-1] == ':' &&
1190 (gv = (GV*)HeVAL(entry)) && isGV(gv) && (hv = GvHV(gv)))
1192 if (hv != PL_defstash && hv != stash)
1193 gv_check(hv); /* nested package */
1195 else if (isALPHA(*HeKEY(entry))) {
1197 gv = (GV*)HeVAL(entry);
1198 if (SvTYPE(gv) != SVt_PVGV || GvMULTI(gv))
1201 /* performance hack: if filename is absolute and it's a standard
1202 * module, don't bother warning */
1204 && PERL_FILE_IS_ABSOLUTE(file)
1205 #ifdef MACOS_TRADITIONAL
1206 && (instr(file, ":lib:")
1208 && (instr(file, "/lib/")
1210 || instr(file, ".pm")))
1214 CopLINE_set(PL_curcop, GvLINE(gv));
1216 CopFILE(PL_curcop) = file; /* set for warning */
1218 CopFILEGV(PL_curcop) = gv_fetchfile(file);
1220 Perl_warner(aTHX_ packWARN(WARN_ONCE),
1221 "Name \"%s::%s\" used only once: possible typo",
1222 HvNAME(stash), GvNAME(gv));
1229 Perl_newGVgen(pTHX_ char *pack)
1231 return gv_fetchpv(Perl_form(aTHX_ "%s::_GEN_%ld", pack, (long)PL_gensym++),
1235 /* hopefully this is only called on local symbol table entries */
1238 Perl_gp_ref(pTHX_ GP *gp)
1245 /* multi-named GPs cannot be used for method cache */
1246 SvREFCNT_dec(gp->gp_cv);
1251 /* Adding a new name to a subroutine invalidates method cache */
1252 PL_sub_generation++;
1259 Perl_gp_free(pTHX_ GV *gv)
1263 if (!gv || !(gp = GvGP(gv)))
1265 if (gp->gp_refcnt == 0) {
1266 if (ckWARN_d(WARN_INTERNAL))
1267 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1268 "Attempt to free unreferenced glob pointers"
1269 pTHX__FORMAT pTHX__VALUE);
1273 /* Deleting the name of a subroutine invalidates method cache */
1274 PL_sub_generation++;
1276 if (--gp->gp_refcnt > 0) {
1277 if (gp->gp_egv == gv)
1282 if (gp->gp_sv) SvREFCNT_dec(gp->gp_sv);
1283 if (gp->gp_av) SvREFCNT_dec(gp->gp_av);
1285 if (PL_stashcache && HvNAME(gp->gp_hv))
1286 hv_delete(PL_stashcache,
1287 HvNAME(gp->gp_hv), strlen(HvNAME(gp->gp_hv)),
1289 SvREFCNT_dec(gp->gp_hv);
1291 if (gp->gp_io) SvREFCNT_dec(gp->gp_io);
1292 if (gp->gp_cv) SvREFCNT_dec(gp->gp_cv);
1293 if (gp->gp_form) SvREFCNT_dec(gp->gp_form);
1300 Perl_magic_freeovrld(pTHX_ SV *sv, MAGIC *mg)
1302 AMT *amtp = (AMT*)mg->mg_ptr;
1303 if (amtp && AMT_AMAGIC(amtp)) {
1305 for (i = 1; i < NofAMmeth; i++) {
1306 CV *cv = amtp->table[i];
1308 SvREFCNT_dec((SV *) cv);
1309 amtp->table[i] = Nullcv;
1316 /* Updates and caches the CV's */
1319 Perl_Gv_AMupdate(pTHX_ HV *stash)
1323 MAGIC* mg=mg_find((SV*)stash, PERL_MAGIC_overload_table);
1324 AMT *amtp = (mg) ? (AMT*)mg->mg_ptr: (AMT *) NULL;
1327 if (mg && amtp->was_ok_am == PL_amagic_generation
1328 && amtp->was_ok_sub == PL_sub_generation)
1329 return (bool)AMT_OVERLOADED(amtp);
1330 sv_unmagic((SV*)stash, PERL_MAGIC_overload_table);
1332 DEBUG_o( Perl_deb(aTHX_ "Recalcing overload magic in package %s\n",HvNAME(stash)) );
1335 amt.was_ok_am = PL_amagic_generation;
1336 amt.was_ok_sub = PL_sub_generation;
1337 amt.fallback = AMGfallNO;
1341 int filled = 0, have_ovl = 0;
1345 /* Work with "fallback" key, which we assume to be first in PL_AMG_names */
1347 /* Try to find via inheritance. */
1348 gv = gv_fetchmeth(stash, PL_AMG_names[0], 2, -1);
1353 lim = DESTROY_amg; /* Skip overloading entries. */
1354 else if (SvTRUE(sv))
1355 amt.fallback=AMGfallYES;
1357 amt.fallback=AMGfallNEVER;
1359 for (i = 1; i < lim; i++)
1360 amt.table[i] = Nullcv;
1361 for (; i < NofAMmeth; i++) {
1362 char *cooky = (char*)PL_AMG_names[i];
1363 /* Human-readable form, for debugging: */
1364 char *cp = (i >= DESTROY_amg ? cooky : AMG_id2name(i));
1365 STRLEN l = strlen(cooky);
1367 DEBUG_o( Perl_deb(aTHX_ "Checking overloading of `%s' in package `%.256s'\n",
1368 cp, HvNAME(stash)) );
1369 /* don't fill the cache while looking up!
1370 Creation of inheritance stubs in intermediate packages may
1371 conflict with the logic of runtime method substitution.
1372 Indeed, for inheritance A -> B -> C, if C overloads "+0",
1373 then we could have created stubs for "(+0" in A and C too.
1374 But if B overloads "bool", we may want to use it for
1375 numifying instead of C's "+0". */
1376 if (i >= DESTROY_amg)
1377 gv = Perl_gv_fetchmeth_autoload(aTHX_ stash, cooky, l, 0);
1378 else /* Autoload taken care of below */
1379 gv = Perl_gv_fetchmeth(aTHX_ stash, cooky, l, -1);
1381 if (gv && (cv = GvCV(gv))) {
1382 if (GvNAMELEN(CvGV(cv)) == 3 && strEQ(GvNAME(CvGV(cv)), "nil")
1383 && strEQ(HvNAME(GvSTASH(CvGV(cv))), "overload")) {
1384 /* This is a hack to support autoloading..., while
1385 knowing *which* methods were declared as overloaded. */
1386 /* GvSV contains the name of the method. */
1389 DEBUG_o( Perl_deb(aTHX_ "Resolving method `%"SVf256\
1390 "' for overloaded `%s' in package `%.256s'\n",
1391 GvSV(gv), cp, HvNAME(stash)) );
1392 if (!SvPOK(GvSV(gv))
1393 || !(ngv = gv_fetchmethod_autoload(stash, SvPVX(GvSV(gv)),
1396 /* Can be an import stub (created by `can'). */
1397 SV *gvsv = GvSV(gv);
1398 const char *name = SvPOK(gvsv) ? SvPVX(gvsv) : "???";
1399 Perl_croak(aTHX_ "%s method `%.256s' overloading `%s' "\
1400 "in package `%.256s'",
1401 (GvCVGEN(gv) ? "Stub found while resolving"
1403 name, cp, HvNAME(stash));
1405 cv = GvCV(gv = ngv);
1407 DEBUG_o( Perl_deb(aTHX_ "Overloading `%s' in package `%.256s' via `%.256s::%.256s' \n",
1408 cp, HvNAME(stash), HvNAME(GvSTASH(CvGV(cv))),
1409 GvNAME(CvGV(cv))) );
1411 if (i < DESTROY_amg)
1413 } else if (gv) { /* Autoloaded... */
1417 amt.table[i]=(CV*)SvREFCNT_inc(cv);
1420 AMT_AMAGIC_on(&amt);
1422 AMT_OVERLOADED_on(&amt);
1423 sv_magic((SV*)stash, 0, PERL_MAGIC_overload_table,
1424 (char*)&amt, sizeof(AMT));
1428 /* Here we have no table: */
1430 AMT_AMAGIC_off(&amt);
1431 sv_magic((SV*)stash, 0, PERL_MAGIC_overload_table,
1432 (char*)&amt, sizeof(AMTS));
1438 Perl_gv_handler(pTHX_ HV *stash, I32 id)
1444 if (!stash || !HvNAME(stash))
1446 mg = mg_find((SV*)stash, PERL_MAGIC_overload_table);
1450 mg = mg_find((SV*)stash, PERL_MAGIC_overload_table);
1452 amtp = (AMT*)mg->mg_ptr;
1453 if ( amtp->was_ok_am != PL_amagic_generation
1454 || amtp->was_ok_sub != PL_sub_generation )
1456 if (AMT_AMAGIC(amtp)) {
1457 ret = amtp->table[id];
1458 if (ret && isGV(ret)) { /* Autoloading stab */
1459 /* Passing it through may have resulted in a warning
1460 "Inherited AUTOLOAD for a non-method deprecated", since
1461 our caller is going through a function call, not a method call.
1462 So return the CV for AUTOLOAD, setting $AUTOLOAD. */
1463 GV *gv = gv_fetchmethod(stash, (char*)PL_AMG_names[id]);
1476 Perl_amagic_call(pTHX_ SV *left, SV *right, int method, int flags)
1480 CV **cvp=NULL, **ocvp=NULL;
1481 AMT *amtp=NULL, *oamtp=NULL;
1482 int off=0, off1, lr=0, assign=AMGf_assign & flags, notfound=0;
1483 int postpr = 0, force_cpy = 0, assignshift = assign ? 1 : 0;
1488 if (!(AMGf_noleft & flags) && SvAMAGIC(left)
1489 && (stash = SvSTASH(SvRV(left)))
1490 && (mg = mg_find((SV*)stash, PERL_MAGIC_overload_table))
1491 && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr)
1492 ? (oamtp = amtp = (AMT*)mg->mg_ptr)->table
1494 && ((cv = cvp[off=method+assignshift])
1495 || (assign && amtp->fallback > AMGfallNEVER && /* fallback to
1501 cv = cvp[off=method])))) {
1502 lr = -1; /* Call method for left argument */
1504 if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) {
1507 /* look for substituted methods */
1508 /* In all the covered cases we should be called with assign==0. */
1512 if ((cv = cvp[off=add_ass_amg])
1513 || ((cv = cvp[off = add_amg]) && (force_cpy = 0, postpr = 1))) {
1514 right = &PL_sv_yes; lr = -1; assign = 1;
1519 if ((cv = cvp[off = subtr_ass_amg])
1520 || ((cv = cvp[off = subtr_amg]) && (force_cpy = 0, postpr=1))) {
1521 right = &PL_sv_yes; lr = -1; assign = 1;
1525 (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg]));
1528 (void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg]));
1531 (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg]));
1534 (void)((cv = cvp[off=bool__amg])
1535 || (cv = cvp[off=numer_amg])
1536 || (cv = cvp[off=string_amg]));
1542 * SV* ref causes confusion with the interpreter variable of
1545 SV* tmpRef=SvRV(left);
1546 if (!SvROK(tmpRef) && SvTYPE(tmpRef) <= SVt_PVMG) {
1548 * Just to be extra cautious. Maybe in some
1549 * additional cases sv_setsv is safe, too.
1551 SV* newref = newSVsv(tmpRef);
1552 SvOBJECT_on(newref);
1553 SvSTASH(newref) = (HV*)SvREFCNT_inc(SvSTASH(tmpRef));
1559 if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg])
1560 && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) {
1561 SV* nullsv=sv_2mortal(newSViv(0));
1563 SV* lessp = amagic_call(left,nullsv,
1564 lt_amg,AMGf_noright);
1565 logic = SvTRUE(lessp);
1567 SV* lessp = amagic_call(left,nullsv,
1568 ncmp_amg,AMGf_noright);
1569 logic = (SvNV(lessp) < 0);
1572 if (off==subtr_amg) {
1583 if ((cv = cvp[off=subtr_amg])) {
1585 left = sv_2mortal(newSViv(0));
1590 case iter_amg: /* XXXX Eventually should do to_gv. */
1592 return NULL; /* Delegate operation to standard mechanisms. */
1600 return left; /* Delegate operation to standard mechanisms. */
1605 if (!cv) goto not_found;
1606 } else if (!(AMGf_noright & flags) && SvAMAGIC(right)
1607 && (stash = SvSTASH(SvRV(right)))
1608 && (mg = mg_find((SV*)stash, PERL_MAGIC_overload_table))
1609 && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr)
1610 ? (amtp = (AMT*)mg->mg_ptr)->table
1612 && (cv = cvp[off=method])) { /* Method for right
1615 } else if (((ocvp && oamtp->fallback > AMGfallNEVER
1616 && (cvp=ocvp) && (lr = -1))
1617 || (cvp && amtp->fallback > AMGfallNEVER && (lr=1)))
1618 && !(flags & AMGf_unary)) {
1619 /* We look for substitution for
1620 * comparison operations and
1622 if (method==concat_amg || method==concat_ass_amg
1623 || method==repeat_amg || method==repeat_ass_amg) {
1624 return NULL; /* Delegate operation to string conversion */
1634 postpr = 1; off=ncmp_amg; break;
1641 postpr = 1; off=scmp_amg; break;
1643 if (off != -1) cv = cvp[off];
1648 not_found: /* No method found, either report or croak */
1656 return left; /* Delegate operation to standard mechanisms. */
1659 if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */
1660 notfound = 1; lr = -1;
1661 } else if (cvp && (cv=cvp[nomethod_amg])) {
1662 notfound = 1; lr = 1;
1665 if (off==-1) off=method;
1666 msg = sv_2mortal(Perl_newSVpvf(aTHX_
1667 "Operation `%s': no method found,%sargument %s%s%s%s",
1668 AMG_id2name(method + assignshift),
1669 (flags & AMGf_unary ? " " : "\n\tleft "),
1671 "in overloaded package ":
1672 "has no overloaded magic",
1674 HvNAME(SvSTASH(SvRV(left))):
1677 ",\n\tright argument in overloaded package ":
1680 : ",\n\tright argument has no overloaded magic"),
1682 HvNAME(SvSTASH(SvRV(right))):
1684 if (amtp && amtp->fallback >= AMGfallYES) {
1685 DEBUG_o( Perl_deb(aTHX_ "%s", SvPVX(msg)) );
1687 Perl_croak(aTHX_ "%"SVf, msg);
1691 force_cpy = force_cpy || assign;
1696 DEBUG_o(Perl_deb(aTHX_
1697 "Overloaded operator `%s'%s%s%s:\n\tmethod%s found%s in package %s%s\n",
1699 method+assignshift==off? "" :
1701 method+assignshift==off? "" :
1702 AMG_id2name(method+assignshift),
1703 method+assignshift==off? "" : "')",
1704 flags & AMGf_unary? "" :
1705 lr==1 ? " for right argument": " for left argument",
1706 flags & AMGf_unary? " for argument" : "",
1707 stash ? HvNAME(stash) : "null",
1708 fl? ",\n\tassignment variant used": "") );
1711 /* Since we use shallow copy during assignment, we need
1712 * to dublicate the contents, probably calling user-supplied
1713 * version of copy operator
1715 /* We need to copy in following cases:
1716 * a) Assignment form was called.
1717 * assignshift==1, assign==T, method + 1 == off
1718 * b) Increment or decrement, called directly.
1719 * assignshift==0, assign==0, method + 0 == off
1720 * c) Increment or decrement, translated to assignment add/subtr.
1721 * assignshift==0, assign==T,
1723 * d) Increment or decrement, translated to nomethod.
1724 * assignshift==0, assign==0,
1726 * e) Assignment form translated to nomethod.
1727 * assignshift==1, assign==T, method + 1 != off
1730 /* off is method, method+assignshift, or a result of opcode substitution.
1731 * In the latter case assignshift==0, so only notfound case is important.
1733 if (( (method + assignshift == off)
1734 && (assign || (method == inc_amg) || (method == dec_amg)))
1741 bool oldcatch = CATCH_GET;
1744 Zero(&myop, 1, BINOP);
1745 myop.op_last = (OP *) &myop;
1746 myop.op_next = Nullop;
1747 myop.op_flags = OPf_WANT_SCALAR | OPf_STACKED;
1749 PUSHSTACKi(PERLSI_OVERLOAD);
1752 PL_op = (OP *) &myop;
1753 if (PERLDB_SUB && PL_curstash != PL_debstash)
1754 PL_op->op_private |= OPpENTERSUB_DB;
1758 EXTEND(SP, notfound + 5);
1759 PUSHs(lr>0? right: left);
1760 PUSHs(lr>0? left: right);
1761 PUSHs( lr > 0 ? &PL_sv_yes : ( assign ? &PL_sv_undef : &PL_sv_no ));
1763 PUSHs( sv_2mortal(newSVpv(AMG_id2name(method + assignshift),0)));
1768 if ((PL_op = Perl_pp_entersub(aTHX)))
1776 CATCH_SET(oldcatch);
1783 ans=SvIV(res)<=0; break;
1786 ans=SvIV(res)<0; break;
1789 ans=SvIV(res)>=0; break;
1792 ans=SvIV(res)>0; break;
1795 ans=SvIV(res)==0; break;
1798 ans=SvIV(res)!=0; break;
1801 SvSetSV(left,res); return left;
1803 ans=!SvTRUE(res); break;
1806 } else if (method==copy_amg) {
1808 Perl_croak(aTHX_ "Copy method did not return a reference");
1810 return SvREFCNT_inc(SvRV(res));
1818 =for apidoc is_gv_magical
1820 Returns C<TRUE> if given the name of a magical GV.
1822 Currently only useful internally when determining if a GV should be
1823 created even in rvalue contexts.
1825 C<flags> is not used at present but available for future extension to
1826 allow selecting particular classes of magical variable.
1828 Currently assumes that C<name> is NUL terminated (as well as len being valid).
1829 This assumption is met by all callers within the perl core, which all pass
1830 pointers returned by SvPV.
1835 Perl_is_gv_magical(pTHX_ char *name, STRLEN len, U32 flags)
1838 const char *name1 = name + 1;
1841 if (len == 3 && name1[1] == 'S' && name[2] == 'A')
1845 if (len == 8 && strEQ(name1, "VERLOAD"))
1849 if (len == 3 && name[1] == 'I' && name[2] == 'G')
1852 /* Using ${^...} variables is likely to be sufficiently rare that
1853 it seems sensible to avoid the space hit of also checking the
1855 case '\017': /* ${^OPEN} */
1856 if (strEQ(name1, "PEN"))
1859 case '\024': /* ${^TAINT} */
1860 if (strEQ(name1, "AINT"))
1863 case '\025': /* ${^UNICODE} */
1864 if (strEQ(name1, "NICODE"))
1867 case '\027': /* ${^WARNING_BITS} */
1868 if (strEQ(name1, "ARNING_BITS"))
1881 char *end = name + len;
1882 while (--end > name) {
1890 /* Because we're already assuming that name is NUL terminated
1891 below, we can treat an empty name as "\0" */
1918 case '\001': /* $^A */
1919 case '\003': /* $^C */
1920 case '\004': /* $^D */
1921 case '\005': /* $^E */
1922 case '\006': /* $^F */
1923 case '\010': /* $^H */
1924 case '\011': /* $^I, NOT \t in EBCDIC */
1925 case '\014': /* $^L */
1926 case '\016': /* $^N */
1927 case '\017': /* $^O */
1928 case '\020': /* $^P */
1929 case '\023': /* $^S */
1930 case '\024': /* $^T */
1931 case '\026': /* $^V */
1932 case '\027': /* $^W */