X-Git-Url: https://perl5.git.perl.org/perl5.git/blobdiff_plain/954c1994944eafa74aaac1bab94e820b6e447da9..407b02b18cd4aa4559559e2186ed579096fab094:/gv.c diff --git a/gv.c b/gv.c index 854a822..eb7b3ba 100644 --- a/gv.c +++ b/gv.c @@ -1,6 +1,6 @@ /* gv.c * - * Copyright (c) 1991-1999, Larry Wall + * Copyright (c) 1991-2001, Larry Wall * * You may distribute under the terms of either the GNU General Public * License or the Artistic License, as specified in the README file. @@ -45,15 +45,20 @@ Perl_gv_IOadd(pTHX_ register GV *gv) { if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) Perl_croak(aTHX_ "Bad symbol for filehandle"); - if (!GvIOp(gv)) + if (!GvIOp(gv)) { +#ifdef GV_UNIQUE_CHECK + if (GvUNIQUE(gv)) { + Perl_croak(aTHX_ "Bad symbol for filehandle (GV is unique)"); + } +#endif GvIOp(gv) = newIO(); + } return gv; } GV * Perl_gv_fetchfile(pTHX_ const char *name) { - dTHR; char smallbuf[256]; char *tmpbuf; STRLEN tmplen; @@ -67,6 +72,7 @@ Perl_gv_fetchfile(pTHX_ const char *name) tmpbuf = smallbuf; else New(603, tmpbuf, tmplen + 1, char); + /* This is where the debugger's %{"::_<$filename"} hash is created */ tmpbuf[0] = '_'; tmpbuf[1] = '<'; strcpy(tmpbuf + 2, name); @@ -75,7 +81,7 @@ Perl_gv_fetchfile(pTHX_ const char *name) gv_init(gv, PL_defstash, tmpbuf, tmplen, FALSE); sv_setpv(GvSV(gv), name); if (PERLDB_LINE) - hv_magic(GvHVn(gv_AVadd(gv)), gv, 'L'); + hv_magic(GvHVn(gv_AVadd(gv)), Nullgv, PERL_MAGIC_dbfile); } if (tmpbuf != smallbuf) Safefree(tmpbuf); @@ -85,7 +91,6 @@ Perl_gv_fetchfile(pTHX_ const char *name) void Perl_gv_init(pTHX_ GV *gv, HV *stash, const char *name, STRLEN len, int multi) { - dTHR; register GP *gp; bool doproto = SvTYPE(gv) > SVt_NULL; char *proto = (doproto && SvPOK(gv)) ? SvPVX(gv) : NULL; @@ -106,7 +111,7 @@ Perl_gv_init(pTHX_ GV *gv, HV *stash, const char *name, STRLEN len, int multi) GvFILE(gv) = CopFILE(PL_curcop) ? CopFILE(PL_curcop) : ""; GvCVGEN(gv) = 0; GvEGV(gv) = gv; - sv_magic((SV*)gv, (SV*)gv, '*', name, len); + sv_magic((SV*)gv, (SV*)gv, PERL_MAGIC_glob, Nullch, 0); GvSTASH(gv) = (HV*)SvREFCNT_inc(stash); GvNAME(gv) = savepvn(name, len); GvNAMELEN(gv) = len; @@ -121,16 +126,16 @@ Perl_gv_init(pTHX_ GV *gv, HV *stash, const char *name, STRLEN len, int multi) LEAVE; PL_sub_generation++; - CvGV(GvCV(gv)) = (GV*)SvREFCNT_inc(gv); - CvFILE(GvCV(gv)) = CopFILE(PL_curcop); + CvGV(GvCV(gv)) = gv; + CvFILE_set_from_cop(GvCV(gv), PL_curcop); CvSTASH(GvCV(gv)) = PL_curstash; -#ifdef USE_THREADS +#ifdef USE_5005THREADS CvOWNER(GvCV(gv)) = 0; if (!CvMUTEXP(GvCV(gv))) { New(666, CvMUTEXP(GvCV(gv)), 1, perl_mutex); MUTEX_INIT(CvMUTEXP(GvCV(gv))); } -#endif /* USE_THREADS */ +#endif /* USE_5005THREADS */ if (proto) { sv_setpv((SV*)GvCV(gv), proto); Safefree(proto); @@ -159,18 +164,18 @@ S_gv_init_sv(pTHX_ GV *gv, I32 sv_type) Returns the glob with the given C and a defined subroutine or C. The glob lives in the given C, or in the stashes -accessible via @ISA and @UNIVERSAL. +accessible via @ISA and UNIVERSAL::. The argument C should be either 0 or -1. If C, as a side-effect creates a glob with the given C in the given C which in the case of success contains an alias for the subroutine, and sets -up caching info for this glob. Similarly for all the searched stashes. +up caching info for this glob. Similarly for all the searched stashes. This function grants C<"SUPER"> token as a postfix of the stash name. The GV returned from C may be a method cache entry, which is not -visible to Perl code. So when calling C, you should not use +visible to Perl code. So when calling C, you should not use the GV directly; instead, you should use the method's CV, which can be -obtained from the GV with the C macro. +obtained from the GV with the C macro. =cut */ @@ -184,8 +189,13 @@ Perl_gv_fetchmeth(pTHX_ HV *stash, const char *name, STRLEN len, I32 level) GV** gvp; CV* cv; - if (!stash) - return 0; + /* UNIVERSAL methods should be callable without a stash */ + if (!stash) { + level = -1; /* probably appropriate */ + if(!(stash = gv_stashpvn("UNIVERSAL", 9, FALSE))) + return 0; + } + if ((level > 100) || (level < -100)) Perl_croak(aTHX_ "Recursive inheritance detected while looking for method '%s' in package '%s'", name, HvNAME(stash)); @@ -199,7 +209,7 @@ Perl_gv_fetchmeth(pTHX_ HV *stash, const char *name, STRLEN len, I32 level) topgv = *gvp; if (SvTYPE(topgv) != SVt_PVGV) gv_init(topgv, stash, name, len, TRUE); - if (cv = GvCV(topgv)) { + if ((cv = GvCV(topgv))) { /* If genuine method or valid cache entry, use it */ if (!GvCVGEN(topgv) || GvCVGEN(topgv) == PL_sub_generation) return topgv; @@ -227,7 +237,6 @@ Perl_gv_fetchmeth(pTHX_ HV *stash, const char *name, STRLEN len, I32 level) basestash = gv_stashpvn(packname, packlen, TRUE); gvp = (GV**)hv_fetch(basestash, "ISA", 3, FALSE); if (gvp && (gv = *gvp) != (GV*)&PL_sv_undef && (av = GvAV(gv))) { - dTHR; /* just for SvREFCNT_dec */ gvp = (GV**)hv_fetch(stash, "ISA", 3, TRUE); if (!gvp || !(gv = *gvp)) Perl_croak(aTHX_ "Cannot create %s::ISA", HvNAME(stash)); @@ -247,7 +256,6 @@ Perl_gv_fetchmeth(pTHX_ HV *stash, const char *name, STRLEN len, I32 level) SV* sv = *svp++; HV* basestash = gv_stashsv(sv, FALSE); if (!basestash) { - dTHR; /* just for ckWARN */ if (ckWARN(WARN_MISC)) Perl_warner(aTHX_ WARN_MISC, "Can't locate package %s for @%s::ISA", SvPVX(sv), HvNAME(stash)); @@ -265,9 +273,10 @@ Perl_gv_fetchmeth(pTHX_ HV *stash, const char *name, STRLEN len, I32 level) if (level == 0 || level == -1) { HV* lastchance; - if (lastchance = gv_stashpvn("UNIVERSAL", 9, FALSE)) { - if (gv = gv_fetchmeth(lastchance, name, len, - (level >= 0) ? level + 1 : level - 1)) { + if ((lastchance = gv_stashpvn("UNIVERSAL", 9, FALSE))) { + if ((gv = gv_fetchmeth(lastchance, name, len, + (level >= 0) ? level + 1 : level - 1))) + { gotcha: /* * Cache method in topgv if: @@ -279,7 +288,7 @@ Perl_gv_fetchmeth(pTHX_ HV *stash, const char *name, STRLEN len, I32 level) (cv = GvCV(gv)) && (CvROOT(cv) || CvXSUB(cv))) { - if (cv = GvCV(topgv)) + if ((cv = GvCV(topgv))) SvREFCNT_dec(cv); GvCV(topgv) = (CV*)SvREFCNT_inc(GvCV(gv)); GvCVGEN(topgv) = PL_sub_generation; @@ -299,7 +308,7 @@ Perl_gv_fetchmeth(pTHX_ HV *stash, const char *name, STRLEN len, I32 level) /* =for apidoc gv_fetchmethod -See L. =cut */ @@ -316,24 +325,24 @@ Perl_gv_fetchmethod(pTHX_ HV *stash, const char *name) Returns the glob which contains the subroutine to call to invoke the method on the C. In fact in the presence of autoloading this may be the glob for "AUTOLOAD". In this case the corresponding variable $AUTOLOAD is -already setup. +already setup. The third parameter of C determines whether AUTOLOAD lookup is performed if the given method is not present: non-zero -means yes, look for AUTOLOAD; zero means no, don't look for AUTOLOAD. +means yes, look for AUTOLOAD; zero means no, don't look for AUTOLOAD. Calling C is equivalent to calling C -with a non-zero C parameter. +with a non-zero C parameter. These functions grant C<"SUPER"> token as a prefix of the method name. Note that if you want to keep the returned glob for a long time, you need to check for it being "AUTOLOAD", since at the later time the call may load a different subroutine due to $AUTOLOAD changing its value. Use the glob -created via a side effect to do this. +created via a side effect to do this. These functions have the same side-effects and as C with C. C should be writable if contains C<':'> or C<' ''>. The warning against passing the GV returned by C to -C apply equally to these functions. +C apply equally to these functions. =cut */ @@ -341,11 +350,10 @@ C apply equally to these functions. GV * Perl_gv_fetchmethod_autoload(pTHX_ HV *stash, const char *name, I32 autoload) { - dTHR; register const char *nend; const char *nsplit = 0; GV* gv; - + for (nend = name; *nend; nend++) { if (*nend == '\'') nsplit = nend; @@ -361,17 +369,19 @@ Perl_gv_fetchmethod_autoload(pTHX_ HV *stash, const char *name, I32 autoload) /* ->SUPER::method should really be looked up in original stash */ SV *tmpstr = sv_2mortal(Perl_newSVpvf(aTHX_ "%s::SUPER", CopSTASHPV(PL_curcop))); + /* __PACKAGE__::SUPER stash should be autovivified */ stash = gv_stashpvn(SvPVX(tmpstr), SvCUR(tmpstr), TRUE); DEBUG_o( Perl_deb(aTHX_ "Treating %s as %s::%s\n", origname, HvNAME(stash), name) ); } else - stash = gv_stashpvn(origname, nsplit - origname, TRUE); + /* don't autovifify if ->NoSuchStash::method */ + stash = gv_stashpvn(origname, nsplit - origname, FALSE); } gv = gv_fetchmeth(stash, name, nend - name, 0); if (!gv) { - if (strEQ(name,"import")) + if (strEQ(name,"import") || strEQ(name,"unimport")) gv = (GV*)&PL_sv_yes; else if (autoload) gv = gv_autoload4(stash, name, nend - name, TRUE); @@ -402,30 +412,48 @@ Perl_gv_fetchmethod_autoload(pTHX_ HV *stash, const char *name, I32 autoload) GV* Perl_gv_autoload4(pTHX_ HV *stash, const char *name, STRLEN len, I32 method) { - dTHR; - static char autoload[] = "AUTOLOAD"; - static STRLEN autolen = 8; + char autoload[] = "AUTOLOAD"; + STRLEN autolen = sizeof(autoload)-1; GV* gv; CV* cv; HV* varstash; GV* vargv; SV* varsv; + if (!stash) + return Nullgv; /* UNIVERSAL::AUTOLOAD could cause trouble */ if (len == autolen && strnEQ(name, autoload, autolen)) return Nullgv; if (!(gv = gv_fetchmeth(stash, autoload, autolen, FALSE))) return Nullgv; cv = GvCV(gv); + if (!(CvROOT(cv) || CvXSUB(cv))) + return Nullgv; + /* * Inheriting AUTOLOAD for non-methods works ... for now. */ - if (ckWARN(WARN_DEPRECATED) && !method && + if (ckWARN(WARN_DEPRECATED) && !method && (GvCVGEN(gv) || GvSTASH(gv) != stash)) Perl_warner(aTHX_ WARN_DEPRECATED, "Use of inherited AUTOLOAD for non-method %s::%.*s() is deprecated", HvNAME(stash), (int)len, name); +#ifndef USE_5005THREADS + if (CvXSUB(cv)) { + /* rather than lookup/init $AUTOLOAD here + * only to have the XSUB do another lookup for $AUTOLOAD + * and split that value on the last '::', + * pass along the same data via some unused fields in the CV + */ + CvSTASH(cv) = stash; + SvPVX(cv) = (char *)name; /* cast to lose constness warning */ + SvCUR(cv) = len; + return gv; + } +#endif + /* * Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name. * The subroutine's original name may not be "AUTOLOAD", so we don't @@ -434,9 +462,18 @@ Perl_gv_autoload4(pTHX_ HV *stash, const char *name, STRLEN len, I32 method) */ varstash = GvSTASH(CvGV(cv)); vargv = *(GV**)hv_fetch(varstash, autoload, autolen, TRUE); + ENTER; + +#ifdef USE_5005THREADS + sv_lock((SV *)varstash); +#endif if (!isGV(vargv)) gv_init(vargv, varstash, autoload, autolen, FALSE); + LEAVE; varsv = GvSV(vargv); +#ifdef USE_5005THREADS + sv_lock(varsv); +#endif sv_setpv(varsv, HvNAME(stash)); sv_catpvn(varsv, "::", 2); sv_catpvn(varsv, name, len); @@ -444,13 +481,35 @@ Perl_gv_autoload4(pTHX_ HV *stash, const char *name, STRLEN len, I32 method) return gv; } +/* The "gv" parameter should be the glob known to Perl code as *! + * The scalar must already have been magicalized. + */ +STATIC void +S_require_errno(pTHX_ GV *gv) +{ + HV* stash = gv_stashpvn("Errno",5,FALSE); + + if (!stash || !(gv_fetchmethod(stash, "TIEHASH"))) { + dSP; + PUTBACK; + ENTER; + save_scalar(gv); /* keep the value of $! */ + require_pv("Errno.pm"); + LEAVE; + SPAGAIN; + stash = gv_stashpvn("Errno",5,FALSE); + if (!stash || !(gv_fetchmethod(stash, "TIEHASH"))) + Perl_croak(aTHX_ "Can't use %%! because Errno.pm is not available"); + } +} + /* =for apidoc gv_stashpv -Returns a pointer to the stash for a specified package. If C is -set then the package will be created if it does not already exist. If -C is not set and the package does not exist then NULL is -returned. +Returns a pointer to the stash for a specified package. C should +be a valid UTF-8 string. If C is set then the package will be +created if it does not already exist. If C is not set and the +package does not exist then NULL is returned. =cut */ @@ -493,8 +552,8 @@ Perl_gv_stashpvn(pTHX_ const char *name, U32 namelen, I32 create) /* =for apidoc gv_stashsv -Returns a pointer to the stash for a specified package. See -C. +Returns a pointer to the stash for a specified package, which must be a +valid UTF-8 string. See C. =cut */ @@ -512,14 +571,12 @@ Perl_gv_stashsv(pTHX_ SV *sv, I32 create) GV * Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 add, I32 sv_type) { - dTHR; register const char *name = nambeg; register GV *gv = 0; GV**gvp; I32 len; register const char *namend; HV *stash = 0; - U32 add_gvflags = 0; if (*name == '*' && isALPHA(name[1])) /* accidental stringify on a GV? */ name++; @@ -581,9 +638,7 @@ Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 add, I32 sv_type) /* No stash in name, so see how we can default */ if (!stash) { - if (isIDFIRST(*name) - || (IN_UTF8 && ((*name & 0xc0) == 0xc0) && isIDFIRST_utf8((U8*)name))) - { + if (isIDFIRST_lazy(name)) { bool global = FALSE; if (isUPPER(*name)) { @@ -602,7 +657,7 @@ Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 add, I32 sv_type) strEQ(name, "ARGVOUT"))) global = TRUE; } - else if (*name == '_' && !name[1]) + else if (*name == '_' && (!name[1] || strEQ(name,"__ANON__"))) global = TRUE; if (global) @@ -623,16 +678,16 @@ Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 add, I32 sv_type) { stash = 0; } - else if (sv_type == SVt_PV && !GvIMPORTED_SV(*gvp) || - sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp) || - sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp) ) + else if ((sv_type == SVt_PV && !GvIMPORTED_SV(*gvp)) || + (sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp)) || + (sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp)) ) { Perl_warn(aTHX_ "Variable \"%c%s\" is not imported", sv_type == SVt_PVAV ? '@' : sv_type == SVt_PVHV ? '%' : '$', name); if (GvCVu(*gvp)) - Perl_warn(aTHX_ "(Did you mean &%s instead?)\n", name); + Perl_warn(aTHX_ "\t(Did you mean &%s instead?)\n", name); stash = 0; } } @@ -654,8 +709,10 @@ Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 add, I32 sv_type) : sv_type == SVt_PVAV ? "@" : sv_type == SVt_PVHV ? "%" : ""), name)); + stash = PL_nullstash; } - return Nullgv; + else + return Nullgv; } if (!SvREFCNT(stash)) /* symbol table under destruction */ @@ -669,6 +726,8 @@ Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 add, I32 sv_type) if (add) { GvMULTI_on(gv); gv_init_sv(gv, sv_type); + if (*name=='!' && sv_type == SVt_PVHV && len==1) + require_errno(gv); } return gv; } else if (add & GV_NOINIT) { @@ -681,9 +740,9 @@ Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 add, I32 sv_type) Perl_warner(aTHX_ WARN_INTERNAL, "Had to create %s unexpectedly", nambeg); gv_init(gv, stash, name, len, add & GV_ADDMULTI); gv_init_sv(gv, sv_type); - GvFLAGS(gv) |= add_gvflags; - if (isLEXWARN_on && isALPHA(name[0]) && ! ckWARN(WARN_ONCE)) + if (isALPHA(name[0]) && ! (isLEXWARN_on ? ckWARN(WARN_ONCE) + : (PL_dowarn & G_WARN_ON ) ) ) GvMULTI_on(gv) ; /* set up magic where warranted */ @@ -701,7 +760,7 @@ Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 add, I32 sv_type) if (strEQ(name, "ISA")) { AV* av = GvAVn(gv); GvMULTI_on(gv); - sv_magic((SV*)av, (SV*)gv, 'I', Nullch, 0); + sv_magic((SV*)av, (SV*)gv, PERL_MAGIC_isa, Nullch, 0); /* NOTE: No support for tied ISA */ if ((add & GV_ADDMULTI) && strEQ(nambeg,"AnyDBM_File::ISA") && AvFILLp(av) == -1) @@ -724,7 +783,7 @@ Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 add, I32 sv_type) if (strEQ(name, "OVERLOAD")) { HV* hv = GvHVn(gv); GvMULTI_on(gv); - hv_magic(hv, gv, 'A'); + hv_magic(hv, Nullgv, PERL_MAGIC_overload); } break; case 'S': @@ -732,20 +791,21 @@ Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 add, I32 sv_type) HV *hv; I32 i; if (!PL_psig_ptr) { - int sig_num[] = { SIG_NUM }; - New(73, PL_psig_ptr, sizeof(sig_num)/sizeof(*sig_num), SV*); - New(73, PL_psig_name, sizeof(sig_num)/sizeof(*sig_num), SV*); + Newz(73, PL_psig_ptr, SIG_SIZE, SV*); + Newz(73, PL_psig_name, SIG_SIZE, SV*); + Newz(73, PL_psig_pend, SIG_SIZE, int); } GvMULTI_on(gv); hv = GvHVn(gv); - hv_magic(hv, gv, 'S'); - for (i = 1; PL_sig_name[i]; i++) { + hv_magic(hv, Nullgv, PERL_MAGIC_sig); + for (i = 1; i < SIG_SIZE; i++) { SV ** init; init = hv_fetch(hv, PL_sig_name[i], strlen(PL_sig_name[i]), 1); if (init) sv_setsv(*init, &PL_sv_undef); PL_psig_ptr[i] = 0; PL_psig_name[i] = 0; + PL_psig_pend[i] = 0; } } break; @@ -755,20 +815,16 @@ Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 add, I32 sv_type) break; case '&': - if (len > 1) - break; - PL_sawampersand = TRUE; - goto ro_magicalize; - case '`': - if (len > 1) - break; - PL_sawampersand = TRUE; - goto ro_magicalize; - case '\'': - if (len > 1) - break; + if ( + len > 1 || + sv_type == SVt_PVAV || + sv_type == SVt_PVHV || + sv_type == SVt_PVCV || + sv_type == SVt_PVFM || + sv_type == SVt_PVIO + ) { break; } PL_sawampersand = TRUE; goto ro_magicalize; @@ -789,25 +845,26 @@ Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 add, I32 sv_type) case '!': if (len > 1) break; - if (sv_type > SVt_PV && PL_curcop != &PL_compiling) { - HV* stash = gv_stashpvn("Errno",5,FALSE); - if (!stash || !(gv_fetchmethod(stash, "TIEHASH"))) { - dSP; - PUTBACK; - require_pv("Errno.pm"); - SPAGAIN; - stash = gv_stashpvn("Errno",5,FALSE); - if (!stash || !(gv_fetchmethod(stash, "TIEHASH"))) - Perl_croak(aTHX_ "Can't use %%! because Errno.pm is not available"); - } - } - goto magicalize; + + /* If %! has been used, automatically load Errno.pm. + The require will itself set errno, so in order to + preserve its value we have to set up the magic + now (rather than going to magicalize) + */ + + sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, len); + + if (sv_type == SVt_PVHV) + require_errno(gv); + + break; case '-': if (len > 1) break; else { AV* av = GvAVn(gv); - sv_magic((SV*)av, Nullsv, 'D', Nullch, 0); + sv_magic((SV*)av, Nullsv, PERL_MAGIC_regdata, Nullch, 0); + SvREADONLY_on(av); } goto magicalize; case '#': @@ -828,26 +885,45 @@ Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 add, I32 sv_type) case ',': case '\\': case '/': + case '\001': /* $^A */ + case '\003': /* $^C */ + case '\004': /* $^D */ + case '\006': /* $^F */ + case '\010': /* $^H */ + case '\011': /* $^I, NOT \t in EBCDIC */ + case '\016': /* $^N */ + case '\020': /* $^P */ + if (len > 1) + break; + goto magicalize; case '|': - case '\001': - case '\003': - case '\004': - case '\005': - case '\006': - case '\010': - case '\011': /* NOT \t in EBCDIC */ - case '\017': - case '\020': - case '\024': if (len > 1) break; + sv_setiv(GvSV(gv), (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0); + goto magicalize; + case '\005': /* $^E && $^ENCODING */ + if (len > 1 && strNE(name, "\005NCODING")) + break; goto magicalize; - case '\023': + + case '\017': /* $^O & $^OPEN */ + if (len > 1 && strNE(name, "\017PEN")) + break; + goto magicalize; + case '\023': /* $^S */ if (len > 1) break; goto ro_magicalize; - case '\027': /* $^W & $^Warnings */ - if (len > 1 && strNE(name, "\027arnings")) + case '\024': /* $^T, ${^TAINT} */ + if (len == 1) + goto magicalize; + else if (strEQ(name, "\024AINT")) + goto ro_magicalize; + else + break; + case '\027': /* $^W & $^WARNING_BITS */ + if (len > 1 && strNE(name, "\027ARNING_BITS") + && strNE(name, "\027IDE_SYSTEM_CALLS")) break; goto magicalize; @@ -856,7 +932,8 @@ Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 add, I32 sv_type) break; else { AV* av = GvAVn(gv); - sv_magic((SV*)av, (SV*)av, 'D', Nullch, 0); + sv_magic((SV*)av, (SV*)av, PERL_MAGIC_regdata, Nullch, 0); + SvREADONLY_on(av); } /* FALL THROUGH */ case '1': @@ -868,13 +945,24 @@ Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 add, I32 sv_type) case '7': case '8': case '9': + /* ensures variable is only digits */ + /* ${"1foo"} fails this test (and is thus writeable) */ + /* added by japhy, but borrowed from is_gv_magical */ + + if (len > 1) { + const char *end = name + len; + while (--end > name) { + if (!isDIGIT(*end)) return gv; + } + } + ro_magicalize: SvREADONLY_on(GvSV(gv)); magicalize: - sv_magic(GvSV(gv), (SV*)gv, 0, name, len); + sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, len); break; - case '\014': + case '\014': /* $^L */ if (len > 1) break; sv_setpv(GvSV(gv),"\f"); @@ -889,22 +977,52 @@ Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 add, I32 sv_type) if (len == 1) { SV *sv = GvSV(gv); (void)SvUPGRADE(sv, SVt_PVNV); + Perl_sv_setpvf(aTHX_ sv, +#if defined(PERL_SUBVERSION) && (PERL_SUBVERSION > 0) + "%8.6" +#else + "%5.3" +#endif + NVff, + SvNVX(PL_patchlevel)); SvNVX(sv) = SvNVX(PL_patchlevel); SvNOK_on(sv); - (void)SvPV_nolen(sv); SvREADONLY_on(sv); } break; + case '\026': /* $^V */ + if (len == 1) { + SV *sv = GvSV(gv); + GvSV(gv) = SvREFCNT_inc(PL_patchlevel); + SvREFCNT_dec(sv); + } + break; } return gv; } void +Perl_gv_fullname4(pTHX_ SV *sv, GV *gv, const char *prefix, bool keepmain) +{ + HV *hv = GvSTASH(gv); + if (!hv) { + (void)SvOK_off(sv); + return; + } + sv_setpv(sv, prefix ? prefix : ""); + if (keepmain || strNE(HvNAME(hv), "main")) { + sv_catpv(sv,HvNAME(hv)); + sv_catpvn(sv,"::", 2); + } + sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv)); +} + +void Perl_gv_fullname3(pTHX_ SV *sv, GV *gv, const char *prefix) { HV *hv = GvSTASH(gv); if (!hv) { - SvOK_off(sv); + (void)SvOK_off(sv); return; } sv_setpv(sv, prefix ? prefix : ""); @@ -914,6 +1032,15 @@ Perl_gv_fullname3(pTHX_ SV *sv, GV *gv, const char *prefix) } void +Perl_gv_efullname4(pTHX_ SV *sv, GV *gv, const char *prefix, bool keepmain) +{ + GV *egv = GvEGV(gv); + if (!egv) + egv = gv; + gv_fullname4(sv, egv, prefix, keepmain); +} + +void Perl_gv_efullname3(pTHX_ SV *sv, GV *gv, const char *prefix) { GV *egv = GvEGV(gv); @@ -939,7 +1066,6 @@ Perl_gv_efullname(pTHX_ SV *sv, GV *gv) IO * Perl_newIO(pTHX) { - dTHR; IO *io; GV *iogv; @@ -958,7 +1084,6 @@ Perl_newIO(pTHX) void Perl_gv_check(pTHX_ HV *stash) { - dTHR; register HE *entry; register I32 i; register GV *gv; @@ -969,7 +1094,7 @@ Perl_gv_check(pTHX_ HV *stash) for (i = 0; i <= (I32) HvMAX(stash); i++) { for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) { if (HeKEY(entry)[HeKLEN(entry)-1] == ':' && - (gv = (GV*)HeVAL(entry)) && (hv = GvHV(gv)) && HvNAME(hv)) + (gv = (GV*)HeVAL(entry)) && (hv = GvHV(gv))) { if (hv != PL_defstash && hv != stash) gv_check(hv); /* nested package */ @@ -984,7 +1109,12 @@ Perl_gv_check(pTHX_ HV *stash) * module, don't bother warning */ if (file && PERL_FILE_IS_ABSOLUTE(file) - && (instr(file, "/lib/") || instr(file, ".pm"))) +#ifdef MACOS_TRADITIONAL + && (instr(file, ":lib:") +#else + && (instr(file, "/lib/") +#endif + || instr(file, ".pm"))) { continue; } @@ -1035,9 +1165,7 @@ Perl_gp_ref(pTHX_ GP *gp) void Perl_gp_free(pTHX_ GV *gv) { - dTHR; GP* gp; - CV* cv; if (!gv || !(gp = GvGP(gv))) return; @@ -1076,7 +1204,7 @@ Perl_gp_free(pTHX_ GV *gv) AV *GvAVn(gv) register GV *gv; { - if (GvGP(gv)->gp_av) + if (GvGP(gv)->gp_av) return GvGP(gv)->gp_av; else return GvGP(gv_AVadd(gv))->gp_av; @@ -1092,140 +1220,98 @@ register GV *gv; } #endif /* Microport 2.4 hack */ +int +Perl_magic_freeovrld(pTHX_ SV *sv, MAGIC *mg) +{ + AMT *amtp = (AMT*)mg->mg_ptr; + if (amtp && AMT_AMAGIC(amtp)) { + int i; + for (i = 1; i < NofAMmeth; i++) { + CV *cv = amtp->table[i]; + if (cv != Nullcv) { + SvREFCNT_dec((SV *) cv); + amtp->table[i] = Nullcv; + } + } + } + return 0; +} + /* Updates and caches the CV's */ bool Perl_Gv_AMupdate(pTHX_ HV *stash) { - dTHR; - GV** gvp; - HV* hv; GV* gv; CV* cv; - MAGIC* mg=mg_find((SV*)stash,'c'); + MAGIC* mg=mg_find((SV*)stash, PERL_MAGIC_overload_table); AMT *amtp = (mg) ? (AMT*)mg->mg_ptr: (AMT *) NULL; AMT amt; - STRLEN n_a; if (mg && amtp->was_ok_am == PL_amagic_generation && amtp->was_ok_sub == PL_sub_generation) - return AMT_AMAGIC(amtp); - if (amtp && AMT_AMAGIC(amtp)) { /* Have table. */ - int i; - for (i=1; itable[i]) { - SvREFCNT_dec(amtp->table[i]); - } - } - } - sv_unmagic((SV*)stash, 'c'); + return AMT_OVERLOADED(amtp); + sv_unmagic((SV*)stash, PERL_MAGIC_overload_table); DEBUG_o( Perl_deb(aTHX_ "Recalcing overload magic in package %s\n",HvNAME(stash)) ); + Zero(&amt,1,AMT); amt.was_ok_am = PL_amagic_generation; amt.was_ok_sub = PL_sub_generation; amt.fallback = AMGfallNO; amt.flags = 0; -#ifdef OVERLOAD_VIA_HASH - gvp=(GV**)hv_fetch(stash,"OVERLOAD",8,FALSE); /* A shortcut */ - if (gvp && ((gv = *gvp) != (GV*)&PL_sv_undef && (hv = GvHV(gv)))) { - int filled=0; - int i; - char *cp; - SV* sv; - SV** svp; - - /* Work with "fallback" key, which we assume to be first in PL_AMG_names */ - - if (( cp = (char *)PL_AMG_names[0] ) && - (svp = (SV**)hv_fetch(hv,cp,strlen(cp),FALSE)) && (sv = *svp)) { - if (SvTRUE(sv)) amt.fallback=AMGfallYES; - else if (SvOK(sv)) amt.fallback=AMGfallNEVER; - } - for (i = 1; i < NofAMmeth; i++) { - cv = 0; - cp = (char *)PL_AMG_names[i]; - - svp = (SV**)hv_fetch(hv, cp, strlen(cp), FALSE); - if (svp && ((sv = *svp) != &PL_sv_undef)) { - switch (SvTYPE(sv)) { - default: - if (!SvROK(sv)) { - if (!SvOK(sv)) break; - gv = gv_fetchmethod(stash, SvPV(sv, n_a)); - if (gv) cv = GvCV(gv); - break; - } - cv = (CV*)SvRV(sv); - if (SvTYPE(cv) == SVt_PVCV) - break; - /* FALL THROUGH */ - case SVt_PVHV: - case SVt_PVAV: - Perl_croak(aTHX_ "Not a subroutine reference in overload table"); - return FALSE; - case SVt_PVCV: - cv = (CV*)sv; - break; - case SVt_PVGV: - if (!(cv = GvCVu((GV*)sv))) - cv = sv_2cv(sv, &stash, &gv, FALSE); - break; - } - if (cv) filled=1; - else { - Perl_croak(aTHX_ "Method for operation %s not found in package %.256s during blessing\n", - cp,HvNAME(stash)); - return FALSE; - } - } -#else { - int filled = 0; - int i; - const char *cp; + int filled = 0, have_ovl = 0; + int i, lim = 1; SV* sv = NULL; - SV** svp; /* Work with "fallback" key, which we assume to be first in PL_AMG_names */ - if ( cp = PL_AMG_names[0] ) { - /* Try to find via inheritance. */ - gv = gv_fetchmeth(stash, "()", 2, -1); /* A cookie: "()". */ - if (gv) sv = GvSV(gv); - - if (!gv) goto no_table; - else if (SvTRUE(sv)) amt.fallback=AMGfallYES; - else if (SvOK(sv)) amt.fallback=AMGfallNEVER; - } + /* Try to find via inheritance. */ + gv = gv_fetchmeth(stash, PL_AMG_names[0], 2, -1); + if (gv) + sv = GvSV(gv); + + if (!gv) + lim = DESTROY_amg; /* Skip overloading entries. */ + else if (SvTRUE(sv)) + amt.fallback=AMGfallYES; + else if (SvOK(sv)) + amt.fallback=AMGfallNEVER; + + for (i = 1; i < lim; i++) + amt.table[i] = Nullcv; + for (; i < NofAMmeth; i++) { + char *cooky = (char*)PL_AMG_names[i]; + /* Human-readable form, for debugging: */ + char *cp = (i >= DESTROY_amg ? cooky : AMG_id2name(i)); + STRLEN l = strlen(cooky); - for (i = 1; i < NofAMmeth; i++) { - SV *cookie = sv_2mortal(Perl_newSVpvf(aTHX_ "(%s", cp = PL_AMG_names[i])); DEBUG_o( Perl_deb(aTHX_ "Checking overloading of `%s' in package `%.256s'\n", cp, HvNAME(stash)) ); /* don't fill the cache while looking up! */ - gv = gv_fetchmeth(stash, SvPVX(cookie), SvCUR(cookie), -1); + gv = gv_fetchmeth(stash, cooky, l, -1); cv = 0; - if(gv && (cv = GvCV(gv))) { + if (gv && (cv = GvCV(gv))) { if (GvNAMELEN(CvGV(cv)) == 3 && strEQ(GvNAME(CvGV(cv)), "nil") && strEQ(HvNAME(GvSTASH(CvGV(cv))), "overload")) { /* GvSV contains the name of the method. */ - GV *ngv; + GV *ngv = Nullgv; - DEBUG_o( Perl_deb(aTHX_ "Resolving method `%.256s' for overloaded `%s' in package `%.256s'\n", - SvPV(GvSV(gv), n_a), cp, HvNAME(stash)) ); - if (!SvPOK(GvSV(gv)) + DEBUG_o( Perl_deb(aTHX_ "Resolving method `%.256s' for overloaded `%s' in package `%.256s'\n", + SvPV_nolen(GvSV(gv)), cp, HvNAME(stash)) ); + if (!SvPOK(GvSV(gv)) || !(ngv = gv_fetchmethod_autoload(stash, SvPVX(GvSV(gv)), FALSE))) { /* Can be an import stub (created by `can'). */ if (GvCVGEN(gv)) { - Perl_croak(aTHX_ "Stub found while resolving method `%.256s' overloading `%s' in package `%.256s'", + Perl_croak(aTHX_ "Stub found while resolving method `%.256s' overloading `%s' in package `%.256s'", (SvPOK(GvSV(gv)) ? SvPVX(GvSV(gv)) : "???" ), cp, HvNAME(stash)); } else - Perl_croak(aTHX_ "Can't resolve method `%.256s' overloading `%s' in package `%.256s'", + Perl_croak(aTHX_ "Can't resolve method `%.256s' overloading `%s' in package `%.256s'", (SvPOK(GvSV(gv)) ? SvPVX(GvSV(gv)) : "???" ), cp, HvNAME(stash)); } @@ -1235,43 +1321,80 @@ Perl_Gv_AMupdate(pTHX_ HV *stash) cp, HvNAME(stash), HvNAME(GvSTASH(CvGV(cv))), GvNAME(CvGV(cv))) ); filled = 1; + if (i < DESTROY_amg) + have_ovl = 1; } -#endif amt.table[i]=(CV*)SvREFCNT_inc(cv); } if (filled) { AMT_AMAGIC_on(&amt); - sv_magic((SV*)stash, 0, 'c', (char*)&amt, sizeof(AMT)); - return TRUE; + if (have_ovl) + AMT_OVERLOADED_on(&amt); + sv_magic((SV*)stash, 0, PERL_MAGIC_overload_table, + (char*)&amt, sizeof(AMT)); + return have_ovl; } } /* Here we have no table: */ - no_table: + /* no_table: */ AMT_AMAGIC_off(&amt); - sv_magic((SV*)stash, 0, 'c', (char*)&amt, sizeof(AMTS)); + sv_magic((SV*)stash, 0, PERL_MAGIC_overload_table, + (char*)&amt, sizeof(AMTS)); return FALSE; } + +CV* +Perl_gv_handler(pTHX_ HV *stash, I32 id) +{ + MAGIC *mg; + AMT *amtp; + + if (!stash) + return Nullcv; + mg = mg_find((SV*)stash, PERL_MAGIC_overload_table); + if (!mg) { + do_update: + Gv_AMupdate(stash); + mg = mg_find((SV*)stash, PERL_MAGIC_overload_table); + } + amtp = (AMT*)mg->mg_ptr; + if ( amtp->was_ok_am != PL_amagic_generation + || amtp->was_ok_sub != PL_sub_generation ) + goto do_update; + if (AMT_AMAGIC(amtp)) + return amtp->table[id]; + return Nullcv; +} + + SV* Perl_amagic_call(pTHX_ SV *left, SV *right, int method, int flags) { - dTHR; - MAGIC *mg; - CV *cv; + MAGIC *mg; + CV *cv=NULL; CV **cvp=NULL, **ocvp=NULL; - AMT *amtp, *oamtp; - int fl=0, off, off1, lr=0, assign=AMGf_assign & flags, notfound=0; + AMT *amtp=NULL, *oamtp=NULL; + int off=0, off1, lr=0, assign=AMGf_assign & flags, notfound=0; int postpr = 0, force_cpy = 0, assignshift = assign ? 1 : 0; - HV* stash; +#ifdef DEBUGGING + int fl=0; +#endif + HV* stash=NULL; if (!(AMGf_noleft & flags) && SvAMAGIC(left) - && (mg = mg_find((SV*)(stash=SvSTASH(SvRV(left))),'c')) - && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) + && (stash = SvSTASH(SvRV(left))) + && (mg = mg_find((SV*)stash, PERL_MAGIC_overload_table)) + && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) ? (oamtp = amtp = (AMT*)mg->mg_ptr)->table : (CV **) NULL)) - && ((cv = cvp[off=method+assignshift]) + && ((cv = cvp[off=method+assignshift]) || (assign && amtp->fallback > AMGfallNEVER && /* fallback to * usual method */ - (fl = 1, cv = cvp[off=method])))) { + ( +#ifdef DEBUGGING + fl = 1, +#endif + cv = cvp[off=method])))) { lr = -1; /* Call method for left argument */ } else { if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) { @@ -1304,7 +1427,7 @@ Perl_amagic_call(pTHX_ SV *left, SV *right, int method, int flags) (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg])); break; case not_amg: - (void)((cv = cvp[off=bool__amg]) + (void)((cv = cvp[off=bool__amg]) || (cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg])); postpr = 1; @@ -1329,7 +1452,7 @@ Perl_amagic_call(pTHX_ SV *left, SV *right, int method, int flags) } break; case abs_amg: - if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg]) + if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg]) && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) { SV* nullsv=sv_2mortal(newSViv(0)); if (off1==lt_amg) { @@ -1353,35 +1476,40 @@ Perl_amagic_call(pTHX_ SV *left, SV *right, int method, int flags) } break; case neg_amg: - if (cv = cvp[off=subtr_amg]) { + if ((cv = cvp[off=subtr_amg])) { right = left; left = sv_2mortal(newSViv(0)); lr = 1; } break; + case int_amg: case iter_amg: /* XXXX Eventually should do to_gv. */ + /* FAIL safe */ + return NULL; /* Delegate operation to standard mechanisms. */ + break; case to_sv_amg: case to_av_amg: case to_hv_amg: case to_gv_amg: case to_cv_amg: /* FAIL safe */ - return NULL; /* Delegate operation to standard mechanisms. */ + return left; /* Delegate operation to standard mechanisms. */ break; default: goto not_found; } if (!cv) goto not_found; } else if (!(AMGf_noright & flags) && SvAMAGIC(right) - && (mg = mg_find((SV*)(stash=SvSTASH(SvRV(right))),'c')) - && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) + && (stash = SvSTASH(SvRV(right))) + && (mg = mg_find((SV*)stash, PERL_MAGIC_overload_table)) + && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) ? (amtp = (AMT*)mg->mg_ptr)->table : (CV **) NULL)) && (cv = cvp[off=method])) { /* Method for right * argument found */ lr=1; - } else if (((ocvp && oamtp->fallback > AMGfallNEVER - && (cvp=ocvp) && (lr = -1)) + } else if (((ocvp && oamtp->fallback > AMGfallNEVER + && (cvp=ocvp) && (lr = -1)) || (cvp && amtp->fallback > AMGfallNEVER && (lr=1))) && !(flags & AMGf_unary)) { /* We look for substitution for @@ -1414,6 +1542,16 @@ Perl_amagic_call(pTHX_ SV *left, SV *right, int method, int flags) } } else { not_found: /* No method found, either report or croak */ + switch (method) { + case to_sv_amg: + case to_av_amg: + case to_hv_amg: + case to_gv_amg: + case to_cv_amg: + /* FAIL safe */ + return left; /* Delegate operation to standard mechanisms. */ + break; + } if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */ notfound = 1; lr = -1; } else if (cvp && (cv=cvp[nomethod_amg])) { @@ -1421,22 +1559,22 @@ Perl_amagic_call(pTHX_ SV *left, SV *right, int method, int flags) } else { SV *msg; if (off==-1) off=method; - msg = sv_2mortal(Perl_newSVpvf(aTHX_ + msg = sv_2mortal(Perl_newSVpvf(aTHX_ "Operation `%s': no method found,%sargument %s%s%s%s", - PL_AMG_names[method + assignshift], + AMG_id2name(method + assignshift), (flags & AMGf_unary ? " " : "\n\tleft "), - SvAMAGIC(left)? + SvAMAGIC(left)? "in overloaded package ": "has no overloaded magic", - SvAMAGIC(left)? + SvAMAGIC(left)? HvNAME(SvSTASH(SvRV(left))): "", - SvAMAGIC(right)? + SvAMAGIC(right)? ",\n\tright argument in overloaded package ": - (flags & AMGf_unary + (flags & AMGf_unary ? "" : ",\n\tright argument has no overloaded magic"), - SvAMAGIC(right)? + SvAMAGIC(right)? HvNAME(SvSTASH(SvRV(right))): "")); if (amtp && amtp->fallback >= AMGfallYES) { @@ -1449,21 +1587,23 @@ Perl_amagic_call(pTHX_ SV *left, SV *right, int method, int flags) force_cpy = force_cpy || assign; } } +#ifdef DEBUGGING if (!notfound) { - DEBUG_o( Perl_deb(aTHX_ - "Overloaded operator `%s'%s%s%s:\n\tmethod%s found%s in package %s%s\n", - PL_AMG_names[off], - method+assignshift==off? "" : - " (initially `", - method+assignshift==off? "" : - PL_AMG_names[method+assignshift], - method+assignshift==off? "" : "')", - flags & AMGf_unary? "" : - lr==1 ? " for right argument": " for left argument", - flags & AMGf_unary? " for argument" : "", - HvNAME(stash), - fl? ",\n\tassignment variant used": "") ); + DEBUG_o(Perl_deb(aTHX_ + "Overloaded operator `%s'%s%s%s:\n\tmethod%s found%s in package %s%s\n", + AMG_id2name(off), + method+assignshift==off? "" : + " (initially `", + method+assignshift==off? "" : + AMG_id2name(method+assignshift), + method+assignshift==off? "" : "')", + flags & AMGf_unary? "" : + lr==1 ? " for right argument": " for left argument", + flags & AMGf_unary? " for argument" : "", + stash ? HvNAME(stash) : "null", + fl? ",\n\tassignment variant used": "") ); } +#endif /* Since we use shallow copy during assignment, we need * to dublicate the contents, probably calling user-supplied * version of copy operator @@ -1474,10 +1614,10 @@ Perl_amagic_call(pTHX_ SV *left, SV *right, int method, int flags) * b) Increment or decrement, called directly. * assignshift==0, assign==0, method + 0 == off * c) Increment or decrement, translated to assignment add/subtr. - * assignshift==0, assign==T, + * assignshift==0, assign==T, * force_cpy == T * d) Increment or decrement, translated to nomethod. - * assignshift==0, assign==0, + * assignshift==0, assign==0, * force_cpy == T * e) Assignment form translated to nomethod. * assignshift==1, assign==T, method + 1 != off @@ -1516,12 +1656,12 @@ Perl_amagic_call(pTHX_ SV *left, SV *right, int method, int flags) PUSHs(lr>0? left: right); PUSHs( lr > 0 ? &PL_sv_yes : ( assign ? &PL_sv_undef : &PL_sv_no )); if (notfound) { - PUSHs( sv_2mortal(newSVpv((char *)PL_AMG_names[method + assignshift],0))); + PUSHs( sv_2mortal(newSVpv(AMG_id2name(method + assignshift),0))); } PUSHs((SV*)cv); PUTBACK; - if (PL_op = Perl_pp_entersub(aTHX)) + if ((PL_op = Perl_pp_entersub(aTHX))) CALLRUNOPS(aTHX); LEAVE; SPAGAIN; @@ -1532,7 +1672,7 @@ Perl_amagic_call(pTHX_ SV *left, SV *right, int method, int flags) CATCH_SET(oldcatch); if (postpr) { - int ans; + int ans=0; switch (method) { case le_amg: case sle_amg: @@ -1569,3 +1709,120 @@ Perl_amagic_call(pTHX_ SV *left, SV *right, int method, int flags) } } } + +/* +=for apidoc is_gv_magical + +Returns C if given the name of a magical GV. + +Currently only useful internally when determining if a GV should be +created even in rvalue contexts. + +C is not used at present but available for future extension to +allow selecting particular classes of magical variable. + +=cut +*/ +bool +Perl_is_gv_magical(pTHX_ char *name, STRLEN len, U32 flags) +{ + if (!len) + return FALSE; + + switch (*name) { + case 'I': + if (len == 3 && strEQ(name, "ISA")) + goto yes; + break; + case 'O': + if (len == 8 && strEQ(name, "OVERLOAD")) + goto yes; + break; + case 'S': + if (len == 3 && strEQ(name, "SIG")) + goto yes; + break; + case '\017': /* $^O & $^OPEN */ + if (len == 1 + || (len == 4 && strEQ(name, "\027PEN"))) + { + goto yes; + } + break; + case '\027': /* $^W & $^WARNING_BITS */ + if (len == 1 + || (len == 12 && strEQ(name, "\027ARNING_BITS")) + || (len == 17 && strEQ(name, "\027IDE_SYSTEM_CALLS"))) + { + goto yes; + } + break; + + case '&': + case '`': + case '\'': + case ':': + case '?': + case '!': + case '-': + case '#': + case '*': + case '[': + case '^': + case '~': + case '=': + case '%': + case '.': + case '(': + case ')': + case '<': + case '>': + case ',': + case '\\': + case '/': + case '|': + case '+': + case ';': + case ']': + case '\001': /* $^A */ + case '\003': /* $^C */ + case '\004': /* $^D */ + case '\005': /* $^E */ + case '\006': /* $^F */ + case '\010': /* $^H */ + case '\011': /* $^I, NOT \t in EBCDIC */ + case '\014': /* $^L */ + case '\016': /* $^N */ + case '\020': /* $^P */ + case '\023': /* $^S */ + case '\026': /* $^V */ + if (len == 1) + goto yes; + break; + case '\024': /* $^T, ${^TAINT} */ + if (len == 1 || strEQ(name, "\024AINT")) + goto yes; + break; + case '1': + case '2': + case '3': + case '4': + case '5': + case '6': + case '7': + case '8': + case '9': + if (len > 1) { + char *end = name + len; + while (--end > name) { + if (!isDIGIT(*end)) + return FALSE; + } + } + yes: + return TRUE; + default: + break; + } + return FALSE; +}