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gv.c
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gv.c
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/* gv.c
*
* Copyright (c) 1991-2000, 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.
*
*/
/*
* 'Mercy!' cried Gandalf. 'If the giving of information is to be the cure
* of your inquisitiveness, I shall spend all the rest of my days answering
* you. What more do you want to know?'
* 'The names of all the stars, and of all living things, and the whole
* history of Middle-earth and Over-heaven and of the Sundering Seas,'
* laughed Pippin.
*/
#include "EXTERN.h"
#define PERL_IN_GV_C
#include "perl.h"
GV *
Perl_gv_AVadd(pTHX_ register GV *gv)
{
if (!gv || SvTYPE((SV*)gv) != SVt_PVGV)
Perl_croak(aTHX_ "Bad symbol for array");
if (!GvAV(gv))
GvAV(gv) = newAV();
return gv;
}
GV *
Perl_gv_HVadd(pTHX_ register GV *gv)
{
if (!gv || SvTYPE((SV*)gv) != SVt_PVGV)
Perl_croak(aTHX_ "Bad symbol for hash");
if (!GvHV(gv))
GvHV(gv) = newHV();
return gv;
}
GV *
Perl_gv_IOadd(pTHX_ register GV *gv)
{
if (!gv || SvTYPE((SV*)gv) != SVt_PVGV)
Perl_croak(aTHX_ "Bad symbol for filehandle");
if (!GvIOp(gv))
GvIOp(gv) = newIO();
return gv;
}
GV *
Perl_gv_fetchfile(pTHX_ const char *name)
{
dTHR;
char smallbuf[256];
char *tmpbuf;
STRLEN tmplen;
GV *gv;
if (!PL_defstash)
return Nullgv;
tmplen = strlen(name) + 2;
if (tmplen < sizeof smallbuf)
tmpbuf = smallbuf;
else
New(603, tmpbuf, tmplen + 1, char);
tmpbuf[0] = '_';
tmpbuf[1] = '<';
strcpy(tmpbuf + 2, name);
gv = *(GV**)hv_fetch(PL_defstash, tmpbuf, tmplen, TRUE);
if (!isGV(gv)) {
gv_init(gv, PL_defstash, tmpbuf, tmplen, FALSE);
sv_setpv(GvSV(gv), name);
if (PERLDB_LINE)
hv_magic(GvHVn(gv_AVadd(gv)), Nullgv, 'L');
}
if (tmpbuf != smallbuf)
Safefree(tmpbuf);
return gv;
}
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;
sv_upgrade((SV*)gv, SVt_PVGV);
if (SvLEN(gv)) {
if (proto) {
SvPVX(gv) = NULL;
SvLEN(gv) = 0;
SvPOK_off(gv);
} else
Safefree(SvPVX(gv));
}
Newz(602, gp, 1, GP);
GvGP(gv) = gp_ref(gp);
GvSV(gv) = NEWSV(72,0);
GvLINE(gv) = CopLINE(PL_curcop);
GvFILE(gv) = CopFILE(PL_curcop) ? CopFILE(PL_curcop) : "";
GvCVGEN(gv) = 0;
GvEGV(gv) = gv;
sv_magic((SV*)gv, (SV*)gv, '*', Nullch, 0);
GvSTASH(gv) = (HV*)SvREFCNT_inc(stash);
GvNAME(gv) = savepvn(name, len);
GvNAMELEN(gv) = len;
if (multi || doproto) /* doproto means it _was_ mentioned */
GvMULTI_on(gv);
if (doproto) { /* Replicate part of newSUB here. */
SvIOK_off(gv);
ENTER;
/* XXX unsafe for threads if eval_owner isn't held */
start_subparse(0,0); /* Create CV in compcv. */
GvCV(gv) = PL_compcv;
LEAVE;
PL_sub_generation++;
CvGV(GvCV(gv)) = (GV*)SvREFCNT_inc(gv);
CvFILE(GvCV(gv)) = CopFILE(PL_curcop);
CvSTASH(GvCV(gv)) = PL_curstash;
#ifdef USE_THREADS
CvOWNER(GvCV(gv)) = 0;
if (!CvMUTEXP(GvCV(gv))) {
New(666, CvMUTEXP(GvCV(gv)), 1, perl_mutex);
MUTEX_INIT(CvMUTEXP(GvCV(gv)));
}
#endif /* USE_THREADS */
if (proto) {
sv_setpv((SV*)GvCV(gv), proto);
Safefree(proto);
}
}
}
STATIC void
S_gv_init_sv(pTHX_ GV *gv, I32 sv_type)
{
switch (sv_type) {
case SVt_PVIO:
(void)GvIOn(gv);
break;
case SVt_PVAV:
(void)GvAVn(gv);
break;
case SVt_PVHV:
(void)GvHVn(gv);
break;
}
}
/*
=for apidoc gv_fetchmeth
Returns the glob with the given C<name> and a defined subroutine or
C<NULL>. The glob lives in the given C<stash>, or in the stashes
accessible via @ISA and @UNIVERSAL.
The argument C<level> should be either 0 or -1. If C<level==0>, as a
side-effect creates a glob with the given C<name> in the given C<stash>
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.
This function grants C<"SUPER"> token as a postfix of the stash name. The
GV returned from C<gv_fetchmeth> may be a method cache entry, which is not
visible to Perl code. So when calling C<call_sv>, 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<GvCV> macro.
=cut
*/
GV *
Perl_gv_fetchmeth(pTHX_ HV *stash, const char *name, STRLEN len, I32 level)
{
AV* av;
GV* topgv;
GV* gv;
GV** gvp;
CV* cv;
if (!stash)
return 0;
if ((level > 100) || (level < -100))
Perl_croak(aTHX_ "Recursive inheritance detected while looking for method '%s' in package '%s'",
name, HvNAME(stash));
DEBUG_o( Perl_deb(aTHX_ "Looking for method %s in package %s\n",name,HvNAME(stash)) );
gvp = (GV**)hv_fetch(stash, name, len, (level >= 0));
if (!gvp)
topgv = Nullgv;
else {
topgv = *gvp;
if (SvTYPE(topgv) != SVt_PVGV)
gv_init(topgv, stash, name, len, TRUE);
if ((cv = GvCV(topgv))) {
/* If genuine method or valid cache entry, use it */
if (!GvCVGEN(topgv) || GvCVGEN(topgv) == PL_sub_generation)
return topgv;
/* Stale cached entry: junk it */
SvREFCNT_dec(cv);
GvCV(topgv) = cv = Nullcv;
GvCVGEN(topgv) = 0;
}
else if (GvCVGEN(topgv) == PL_sub_generation)
return 0; /* cache indicates sub doesn't exist */
}
gvp = (GV**)hv_fetch(stash, "ISA", 3, FALSE);
av = (gvp && (gv = *gvp) && gv != (GV*)&PL_sv_undef) ? GvAV(gv) : Nullav;
/* create and re-create @.*::SUPER::ISA on demand */
if (!av || !SvMAGIC(av)) {
char* packname = HvNAME(stash);
STRLEN packlen = strlen(packname);
if (packlen >= 7 && strEQ(packname + packlen - 7, "::SUPER")) {
HV* basestash;
packlen -= 7;
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));
if (SvTYPE(gv) != SVt_PVGV)
gv_init(gv, stash, "ISA", 3, TRUE);
SvREFCNT_dec(GvAV(gv));
GvAV(gv) = (AV*)SvREFCNT_inc(av);
}
}
}
if (av) {
SV** svp = AvARRAY(av);
/* NOTE: No support for tied ISA */
I32 items = AvFILLp(av) + 1;
while (items--) {
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));
continue;
}
gv = gv_fetchmeth(basestash, name, len,
(level >= 0) ? level + 1 : level - 1);
if (gv)
goto gotcha;
}
}
/* if at top level, try UNIVERSAL */
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)))
{
gotcha:
/*
* Cache method in topgv if:
* 1. topgv has no synonyms (else inheritance crosses wires)
* 2. method isn't a stub (else AUTOLOAD fails spectacularly)
*/
if (topgv &&
GvREFCNT(topgv) == 1 &&
(cv = GvCV(gv)) &&
(CvROOT(cv) || CvXSUB(cv)))
{
if ((cv = GvCV(topgv)))
SvREFCNT_dec(cv);
GvCV(topgv) = (CV*)SvREFCNT_inc(GvCV(gv));
GvCVGEN(topgv) = PL_sub_generation;
}
return gv;
}
else if (topgv && GvREFCNT(topgv) == 1) {
/* cache the fact that the method is not defined */
GvCVGEN(topgv) = PL_sub_generation;
}
}
}
return 0;
}
/*
=for apidoc gv_fetchmethod
See L<gv_fetchmethod_autoload>.
=cut
*/
GV *
Perl_gv_fetchmethod(pTHX_ HV *stash, const char *name)
{
return gv_fetchmethod_autoload(stash, name, TRUE);
}
/*
=for apidoc gv_fetchmethod_autoload
Returns the glob which contains the subroutine to call to invoke the method
on the C<stash>. In fact in the presence of autoloading this may be the
glob for "AUTOLOAD". In this case the corresponding variable $AUTOLOAD is
already setup.
The third parameter of C<gv_fetchmethod_autoload> 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.
Calling C<gv_fetchmethod> is equivalent to calling C<gv_fetchmethod_autoload>
with a non-zero C<autoload> 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.
These functions have the same side-effects and as C<gv_fetchmeth> with
C<level==0>. C<name> should be writable if contains C<':'> or C<'
''>. The warning against passing the GV returned by C<gv_fetchmeth> to
C<call_sv> apply equally to these functions.
=cut
*/
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;
else if (*nend == ':' && *(nend + 1) == ':')
nsplit = ++nend;
}
if (nsplit) {
const char *origname = name;
name = nsplit + 1;
if (*nsplit == ':')
--nsplit;
if ((nsplit - origname) == 5 && strnEQ(origname, "SUPER", 5)) {
/* ->SUPER::method should really be looked up in original stash */
SV *tmpstr = sv_2mortal(Perl_newSVpvf(aTHX_ "%s::SUPER",
CopSTASHPV(PL_curcop)));
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);
}
gv = gv_fetchmeth(stash, name, nend - name, 0);
if (!gv) {
if (strEQ(name,"import") || strEQ(name,"unimport"))
gv = (GV*)&PL_sv_yes;
else if (autoload)
gv = gv_autoload4(stash, name, nend - name, TRUE);
}
else if (autoload) {
CV* cv = GvCV(gv);
if (!CvROOT(cv) && !CvXSUB(cv)) {
GV* stubgv;
GV* autogv;
if (CvANON(cv))
stubgv = gv;
else {
stubgv = CvGV(cv);
if (GvCV(stubgv) != cv) /* orphaned import */
stubgv = gv;
}
autogv = gv_autoload4(GvSTASH(stubgv),
GvNAME(stubgv), GvNAMELEN(stubgv), TRUE);
if (autogv)
gv = autogv;
}
}
return gv;
}
GV*
Perl_gv_autoload4(pTHX_ HV *stash, const char *name, STRLEN len, I32 method)
{
dTHR;
static char autoload[] = "AUTOLOAD";
static STRLEN autolen = 8;
GV* gv;
CV* cv;
HV* varstash;
GV* vargv;
SV* varsv;
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))
return Nullgv;
/*
* Inheriting AUTOLOAD for non-methods works ... for now.
*/
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);
/*
* Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name.
* The subroutine's original name may not be "AUTOLOAD", so we don't
* use that, but for lack of anything better we will use the sub's
* original package to look up $AUTOLOAD.
*/
varstash = GvSTASH(CvGV(cv));
vargv = *(GV**)hv_fetch(varstash, autoload, autolen, TRUE);
ENTER;
#ifdef USE_THREADS
sv_lock((SV *)varstash);
#endif
if (!isGV(vargv))
gv_init(vargv, varstash, autoload, autolen, FALSE);
LEAVE;
varsv = GvSV(vargv);
#ifdef USE_THREADS
sv_lock(varsv);
#endif
sv_setpv(varsv, HvNAME(stash));
sv_catpvn(varsv, "::", 2);
sv_catpvn(varsv, name, len);
SvTAINTED_off(varsv);
return gv;
}
/*
=for apidoc gv_stashpv
Returns a pointer to the stash for a specified package. C<name> should
be a valid UTF-8 string. If C<create> is set then the package will be
created if it does not already exist. If C<create> is not set and the
package does not exist then NULL is returned.
=cut
*/
HV*
Perl_gv_stashpv(pTHX_ const char *name, I32 create)
{
return gv_stashpvn(name, strlen(name), create);
}
HV*
Perl_gv_stashpvn(pTHX_ const char *name, U32 namelen, I32 create)
{
char smallbuf[256];
char *tmpbuf;
HV *stash;
GV *tmpgv;
if (namelen + 3 < sizeof smallbuf)
tmpbuf = smallbuf;
else
New(606, tmpbuf, namelen + 3, char);
Copy(name,tmpbuf,namelen,char);
tmpbuf[namelen++] = ':';
tmpbuf[namelen++] = ':';
tmpbuf[namelen] = '\0';
tmpgv = gv_fetchpv(tmpbuf, create, SVt_PVHV);
if (tmpbuf != smallbuf)
Safefree(tmpbuf);
if (!tmpgv)
return 0;
if (!GvHV(tmpgv))
GvHV(tmpgv) = newHV();
stash = GvHV(tmpgv);
if (!HvNAME(stash))
HvNAME(stash) = savepv(name);
return stash;
}
/*
=for apidoc gv_stashsv
Returns a pointer to the stash for a specified package, which must be a
valid UTF-8 string. See C<gv_stashpv>.
=cut
*/
HV*
Perl_gv_stashsv(pTHX_ SV *sv, I32 create)
{
register char *ptr;
STRLEN len;
ptr = SvPV(sv,len);
return gv_stashpvn(ptr, len, 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;
if (*name == '*' && isALPHA(name[1])) /* accidental stringify on a GV? */
name++;
for (namend = name; *namend; namend++) {
if ((*namend == ':' && namend[1] == ':')
|| (*namend == '\'' && namend[1]))
{
if (!stash)
stash = PL_defstash;
if (!stash || !SvREFCNT(stash)) /* symbol table under destruction */
return Nullgv;
len = namend - name;
if (len > 0) {
char smallbuf[256];
char *tmpbuf;
if (len + 3 < sizeof smallbuf)
tmpbuf = smallbuf;
else
New(601, tmpbuf, len+3, char);
Copy(name, tmpbuf, len, char);
tmpbuf[len++] = ':';
tmpbuf[len++] = ':';
tmpbuf[len] = '\0';
gvp = (GV**)hv_fetch(stash,tmpbuf,len,add);
gv = gvp ? *gvp : Nullgv;
if (gv && gv != (GV*)&PL_sv_undef) {
if (SvTYPE(gv) != SVt_PVGV)
gv_init(gv, stash, tmpbuf, len, (add & GV_ADDMULTI));
else
GvMULTI_on(gv);
}
if (tmpbuf != smallbuf)
Safefree(tmpbuf);
if (!gv || gv == (GV*)&PL_sv_undef)
return Nullgv;
if (!(stash = GvHV(gv)))
stash = GvHV(gv) = newHV();
if (!HvNAME(stash))
HvNAME(stash) = savepvn(nambeg, namend - nambeg);
}
if (*namend == ':')
namend++;
namend++;
name = namend;
if (!*name)
return gv ? gv : (GV*)*hv_fetch(PL_defstash, "main::", 6, TRUE);
}
}
len = namend - name;
if (!len)
len = 1;
/* No stash in name, so see how we can default */
if (!stash) {
if (isIDFIRST_lazy(name)) {
bool global = FALSE;
if (isUPPER(*name)) {
if (*name == 'S' && (
strEQ(name, "SIG") ||
strEQ(name, "STDIN") ||
strEQ(name, "STDOUT") ||
strEQ(name, "STDERR")))
global = TRUE;
else if (*name == 'I' && strEQ(name, "INC"))
global = TRUE;
else if (*name == 'E' && strEQ(name, "ENV"))
global = TRUE;
else if (*name == 'A' && (
strEQ(name, "ARGV") ||
strEQ(name, "ARGVOUT")))
global = TRUE;
}
else if (*name == '_' && !name[1])
global = TRUE;
if (global)
stash = PL_defstash;
else if ((COP*)PL_curcop == &PL_compiling) {
stash = PL_curstash;
if (add && (PL_hints & HINT_STRICT_VARS) &&
sv_type != SVt_PVCV &&
sv_type != SVt_PVGV &&
sv_type != SVt_PVFM &&
sv_type != SVt_PVIO &&
!(len == 1 && sv_type == SVt_PV && strchr("ab",*name)) )
{
gvp = (GV**)hv_fetch(stash,name,len,0);
if (!gvp ||
*gvp == (GV*)&PL_sv_undef ||
SvTYPE(*gvp) != SVt_PVGV)
{
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)) )
{
Perl_warn(aTHX_ "Variable \"%c%s\" is not imported",
sv_type == SVt_PVAV ? '@' :
sv_type == SVt_PVHV ? '%' : '$',
name);
if (GvCVu(*gvp))
Perl_warn(aTHX_ "\t(Did you mean &%s instead?)\n", name);
stash = 0;
}
}
}
else
stash = CopSTASH(PL_curcop);
}
else
stash = PL_defstash;
}
/* By this point we should have a stash and a name */
if (!stash) {
if (add) {
qerror(Perl_mess(aTHX_
"Global symbol \"%s%s\" requires explicit package name",
(sv_type == SVt_PV ? "$"
: sv_type == SVt_PVAV ? "@"
: sv_type == SVt_PVHV ? "%"
: ""), name));
stash = PL_nullstash;
}
else
return Nullgv;
}
if (!SvREFCNT(stash)) /* symbol table under destruction */
return Nullgv;
gvp = (GV**)hv_fetch(stash,name,len,add);
if (!gvp || *gvp == (GV*)&PL_sv_undef)
return Nullgv;
gv = *gvp;
if (SvTYPE(gv) == SVt_PVGV) {
if (add) {
GvMULTI_on(gv);
gv_init_sv(gv, sv_type);
}
return gv;
} else if (add & GV_NOINIT) {
return gv;
}
/* Adding a new symbol */
if (add & GV_ADDWARN && ckWARN_d(WARN_INTERNAL))
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);
if (isLEXWARN_on && isALPHA(name[0]) && ! ckWARN(WARN_ONCE))
GvMULTI_on(gv) ;
/* set up magic where warranted */
switch (*name) {
case 'A':
if (strEQ(name, "ARGV")) {
IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START;
}
break;
case 'E':
if (strnEQ(name, "EXPORT", 6))
GvMULTI_on(gv);
break;
case 'I':
if (strEQ(name, "ISA")) {
AV* av = GvAVn(gv);
GvMULTI_on(gv);
sv_magic((SV*)av, (SV*)gv, 'I', Nullch, 0);
/* NOTE: No support for tied ISA */
if ((add & GV_ADDMULTI) && strEQ(nambeg,"AnyDBM_File::ISA")
&& AvFILLp(av) == -1)
{
char *pname;
av_push(av, newSVpvn(pname = "NDBM_File",9));
gv_stashpvn(pname, 9, TRUE);
av_push(av, newSVpvn(pname = "DB_File",7));
gv_stashpvn(pname, 7, TRUE);
av_push(av, newSVpvn(pname = "GDBM_File",9));
gv_stashpvn(pname, 9, TRUE);
av_push(av, newSVpvn(pname = "SDBM_File",9));
gv_stashpvn(pname, 9, TRUE);
av_push(av, newSVpvn(pname = "ODBM_File",9));
gv_stashpvn(pname, 9, TRUE);
}
}
break;
case 'O':
if (strEQ(name, "OVERLOAD")) {
HV* hv = GvHVn(gv);
GvMULTI_on(gv);
hv_magic(hv, Nullgv, 'A');
}
break;
case 'S':
if (strEQ(name, "SIG")) {
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*);
}
GvMULTI_on(gv);
hv = GvHVn(gv);
hv_magic(hv, Nullgv, 'S');
for (i = 1; PL_sig_name[i]; 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;
}
}
break;
case 'V':
if (strEQ(name, "VERSION"))
GvMULTI_on(gv);
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;
PL_sawampersand = TRUE;
goto ro_magicalize;
case ':':
if (len > 1)
break;
sv_setpv(GvSV(gv),PL_chopset);
goto magicalize;
case '?':
if (len > 1)
break;
#ifdef COMPLEX_STATUS
(void)SvUPGRADE(GvSV(gv), SVt_PVLV);
#endif
goto magicalize;
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;
case '-':
if (len > 1)
break;
else {
AV* av = GvAVn(gv);
sv_magic((SV*)av, Nullsv, 'D', Nullch, 0);
SvREADONLY_on(av);
}
goto magicalize;
case '#':
case '*':
if (ckWARN(WARN_DEPRECATED) && len == 1 && sv_type == SVt_PV)
Perl_warner(aTHX_ WARN_DEPRECATED, "Use of $%s is deprecated", name);
/* FALL THROUGH */
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 '\017': /* $^O */
case '\020': /* $^P */
case '\024': /* $^T */
if (len > 1)
break;
goto magicalize;
case '\023': /* $^S */
if (len > 1)
break;
goto ro_magicalize;
case '\027': /* $^W & $^WARNING_BITS */
if (len > 1 && strNE(name, "\027ARNING_BITS")
&& strNE(name, "\027IDE_SYSTEM_CALLS"))
break;
goto magicalize;
case '+':
if (len > 1)
break;
else {
AV* av = GvAVn(gv);
sv_magic((SV*)av, (SV*)av, 'D', Nullch, 0);
SvREADONLY_on(av);
}
/* FALL THROUGH */
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
ro_magicalize:
SvREADONLY_on(GvSV(gv));
magicalize:
sv_magic(GvSV(gv), (SV*)gv, 0, name, len);
break;
case '\014': /* $^L */
if (len > 1)
break;
sv_setpv(GvSV(gv),"\f");
PL_formfeed = GvSV(gv);
break;
case ';':
if (len > 1)
break;
sv_setpv(GvSV(gv),"\034");
break;
case ']':
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);
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) {
(void)SvOK_off(sv);
return;
}
sv_setpv(sv, prefix ? prefix : "");
sv_catpv(sv,HvNAME(hv));
sv_catpvn(sv,"::", 2);
sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv));
}
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);
if (!egv)
egv = gv;
gv_fullname3(sv, egv, prefix);
}
/* XXX compatibility with versions <= 5.003. */
void
Perl_gv_fullname(pTHX_ SV *sv, GV *gv)
{
gv_fullname3(sv, gv, sv == (SV*)gv ? "*" : "");
}
/* XXX compatibility with versions <= 5.003. */
void
Perl_gv_efullname(pTHX_ SV *sv, GV *gv)
{
gv_efullname3(sv, gv, sv == (SV*)gv ? "*" : "");
}
IO *
Perl_newIO(pTHX)
{
dTHR;
IO *io;
GV *iogv;
io = (IO*)NEWSV(0,0);
sv_upgrade((SV *)io,SVt_PVIO);