/* gv.c
*
- * Copyright (c) 1991-1994, Larry Wall
+ * 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.
*/
#include "EXTERN.h"
+#define PERL_IN_GV_C
#include "perl.h"
-extern char rcsid[];
-
GV *
-gv_AVadd(gv)
-register GV *gv;
+Perl_gv_AVadd(pTHX_ register GV *gv)
{
if (!gv || SvTYPE((SV*)gv) != SVt_PVGV)
- croak("Bad symbol for array");
+ Perl_croak(aTHX_ "Bad symbol for array");
if (!GvAV(gv))
GvAV(gv) = newAV();
return gv;
}
GV *
-gv_HVadd(gv)
-register GV *gv;
+Perl_gv_HVadd(pTHX_ register GV *gv)
{
if (!gv || SvTYPE((SV*)gv) != SVt_PVGV)
- croak("Bad symbol for hash");
+ Perl_croak(aTHX_ "Bad symbol for hash");
if (!GvHV(gv))
GvHV(gv) = newHV();
return gv;
}
GV *
-gv_IOadd(gv)
-register GV *gv;
+Perl_gv_IOadd(pTHX_ register GV *gv)
{
if (!gv || SvTYPE((SV*)gv) != SVt_PVGV)
- croak("Bad symbol for filehandle");
+ Perl_croak(aTHX_ "Bad symbol for filehandle");
if (!GvIOp(gv))
GvIOp(gv) = newIO();
return gv;
}
GV *
-gv_fetchfile(name)
-char *name;
+Perl_gv_fetchfile(pTHX_ const char *name)
{
- char tmpbuf[1200];
+ dTHR;
+ char smallbuf[256];
+ char *tmpbuf;
+ STRLEN tmplen;
GV *gv;
- sprintf(tmpbuf,"::_<%s", name);
- gv = gv_fetchpv(tmpbuf, TRUE, SVt_PVGV);
- sv_setpv(GvSV(gv), name);
- if (*name == '/' && (instr(name,"/lib/") || instr(name,".pm")))
- SvMULTI_on(gv);
- if (perldb)
- hv_magic(GvHVn(gv_AVadd(gv)), gv, 'L');
+ 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)), gv, 'L');
+ }
+ if (tmpbuf != smallbuf)
+ Safefree(tmpbuf);
return gv;
}
void
-gv_init(gv, stash, name, len, multi)
-GV *gv;
-HV *stash;
-char *name;
-STRLEN len;
-int multi;
+Perl_gv_init(pTHX_ GV *gv, HV *stash, const char *name, STRLEN len, int multi)
{
+ dTHR;
register GP *gp;
-
- sv_upgrade(gv, SVt_PVGV);
- if (SvLEN(gv))
- Safefree(SvPVX(gv));
- Newz(602,gp, 1, 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);
- GvREFCNT(gv) = 1;
GvSV(gv) = NEWSV(72,0);
- GvLINE(gv) = curcop->cop_line;
- GvFILEGV(gv) = curcop->cop_filegv;
+ 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, '*', name, len);
- GvSTASH(gv) = stash;
+ sv_magic((SV*)gv, (SV*)gv, '*', Nullch, 0);
+ GvSTASH(gv) = (HV*)SvREFCNT_inc(stash);
GvNAME(gv) = savepvn(name, len);
GvNAMELEN(gv) = len;
- if (multi)
- SvMULTI_on(gv);
+ 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
-gv_init_sv(gv, sv_type)
-GV* gv;
-I32 sv_type;
+STATIC void
+S_gv_init_sv(pTHX_ GV *gv, I32 sv_type)
{
switch (sv_type) {
case SVt_PVIO:
}
}
+/*
+=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 *
-gv_fetchmeth(stash, name, len, level)
-HV* stash;
-char* name;
-STRLEN len;
-I32 level;
+Perl_gv_fetchmeth(pTHX_ HV *stash, const char *name, STRLEN len, I32 level)
{
AV* av;
GV* topgv;
GV* gv;
GV** gvp;
- HV* lastchance;
CV* cv;
if (!stash)
return 0;
- if (level > 100)
- croak("Recursive inheritance detected");
-
- gvp = (GV**)hv_fetch(stash, name, len, TRUE);
-
- DEBUG_o( deb("Looking for method %s in package %s\n",name,HvNAME(stash)) );
- topgv = *gvp;
- if (SvTYPE(topgv) != SVt_PVGV)
- gv_init(topgv, stash, name, len, TRUE);
-
- if (cv=GvCV(topgv)) {
- if (GvCVGEN(topgv) >= sub_generation)
- return topgv; /* valid cached inheritance */
- if (!GvCVGEN(topgv)) { /* not an inheritance cache */
- return topgv;
- }
- else {
- /* stale cached entry, just junk it */
- GvCV(topgv) = cv = 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 cv is still set, we have to free it if we find something to cache */
- gvp = (GV**)hv_fetch(stash,"ISA",3,FALSE);
- if (gvp && (gv = *gvp) != (GV*)&sv_undef && (av = GvAV(gv))) {
+ if (av) {
SV** svp = AvARRAY(av);
- I32 items = AvFILL(av) + 1;
+ /* NOTE: No support for tied ISA */
+ I32 items = AvFILLp(av) + 1;
while (items--) {
SV* sv = *svp++;
HV* basestash = gv_stashsv(sv, FALSE);
if (!basestash) {
- if (dowarn)
- warn("Can't locate package %s for @%s::ISA",
+ 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 + 1);
- if (gv) {
- if (cv) { /* junk old undef */
- assert(SvREFCNT(topgv) > 1);
- SvREFCNT_dec(topgv);
- SvREFCNT_dec(cv);
- }
- GvCV(topgv) = GvCV(gv); /* cache the CV */
- GvCVGEN(topgv) = sub_generation; /* valid for now */
- return gv;
- }
+ gv = gv_fetchmeth(basestash, name, len,
+ (level >= 0) ? level + 1 : level - 1);
+ if (gv)
+ goto gotcha;
}
}
- if (!level) {
- if (lastchance = gv_stashpv("UNIVERSAL", FALSE)) {
- if (gv = gv_fetchmeth(lastchance, name, len, level + 1)) {
- if (cv) { /* junk old undef */
- assert(SvREFCNT(topgv) > 1);
- SvREFCNT_dec(topgv);
- SvREFCNT_dec(cv);
+ /* 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;
}
- GvCV(topgv) = GvCV(gv); /* cache the CV */
- GvCVGEN(topgv) = sub_generation; /* valid for now */
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 *
-gv_fetchmethod(stash, name)
-HV* stash;
-char* name;
+Perl_gv_fetchmethod(pTHX_ HV *stash, const char *name)
{
- register char *nend;
- char *nsplit = 0;
+ 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 == ':' || *nend == '\'')
+ if (*nend == '\'')
nsplit = nend;
+ else if (*nend == ':' && *(nend + 1) == ':')
+ nsplit = ++nend;
}
if (nsplit) {
- char ch;
- char *origname = name;
+ const char *origname = name;
name = nsplit + 1;
- ch = *nsplit;
if (*nsplit == ':')
--nsplit;
- *nsplit = '\0';
- if (strEQ(origname,"SUPER")) {
- /* Degenerate case ->SUPER::method should really lookup in original stash */
- SV *tmpstr = sv_2mortal(newSVpv(HvNAME(curcop->cop_stash),0));
- sv_catpvn(tmpstr, "::SUPER", 7);
- stash = gv_stashpv(SvPV(tmpstr,na),TRUE);
- *nsplit = ch;
- DEBUG_o( deb("Treating %s as %s::%s\n",origname,HvNAME(stash),name) );
- } else {
- stash = gv_stashpv(origname,TRUE);
- *nsplit = ch;
+ 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) );
}
- }
- gv = gv_fetchmeth(stash, name, nend - name, 0);
-
- if (!gv) {
- /* Failed obvious case - look for SUPER as last element of stash's name */
- char *packname = HvNAME(stash);
- STRLEN len = strlen(packname);
- if (len >= 7 && strEQ(packname+len-7,"::SUPER")) {
- /* Now look for @.*::SUPER::ISA */
- GV** gvp = (GV**)hv_fetch(stash,"ISA",3,FALSE);
- if (!gvp || (gv = *gvp) == (GV*)&sv_undef || !GvAV(gv)) {
- /* No @ISA in package ending in ::SUPER - drop suffix
- and see if there is an @ISA there
- */
- HV *basestash;
- char ch = packname[len-7];
- AV *av;
- packname[len-7] = '\0';
- basestash = gv_stashpv(packname, TRUE);
- packname[len-7] = ch;
- gvp = (GV**)hv_fetch(basestash,"ISA",3,FALSE);
- if (gvp && (gv = *gvp) != (GV*)&sv_undef && (av = GvAV(gv))) {
- /* Okay found @ISA after dropping the SUPER, alias it */
- SV *tmpstr = sv_2mortal(newSVpv(HvNAME(stash),0));
- sv_catpvn(tmpstr, "::ISA", 5);
- gv = gv_fetchpv(SvPV(tmpstr,na),TRUE,SVt_PVGV);
- if (gv) {
- GvAV(gv) = (AV*)SvREFCNT_inc(av);
- /* ... and re-try lookup */
- gv = gv_fetchmeth(stash, name, nend - name, 0);
- } else {
- croak("Cannot create %s::ISA",HvNAME(stash));
- }
- }
- }
- }
+ else
+ stash = gv_stashpvn(origname, nsplit - origname, TRUE);
}
+ gv = gv_fetchmeth(stash, name, nend - name, 0);
if (!gv) {
- CV* cv;
-
if (strEQ(name,"import") || strEQ(name,"unimport"))
- gv = &sv_yes;
- else if (strNE(name, "AUTOLOAD")) {
- gv = gv_fetchmeth(stash, "AUTOLOAD", 8, 0);
- if (gv && (cv = GvCV(gv))) { /* One more chance... */
- SV *tmpstr = sv_2mortal(newSVpv(HvNAME(stash),0));
- sv_catpvn(tmpstr,"::", 2);
- sv_catpvn(tmpstr, name, nend - name);
- sv_setsv(GvSV(CvGV(cv)), tmpstr);
+ 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*
-gv_stashpv(name,create)
-char *name;
-I32 create;
+Perl_gv_stashpv(pTHX_ const char *name, I32 create)
{
- char tmpbuf[1234];
+ 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;
- /* Use strncpy to avoid bug in VMS sprintf */
- /* sprintf(tmpbuf,"%.*s::",1200,name); */
- strncpy(tmpbuf, name, 1200);
- tmpbuf[1200] = '\0'; /* just in case . . . */
- strcat(tmpbuf, "::");
- tmpgv = gv_fetchpv(tmpbuf,create, SVt_PVHV);
+
+ 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))
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*
-gv_stashsv(sv,create)
-SV *sv;
-I32 create;
+Perl_gv_stashsv(pTHX_ SV *sv, I32 create)
{
- return gv_stashpv(SvPV(sv,na), create);
+ register char *ptr;
+ STRLEN len;
+ ptr = SvPV(sv,len);
+ return gv_stashpvn(ptr, len, create);
}
GV *
-gv_fetchpv(nambeg,add,sv_type)
-char *nambeg;
-I32 add;
-I32 sv_type;
+Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 add, I32 sv_type)
{
- register char *name = nambeg;
+ dTHR;
+ register const char *name = nambeg;
register GV *gv = 0;
GV**gvp;
I32 len;
- register char *namend;
+ register const char *namend;
HV *stash = 0;
- bool global = FALSE;
- char *tmpbuf;
+
+ if (*name == '*' && isALPHA(name[1])) /* accidental stringify on a GV? */
+ name++;
for (namend = name; *namend; namend++) {
- if ((*namend == '\'' && namend[1]) ||
- (*namend == ':' && namend[1] == ':'))
+ if ((*namend == ':' && namend[1] == ':')
+ || (*namend == '\'' && namend[1]))
{
if (!stash)
- stash = defstash;
- if (!SvREFCNT(stash)) /* symbol table under destruction */
+ stash = PL_defstash;
+ if (!stash || !SvREFCNT(stash)) /* symbol table under destruction */
return Nullgv;
len = namend - name;
if (len > 0) {
- New(601, tmpbuf, len+3, char);
+ 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);
- Safefree(tmpbuf);
- if (!gvp || *gvp == (GV*)&sv_undef)
- return Nullgv;
- gv = *gvp;
-
- if (SvTYPE(gv) == SVt_PVGV)
- SvMULTI_on(gv);
- else if (!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;
- else
- gv_init(gv, stash, nambeg, namend - nambeg, (add & 2));
if (!(stash = GvHV(gv)))
stash = GvHV(gv) = newHV();
namend++;
name = namend;
if (!*name)
- return gv ? gv : *hv_fetch(defstash, "main::", 6, TRUE);
+ return gv ? gv : (GV*)*hv_fetch(PL_defstash, "main::", 6, TRUE);
}
}
len = namend - name;
/* No stash in name, so see how we can default */
if (!stash) {
- if (isIDFIRST(*name)) {
+ if (isIDFIRST_lazy(name)) {
+ bool global = FALSE;
+
if (isUPPER(*name)) {
- if (*name > 'I') {
- if (*name == 'S' && (
- strEQ(name, "SIG") ||
- strEQ(name, "STDIN") ||
- strEQ(name, "STDOUT") ||
- strEQ(name, "STDERR") ))
- global = TRUE;
- }
- else if (*name > 'E') {
- if (*name == 'I' && strEQ(name, "INC"))
- global = TRUE;
- }
- else if (*name > 'A') {
- if (*name == 'E' && strEQ(name, "ENV"))
- global = TRUE;
- }
+ 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") ))
+ strEQ(name, "ARGVOUT")))
global = TRUE;
}
else if (*name == '_' && !name[1])
global = TRUE;
+
if (global)
- stash = defstash;
- else if ((COP*)curcop == &compiling) {
- stash = curstash;
- if (add && (hints & HINT_STRICT_VARS) &&
+ 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)
+ 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*)&sv_undef ||
- SvTYPE(*gvp) != SVt_PVGV ||
- !(GvFLAGS(*gvp) & GVf_IMPORTED))
+ *gvp == (GV*)&PL_sv_undef ||
+ SvTYPE(*gvp) != SVt_PVGV)
+ {
stash = 0;
- else if (sv_type == SVt_PVAV && !GvAV(*gvp) ||
- sv_type == SVt_PVHV && !GvHV(*gvp) ||
- sv_type == SVt_PV &&
- (!GvSV(*gvp) ||
- (!SvTYPE(GvSV(*gvp)) &&
- SvREFCNT(GvSV(*gvp)) == 1) ))
+ }
+ else if ((sv_type == SVt_PV && !GvIMPORTED_SV(*gvp)) ||
+ (sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp)) ||
+ (sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp)) )
{
- warn("Variable \"%c%s\" is not exported",
+ Perl_warn(aTHX_ "Variable \"%c%s\" is not imported",
sv_type == SVt_PVAV ? '@' :
sv_type == SVt_PVHV ? '%' : '$',
name);
- if (GvCV(*gvp))
- warn("(Did you mean &%s instead?)\n", name);
+ if (GvCVu(*gvp))
+ Perl_warn(aTHX_ "\t(Did you mean &%s instead?)\n", name);
stash = 0;
}
}
}
else
- stash = curcop->cop_stash;
+ stash = CopSTASH(PL_curcop);
}
else
- stash = defstash;
+ stash = PL_defstash;
}
/* By this point we should have a stash and a name */
if (!stash) {
if (add) {
- warn("Global symbol \"%s\" requires explicit package name", name);
- ++error_count;
- stash = curstash ? curstash : defstash; /* avoid core dumps */
+ 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;
return Nullgv;
gvp = (GV**)hv_fetch(stash,name,len,add);
- if (!gvp || *gvp == (GV*)&sv_undef)
+ if (!gvp || *gvp == (GV*)&PL_sv_undef)
return Nullgv;
gv = *gvp;
if (SvTYPE(gv) == SVt_PVGV) {
if (add) {
- SvMULTI_on(gv);
+ GvMULTI_on(gv);
gv_init_sv(gv, sv_type);
}
return gv;
+ } else if (add & GV_NOINIT) {
+ return gv;
}
/* Adding a new symbol */
- if (add & 4)
- warn("Had to create %s unexpectedly", nambeg);
- gv_init(gv, stash, name, len, add & 2);
+ 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':
IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START;
}
break;
-
- case 'a':
- case 'b':
- if (len == 1)
- SvMULTI_on(gv);
- break;
case 'E':
if (strnEQ(name, "EXPORT", 6))
- SvMULTI_on(gv);
+ GvMULTI_on(gv);
break;
case 'I':
if (strEQ(name, "ISA")) {
AV* av = GvAVn(gv);
- SvMULTI_on(gv);
+ GvMULTI_on(gv);
sv_magic((SV*)av, (SV*)gv, 'I', Nullch, 0);
- if (add & 2 && strEQ(nambeg,"AnyDBM_File::ISA") && AvFILL(av) == -1)
+ /* NOTE: No support for tied ISA */
+ if ((add & GV_ADDMULTI) && strEQ(nambeg,"AnyDBM_File::ISA")
+ && AvFILLp(av) == -1)
{
char *pname;
- av_push(av, newSVpv(pname = "NDBM_File",0));
- gv_stashpv(pname, TRUE);
- av_push(av, newSVpv(pname = "DB_File",0));
- gv_stashpv(pname, TRUE);
- av_push(av, newSVpv(pname = "GDBM_File",0));
- gv_stashpv(pname, TRUE);
- av_push(av, newSVpv(pname = "SDBM_File",0));
- gv_stashpv(pname, TRUE);
- av_push(av, newSVpv(pname = "ODBM_File",0));
- gv_stashpv(pname, TRUE);
+ 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;
-#ifdef OVERLOAD
case 'O':
if (strEQ(name, "OVERLOAD")) {
HV* hv = GvHVn(gv);
- SvMULTI_on(gv);
- sv_magic((SV*)hv, (SV*)gv, 'A', 0, 0);
+ GvMULTI_on(gv);
+ hv_magic(hv, gv, 'A');
}
break;
-#endif /* OVERLOAD */
case 'S':
if (strEQ(name, "SIG")) {
HV *hv;
- siggv = gv;
- SvMULTI_on(siggv);
- hv = GvHVn(siggv);
- hv_magic(hv, siggv, 'S');
-
- /* initialize signal stack */
- signalstack = newAV();
- AvREAL_off(signalstack);
- av_extend(signalstack, 30);
- av_fill(signalstack, 0);
+ 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, gv, '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;
- ampergv = gv;
- sawampersand = TRUE;
+ PL_sawampersand = TRUE;
goto ro_magicalize;
case '`':
if (len > 1)
break;
- leftgv = gv;
- sawampersand = TRUE;
+ PL_sawampersand = TRUE;
goto ro_magicalize;
case '\'':
if (len > 1)
break;
- rightgv = gv;
- sawampersand = TRUE;
+ PL_sawampersand = TRUE;
goto ro_magicalize;
case ':':
if (len > 1)
break;
- sv_setpv(GvSV(gv),chopset);
+ 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 (dowarn && len == 1 && sv_type == SVt_PV)
- warn("Use of $%s is deprecated", name);
+ 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 '\001':
- case '\004':
- case '\006':
- case '\010':
- case '\t':
- case '\020':
- case '\024':
- case '\027':
+ 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':
sv_magic(GvSV(gv), (SV*)gv, 0, name, len);
break;
- case '\014':
+ case '\014': /* $^L */
if (len > 1)
break;
sv_setpv(GvSV(gv),"\f");
- formfeed = GvSV(gv);
+ PL_formfeed = GvSV(gv);
break;
case ';':
if (len > 1)
break;
case ']':
if (len == 1) {
- SV *sv;
- sv = GvSV(gv);
- sv_upgrade(sv, SVt_PVNV);
- sv_setpv(sv, patchlevel);
+ SV *sv = GvSV(gv);
+ (void)SvUPGRADE(sv, SVt_PVNV);
+ SvNVX(sv) = SvNVX(PL_patchlevel);
+ SvNOK_on(sv);
+ (void)SvPV_nolen(sv);
+ SvREADONLY_on(sv);
+ }
+ break;
+ case '\026': /* $^V */
+ if (len == 1) {
+ SV *sv = GvSV(gv);
+ GvSV(gv) = SvREFCNT_inc(PL_patchlevel);
+ SvREFCNT_dec(sv);
}
break;
}
}
void
-gv_fullname(sv,gv)
-SV *sv;
-GV *gv;
+Perl_gv_fullname4(pTHX_ SV *sv, GV *gv, const char *prefix, bool keepmain)
{
HV *hv = GvSTASH(gv);
+ if (!hv) {
+ (void)SvOK_off(sv);
+ return;
+ }
+ sv_setpv(sv, prefix ? prefix : "");
+ if (keepmain || strNE(HvNAME(hv), "main")) {
+ sv_catpv(sv,HvNAME(hv));
+ sv_catpvn(sv,"::", 2);
+ }
+ sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv));
+}
- if (!hv)
+void
+Perl_gv_fullname3(pTHX_ SV *sv, GV *gv, const char *prefix)
+{
+ HV *hv = GvSTASH(gv);
+ if (!hv) {
+ (void)SvOK_off(sv);
return;
- sv_setpv(sv, sv == (SV*)gv ? "*" : "");
+ }
+ sv_setpv(sv, prefix ? prefix : "");
sv_catpv(sv,HvNAME(hv));
sv_catpvn(sv,"::", 2);
sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv));
}
void
-gv_efullname(sv,gv)
-SV *sv;
-GV *gv;
+Perl_gv_efullname4(pTHX_ SV *sv, GV *gv, const char *prefix, bool keepmain)
{
- GV* egv = GvEGV(gv);
- HV *hv;
-
+ GV *egv = GvEGV(gv);
if (!egv)
egv = gv;
- hv = GvSTASH(egv);
- if (!hv)
- return;
+ gv_fullname4(sv, egv, prefix, keepmain);
+}
- sv_setpv(sv, sv == (SV*)gv ? "*" : "");
- sv_catpv(sv,HvNAME(hv));
- sv_catpvn(sv,"::", 2);
- sv_catpvn(sv,GvNAME(egv),GvNAMELEN(egv));
+void
+Perl_gv_efullname3(pTHX_ SV *sv, GV *gv, const char *prefix)
+{
+ GV *egv = GvEGV(gv);
+ if (!egv)
+ egv = gv;
+ gv_fullname3(sv, egv, prefix);
+}
+
+/* XXX compatibility with versions <= 5.003. */
+void
+Perl_gv_fullname(pTHX_ SV *sv, GV *gv)
+{
+ gv_fullname3(sv, gv, sv == (SV*)gv ? "*" : "");
+}
+
+/* XXX compatibility with versions <= 5.003. */
+void
+Perl_gv_efullname(pTHX_ SV *sv, GV *gv)
+{
+ gv_efullname3(sv, gv, sv == (SV*)gv ? "*" : "");
}
IO *
-newIO()
+Perl_newIO(pTHX)
{
+ dTHR;
IO *io;
GV *iogv;
sv_upgrade((SV *)io,SVt_PVIO);
SvREFCNT(io) = 1;
SvOBJECT_on(io);
- iogv = gv_fetchpv("FileHandle::", TRUE, SVt_PVIO);
+ iogv = gv_fetchpv("FileHandle::", FALSE, SVt_PVHV);
+ /* unless exists($main::{FileHandle}) and defined(%main::FileHandle::) */
+ if (!(iogv && GvHV(iogv) && HvARRAY(GvHV(iogv))))
+ iogv = gv_fetchpv("IO::Handle::", TRUE, SVt_PVHV);
SvSTASH(io) = (HV*)SvREFCNT_inc(GvHV(iogv));
return io;
}
void
-gv_check(stash)
-HV* stash;
+Perl_gv_check(pTHX_ HV *stash)
{
+ dTHR;
register HE *entry;
register I32 i;
register GV *gv;
HV *hv;
- GV *filegv;
if (!HvARRAY(stash))
return;
for (i = 0; i <= (I32) HvMAX(stash); i++) {
- for (entry = HvARRAY(stash)[i]; entry; entry = entry->hent_next) {
- if (entry->hent_key[entry->hent_klen-1] == ':' &&
- (gv = (GV*)entry->hent_val) && (hv = GvHV(gv)) && HvNAME(hv))
+ for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) {
+ if (HeKEY(entry)[HeKLEN(entry)-1] == ':' &&
+ (gv = (GV*)HeVAL(entry)) && (hv = GvHV(gv)) && HvNAME(hv))
{
- if (hv != defstash)
+ if (hv != PL_defstash && hv != stash)
gv_check(hv); /* nested package */
}
- else if (isALPHA(*entry->hent_key)) {
- gv = (GV*)entry->hent_val;
- if (SvMULTI(gv))
+ else if (isALPHA(*HeKEY(entry))) {
+ char *file;
+ gv = (GV*)HeVAL(entry);
+ if (SvTYPE(gv) != SVt_PVGV || GvMULTI(gv))
continue;
- curcop->cop_line = GvLINE(gv);
- filegv = GvFILEGV(gv);
- curcop->cop_filegv = filegv;
- if (filegv && SvMULTI(filegv)) /* Filename began with slash */
+ file = GvFILE(gv);
+ /* performance hack: if filename is absolute and it's a standard
+ * module, don't bother warning */
+ if (file
+ && PERL_FILE_IS_ABSOLUTE(file)
+ && (instr(file, "/lib/") || instr(file, ".pm")))
+ {
continue;
- warn("Identifier \"%s::%s\" used only once: possible typo",
+ }
+ CopLINE_set(PL_curcop, GvLINE(gv));
+#ifdef USE_ITHREADS
+ CopFILE(PL_curcop) = file; /* set for warning */
+#else
+ CopFILEGV(PL_curcop) = gv_fetchfile(file);
+#endif
+ Perl_warner(aTHX_ WARN_ONCE,
+ "Name \"%s::%s\" used only once: possible typo",
HvNAME(stash), GvNAME(gv));
}
}
}
GV *
-newGVgen(pack)
-char *pack;
+Perl_newGVgen(pTHX_ char *pack)
{
- (void)sprintf(tokenbuf,"%s::_GEN_%ld",pack,(long)gensym++);
- return gv_fetchpv(tokenbuf,TRUE, SVt_PVGV);
+ return gv_fetchpv(Perl_form(aTHX_ "%s::_GEN_%ld", pack, (long)PL_gensym++),
+ TRUE, SVt_PVGV);
}
/* hopefully this is only called on local symbol table entries */
GP*
-gp_ref(gp)
-GP* gp;
+Perl_gp_ref(pTHX_ GP *gp)
{
+ if (!gp)
+ return (GP*)NULL;
gp->gp_refcnt++;
+ if (gp->gp_cv) {
+ if (gp->gp_cvgen) {
+ /* multi-named GPs cannot be used for method cache */
+ SvREFCNT_dec(gp->gp_cv);
+ gp->gp_cv = Nullcv;
+ gp->gp_cvgen = 0;
+ }
+ else {
+ /* Adding a new name to a subroutine invalidates method cache */
+ PL_sub_generation++;
+ }
+ }
return gp;
-
}
void
-gp_free(gv)
-GV* gv;
+Perl_gp_free(pTHX_ GV *gv)
{
- IO *io;
- CV *cv;
+ dTHR;
GP* gp;
if (!gv || !(gp = GvGP(gv)))
return;
if (gp->gp_refcnt == 0) {
- warn("Attempt to free unreferenced glob pointers");
+ if (ckWARN_d(WARN_INTERNAL))
+ Perl_warner(aTHX_ WARN_INTERNAL,
+ "Attempt to free unreferenced glob pointers");
return;
}
+ if (gp->gp_cv) {
+ /* Deleting the name of a subroutine invalidates method cache */
+ PL_sub_generation++;
+ }
if (--gp->gp_refcnt > 0) {
if (gp->gp_egv == gv)
gp->gp_egv = 0;
SvREFCNT_dec(gp->gp_sv);
SvREFCNT_dec(gp->gp_av);
SvREFCNT_dec(gp->gp_hv);
- if ((io = gp->gp_io) && SvTYPE(io) != SVTYPEMASK) {
- do_close(gv,FALSE);
- SvREFCNT_dec(io);
- }
- if ((cv = gp->gp_cv) && !GvCVGEN(gv))
- SvREFCNT_dec(cv);
+ SvREFCNT_dec(gp->gp_io);
+ SvREFCNT_dec(gp->gp_cv);
SvREFCNT_dec(gp->gp_form);
Safefree(gp);
}
#endif /* Microport 2.4 hack */
-#ifdef OVERLOAD
/* Updates and caches the CV's */
bool
-Gv_AMupdate(stash)
-HV* stash;
+Perl_Gv_AMupdate(pTHX_ HV *stash)
{
- GV** gvp;
- HV* hv;
+ dTHR;
GV* gv;
CV* cv;
MAGIC* mg=mg_find((SV*)stash,'c');
- AMT *amtp=mg ? (AMT*)mg->mg_ptr: NULL;
+ AMT *amtp = (mg) ? (AMT*)mg->mg_ptr: (AMT *) NULL;
+ AMT amt;
+ STRLEN n_a;
+#ifdef OVERLOAD_VIA_HASH
+ GV** gvp;
+ HV* hv;
+#endif
- if (mg && (amtp=((AMT*)(mg->mg_ptr)))->was_ok_am == amagic_generation &&
- amtp->was_ok_sub == sub_generation)
- return HV_AMAGIC(stash)? TRUE: FALSE;
- gvp=(GV**)hv_fetch(stash,"OVERLOAD",8,FALSE);
- if (amtp && amtp->table) {
+ 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;i<NofAMmeth*2;i++) {
+ for (i=1; i<NofAMmeth; i++) {
if (amtp->table[i]) {
SvREFCNT_dec(amtp->table[i]);
}
}
sv_unmagic((SV*)stash, 'c');
- DEBUG_o( deb("Recalcing overload magic in package %s\n",HvNAME(stash)) );
+ DEBUG_o( Perl_deb(aTHX_ "Recalcing overload magic in package %s\n",HvNAME(stash)) );
- if (gvp && ((gv = *gvp) != (GV*)&sv_undef && (hv = GvHV(gv)))) {
+ 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;
- AMT amt;
SV* sv;
SV** svp;
-/* if (*(svp)==(SV*)amagic_generation && *(svp+1)==(SV*)sub_generation) {
- DEBUG_o( deb("Overload magic in package %s up-to-date\n",HvNAME(stash))
-);
- return HV_AMAGIC(stash)? TRUE: FALSE;
- }*/
-
- amt.was_ok_am=amagic_generation;
- amt.was_ok_sub=sub_generation;
- amt.fallback=AMGfallNO;
+ /* Work with "fallback" key, which we assume to be first in PL_AMG_names */
- /* Work with "fallback" key, which we assume to be first in AMG_names */
-
- if ((cp=((char**)(*AMG_names))[0]) &&
- (svp=(SV**)hv_fetch(hv,cp,strlen(cp),FALSE)) && (sv = *svp)) {
+ 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*2;i++) {
- cv=0;
-
- if ( (cp=((char**)(*AMG_names))[i]) ) {
- svp=(SV**)hv_fetch(hv,cp,strlen(cp),FALSE);
- if (svp && ((sv = *svp) != (GV*)&sv_undef)) {
+ 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, na));
+ gv = gv_fetchmethod(stash, SvPV(sv, n_a));
if (gv) cv = GvCV(gv);
break;
}
/* FALL THROUGH */
case SVt_PVHV:
case SVt_PVAV:
- die("Not a subroutine reference in %%OVERLOAD");
+ Perl_croak(aTHX_ "Not a subroutine reference in overload table");
return FALSE;
case SVt_PVCV:
- cv = (CV*)sv;
- break;
+ cv = (CV*)sv;
+ break;
case SVt_PVGV:
- if (!(cv = GvCV((GV*)sv)))
- cv = sv_2cv(sv, &stash, &gv, TRUE);
- break;
+ if (!(cv = GvCVu((GV*)sv)))
+ cv = sv_2cv(sv, &stash, &gv, FALSE);
+ break;
}
if (cv) filled=1;
else {
- die("Method for operation %s not found in package %.256s during blessing\n",
+ Perl_croak(aTHX_ "Method for operation %s not found in package %.256s during blessing\n",
cp,HvNAME(stash));
return FALSE;
}
}
- }
- amt.table[i]=(CV*)SvREFCNT_inc(cv);
+#else
+ {
+ int filled = 0;
+ int i;
+ const char *cp;
+ SV* sv = NULL;
+
+ /* 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;
+ }
+
+ 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);
+ cv = 0;
+ 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;
+
+ 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))
+ || !(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'",
+ (SvPOK(GvSV(gv)) ? SvPVX(GvSV(gv)) : "???" ),
+ cp, HvNAME(stash));
+ } else
+ Perl_croak(aTHX_ "Can't resolve method `%.256s' overloading `%s' in package `%.256s'",
+ (SvPOK(GvSV(gv)) ? SvPVX(GvSV(gv)) : "???" ),
+ cp, HvNAME(stash));
+ }
+ cv = GvCV(gv = ngv);
+ }
+ DEBUG_o( Perl_deb(aTHX_ "Overloading `%s' in package `%.256s' via `%.256s::%.256s' \n",
+ cp, HvNAME(stash), HvNAME(GvSTASH(CvGV(cv))),
+ GvNAME(CvGV(cv))) );
+ filled = 1;
+ }
+#endif
+ amt.table[i]=(CV*)SvREFCNT_inc(cv);
}
- sv_magic((SV*)stash, 0, 'c', (char*)&amt, sizeof(amt));
if (filled) {
-/* HV_badAMAGIC_off(stash);*/
- HV_AMAGIC_on(stash);
+ AMT_AMAGIC_on(&amt);
+ sv_magic((SV*)stash, 0, 'c', (char*)&amt, sizeof(AMT));
return TRUE;
}
}
-/*HV_badAMAGIC_off(stash);*/
- HV_AMAGIC_off(stash);
+ /* Here we have no table: */
+ no_table:
+ AMT_AMAGIC_off(&amt);
+ sv_magic((SV*)stash, 0, 'c', (char*)&amt, sizeof(AMTS));
return FALSE;
}
-/* During call to this subroutine stack can be reallocated. It is
- * advised to call SPAGAIN macro in your code after call */
-
SV*
-amagic_call(left,right,method,flags)
-SV* left;
-SV* right;
-int method;
-int flags;
+Perl_amagic_call(pTHX_ SV *left, SV *right, int method, int flags)
{
+ dTHR;
MAGIC *mg;
CV *cv;
CV **cvp=NULL, **ocvp=NULL;
AMT *amtp, *oamtp;
int fl=0, off, off1, lr=0, assign=AMGf_assign & flags, notfound=0;
- int postpr=0, inc_dec_ass=0, assignshift=assign?1:0;
+ int postpr = 0, force_cpy = 0, assignshift = assign ? 1 : 0;
HV* stash;
if (!(AMGf_noleft & flags) && SvAMAGIC(left)
&& (mg = mg_find((SV*)(stash=SvSTASH(SvRV(left))),'c'))
- && (ocvp = cvp = ((oamtp=amtp=(AMT*)mg->mg_ptr)->table))
+ && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr)
+ ? (oamtp = amtp = (AMT*)mg->mg_ptr)->table
+ : (CV **) NULL))
&& ((cv = cvp[off=method+assignshift])
|| (assign && amtp->fallback > AMGfallNEVER && /* fallback to
* usual method */
int logic;
/* look for substituted methods */
+ /* In all the covered cases we should be called with assign==0. */
switch (method) {
case inc_amg:
- if (((cv = cvp[off=add_ass_amg]) && (inc_dec_ass=1))
- || ((cv = cvp[off=add_amg]) && (postpr=1))) {
- right = &sv_yes; lr = -1; assign = 1;
+ force_cpy = 1;
+ if ((cv = cvp[off=add_ass_amg])
+ || ((cv = cvp[off = add_amg]) && (force_cpy = 0, postpr = 1))) {
+ right = &PL_sv_yes; lr = -1; assign = 1;
}
break;
case dec_amg:
- if (((cv = cvp[off=subtr_ass_amg]) && (inc_dec_ass=1))
- || ((cv = cvp[off=subtr_amg]) && (postpr=1))) {
- right = &sv_yes; lr = -1; assign = 1;
+ force_cpy = 1;
+ if ((cv = cvp[off = subtr_ass_amg])
+ || ((cv = cvp[off = subtr_amg]) && (force_cpy = 0, postpr=1))) {
+ right = &PL_sv_yes; lr = -1; assign = 1;
}
break;
case bool__amg:
case string_amg:
(void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg]));
break;
+ case not_amg:
+ (void)((cv = cvp[off=bool__amg])
+ || (cv = cvp[off=numer_amg])
+ || (cv = cvp[off=string_amg]));
+ postpr = 1;
+ break;
case copy_amg:
{
- SV* ref=SvRV(left);
- if (!SvROK(ref) && SvTYPE(ref) <= SVt_PVMG) { /* Just to be
- * extra
- * causious,
- * maybe in some
- * additional
- * cases sv_setsv
- * is safe too */
- SV* newref = newSVsv(ref);
+ /*
+ * SV* ref causes confusion with the interpreter variable of
+ * the same name
+ */
+ SV* tmpRef=SvRV(left);
+ if (!SvROK(tmpRef) && SvTYPE(tmpRef) <= SVt_PVMG) {
+ /*
+ * Just to be extra cautious. Maybe in some
+ * additional cases sv_setsv is safe, too.
+ */
+ SV* newref = newSVsv(tmpRef);
SvOBJECT_on(newref);
- SvSTASH(newref) = (HV*)SvREFCNT_inc(SvSTASH(ref));
+ SvSTASH(newref) = (HV*)SvREFCNT_inc(SvSTASH(tmpRef));
return newref;
}
}
}
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 iter_amg: /* XXXX Eventually should do to_gv. */
+ 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. */
+ 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 = ((amtp=(AMT*)mg->mg_ptr)->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;
&& !(flags & AMGf_unary)) {
/* We look for substitution for
* comparison operations and
- * concatendation */
+ * concatenation */
if (method==concat_amg || method==concat_ass_amg
|| method==repeat_amg || method==repeat_ass_amg) {
return NULL; /* Delegate operation to string conversion */
goto not_found;
}
} else {
- not_found: /* No method found, either report or die */
+ not_found: /* No method found, either report or croak */
if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */
notfound = 1; lr = -1;
} else if (cvp && (cv=cvp[nomethod_amg])) {
notfound = 1; lr = 1;
} else {
- if (off==-1) off=method;
- sprintf(buf, "Operation `%s': no method found,\n\tleft argument %s%.256s,\n\tright argument %s%.256s",
- ((char**)AMG_names)[method],
+ SV *msg;
+ if (off==-1) off=method;
+ msg = sv_2mortal(Perl_newSVpvf(aTHX_
+ "Operation `%s': no method found,%sargument %s%s%s%s",
+ PL_AMG_names[method + assignshift],
+ (flags & AMGf_unary ? " " : "\n\tleft "),
SvAMAGIC(left)?
"in overloaded package ":
"has no overloaded magic",
HvNAME(SvSTASH(SvRV(left))):
"",
SvAMAGIC(right)?
- "in overloaded package ":
- "has no overloaded magic",
+ ",\n\tright argument in overloaded package ":
+ (flags & AMGf_unary
+ ? ""
+ : ",\n\tright argument has no overloaded magic"),
SvAMAGIC(right)?
HvNAME(SvSTASH(SvRV(right))):
- "");
+ ""));
if (amtp && amtp->fallback >= AMGfallYES) {
- DEBUG_o( deb(buf) );
+ DEBUG_o( Perl_deb(aTHX_ "%s", SvPVX(msg)) );
} else {
- die(buf);
+ Perl_croak(aTHX_ "%"SVf, msg);
}
return NULL;
}
+ force_cpy = force_cpy || assign;
}
}
if (!notfound) {
- DEBUG_o( deb("Overloaded operator `%s'%s%s%s:\n\tmethod%s found%s in package %.256s%s\n",
- ((char**)AMG_names)[off],
+ 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? "" :
- ((char**)AMG_names)[method+assignshift],
+ 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": "") );
+ }
/* Since we use shallow copy during assignment, we need
* to dublicate the contents, probably calling user-supplied
* version of copy operator
*/
- if ((method+assignshift==off
- && (assign || method==inc_amg || method==dec_amg))
- || inc_dec_ass) RvDEEPCP(left);
- }
+ /* We need to copy in following cases:
+ * a) Assignment form was called.
+ * assignshift==1, assign==T, method + 1 == off
+ * 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,
+ * force_cpy == T
+ * d) Increment or decrement, translated to nomethod.
+ * assignshift==0, assign==0,
+ * force_cpy == T
+ * e) Assignment form translated to nomethod.
+ * assignshift==1, assign==T, method + 1 != off
+ * force_cpy == T
+ */
+ /* off is method, method+assignshift, or a result of opcode substitution.
+ * In the latter case assignshift==0, so only notfound case is important.
+ */
+ if (( (method + assignshift == off)
+ && (assign || (method == inc_amg) || (method == dec_amg)))
+ || force_cpy)
+ RvDEEPCP(left);
{
dSP;
BINOP myop;
SV* res;
+ bool oldcatch = CATCH_GET;
+ CATCH_SET(TRUE);
Zero(&myop, 1, BINOP);
myop.op_last = (OP *) &myop;
myop.op_next = Nullop;
- myop.op_flags = OPf_KNOW|OPf_STACKED;
+ myop.op_flags = OPf_WANT_SCALAR | OPf_STACKED;
+ PUSHSTACKi(PERLSI_OVERLOAD);
ENTER;
- SAVESPTR(op);
- op = (OP *) &myop;
+ SAVEOP();
+ PL_op = (OP *) &myop;
+ if (PERLDB_SUB && PL_curstash != PL_debstash)
+ PL_op->op_private |= OPpENTERSUB_DB;
PUTBACK;
pp_pushmark();
- EXTEND(sp, notfound + 5);
+ EXTEND(SP, notfound + 5);
PUSHs(lr>0? right: left);
PUSHs(lr>0? left: right);
- PUSHs( assign ? &sv_undef : (lr>0? &sv_yes: &sv_no));
+ PUSHs( lr > 0 ? &PL_sv_yes : ( assign ? &PL_sv_undef : &PL_sv_no ));
if (notfound) {
- PUSHs( sv_2mortal(newSVpv(((char**)AMG_names)[off],0)) );
+ PUSHs( sv_2mortal(newSVpv((char *)PL_AMG_names[method + assignshift],0)));
}
PUSHs((SV*)cv);
PUTBACK;
- if (op = pp_entersub())
- run();
+ if ((PL_op = Perl_pp_entersub(aTHX)))
+ CALLRUNOPS(aTHX);
LEAVE;
SPAGAIN;
res=POPs;
PUTBACK;
-
- if (notfound) {
- /* sv_2mortal(res); */
- return NULL;
- }
+ POPSTACK;
+ CATCH_SET(oldcatch);
if (postpr) {
int ans;
ans=SvIV(res)!=0; break;
case inc_amg:
case dec_amg:
- SvSetSV(left,res); return res; break;
+ SvSetSV(left,res); return left;
+ case not_amg:
+ ans=!SvTRUE(res); break;
}
- return ans? &sv_yes: &sv_no;
+ return boolSV(ans);
} else if (method==copy_amg) {
if (!SvROK(res)) {
- die("Copy method did not return a reference");
+ Perl_croak(aTHX_ "Copy method did not return a reference");
}
return SvREFCNT_inc(SvRV(res));
} else {
}
}
}
-#endif /* OVERLOAD */
+
+/*
+=for apidoc is_gv_magical
+
+Returns C<TRUE> 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<flags> 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 '\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 '\017': /* $^O */
+ case '\020': /* $^P */
+ case '\023': /* $^S */
+ case '\024': /* $^T */
+ case '\026': /* $^V */
+ if (len == 1)
+ 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;
+}