/* gv.c
*
- * Copyright (c) 1991-1999, Larry Wall
+ * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
+ * 2000, 2001, 2002, 2003, 2004, 2005, 2006, by Larry Wall and others
*
* You may distribute under the terms of either the GNU General Public
* License or the Artistic License, as specified in the README file.
* laughed Pippin.
*/
+/*
+=head1 GV Functions
+
+A GV is a structure which corresponds to to a Perl typeglob, ie *foo.
+It is a structure that holds a pointer to a scalar, an array, a hash etc,
+corresponding to $foo, @foo, %foo.
+
+GVs are usually found as values in stashes (symbol table hashes) where
+Perl stores its global variables.
+
+=cut
+*/
+
#include "EXTERN.h"
#define PERL_IN_GV_C
#include "perl.h"
+static const char S_autoload[] = "AUTOLOAD";
+static const STRLEN S_autolen = sizeof(S_autoload)-1;
+
+
+#ifdef PERL_DONT_CREATE_GVSV
+GV *
+Perl_gv_SVadd(pTHX_ GV *gv)
+{
+ if (!gv || SvTYPE((SV*)gv) != SVt_PVGV)
+ Perl_croak(aTHX_ "Bad symbol for scalar");
+ if (!GvSV(gv))
+ GvSV(gv) = newSV(0);
+ return gv;
+}
+#endif
+
GV *
Perl_gv_AVadd(pTHX_ register GV *gv)
{
GV *
Perl_gv_IOadd(pTHX_ register GV *gv)
{
- if (!gv || SvTYPE((SV*)gv) != SVt_PVGV)
- Perl_croak(aTHX_ "Bad symbol for filehandle");
- if (!GvIOp(gv))
+ dVAR;
+ if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) {
+
+ /*
+ * if it walks like a dirhandle, then let's assume that
+ * this is a dirhandle.
+ */
+ const char * const fh =
+ PL_op->op_type == OP_READDIR ||
+ PL_op->op_type == OP_TELLDIR ||
+ PL_op->op_type == OP_SEEKDIR ||
+ PL_op->op_type == OP_REWINDDIR ||
+ PL_op->op_type == OP_CLOSEDIR ?
+ "dirhandle" : "filehandle";
+ Perl_croak(aTHX_ "Bad symbol for %s", fh);
+ }
+
+ if (!GvIOp(gv)) {
+#ifdef GV_UNIQUE_CHECK
+ if (GvUNIQUE(gv)) {
+ Perl_croak(aTHX_ "Bad symbol for filehandle (GV is unique)");
+ }
+#endif
GvIOp(gv) = newIO();
+ }
return gv;
}
GV *
Perl_gv_fetchfile(pTHX_ const char *name)
{
- dTHR;
+ dVAR;
char smallbuf[256];
char *tmpbuf;
STRLEN tmplen;
GV *gv;
+ if (!PL_defstash)
+ return NULL;
+
tmplen = strlen(name) + 2;
if (tmplen < sizeof smallbuf)
tmpbuf = smallbuf;
else
- New(603, tmpbuf, tmplen + 1, char);
+ Newx(tmpbuf, tmplen + 1, char);
+ /* This is where the debugger's %{"::_<$filename"} hash is created */
tmpbuf[0] = '_';
tmpbuf[1] = '<';
- strcpy(tmpbuf + 2, name);
+ memcpy(tmpbuf + 2, name, tmplen - 1);
gv = *(GV**)hv_fetch(PL_defstash, tmpbuf, tmplen, TRUE);
- if (!isGV(gv))
+ if (!isGV(gv)) {
gv_init(gv, PL_defstash, tmpbuf, tmplen, FALSE);
+#ifdef PERL_DONT_CREATE_GVSV
+ GvSV(gv) = newSVpvn(name, tmplen - 2);
+#else
+ sv_setpvn(GvSV(gv), name, tmplen - 2);
+#endif
+ if (PERLDB_LINE)
+ hv_magic(GvHVn(gv_AVadd(gv)), NULL, PERL_MAGIC_dbfile);
+ }
if (tmpbuf != smallbuf)
Safefree(tmpbuf);
- sv_setpv(GvSV(gv), name);
- if (*name == '/' && (instr(name, "/lib/") || instr(name, ".pm")))
- GvMULTI_on(gv);
- if (PERLDB_LINE)
- hv_magic(GvHVn(gv_AVadd(gv)), gv, 'L');
return gv;
}
+/*
+=for apidoc gv_const_sv
+
+If C<gv> is a typeglob whose subroutine entry is a constant sub eligible for
+inlining, or C<gv> is a placeholder reference that would be promoted to such
+a typeglob, then returns the value returned by the sub. Otherwise, returns
+NULL.
+
+=cut
+*/
+
+SV *
+Perl_gv_const_sv(pTHX_ GV *gv)
+{
+ if (SvTYPE(gv) == SVt_PVGV)
+ return cv_const_sv(GvCVu(gv));
+ return SvROK(gv) ? SvRV(gv) : NULL;
+}
+
+GP *
+Perl_newGP(pTHX_ GV *const gv)
+{
+ GP *gp;
+ const char *const file = CopFILE(PL_curcop) ? CopFILE(PL_curcop) : "";
+ STRLEN len = strlen(file);
+ U32 hash;
+
+ PERL_HASH(hash, file, len);
+
+ Newxz(gp, 1, GP);
+
+#ifndef PERL_DONT_CREATE_GVSV
+ gp->gv_sv = newSV(0);
+#endif
+
+ gp->gp_line = CopLINE(PL_curcop);
+ /* XXX Ideally this cast would be replaced with a change to const char*
+ in the struct. */
+ gp->gp_file_hek = share_hek(file, len, hash);
+ gp->gp_egv = gv;
+ gp->gp_refcnt = 1;
+
+ return gp;
+}
+
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;
+ dVAR;
+ const U32 old_type = SvTYPE(gv);
+ const bool doproto = old_type > SVt_NULL;
+ const char * const proto = (doproto && SvPOK(gv)) ? SvPVX_const(gv) : NULL;
+ SV *const has_constant = doproto && SvROK(gv) ? SvRV(gv) : NULL;
+
+ assert (!(proto && has_constant));
+
+ if (has_constant) {
+ /* The constant has to be a simple scalar type. */
+ switch (SvTYPE(has_constant)) {
+ case SVt_PVAV:
+ case SVt_PVHV:
+ case SVt_PVCV:
+ case SVt_PVFM:
+ case SVt_PVIO:
+ Perl_croak(aTHX_ "Cannot convert a reference to %s to typeglob",
+ sv_reftype(has_constant, 0));
+ }
+ SvRV_set(gv, NULL);
+ SvROK_off(gv);
+ }
+
- sv_upgrade((SV*)gv, SVt_PVGV);
+ if (old_type < SVt_PVGV) {
+ if (old_type >= SVt_PV)
+ SvCUR_set(gv, 0);
+ sv_upgrade((SV*)gv, SVt_PVGV);
+ }
if (SvLEN(gv)) {
if (proto) {
- SvPVX(gv) = NULL;
- SvLEN(gv) = 0;
+ SvPV_set(gv, NULL);
+ SvLEN_set(gv, 0);
SvPOK_off(gv);
} else
- Safefree(SvPVX(gv));
+ Safefree(SvPVX_mutable(gv));
}
- Newz(602, gp, 1, GP);
- GvGP(gv) = gp_ref(gp);
- GvSV(gv) = NEWSV(72,0);
- GvLINE(gv) = PL_curcop->cop_line;
- GvFILEGV(gv) = PL_curcop->cop_filegv;
- GvCVGEN(gv) = 0;
- GvEGV(gv) = gv;
- sv_magic((SV*)gv, (SV*)gv, '*', name, len);
- GvSTASH(gv) = (HV*)SvREFCNT_inc(stash);
- GvNAME(gv) = savepvn(name, len);
- GvNAMELEN(gv) = len;
+ SvSCREAM_on(gv);
+
+ GvGP(gv) = Perl_newGP(aTHX_ gv);
+ GvSTASH(gv) = stash;
+ if (stash)
+ Perl_sv_add_backref(aTHX_ (SV*)stash, (SV*)gv);
+ gv_name_set(gv, name, len, GV_ADD);
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;
+ if (has_constant) {
+ /* newCONSTSUB takes ownership of the reference from us. */
+ GvCV(gv) = newCONSTSUB(stash, name, has_constant);
+ } else {
+ /* XXX unsafe for threads if eval_owner isn't held */
+ (void) start_subparse(0,0); /* Create empty CV in compcv. */
+ GvCV(gv) = PL_compcv;
+ }
LEAVE;
PL_sub_generation++;
- CvGV(GvCV(gv)) = (GV*)SvREFCNT_inc(gv);
- CvFILEGV(GvCV(gv)) = PL_curcop->cop_filegv;
+ CvGV(GvCV(gv)) = gv;
+ CvFILE_set_from_cop(GvCV(gv), 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);
case SVt_PVHV:
(void)GvHVn(gv);
break;
+#ifdef PERL_DONT_CREATE_GVSV
+ case SVt_NULL:
+ case SVt_PVCV:
+ case SVt_PVFM:
+ case SVt_PVGV:
+ break;
+ default:
+ (void)GvSVn(gv);
+#endif
}
}
+/*
+=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)
{
+ dVAR;
AV* av;
GV* topgv;
GV* gv;
GV** gvp;
CV* cv;
+ const char *hvname;
+
+ /* UNIVERSAL methods should be callable without a stash */
+ if (!stash) {
+ level = -1; /* probably appropriate */
+ if(!(stash = gv_stashpvs("UNIVERSAL", FALSE)))
+ return 0;
+ }
+
+ hvname = HvNAME_get(stash);
+ if (!hvname)
+ Perl_croak(aTHX_
+ "Can't use anonymous symbol table for method lookup");
- 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));
+ name, hvname);
- DEBUG_o( Perl_deb(aTHX_ "Looking for method %s in package %s\n",name,HvNAME(stash)) );
+ DEBUG_o( Perl_deb(aTHX_ "Looking for method %s in package %s\n",name,hvname) );
gvp = (GV**)hv_fetch(stash, name, len, (level >= 0));
if (!gvp)
- topgv = Nullgv;
+ topgv = NULL;
else {
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;
/* Stale cached entry: junk it */
SvREFCNT_dec(cv);
- GvCV(topgv) = cv = Nullcv;
+ GvCV(topgv) = cv = NULL;
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;
+ gvp = (GV**)hv_fetchs(stash, "ISA", FALSE);
+ av = (gvp && (gv = *gvp) && gv != (GV*)&PL_sv_undef) ? GvAV(gv) : NULL;
/* create and re-create @.*::SUPER::ISA on demand */
if (!av || !SvMAGIC(av)) {
- char* packname = HvNAME(stash);
- STRLEN packlen = strlen(packname);
+ STRLEN packlen = HvNAMELEN_get(stash);
- if (packlen >= 7 && strEQ(packname + packlen - 7, "::SUPER")) {
+ if (packlen >= 7 && strEQ(hvname + packlen - 7, "::SUPER")) {
HV* basestash;
packlen -= 7;
- basestash = gv_stashpvn(packname, packlen, TRUE);
- gvp = (GV**)hv_fetch(basestash, "ISA", 3, FALSE);
+ basestash = gv_stashpvn(hvname, packlen, TRUE);
+ gvp = (GV**)hv_fetchs(basestash, "ISA", 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);
+ gvp = (GV**)hv_fetchs(stash, "ISA", TRUE);
if (!gvp || !(gv = *gvp))
- Perl_croak(aTHX_ "Cannot create %s::ISA", HvNAME(stash));
+ Perl_croak(aTHX_ "Cannot create %s::ISA", hvname);
if (SvTYPE(gv) != SVt_PVGV)
gv_init(gv, stash, "ISA", 3, TRUE);
SvREFCNT_dec(GvAV(gv));
- GvAV(gv) = (AV*)SvREFCNT_inc(av);
+ GvAV(gv) = (AV*)SvREFCNT_inc_simple(av);
}
}
}
/* NOTE: No support for tied ISA */
I32 items = AvFILLp(av) + 1;
while (items--) {
- SV* sv = *svp++;
- HV* basestash = gv_stashsv(sv, FALSE);
+ SV* const sv = *svp++;
+ HV* const 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));
+ Perl_warner(aTHX_ packWARN(WARN_MISC), "Can't locate package %"SVf" for @%s::ISA",
+ (void*)sv, hvname);
continue;
}
gv = gv_fetchmeth(basestash, name, len,
/* if at top level, try UNIVERSAL */
if (level == 0 || level == -1) {
- HV* lastchance;
+ HV* const lastchance = gv_stashpvs("UNIVERSAL", FALSE);
- if (lastchance = gv_stashpvn("UNIVERSAL", 9, FALSE)) {
- if (gv = gv_fetchmeth(lastchance, name, len,
- (level >= 0) ? level + 1 : level - 1)) {
+ if (lastchance) {
+ if ((gv = gv_fetchmeth(lastchance, name, len,
+ (level >= 0) ? level + 1 : level - 1)))
+ {
gotcha:
/*
* Cache method in topgv if:
(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;
return 0;
}
+/*
+=for apidoc gv_fetchmeth_autoload
+
+Same as gv_fetchmeth(), but looks for autoloaded subroutines too.
+Returns a glob for the subroutine.
+
+For an autoloaded subroutine without a GV, will create a GV even
+if C<level < 0>. For an autoloaded subroutine without a stub, GvCV()
+of the result may be zero.
+
+=cut
+*/
+
GV *
-Perl_gv_fetchmethod(pTHX_ HV *stash, const char *name)
+Perl_gv_fetchmeth_autoload(pTHX_ HV *stash, const char *name, STRLEN len, I32 level)
{
- return gv_fetchmethod_autoload(stash, name, TRUE);
+ GV *gv = gv_fetchmeth(stash, name, len, level);
+
+ if (!gv) {
+ CV *cv;
+ GV **gvp;
+
+ if (!stash)
+ return NULL; /* UNIVERSAL::AUTOLOAD could cause trouble */
+ if (len == S_autolen && strnEQ(name, S_autoload, S_autolen))
+ return NULL;
+ if (!(gv = gv_fetchmeth(stash, S_autoload, S_autolen, FALSE)))
+ return NULL;
+ cv = GvCV(gv);
+ if (!(CvROOT(cv) || CvXSUB(cv)))
+ return NULL;
+ /* Have an autoload */
+ if (level < 0) /* Cannot do without a stub */
+ gv_fetchmeth(stash, name, len, 0);
+ gvp = (GV**)hv_fetch(stash, name, len, (level >= 0));
+ if (!gvp)
+ return NULL;
+ return *gvp;
+ }
+ return gv;
}
+/*
+=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;
+ dVAR;
register const char *nend;
- const char *nsplit = 0;
+ const char *nsplit = NULL;
GV* gv;
-
+ HV* ostash = stash;
+
+ if (stash && SvTYPE(stash) < SVt_PVHV)
+ stash = NULL;
+
for (nend = name; *nend; nend++) {
if (*nend == '\'')
nsplit = nend;
nsplit = ++nend;
}
if (nsplit) {
- const char *origname = name;
+ const char * const 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",
- HvNAME(PL_curcop->cop_stash)));
- stash = gv_stashpvn(SvPVX(tmpstr), SvCUR(tmpstr), TRUE);
+ SV * const tmpstr = sv_2mortal(Perl_newSVpvf(aTHX_ "%s::SUPER",
+ CopSTASHPV(PL_curcop)));
+ /* __PACKAGE__::SUPER stash should be autovivified */
+ stash = gv_stashpvn(SvPVX_const(tmpstr), SvCUR(tmpstr), TRUE);
DEBUG_o( Perl_deb(aTHX_ "Treating %s as %s::%s\n",
- origname, HvNAME(stash), name) );
+ origname, HvNAME_get(stash), name) );
}
- else
- stash = gv_stashpvn(origname, nsplit - origname, TRUE);
+ else {
+ /* don't autovifify if ->NoSuchStash::method */
+ stash = gv_stashpvn(origname, nsplit - origname, FALSE);
+
+ /* however, explicit calls to Pkg::SUPER::method may
+ happen, and may require autovivification to work */
+ if (!stash && (nsplit - origname) >= 7 &&
+ strnEQ(nsplit - 7, "::SUPER", 7) &&
+ gv_stashpvn(origname, nsplit - origname - 7, FALSE))
+ stash = gv_stashpvn(origname, nsplit - origname, TRUE);
+ }
+ ostash = stash;
}
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);
+ gv = gv_autoload4(ostash, name, nend - name, TRUE);
}
else if (autoload) {
- CV* cv = GvCV(gv);
+ CV* const cv = GvCV(gv);
if (!CvROOT(cv) && !CvXSUB(cv)) {
GV* stubgv;
GV* autogv;
GV*
Perl_gv_autoload4(pTHX_ HV *stash, const char *name, STRLEN len, I32 method)
{
- dTHR;
- static char autoload[] = "AUTOLOAD";
- static STRLEN autolen = 8;
+ dVAR;
GV* gv;
CV* cv;
HV* varstash;
GV* vargv;
SV* varsv;
+ const char *packname = "";
+ STRLEN packname_len = 0;
- if (len == autolen && strnEQ(name, autoload, autolen))
- return Nullgv;
- if (!(gv = gv_fetchmeth(stash, autoload, autolen, FALSE)))
- return Nullgv;
+ if (len == S_autolen && strnEQ(name, S_autoload, S_autolen))
+ return NULL;
+ if (stash) {
+ if (SvTYPE(stash) < SVt_PVHV) {
+ packname = SvPV_const((SV*)stash, packname_len);
+ stash = NULL;
+ }
+ else {
+ packname = HvNAME_get(stash);
+ packname_len = HvNAMELEN_get(stash);
+ }
+ }
+ if (!(gv = gv_fetchmeth(stash, S_autoload, S_autolen, FALSE)))
+ return NULL;
cv = GvCV(gv);
+ if (!(CvROOT(cv) || CvXSUB(cv)))
+ return NULL;
+
/*
* Inheriting AUTOLOAD for non-methods works ... for now.
*/
- if (ckWARN(WARN_DEPRECATED) && !method &&
- (GvCVGEN(gv) || GvSTASH(gv) != stash))
- Perl_warner(aTHX_ WARN_DEPRECATED,
+ if (!method && (GvCVGEN(gv) || GvSTASH(gv) != stash)
+ && ckWARN2(WARN_DEPRECATED, WARN_SYNTAX)
+ )
+ Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX),
"Use of inherited AUTOLOAD for non-method %s::%.*s() is deprecated",
- HvNAME(stash), (int)len, name);
+ packname, (int)len, name);
+
+ if (CvISXSUB(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;
+ SvPV_set(cv, (char *)name); /* cast to lose constness warning */
+ SvCUR_set(cv, len);
+ return gv;
+ }
/*
* Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name.
* original package to look up $AUTOLOAD.
*/
varstash = GvSTASH(CvGV(cv));
- vargv = *(GV**)hv_fetch(varstash, autoload, autolen, TRUE);
- if (!isGV(vargv))
- gv_init(vargv, varstash, autoload, autolen, FALSE);
- varsv = GvSV(vargv);
- sv_setpv(varsv, HvNAME(stash));
- sv_catpvn(varsv, "::", 2);
+ vargv = *(GV**)hv_fetch(varstash, S_autoload, S_autolen, TRUE);
+ ENTER;
+
+ if (!isGV(vargv)) {
+ gv_init(vargv, varstash, S_autoload, S_autolen, FALSE);
+#ifdef PERL_DONT_CREATE_GVSV
+ GvSV(vargv) = newSV(0);
+#endif
+ }
+ LEAVE;
+ varsv = GvSVn(vargv);
+ sv_setpvn(varsv, packname, packname_len);
+ sv_catpvs(varsv, "::");
sv_catpvn(varsv, name, len);
SvTAINTED_off(varsv);
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)
+{
+ dVAR;
+ HV* stash = gv_stashpvs("Errno", FALSE);
+
+ if (!stash || !(gv_fetchmethod(stash, "TIEHASH"))) {
+ dSP;
+ PUTBACK;
+ ENTER;
+ save_scalar(gv); /* keep the value of $! */
+ Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT,
+ newSVpvs("Errno"), NULL);
+ LEAVE;
+ SPAGAIN;
+ stash = gv_stashpvs("Errno", 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. C<name> should
+be a valid UTF-8 string and must be null-terminated. 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);
}
+/*
+=for apidoc gv_stashpvn
+
+Returns a pointer to the stash for a specified package. C<name> should
+be a valid UTF-8 string. The C<namelen> parameter indicates the length of
+the C<name>, in bytes. 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_stashpvn(pTHX_ const char *name, U32 namelen, I32 create)
{
- char smallbuf[256];
+ char smallbuf[128];
char *tmpbuf;
HV *stash;
GV *tmpgv;
if (namelen + 3 < sizeof smallbuf)
tmpbuf = smallbuf;
else
- New(606, tmpbuf, namelen + 3, char);
+ Newx(tmpbuf, namelen + 3, char);
Copy(name,tmpbuf,namelen,char);
tmpbuf[namelen++] = ':';
tmpbuf[namelen++] = ':';
tmpbuf[namelen] = '\0';
- tmpgv = gv_fetchpv(tmpbuf, create, SVt_PVHV);
+ tmpgv = gv_fetchpvn_flags(tmpbuf, namelen, create, SVt_PVHV);
if (tmpbuf != smallbuf)
Safefree(tmpbuf);
if (!tmpgv)
if (!GvHV(tmpgv))
GvHV(tmpgv) = newHV();
stash = GvHV(tmpgv);
- if (!HvNAME(stash))
- HvNAME(stash) = savepv(name);
+ if (!HvNAME_get(stash))
+ hv_name_set(stash, name, namelen, 0);
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);
+ const char * const ptr = SvPV_const(sv,len);
return gv_stashpvn(ptr, len, create);
}
GV *
-Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 add, I32 sv_type)
+Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 add, I32 sv_type) {
+ return gv_fetchpvn_flags(nambeg, strlen(nambeg), add, sv_type);
+}
+
+GV *
+Perl_gv_fetchsv(pTHX_ SV *name, I32 flags, I32 sv_type) {
+ STRLEN len;
+ const char * const nambeg = SvPV_const(name, len);
+ return gv_fetchpvn_flags(nambeg, len, flags | SvUTF8(name), sv_type);
+}
+
+GV *
+Perl_gv_fetchpvn_flags(pTHX_ const char *nambeg, STRLEN full_len, I32 flags,
+ I32 sv_type)
{
- dTHR;
+ dVAR;
register const char *name = nambeg;
- register GV *gv = 0;
+ register GV *gv = NULL;
GV**gvp;
I32 len;
- register const char *namend;
- HV *stash = 0;
- U32 add_gvflags = 0;
+ register const char *name_cursor;
+ HV *stash = NULL;
+ const I32 no_init = flags & (GV_NOADD_NOINIT | GV_NOINIT);
+ const I32 no_expand = flags & GV_NOEXPAND;
+ const I32 add =
+ flags & ~SVf_UTF8 & ~GV_NOADD_NOINIT & ~GV_NOEXPAND & ~GV_NOTQUAL;
+ const char *const name_end = nambeg + full_len;
+ const char *const name_em1 = name_end - 1;
+
+ if (flags & GV_NOTQUAL) {
+ /* Caller promised that there is no stash, so we can skip the check. */
+ len = full_len;
+ goto no_stash;
+ }
- if (*name == '*' && isALPHA(name[1])) /* accidental stringify on a GV? */
+ if (full_len > 2 && *name == '*' && isALPHA(name[1])) {
+ /* accidental stringify on a GV? */
name++;
+ }
- for (namend = name; *namend; namend++) {
- if ((*namend == '\'' && namend[1]) ||
- (*namend == ':' && namend[1] == ':'))
+ for (name_cursor = name; name_cursor < name_end; name_cursor++) {
+ if ((*name_cursor == ':' && name_cursor < name_em1
+ && name_cursor[1] == ':')
+ || (*name_cursor == '\'' && name_cursor[1]))
{
if (!stash)
stash = PL_defstash;
if (!stash || !SvREFCNT(stash)) /* symbol table under destruction */
- return Nullgv;
+ return NULL;
- len = namend - name;
+ len = name_cursor - name;
if (len > 0) {
- char smallbuf[256];
+ char smallbuf[128];
char *tmpbuf;
- if (len + 3 < sizeof smallbuf)
+ if (len + 3 < (I32)sizeof (smallbuf))
tmpbuf = smallbuf;
else
- New(601, tmpbuf, len+3, char);
+ Newx(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;
+ gv = gvp ? *gvp : NULL;
if (gv && gv != (GV*)&PL_sv_undef) {
if (SvTYPE(gv) != SVt_PVGV)
gv_init(gv, stash, tmpbuf, len, (add & GV_ADDMULTI));
if (tmpbuf != smallbuf)
Safefree(tmpbuf);
if (!gv || gv == (GV*)&PL_sv_undef)
- return Nullgv;
+ return NULL;
if (!(stash = GvHV(gv)))
stash = GvHV(gv) = newHV();
- if (!HvNAME(stash))
- HvNAME(stash) = savepvn(nambeg, namend - nambeg);
+ if (!HvNAME_get(stash))
+ hv_name_set(stash, nambeg, name_cursor - nambeg, 0);
}
- if (*namend == ':')
- namend++;
- namend++;
- name = namend;
- if (!*name)
- return gv ? gv : (GV*)*hv_fetch(PL_defstash, "main::", 6, TRUE);
+ if (*name_cursor == ':')
+ name_cursor++;
+ name_cursor++;
+ name = name_cursor;
+ if (name == name_end)
+ return gv ? gv : (GV*)*hv_fetchs(PL_defstash, "main::", TRUE);
}
}
- len = namend - name;
- if (!len)
- len = 1;
+ len = name_cursor - name;
/* No stash in name, so see how we can default */
if (!stash) {
- if (isIDFIRST(*name)
- || (IN_UTF8 && ((*name & 0xc0) == 0xc0) && isIDFIRST_utf8((U8*)name)))
- {
+ no_stash:
+ if (len && isIDFIRST_lazy(name)) {
bool global = FALSE;
- if (isUPPER(*name)) {
- if (*name == 'S' && (
- strEQ(name, "SIG") ||
- strEQ(name, "STDIN") ||
- strEQ(name, "STDOUT") ||
- strEQ(name, "STDERR")))
+ switch (len) {
+ case 1:
+ if (*name == '_')
+ global = TRUE;
+ break;
+ case 3:
+ if ((name[0] == 'I' && name[1] == 'N' && name[2] == 'C')
+ || (name[0] == 'E' && name[1] == 'N' && name[2] == 'V')
+ || (name[0] == 'S' && name[1] == 'I' && name[2] == 'G'))
global = TRUE;
- else if (*name == 'I' && strEQ(name, "INC"))
+ break;
+ case 4:
+ if (name[0] == 'A' && name[1] == 'R' && name[2] == 'G'
+ && name[3] == 'V')
global = TRUE;
- else if (*name == 'E' && strEQ(name, "ENV"))
+ break;
+ case 5:
+ if (name[0] == 'S' && name[1] == 'T' && name[2] == 'D'
+ && name[3] == 'I' && name[4] == 'N')
global = TRUE;
- else if (*name == 'A' && (
- strEQ(name, "ARGV") ||
- strEQ(name, "ARGVOUT")))
+ break;
+ case 6:
+ if ((name[0] == 'S' && name[1] == 'T' && name[2] == 'D')
+ &&((name[3] == 'O' && name[4] == 'U' && name[5] == 'T')
+ ||(name[3] == 'E' && name[4] == 'R' && name[5] == 'R')))
global = TRUE;
+ break;
+ case 7:
+ if (name[0] == 'A' && name[1] == 'R' && name[2] == 'G'
+ && name[3] == 'V' && name[4] == 'O' && name[5] == 'U'
+ && name[6] == 'T')
+ global = TRUE;
+ break;
}
- else if (*name == '_' && !name[1])
- global = TRUE;
if (global)
stash = PL_defstash;
- else if ((COP*)PL_curcop == &PL_compiling) {
+ else if (IN_PERL_COMPILETIME) {
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)) )
+ !(len == 1 && sv_type == SVt_PV &&
+ (*name == 'a' || *name == 'b')) )
{
gvp = (GV**)hv_fetch(stash,name,len,0);
if (!gvp ||
*gvp == (GV*)&PL_sv_undef ||
SvTYPE(*gvp) != SVt_PVGV)
{
- stash = 0;
+ stash = NULL;
}
- 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);
- stash = 0;
+ Perl_warn(aTHX_ "\t(Did you mean &%s instead?)\n", name);
+ stash = NULL;
}
}
}
else
- stash = PL_curcop->cop_stash;
+ stash = CopSTASH(PL_curcop);
}
else
stash = PL_defstash;
/* By this point we should have a stash and a name */
if (!stash) {
- if (!add)
- return Nullgv;
- {
- char sv_type_char = ((sv_type == SVt_PV) ? '$'
- : (sv_type == SVt_PVAV) ? '@'
- : (sv_type == SVt_PVHV) ? '%'
- : 0);
- if (sv_type_char)
- Perl_warn(aTHX_ "Global symbol \"%c%s\" requires explicit package name",
- sv_type_char, name);
- else
- Perl_warn(aTHX_ "Global symbol \"%s\" requires explicit package name",
- name);
+ if (add) {
+ SV * const err = Perl_mess(aTHX_
+ "Global symbol \"%s%s\" requires explicit package name",
+ (sv_type == SVt_PV ? "$"
+ : sv_type == SVt_PVAV ? "@"
+ : sv_type == SVt_PVHV ? "%"
+ : ""), name);
+ if (USE_UTF8_IN_NAMES)
+ SvUTF8_on(err);
+ qerror(err);
+ stash = GvHV(gv_fetchpvn_flags("<none>::", 8, GV_ADDMULTI, SVt_PVHV));
}
- ++PL_error_count;
- stash = PL_curstash ? PL_curstash : PL_defstash; /* avoid core dumps */
- add_gvflags = ((sv_type == SVt_PV) ? GVf_IMPORTED_SV
- : (sv_type == SVt_PVAV) ? GVf_IMPORTED_AV
- : (sv_type == SVt_PVHV) ? GVf_IMPORTED_HV
- : 0);
+ else
+ return NULL;
}
if (!SvREFCNT(stash)) /* symbol table under destruction */
- return Nullgv;
+ return NULL;
gvp = (GV**)hv_fetch(stash,name,len,add);
if (!gvp || *gvp == (GV*)&PL_sv_undef)
- return Nullgv;
+ return NULL;
gv = *gvp;
if (SvTYPE(gv) == SVt_PVGV) {
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) {
+ } else if (no_init) {
+ return gv;
+ } else if (no_expand && SvROK(gv)) {
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);
+ Perl_warner(aTHX_ packWARN(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 */
- 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)
+ if (len > 1) {
+#ifndef EBCDIC
+ if (*name > 'V' ) {
+ NOOP;
+ /* Nothing else to do.
+ The compiler will probably turn the switch statement into a
+ branch table. Make sure we avoid even that small overhead for
+ the common case of lower case variable names. */
+ } else
+#endif
+ {
+ const char * const name2 = name + 1;
+ switch (*name) {
+ case 'A':
+ if (strEQ(name2, "RGV")) {
+ IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START;
+ }
+ break;
+ case 'E':
+ if (strnEQ(name2, "XPORT", 5))
+ GvMULTI_on(gv);
+ break;
+ case 'I':
+ if (strEQ(name2, "SA")) {
+ AV* const av = GvAVn(gv);
+ GvMULTI_on(gv);
+ sv_magic((SV*)av, (SV*)gv, PERL_MAGIC_isa, NULL, 0);
+ /* NOTE: No support for tied ISA */
+ if ((add & GV_ADDMULTI) && strEQ(nambeg,"AnyDBM_File::ISA")
+ && AvFILLp(av) == -1)
+ {
+ const 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(name2, "VERLOAD")) {
+ HV* const hv = GvHVn(gv);
+ GvMULTI_on(gv);
+ hv_magic(hv, NULL, PERL_MAGIC_overload);
+ }
+ break;
+ case 'S':
+ if (strEQ(name2, "IG")) {
+ HV *hv;
+ I32 i;
+ if (!PL_psig_ptr) {
+ Newxz(PL_psig_ptr, SIG_SIZE, SV*);
+ Newxz(PL_psig_name, SIG_SIZE, SV*);
+ Newxz(PL_psig_pend, SIG_SIZE, int);
+ }
+ GvMULTI_on(gv);
+ hv = GvHVn(gv);
+ hv_magic(hv, NULL, PERL_MAGIC_sig);
+ for (i = 1; i < SIG_SIZE; i++) {
+ SV * const * const 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;
+ case 'V':
+ if (strEQ(name2, "ERSION"))
+ GvMULTI_on(gv);
+ break;
+ case '\003': /* $^CHILD_ERROR_NATIVE */
+ if (strEQ(name2, "HILD_ERROR_NATIVE"))
+ goto magicalize;
+ break;
+ case '\005': /* $^ENCODING */
+ if (strEQ(name2, "NCODING"))
+ goto magicalize;
+ break;
+ case '\017': /* $^OPEN */
+ if (strEQ(name2, "PEN"))
+ goto magicalize;
+ break;
+ case '\024': /* ${^TAINT} */
+ if (strEQ(name2, "AINT"))
+ goto ro_magicalize;
+ break;
+ case '\025': /* ${^UNICODE}, ${^UTF8LOCALE} */
+ if (strEQ(name2, "NICODE"))
+ goto ro_magicalize;
+ if (strEQ(name2, "TF8LOCALE"))
+ goto ro_magicalize;
+ if (strEQ(name2, "TF8CACHE"))
+ goto magicalize;
+ break;
+ case '\027': /* $^WARNING_BITS */
+ if (strEQ(name2, "ARNING_BITS"))
+ goto magicalize;
+ break;
+ case '1':
+ case '2':
+ case '3':
+ case '4':
+ case '5':
+ case '6':
+ case '7':
+ case '8':
+ case '9':
{
- 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);
+ /* ensures variable is only digits */
+ /* ${"1foo"} fails this test (and is thus writeable) */
+ /* added by japhy, but borrowed from is_gv_magical */
+ const char *end = name + len;
+ while (--end > name) {
+ if (!isDIGIT(*end)) return gv;
+ }
+ goto ro_magicalize;
}
- }
- break;
- case 'O':
- if (strEQ(name, "OVERLOAD")) {
- HV* hv = GvHVn(gv);
- GvMULTI_on(gv);
- hv_magic(hv, gv, 'A');
- }
- break;
- case 'S':
- if (strEQ(name, "SIG")) {
- HV *hv;
- I32 i;
- PL_siggv = gv;
- GvMULTI_on(PL_siggv);
- hv = GvHVn(PL_siggv);
- hv_magic(hv, PL_siggv, '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 '&':
- if (len > 1)
- break;
- PL_ampergv = gv;
- PL_sawampersand = TRUE;
- goto ro_magicalize;
+ } else {
+ /* Names of length 1. (Or 0. But name is NUL terminated, so that will
+ be case '\0' in this switch statement (ie a default case) */
+ switch (*name) {
+ case '&':
+ case '`':
+ case '\'':
+ if (
+ 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;
+
+ case ':':
+ sv_setpv(GvSVn(gv),PL_chopset);
+ goto magicalize;
+
+ case '?':
+#ifdef COMPLEX_STATUS
+ SvUPGRADE(GvSVn(gv), SVt_PVLV);
+#endif
+ goto magicalize;
- case '`':
- if (len > 1)
- break;
- PL_leftgv = gv;
- PL_sawampersand = TRUE;
- goto ro_magicalize;
+ case '!':
- case '\'':
- if (len > 1)
- break;
- PL_rightgv = gv;
- PL_sawampersand = TRUE;
- goto ro_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)
+ */
- case ':':
- if (len > 1)
- break;
- sv_setpv(GvSV(gv),PL_chopset);
- goto magicalize;
+ sv_magic(GvSVn(gv), (SV*)gv, PERL_MAGIC_sv, name, len);
- case '?':
- if (len > 1)
- break;
-#ifdef COMPLEX_STATUS
- (void)SvUPGRADE(GvSV(gv), SVt_PVLV);
-#endif
- goto magicalize;
+ if (sv_type == SVt_PVHV)
+ require_errno(gv);
- 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");
- }
+ case '-':
+ {
+ AV* const av = GvAVn(gv);
+ sv_magic((SV*)av, NULL, PERL_MAGIC_regdata, NULL, 0);
+ SvREADONLY_on(av);
+ goto magicalize;
}
- goto magicalize;
- case '-':
- if (len > 1)
- break;
- else {
- AV* av = GvAVn(gv);
- sv_magic((SV*)av, Nullsv, 'D', Nullch, 0);
- }
- goto magicalize;
- case '#':
- case '*':
- if (ckWARN(WARN_DEPRECATED) && len == 1 && sv_type == SVt_PV)
- Perl_warner(aTHX_ WARN_DEPRECATED, "Use of $%s is deprecated", name);
- /* FALL THROUGH */
- case '[':
- case '^':
- case '~':
- case '=':
- case '%':
- case '.':
- case '(':
- case ')':
- case '<':
- case '>':
- case ',':
- case '\\':
- case '/':
- case '|':
- case '\001':
- case '\002':
- case '\003':
- case '\004':
- case '\005':
- case '\006':
- case '\010':
- case '\011': /* NOT \t in EBCDIC */
- case '\017':
- case '\020':
- case '\024':
- case '\027':
- if (len > 1)
+ case '*':
+ case '#':
+ if (sv_type == SVt_PV && ckWARN2(WARN_DEPRECATED, WARN_SYNTAX))
+ Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX),
+ "$%c is no longer supported", *name);
break;
- goto magicalize;
- case '\023':
- if (len > 1)
- break;
- goto ro_magicalize;
+ case '|':
+ sv_setiv(GvSVn(gv), (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0);
+ goto magicalize;
- case '+':
- if (len > 1)
+ case '\010': /* $^H */
+ {
+ HV *const hv = GvHVn(gv);
+ hv_magic(hv, NULL, PERL_MAGIC_hints);
+ }
+ goto magicalize;
+
+ case '+':
+ {
+ AV* const av = GvAVn(gv);
+ sv_magic((SV*)av, (SV*)av, PERL_MAGIC_regdata, NULL, 0);
+ SvREADONLY_on(av);
+ /* FALL THROUGH */
+ }
+ case '\023': /* $^S */
+ case '1':
+ case '2':
+ case '3':
+ case '4':
+ case '5':
+ case '6':
+ case '7':
+ case '8':
+ case '9':
+ ro_magicalize:
+ SvREADONLY_on(GvSVn(gv));
+ /* FALL THROUGH */
+ 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 '\011': /* $^I, NOT \t in EBCDIC */
+ case '\016': /* $^N */
+ case '\017': /* $^O */
+ case '\020': /* $^P */
+ case '\024': /* $^T */
+ case '\027': /* $^W */
+ magicalize:
+ sv_magic(GvSVn(gv), (SV*)gv, PERL_MAGIC_sv, name, len);
break;
- else {
- AV* av = GvAVn(gv);
- sv_magic((SV*)av, (SV*)av, 'D', Nullch, 0);
- }
- /* 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':
- if (len > 1)
+ case '\014': /* $^L */
+ sv_setpvn(GvSVn(gv),"\f",1);
+ PL_formfeed = GvSVn(gv);
break;
- sv_setpv(GvSV(gv),"\f");
- PL_formfeed = GvSV(gv);
- break;
- case ';':
- if (len > 1)
+ case ';':
+ sv_setpvn(GvSVn(gv),"\034",1);
break;
- sv_setpv(GvSV(gv),"\034");
+ case ']':
+ {
+ SV * const sv = GvSVn(gv);
+ if (!sv_derived_from(PL_patchlevel, "version"))
+ upg_version(PL_patchlevel);
+ GvSV(gv) = vnumify(PL_patchlevel);
+ SvREADONLY_on(GvSV(gv));
+ SvREFCNT_dec(sv);
+ }
break;
- case ']':
- if (len == 1) {
- SV *sv = GvSV(gv);
- (void)SvUPGRADE(sv, SVt_PVNV);
- sv_setpv(sv, PL_patchlevel);
- (void)sv_2nv(sv);
- SvREADONLY_on(sv);
+ case '\026': /* $^V */
+ {
+ SV * const sv = GvSVn(gv);
+ GvSV(gv) = new_version(PL_patchlevel);
+ SvREADONLY_on(GvSV(gv));
+ SvREFCNT_dec(sv);
}
break;
+ }
}
return gv;
}
void
-Perl_gv_fullname3(pTHX_ SV *sv, GV *gv, const char *prefix)
+Perl_gv_fullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain)
{
- HV *hv = GvSTASH(gv);
+ const char *name;
+ STRLEN namelen;
+ const HV * const hv = GvSTASH(gv);
if (!hv) {
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_efullname3(pTHX_ SV *sv, GV *gv, const char *prefix)
-{
- GV *egv = GvEGV(gv);
- if (!egv)
- egv = gv;
- gv_fullname3(sv, egv, prefix);
-}
+ name = HvNAME_get(hv);
+ if (name) {
+ namelen = HvNAMELEN_get(hv);
+ } else {
+ name = "__ANON__";
+ namelen = 8;
+ }
-/* XXX compatibility with versions <= 5.003. */
-void
-Perl_gv_fullname(pTHX_ SV *sv, GV *gv)
-{
- gv_fullname3(sv, gv, sv == (SV*)gv ? "*" : "");
+ if (keepmain || strNE(name, "main")) {
+ sv_catpvn(sv,name,namelen);
+ sv_catpvs(sv,"::");
+ }
+ sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv));
}
-/* XXX compatibility with versions <= 5.003. */
void
-Perl_gv_efullname(pTHX_ SV *sv, GV *gv)
+Perl_gv_efullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain)
{
- gv_efullname3(sv, gv, sv == (SV*)gv ? "*" : "");
+ const GV * const egv = GvEGV(gv);
+ gv_fullname4(sv, egv ? egv : gv, prefix, keepmain);
}
IO *
Perl_newIO(pTHX)
{
- dTHR;
- IO *io;
+ dVAR;
GV *iogv;
+ IO * const io = (IO*)newSV(0);
- io = (IO*)NEWSV(0,0);
sv_upgrade((SV *)io,SVt_PVIO);
- SvREFCNT(io) = 1;
+ /* This used to read SvREFCNT(io) = 1;
+ It's not clear why the reference count needed an explicit reset. NWC
+ */
+ assert (SvREFCNT(io) == 1);
SvOBJECT_on(io);
- iogv = gv_fetchpv("FileHandle::", FALSE, SVt_PVHV);
+ /* Clear the stashcache because a new IO could overrule a package name */
+ hv_clear(PL_stashcache);
+ iogv = gv_fetchpvs("FileHandle::", 0, 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));
+ iogv = gv_fetchpvs("IO::Handle::", GV_ADD, SVt_PVHV);
+ SvSTASH_set(io, (HV*)SvREFCNT_inc(GvHV(iogv)));
return io;
}
void
-Perl_gv_check(pTHX_ HV *stash)
+Perl_gv_check(pTHX_ const HV *stash)
{
- dTHR;
- register HE *entry;
+ dVAR;
register I32 i;
- register GV *gv;
- HV *hv;
- GV *filegv;
if (!HvARRAY(stash))
return;
for (i = 0; i <= (I32) HvMAX(stash); i++) {
+ const HE *entry;
for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) {
+ register GV *gv;
+ HV *hv;
if (HeKEY(entry)[HeKLEN(entry)-1] == ':' &&
- (gv = (GV*)HeVAL(entry)) && (hv = GvHV(gv)) && HvNAME(hv))
+ (gv = (GV*)HeVAL(entry)) && isGV(gv) && (hv = GvHV(gv)))
{
if (hv != PL_defstash && hv != stash)
gv_check(hv); /* nested package */
}
else if (isALPHA(*HeKEY(entry))) {
+ const char *file;
gv = (GV*)HeVAL(entry);
if (SvTYPE(gv) != SVt_PVGV || GvMULTI(gv))
continue;
- PL_curcop->cop_line = GvLINE(gv);
- filegv = GvFILEGV(gv);
- PL_curcop->cop_filegv = filegv;
- if (filegv && GvMULTI(filegv)) /* Filename began with slash */
+ file = GvFILE(gv);
+ /* performance hack: if filename is absolute and it's a standard
+ * module, don't bother warning */
+#ifdef MACOS_TRADITIONAL
+# define LIB_COMPONENT ":lib:"
+#else
+# define LIB_COMPONENT "/lib/"
+#endif
+ if (file
+ && PERL_FILE_IS_ABSOLUTE(file)
+ && (instr(file, LIB_COMPONENT) || instr(file, ".pm")))
+ {
continue;
- Perl_warner(aTHX_ WARN_ONCE,
+ }
+ CopLINE_set(PL_curcop, GvLINE(gv));
+#ifdef USE_ITHREADS
+ CopFILE(PL_curcop) = (char *)file; /* set for warning */
+#else
+ CopFILEGV(PL_curcop) = gv_fetchfile(file);
+#endif
+ Perl_warner(aTHX_ packWARN(WARN_ONCE),
"Name \"%s::%s\" used only once: possible typo",
- HvNAME(stash), GvNAME(gv));
+ HvNAME_get(stash), GvNAME(gv));
}
}
}
}
GV *
-Perl_newGVgen(pTHX_ char *pack)
+Perl_newGVgen(pTHX_ const char *pack)
{
+ dVAR;
return gv_fetchpv(Perl_form(aTHX_ "%s::_GEN_%ld", pack, (long)PL_gensym++),
- TRUE, SVt_PVGV);
+ GV_ADD, SVt_PVGV);
}
/* hopefully this is only called on local symbol table entries */
GP*
Perl_gp_ref(pTHX_ GP *gp)
{
+ dVAR;
+ if (!gp)
+ return 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_cv = NULL;
gp->gp_cvgen = 0;
}
else {
void
Perl_gp_free(pTHX_ GV *gv)
{
+ dVAR;
GP* gp;
- CV* cv;
- dTHR;
- if (!gv || !(gp = GvGP(gv)))
+ if (!gv || !isGV_with_GP(gv) || !(gp = GvGP(gv)))
return;
- if (gp->gp_refcnt == 0 && ckWARN_d(WARN_INTERNAL)) {
- Perl_warner(aTHX_ WARN_INTERNAL, "Attempt to free unreferenced glob pointers");
+ if (gp->gp_refcnt == 0) {
+ if (ckWARN_d(WARN_INTERNAL))
+ Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
+ "Attempt to free unreferenced glob pointers"
+ pTHX__FORMAT pTHX__VALUE);
return;
}
if (gp->gp_cv) {
if (--gp->gp_refcnt > 0) {
if (gp->gp_egv == gv)
gp->gp_egv = 0;
+ GvGP(gv) = 0;
return;
}
+ unshare_hek(gp->gp_file_hek);
SvREFCNT_dec(gp->gp_sv);
SvREFCNT_dec(gp->gp_av);
- SvREFCNT_dec(gp->gp_hv);
+ /* FIXME - another reference loop GV -> symtab -> GV ?
+ Somehow gp->gp_hv can end up pointing at freed garbage. */
+ if (gp->gp_hv && SvTYPE(gp->gp_hv) == SVt_PVHV) {
+ const char *hvname = HvNAME_get(gp->gp_hv);
+ if (PL_stashcache && hvname)
+ hv_delete(PL_stashcache, hvname, HvNAMELEN_get(gp->gp_hv),
+ G_DISCARD);
+ SvREFCNT_dec(gp->gp_hv);
+ }
SvREFCNT_dec(gp->gp_io);
SvREFCNT_dec(gp->gp_cv);
SvREFCNT_dec(gp->gp_form);
GvGP(gv) = 0;
}
-#if defined(CRIPPLED_CC) && (defined(iAPX286) || defined(M_I286) || defined(I80286))
-#define MICROPORT
-#endif
-
-#ifdef MICROPORT /* Microport 2.4 hack */
-AV *GvAVn(gv)
-register GV *gv;
-{
- if (GvGP(gv)->gp_av)
- return GvGP(gv)->gp_av;
- else
- return GvGP(gv_AVadd(gv))->gp_av;
-}
-
-HV *GvHVn(gv)
-register GV *gv;
+int
+Perl_magic_freeovrld(pTHX_ SV *sv, MAGIC *mg)
{
- if (GvGP(gv)->gp_hv)
- return GvGP(gv)->gp_hv;
- else
- return GvGP(gv_HVadd(gv))->gp_hv;
+ AMT * const amtp = (AMT*)mg->mg_ptr;
+ PERL_UNUSED_ARG(sv);
+
+ if (amtp && AMT_AMAGIC(amtp)) {
+ int i;
+ for (i = 1; i < NofAMmeth; i++) {
+ CV * const cv = amtp->table[i];
+ if (cv) {
+ SvREFCNT_dec((SV *) cv);
+ amtp->table[i] = NULL;
+ }
+ }
+ }
+ return 0;
}
-#endif /* Microport 2.4 hack */
/* 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');
- AMT *amtp = (mg) ? (AMT*)mg->mg_ptr: (AMT *) NULL;
+ dVAR;
+ MAGIC* const mg = mg_find((SV*)stash, PERL_MAGIC_overload_table);
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; i<NofAMmeth; i++) {
- if (amtp->table[i]) {
- SvREFCNT_dec(amtp->table[i]);
+
+ if (mg) {
+ const AMT * const amtp = (AMT*)mg->mg_ptr;
+ if (amtp->was_ok_am == PL_amagic_generation
+ && amtp->was_ok_sub == PL_sub_generation) {
+ return (bool)AMT_OVERLOADED(amtp);
}
- }
+ sv_unmagic((SV*)stash, PERL_MAGIC_overload_table);
}
- sv_unmagic((SV*)stash, 'c');
- DEBUG_o( Perl_deb(aTHX_ "Recalcing overload magic in package %s\n",HvNAME(stash)) );
+ DEBUG_o( Perl_deb(aTHX_ "Recalcing overload magic in package %s\n",HvNAME_get(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;
- SV* sv = NULL;
- SV** svp;
+ int filled = 0, have_ovl = 0;
+ int i, lim = 1;
/* 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);
+ /* Try to find via inheritance. */
+ GV *gv = gv_fetchmeth(stash, PL_AMG_names[0], 2, -1);
+ SV * const sv = gv ? GvSV(gv) : NULL;
+ CV* cv;
- if (!gv) goto no_table;
- else if (SvTRUE(sv)) amt.fallback=AMGfallYES;
- else if (SvOK(sv)) amt.fallback=AMGfallNEVER;
+ if (!gv)
+ lim = DESTROY_amg; /* Skip overloading entries. */
+#ifdef PERL_DONT_CREATE_GVSV
+ else if (!sv) {
+ NOOP; /* Equivalent to !SvTRUE and !SvOK */
}
-
- 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);
+#endif
+ else if (SvTRUE(sv))
+ amt.fallback=AMGfallYES;
+ else if (SvOK(sv))
+ amt.fallback=AMGfallNEVER;
+
+ for (i = 1; i < lim; i++)
+ amt.table[i] = NULL;
+ for (; i < NofAMmeth; i++) {
+ const char * const cooky = PL_AMG_names[i];
+ /* Human-readable form, for debugging: */
+ const char * const cp = (i >= DESTROY_amg ? cooky : AMG_id2name(i));
+ const STRLEN l = strlen(cooky);
+
+ DEBUG_o( Perl_deb(aTHX_ "Checking overloading of \"%s\" in package \"%.256s\"\n",
+ cp, HvNAME_get(stash)) );
+ /* don't fill the cache while looking up!
+ Creation of inheritance stubs in intermediate packages may
+ conflict with the logic of runtime method substitution.
+ Indeed, for inheritance A -> B -> C, if C overloads "+0",
+ then we could have created stubs for "(+0" in A and C too.
+ But if B overloads "bool", we may want to use it for
+ numifying instead of C's "+0". */
+ if (i >= DESTROY_amg)
+ gv = Perl_gv_fetchmeth_autoload(aTHX_ stash, cooky, l, 0);
+ else /* Autoload taken care of below */
+ gv = Perl_gv_fetchmeth(aTHX_ stash, cooky, l, -1);
cv = 0;
- if(gv && (cv = GvCV(gv))) {
+ if (gv && (cv = GvCV(gv))) {
+ const char *hvname;
if (GvNAMELEN(CvGV(cv)) == 3 && strEQ(GvNAME(CvGV(cv)), "nil")
- && strEQ(HvNAME(GvSTASH(CvGV(cv))), "overload")) {
+ && strEQ(hvname = HvNAME_get(GvSTASH(CvGV(cv))), "overload")) {
+ /* This is a hack to support autoloading..., while
+ knowing *which* methods were declared as overloaded. */
/* 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)),
+ GV *ngv = NULL;
+ SV *gvsv = GvSV(gv);
+
+ DEBUG_o( Perl_deb(aTHX_ "Resolving method \"%"SVf256\
+ "\" for overloaded \"%s\" in package \"%.256s\"\n",
+ (void*)GvSV(gv), cp, hvname) );
+ if (!gvsv || !SvPOK(gvsv)
+ || !(ngv = gv_fetchmethod_autoload(stash, SvPVX_const(gvsv),
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));
+ /* Can be an import stub (created by "can"). */
+ const char * const name = (gvsv && SvPOK(gvsv)) ? SvPVX_const(gvsv) : "???";
+ Perl_croak(aTHX_ "%s method \"%.256s\" overloading \"%s\" "\
+ "in package \"%.256s\"",
+ (GvCVGEN(gv) ? "Stub found while resolving"
+ : "Can't resolve"),
+ name, cp, hvname);
}
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))),
+ DEBUG_o( Perl_deb(aTHX_ "Overloading \"%s\" in package \"%.256s\" via \"%.256s::%.256s\"\n",
+ cp, HvNAME_get(stash), HvNAME_get(GvSTASH(CvGV(cv))),
GvNAME(CvGV(cv))) );
filled = 1;
+ if (i < DESTROY_amg)
+ have_ovl = 1;
+ } else if (gv) { /* Autoloaded... */
+ cv = (CV*)gv;
+ filled = 1;
}
-#endif
- amt.table[i]=(CV*)SvREFCNT_inc(cv);
+ amt.table[i]=(CV*)SvREFCNT_inc_simple(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)
+{
+ dVAR;
+ MAGIC *mg;
+ AMT *amtp;
+
+ if (!stash || !HvNAME_get(stash))
+ return NULL;
+ 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);
+ }
+ assert(mg);
+ 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)) {
+ CV * const ret = amtp->table[id];
+ if (ret && isGV(ret)) { /* Autoloading stab */
+ /* Passing it through may have resulted in a warning
+ "Inherited AUTOLOAD for a non-method deprecated", since
+ our caller is going through a function call, not a method call.
+ So return the CV for AUTOLOAD, setting $AUTOLOAD. */
+ GV * const gv = gv_fetchmethod(stash, PL_AMG_names[id]);
+
+ if (gv && GvCV(gv))
+ return GvCV(gv);
+ }
+ return ret;
+ }
+
+ return NULL;
+}
+
+
SV*
Perl_amagic_call(pTHX_ SV *left, SV *right, int method, int flags)
{
- dTHR;
- MAGIC *mg;
- CV *cv;
+ dVAR;
+ 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;
- int postpr = 0, force_cpy = 0, assignshift = assign ? 1 : 0;
- HV* stash;
+ AMT *amtp=NULL, *oamtp=NULL;
+ int off = 0, off1, lr = 0, notfound = 0;
+ int postpr = 0, force_cpy = 0;
+ int assign = AMGf_assign & flags;
+ const int assignshift = assign ? 1 : 0;
+#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])
+ : NULL))
+ && ((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) {
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 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 causes confusion with the interpreter variable of
* the same name
*/
- SV* tmpRef=SvRV(left);
+ SV* const 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);
+ SV* const newref = newSVsv(tmpRef);
SvOBJECT_on(newref);
- SvSTASH(newref) = (HV*)SvREFCNT_inc(SvSTASH(tmpRef));
+ SvSTASH_set(newref, (HV*)SvREFCNT_inc(SvSTASH(tmpRef)));
return newref;
}
}
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));
+ SV* const nullsv=sv_2mortal(newSViv(0));
if (off1==lt_amg) {
- SV* lessp = amagic_call(left,nullsv,
+ SV* const lessp = amagic_call(left,nullsv,
lt_amg,AMGf_noright);
logic = SvTRUE(lessp);
} else {
- SV* lessp = amagic_call(left,nullsv,
+ SV* const lessp = amagic_call(left,nullsv,
ncmp_amg,AMGf_noright);
logic = (SvNV(lessp) < 0);
}
}
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))
+ : 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
}
} 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])) {
} else {
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],
+ msg = sv_2mortal(Perl_newSVpvf(aTHX_
+ "Operation \"%s\": no method found,%sargument %s%s%s%s",
+ AMG_id2name(method + assignshift),
(flags & AMGf_unary ? " " : "\n\tleft "),
- SvAMAGIC(left)?
+ SvAMAGIC(left)?
"in overloaded package ":
"has no overloaded magic",
- SvAMAGIC(left)?
- HvNAME(SvSTASH(SvRV(left))):
+ SvAMAGIC(left)?
+ HvNAME_get(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)?
- HvNAME(SvSTASH(SvRV(right))):
+ SvAMAGIC(right)?
+ HvNAME_get(SvSTASH(SvRV(right))):
""));
if (amtp && amtp->fallback >= AMGfallYES) {
- DEBUG_o( Perl_deb(aTHX_ "%s", SvPVX(msg)) );
+ DEBUG_o( Perl_deb(aTHX_ "%s", SvPVX_const(msg)) );
} else {
- Perl_croak(aTHX_ "%_", msg);
+ Perl_croak(aTHX_ "%"SVf, (void*)msg);
}
return NULL;
}
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_get(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
* 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
dSP;
BINOP myop;
SV* res;
- bool oldcatch = CATCH_GET;
+ const bool oldcatch = CATCH_GET;
CATCH_SET(TRUE);
Zero(&myop, 1, BINOP);
myop.op_last = (OP *) &myop;
- myop.op_next = Nullop;
+ myop.op_next = NULL;
myop.op_flags = OPf_WANT_SCALAR | OPf_STACKED;
PUSHSTACKi(PERLSI_OVERLOAD);
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;
SvSetSV(left,res); return left;
case not_amg:
ans=!SvTRUE(res); break;
+ default:
+ ans=0; break;
}
return boolSV(ans);
} else if (method==copy_amg) {
}
}
}
+
+/*
+=for apidoc is_gv_magical_sv
+
+Returns C<TRUE> if given the name of a magical GV. Calls is_gv_magical.
+
+=cut
+*/
+
+bool
+Perl_is_gv_magical_sv(pTHX_ SV *name, U32 flags)
+{
+ STRLEN len;
+ const char * const temp = SvPV_const(name, len);
+ return is_gv_magical(temp, len, flags);
+}
+
+/*
+=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.
+
+Currently assumes that C<name> is NUL terminated (as well as len being valid).
+This assumption is met by all callers within the perl core, which all pass
+pointers returned by SvPV.
+
+=cut
+*/
+bool
+Perl_is_gv_magical(pTHX_ const char *name, STRLEN len, U32 flags)
+{
+ PERL_UNUSED_CONTEXT;
+ PERL_UNUSED_ARG(flags);
+
+ if (len > 1) {
+ const char * const name1 = name + 1;
+ switch (*name) {
+ case 'I':
+ if (len == 3 && name1[1] == 'S' && name[2] == 'A')
+ goto yes;
+ break;
+ case 'O':
+ if (len == 8 && strEQ(name1, "VERLOAD"))
+ goto yes;
+ break;
+ case 'S':
+ if (len == 3 && name[1] == 'I' && name[2] == 'G')
+ goto yes;
+ break;
+ /* Using ${^...} variables is likely to be sufficiently rare that
+ it seems sensible to avoid the space hit of also checking the
+ length. */
+ case '\017': /* ${^OPEN} */
+ if (strEQ(name1, "PEN"))
+ goto yes;
+ break;
+ case '\024': /* ${^TAINT} */
+ if (strEQ(name1, "AINT"))
+ goto yes;
+ break;
+ case '\025': /* ${^UNICODE} */
+ if (strEQ(name1, "NICODE"))
+ goto yes;
+ if (strEQ(name1, "TF8LOCALE"))
+ goto yes;
+ break;
+ case '\027': /* ${^WARNING_BITS} */
+ if (strEQ(name1, "ARNING_BITS"))
+ goto yes;
+ break;
+ case '1':
+ case '2':
+ case '3':
+ case '4':
+ case '5':
+ case '6':
+ case '7':
+ case '8':
+ case '9':
+ {
+ const char *end = name + len;
+ while (--end > name) {
+ if (!isDIGIT(*end))
+ return FALSE;
+ }
+ goto yes;
+ }
+ }
+ } else {
+ /* Because we're already assuming that name is NUL terminated
+ below, we can treat an empty name as "\0" */
+ switch (*name) {
+ 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 '\017': /* $^O */
+ case '\020': /* $^P */
+ case '\023': /* $^S */
+ case '\024': /* $^T */
+ case '\026': /* $^V */
+ case '\027': /* $^W */
+ case '1':
+ case '2':
+ case '3':
+ case '4':
+ case '5':
+ case '6':
+ case '7':
+ case '8':
+ case '9':
+ yes:
+ return TRUE;
+ default:
+ break;
+ }
+ }
+ return FALSE;
+}
+
+void
+Perl_gv_name_set(pTHX_ GV *gv, const char *name, U32 len, U32 flags)
+{
+ dVAR;
+ U32 hash;
+
+ assert(name);
+ PERL_UNUSED_ARG(flags);
+
+ if (len > I32_MAX)
+ Perl_croak(aTHX_ "panic: gv name too long (%"UVuf")", (UV) len);
+
+ if (!(flags & GV_ADD) && GvNAME_HEK(gv)) {
+ unshare_hek(GvNAME_HEK(gv));
+ }
+
+ PERL_HASH(hash, name, len);
+ GvNAME_HEK(gv) = share_hek(name, len, hash);
+}
+
+/*
+ * Local variables:
+ * c-indentation-style: bsd
+ * c-basic-offset: 4
+ * indent-tabs-mode: t
+ * End:
+ *
+ * ex: set ts=8 sts=4 sw=4 noet:
+ */
projects / p5sagit/p5-mst-13.2.git / blobdiff