-/* $RCSfile: gv.c,v $$Revision: 4.1 $$Date: 92/08/07 18:26:39 $
+/* gv.c
*
- * Copyright (c) 1991, 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.
*
- * $Log: gv.c,v $
- * Revision 4.1 92/08/07 18:26:39 lwall
- *
- * Revision 4.0.1.4 92/06/08 15:32:19 lwall
- * patch20: fixed confusion between a *var's real name and its effective name
- * patch20: the debugger now warns you on lines that can't set a breakpoint
- * patch20: the debugger made perl forget the last pattern used by //
- * patch20: paragraph mode now skips extra newlines automatically
- * patch20: ($<,$>) = ... didn't work on some architectures
- *
- * Revision 4.0.1.3 91/11/05 18:35:33 lwall
- * patch11: length($x) was sometimes wrong for numeric $x
- * patch11: perl now issues warning if $SIG{'ALARM'} is referenced
- * patch11: *foo = undef coredumped
- * patch11: solitary subroutine references no longer trigger typo warnings
- * patch11: local(*FILEHANDLE) had a memory leak
- *
- * Revision 4.0.1.2 91/06/07 11:55:53 lwall
- * patch4: new copyright notice
- * patch4: added $^P variable to control calling of perldb routines
- * patch4: added $^F variable to specify maximum system fd, default 2
- * patch4: $` was busted inside s///
- * patch4: default top-of-form run_format is now FILEHANDLE_TOP
- * patch4: length($`), length($&), length($') now optimized to avoid string copy
- * patch4: $^D |= 1024 now does syntax tree dump at run-time
- *
- * Revision 4.0.1.1 91/04/12 09:10:24 lwall
- * patch1: Configure now differentiates getgroups() type from getgid() type
- * patch1: you may now use "die" and "caller" in a signal handler
- *
- * Revision 4.0 91/03/20 01:39:41 lwall
- * 4.0 baseline.
- *
*/
+/*
+ * 'Mercy!' cried Gandalf. 'If the giving of information is to be the cure
+ * of your inquisitiveness, I shall spend all the rest of my days answering
+ * you. What more do you want to know?'
+ * 'The names of all the stars, and of all living things, and the whole
+ * history of Middle-earth and Over-heaven and of the Sundering Seas,'
+ * laughed Pippin.
+ */
+
+/*
+=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(72,0);
+ return gv;
+}
+#endif
+
GV *
-gv_AVadd(gv)
-register GV *gv;
+Perl_gv_AVadd(pTHX_ register GV *gv)
{
+ if (!gv || SvTYPE((SV*)gv) != SVt_PVGV)
+ Perl_croak(aTHX_ "Bad symbol for array");
if (!GvAV(gv))
GvAV(gv) = newAV();
return gv;
}
GV *
-gv_HVadd(gv)
-register GV *gv;
+Perl_gv_HVadd(pTHX_ register GV *gv)
{
+ if (!gv || SvTYPE((SV*)gv) != SVt_PVGV)
+ Perl_croak(aTHX_ "Bad symbol for hash");
if (!GvHV(gv))
- GvHV(gv) = newHV(COEFFSIZE);
+ GvHV(gv) = newHV();
return gv;
}
GV *
-gv_fetchfile(name)
-char *name;
+Perl_gv_IOadd(pTHX_ register GV *gv)
{
- char tmpbuf[1200];
+ 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 *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)
+{
+ dVAR;
+ char smallbuf[256];
+ char *tmpbuf;
+ STRLEN tmplen;
GV *gv;
- sprintf(tmpbuf,"'_<%s", name);
- gv = gv_fetchpv(tmpbuf, TRUE);
- sv_setpv(GvSV(gv), name);
- if (perldb)
- (void)gv_HVadd(gv_AVadd(gv));
+ if (!PL_defstash)
+ return Nullgv;
+
+ tmplen = strlen(name) + 2;
+ if (tmplen < sizeof smallbuf)
+ tmpbuf = smallbuf;
+ else
+ Newx(tmpbuf, tmplen + 1, char);
+ /* This is where the debugger's %{"::_<$filename"} hash is created */
+ tmpbuf[0] = '_';
+ tmpbuf[1] = '<';
+ memcpy(tmpbuf + 2, name, tmplen - 1);
+ gv = *(GV**)hv_fetch(PL_defstash, tmpbuf, tmplen, TRUE);
+ 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)), Nullgv, PERL_MAGIC_dbfile);
+ }
+ if (tmpbuf != smallbuf)
+ Safefree(tmpbuf);
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;
+}
+
+void
+Perl_gv_init(pTHX_ GV *gv, HV *stash, const char *name, STRLEN len, int multi)
+{
+ dVAR;
+ register GP *gp;
+ const bool doproto = SvTYPE(gv) > 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 (SvLEN(gv)) {
+ if (proto) {
+ SvPV_set(gv, NULL);
+ SvLEN_set(gv, 0);
+ SvPOK_off(gv);
+ } else
+ Safefree(SvPVX_mutable(gv));
+ }
+ Newxz(gp, 1, GP);
+ GvGP(gv) = gp_ref(gp);
+#ifdef PERL_DONT_CREATE_GVSV
+ GvSV(gv) = NULL;
+#else
+ GvSV(gv) = NEWSV(72,0);
+#endif
+ GvLINE(gv) = CopLINE(PL_curcop);
+ /* XXX Ideally this cast would be replaced with a change to const char*
+ in the struct. */
+ GvFILE(gv) = CopFILE(PL_curcop) ? CopFILE(PL_curcop) : (char *) "";
+ GvCVGEN(gv) = 0;
+ GvEGV(gv) = gv;
+ sv_magic((SV*)gv, (SV*)gv, PERL_MAGIC_glob, Nullch, 0);
+ GvSTASH(gv) = stash;
+ if (stash)
+ Perl_sv_add_backref(aTHX_ (SV*)stash, (SV*)gv);
+ GvNAME(gv) = savepvn(name, len);
+ GvNAMELEN(gv) = len;
+ if (multi || doproto) /* doproto means it _was_ mentioned */
+ GvMULTI_on(gv);
+ if (doproto) { /* Replicate part of newSUB here. */
+ SvIOK_off(gv);
+ ENTER;
+ 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;
+ CvFILE_set_from_cop(GvCV(gv), PL_curcop);
+ CvSTASH(GvCV(gv)) = PL_curstash;
+ if (proto) {
+ sv_setpv((SV*)GvCV(gv), proto);
+ Safefree(proto);
+ }
+ }
+}
+
+STATIC void
+S_gv_init_sv(pTHX_ GV *gv, I32 sv_type)
+{
+ switch (sv_type) {
+ case SVt_PVIO:
+ (void)GvIOn(gv);
+ break;
+ case SVt_PVAV:
+ (void)GvAVn(gv);
+ break;
+ case SVt_PVHV:
+ (void)GvHVn(gv);
+ break;
+#ifdef PERL_DONT_CREATE_GVSV
+ case SVt_NULL:
+ case SVt_PVCV:
+ case SVt_PVFM:
+ 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 *
-gv_fetchmethod(stash, name)
-HV* stash;
-char* name;
+Perl_gv_fetchmeth(pTHX_ HV *stash, const char *name, STRLEN len, I32 level)
{
+ dVAR;
AV* av;
+ GV* topgv;
GV* gv;
- GV** gvp = (GV**)hv_fetch(stash,name,strlen(name),FALSE);
- if (gvp && (gv = *gvp) != (GV*)&sv_undef && GvCV(gv))
- return 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 ((level > 100) || (level < -100))
+ Perl_croak(aTHX_ "Recursive inheritance detected while looking for method '%s' in package '%s'",
+ name, hvname);
+
+ 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;
+ 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) : NULL;
+
+ /* create and re-create @.*::SUPER::ISA on demand */
+ if (!av || !SvMAGIC(av)) {
+ STRLEN packlen = HvNAMELEN_get(stash);
+
+ if (packlen >= 7 && strEQ(hvname + packlen - 7, "::SUPER")) {
+ HV* basestash;
- gvp = (GV**)hv_fetch(stash,"ISA",3,FALSE);
- if (gvp && (gv = *gvp) != (GV*)&sv_undef && (av = GvAV(gv))) {
+ packlen -= 7;
+ basestash = gv_stashpvn(hvname, packlen, TRUE);
+ gvp = (GV**)hv_fetch(basestash, "ISA", 3, FALSE);
+ if (gvp && (gv = *gvp) != (GV*)&PL_sv_undef && (av = GvAV(gv))) {
+ gvp = (GV**)hv_fetch(stash, "ISA", 3, TRUE);
+ if (!gvp || !(gv = *gvp))
+ 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);
+ }
+ }
+ }
+
+ if (av) {
SV** svp = AvARRAY(av);
- I32 items = AvFILL(av) + 1;
+ /* NOTE: No support for tied ISA */
+ I32 items = AvFILLp(av) + 1;
while (items--) {
- char tmpbuf[512];
- SV* sv = *svp++;
- *tmpbuf = '_';
- SvUPGRADE(sv, SVt_PV);
- strcpy(tmpbuf+1,SvPVn(sv));
- gv = gv_fetchpv(tmpbuf,FALSE);
- if (!gv || !(stash = GvHV(gv))) {
- if (dowarn)
- warn("Can't locate package %s for @%s'ISA",
- SvPV(sv), HvNAME(stash));
+ SV* const sv = *svp++;
+ HV* const basestash = gv_stashsv(sv, FALSE);
+ if (!basestash) {
+ if (ckWARN(WARN_MISC))
+ Perl_warner(aTHX_ packWARN(WARN_MISC), "Can't locate package %"SVf" for @%s::ISA",
+ sv, hvname);
continue;
}
- gv = gv_fetchmethod(stash, name);
+ gv = gv_fetchmeth(basestash, name, len,
+ (level >= 0) ? level + 1 : level - 1);
if (gv)
+ goto gotcha;
+ }
+ }
+
+ /* if at top level, try UNIVERSAL */
+
+ if (level == 0 || level == -1) {
+ HV* const lastchance = gv_stashpvs("UNIVERSAL", FALSE);
+
+ if (lastchance) {
+ if ((gv = gv_fetchmeth(lastchance, name, len,
+ (level >= 0) ? level + 1 : level - 1)))
+ {
+ gotcha:
+ /*
+ * Cache method in topgv if:
+ * 1. topgv has no synonyms (else inheritance crosses wires)
+ * 2. method isn't a stub (else AUTOLOAD fails spectacularly)
+ */
+ if (topgv &&
+ GvREFCNT(topgv) == 1 &&
+ (cv = GvCV(gv)) &&
+ (CvROOT(cv) || CvXSUB(cv)))
+ {
+ if ((cv = GvCV(topgv)))
+ SvREFCNT_dec(cv);
+ GvCV(topgv) = (CV*)SvREFCNT_inc(GvCV(gv));
+ GvCVGEN(topgv) = PL_sub_generation;
+ }
return gv;
+ }
+ else if (topgv && GvREFCNT(topgv) == 1) {
+ /* cache the fact that the method is not defined */
+ GvCVGEN(topgv) = PL_sub_generation;
+ }
}
}
+
return 0;
}
+/*
+=for apidoc gv_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 *
-gv_fetchpv(name,add)
-register char *name;
-I32 add;
+Perl_gv_fetchmeth_autoload(pTHX_ HV *stash, const char *name, STRLEN len, I32 level)
{
- register GV *gv;
- GV**gvp;
- register GP *gp;
- I32 len;
- register char *namend;
- HV *stash;
- char *sawquote = Nullch;
- char *prevquote = Nullch;
- 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;
- }
- else if (*name == 'A' && (
- strEQ(name, "ARGV") ||
- strEQ(name, "ARGVOUT") ))
- global = TRUE;
+ GV *gv = gv_fetchmeth(stash, name, len, level);
+
+ if (!gv) {
+ CV *cv;
+ GV **gvp;
+
+ if (!stash)
+ return Nullgv; /* UNIVERSAL::AUTOLOAD could cause trouble */
+ if (len == S_autolen && strnEQ(name, S_autoload, S_autolen))
+ return Nullgv;
+ if (!(gv = gv_fetchmeth(stash, S_autoload, S_autolen, FALSE)))
+ return Nullgv;
+ cv = GvCV(gv);
+ if (!(CvROOT(cv) || CvXSUB(cv)))
+ return Nullgv;
+ /* 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 Nullgv;
+ return *gvp;
}
- for (namend = name; *namend; namend++) {
- if (*namend == '\'' && namend[1])
- prevquote = sawquote, sawquote = namend;
+ 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)
+{
+ dVAR;
+ register const char *nend;
+ 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;
+ else if (*nend == ':' && *(nend + 1) == ':')
+ nsplit = ++nend;
}
- if (sawquote == name && name[1]) {
- stash = defstash;
- sawquote = Nullch;
- name++;
+ if (nsplit) {
+ 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",
+ 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_get(stash), name) );
+ }
+ 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;
}
- else if (!isALPHA(*name) || global)
- stash = defstash;
- else if ((COP*)curcop == &compiling)
- stash = curstash;
- else
- stash = curcop->cop_stash;
- if (sawquote) {
- char tmpbuf[256];
- char *s, *d;
-
- *sawquote = '\0';
- /*SUPPRESS 560*/
- if (s = prevquote) {
- strncpy(tmpbuf,name,s-name+1);
- d = tmpbuf+(s-name+1);
- *d++ = '_';
- strcpy(d,s+1);
+
+ gv = gv_fetchmeth(stash, name, nend - name, 0);
+ if (!gv) {
+ if (strEQ(name,"import") || strEQ(name,"unimport"))
+ gv = (GV*)&PL_sv_yes;
+ else if (autoload)
+ gv = gv_autoload4(ostash, name, nend - name, TRUE);
+ }
+ else if (autoload) {
+ CV* const 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)
+{
+ dVAR;
+ GV* gv;
+ CV* cv;
+ HV* varstash;
+ GV* vargv;
+ SV* varsv;
+ const char *packname = "";
+ STRLEN packname_len;
+
+ if (len == S_autolen && strnEQ(name, S_autoload, S_autolen))
+ return Nullgv;
+ if (stash) {
+ if (SvTYPE(stash) < SVt_PVHV) {
+ packname = SvPV_const((SV*)stash, packname_len);
+ stash = NULL;
}
else {
- *tmpbuf = '_';
- strcpy(tmpbuf+1,name);
+ packname = HvNAME_get(stash);
+ packname_len = HvNAMELEN_get(stash);
+ }
+ }
+ if (!(gv = gv_fetchmeth(stash, S_autoload, S_autolen, FALSE)))
+ return Nullgv;
+ cv = GvCV(gv);
+
+ if (!(CvROOT(cv) || CvXSUB(cv)))
+ return Nullgv;
+
+ /*
+ * Inheriting AUTOLOAD for non-methods works ... for now.
+ */
+ 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",
+ packname, (int)len, name);
+
+ if (CvXSUB(cv)) {
+ /* rather than lookup/init $AUTOLOAD here
+ * only to have the XSUB do another lookup for $AUTOLOAD
+ * and split that value on the last '::',
+ * pass along the same data via some unused fields in the CV
+ */
+ CvSTASH(cv) = stash;
+ 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.
+ * 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, 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(72,0);
+#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"), Nullsv);
+ 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[128];
+ char *tmpbuf;
+ HV *stash;
+ GV *tmpgv;
+
+ if (namelen + 3 < sizeof smallbuf)
+ tmpbuf = smallbuf;
+ else
+ Newx(tmpbuf, namelen + 3, char);
+ Copy(name,tmpbuf,namelen,char);
+ tmpbuf[namelen++] = ':';
+ tmpbuf[namelen++] = ':';
+ tmpbuf[namelen] = '\0';
+ tmpgv = gv_fetchpvn_flags(tmpbuf, namelen, create, SVt_PVHV);
+ if (tmpbuf != smallbuf)
+ Safefree(tmpbuf);
+ if (!tmpgv)
+ return 0;
+ if (!GvHV(tmpgv))
+ GvHV(tmpgv) = newHV();
+ stash = GvHV(tmpgv);
+ 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)
+{
+ STRLEN 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) {
+ 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)
+{
+ dVAR;
+ register const char *name = nambeg;
+ register GV *gv = NULL;
+ GV**gvp;
+ I32 len;
+ register const char *namend;
+ 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;
+
+ PERL_UNUSED_ARG(full_len);
+
+ if (*name == '*' && isALPHA(name[1])) /* accidental stringify on a GV? */
+ name++;
+
+ for (namend = name; *namend; namend++) {
+ if ((*namend == ':' && namend[1] == ':')
+ || (*namend == '\'' && namend[1]))
+ {
+ if (!stash)
+ stash = PL_defstash;
+ if (!stash || !SvREFCNT(stash)) /* symbol table under destruction */
+ return Nullgv;
+
+ len = namend - name;
+ if (len > 0) {
+ char smallbuf[128];
+ char *tmpbuf;
+
+ if (len + 3 < sizeof (smallbuf))
+ tmpbuf = smallbuf;
+ else
+ 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;
+ if (gv && gv != (GV*)&PL_sv_undef) {
+ if (SvTYPE(gv) != SVt_PVGV)
+ gv_init(gv, stash, tmpbuf, len, (add & GV_ADDMULTI));
+ else
+ GvMULTI_on(gv);
+ }
+ if (tmpbuf != smallbuf)
+ Safefree(tmpbuf);
+ if (!gv || gv == (GV*)&PL_sv_undef)
+ return Nullgv;
+
+ if (!(stash = GvHV(gv)))
+ stash = GvHV(gv) = newHV();
+
+ if (!HvNAME_get(stash))
+ hv_name_set(stash, nambeg, namend - nambeg, 0);
+ }
+
+ if (*namend == ':')
+ namend++;
+ namend++;
+ name = namend;
+ if (!*name)
+ return gv ? gv : (GV*)*hv_fetch(PL_defstash, "main::", 6, TRUE);
}
- gv = gv_fetchpv(tmpbuf,TRUE);
- if (!(stash = GvHV(gv)))
- stash = GvHV(gv) = newHV(0);
- if (!HvNAME(stash))
- HvNAME(stash) = savestr(name);
- name = sawquote+1;
- *sawquote = '\'';
}
len = namend - name;
+
+ /* No stash in name, so see how we can default */
+
+ if (!stash) {
+ if (isIDFIRST_lazy(name)) {
+ bool global = FALSE;
+
+ /* name is always \0 terminated, and initial \0 wouldn't return
+ true from isIDFIRST_lazy, so we know that name[1] is defined */
+ switch (name[1]) {
+ case '\0':
+ if (*name == '_')
+ global = TRUE;
+ break;
+ case 'N':
+ if (strEQ(name, "INC") || strEQ(name, "ENV"))
+ global = TRUE;
+ break;
+ case 'I':
+ if (strEQ(name, "SIG"))
+ global = TRUE;
+ break;
+ case 'T':
+ if (strEQ(name, "STDIN") || strEQ(name, "STDOUT") ||
+ strEQ(name, "STDERR"))
+ global = TRUE;
+ break;
+ case 'R':
+ if (strEQ(name, "ARGV") || strEQ(name, "ARGVOUT"))
+ global = TRUE;
+ break;
+ }
+
+ if (global)
+ stash = PL_defstash;
+ 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 &&
+ (*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;
+ }
+ else if ((sv_type == SVt_PV && !GvIMPORTED_SV(*gvp)) ||
+ (sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp)) ||
+ (sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp)) )
+ {
+ Perl_warn(aTHX_ "Variable \"%c%s\" is not imported",
+ sv_type == SVt_PVAV ? '@' :
+ sv_type == SVt_PVHV ? '%' : '$',
+ name);
+ if (GvCVu(*gvp))
+ Perl_warn(aTHX_ "\t(Did you mean &%s instead?)\n", name);
+ stash = 0;
+ }
+ }
+ }
+ else
+ stash = CopSTASH(PL_curcop);
+ }
+ else
+ stash = PL_defstash;
+ }
+
+ /* By this point we should have a stash and a name */
+
+ if (!stash) {
+ if (add) {
+ 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));
+ }
+ else
+ return Nullgv;
+ }
+
+ if (!SvREFCNT(stash)) /* symbol table under destruction */
+ 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) {
- SvMULTI_on(gv);
+ 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 {
- sv_upgrade(gv, SVt_PVGV);
- if (SvLEN(gv))
- Safefree(SvPV(gv));
- Newz(602,gp, 1, GP);
- GvGP(gv) = gp;
- GvREFCNT(gv) = 1;
- GvSV(gv) = NEWSV(72,0);
- GvLINE(gv) = curcop->cop_line;
- GvEGV(gv) = gv;
- sv_magic((SV*)gv, (SV*)gv, '*', name, len);
- GvSTASH(gv) = stash;
- GvNAME(gv) = nsavestr(name, len);
- GvNAMELEN(gv) = len;
- if (isDIGIT(*name) && *name != '0')
- sv_magic(GvSV(gv), (SV*)gv, 0, name, len);
- if (add & 2)
- SvMULTI_on(gv);
+ } 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_ packWARN(WARN_INTERNAL), "Had to create %s unexpectedly", nambeg);
+ gv_init(gv, stash, name, len, add & GV_ADDMULTI);
+ gv_init_sv(gv, sv_type);
+
+ if (isALPHA(name[0]) && ! (isLEXWARN_on ? ckWARN(WARN_ONCE)
+ : (PL_dowarn & G_WARN_ON ) ) )
+ GvMULTI_on(gv) ;
+
+ /* set up magic where warranted */
+ if (len > 1) {
+#ifndef EBCDIC
+ if (*name > 'V' ) {
+ /* 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, Nullch, 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, Nullgv, 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, Nullgv, 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;
+ 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':
+ {
+ /* ensures variable is only digits */
+ /* ${"1foo"} fails this test (and is thus writeable) */
+ /* added by japhy, but borrowed from is_gv_magical */
+ const char *end = name + len;
+ while (--end > name) {
+ if (!isDIGIT(*end)) return gv;
+ }
+ goto ro_magicalize;
+ }
+ }
+ }
+ } else {
+ /* Names of length 1. (Or 0. But name is NUL terminated, so that will
+ be case '\0' in this switch statement (ie a default case) */
+ switch (*name) {
+ case '&':
+ case '`':
+ case '\'':
+ if (
+ sv_type == SVt_PVAV ||
+ sv_type == SVt_PVHV ||
+ sv_type == SVt_PVCV ||
+ sv_type == SVt_PVFM ||
+ sv_type == SVt_PVIO
+ ) { break; }
+ PL_sawampersand = TRUE;
+ goto ro_magicalize;
+
+ case ':':
+ sv_setpv(GvSVn(gv),PL_chopset);
+ goto magicalize;
+
+ case '?':
+#ifdef COMPLEX_STATUS
+ SvUPGRADE(GvSVn(gv), SVt_PVLV);
+#endif
+ goto magicalize;
+
+ case '!':
+
+ /* If %! has been used, automatically load Errno.pm.
+ The require will itself set errno, so in order to
+ preserve its value we have to set up the magic
+ now (rather than going to magicalize)
+ */
+
+ sv_magic(GvSVn(gv), (SV*)gv, PERL_MAGIC_sv, name, len);
+
+ if (sv_type == SVt_PVHV)
+ require_errno(gv);
+
+ break;
+ case '-':
+ {
+ AV* const av = GvAVn(gv);
+ sv_magic((SV*)av, Nullsv, PERL_MAGIC_regdata, Nullch, 0);
+ SvREADONLY_on(av);
+ goto magicalize;
+ }
+ case '*':
+ case '#':
+ if (sv_type == SVt_PV && ckWARN2(WARN_DEPRECATED, WARN_SYNTAX))
+ Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX),
+ "$%c is no longer supported", *name);
+ break;
+ case '|':
+ sv_setiv(GvSVn(gv), (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0);
+ goto magicalize;
+
+ case '+':
+ {
+ AV* const av = GvAVn(gv);
+ sv_magic((SV*)av, (SV*)av, PERL_MAGIC_regdata, Nullch, 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 '\010': /* $^H */
+ 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;
+
+ case '\014': /* $^L */
+ sv_setpvn(GvSVn(gv),"\f",1);
+ PL_formfeed = GvSVn(gv);
+ break;
+ case ';':
+ sv_setpvn(GvSVn(gv),"\034",1);
+ break;
+ 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 '\026': /* $^V */
+ {
+ SV * const sv = GvSVn(gv);
+ GvSV(gv) = new_version(PL_patchlevel);
+ SvREADONLY_on(GvSV(gv));
+ SvREFCNT_dec(sv);
+ }
+ break;
+ }
}
+ return gv;
}
void
-gv_fullname(sv,gv)
-SV *sv;
-GV *gv;
+Perl_gv_fullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain)
{
- HV *hv = GvSTASH(gv);
-
- if (!hv)
+ const char *name;
+ STRLEN namelen;
+ const HV * const hv = GvSTASH(gv);
+ if (!hv) {
+ SvOK_off(sv);
return;
- sv_setpv(sv, sv == (SV*)gv ? "*" : "");
- sv_catpv(sv,HvNAME(hv));
- sv_catpvn(sv,"'", 1);
+ }
+ sv_setpv(sv, prefix ? prefix : "");
+
+ name = HvNAME_get(hv);
+ if (name) {
+ namelen = HvNAMELEN_get(hv);
+ } else {
+ name = "__ANON__";
+ namelen = 8;
+ }
+
+ if (keepmain || strNE(name, "main")) {
+ sv_catpvn(sv,name,namelen);
+ sv_catpvs(sv,"::");
+ }
sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv));
}
void
-gv_efullname(sv,gv)
-SV *sv;
-GV *gv;
+Perl_gv_efullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain)
{
- GV* egv = GvEGV(gv);
- HV *hv = GvSTASH(egv);
-
- if (!hv)
- return;
- sv_setpv(sv, sv == (SV*)gv ? "*" : "");
- sv_catpv(sv,HvNAME(hv));
- sv_catpvn(sv,"'", 1);
- sv_catpvn(sv,GvNAME(egv),GvNAMELEN(egv));
+ const GV * const egv = GvEGV(gv);
+ gv_fullname4(sv, egv ? egv : gv, prefix, keepmain);
}
IO *
-newIO()
+Perl_newIO(pTHX)
{
- IO *io;
+ dVAR;
+ GV *iogv;
+ IO * const io = (IO*)NEWSV(0,0);
- Newz(603,io,1,IO);
- io->page_len = 60;
+ sv_upgrade((SV *)io,SVt_PVIO);
+ /* This used to read SvREFCNT(io) = 1;
+ It's not clear why the reference count needed an explicit reset. NWC
+ */
+ assert (SvREFCNT(io) == 1);
+ SvOBJECT_on(io);
+ /* Clear the stashcache because a new IO could overrule a package name */
+ hv_clear(PL_stashcache);
+ iogv = gv_fetchpvn_flags("FileHandle::", 12, 0, SVt_PVHV);
+ /* unless exists($main::{FileHandle}) and defined(%main::FileHandle::) */
+ if (!(iogv && GvHV(iogv) && HvARRAY(GvHV(iogv))))
+ iogv = gv_fetchpvn_flags("IO::Handle::", 12, TRUE, SVt_PVHV);
+ SvSTASH_set(io, (HV*)SvREFCNT_inc(GvHV(iogv)));
return io;
}
void
-gv_check(min,max)
-I32 min;
-register I32 max;
+Perl_gv_check(pTHX_ HV *stash)
{
- register HE *entry;
+ dVAR;
register I32 i;
- register GV *gv;
- for (i = min; i <= max; i++) {
- for (entry = HvARRAY(defstash)[i]; entry; entry = entry->hent_next) {
- gv = (GV*)entry->hent_val;
- if (SvMULTI(gv))
- continue;
- curcop->cop_line = GvLINE(gv);
- warn("Possible typo: \"%s\"", GvNAME(gv));
+ 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)) && 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;
+ 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;
+ }
+ 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_get(stash), GvNAME(gv));
+ }
}
}
}
GV *
-newGVgen()
+Perl_newGVgen(pTHX_ const char *pack)
{
- (void)sprintf(tokenbuf,"_GEN_%d",gensym++);
- return gv_fetchpv(tokenbuf,TRUE);
+ dVAR;
+ 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)
{
+ dVAR;
+ 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;
+ dVAR;
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_ packWARN(WARN_INTERNAL),
+ "Attempt to free unreferenced glob pointers"
+ pTHX__FORMAT pTHX__VALUE);
return;
}
- if (--gp->gp_refcnt > 0)
+ 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;
return;
+ }
+
+ if (gp->gp_sv) SvREFCNT_dec(gp->gp_sv);
+ if (gp->gp_av) SvREFCNT_dec(gp->gp_av);
+ /* 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);
+ }
+ if (gp->gp_io) SvREFCNT_dec(gp->gp_io);
+ if (gp->gp_cv) SvREFCNT_dec(gp->gp_cv);
+ if (gp->gp_form) SvREFCNT_dec(gp->gp_form);
- sv_free(gp->gp_sv);
- sv_free(gp->gp_av);
- sv_free(gp->gp_hv);
- if (io = gp->gp_io) {
- do_close(gv,FALSE);
- Safefree(io->top_name);
- Safefree(io->fmt_name);
- Safefree(io);
- }
- if (cv = gp->gp_cv)
- sv_free(cv);
Safefree(gp);
GvGP(gv) = 0;
}
-#if defined(CRIPPLED_CC) && (defined(iAPX286) || defined(M_I286) || defined(I80286))
-#define MICROPORT
-#endif
+int
+Perl_magic_freeovrld(pTHX_ SV *sv, MAGIC *mg)
+{
+ 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 != Nullcv) {
+ SvREFCNT_dec((SV *) cv);
+ amtp->table[i] = Nullcv;
+ }
+ }
+ }
+ return 0;
+}
-#ifdef MICROPORT /* Microport 2.4 hack */
-AV *GvAVn(gv)
-register GV *gv;
+/* Updates and caches the CV's */
+
+bool
+Perl_Gv_AMupdate(pTHX_ HV *stash)
{
- if (GvGP(gv)->gp_av)
- return GvGP(gv)->gp_av;
- else
- return GvGP(gv_AVadd(gv))->gp_av;
+ dVAR;
+ MAGIC* const mg = mg_find((SV*)stash, PERL_MAGIC_overload_table);
+ AMT * const amtp = (mg) ? (AMT*)mg->mg_ptr: (AMT *) NULL;
+ AMT amt;
+
+ if (mg && 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);
+
+ 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;
+
+ {
+ int filled = 0, have_ovl = 0;
+ int i, lim = 1;
+
+ /* Work with "fallback" key, which we assume to be first in PL_AMG_names */
+
+ /* 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)
+ lim = DESTROY_amg; /* Skip overloading entries. */
+#ifdef PERL_DONT_CREATE_GVSV
+ else if (!sv) {
+ /* Equivalent to !SvTRUE and !SvOK */
+ }
+#endif
+ else if (SvTRUE(sv))
+ amt.fallback=AMGfallYES;
+ else if (SvOK(sv))
+ amt.fallback=AMGfallNEVER;
+
+ for (i = 1; i < lim; i++)
+ amt.table[i] = Nullcv;
+ for (; i < NofAMmeth; i++) {
+ const char *cooky = PL_AMG_names[i];
+ /* Human-readable form, for debugging: */
+ const char *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))) {
+ const char *hvname;
+ if (GvNAMELEN(CvGV(cv)) == 3 && strEQ(GvNAME(CvGV(cv)), "nil")
+ && 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 = Nullgv;
+ SV *gvsv = GvSV(gv);
+
+ DEBUG_o( Perl_deb(aTHX_ "Resolving method \"%"SVf256\
+ "\" for overloaded \"%s\" in package \"%.256s\"\n",
+ 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"). */
+ 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_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;
+ }
+ amt.table[i]=(CV*)SvREFCNT_inc(cv);
+ }
+ if (filled) {
+ AMT_AMAGIC_on(&amt);
+ 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: */
+ AMT_AMAGIC_off(&amt);
+ sv_magic((SV*)stash, 0, PERL_MAGIC_overload_table,
+ (char*)&amt, sizeof(AMTS));
+ return FALSE;
}
-HV *GvHVn(gv)
-register GV *gv;
+
+CV*
+Perl_gv_handler(pTHX_ HV *stash, I32 id)
{
- if (GvGP(gv)->gp_hv)
- return GvGP(gv)->gp_hv;
- else
- return GvGP(gv_HVadd(gv))->gp_hv;
+ dVAR;
+ MAGIC *mg;
+ AMT *amtp;
+
+ if (!stash || !HvNAME_get(stash))
+ return Nullcv;
+ mg = mg_find((SV*)stash, PERL_MAGIC_overload_table);
+ if (!mg) {
+ do_update:
+ Gv_AMupdate(stash);
+ mg = mg_find((SV*)stash, PERL_MAGIC_overload_table);
+ }
+ amtp = (AMT*)mg->mg_ptr;
+ if ( amtp->was_ok_am != PL_amagic_generation
+ || amtp->was_ok_sub != PL_sub_generation )
+ goto do_update;
+ if (AMT_AMAGIC(amtp)) {
+ 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 Nullcv;
}
-#endif /* Microport 2.4 hack */
-GV *
-fetch_gv(op,num)
-OP *op;
-I32 num;
+
+SV*
+Perl_amagic_call(pTHX_ SV *left, SV *right, int method, int flags)
{
- if (op->op_private < num)
- return 0;
- if (op->op_flags & OPf_STACKED)
- return gv_fetchpv(SvPVnx(*(stack_sp--)),TRUE);
- else
- return cGVOP->op_gv;
+ dVAR;
+ MAGIC *mg;
+ CV *cv=NULL;
+ CV **cvp=NULL, **ocvp=NULL;
+ 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)
+ && (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])
+ || (assign && amtp->fallback > AMGfallNEVER && /* fallback to
+ * usual 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) {
+ int logic;
+
+ /* look for substituted methods */
+ /* In all the covered cases we should be called with assign==0. */
+ switch (method) {
+ case inc_amg:
+ 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:
+ 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:
+ (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg]));
+ break;
+ case numer_amg:
+ (void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg]));
+ break;
+ 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 causes confusion with the interpreter variable of
+ * the same name
+ */
+ 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* const newref = newSVsv(tmpRef);
+ SvOBJECT_on(newref);
+ SvSTASH_set(newref, (HV*)SvREFCNT_inc(SvSTASH(tmpRef)));
+ return newref;
+ }
+ }
+ break;
+ case abs_amg:
+ if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg])
+ && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) {
+ SV* const nullsv=sv_2mortal(newSViv(0));
+ if (off1==lt_amg) {
+ SV* const lessp = amagic_call(left,nullsv,
+ lt_amg,AMGf_noright);
+ logic = SvTRUE(lessp);
+ } else {
+ SV* const lessp = amagic_call(left,nullsv,
+ ncmp_amg,AMGf_noright);
+ logic = (SvNV(lessp) < 0);
+ }
+ if (logic) {
+ if (off==subtr_amg) {
+ right = left;
+ left = nullsv;
+ lr = 1;
+ }
+ } else {
+ return left;
+ }
+ }
+ break;
+ case neg_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 left; /* Delegate operation to standard mechanisms. */
+ break;
+ default:
+ goto not_found;
+ }
+ if (!cv) goto not_found;
+ } else if (!(AMGf_noright & flags) && SvAMAGIC(right)
+ && (stash = SvSTASH(SvRV(right)))
+ && (mg = mg_find((SV*)stash, PERL_MAGIC_overload_table))
+ && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr)
+ ? (amtp = (AMT*)mg->mg_ptr)->table
+ : (CV **) NULL))
+ && (cv = cvp[off=method])) { /* Method for right
+ * argument found */
+ lr=1;
+ } else if (((ocvp && oamtp->fallback > AMGfallNEVER
+ && (cvp=ocvp) && (lr = -1))
+ || (cvp && amtp->fallback > AMGfallNEVER && (lr=1)))
+ && !(flags & AMGf_unary)) {
+ /* We look for substitution for
+ * comparison operations and
+ * concatenation */
+ if (method==concat_amg || method==concat_ass_amg
+ || method==repeat_amg || method==repeat_ass_amg) {
+ return NULL; /* Delegate operation to string conversion */
+ }
+ off = -1;
+ switch (method) {
+ case lt_amg:
+ case le_amg:
+ case gt_amg:
+ case ge_amg:
+ case eq_amg:
+ case ne_amg:
+ postpr = 1; off=ncmp_amg; break;
+ case slt_amg:
+ case sle_amg:
+ case sgt_amg:
+ case sge_amg:
+ case seq_amg:
+ case sne_amg:
+ postpr = 1; off=scmp_amg; break;
+ }
+ if (off != -1) cv = cvp[off];
+ if (!cv) {
+ goto not_found;
+ }
+ } 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])) {
+ notfound = 1; lr = 1;
+ } else {
+ SV *msg;
+ if (off==-1) off=method;
+ 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)?
+ "in overloaded package ":
+ "has no overloaded magic",
+ SvAMAGIC(left)?
+ HvNAME_get(SvSTASH(SvRV(left))):
+ "",
+ SvAMAGIC(right)?
+ ",\n\tright argument in overloaded package ":
+ (flags & AMGf_unary
+ ? ""
+ : ",\n\tright argument has no overloaded magic"),
+ SvAMAGIC(right)?
+ HvNAME_get(SvSTASH(SvRV(right))):
+ ""));
+ if (amtp && amtp->fallback >= AMGfallYES) {
+ DEBUG_o( Perl_deb(aTHX_ "%s", SvPVX_const(msg)) );
+ } else {
+ Perl_croak(aTHX_ "%"SVf, 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",
+ 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
+ */
+ /* 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;
+ const bool oldcatch = CATCH_GET;
+
+ CATCH_SET(TRUE);
+ Zero(&myop, 1, BINOP);
+ myop.op_last = (OP *) &myop;
+ myop.op_next = Nullop;
+ myop.op_flags = OPf_WANT_SCALAR | OPf_STACKED;
+
+ PUSHSTACKi(PERLSI_OVERLOAD);
+ ENTER;
+ 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);
+ PUSHs(lr>0? right: left);
+ PUSHs(lr>0? left: right);
+ PUSHs( lr > 0 ? &PL_sv_yes : ( assign ? &PL_sv_undef : &PL_sv_no ));
+ if (notfound) {
+ PUSHs( sv_2mortal(newSVpv(AMG_id2name(method + assignshift),0)));
+ }
+ PUSHs((SV*)cv);
+ PUTBACK;
+
+ if ((PL_op = Perl_pp_entersub(aTHX)))
+ CALLRUNOPS(aTHX);
+ LEAVE;
+ SPAGAIN;
+
+ res=POPs;
+ PUTBACK;
+ POPSTACK;
+ CATCH_SET(oldcatch);
+
+ if (postpr) {
+ int ans;
+ switch (method) {
+ case le_amg:
+ case sle_amg:
+ ans=SvIV(res)<=0; break;
+ case lt_amg:
+ case slt_amg:
+ ans=SvIV(res)<0; break;
+ case ge_amg:
+ case sge_amg:
+ ans=SvIV(res)>=0; break;
+ case gt_amg:
+ case sgt_amg:
+ ans=SvIV(res)>0; break;
+ case eq_amg:
+ case seq_amg:
+ ans=SvIV(res)==0; break;
+ case ne_amg:
+ case sne_amg:
+ ans=SvIV(res)!=0; break;
+ case inc_amg:
+ case dec_amg:
+ SvSetSV(left,res); return left;
+ case not_amg:
+ ans=!SvTRUE(res); break;
+ default:
+ ans=0; break;
+ }
+ return boolSV(ans);
+ } else if (method==copy_amg) {
+ if (!SvROK(res)) {
+ Perl_croak(aTHX_ "Copy method did not return a reference");
+ }
+ return SvREFCNT_inc(SvRV(res));
+ } else {
+ return res;
+ }
+ }
}
-IO *
-fetch_io(op,num)
-OP *op;
-I32 num;
+/*
+=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)
{
- GV *gv;
+ STRLEN len;
+ const char * const temp = SvPV_const(name, len);
+ return is_gv_magical(temp, len, flags);
+}
- if (op->op_private < num)
- return 0;
- if (op->op_flags & OPf_STACKED)
- gv = gv_fetchpv(SvPVnx(*(stack_sp--)),TRUE);
- else
- gv = cGVOP->op_gv;
+/*
+=for apidoc is_gv_magical
- if (!gv)
- return 0;
+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.
- return GvIOn(gv);
+=cut
+*/
+bool
+Perl_is_gv_magical(pTHX_ const char *name, STRLEN len, U32 flags)
+{
+ 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;
}
+
+/*
+ * 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