+/* universal.c
+ *
+ * Copyright (c) 1997-2003, Larry Wall
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Artistic License, as specified in the README file.
+ *
+ */
+
+/*
+ * "The roots of those mountains must be roots indeed; there must be
+ * great secrets buried there which have not been discovered since the
+ * beginning." --Gandalf, relating Gollum's story
+ */
+
#include "EXTERN.h"
#define PERL_IN_UNIVERSAL_C
#include "perl.h"
+#ifdef USE_PERLIO
+#include "perliol.h" /* For the PERLIO_F_XXX */
+#endif
+
/*
* Contributed by Graham Barr <Graham.Barr@tiuk.ti.com>
* The main guts of traverse_isa was actually copied from gv_fetchmeth
*/
STATIC SV *
-S_isa_lookup(pTHX_ HV *stash, const char *name, int len, int level)
+S_isa_lookup(pTHX_ HV *stash, const char *name, HV* name_stash,
+ int len, int level)
{
AV* av;
GV* gv;
GV** gvp;
HV* hv = Nullhv;
+ SV* subgen = Nullsv;
- if (!stash)
- return &PL_sv_undef;
+ /* A stash/class can go by many names (ie. User == main::User), so
+ we compare the stash itself just in case */
+ if (name_stash && (stash == name_stash))
+ return &PL_sv_yes;
- if(strEQ(HvNAME(stash), name))
+ if (strEQ(HvNAME(stash), name))
return &PL_sv_yes;
if (level > 100)
- Perl_croak(aTHX_ "Recursive inheritance detected in package '%s'", HvNAME(stash));
+ Perl_croak(aTHX_ "Recursive inheritance detected in package '%s'",
+ HvNAME(stash));
gvp = (GV**)hv_fetch(stash, "::ISA::CACHE::", 14, FALSE);
- if (gvp && (gv = *gvp) != (GV*)&PL_sv_undef && (hv = GvHV(gv))) {
- SV* sv;
- SV** svp = (SV**)hv_fetch(hv, name, len, FALSE);
- if (svp && (sv = *svp) != (SV*)&PL_sv_undef)
- return sv;
+ if (gvp && (gv = *gvp) != (GV*)&PL_sv_undef && (subgen = GvSV(gv))
+ && (hv = GvHV(gv)))
+ {
+ if (SvIV(subgen) == (IV)PL_sub_generation) {
+ SV* sv;
+ SV** svp = (SV**)hv_fetch(hv, name, len, FALSE);
+ if (svp && (sv = *svp) != (SV*)&PL_sv_undef) {
+ DEBUG_o( Perl_deb(aTHX_ "Using cached ISA %s for package %s\n",
+ name, HvNAME(stash)) );
+ return sv;
+ }
+ }
+ else {
+ DEBUG_o( Perl_deb(aTHX_ "ISA Cache in package %s is stale\n",
+ HvNAME(stash)) );
+ hv_clear(hv);
+ sv_setiv(subgen, PL_sub_generation);
+ }
}
gvp = (GV**)hv_fetch(stash,"ISA",3,FALSE);
-
+
if (gvp && (gv = *gvp) != (GV*)&PL_sv_undef && (av = GvAV(gv))) {
- if(!hv) {
+ if (!hv || !subgen) {
gvp = (GV**)hv_fetch(stash, "::ISA::CACHE::", 14, TRUE);
gv = *gvp;
if (SvTYPE(gv) != SVt_PVGV)
gv_init(gv, stash, "::ISA::CACHE::", 14, TRUE);
- hv = GvHVn(gv);
+ if (!hv)
+ hv = GvHVn(gv);
+ if (!subgen) {
+ subgen = newSViv(PL_sub_generation);
+ GvSV(gv) = subgen;
+ }
}
- if(hv) {
+ if (hv) {
SV** svp = AvARRAY(av);
/* NOTE: No support for tied ISA */
I32 items = AvFILLp(av) + 1;
SV* sv = *svp++;
HV* basestash = gv_stashsv(sv, FALSE);
if (!basestash) {
- dTHR;
if (ckWARN(WARN_MISC))
- Perl_warner(aTHX_ WARN_SYNTAX,
- "Can't locate package %s for @%s::ISA",
- SvPVX(sv), HvNAME(stash));
+ Perl_warner(aTHX_ packWARN(WARN_SYNTAX),
+ "Can't locate package %"SVf" for @%s::ISA",
+ sv, HvNAME(stash));
continue;
}
- if(&PL_sv_yes == isa_lookup(basestash, name, len, level + 1)) {
+ if (&PL_sv_yes == isa_lookup(basestash, name, name_stash,
+ len, level + 1)) {
(void)hv_store(hv,name,len,&PL_sv_yes,0);
return &PL_sv_yes;
}
}
/*
+=head1 SV Manipulation Functions
+
=for apidoc sv_derived_from
Returns a boolean indicating whether the SV is derived from the specified
bool
Perl_sv_derived_from(pTHX_ SV *sv, const char *name)
{
- SV *rv;
char *type;
HV *stash;
-
+ HV *name_stash;
+
stash = Nullhv;
type = Nullch;
-
+
if (SvGMAGICAL(sv))
mg_get(sv) ;
if (SvROK(sv)) {
sv = SvRV(sv);
type = sv_reftype(sv,0);
- if(SvOBJECT(sv))
+ if (SvOBJECT(sv))
stash = SvSTASH(sv);
}
else {
stash = gv_stashsv(sv, FALSE);
}
-
+
+ name_stash = gv_stashpv(name, FALSE);
+
return (type && strEQ(type,name)) ||
- (stash && isa_lookup(stash, name, strlen(name), 0) == &PL_sv_yes)
+ (stash && isa_lookup(stash, name, name_stash, strlen(name), 0)
+ == &PL_sv_yes)
? TRUE
: FALSE ;
-
}
-void XS_UNIVERSAL_isa(pTHXo_ CV *cv);
-void XS_UNIVERSAL_can(pTHXo_ CV *cv);
-void XS_UNIVERSAL_VERSION(pTHXo_ CV *cv);
+#include "XSUB.h"
+
+void XS_UNIVERSAL_isa(pTHX_ CV *cv);
+void XS_UNIVERSAL_can(pTHX_ CV *cv);
+void XS_UNIVERSAL_VERSION(pTHX_ CV *cv);
+XS(XS_version_new);
+XS(XS_version_stringify);
+XS(XS_version_numify);
+XS(XS_version_vcmp);
+XS(XS_version_boolean);
+XS(XS_version_noop);
+XS(XS_utf8_valid);
+XS(XS_utf8_encode);
+XS(XS_utf8_decode);
+XS(XS_utf8_upgrade);
+XS(XS_utf8_downgrade);
+XS(XS_utf8_unicode_to_native);
+XS(XS_utf8_native_to_unicode);
+XS(XS_Internals_SvREADONLY);
+XS(XS_Internals_SvREFCNT);
+XS(XS_Internals_hv_clear_placehold);
+XS(XS_PerlIO_get_layers);
void
Perl_boot_core_UNIVERSAL(pTHX)
newXS("UNIVERSAL::isa", XS_UNIVERSAL_isa, file);
newXS("UNIVERSAL::can", XS_UNIVERSAL_can, file);
newXS("UNIVERSAL::VERSION", XS_UNIVERSAL_VERSION, file);
+ {
+ /* register the overloading (type 'A') magic */
+ PL_amagic_generation++;
+ /* Make it findable via fetchmethod */
+ newXS("version::()", XS_version_noop, file);
+ newXS("version::new", XS_version_new, file);
+ newXS("version::(\"\"", XS_version_stringify, file);
+ newXS("version::stringify", XS_version_stringify, file);
+ newXS("version::(0+", XS_version_numify, file);
+ newXS("version::numify", XS_version_numify, file);
+ newXS("version::(cmp", XS_version_vcmp, file);
+ newXS("version::(<=>", XS_version_vcmp, file);
+ newXS("version::vcmp", XS_version_vcmp, file);
+ newXS("version::(bool", XS_version_boolean, file);
+ newXS("version::boolean", XS_version_boolean, file);
+ newXS("version::(nomethod", XS_version_noop, file);
+ newXS("version::noop", XS_version_noop, file);
+ }
+ newXS("utf8::valid", XS_utf8_valid, file);
+ newXS("utf8::encode", XS_utf8_encode, file);
+ newXS("utf8::decode", XS_utf8_decode, file);
+ newXS("utf8::upgrade", XS_utf8_upgrade, file);
+ newXS("utf8::downgrade", XS_utf8_downgrade, file);
+ newXS("utf8::native_to_unicode", XS_utf8_native_to_unicode, file);
+ newXS("utf8::unicode_to_native", XS_utf8_unicode_to_native, file);
+ newXSproto("Internals::SvREADONLY",XS_Internals_SvREADONLY, file, "\\[$%@];$");
+ newXSproto("Internals::SvREFCNT",XS_Internals_SvREFCNT, file, "\\[$%@];$");
+ newXSproto("Internals::hv_clear_placeholders",
+ XS_Internals_hv_clear_placehold, file, "\\%");
+ newXSproto("PerlIO::get_layers",
+ XS_PerlIO_get_layers, file, "*;@");
}
-#include "XSUB.h"
XS(XS_UNIVERSAL_isa)
{
Perl_croak(aTHX_ "Usage: UNIVERSAL::isa(reference, kind)");
sv = ST(0);
+
+ if (SvGMAGICAL(sv))
+ mg_get(sv);
+
+ if (!SvOK(sv) || !(SvROK(sv) || (SvPOK(sv) && SvCUR(sv))
+ || (SvGMAGICAL(sv) && SvPOKp(sv) && SvCUR(sv))))
+ XSRETURN_UNDEF;
+
name = (char *)SvPV(ST(1),n_a);
ST(0) = boolSV(sv_derived_from(sv, name));
Perl_croak(aTHX_ "Usage: UNIVERSAL::can(object-ref, method)");
sv = ST(0);
+
+ if (SvGMAGICAL(sv))
+ mg_get(sv);
+
+ if (!SvOK(sv) || !(SvROK(sv) || (SvPOK(sv) && SvCUR(sv))
+ || (SvGMAGICAL(sv) && SvPOKp(sv) && SvCUR(sv))))
+ XSRETURN_UNDEF;
+
name = (char *)SvPV(ST(1),n_a);
rv = &PL_sv_undef;
- if(SvROK(sv)) {
+ if (SvROK(sv)) {
sv = (SV*)SvRV(sv);
- if(SvOBJECT(sv))
+ if (SvOBJECT(sv))
pkg = SvSTASH(sv);
}
else {
GV *gv;
SV *sv;
char *undef;
- NV req;
- if(SvROK(ST(0))) {
+ if (SvROK(ST(0))) {
sv = (SV*)SvRV(ST(0));
- if(!SvOBJECT(sv))
+ if (!SvOBJECT(sv))
Perl_croak(aTHX_ "Cannot find version of an unblessed reference");
pkg = SvSTASH(sv);
}
undef = "(undef)";
}
- if (items > 1 && (undef || (req = SvNV(ST(1)), req > SvNV(sv)))) {
- STRLEN n_a;
- Perl_croak(aTHX_ "%s version %s required--this is only version %s",
- HvNAME(pkg), SvPV(ST(1),n_a), undef ? undef : SvPV(sv,n_a));
+ if (items > 1) {
+ STRLEN len;
+ SV *req = ST(1);
+
+ if (undef) {
+ if (pkg)
+ Perl_croak(aTHX_
+ "%s does not define $%s::VERSION--version check failed",
+ HvNAME(pkg), HvNAME(pkg));
+ else {
+ char *str = SvPVx(ST(0), len);
+
+ Perl_croak(aTHX_
+ "%s defines neither package nor VERSION--version check failed", str);
+ }
+ }
+ if ( !sv_derived_from(sv, "version"))
+ sv = new_version(sv);
+
+ if ( !sv_derived_from(req, "version"))
+ req = new_version(req);
+
+ if ( vcmp( SvRV(req), SvRV(sv) ) > 0 )
+ Perl_croak(aTHX_
+ "%s version %"SVf" required--this is only version %"SVf,
+ HvNAME(pkg), req, sv);
}
ST(0) = sv;
XSRETURN(1);
}
+XS(XS_version_new)
+{
+ dXSARGS;
+ if (items > 3)
+ Perl_croak(aTHX_ "Usage: version::new(class, version)");
+ SP -= items;
+ {
+/* char * class = (char *)SvPV_nolen(ST(0)); */
+ SV *version = ST(1);
+ if (items == 3 )
+ {
+ char *vs = savepvn(SvPVX(ST(2)),SvCUR(ST(2)));
+ version = Perl_newSVpvf(aTHX_ "v%s",vs);
+ }
+
+ PUSHs(new_version(version));
+ PUTBACK;
+ return;
+ }
+}
+
+XS(XS_version_stringify)
+{
+ dXSARGS;
+ if (items < 1)
+ Perl_croak(aTHX_ "Usage: version::stringify(lobj, ...)");
+ SP -= items;
+ {
+ SV * lobj;
+
+ if (sv_derived_from(ST(0), "version")) {
+ SV *tmp = SvRV(ST(0));
+ lobj = tmp;
+ }
+ else
+ Perl_croak(aTHX_ "lobj is not of type version");
+
+{
+ PUSHs(vstringify(lobj));
+}
+
+ PUTBACK;
+ return;
+ }
+}
+
+XS(XS_version_numify)
+{
+ dXSARGS;
+ if (items < 1)
+ Perl_croak(aTHX_ "Usage: version::numify(lobj, ...)");
+ SP -= items;
+ {
+ SV * lobj;
+
+ if (sv_derived_from(ST(0), "version")) {
+ SV *tmp = SvRV(ST(0));
+ lobj = tmp;
+ }
+ else
+ Perl_croak(aTHX_ "lobj is not of type version");
+
+{
+ PUSHs(vnumify(lobj));
+}
+
+ PUTBACK;
+ return;
+ }
+}
+
+XS(XS_version_vcmp)
+{
+ dXSARGS;
+ if (items < 1)
+ Perl_croak(aTHX_ "Usage: version::vcmp(lobj, ...)");
+ SP -= items;
+ {
+ SV * lobj;
+
+ if (sv_derived_from(ST(0), "version")) {
+ SV *tmp = SvRV(ST(0));
+ lobj = tmp;
+ }
+ else
+ Perl_croak(aTHX_ "lobj is not of type version");
+
+{
+ SV *rs;
+ SV *rvs;
+ SV * robj = ST(1);
+ IV swap = (IV)SvIV(ST(2));
+
+ if ( ! sv_derived_from(robj, "version") )
+ {
+ robj = new_version(robj);
+ }
+ rvs = SvRV(robj);
+
+ if ( swap )
+ {
+ rs = newSViv(vcmp(rvs,lobj));
+ }
+ else
+ {
+ rs = newSViv(vcmp(lobj,rvs));
+ }
+
+ PUSHs(rs);
+}
+
+ PUTBACK;
+ return;
+ }
+}
+
+XS(XS_version_boolean)
+{
+ dXSARGS;
+ if (items < 1)
+ Perl_croak(aTHX_ "Usage: version::boolean(lobj, ...)");
+ SP -= items;
+ {
+ SV * lobj;
+
+ if (sv_derived_from(ST(0), "version")) {
+ SV *tmp = SvRV(ST(0));
+ lobj = tmp;
+ }
+ else
+ Perl_croak(aTHX_ "lobj is not of type version");
+
+{
+ SV *rs;
+ rs = newSViv( vcmp(lobj,new_version(newSVpvn("0",1))) );
+ PUSHs(rs);
+}
+
+ PUTBACK;
+ return;
+ }
+}
+
+XS(XS_version_noop)
+{
+ dXSARGS;
+ if (items < 1)
+ Perl_croak(aTHX_ "Usage: version::noop(lobj, ...)");
+ {
+ SV * lobj;
+
+ if (sv_derived_from(ST(0), "version")) {
+ SV *tmp = SvRV(ST(0));
+ lobj = tmp;
+ }
+ else
+ Perl_croak(aTHX_ "lobj is not of type version");
+
+{
+ Perl_croak(aTHX_ "operation not supported with version object");
+}
+
+ }
+ XSRETURN_EMPTY;
+}
+
+XS(XS_utf8_valid)
+{
+ dXSARGS;
+ if (items != 1)
+ Perl_croak(aTHX_ "Usage: utf8::valid(sv)");
+ {
+ SV * sv = ST(0);
+ {
+ STRLEN len;
+ char *s = SvPV(sv,len);
+ if (!SvUTF8(sv) || is_utf8_string((U8*)s,len))
+ XSRETURN_YES;
+ else
+ XSRETURN_NO;
+ }
+ }
+ XSRETURN_EMPTY;
+}
+
+XS(XS_utf8_encode)
+{
+ dXSARGS;
+ if (items != 1)
+ Perl_croak(aTHX_ "Usage: utf8::encode(sv)");
+ {
+ SV * sv = ST(0);
+
+ sv_utf8_encode(sv);
+ }
+ XSRETURN_EMPTY;
+}
+
+XS(XS_utf8_decode)
+{
+ dXSARGS;
+ if (items != 1)
+ Perl_croak(aTHX_ "Usage: utf8::decode(sv)");
+ {
+ SV * sv = ST(0);
+ bool RETVAL;
+
+ RETVAL = sv_utf8_decode(sv);
+ ST(0) = boolSV(RETVAL);
+ sv_2mortal(ST(0));
+ }
+ XSRETURN(1);
+}
+
+XS(XS_utf8_upgrade)
+{
+ dXSARGS;
+ if (items != 1)
+ Perl_croak(aTHX_ "Usage: utf8::upgrade(sv)");
+ {
+ SV * sv = ST(0);
+ STRLEN RETVAL;
+ dXSTARG;
+
+ RETVAL = sv_utf8_upgrade(sv);
+ XSprePUSH; PUSHi((IV)RETVAL);
+ }
+ XSRETURN(1);
+}
+
+XS(XS_utf8_downgrade)
+{
+ dXSARGS;
+ if (items < 1 || items > 2)
+ Perl_croak(aTHX_ "Usage: utf8::downgrade(sv, failok=0)");
+ {
+ SV * sv = ST(0);
+ bool failok;
+ bool RETVAL;
+
+ if (items < 2)
+ failok = 0;
+ else {
+ failok = (int)SvIV(ST(1));
+ }
+
+ RETVAL = sv_utf8_downgrade(sv, failok);
+ ST(0) = boolSV(RETVAL);
+ sv_2mortal(ST(0));
+ }
+ XSRETURN(1);
+}
+
+XS(XS_utf8_native_to_unicode)
+{
+ dXSARGS;
+ UV uv = SvUV(ST(0));
+
+ if (items > 1)
+ Perl_croak(aTHX_ "Usage: utf8::native_to_unicode(sv)");
+
+ ST(0) = sv_2mortal(newSViv(NATIVE_TO_UNI(uv)));
+ XSRETURN(1);
+}
+
+XS(XS_utf8_unicode_to_native)
+{
+ dXSARGS;
+ UV uv = SvUV(ST(0));
+
+ if (items > 1)
+ Perl_croak(aTHX_ "Usage: utf8::unicode_to_native(sv)");
+
+ ST(0) = sv_2mortal(newSViv(UNI_TO_NATIVE(uv)));
+ XSRETURN(1);
+}
+
+XS(XS_Internals_SvREADONLY) /* This is dangerous stuff. */
+{
+ dXSARGS;
+ SV *sv = SvRV(ST(0));
+ if (items == 1) {
+ if (SvREADONLY(sv))
+ XSRETURN_YES;
+ else
+ XSRETURN_NO;
+ }
+ else if (items == 2) {
+ if (SvTRUE(ST(1))) {
+ SvREADONLY_on(sv);
+ XSRETURN_YES;
+ }
+ else {
+ /* I hope you really know what you are doing. */
+ SvREADONLY_off(sv);
+ XSRETURN_NO;
+ }
+ }
+ XSRETURN_UNDEF; /* Can't happen. */
+}
+
+XS(XS_Internals_SvREFCNT) /* This is dangerous stuff. */
+{
+ dXSARGS;
+ SV *sv = SvRV(ST(0));
+ if (items == 1)
+ XSRETURN_IV(SvREFCNT(sv) - 1); /* Minus the ref created for us. */
+ else if (items == 2) {
+ /* I hope you really know what you are doing. */
+ SvREFCNT(sv) = SvIV(ST(1));
+ XSRETURN_IV(SvREFCNT(sv));
+ }
+ XSRETURN_UNDEF; /* Can't happen. */
+}
+
+/* Maybe this should return the number of placeholders found in scalar context,
+ and a list of them in list context. */
+XS(XS_Internals_hv_clear_placehold)
+{
+ dXSARGS;
+ HV *hv = (HV *) SvRV(ST(0));
+
+ /* I don't care how many parameters were passed in, but I want to avoid
+ the unused variable warning. */
+
+ items = (I32)HvPLACEHOLDERS(hv);
+
+ if (items) {
+ HE *entry;
+ I32 riter = HvRITER(hv);
+ HE *eiter = HvEITER(hv);
+ hv_iterinit(hv);
+ /* This may look suboptimal with the items *after* the iternext, but
+ it's quite deliberate. We only get here with items==0 if we've
+ just deleted the last placeholder in the hash. If we've just done
+ that then it means that the hash is in lazy delete mode, and the
+ HE is now only referenced in our iterator. If we just quit the loop
+ and discarded our iterator then the HE leaks. So we do the && the
+ other way to ensure iternext is called just one more time, which
+ has the side effect of triggering the lazy delete. */
+ while ((entry = hv_iternext_flags(hv, HV_ITERNEXT_WANTPLACEHOLDERS))
+ && items) {
+ SV *val = hv_iterval(hv, entry);
+
+ if (val == &PL_sv_undef) {
+
+ /* It seems that I have to go back in the front of the hash
+ API to delete a hash, even though I have a HE structure
+ pointing to the very entry I want to delete, and could hold
+ onto the previous HE that points to it. And it's easier to
+ go in with SVs as I can then specify the precomputed hash,
+ and don't have fun and games with utf8 keys. */
+ SV *key = hv_iterkeysv(entry);
+
+ hv_delete_ent (hv, key, G_DISCARD, HeHASH(entry));
+ items--;
+ }
+ }
+ HvRITER(hv) = riter;
+ HvEITER(hv) = eiter;
+ }
+
+ XSRETURN(0);
+}
+
+XS(XS_PerlIO_get_layers)
+{
+ dXSARGS;
+ if (items < 1 || items % 2 == 0)
+ Perl_croak(aTHX_ "Usage: PerlIO_get_layers(filehandle[,args])");
+#ifdef USE_PERLIO
+ {
+ SV * sv;
+ GV * gv;
+ IO * io;
+ bool input = TRUE;
+ bool details = FALSE;
+
+ if (items > 1) {
+ SV **popuntil = MARK + 1;
+ SV **svp;
+
+ for (svp = MARK + 2; svp <= SP; svp += 2) {
+ SV **varp = svp;
+ SV **valp = svp + 1;
+ STRLEN klen;
+ char *key = SvPV(*varp, klen);
+
+ switch (*key) {
+ case 'i':
+ if (klen == 5 && memEQ(key, "input", 5)) {
+ input = SvTRUE(*valp);
+ break;
+ }
+ goto fail;
+ case 'o':
+ if (klen == 6 && memEQ(key, "output", 6)) {
+ input = !SvTRUE(*valp);
+ break;
+ }
+ goto fail;
+ case 'd':
+ if (klen == 7 && memEQ(key, "details", 7)) {
+ details = SvTRUE(*valp);
+ break;
+ }
+ goto fail;
+ default:
+ fail:
+ Perl_croak(aTHX_
+ "get_layers: unknown argument '%s'",
+ key);
+ }
+ }
+
+ SP -= (items - 1);
+ }
+
+ sv = POPs;
+ gv = (GV*)sv;
+
+ if (!isGV(sv)) {
+ if (SvROK(sv) && isGV(SvRV(sv)))
+ gv = (GV*)SvRV(sv);
+ else
+ gv = gv_fetchpv(SvPVX(sv), FALSE, SVt_PVIO);
+ }
+
+ if (gv && (io = GvIO(gv))) {
+ dTARGET;
+ AV* av = PerlIO_get_layers(aTHX_ input ?
+ IoIFP(io) : IoOFP(io));
+ I32 i;
+ I32 last = av_len(av);
+ I32 nitem = 0;
+
+ for (i = last; i >= 0; i -= 3) {
+ SV **namsvp;
+ SV **argsvp;
+ SV **flgsvp;
+ bool namok, argok, flgok;
+
+ namsvp = av_fetch(av, i - 2, FALSE);
+ argsvp = av_fetch(av, i - 1, FALSE);
+ flgsvp = av_fetch(av, i, FALSE);
+
+ namok = namsvp && *namsvp && SvPOK(*namsvp);
+ argok = argsvp && *argsvp && SvPOK(*argsvp);
+ flgok = flgsvp && *flgsvp && SvIOK(*flgsvp);
+
+ if (details) {
+ XPUSHs(namok ?
+ newSVpv(SvPVX(*namsvp), 0) : &PL_sv_undef);
+ XPUSHs(argok ?
+ newSVpv(SvPVX(*argsvp), 0) : &PL_sv_undef);
+ if (flgok)
+ XPUSHi(SvIVX(*flgsvp));
+ else
+ XPUSHs(&PL_sv_undef);
+ nitem += 3;
+ }
+ else {
+ if (namok && argok)
+ XPUSHs(Perl_newSVpvf(aTHX_ "%"SVf"(%"SVf")",
+ *namsvp, *argsvp));
+ else if (namok)
+ XPUSHs(Perl_newSVpvf(aTHX_ "%"SVf, *namsvp));
+ else
+ XPUSHs(&PL_sv_undef);
+ nitem++;
+ if (flgok) {
+ IV flags = SvIVX(*flgsvp);
+
+ if (flags & PERLIO_F_UTF8) {
+ XPUSHs(newSVpvn("utf8", 4));
+ nitem++;
+ }
+ }
+ }
+ }
+
+ SvREFCNT_dec(av);
+
+ XSRETURN(nitem);
+ }
+ }
+#endif
+
+ XSRETURN(0);
+}
+