+/* universal.c
+ *
+ * Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
+ * 2005, 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.
+ *
+ */
+
+/*
+ * "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
+ */
+
+/* This file contains the code that implements the functions in Perl's
+ * UNIVERSAL package, such as UNIVERSAL->can().
+ */
+
#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;
+ const char *hvname;
+
+ /* 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 (!stash)
- return &PL_sv_undef;
+ hvname = HvNAME_get(stash);
- if(strEQ(HvNAME(stash), name))
+ if (strEQ(hvname, name))
+ return &PL_sv_yes;
+
+ if (strEQ(name, "UNIVERSAL"))
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);
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) );
+ return sv;
+ }
+ }
+ else {
+ DEBUG_o( Perl_deb(aTHX_ "ISA Cache in package %s is stale\n",
+ hvname) );
+ 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);
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;
}
(void)hv_store(hv,name,len,&PL_sv_no,0);
}
}
-
- return boolSV(strEQ(name, "UNIVERSAL"));
+ return &PL_sv_no;
}
/*
+=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;
-
- stash = Nullhv;
- type = Nullch;
-
+ const char *type = Nullch;
+ HV *stash = Nullhv;
+ HV *name_stash;
+
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"
+
+PERL_XS_EXPORT_C void XS_UNIVERSAL_isa(pTHX_ CV *cv);
+PERL_XS_EXPORT_C void XS_UNIVERSAL_can(pTHX_ CV *cv);
+PERL_XS_EXPORT_C void XS_UNIVERSAL_VERSION(pTHX_ CV *cv);
+XS(XS_version_new);
+XS(XS_version_stringify);
+XS(XS_version_numify);
+XS(XS_version_normal);
+XS(XS_version_vcmp);
+XS(XS_version_boolean);
+#ifdef HASATTRIBUTE_NORETURN
+XS(XS_version_noop) __attribute__noreturn__;
+#else
+XS(XS_version_noop);
+#endif
+XS(XS_version_is_alpha);
+XS(XS_version_qv);
+XS(XS_utf8_is_utf8);
+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);
+XS(XS_Regexp_DESTROY);
+XS(XS_Internals_hash_seed);
+XS(XS_Internals_rehash_seed);
+XS(XS_Internals_HvREHASH);
void
Perl_boot_core_UNIVERSAL(pTHX)
{
- char *file = __FILE__;
+ const char file[] = __FILE__;
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::normal", XS_version_normal, 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("version::is_alpha", XS_version_is_alpha, file);
+ newXS("version::qv", XS_version_qv, file);
+ }
+ newXS("utf8::is_utf8", XS_utf8_is_utf8, 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, "*;@");
+ newXS("Regexp::DESTROY", XS_Regexp_DESTROY, file);
+ newXSproto("Internals::hash_seed",XS_Internals_hash_seed, file, "");
+ newXSproto("Internals::rehash_seed",XS_Internals_rehash_seed, file, "");
+ newXSproto("Internals::HvREHASH", XS_Internals_HvREHASH, file, "\\%");
}
-#include "XSUB.h"
XS(XS_UNIVERSAL_isa)
{
dXSARGS;
SV *sv;
- char *name;
- STRLEN n_a;
+ const char *name;
if (items != 2)
Perl_croak(aTHX_ "Usage: UNIVERSAL::isa(reference, kind)");
sv = ST(0);
- name = (char *)SvPV(ST(1),n_a);
+
+ if (SvGMAGICAL(sv))
+ mg_get(sv);
+
+ if (!SvOK(sv) || !(SvROK(sv) || (SvPOK(sv) && SvCUR(sv))
+ || (SvGMAGICAL(sv) && SvPOKp(sv) && SvCUR(sv))))
+ XSRETURN_UNDEF;
+
+ name = SvPV_nolen_const(ST(1));
ST(0) = boolSV(sv_derived_from(sv, name));
XSRETURN(1);
{
dXSARGS;
SV *sv;
- char *name;
+ const char *name;
SV *rv;
HV *pkg = NULL;
- STRLEN n_a;
if (items != 2)
Perl_croak(aTHX_ "Usage: UNIVERSAL::can(object-ref, method)");
sv = ST(0);
- name = (char *)SvPV(ST(1),n_a);
+
+ if (SvGMAGICAL(sv))
+ mg_get(sv);
+
+ if (!SvOK(sv) || !(SvROK(sv) || (SvPOK(sv) && SvCUR(sv))
+ || (SvGMAGICAL(sv) && SvPOKp(sv) && SvCUR(sv))))
+ XSRETURN_UNDEF;
+
+ name = SvPV_nolen_const(ST(1));
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 **gvp;
GV *gv;
SV *sv;
- char *undef;
- NV req;
+ const char *undef;
- 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);
}
SV *nsv = sv_newmortal();
sv_setsv(nsv, sv);
sv = nsv;
+ if ( !sv_derived_from(sv, "version"))
+ upg_version(sv);
undef = Nullch;
}
else {
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) {
+ SV *req = ST(1);
+
+ if (undef) {
+ if (pkg) {
+ const char *name = HvNAME_get(pkg);
+ Perl_croak(aTHX_
+ "%s does not define $%s::VERSION--version check failed",
+ name, name);
+ } else {
+ Perl_croak(aTHX_
+ "%s defines neither package nor VERSION--version check failed",
+ SvPVx_nolen_const(ST(0)) );
+ }
+ }
+
+ if ( !sv_derived_from(req, "version")) {
+ /* req may very well be R/O, so create a new object */
+ SV *nsv = sv_newmortal();
+ sv_setsv(nsv, req);
+ req = nsv;
+ upg_version(req);
+ }
+
+ if ( vcmp( req, sv ) > 0 )
+ Perl_croak(aTHX_ "%s version %"SVf" (%"SVf") required--"
+ "this is only version %"SVf" (%"SVf")", HvNAME_get(pkg),
+ vnumify(req),vnormal(req),vnumify(sv),vnormal(sv));
+ }
+
+ if ( SvOK(sv) && sv_derived_from(sv, "version") ) {
+ ST(0) = vnumify(sv);
+ } else {
+ ST(0) = sv;
+ }
+
+ XSRETURN(1);
+}
+
+XS(XS_version_new)
+{
+ dXSARGS;
+ if (items > 3)
+ Perl_croak(aTHX_ "Usage: version::new(class, version)");
+ SP -= items;
+ {
+ SV *vs = ST(1);
+ SV *rv;
+ const char *classname;
+
+ /* get the class if called as an object method */
+ if ( sv_isobject(ST(0)) ) {
+ classname = HvNAME(SvSTASH(SvRV(ST(0))));
+ }
+ else {
+ classname = (char *)SvPV_nolen(ST(0));
+ }
+
+ if ( items == 1 ) {
+ /* no parameter provided */
+ if ( sv_isobject(ST(0)) ) {
+ /* copy existing object */
+ vs = ST(0);
+ }
+ else {
+ /* create empty object */
+ vs = sv_newmortal();
+ sv_setpv(vs,"");
+ }
+ }
+ else if ( items == 3 ) {
+ vs = sv_newmortal();
+ Perl_sv_setpvf(aTHX_ vs,"v%s",SvPV_nolen_const(ST(2)));
+ }
+
+ rv = new_version(vs);
+ if ( strcmp(classname,"version") != 0 ) /* inherited new() */
+ sv_bless(rv, gv_stashpv(classname,TRUE));
+
+ PUSHs(sv_2mortal(rv));
+ PUTBACK;
+ return;
+ }
+}
+
+XS(XS_version_stringify)
+{
+ dXSARGS;
+ if (items < 1)
+ Perl_croak(aTHX_ "Usage: version::stringify(lobj, ...)");
+ SP -= items;
+ {
+ SV * lobj = Nullsv;
+
+ if (sv_derived_from(ST(0), "version")) {
+ lobj = SvRV(ST(0));
+ }
+ else
+ Perl_croak(aTHX_ "lobj is not of type version");
+
+ PUSHs(sv_2mortal(vstringify(lobj)));
+
+ PUTBACK;
+ return;
+ }
+}
+
+XS(XS_version_numify)
+{
+ dXSARGS;
+ if (items < 1)
+ Perl_croak(aTHX_ "Usage: version::numify(lobj, ...)");
+ SP -= items;
+ {
+ SV * lobj = Nullsv;
+
+ if (sv_derived_from(ST(0), "version")) {
+ lobj = SvRV(ST(0));
+ }
+ else
+ Perl_croak(aTHX_ "lobj is not of type version");
+
+ PUSHs(sv_2mortal(vnumify(lobj)));
+
+ PUTBACK;
+ return;
+ }
+}
+
+XS(XS_version_normal)
+{
+ dXSARGS;
+ if (items < 1)
+ Perl_croak(aTHX_ "Usage: version::normal(lobj, ...)");
+ SP -= items;
+ {
+ SV * lobj = Nullsv;
+
+ if (sv_derived_from(ST(0), "version")) {
+ lobj = SvRV(ST(0));
+ }
+ else
+ Perl_croak(aTHX_ "lobj is not of type version");
+
+ PUSHs(sv_2mortal(vnormal(lobj)));
+
+ PUTBACK;
+ return;
+ }
+}
+
+XS(XS_version_vcmp)
+{
+ dXSARGS;
+ if (items < 1)
+ Perl_croak(aTHX_ "Usage: version::vcmp(lobj, ...)");
+ SP -= items;
+ {
+ SV * lobj = Nullsv;
+
+ if (sv_derived_from(ST(0), "version")) {
+ lobj = SvRV(ST(0));
+ }
+ 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(sv_2mortal(rs));
+ }
+
+ PUTBACK;
+ return;
+ }
+}
+
+XS(XS_version_boolean)
+{
+ dXSARGS;
+ if (items < 1)
+ Perl_croak(aTHX_ "Usage: version::boolean(lobj, ...)");
+ SP -= items;
+ {
+ SV * lobj = Nullsv;
+
+ if (sv_derived_from(ST(0), "version")) {
+ lobj = SvRV(ST(0));
+ }
+ else
+ Perl_croak(aTHX_ "lobj is not of type version");
+
+ {
+ SV *rs;
+ rs = newSViv( vcmp(lobj,new_version(newSVpvn("0",1))) );
+ PUSHs(sv_2mortal(rs));
+ }
+
+ PUTBACK;
+ return;
+ }
+}
+
+XS(XS_version_noop)
+{
+ dXSARGS;
+ if (items < 1)
+ Perl_croak(aTHX_ "Usage: version::noop(lobj, ...)");
+ if (sv_derived_from(ST(0), "version"))
+ Perl_croak(aTHX_ "operation not supported with version object");
+ else
+ Perl_croak(aTHX_ "lobj is not of type version");
+#ifndef HASATTRIBUTE_NORETURN
+ XSRETURN_EMPTY;
+#endif
+}
+
+XS(XS_version_is_alpha)
+{
+ dXSARGS;
+ if (items != 1)
+ Perl_croak(aTHX_ "Usage: version::is_alpha(lobj)");
+ SP -= items;
+ {
+ SV * lobj = Nullsv;
+
+ if (sv_derived_from(ST(0), "version"))
+ lobj = ST(0);
+ else
+ Perl_croak(aTHX_ "lobj is not of type version");
+{
+ if ( hv_exists((HV*)SvRV(lobj), "alpha", 5 ) )
+ XSRETURN_YES;
+ else
+ XSRETURN_NO;
+}
+ PUTBACK;
+ return;
+ }
+}
+
+XS(XS_version_qv)
+{
+ dXSARGS;
+ if (items != 1)
+ Perl_croak(aTHX_ "Usage: version::qv(ver)");
+ SP -= items;
+ {
+ SV * ver = ST(0);
+ if ( !SvVOK(ver) ) /* only need to do with if not already v-string */
+ {
+ SV *vs = sv_newmortal();
+ char *version;
+ if ( SvNOK(ver) ) /* may get too much accuracy */
+ {
+ char tbuf[64];
+ sprintf(tbuf,"%.9"NVgf, SvNVX(ver));
+ version = savepv(tbuf);
+ }
+ else
+ {
+ version = savesvpv(ver);
+ }
+ (void)scan_version(version,vs,TRUE);
+ Safefree(version);
+
+ PUSHs(vs);
+ }
+ else
+ {
+ PUSHs(sv_2mortal(new_version(ver)));
+ }
+
+ PUTBACK;
+ return;
+ }
+}
+
+XS(XS_utf8_is_utf8)
+{
+ dXSARGS;
+ if (items != 1)
+ Perl_croak(aTHX_ "Usage: utf8::is_utf8(sv)");
+ {
+ const SV *sv = ST(0);
+ {
+ if (SvUTF8(sv))
+ XSRETURN_YES;
+ else
+ XSRETURN_NO;
+ }
+ }
+ XSRETURN_EMPTY;
+}
+
+XS(XS_utf8_valid)
+{
+ dXSARGS;
+ if (items != 1)
+ Perl_croak(aTHX_ "Usage: utf8::valid(sv)");
+ {
+ SV * sv = ST(0);
+ {
+ STRLEN len;
+ const char *s = SvPV_const(sv,len);
+ if (!SvUTF8(sv) || is_utf8_string((const 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;
+}
- ST(0) = sv;
+XS(XS_utf8_decode)
+{
+ dXSARGS;
+ if (items != 1)
+ Perl_croak(aTHX_ "Usage: utf8::decode(sv)");
+ {
+ SV * sv = ST(0);
+ const bool 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);
+ const bool failok = (items < 2) ? 0 : (int)SvIV(ST(1));
+ const bool RETVAL = sv_utf8_downgrade(sv, failok);
+
+ ST(0) = boolSV(RETVAL);
+ sv_2mortal(ST(0));
+ }
+ XSRETURN(1);
+}
+
+XS(XS_utf8_native_to_unicode)
+{
+ dXSARGS;
+ const 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;
+ const 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. */
+}
+
+XS(XS_Internals_hv_clear_placehold)
+{
+ dXSARGS;
+ HV *hv = (HV *) SvRV(ST(0));
+
+ if (items != 1)
+ Perl_croak(aTHX_ "Usage: UNIVERSAL::hv_clear_placeholders(hv)");
+ hv_clear_placeholders(hv);
+ XSRETURN(0);
+}
+
+XS(XS_Regexp_DESTROY)
+{
+}
+
+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 **svp;
+
+ for (svp = MARK + 2; svp <= SP; svp += 2) {
+ SV **varp = svp;
+ SV **valp = svp + 1;
+ STRLEN klen;
+ const char *key = SvPV_const(*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_fetchsv(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_const(*namsvp), 0) : &PL_sv_undef);
+ XPUSHs(argok ?
+ newSVpv(SvPVX_const(*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);
+}
+
+XS(XS_Internals_hash_seed)
+{
+ /* Using dXSARGS would also have dITEM and dSP,
+ * which define 2 unused local variables. */
+ dAXMARK;
+ (void)mark;
+ XSRETURN_UV(PERL_HASH_SEED);
+}
+
+XS(XS_Internals_rehash_seed)
+{
+ /* Using dXSARGS would also have dITEM and dSP,
+ * which define 2 unused local variables. */
+ dAXMARK;
+ (void)mark;
+ XSRETURN_UV(PL_rehash_seed);
+}
+
+XS(XS_Internals_HvREHASH) /* Subject to change */
+{
+ dXSARGS;
+ if (SvROK(ST(0))) {
+ const HV *hv = (HV *) SvRV(ST(0));
+ if (items == 1 && SvTYPE(hv) == SVt_PVHV) {
+ if (HvREHASH(hv))
+ XSRETURN_YES;
+ else
+ XSRETURN_NO;
+ }
+ }
+ Perl_croak(aTHX_ "Internals::HvREHASH $hashref");
+}
+
+/*
+ * Local variables:
+ * c-indentation-style: bsd
+ * c-basic-offset: 4
+ * indent-tabs-mode: t
+ * End:
+ *
+ * ex: set ts=8 sts=4 sw=4 noet:
+ */