/* universal.c
*
- * Copyright (c) 1997-2002, Larry Wall
+ * 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.
* 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
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 (strEQ(HvNAME(stash), name))
+ hvname = HvNAME_get(stash);
+
+ 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));
+ hvname);
gvp = (GV**)hv_fetch(stash, "::ISA::CACHE::", 14, FALSE);
if (gvp && (gv = *gvp) != (GV*)&PL_sv_undef && (subgen = GvSV(gv))
&& (hv = GvHV(gv)))
{
- if (SvIV(subgen) == PL_sub_generation) {
+ if (SvIV(subgen) == (IV)PL_sub_generation) {
SV* sv;
- SV** svp = (SV**)hv_fetch(hv, name, len, FALSE);
+ SV** const 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)) );
+ name, hvname) );
return sv;
}
}
else {
DEBUG_o( Perl_deb(aTHX_ "ISA Cache in package %s is stale\n",
- HvNAME(stash)) );
+ hvname) );
hv_clear(hv);
sv_setiv(subgen, PL_sub_generation);
}
/* NOTE: No support for tied ISA */
I32 items = AvFILLp(av) + 1;
while (items--) {
- SV* sv = *svp++;
- HV* basestash = gv_stashsv(sv, FALSE);
+ SV* const sv = *svp++;
+ HV* const basestash = gv_stashsv(sv, FALSE);
if (!basestash) {
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, name_stash,
(void)hv_store(hv,name,len,&PL_sv_no,0);
}
}
-
- return boolSV(strEQ(name, "UNIVERSAL"));
+ return &PL_sv_no;
}
/*
bool
Perl_sv_derived_from(pTHX_ SV *sv, const char *name)
{
- char *type;
- HV *stash;
+ const char *type = Nullch;
+ HV *stash = Nullhv;
HV *name_stash;
- stash = Nullhv;
- type = Nullch;
-
- if (SvGMAGICAL(sv))
- mg_get(sv) ;
+ SvGETMAGIC(sv);
if (SvROK(sv)) {
sv = SvRV(sv);
#include "XSUB.h"
-void XS_UNIVERSAL_isa(pTHX_ CV *cv);
-void XS_UNIVERSAL_can(pTHX_ CV *cv);
-void XS_UNIVERSAL_VERSION(pTHX_ CV *cv);
+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_downgrade);
XS(XS_utf8_unicode_to_native);
XS(XS_utf8_native_to_unicode);
-XS(XS_access_readonly);
+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::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("access::readonly",XS_access_readonly, 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, "\\%");
}
XS(XS_UNIVERSAL_isa)
{
dXSARGS;
- SV *sv;
- char *name;
- STRLEN n_a;
if (items != 2)
Perl_croak(aTHX_ "Usage: UNIVERSAL::isa(reference, kind)");
+ else {
+ SV * const sv = ST(0);
+ const char *name;
- sv = ST(0);
-
- if (SvGMAGICAL(sv))
- mg_get(sv);
+ SvGETMAGIC(sv);
- if (!SvOK(sv) || !(SvROK(sv) || (SvPOK(sv) && SvCUR(sv))))
- XSRETURN_UNDEF;
+ if (!SvOK(sv) || !(SvROK(sv) || (SvPOK(sv) && SvCUR(sv))
+ || (SvGMAGICAL(sv) && SvPOKp(sv) && SvCUR(sv))))
+ XSRETURN_UNDEF;
- name = (char *)SvPV(ST(1),n_a);
+ name = SvPV_nolen_const(ST(1));
- ST(0) = boolSV(sv_derived_from(sv, name));
- XSRETURN(1);
+ ST(0) = boolSV(sv_derived_from(sv, name));
+ XSRETURN(1);
+ }
}
XS(XS_UNIVERSAL_can)
{
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);
- if (SvGMAGICAL(sv))
- mg_get(sv);
+ SvGETMAGIC(sv);
- if (!SvOK(sv) || !(SvROK(sv) || (SvPOK(sv) && SvCUR(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);
+ name = SvPV_nolen_const(ST(1));
rv = &PL_sv_undef;
if (SvROK(sv)) {
}
if (pkg) {
- GV *gv = gv_fetchmethod_autoload(pkg, name, FALSE);
+ GV * const gv = gv_fetchmethod_autoload(pkg, name, FALSE);
if (gv && isGV(gv))
rv = sv_2mortal(newRV((SV*)GvCV(gv)));
}
GV **gvp;
GV *gv;
SV *sv;
- char *undef;
+ const char *undef;
if (SvROK(ST(0))) {
sv = (SV*)SvRV(ST(0));
gvp = pkg ? (GV**)hv_fetch(pkg,"VERSION",7,FALSE) : Null(GV**);
- if (gvp && isGV(gv = *gvp) && SvOK(sv = GvSV(gv))) {
- SV *nsv = sv_newmortal();
+ if (gvp && isGV(gv = *gvp) && (sv = GvSV(gv)) && SvOK(sv)) {
+ SV * const nsv = sv_newmortal();
sv_setsv(nsv, sv);
sv = nsv;
+ if ( !sv_derived_from(sv, "version"))
+ upg_version(sv);
undef = Nullch;
}
else {
}
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 (pkg) {
+ const char * const 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 (!SvNIOK(sv) && SvPOK(sv)) {
- char *str = SvPVx(sv,len);
- while (len) {
- --len;
- /* XXX could DWIM "1.2.3" here */
- if (!isDIGIT(str[len]) && str[len] != '.' && str[len] != '_')
- break;
+
+ if ( !sv_derived_from(req, "version")) {
+ /* req may very well be R/O, so create a new object */
+ SV * const 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 * const classname =
+ sv_isobject(ST(0)) /* get the class if called as an object method */
+ ? HvNAME(SvSTASH(SvRV(ST(0))))
+ : (char *)SvPV_nolen(ST(0));
+
+ if ( items == 1 ) {
+ /* no parameter provided */
+ if ( sv_isobject(ST(0)) ) {
+ /* copy existing object */
+ vs = ST(0);
}
- if (len) {
- if (SvNOK(req) && SvPOK(req)) {
- /* they said C<use Foo v1.2.3> and $Foo::VERSION
- * doesn't look like a float: do string compare */
- if (sv_cmp(req,sv) == 1) {
- Perl_croak(aTHX_ "%s v%"VDf" required--"
- "this is only v%"VDf,
- HvNAME(pkg), req, sv);
- }
- goto finish;
- }
- /* they said C<use Foo 1.002_003> and $Foo::VERSION
- * doesn't look like a float: force numeric compare */
- (void)SvUPGRADE(sv, SVt_PVNV);
- SvNVX(sv) = str_to_version(sv);
- SvPOK_off(sv);
- SvNOK_on(sv);
+ else {
+ /* create empty object */
+ vs = sv_newmortal();
+ sv_setpvn(vs,"",0);
}
}
- /* if we get here, we're looking for a numeric comparison,
- * so force the required version into a float, even if they
- * said C<use Foo v1.2.3> */
- if (SvNOK(req) && SvPOK(req)) {
- NV n = SvNV(req);
- req = sv_newmortal();
- sv_setnv(req, n);
+ else if ( items == 3 ) {
+ vs = sv_newmortal();
+ Perl_sv_setpvf(aTHX_ vs,"v%s",SvPV_nolen_const(ST(2)));
}
- if (SvNV(req) > SvNV(sv))
- Perl_croak(aTHX_ "%s version %s required--this is only version %s",
- HvNAME(pkg), SvPV_nolen(req), SvPV_nolen(sv));
+ rv = new_version(vs);
+ if ( strcmp(classname,"version") != 0 ) /* inherited new() */
+ sv_bless(rv, gv_stashpv(classname,TRUE));
+
+ PUSHs(sv_2mortal(rv));
+ PUTBACK;
+ return;
}
+}
-finish:
- ST(0) = sv;
+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")) {
+ lobj = SvRV(ST(0));
+ }
+ else
+ Perl_croak(aTHX_ "lobj is not of type version");
+
+ PUSHs(sv_2mortal(vstringify(lobj)));
+
+ PUTBACK;
+ return;
+ }
+}
- XSRETURN(1);
+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")) {
+ lobj = SvRV(ST(0));
+ }
+ else
+ Perl_croak(aTHX_ "lobj is not of type version");
+
+ PUSHs(sv_2mortal(vnumify(lobj)));
+
+ PUTBACK;
+ return;
+ }
}
-XS(XS_utf8_valid)
+XS(XS_version_normal)
+{
+ dXSARGS;
+ if (items < 1)
+ Perl_croak(aTHX_ "Usage: version::normal(lobj, ...)");
+ SP -= items;
+ {
+ SV * lobj;
+
+ 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;
+
+ 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);
+ const 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;
+ if (sv_derived_from(ST(0), "version")) {
+ SV * const lobj = SvRV(ST(0));
+ SV * const rs = newSViv( vcmp(lobj,new_version(newSVpvn("0",1))) );
+ PUSHs(sv_2mortal(rs));
+ PUTBACK;
+ return;
+ }
+ else
+ Perl_croak(aTHX_ "lobj is not of type version");
+}
+
+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: 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;
- }
+ Perl_croak(aTHX_ "Usage: version::is_alpha(lobj)");
+ SP -= items;
+ if (sv_derived_from(ST(0), "version")) {
+ SV * const lobj = ST(0);
+ if ( hv_exists((HV*)SvRV(lobj), "alpha", 5 ) )
+ XSRETURN_YES;
+ else
+ XSRETURN_NO;
+ PUTBACK;
+ return;
}
- XSRETURN_EMPTY;
+ else
+ Perl_croak(aTHX_ "lobj is not of type version");
}
-XS(XS_utf8_encode)
+XS(XS_version_qv)
{
dXSARGS;
if (items != 1)
- Perl_croak(aTHX_ "Usage: utf8::encode(sv)");
+ Perl_croak(aTHX_ "Usage: version::qv(ver)");
+ SP -= items;
{
- SV * sv = ST(0);
+ SV * ver = ST(0);
+ if ( !SvVOK(ver) ) { /* only need to do with if not already v-string */
+ SV * const vs = sv_newmortal();
+ char *version;
+ if ( SvNOK(ver) ) /* may get too much accuracy */
+ {
+ char tbuf[64];
+ const STRLEN len = my_sprintf(tbuf,"%.9"NVgf, SvNVX(ver));
+ version = savepvn(tbuf, len);
+ }
+ else
+ {
+ version = savesvpv(ver);
+ }
+ (void)scan_version(version,vs,TRUE);
+ Safefree(version);
+
+ PUSHs(vs);
+ }
+ else
+ {
+ PUSHs(sv_2mortal(new_version(ver)));
+ }
+
+ PUTBACK;
+ return;
+ }
+}
- sv_utf8_encode(sv);
+XS(XS_utf8_is_utf8)
+{
+ dXSARGS;
+ if (items != 1)
+ Perl_croak(aTHX_ "Usage: utf8::is_utf8(sv)");
+ else {
+ const SV * const 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)");
+ else {
+ SV * const sv = ST(0);
+ STRLEN len;
+ const char * const 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_utf8_encode(ST(0));
XSRETURN_EMPTY;
}
dXSARGS;
if (items != 1)
Perl_croak(aTHX_ "Usage: utf8::decode(sv)");
- {
- SV * sv = ST(0);
- bool RETVAL;
-
- RETVAL = sv_utf8_decode(sv);
+ else {
+ SV * const sv = ST(0);
+ const bool RETVAL = sv_utf8_decode(sv);
ST(0) = boolSV(RETVAL);
sv_2mortal(ST(0));
}
dXSARGS;
if (items != 1)
Perl_croak(aTHX_ "Usage: utf8::upgrade(sv)");
- {
- SV * sv = ST(0);
+ else {
+ SV * const sv = ST(0);
STRLEN RETVAL;
dXSTARG;
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));
- }
+ else {
+ SV * const sv = ST(0);
+ const bool failok = (items < 2) ? 0 : (int)SvIV(ST(1));
+ const bool RETVAL = sv_utf8_downgrade(sv, failok);
- RETVAL = sv_utf8_downgrade(sv, failok);
ST(0) = boolSV(RETVAL);
sv_2mortal(ST(0));
}
XS(XS_utf8_native_to_unicode)
{
dXSARGS;
- UV uv = SvUV(ST(0));
+ const UV uv = SvUV(ST(0));
if (items > 1)
Perl_croak(aTHX_ "Usage: utf8::native_to_unicode(sv)");
XS(XS_utf8_unicode_to_native)
{
dXSARGS;
- UV uv = SvUV(ST(0));
+ const UV uv = SvUV(ST(0));
if (items > 1)
Perl_croak(aTHX_ "Usage: utf8::unicode_to_native(sv)");
XSRETURN(1);
}
-XS(XS_access_readonly)
+XS(XS_Internals_SvREADONLY) /* This is dangerous stuff. */
{
dXSARGS;
- SV *sv = SvRV(ST(0));
- IV old = SvREADONLY(sv);
- if (items == 2) {
+ SV * const 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;
}
}
- if (old)
- XSRETURN_YES;
- else
- XSRETURN_NO;
+ XSRETURN_UNDEF; /* Can't happen. */
+}
+
+XS(XS_Internals_SvREFCNT) /* This is dangerous stuff. */
+{
+ dXSARGS;
+ SV * const 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;
+
+ if (items != 1)
+ Perl_croak(aTHX_ "Usage: UNIVERSAL::hv_clear_placeholders(hv)");
+ else {
+ HV * const hv = (HV *) SvRV(ST(0));
+ hv_clear_placeholders(hv);
+ XSRETURN(0);
+ }
+}
+
+XS(XS_Regexp_DESTROY)
+{
+ PERL_UNUSED_ARG(cv);
+}
+
+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 * const *svp;
+ for (svp = MARK + 2; svp <= SP; svp += 2) {
+ SV * const * const varp = svp;
+ SV * const * const valp = svp + 1;
+ STRLEN klen;
+ const char * const 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 if (SvPOKp(sv))
+ gv = gv_fetchsv(sv, FALSE, SVt_PVIO);
+ }
+
+ if (gv && (io = GvIO(gv))) {
+ dTARGET;
+ AV* const av = PerlIO_get_layers(aTHX_ input ?
+ IoIFP(io) : IoOFP(io));
+ I32 i;
+ const I32 last = av_len(av);
+ I32 nitem = 0;
+
+ for (i = last; i >= 0; i -= 3) {
+ SV * const * const namsvp = av_fetch(av, i - 2, FALSE);
+ SV * const * const argsvp = av_fetch(av, i - 1, FALSE);
+ SV * const * const flgsvp = av_fetch(av, i, FALSE);
+
+ const bool namok = namsvp && *namsvp && SvPOK(*namsvp);
+ const bool argok = argsvp && *argsvp && SvPOK(*argsvp);
+ const bool flgok = flgsvp && *flgsvp && SvIOK(*flgsvp);
+
+ if (details) {
+ XPUSHs(namok
+ ? newSVpvn(SvPVX_const(*namsvp), SvCUR(*namsvp))
+ : &PL_sv_undef);
+ XPUSHs(argok
+ ? newSVpvn(SvPVX_const(*argsvp), SvCUR(*argsvp))
+ : &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) {
+ const 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;
+ PERL_UNUSED_ARG(cv);
+ PERL_UNUSED_VAR(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;
+ PERL_UNUSED_ARG(cv);
+ PERL_UNUSED_VAR(mark);
+ XSRETURN_UV(PL_rehash_seed);
+}
+
+XS(XS_Internals_HvREHASH) /* Subject to change */
+{
+ dXSARGS;
+ if (SvROK(ST(0))) {
+ const HV * const 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:
+ */
https://perl5.git.perl.org / perl5.git / blobdiff