/* universal.c
*
* Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
- * 2005, by Larry Wall and others
+ * 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.
* The main guts of traverse_isa was actually copied from gv_fetchmeth
*/
-STATIC SV *
-S_isa_lookup(pTHX_ HV *stash, const char *name, HV* name_stash,
+STATIC bool
+S_isa_lookup(pTHX_ HV *stash, const char *name, const HV* const name_stash,
int len, int level)
{
+ dVAR;
AV* av;
GV* gv;
GV** gvp;
/* 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 (name_stash && ((const HV *)stash == name_stash))
+ return TRUE;
hvname = HvNAME_get(stash);
if (strEQ(hvname, name))
- return &PL_sv_yes;
+ return TRUE;
if (strEQ(name, "UNIVERSAL"))
- return &PL_sv_yes;
+ return TRUE;
if (level > 100)
Perl_croak(aTHX_ "Recursive inheritance detected in package '%s'",
hvname);
- gvp = (GV**)hv_fetch(stash, "::ISA::CACHE::", 14, FALSE);
+ gvp = (GV**)hv_fetchs(stash, "::ISA::CACHE::", FALSE);
if (gvp && (gv = *gvp) != (GV*)&PL_sv_undef && (subgen = GvSV(gv))
&& (hv = GvHV(gv)))
{
if (SvIV(subgen) == (IV)PL_sub_generation) {
- SV* sv;
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) );
- return sv;
+ if (svp) {
+ SV * const sv = *svp;
+#ifdef DEBUGGING
+ if (sv != &PL_sv_undef)
+ DEBUG_o( Perl_deb(aTHX_ "Using cached ISA %s for package %s\n",
+ name, hvname) );
+#endif
+ return (sv == &PL_sv_yes);
}
}
else {
}
}
- gvp = (GV**)hv_fetch(stash,"ISA",3,FALSE);
+ gvp = (GV**)hv_fetchs(stash, "ISA", FALSE);
if (gvp && (gv = *gvp) != (GV*)&PL_sv_undef && (av = GvAV(gv))) {
if (!hv || !subgen) {
- gvp = (GV**)hv_fetch(stash, "::ISA::CACHE::", 14, TRUE);
+ gvp = (GV**)hv_fetchs(stash, "::ISA::CACHE::", TRUE);
gv = *gvp;
if (ckWARN(WARN_MISC))
Perl_warner(aTHX_ packWARN(WARN_SYNTAX),
"Can't locate package %"SVf" for @%s::ISA",
- sv, hvname);
+ (void*)sv, hvname);
continue;
}
- if (&PL_sv_yes == isa_lookup(basestash, name, name_stash,
- len, level + 1)) {
+ if (isa_lookup(basestash, name, name_stash, len, level + 1)) {
(void)hv_store(hv,name,len,&PL_sv_yes,0);
- return &PL_sv_yes;
+ return TRUE;
}
}
(void)hv_store(hv,name,len,&PL_sv_no,0);
}
}
- return &PL_sv_no;
+ return FALSE;
}
/*
=for apidoc sv_derived_from
-Returns a boolean indicating whether the SV is derived from the specified
-class. This is the function that implements C<UNIVERSAL::isa>. It works
-for class names as well as for objects.
+Returns a boolean indicating whether the SV is derived from the specified class
+I<at the C level>. To check derivation at the Perl level, call C<isa()> as a
+normal Perl method.
=cut
*/
bool
Perl_sv_derived_from(pTHX_ SV *sv, const char *name)
{
+ dVAR;
HV *stash;
SvGETMAGIC(sv);
if (stash) {
HV * const name_stash = gv_stashpv(name, FALSE);
- return isa_lookup(stash, name, name_stash, strlen(name), 0) == &PL_sv_yes;
+ return isa_lookup(stash, name, name_stash, strlen(name), 0);
}
else
return FALSE;
}
+/*
+=for apidoc sv_does
+
+Returns a boolean indicating whether the SV performs a specific, named role.
+The SV can be a Perl object or the name of a Perl class.
+
+=cut
+*/
+
#include "XSUB.h"
+bool
+Perl_sv_does(pTHX_ SV *sv, const char *name)
+{
+ const char *classname;
+ bool does_it;
+
+ dSP;
+ ENTER;
+ SAVETMPS;
+
+ SvGETMAGIC(sv);
+
+ if (!SvOK(sv) || !(SvROK(sv) || (SvPOK(sv) && SvCUR(sv))
+ || (SvGMAGICAL(sv) && SvPOKp(sv) && SvCUR(sv))))
+ return FALSE;
+
+ if (sv_isobject(sv)) {
+ classname = sv_reftype(SvRV(sv),TRUE);
+ } else {
+ classname = SvPV(sv,PL_na);
+ }
+
+ if (strEQ(name,classname))
+ return TRUE;
+
+ PUSHMARK(SP);
+ XPUSHs(sv);
+ XPUSHs(sv_2mortal(newSVpv(name, 0)));
+ PUTBACK;
+
+ call_method("isa", G_SCALAR);
+ SPAGAIN;
+
+ does_it = SvTRUE( TOPs );
+ FREETMPS;
+ LEAVE;
+
+ return does_it;
+}
+
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_DOES(pTHX_ CV *cv);
PERL_XS_EXPORT_C void XS_UNIVERSAL_VERSION(pTHX_ CV *cv);
XS(XS_version_new);
XS(XS_version_stringify);
void
Perl_boot_core_UNIVERSAL(pTHX)
{
- const char file[] = __FILE__;
+ dVAR;
+ static const char file[] = __FILE__;
newXS("UNIVERSAL::isa", XS_UNIVERSAL_isa, file);
newXS("UNIVERSAL::can", XS_UNIVERSAL_can, file);
+ newXS("UNIVERSAL::DOES", XS_UNIVERSAL_DOES, file);
newXS("UNIVERSAL::VERSION", XS_UNIVERSAL_VERSION, file);
{
/* register the overloading (type 'A') magic */
XS(XS_UNIVERSAL_isa)
{
+ dVAR;
dXSARGS;
if (items != 2)
XS(XS_UNIVERSAL_can)
{
+ dVAR;
dXSARGS;
SV *sv;
const char *name;
XSRETURN(1);
}
+XS(XS_UNIVERSAL_DOES)
+{
+ dVAR;
+ dXSARGS;
+
+ if (items != 2)
+ Perl_croak(aTHX_ "Usage: invocant->does(kind)");
+ else {
+ SV * const sv = ST(0);
+ const char *name;
+
+ name = SvPV_nolen_const(ST(1));
+ if (sv_does( sv, name ))
+ XSRETURN_YES;
+
+ XSRETURN_NO;
+ }
+}
+
XS(XS_UNIVERSAL_VERSION)
{
+ dVAR;
dXSARGS;
HV *pkg;
GV **gvp;
pkg = gv_stashsv(ST(0), FALSE);
}
- gvp = pkg ? (GV**)hv_fetch(pkg,"VERSION",7,FALSE) : Null(GV**);
+ gvp = pkg ? (GV**)hv_fetchs(pkg, "VERSION", FALSE) : NULL;
if (gvp && isGV(gv = *gvp) && (sv = GvSV(gv)) && SvOK(sv)) {
SV * const nsv = sv_newmortal();
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));
+ "this is only version %"SVf" (%"SVf")", HvNAME_get(pkg),
+ (void*)vnumify(req),
+ (void*)vnormal(req),
+ (void*)vnumify(sv),
+ (void*)vnormal(sv));
}
if ( SvOK(sv) && sv_derived_from(sv, "version") ) {
XS(XS_version_new)
{
+ dVAR;
dXSARGS;
if (items > 3)
Perl_croak(aTHX_ "Usage: version::new(class, version)");
? 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);
- }
- else {
- /* create empty object */
- vs = sv_newmortal();
- sv_setpvn(vs,"",0);
- }
+ if ( items == 1 || vs == &PL_sv_undef ) { /* no param or explicit undef */
+ /* create empty object */
+ vs = sv_newmortal();
+ sv_setpvn(vs,"",0);
}
else if ( items == 3 ) {
vs = sv_newmortal();
XS(XS_version_stringify)
{
+ dVAR;
dXSARGS;
if (items < 1)
Perl_croak(aTHX_ "Usage: version::stringify(lobj, ...)");
XS(XS_version_numify)
{
+ dVAR;
dXSARGS;
if (items < 1)
Perl_croak(aTHX_ "Usage: version::numify(lobj, ...)");
XS(XS_version_normal)
{
+ dVAR;
dXSARGS;
if (items < 1)
Perl_croak(aTHX_ "Usage: version::normal(lobj, ...)");
XS(XS_version_vcmp)
{
+ dVAR;
dXSARGS;
if (items < 1)
Perl_croak(aTHX_ "Usage: version::vcmp(lobj, ...)");
XS(XS_version_boolean)
{
- dXSARGS;
- if (items < 1)
- Perl_croak(aTHX_ "Usage: version::boolean(lobj, ...)");
- SP -= items;
+ dVAR;
+ 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(newSVpvs("0"))) );
XS(XS_version_noop)
{
+ dVAR;
dXSARGS;
if (items < 1)
Perl_croak(aTHX_ "Usage: version::noop(lobj, ...)");
XS(XS_version_is_alpha)
{
+ dVAR;
dXSARGS;
if (items != 1)
Perl_croak(aTHX_ "Usage: version::is_alpha(lobj)");
XS(XS_version_qv)
{
+ dVAR;
dXSARGS;
if (items != 1)
Perl_croak(aTHX_ "Usage: version::qv(ver)");
if ( SvNOK(ver) ) /* may get too much accuracy */
{
char tbuf[64];
- const STRLEN len = my_sprintf(tbuf,"%.9"NVgf, SvNVX(ver));
+ const STRLEN len = my_snprintf(tbuf, sizeof(tbuf), "%.9"NVgf, SvNVX(ver));
version = savepvn(tbuf, len);
}
else
XS(XS_utf8_is_utf8)
{
+ dVAR;
dXSARGS;
if (items != 1)
Perl_croak(aTHX_ "Usage: utf8::is_utf8(sv)");
XS(XS_utf8_valid)
{
+ dVAR;
dXSARGS;
if (items != 1)
Perl_croak(aTHX_ "Usage: utf8::valid(sv)");
XS(XS_utf8_encode)
{
+ dVAR;
dXSARGS;
if (items != 1)
Perl_croak(aTHX_ "Usage: utf8::encode(sv)");
XS(XS_utf8_decode)
{
+ dVAR;
dXSARGS;
if (items != 1)
Perl_croak(aTHX_ "Usage: utf8::decode(sv)");
XS(XS_utf8_upgrade)
{
+ dVAR;
dXSARGS;
if (items != 1)
Perl_croak(aTHX_ "Usage: utf8::upgrade(sv)");
XS(XS_utf8_downgrade)
{
+ dVAR;
dXSARGS;
if (items < 1 || items > 2)
Perl_croak(aTHX_ "Usage: utf8::downgrade(sv, failok=0)");
XS(XS_utf8_native_to_unicode)
{
+ dVAR;
dXSARGS;
const UV uv = SvUV(ST(0));
XS(XS_utf8_unicode_to_native)
{
+ dVAR;
dXSARGS;
const UV uv = SvUV(ST(0));
XS(XS_Internals_SvREADONLY) /* This is dangerous stuff. */
{
+ dVAR;
dXSARGS;
SV * const sv = SvRV(ST(0));
XS(XS_Internals_SvREFCNT) /* This is dangerous stuff. */
{
+ dVAR;
dXSARGS;
SV * const sv = SvRV(ST(0));
XS(XS_Internals_hv_clear_placehold)
{
+ dVAR;
dXSARGS;
if (items != 1)
XS(XS_Regexp_DESTROY)
{
+ PERL_UNUSED_CONTEXT;
PERL_UNUSED_ARG(cv);
}
XS(XS_PerlIO_get_layers)
{
+ dVAR;
dXSARGS;
if (items < 1 || items % 2 == 0)
Perl_croak(aTHX_ "Usage: PerlIO_get_layers(filehandle[,args])");
else {
if (namok && argok)
XPUSHs(Perl_newSVpvf(aTHX_ "%"SVf"(%"SVf")",
- *namsvp, *argsvp));
+ (void*)*namsvp,
+ (void*)*argsvp));
else if (namok)
- XPUSHs(Perl_newSVpvf(aTHX_ "%"SVf, *namsvp));
+ XPUSHs(Perl_newSVpvf(aTHX_ "%"SVf,
+ (void*)*namsvp));
else
XPUSHs(&PL_sv_undef);
nitem++;
XS(XS_Internals_hash_seed)
{
+ dVAR;
/* Using dXSARGS would also have dITEM and dSP,
* which define 2 unused local variables. */
dAXMARK;
XS(XS_Internals_rehash_seed)
{
+ dVAR;
/* Using dXSARGS would also have dITEM and dSP,
* which define 2 unused local variables. */
dAXMARK;
XS(XS_Internals_HvREHASH) /* Subject to change */
{
+ dVAR;
dXSARGS;
if (SvROK(ST(0))) {
const HV * const hv = (HV *) SvRV(ST(0));
XS(XS_Internals_inc_sub_generation)
{
+ dVAR;
/* Using dXSARGS would also have dITEM and dSP,
* which define 2 unused local variables. */
dAXMARK;
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