#include "EXTERN.h"
+#define PERL_IN_UNIVERSAL_C
#include "perl.h"
-#include "XSUB.h"
/*
* Contributed by Graham Barr <Graham.Barr@tiuk.ti.com>
* The main guts of traverse_isa was actually copied from gv_fetchmeth
*/
-static SV *
-isa_lookup(stash, name, len, level)
-HV *stash;
-char *name;
-int len;
-int level;
+STATIC SV *
+S_isa_lookup(pTHX_ HV *stash, const char *name, int len, int level)
{
AV* av;
GV* gv;
HV* hv = Nullhv;
if (!stash)
- return &sv_undef;
+ return &PL_sv_undef;
if(strEQ(HvNAME(stash), name))
- return &sv_yes;
+ return &PL_sv_yes;
if (level > 100)
- croak("Recursive inheritance detected");
+ 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*)&sv_undef && (hv = GvHV(gv))) {
+ 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*)&sv_undef)
+ if (svp && (sv = *svp) != (SV*)&PL_sv_undef)
return sv;
}
gvp = (GV**)hv_fetch(stash,"ISA",3,FALSE);
- if (gvp && (gv = *gvp) != (GV*)&sv_undef && (av = GvAV(gv))) {
+ if (gvp && (gv = *gvp) != (GV*)&PL_sv_undef && (av = GvAV(gv))) {
if(!hv) {
gvp = (GV**)hv_fetch(stash, "::ISA::CACHE::", 14, TRUE);
}
if(hv) {
SV** svp = AvARRAY(av);
- I32 items = AvFILL(av) + 1;
+ /* NOTE: No support for tied ISA */
+ I32 items = AvFILLp(av) + 1;
while (items--) {
SV* sv = *svp++;
HV* basestash = gv_stashsv(sv, FALSE);
if (!basestash) {
- if (dowarn)
- warn("Can't locate package %s for @%s::ISA",
+ dTHR;
+ if (ckWARN(WARN_MISC))
+ Perl_warner(aTHX_ WARN_SYNTAX,
+ "Can't locate package %s for @%s::ISA",
SvPVX(sv), HvNAME(stash));
continue;
}
- if(&sv_yes == isa_lookup(basestash, name, len, level + 1)) {
- (void)hv_store(hv,name,len,&sv_yes,0);
- return &sv_yes;
+ if(&PL_sv_yes == isa_lookup(basestash, name, len, level + 1)) {
+ (void)hv_store(hv,name,len,&PL_sv_yes,0);
+ return &PL_sv_yes;
}
}
- (void)hv_store(hv,name,len,&sv_no,0);
+ (void)hv_store(hv,name,len,&PL_sv_no,0);
}
}
- return &sv_no;
+ return boolSV(strEQ(name, "UNIVERSAL"));
}
+/*
+=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.
+
+=cut
+*/
+
bool
-sv_derived_from(sv, name)
-SV * sv ;
-char * name ;
+Perl_sv_derived_from(pTHX_ SV *sv, const char *name)
{
SV *rv;
char *type;
}
return (type && strEQ(type,name)) ||
- (stash && isa_lookup(stash, name, strlen(name), 0) == &sv_yes)
+ (stash && isa_lookup(stash, name, 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);
+
+void
+Perl_boot_core_UNIVERSAL(pTHX)
+{
+ char *file = __FILE__;
+
+ newXS("UNIVERSAL::isa", XS_UNIVERSAL_isa, file);
+ newXS("UNIVERSAL::can", XS_UNIVERSAL_can, file);
+ newXS("UNIVERSAL::VERSION", XS_UNIVERSAL_VERSION, file);
+}
+
+#include "XSUB.h"
-static
XS(XS_UNIVERSAL_isa)
{
dXSARGS;
SV *sv;
char *name;
+ STRLEN n_a;
if (items != 2)
- croak("Usage: UNIVERSAL::isa(reference, kind)");
+ Perl_croak(aTHX_ "Usage: UNIVERSAL::isa(reference, kind)");
sv = ST(0);
- name = (char *)SvPV(ST(1),na);
- ST(0) = (sv_derived_from(sv, name) ? &sv_yes : &sv_no) ;
+ if (!SvOK(sv) || !(SvROK(sv) || SvCUR(sv)))
+ XSRETURN_UNDEF;
+ name = (char *)SvPV(ST(1),n_a);
+
+ ST(0) = boolSV(sv_derived_from(sv, name));
XSRETURN(1);
}
-static
XS(XS_UNIVERSAL_can)
{
dXSARGS;
SV *sv;
char *name;
SV *rv;
- GV *gv;
- CV *cvp;
HV *pkg = NULL;
+ STRLEN n_a;
if (items != 2)
- croak("Usage: UNIVERSAL::can(object-ref, method)");
+ Perl_croak(aTHX_ "Usage: UNIVERSAL::can(object-ref, method)");
sv = ST(0);
- name = (char *)SvPV(ST(1),na);
- rv = &sv_undef;
+
+ if (!SvOK(sv) || !(SvROK(sv) || SvCUR(sv)))
+ XSRETURN_UNDEF;
+
+ name = (char *)SvPV(ST(1),n_a);
+ rv = &PL_sv_undef;
if(SvROK(sv)) {
sv = (SV*)SvRV(sv);
}
if (pkg) {
- gv = gv_fetchmethod(pkg, name);
-
- if(gv && GvCV(gv)) {
- /* If the sub is only a stub then we may have a gv to AUTOLOAD */
- GV **gvp = (GV**)hv_fetch(GvSTASH(gv), name, strlen(name), TRUE);
- if(gvp && (cvp = GvCV(*gvp))) {
- rv = sv_newmortal();
- sv_setsv(rv, newRV((SV*)cvp));
- }
- }
+ GV *gv = gv_fetchmethod_autoload(pkg, name, FALSE);
+ if (gv && isGV(gv))
+ rv = sv_2mortal(newRV((SV*)GvCV(gv)));
}
ST(0) = rv;
XSRETURN(1);
}
-static
XS(XS_UNIVERSAL_VERSION)
{
dXSARGS;
GV *gv;
SV *sv;
char *undef;
- double req;
+ NV req;
if(SvROK(ST(0))) {
sv = (SV*)SvRV(ST(0));
if(!SvOBJECT(sv))
- croak("Cannot find version of an unblessed reference");
+ Perl_croak(aTHX_ "Cannot find version of an unblessed reference");
pkg = SvSTASH(sv);
}
else {
gvp = pkg ? (GV**)hv_fetch(pkg,"VERSION",7,FALSE) : Null(GV**);
- if (gvp && (gv = *gvp) != (GV*)&sv_undef && (sv = GvSV(gv))) {
+ if (gvp && isGV(gv = *gvp) && SvOK(sv = GvSV(gv))) {
SV *nsv = sv_newmortal();
sv_setsv(nsv, sv);
sv = nsv;
undef = Nullch;
}
else {
- sv = (SV*)&sv_undef;
+ sv = (SV*)&PL_sv_undef;
undef = "(undef)";
}
- if (items > 1 && (undef || (req = SvNV(ST(1)), req > SvNV(sv))))
- croak("%s version %s required--this is only version %s",
- HvNAME(pkg), SvPV(ST(1),na), undef ? undef : SvPV(sv,na));
+ 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));
+ }
ST(0) = sv;
XSRETURN(1);
}
-void
-boot_core_UNIVERSAL()
-{
- char *file = __FILE__;
-
- newXS("UNIVERSAL::isa", XS_UNIVERSAL_isa, file);
- newXS("UNIVERSAL::can", XS_UNIVERSAL_can, file);
- newXS("UNIVERSAL::VERSION", XS_UNIVERSAL_VERSION, file);
-}
https://perl5.git.perl.org / perl5.git / blobdiff