#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
+Perl_sv_derived_from(pTHX_ SV *sv, const char *name)
+{
+ char *type;
+ HV *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))
+ stash = SvSTASH(sv);
+ }
+ else {
+ stash = gv_stashsv(sv, FALSE);
+ }
+
+ return (type && strEQ(type,name)) ||
+ (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);
}
-static
+#include "XSUB.h"
+
XS(XS_UNIVERSAL_isa)
{
dXSARGS;
- SV *sv, *rv;
+ 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);
- if (!SvROK(sv)) {
- rv = &sv_no;
- }
- else if((sv = (SV*)SvRV(sv)) && SvOBJECT(sv) &&
- &sv_yes == isa_lookup(SvSTASH(sv), name, strlen(name), 0)) {
- rv = &sv_yes;
- }
- else {
- char *s;
-
- switch (SvTYPE(sv)) {
- case SVt_NULL:
- case SVt_IV:
- case SVt_NV:
- case SVt_RV:
- case SVt_PV:
- case SVt_PVIV:
- case SVt_PVNV:
- case SVt_PVBM:
- case SVt_PVMG: s = "SCALAR"; break;
- case SVt_PVLV: s = "LVALUE"; break;
- case SVt_PVAV: s = "ARRAY"; break;
- case SVt_PVHV: s = "HASH"; break;
- case SVt_PVCV: s = "CODE"; break;
- case SVt_PVGV: s = "GLOB"; break;
- case SVt_PVFM: s = "FORMATLINE"; break;
- case SVt_PVIO: s = "FILEHANDLE"; break;
- default: s = "UNKNOWN"; break;
- }
- rv = strEQ(s,name) ? &sv_yes : &sv_no;
- }
+ if (SvGMAGICAL(sv))
+ mg_get(sv);
- ST(0) = rv;
+ 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(SvROK(sv) && (sv = (SV*)SvRV(sv)) && SvOBJECT(sv)) {
- gv = gv_fetchmethod(SvSTASH(sv), 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));
- }
- }
- }
- ST(0) = rv;
- XSRETURN(1);
-}
+ if (SvGMAGICAL(sv))
+ mg_get(sv);
-static
-XS(XS_UNIVERSAL_is_instance)
-{
- dXSARGS;
- ST(0) = SvROK(ST(0)) ? &sv_yes : &sv_no;
- XSRETURN(1);
-}
+ if (!SvOK(sv) || !(SvROK(sv) || SvCUR(sv)))
+ XSRETURN_UNDEF;
-static
-XS(XS_UNIVERSAL_class)
-{
- dXSARGS;
- if(SvROK(ST(0))) {
- SV *sv = sv_newmortal();
- sv_setpv(sv, HvNAME(SvSTASH(ST(0))));
- ST(0) = sv;
+ name = (char *)SvPV(ST(1),n_a);
+ rv = &PL_sv_undef;
+
+ if(SvROK(sv)) {
+ sv = (SV*)SvRV(sv);
+ if(SvOBJECT(sv))
+ pkg = SvSTASH(sv);
+ }
+ else {
+ pkg = gv_stashsv(sv, FALSE);
}
+
+ if (pkg) {
+ 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;
SV *sv;
char *undef;
- if(SvROK(ST(0))) {
+ if (SvROK(ST(0))) {
sv = (SV*)SvRV(ST(0));
- if(!SvOBJECT(sv))
- croak("Cannot find version of an unblessed reference");
+ if (!SvOBJECT(sv))
+ 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 || SvNV(ST(1)) > 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) {
+ STRLEN len;
+ SV *req = ST(1);
+
+ if (undef)
+ Perl_croak(aTHX_ "%s does not define $%s::VERSION--version check failed",
+ HvNAME(pkg), HvNAME(pkg));
+
+ 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 (len) {
+ if (SvNIOKp(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 version v%vd required--"
+ "this is only version v%vd",
+ 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);
+ }
+ }
+ /* 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 (SvNIOKp(req) && SvPOK(req)) {
+ NV n = SvNV(req);
+ req = sv_newmortal();
+ sv_setnv(req, n);
+ }
+
+ if (SvNV(req) > SvNV(sv))
+ Perl_croak(aTHX_ "%s version %s required--this is only version %s",
+ HvNAME(pkg), SvPV(req,len), SvPV(sv,len));
+ }
+finish:
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::class", XS_UNIVERSAL_class, file);
- newXS("UNIVERSAL::is_instance", XS_UNIVERSAL_is_instance, file);
- newXS("UNIVERSAL::VERSION", XS_UNIVERSAL_VERSION, file);
-}