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)
{
- SV *rv;
char *type;
HV *stash;
(stash && isa_lookup(stash, name, strlen(name), 0) == &PL_sv_yes)
? TRUE
: FALSE ;
-
}
void XS_UNIVERSAL_isa(pTHXo_ CV *cv);
newXS("UNIVERSAL::VERSION", XS_UNIVERSAL_VERSION, file);
}
-#ifdef PERL_OBJECT
-#define NO_XSLOCKS
-#endif /* PERL_OBJECT */
-
#include "XSUB.h"
XS(XS_UNIVERSAL_isa)
Perl_croak(aTHX_ "Usage: UNIVERSAL::isa(reference, kind)");
sv = ST(0);
+
+ if (SvGMAGICAL(sv))
+ mg_get(sv);
+
+ if (!SvOK(sv) || !(SvROK(sv) || SvCUR(sv)))
+ XSRETURN_UNDEF;
+
name = (char *)SvPV(ST(1),n_a);
ST(0) = boolSV(sv_derived_from(sv, name));
Perl_croak(aTHX_ "Usage: UNIVERSAL::can(object-ref, method)");
sv = ST(0);
+
+ if (SvGMAGICAL(sv))
+ mg_get(sv);
+
+ if (!SvOK(sv) || !(SvROK(sv) || SvCUR(sv)))
+ XSRETURN_UNDEF;
+
name = (char *)SvPV(ST(1),n_a);
rv = &PL_sv_undef;
GV *gv;
SV *sv;
char *undef;
- NV req;
- 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);
}
gvp = pkg ? (GV**)hv_fetch(pkg,"VERSION",7,FALSE) : Null(GV**);
- if (gvp && (gv = *gvp) != (GV*)&PL_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 = "(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) {
+ 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);