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-rw-r--r--contrib/perl5/universal.c301
1 files changed, 0 insertions, 301 deletions
diff --git a/contrib/perl5/universal.c b/contrib/perl5/universal.c
deleted file mode 100644
index 12d31e5..0000000
--- a/contrib/perl5/universal.c
+++ /dev/null
@@ -1,301 +0,0 @@
-#include "EXTERN.h"
-#define PERL_IN_UNIVERSAL_C
-#include "perl.h"
-
-/*
- * Contributed by Graham Barr <Graham.Barr@tiuk.ti.com>
- * The main guts of traverse_isa was actually copied from gv_fetchmeth
- */
-
-STATIC SV *
-S_isa_lookup(pTHX_ HV *stash, const char *name, int len, int level)
-{
- AV* av;
- GV* gv;
- GV** gvp;
- HV* hv = Nullhv;
- SV* subgen = Nullsv;
-
- if (!stash)
- return &PL_sv_undef;
-
- if (strEQ(HvNAME(stash), name))
- return &PL_sv_yes;
-
- if (level > 100)
- 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*)&PL_sv_undef && (subgen = GvSV(gv))
- && (hv = GvHV(gv)))
- {
- if (SvIV(subgen) == PL_sub_generation) {
- SV* sv;
- SV** 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)) );
- return sv;
- }
- }
- else {
- DEBUG_o( Perl_deb(aTHX_ "ISA Cache in package %s is stale\n",
- HvNAME(stash)) );
- hv_clear(hv);
- sv_setiv(subgen, PL_sub_generation);
- }
- }
-
- gvp = (GV**)hv_fetch(stash,"ISA",3,FALSE);
-
- if (gvp && (gv = *gvp) != (GV*)&PL_sv_undef && (av = GvAV(gv))) {
- if (!hv || !subgen) {
- gvp = (GV**)hv_fetch(stash, "::ISA::CACHE::", 14, TRUE);
-
- gv = *gvp;
-
- if (SvTYPE(gv) != SVt_PVGV)
- gv_init(gv, stash, "::ISA::CACHE::", 14, TRUE);
-
- if (!hv)
- hv = GvHVn(gv);
- if (!subgen) {
- subgen = newSViv(PL_sub_generation);
- GvSV(gv) = subgen;
- }
- }
- if (hv) {
- SV** svp = AvARRAY(av);
- /* 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 (ckWARN(WARN_MISC))
- Perl_warner(aTHX_ WARN_SYNTAX,
- "Can't locate package %s for @%s::ISA",
- SvPVX(sv), HvNAME(stash));
- continue;
- }
- 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,&PL_sv_no,0);
- }
- }
-
- 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);
-}
-
-#include "XSUB.h"
-
-XS(XS_UNIVERSAL_isa)
-{
- dXSARGS;
- SV *sv;
- char *name;
- STRLEN n_a;
-
- if (items != 2)
- Perl_croak(aTHX_ "Usage: UNIVERSAL::isa(reference, kind)");
-
- sv = ST(0);
-
- if (SvGMAGICAL(sv))
- mg_get(sv);
-
- if (!SvOK(sv) || !(SvROK(sv) || (SvPOK(sv) && SvCUR(sv))))
- XSRETURN_UNDEF;
-
- name = (char *)SvPV(ST(1),n_a);
-
- ST(0) = boolSV(sv_derived_from(sv, name));
- XSRETURN(1);
-}
-
-XS(XS_UNIVERSAL_can)
-{
- dXSARGS;
- SV *sv;
- 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);
-
- if (!SvOK(sv) || !(SvROK(sv) || (SvPOK(sv) && SvCUR(sv))))
- XSRETURN_UNDEF;
-
- 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);
-}
-
-XS(XS_UNIVERSAL_VERSION)
-{
- dXSARGS;
- HV *pkg;
- GV **gvp;
- GV *gv;
- SV *sv;
- char *undef;
-
- if (SvROK(ST(0))) {
- sv = (SV*)SvRV(ST(0));
- if (!SvOBJECT(sv))
- Perl_croak(aTHX_ "Cannot find version of an unblessed reference");
- pkg = SvSTASH(sv);
- }
- else {
- pkg = gv_stashsv(ST(0), FALSE);
- }
-
- gvp = pkg ? (GV**)hv_fetch(pkg,"VERSION",7,FALSE) : Null(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*)&PL_sv_undef;
- undef = "(undef)";
- }
-
- 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 (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);
- }
- }
- /* 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);
- }
-
- 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);
-}
-
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