+/* universal.c
+ *
+ * Copyright (c) 1997-2002, Larry Wall
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Artistic License, as specified in the README file.
+ *
+ */
+
+/*
+ * "The roots of those mountains must be roots indeed; there must be
+ * great secrets buried there which have not been discovered since the
+ * beginning." --Gandalf, relating Gollum's story
+ */
+
#include "EXTERN.h"
+#define PERL_IN_UNIVERSAL_C
#include "perl.h"
/*
*/
STATIC SV *
-isa_lookup(HV *stash, char *name, int len, int level)
+S_isa_lookup(pTHX_ HV *stash, const char *name, HV* name_stash,
+ int len, int level)
{
AV* av;
GV* gv;
GV** gvp;
HV* hv = Nullhv;
+ SV* subgen = Nullsv;
- if (!stash)
- return &PL_sv_undef;
+ /* 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(strEQ(HvNAME(stash), name))
+ if (strEQ(HvNAME(stash), name))
return &PL_sv_yes;
if (level > 100)
- croak("Recursive inheritance detected in package '%s'", HvNAME(stash));
+ 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 && (hv = GvHV(gv))) {
- SV* sv;
- SV** svp = (SV**)hv_fetch(hv, name, len, FALSE);
- if (svp && (sv = *svp) != (SV*)&PL_sv_undef)
- return sv;
+ 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) {
+ 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);
- hv = GvHVn(gv);
+ if (!hv)
+ hv = GvHVn(gv);
+ if (!subgen) {
+ subgen = newSViv(PL_sub_generation);
+ GvSV(gv) = subgen;
+ }
}
- if(hv) {
+ if (hv) {
SV** svp = AvARRAY(av);
/* NOTE: No support for tied ISA */
I32 items = AvFILLp(av) + 1;
SV* sv = *svp++;
HV* basestash = gv_stashsv(sv, FALSE);
if (!basestash) {
- dTHR;
if (ckWARN(WARN_MISC))
- warner(WARN_SYNTAX,
+ Perl_warner(aTHX_ packWARN(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)) {
+ if (&PL_sv_yes == isa_lookup(basestash, name, name_stash,
+ len, level + 1)) {
(void)hv_store(hv,name,len,&PL_sv_yes,0);
return &PL_sv_yes;
}
return boolSV(strEQ(name, "UNIVERSAL"));
}
+/*
+=head1 SV Manipulation Functions
+
+=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 *sv, char *name)
+Perl_sv_derived_from(pTHX_ SV *sv, const char *name)
{
- SV *rv;
char *type;
HV *stash;
-
+ HV *name_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))
+ if (SvOBJECT(sv))
stash = SvSTASH(sv);
}
else {
stash = gv_stashsv(sv, FALSE);
}
-
+
+ name_stash = gv_stashpv(name, FALSE);
+
return (type && strEQ(type,name)) ||
- (stash && isa_lookup(stash, name, strlen(name), 0) == &PL_sv_yes)
+ (stash && isa_lookup(stash, name, name_stash, strlen(name), 0)
+ == &PL_sv_yes)
? TRUE
: FALSE ;
-
}
-#ifdef PERL_OBJECT
-#define NO_XSLOCKS
-#endif /* PERL_OBJECT */
-
#include "XSUB.h"
-static
+void XS_UNIVERSAL_isa(pTHX_ CV *cv);
+void XS_UNIVERSAL_can(pTHX_ CV *cv);
+void XS_UNIVERSAL_VERSION(pTHX_ CV *cv);
+XS(XS_utf8_valid);
+XS(XS_utf8_encode);
+XS(XS_utf8_decode);
+XS(XS_utf8_upgrade);
+XS(XS_utf8_downgrade);
+XS(XS_utf8_unicode_to_native);
+XS(XS_utf8_native_to_unicode);
+
+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);
+ newXS("utf8::valid", XS_utf8_valid, file);
+ newXS("utf8::encode", XS_utf8_encode, file);
+ newXS("utf8::decode", XS_utf8_decode, file);
+ newXS("utf8::upgrade", XS_utf8_upgrade, file);
+ newXS("utf8::downgrade", XS_utf8_downgrade, file);
+ newXS("utf8::native_to_unicode", XS_utf8_native_to_unicode, file);
+ newXS("utf8::unicode_to_native", XS_utf8_unicode_to_native, file);
+}
+
+
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),PL_na);
+
+ 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);
}
-static
XS(XS_UNIVERSAL_can)
{
dXSARGS;
char *name;
SV *rv;
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),PL_na);
+
+ 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)) {
+ if (SvROK(sv)) {
sv = (SV*)SvRV(sv);
- if(SvOBJECT(sv))
+ if (SvOBJECT(sv))
pkg = SvSTASH(sv);
}
else {
XSRETURN(1);
}
-static
XS(XS_UNIVERSAL_VERSION)
{
dXSARGS;
GV *gv;
SV *sv;
char *undef;
- double req;
- 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*)&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))))
- croak("%s version %s required--this is only version %s",
- HvNAME(pkg), SvPV(ST(1),PL_na), undef ? undef : SvPV(sv,PL_na));
+ if (items > 1) {
+ STRLEN len;
+ SV *req = ST(1);
+
+ if (undef) {
+ if (pkg)
+ Perl_croak(aTHX_
+ "%s does not define $%s::VERSION--version check failed",
+ HvNAME(pkg), HvNAME(pkg));
+ else {
+ char *str = SvPVx(ST(0), len);
+
+ Perl_croak(aTHX_
+ "%s defines neither package nor VERSION--version check failed", str);
+ }
+ }
+ 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_nolen(req), SvPV_nolen(sv));
+ }
+finish:
ST(0) = sv;
XSRETURN(1);
}
-#ifdef PERL_OBJECT
-#undef boot_core_UNIVERSAL
-#define boot_core_UNIVERSAL CPerlObj::Perl_boot_core_UNIVERSAL
-#define pPerl this
-#endif
+XS(XS_utf8_valid)
+{
+ dXSARGS;
+ if (items != 1)
+ Perl_croak(aTHX_ "Usage: utf8::valid(sv)");
+ {
+ SV * sv = ST(0);
+ {
+ STRLEN len;
+ char *s = SvPV(sv,len);
+ if (!SvUTF8(sv) || is_utf8_string((U8*)s,len))
+ XSRETURN_YES;
+ else
+ XSRETURN_NO;
+ }
+ }
+ XSRETURN_EMPTY;
+}
-void
-boot_core_UNIVERSAL(void)
+XS(XS_utf8_encode)
{
- char *file = __FILE__;
+ dXSARGS;
+ if (items != 1)
+ Perl_croak(aTHX_ "Usage: utf8::encode(sv)");
+ {
+ SV * sv = ST(0);
- newXS("UNIVERSAL::isa", XS_UNIVERSAL_isa, file);
- newXS("UNIVERSAL::can", XS_UNIVERSAL_can, file);
- newXS("UNIVERSAL::VERSION", XS_UNIVERSAL_VERSION, file);
+ sv_utf8_encode(sv);
+ }
+ XSRETURN_EMPTY;
}
+
+XS(XS_utf8_decode)
+{
+ dXSARGS;
+ if (items != 1)
+ Perl_croak(aTHX_ "Usage: utf8::decode(sv)");
+ {
+ SV * sv = ST(0);
+ bool RETVAL;
+
+ RETVAL = sv_utf8_decode(sv);
+ ST(0) = boolSV(RETVAL);
+ sv_2mortal(ST(0));
+ }
+ XSRETURN(1);
+}
+
+XS(XS_utf8_upgrade)
+{
+ dXSARGS;
+ if (items != 1)
+ Perl_croak(aTHX_ "Usage: utf8::upgrade(sv)");
+ {
+ SV * sv = ST(0);
+ STRLEN RETVAL;
+ dXSTARG;
+
+ RETVAL = sv_utf8_upgrade(sv);
+ XSprePUSH; PUSHi((IV)RETVAL);
+ }
+ XSRETURN(1);
+}
+
+XS(XS_utf8_downgrade)
+{
+ dXSARGS;
+ if (items < 1 || items > 2)
+ Perl_croak(aTHX_ "Usage: utf8::downgrade(sv, failok=0)");
+ {
+ SV * sv = ST(0);
+ bool failok;
+ bool RETVAL;
+
+ if (items < 2)
+ failok = 0;
+ else {
+ failok = (int)SvIV(ST(1));
+ }
+
+ RETVAL = sv_utf8_downgrade(sv, failok);
+ ST(0) = boolSV(RETVAL);
+ sv_2mortal(ST(0));
+ }
+ XSRETURN(1);
+}
+
+XS(XS_utf8_native_to_unicode)
+{
+ dXSARGS;
+ UV uv = SvUV(ST(0));
+
+ if (items > 1)
+ Perl_croak(aTHX_ "Usage: utf8::native_to_unicode(sv)");
+
+ ST(0) = sv_2mortal(newSViv(NATIVE_TO_UNI(uv)));
+ XSRETURN(1);
+}
+
+XS(XS_utf8_unicode_to_native)
+{
+ dXSARGS;
+ UV uv = SvUV(ST(0));
+
+ if (items > 1)
+ Perl_croak(aTHX_ "Usage: utf8::unicode_to_native(sv)");
+
+ ST(0) = sv_2mortal(newSViv(UNI_TO_NATIVE(uv)));
+ XSRETURN(1);
+}
+
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