/* universal.c
*
- * Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
- * by Larry Wall and others
+ * Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
+ * 2005, by Larry Wall and others
*
* You may distribute under the terms of either the GNU General Public
* License or the Artistic License, as specified in the README file.
* beginning." --Gandalf, relating Gollum's story
*/
+/* This file contains the code that implements the functions in Perl's
+ * UNIVERSAL package, such as UNIVERSAL->can().
+ */
+
#include "EXTERN.h"
#define PERL_IN_UNIVERSAL_C
#include "perl.h"
if (strEQ(HvNAME(stash), name))
return &PL_sv_yes;
+ if (strEQ(name, "UNIVERSAL"))
+ return &PL_sv_yes;
+
if (level > 100)
Perl_croak(aTHX_ "Recursive inheritance detected in package '%s'",
HvNAME(stash));
(void)hv_store(hv,name,len,&PL_sv_no,0);
}
}
-
- return boolSV(strEQ(name, "UNIVERSAL"));
+ return &PL_sv_no;
}
/*
bool
Perl_sv_derived_from(pTHX_ SV *sv, const char *name)
{
- char *type;
+ const char *type;
HV *stash;
HV *name_stash;
XS(XS_version_vcmp);
XS(XS_version_boolean);
XS(XS_version_noop);
+XS(XS_version_is_alpha);
+XS(XS_version_qv);
XS(XS_utf8_is_utf8);
XS(XS_utf8_valid);
XS(XS_utf8_encode);
XS(XS_Internals_hv_clear_placehold);
XS(XS_PerlIO_get_layers);
XS(XS_Regexp_DESTROY);
+XS(XS_Internals_hash_seed);
+XS(XS_Internals_rehash_seed);
+XS(XS_Internals_HvREHASH);
void
Perl_boot_core_UNIVERSAL(pTHX)
{
- char *file = __FILE__;
+ const char file[] = __FILE__;
newXS("UNIVERSAL::isa", XS_UNIVERSAL_isa, file);
newXS("UNIVERSAL::can", XS_UNIVERSAL_can, file);
newXS("version::boolean", XS_version_boolean, file);
newXS("version::(nomethod", XS_version_noop, file);
newXS("version::noop", XS_version_noop, file);
+ newXS("version::is_alpha", XS_version_is_alpha, file);
+ newXS("version::qv", XS_version_qv, file);
}
newXS("utf8::is_utf8", XS_utf8_is_utf8, file);
newXS("utf8::valid", XS_utf8_valid, file);
newXSproto("PerlIO::get_layers",
XS_PerlIO_get_layers, file, "*;@");
newXS("Regexp::DESTROY", XS_Regexp_DESTROY, file);
+ newXSproto("Internals::hash_seed",XS_Internals_hash_seed, file, "");
+ newXSproto("Internals::rehash_seed",XS_Internals_rehash_seed, file, "");
+ newXSproto("Internals::HvREHASH", XS_Internals_HvREHASH, file, "\\%");
}
{
dXSARGS;
SV *sv;
- char *name;
+ const char *name;
STRLEN n_a;
+ (void)cv;
if (items != 2)
Perl_croak(aTHX_ "Usage: UNIVERSAL::isa(reference, kind)");
|| (SvGMAGICAL(sv) && SvPOKp(sv) && SvCUR(sv))))
XSRETURN_UNDEF;
- name = (char *)SvPV(ST(1),n_a);
+ name = (const char *)SvPV(ST(1),n_a);
ST(0) = boolSV(sv_derived_from(sv, name));
XSRETURN(1);
{
dXSARGS;
SV *sv;
- char *name;
+ const char *name;
SV *rv;
HV *pkg = NULL;
STRLEN n_a;
+ (void)cv;
if (items != 2)
Perl_croak(aTHX_ "Usage: UNIVERSAL::can(object-ref, method)");
|| (SvGMAGICAL(sv) && SvPOKp(sv) && SvCUR(sv))))
XSRETURN_UNDEF;
- name = (char *)SvPV(ST(1),n_a);
+ name = (const char *)SvPV(ST(1),n_a);
rv = &PL_sv_undef;
if (SvROK(sv)) {
GV **gvp;
GV *gv;
SV *sv;
- char *undef;
+ const char *undef;
+ (void)cv;
if (SvROK(ST(0))) {
sv = (SV*)SvRV(ST(0));
SV *nsv = sv_newmortal();
sv_setsv(nsv, sv);
sv = nsv;
+ if ( !sv_derived_from(sv, "version"))
+ upg_version(sv);
undef = Nullch;
}
else {
"%s does not define $%s::VERSION--version check failed",
HvNAME(pkg), HvNAME(pkg));
else {
- char *str = SvPVx(ST(0), len);
+ const char *str = SvPVx(ST(0), len);
Perl_croak(aTHX_
"%s defines neither package nor VERSION--version check failed", str);
}
}
- if ( !sv_derived_from(sv, "version"))
- sv = new_version(sv);
- if ( !sv_derived_from(req, "version"))
- req = new_version(req);
+ if ( !sv_derived_from(req, "version")) {
+ /* req may very well be R/O, so create a new object */
+ SV *nsv = sv_newmortal();
+ sv_setsv(nsv, req);
+ req = nsv;
+ upg_version(req);
+ }
- if ( vcmp( SvRV(req), SvRV(sv) ) > 0 )
- Perl_croak(aTHX_
- "%s version %"SVf" required--this is only version %"SVf,
- HvNAME(pkg), req, sv);
+ if ( vcmp( req, sv ) > 0 )
+ Perl_croak(aTHX_ "%s version %"SVf" (%"SVf") required--"
+ "this is only version %"SVf" (%"SVf")", HvNAME(pkg),
+ vnumify(req),vnormal(req),vnumify(sv),vnormal(sv));
}
- ST(0) = sv;
+ if ( SvOK(sv) && sv_derived_from(sv, "version") ) {
+ ST(0) = vnumify(sv);
+ } else {
+ ST(0) = sv;
+ }
XSRETURN(1);
}
XS(XS_version_new)
{
dXSARGS;
+ (void)cv;
if (items > 3)
Perl_croak(aTHX_ "Usage: version::new(class, version)");
SP -= items;
{
-/* char * class = (char *)SvPV_nolen(ST(0)); */
- SV *version = ST(1);
+ const char *classname = SvPV_nolen(ST(0));
+ SV *vs = ST(1);
+ SV *rv;
if (items == 3 )
{
- char *vs = savepvn(SvPVX(ST(2)),SvCUR(ST(2)));
- version = Perl_newSVpvf(aTHX_ "v%s",vs);
+ vs = sv_newmortal();
+ Perl_sv_setpvf(aTHX_ vs,"v%s",SvPV_nolen(ST(2)));
}
- PUSHs(new_version(version));
+ rv = new_version(vs);
+ if ( strcmp(classname,"version") != 0 ) /* inherited new() */
+ sv_bless(rv, gv_stashpv(classname,TRUE));
+
+ PUSHs(sv_2mortal(rv));
PUTBACK;
return;
}
XS(XS_version_stringify)
{
dXSARGS;
+ (void)cv;
if (items < 1)
Perl_croak(aTHX_ "Usage: version::stringify(lobj, ...)");
SP -= items;
else
Perl_croak(aTHX_ "lobj is not of type version");
- {
- PUSHs(vstringify(lobj));
- }
+ PUSHs(sv_2mortal(vstringify(lobj)));
PUTBACK;
return;
XS(XS_version_numify)
{
dXSARGS;
+ (void)cv;
if (items < 1)
Perl_croak(aTHX_ "Usage: version::numify(lobj, ...)");
SP -= items;
else
Perl_croak(aTHX_ "lobj is not of type version");
- {
- PUSHs(vnumify(lobj));
- }
+ PUSHs(sv_2mortal(vnumify(lobj)));
PUTBACK;
return;
XS(XS_version_vcmp)
{
dXSARGS;
+ (void)cv;
if (items < 1)
Perl_croak(aTHX_ "Usage: version::vcmp(lobj, ...)");
SP -= items;
rs = newSViv(vcmp(lobj,rvs));
}
- PUSHs(rs);
+ PUSHs(sv_2mortal(rs));
}
PUTBACK;
XS(XS_version_boolean)
{
dXSARGS;
+ (void)cv;
if (items < 1)
Perl_croak(aTHX_ "Usage: version::boolean(lobj, ...)");
SP -= items;
SV * lobj;
if (sv_derived_from(ST(0), "version")) {
+ /* XXX If tmp serves a purpose, explain it. */
SV *tmp = SvRV(ST(0));
lobj = tmp;
}
{
SV *rs;
rs = newSViv( vcmp(lobj,new_version(newSVpvn("0",1))) );
- PUSHs(rs);
+ PUSHs(sv_2mortal(rs));
}
PUTBACK;
XS(XS_version_noop)
{
dXSARGS;
+ (void)cv;
if (items < 1)
Perl_croak(aTHX_ "Usage: version::noop(lobj, ...)");
{
XSRETURN_EMPTY;
}
+XS(XS_version_is_alpha)
+{
+ dXSARGS;
+ (void)cv;
+ if (items != 1)
+ Perl_croak(aTHX_ "Usage: version::is_alpha(lobj)");
+ SP -= items;
+ {
+ SV *lobj;
+
+ if (sv_derived_from(ST(0), "version")) {
+ /* XXX If tmp serves a purpose, explain it. */
+ SV *tmp = SvRV(ST(0));
+ lobj = tmp;
+ }
+ else
+ Perl_croak(aTHX_ "lobj is not of type version");
+{
+ const I32 len = av_len((AV *)lobj);
+ const I32 digit = SvIVX(*av_fetch((AV *)lobj, len, 0));
+ if ( digit < 0 )
+ XSRETURN_YES;
+ else
+ XSRETURN_NO;
+}
+ PUTBACK;
+ return;
+ }
+}
+
+XS(XS_version_qv)
+{
+ dXSARGS;
+ (void)cv;
+ if (items != 1)
+ Perl_croak(aTHX_ "Usage: version::qv(ver)");
+ SP -= items;
+ {
+ SV * ver = ST(0);
+ if ( !SvVOK(ver) ) /* only need to do with if not already v-string */
+ {
+ SV *vs = sv_newmortal();
+ char *version;
+ if ( SvNOK(ver) ) /* may get too much accuracy */
+ {
+ char tbuf[64];
+ sprintf(tbuf,"%.9"NVgf, SvNVX(ver));
+ version = savepv(tbuf);
+ }
+ else
+ {
+ version = savesvpv(ver);
+ }
+ (void)scan_version(version,vs,TRUE);
+ Safefree(version);
+
+ PUSHs(vs);
+ }
+ else
+ {
+ PUSHs(sv_2mortal(new_version(ver)));
+ }
+
+ PUTBACK;
+ return;
+ }
+}
+
XS(XS_utf8_is_utf8)
{
dXSARGS;
+ (void)cv;
if (items != 1)
Perl_croak(aTHX_ "Usage: utf8::is_utf8(sv)");
{
- SV * sv = ST(0);
+ const SV *sv = ST(0);
{
if (SvUTF8(sv))
XSRETURN_YES;
XS(XS_utf8_valid)
{
dXSARGS;
+ (void)cv;
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))
+ const char *s = SvPV(sv,len);
+ if (!SvUTF8(sv) || is_utf8_string((const U8*)s,len))
XSRETURN_YES;
else
XSRETURN_NO;
XS(XS_utf8_encode)
{
dXSARGS;
+ (void)cv;
if (items != 1)
Perl_croak(aTHX_ "Usage: utf8::encode(sv)");
{
XS(XS_utf8_decode)
{
dXSARGS;
+ (void)cv;
if (items != 1)
Perl_croak(aTHX_ "Usage: utf8::decode(sv)");
{
SV * sv = ST(0);
- bool RETVAL;
-
- RETVAL = sv_utf8_decode(sv);
+ const bool RETVAL = sv_utf8_decode(sv);
ST(0) = boolSV(RETVAL);
sv_2mortal(ST(0));
}
XS(XS_utf8_upgrade)
{
dXSARGS;
+ (void)cv;
if (items != 1)
Perl_croak(aTHX_ "Usage: utf8::upgrade(sv)");
{
XS(XS_utf8_downgrade)
{
dXSARGS;
+ (void)cv;
if (items < 1 || items > 2)
Perl_croak(aTHX_ "Usage: utf8::downgrade(sv, failok=0)");
{
SV * sv = ST(0);
- bool failok;
- bool RETVAL;
+ const bool failok = (items < 2) ? 0 : (int)SvIV(ST(1));
+ const bool RETVAL = sv_utf8_downgrade(sv, failok);
- 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));
}
XS(XS_utf8_native_to_unicode)
{
dXSARGS;
- UV uv = SvUV(ST(0));
+ const UV uv = SvUV(ST(0));
+ (void)cv;
if (items > 1)
Perl_croak(aTHX_ "Usage: utf8::native_to_unicode(sv)");
XS(XS_utf8_unicode_to_native)
{
dXSARGS;
- UV uv = SvUV(ST(0));
+ const UV uv = SvUV(ST(0));
+ (void)cv;
if (items > 1)
Perl_croak(aTHX_ "Usage: utf8::unicode_to_native(sv)");
{
dXSARGS;
SV *sv = SvRV(ST(0));
+ (void)cv;
+
if (items == 1) {
if (SvREADONLY(sv))
XSRETURN_YES;
{
dXSARGS;
SV *sv = SvRV(ST(0));
+ (void)cv;
+
if (items == 1)
XSRETURN_IV(SvREFCNT(sv) - 1); /* Minus the ref created for us. */
else if (items == 2) {
XSRETURN_UNDEF; /* Can't happen. */
}
-/* Maybe this should return the number of placeholders found in scalar context,
- and a list of them in list context. */
XS(XS_Internals_hv_clear_placehold)
{
dXSARGS;
HV *hv = (HV *) SvRV(ST(0));
+ (void)cv;
- /* I don't care how many parameters were passed in, but I want to avoid
- the unused variable warning. */
-
- items = (I32)HvPLACEHOLDERS(hv);
-
- if (items) {
- HE *entry;
- I32 riter = HvRITER(hv);
- HE *eiter = HvEITER(hv);
- hv_iterinit(hv);
- /* This may look suboptimal with the items *after* the iternext, but
- it's quite deliberate. We only get here with items==0 if we've
- just deleted the last placeholder in the hash. If we've just done
- that then it means that the hash is in lazy delete mode, and the
- HE is now only referenced in our iterator. If we just quit the loop
- and discarded our iterator then the HE leaks. So we do the && the
- other way to ensure iternext is called just one more time, which
- has the side effect of triggering the lazy delete. */
- while ((entry = hv_iternext_flags(hv, HV_ITERNEXT_WANTPLACEHOLDERS))
- && items) {
- SV *val = hv_iterval(hv, entry);
-
- if (val == &PL_sv_undef) {
-
- /* It seems that I have to go back in the front of the hash
- API to delete a hash, even though I have a HE structure
- pointing to the very entry I want to delete, and could hold
- onto the previous HE that points to it. And it's easier to
- go in with SVs as I can then specify the precomputed hash,
- and don't have fun and games with utf8 keys. */
- SV *key = hv_iterkeysv(entry);
-
- hv_delete_ent (hv, key, G_DISCARD, HeHASH(entry));
- items--;
- }
- }
- HvRITER(hv) = riter;
- HvEITER(hv) = eiter;
- }
-
+ if (items != 1)
+ Perl_croak(aTHX_ "Usage: UNIVERSAL::hv_clear_placeholders(hv)");
+ hv_clear_placeholders(hv);
XSRETURN(0);
}
XS(XS_Regexp_DESTROY)
{
-
+ (void)cv;
}
XS(XS_PerlIO_get_layers)
{
dXSARGS;
+ (void)cv;
if (items < 1 || items % 2 == 0)
Perl_croak(aTHX_ "Usage: PerlIO_get_layers(filehandle[,args])");
#ifdef USE_PERLIO
SV **varp = svp;
SV **valp = svp + 1;
STRLEN klen;
- char *key = SvPV(*varp, klen);
+ const char *key = SvPV(*varp, klen);
switch (*key) {
case 'i':
if (SvROK(sv) && isGV(SvRV(sv)))
gv = (GV*)SvRV(sv);
else
- gv = gv_fetchpv(SvPVX(sv), FALSE, SVt_PVIO);
+ gv = gv_fetchsv(sv, FALSE, SVt_PVIO);
}
if (gv && (io = GvIO(gv))) {
XSRETURN(0);
}
+XS(XS_Internals_hash_seed)
+{
+ /* Using dXSARGS would also have dITEM and dSP,
+ * which define 2 unused local variables. */
+ dMARK; dAX;
+ (void)cv;
+ XSRETURN_UV(PERL_HASH_SEED);
+}
+
+XS(XS_Internals_rehash_seed)
+{
+ /* Using dXSARGS would also have dITEM and dSP,
+ * which define 2 unused local variables. */
+ dMARK; dAX;
+ (void)cv;
+ XSRETURN_UV(PL_rehash_seed);
+}
+
+XS(XS_Internals_HvREHASH) /* Subject to change */
+{
+ dXSARGS;
+ (void)cv;
+ if (SvROK(ST(0))) {
+ const HV *hv = (HV *) SvRV(ST(0));
+ if (items == 1 && SvTYPE(hv) == SVt_PVHV) {
+ if (HvREHASH(hv))
+ XSRETURN_YES;
+ else
+ XSRETURN_NO;
+ }
+ }
+ Perl_croak(aTHX_ "Internals::HvREHASH $hashref");
+}
+
+/*
+ * Local variables:
+ * c-indentation-style: bsd
+ * c-basic-offset: 4
+ * indent-tabs-mode: t
+ * End:
+ *
+ * vim: shiftwidth=4:
+*/
projects / p5sagit/p5-mst-13.2.git / blobdiff