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universal.c
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#line 2 "universal.c"
/* universal.c
*
* Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
* 2005, 2006, 2007, 2008 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.
*
*/
/*
* '"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 history
*
* [p.54 of _The Lord of the Rings_, I/ii: "The Shadow of the Past"]
*/
/* This file contains the code that implements the functions in Perl's
* UNIVERSAL package, such as UNIVERSAL->can().
*
* It is also used to store XS functions that need to be present in
* miniperl for a lack of a better place to put them. It might be
* clever to move them to separate XS files which would then be pulled
* in by some to-be-written build process.
*/
#include "EXTERN.h"
#define PERL_IN_UNIVERSAL_C
#include "perl.h"
#if defined(USE_PERLIO)
#include "perliol.h" /* For the PERLIO_F_XXX */
#endif
/*
* Contributed by Graham Barr <[email protected]>
* The main guts of traverse_isa was actually copied from gv_fetchmeth
*/
#define PERL_ARGS_ASSERT_ISA_LOOKUP \
assert(stash); \
assert(namesv || name)
STATIC bool
S_isa_lookup(pTHX_ HV *stash, SV *namesv, const char * name, STRLEN len, U32 flags)
{
const struct mro_meta *const meta = HvMROMETA(stash);
HV *isa = meta->isa;
const HV *our_stash;
PERL_ARGS_ASSERT_ISA_LOOKUP;
if (!isa) {
(void)mro_get_linear_isa(stash);
isa = meta->isa;
}
if (hv_common(isa, namesv, name, len, ( flags & SVf_UTF8 ? HVhek_UTF8 : 0),
HV_FETCH_ISEXISTS, NULL, 0)) {
/* Direct name lookup worked. */
return TRUE;
}
/* A stash/class can go by many names (ie. User == main::User), so
we use the HvENAME in the stash itself, which is canonical, falling
back to HvNAME if necessary. */
our_stash = gv_stashsvpvn_cached(namesv, name, len, flags);
if (our_stash) {
HEK *canon_name = HvENAME_HEK(our_stash);
if (!canon_name) canon_name = HvNAME_HEK(our_stash);
assert(canon_name);
if (hv_common(isa, NULL, HEK_KEY(canon_name), HEK_LEN(canon_name),
HEK_FLAGS(canon_name),
HV_FETCH_ISEXISTS, NULL, HEK_HASH(canon_name))) {
return TRUE;
}
}
return FALSE;
}
#define PERL_ARGS_ASSERT_SV_DERIVED_FROM_SVPVN \
assert(sv); \
assert(namesv || name)
STATIC bool
S_sv_derived_from_svpvn(pTHX_ SV *sv, SV *namesv, const char * name, const STRLEN len, U32 flags)
{
HV* stash;
PERL_ARGS_ASSERT_SV_DERIVED_FROM_SVPVN;
SvGETMAGIC(sv);
if (SvROK(sv)) {
const char *type;
sv = SvRV(sv);
type = sv_reftype(sv,0);
if (type) {
if (namesv)
name = SvPV_nolen(namesv);
if (strEQ(name, type))
return TRUE;
}
if (!SvOBJECT(sv))
return FALSE;
stash = SvSTASH(sv);
}
else {
stash = gv_stashsv(sv, 0);
}
if (stash && isa_lookup(stash, namesv, name, len, flags))
return TRUE;
stash = gv_stashpvs("UNIVERSAL", 0);
return stash && isa_lookup(stash, namesv, name, len, flags);
}
/*
=for apidoc_section $SV
=for apidoc sv_derived_from_pvn
Returns a boolean indicating whether the SV is derived from the specified class
I<at the C level>. To check derivation at the Perl level, call C<isa()> as a
normal Perl method.
Currently, the only significant value for C<flags> is SVf_UTF8.
=cut
=for apidoc sv_derived_from_sv
Exactly like L</sv_derived_from_pvn>, but takes the name string in the form
of an SV instead of a string/length pair. This is the advised form.
=cut
*/
bool
Perl_sv_derived_from_sv(pTHX_ SV *sv, SV *namesv, U32 flags)
{
PERL_ARGS_ASSERT_SV_DERIVED_FROM_SV;
return sv_derived_from_svpvn(sv, namesv, NULL, 0, flags);
}
/*
=for apidoc sv_derived_from
Exactly like L</sv_derived_from_pv>, but doesn't take a C<flags> parameter.
=cut
*/
bool
Perl_sv_derived_from(pTHX_ SV *sv, const char *const name)
{
PERL_ARGS_ASSERT_SV_DERIVED_FROM;
return sv_derived_from_svpvn(sv, NULL, name, strlen(name), 0);
}
/*
=for apidoc sv_derived_from_pv
Exactly like L</sv_derived_from_pvn>, but takes a nul-terminated string
instead of a string/length pair.
=cut
*/
bool
Perl_sv_derived_from_pv(pTHX_ SV *sv, const char *const name, U32 flags)
{
PERL_ARGS_ASSERT_SV_DERIVED_FROM_PV;
return sv_derived_from_svpvn(sv, NULL, name, strlen(name), flags);
}
bool
Perl_sv_derived_from_pvn(pTHX_ SV *sv, const char *const name, const STRLEN len, U32 flags)
{
PERL_ARGS_ASSERT_SV_DERIVED_FROM_PVN;
return sv_derived_from_svpvn(sv, NULL, name, len, flags);
}
/*
=for apidoc sv_derived_from_hv
Exactly like L</sv_derived_from_pvn>, but takes the name string as the
C<HvNAME> of the given HV (which would presumably represent a stash).
=cut
*/
bool
Perl_sv_derived_from_hv(pTHX_ SV *sv, HV *hv)
{
PERL_ARGS_ASSERT_SV_DERIVED_FROM_HV;
const char *hvname = HvNAME(hv);
if(!hvname)
return FALSE;
return sv_derived_from_svpvn(sv, NULL, hvname, HvNAMELEN(hv), HvNAMEUTF8(hv) ? SVf_UTF8 : 0);
}
/*
=for apidoc sv_isa_sv
Returns a boolean indicating whether the SV is an object reference and is
derived from the specified class, respecting any C<isa()> method overloading
it may have. Returns false if C<sv> is not a reference to an object, or is
not derived from the specified class.
This is the function used to implement the behaviour of the C<isa> operator.
Does not invoke magic on C<sv>.
Not to be confused with the older C<sv_isa> function, which does not use an
overloaded C<isa()> method, nor will check subclassing.
=cut
*/
bool
Perl_sv_isa_sv(pTHX_ SV *sv, SV *namesv)
{
GV *isagv;
PERL_ARGS_ASSERT_SV_ISA_SV;
if(!SvROK(sv) || !SvOBJECT(SvRV(sv)))
return FALSE;
isagv = gv_fetchmeth_pvn(SvSTASH(SvRV(sv)), "isa", 3, -1, GV_NOUNIVERSAL);
if(isagv) {
dSP;
CV *isacv = isGV(isagv) ? GvCV(isagv) : (CV *)isagv;
SV *retsv;
bool ret;
PUTBACK;
ENTER;
SAVETMPS;
EXTEND(SP, 2);
PUSHMARK(SP);
PUSHs(sv);
PUSHs(namesv);
PUTBACK;
call_sv((SV *)isacv, G_SCALAR);
SPAGAIN;
retsv = POPs;
ret = SvTRUE(retsv);
PUTBACK;
FREETMPS;
LEAVE;
return ret;
}
/* TODO: Support namesv being an HV ref to the stash directly? */
return sv_derived_from_sv(sv, namesv, 0);
}
/*
=for apidoc sv_does_sv
Returns a boolean indicating whether the SV performs a specific, named role.
The SV can be a Perl object or the name of a Perl class.
=cut
*/
#include "XSUB.h"
bool
Perl_sv_does_sv(pTHX_ SV *sv, SV *namesv, U32 flags)
{
SV *classname;
bool does_it;
SV *methodname;
dSP;
PERL_ARGS_ASSERT_SV_DOES_SV;
PERL_UNUSED_ARG(flags);
ENTER;
SAVETMPS;
SvGETMAGIC(sv);
if (!SvOK(sv) || !(SvROK(sv) || (SvPOK(sv) && SvCUR(sv)))) {
LEAVE;
return FALSE;
}
if (SvROK(sv) && SvOBJECT(SvRV(sv))) {
classname = sv_ref(NULL,SvRV(sv),TRUE);
} else {
classname = sv;
}
if (sv_eq(classname, namesv)) {
LEAVE;
return TRUE;
}
PUSHMARK(SP);
EXTEND(SP, 2);
PUSHs(sv);
PUSHs(namesv);
PUTBACK;
/* create a PV with value "isa", but with a special address
* so that perl knows we're really doing "DOES" instead */
methodname = newSV_type_mortal(SVt_PV);
SvLEN_set(methodname, 0);
SvCUR_set(methodname, strlen(PL_isa_DOES));
SvPVX(methodname) = (char *)PL_isa_DOES; /* discard 'const' qualifier */
SvPOK_on(methodname);
call_sv(methodname, G_SCALAR | G_METHOD);
SPAGAIN;
does_it = SvTRUE_NN( TOPs );
FREETMPS;
LEAVE;
return does_it;
}
/*
=for apidoc sv_does
Like L</sv_does_pv>, but doesn't take a C<flags> parameter.
=cut
*/
bool
Perl_sv_does(pTHX_ SV *sv, const char *const name)
{
PERL_ARGS_ASSERT_SV_DOES;
return sv_does_sv(sv, newSVpvn_flags(name, strlen(name), SVs_TEMP), 0);
}
/*
=for apidoc sv_does_pv
Like L</sv_does_sv>, but takes a nul-terminated string instead of an SV.
=cut
*/
bool
Perl_sv_does_pv(pTHX_ SV *sv, const char *const name, U32 flags)
{
PERL_ARGS_ASSERT_SV_DOES_PV;
return sv_does_sv(sv, newSVpvn_flags(name, strlen(name), SVs_TEMP | flags), flags);
}
/*
=for apidoc sv_does_pvn
Like L</sv_does_sv>, but takes a string/length pair instead of an SV.
=cut
*/
bool
Perl_sv_does_pvn(pTHX_ SV *sv, const char *const name, const STRLEN len, U32 flags)
{
PERL_ARGS_ASSERT_SV_DOES_PVN;
return sv_does_sv(sv, newSVpvn_flags(name, len, flags | SVs_TEMP), flags);
}
/*
=for apidoc croak_xs_usage
A specialised variant of C<croak()> for emitting the usage message for xsubs
croak_xs_usage(cv, "eee_yow");
works out the package name and subroutine name from C<cv>, and then calls
C<croak()>. Hence if C<cv> is C<&ouch::awk>, it would call C<croak> as:
Perl_croak(aTHX_ "Usage: %" SVf "::%" SVf "(%s)", "ouch" "awk",
"eee_yow");
=cut
*/
void
Perl_croak_xs_usage(const CV *const cv, const char *const params)
{
/* Avoid CvGV as it requires aTHX. */
const GV *gv = CvNAMED(cv) ? NULL : cv->sv_any->xcv_gv_u.xcv_gv;
PERL_ARGS_ASSERT_CROAK_XS_USAGE;
if (gv) got_gv: {
const HV *const stash = GvSTASH(gv);
if (HvNAME_get(stash))
/* diag_listed_as: SKIPME */
Perl_croak_nocontext("Usage: %" HEKf "::%" HEKf "(%s)",
HEKfARG(HvNAME_HEK(stash)),
HEKfARG(GvNAME_HEK(gv)),
params);
else
/* diag_listed_as: SKIPME */
Perl_croak_nocontext("Usage: %" HEKf "(%s)",
HEKfARG(GvNAME_HEK(gv)), params);
} else {
dTHX;
if ((gv = CvGV(cv))) goto got_gv;
/* Pants. I don't think that it should be possible to get here. */
/* diag_listed_as: SKIPME */
Perl_croak(aTHX_ "Usage: CODE(0x%" UVxf ")(%s)", PTR2UV(cv), params);
}
}
XS(XS_UNIVERSAL_isa); /* prototype to pass -Wmissing-prototypes */
XS(XS_UNIVERSAL_isa)
{
dXSARGS;
if (items != 2)
croak_xs_usage(cv, "reference, kind");
else {
SV * const sv = ST(0);
SvGETMAGIC(sv);
if (!SvOK(sv) || !(SvROK(sv) || (SvPOK(sv) && SvCUR(sv))))
XSRETURN_UNDEF;
ST(0) = boolSV(sv_derived_from_sv(sv, ST(1), 0));
XSRETURN(1);
}
}
XS(XS_UNIVERSAL_can); /* prototype to pass -Wmissing-prototypes */
XS(XS_UNIVERSAL_can)
{
dXSARGS;
SV *sv;
SV *rv;
HV *pkg = NULL;
GV *iogv;
if (items != 2)
croak_xs_usage(cv, "object-ref, method");
sv = ST(0);
SvGETMAGIC(sv);
/* Reject undef and empty string. Note that the string form takes
precedence here over the numeric form, as (!1)->foo treats the
invocant as the empty string, though it is a dualvar. */
if (!SvOK(sv) || (SvPOK(sv) && !SvCUR(sv)))
XSRETURN_UNDEF;
rv = &PL_sv_undef;
if (SvROK(sv)) {
sv = MUTABLE_SV(SvRV(sv));
if (SvOBJECT(sv))
pkg = SvSTASH(sv);
else if (isGV_with_GP(sv) && GvIO(sv))
pkg = SvSTASH(GvIO(sv));
}
else if (isGV_with_GP(sv) && GvIO(sv))
pkg = SvSTASH(GvIO(sv));
else if ((iogv = gv_fetchsv_nomg(sv, 0, SVt_PVIO)) && GvIO(iogv))
pkg = SvSTASH(GvIO(iogv));
else {
pkg = gv_stashsv(sv, 0);
if (!pkg)
pkg = gv_stashpvs("UNIVERSAL", 0);
}
if (pkg) {
GV * const gv = gv_fetchmethod_sv_flags(pkg, ST(1), 0);
if (gv && isGV(gv))
rv = sv_2mortal(newRV(MUTABLE_SV(GvCV(gv))));
}
ST(0) = rv;
XSRETURN(1);
}
XS(XS_UNIVERSAL_DOES); /* prototype to pass -Wmissing-prototypes */
XS(XS_UNIVERSAL_DOES)
{
dXSARGS;
PERL_UNUSED_ARG(cv);
if (items != 2)
Perl_croak(aTHX_ "Usage: invocant->DOES(kind)");
else {
SV * const sv = ST(0);
if (sv_does_sv( sv, ST(1), 0 ))
XSRETURN_YES;
XSRETURN_NO;
}
}
XS(XS_utf8_is_utf8); /* prototype to pass -Wmissing-prototypes */
XS(XS_utf8_is_utf8)
{
dXSARGS;
if (items != 1)
croak_xs_usage(cv, "sv");
else {
SV * const sv = ST(0);
SvGETMAGIC(sv);
if (SvUTF8(sv))
XSRETURN_YES;
else
XSRETURN_NO;
}
XSRETURN_EMPTY;
}
XS(XS_utf8_valid); /* prototype to pass -Wmissing-prototypes */
XS(XS_utf8_valid)
{
dXSARGS;
if (items != 1)
croak_xs_usage(cv, "sv");
else {
SV * const sv = ST(0);
STRLEN len;
const char * const s = SvPV_const(sv,len);
if (!SvUTF8(sv) || is_utf8_string((const U8*)s,len))
XSRETURN_YES;
else
XSRETURN_NO;
}
XSRETURN_EMPTY;
}
XS(XS_utf8_encode); /* prototype to pass -Wmissing-prototypes */
XS(XS_utf8_encode)
{
dXSARGS;
if (items != 1)
croak_xs_usage(cv, "sv");
sv_utf8_encode(ST(0));
SvSETMAGIC(ST(0));
XSRETURN_EMPTY;
}
XS(XS_utf8_decode); /* prototype to pass -Wmissing-prototypes */
XS(XS_utf8_decode)
{
dXSARGS;
if (items != 1)
croak_xs_usage(cv, "sv");
else {
SV * const sv = ST(0);
bool RETVAL;
SvPV_force_nolen(sv);
RETVAL = sv_utf8_decode(sv);
SvSETMAGIC(sv);
ST(0) = boolSV(RETVAL);
}
XSRETURN(1);
}
XS(XS_utf8_upgrade); /* prototype to pass -Wmissing-prototypes */
XS(XS_utf8_upgrade)
{
dXSARGS;
if (items != 1)
croak_xs_usage(cv, "sv");
else {
SV * const sv = ST(0);
STRLEN RETVAL;
dXSTARG;
RETVAL = sv_utf8_upgrade(sv);
XSprePUSH; PUSHi((IV)RETVAL);
}
XSRETURN(1);
}
XS(XS_utf8_downgrade); /* prototype to pass -Wmissing-prototypes */
XS(XS_utf8_downgrade)
{
dXSARGS;
if (items < 1 || items > 2)
croak_xs_usage(cv, "sv, failok=0");
else {
SV * const sv0 = ST(0);
SV * const sv1 = ST(1);
const bool failok = (items < 2) ? 0 : SvTRUE_NN(sv1) ? 1 : 0;
const bool RETVAL = sv_utf8_downgrade(sv0, failok);
ST(0) = boolSV(RETVAL);
}
XSRETURN(1);
}
XS(XS_utf8_native_to_unicode); /* prototype to pass -Wmissing-prototypes */
XS(XS_utf8_native_to_unicode)
{
dXSARGS;
const UV uv = SvUV(ST(0));
if (items > 1)
croak_xs_usage(cv, "sv");
ST(0) = sv_2mortal(newSVuv(NATIVE_TO_UNI(uv)));
XSRETURN(1);
}
XS(XS_utf8_unicode_to_native); /* prototype to pass -Wmissing-prototypes */
XS(XS_utf8_unicode_to_native)
{
dXSARGS;
const UV uv = SvUV(ST(0));
if (items > 1)
croak_xs_usage(cv, "sv");
ST(0) = sv_2mortal(newSVuv(UNI_TO_NATIVE(uv)));
XSRETURN(1);
}
XS(XS_Internals_SvREADONLY); /* prototype to pass -Wmissing-prototypes */
XS(XS_Internals_SvREADONLY) /* This is dangerous stuff. */
{
dXSARGS;
SV * const svz = ST(0);
SV * sv;
/* [perl #77776] - called as &foo() not foo() */
if (!SvROK(svz))
croak_xs_usage(cv, "SCALAR[, ON]");
sv = SvRV(svz);
if (items == 1) {
if (SvREADONLY(sv))
XSRETURN_YES;
else
XSRETURN_NO;
}
else if (items == 2) {
SV *sv1 = ST(1);
if (SvTRUE_NN(sv1)) {
SvFLAGS(sv) |= SVf_READONLY;
XSRETURN_YES;
}
else {
/* I hope you really know what you are doing. */
SvFLAGS(sv) &=~ SVf_READONLY;
XSRETURN_NO;
}
}
XSRETURN_UNDEF; /* Can't happen. */
}
XS(XS_constant__make_const); /* prototype to pass -Wmissing-prototypes */
XS(XS_constant__make_const) /* This is dangerous stuff. */
{
dXSARGS;
SV * const svz = ST(0);
SV * sv;
/* [perl #77776] - called as &foo() not foo() */
if (!SvROK(svz) || items != 1)
croak_xs_usage(cv, "SCALAR");
sv = SvRV(svz);
SvREADONLY_on(sv);
if (SvTYPE(sv) == SVt_PVAV && AvFILLp(sv) != -1) {
/* for constant.pm; nobody else should be calling this
on arrays anyway. */
SV **svp;
for (svp = AvARRAY(sv) + AvFILLp(sv)
; svp >= AvARRAY(sv)
; --svp)
if (*svp) SvPADTMP_on(*svp);
}
XSRETURN(0);
}
XS(XS_Internals_SvREFCNT); /* prototype to pass -Wmissing-prototypes */
XS(XS_Internals_SvREFCNT) /* This is dangerous stuff. */
{
dXSARGS;
SV * const svz = ST(0);
SV * sv;
U32 refcnt;
/* [perl #77776] - called as &foo() not foo() */
if ((items != 1 && items != 2) || !SvROK(svz))
croak_xs_usage(cv, "SCALAR[, REFCOUNT]");
sv = SvRV(svz);
/* I hope you really know what you are doing. */
/* idea is for SvREFCNT(sv) to be accessed only once */
refcnt = items == 2 ?
/* we free one ref on exit */
(SvREFCNT(sv) = SvUV(ST(1)) + 1)
: SvREFCNT(sv);
XSRETURN_UV(refcnt - 1); /* Minus the ref created for us. */
}
XS(XS_Internals_hv_clear_placehold); /* prototype to pass -Wmissing-prototypes */
XS(XS_Internals_hv_clear_placehold)
{
dXSARGS;
if (items != 1 || !SvROK(ST(0)))
croak_xs_usage(cv, "hv");
else {
HV * const hv = MUTABLE_HV(SvRV(ST(0)));
hv_clear_placeholders(hv);
XSRETURN(0);
}
}
XS(XS_PerlIO_get_layers); /* prototype to pass -Wmissing-prototypes */
XS(XS_PerlIO_get_layers)
{
dXSARGS;
if (items < 1 || items % 2 == 0)
croak_xs_usage(cv, "filehandle[,args]");
#if defined(USE_PERLIO)
{
SV * sv;
GV * gv;
IO * io = NULL;
bool input = TRUE;
bool details = FALSE;
if (items > 1) {
SV * const *svp;
for (svp = MARK + 2; svp <= SP; svp += 2) {
SV * const * const varp = svp;
SV * const * const valp = svp + 1;
STRLEN klen;
const char * const key = SvPV_const(*varp, klen);
switch (*key) {
case 'i':
if (memEQs(key, klen, "input")) {
input = SvTRUE(*valp);
break;
}
goto fail;
case 'o':
if (memEQs(key, klen, "output")) {
input = !SvTRUE(*valp);
break;
}
goto fail;
case 'd':
if (memEQs(key, klen, "details")) {
details = SvTRUE(*valp);
break;
}
goto fail;
default:
fail:
Perl_croak(aTHX_
"get_layers: unknown argument '%s'",
key);
}
}
SP -= (items - 1);
}
sv = POPs;
/* MAYBE_DEREF_GV will call get magic */
if ((gv = MAYBE_DEREF_GV(sv)))
io = GvIO(gv);
else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVIO)
io = (IO*)SvRV(sv);
else if (!SvROK(sv) && (gv = gv_fetchsv_nomg(sv, 0, SVt_PVIO)))
io = GvIO(gv);
if (io) {
AV* const av = PerlIO_get_layers(aTHX_ input ?
IoIFP(io) : IoOFP(io));
SSize_t i;
const SSize_t last = av_top_index(av);
SSize_t nitem = 0;
for (i = last; i >= 0; i -= 3) {
SV * const * const namsvp = av_fetch(av, i - 2, FALSE);
SV * const * const argsvp = av_fetch(av, i - 1, FALSE);
SV * const * const flgsvp = av_fetch(av, i, FALSE);
const bool namok = namsvp && *namsvp && SvPOK(*namsvp);
const bool argok = argsvp && *argsvp && SvPOK(*argsvp);
const bool flgok = flgsvp && *flgsvp && SvIOK(*flgsvp);
EXTEND(SP, 3); /* Three is the max in all branches: better check just once */
if (details) {
/* Indents of 5? Yuck. */
/* We know that PerlIO_get_layers creates a new SV for
the name and flags, so we can just take a reference
and "steal" it when we free the AV below. */
PUSHs(namok
? sv_2mortal(SvREFCNT_inc_simple_NN(*namsvp))
: &PL_sv_undef);
PUSHs(argok
? newSVpvn_flags(SvPVX_const(*argsvp),
SvCUR(*argsvp),
(SvUTF8(*argsvp) ? SVf_UTF8 : 0)
| SVs_TEMP)
: &PL_sv_undef);
PUSHs(flgok
? sv_2mortal(SvREFCNT_inc_simple_NN(*flgsvp))
: &PL_sv_undef);
nitem += 3;
}
else {
if (namok && argok)
PUSHs(sv_2mortal(Perl_newSVpvf(aTHX_ "%" SVf "(%" SVf ")",
SVfARG(*namsvp),
SVfARG(*argsvp))));
else if (namok)
PUSHs(sv_2mortal(SvREFCNT_inc_simple_NN(*namsvp)));
else
PUSHs(&PL_sv_undef);
nitem++;
if (flgok) {
const IV flags = SvIVX(*flgsvp);
if (flags & PERLIO_F_UTF8) {
PUSHs(newSVpvs_flags("utf8", SVs_TEMP));
nitem++;
}
}
}
}
SvREFCNT_dec(av);
XSRETURN(nitem);
}
}
#endif
XSRETURN(0);
}
XS(XS_re_is_regexp); /* prototype to pass -Wmissing-prototypes */
XS(XS_re_is_regexp)
{
dXSARGS;
if (items != 1)
croak_xs_usage(cv, "sv");
if (SvRXOK(ST(0))) {
XSRETURN_YES;
} else {
XSRETURN_NO;
}
}
XS(XS_re_regnames_count); /* prototype to pass -Wmissing-prototypes */
XS(XS_re_regnames_count)
{
REGEXP *rx = PL_curpm ? PM_GETRE(PL_curpm) : NULL;
SV * ret;
dXSARGS;
if (items != 0)
croak_xs_usage(cv, "");
if (!rx)
XSRETURN_UNDEF;
ret = CALLREG_NAMED_BUFF_COUNT(rx);
SPAGAIN;
PUSHs(ret ? sv_2mortal(ret) : &PL_sv_undef);
XSRETURN(1);
}
XS(XS_re_regname); /* prototype to pass -Wmissing-prototypes */
XS(XS_re_regname)
{
dXSARGS;
REGEXP * rx;
U32 flags;
SV * ret;
if (items < 1 || items > 2)
croak_xs_usage(cv, "name[, all ]");
SP -= items;
PUTBACK;
rx = PL_curpm ? PM_GETRE(PL_curpm) : NULL;
if (!rx)
XSRETURN_UNDEF;
if (items == 2 && SvTRUE_NN(ST(1))) {
flags = RXapif_ALL;
} else {
flags = RXapif_ONE;
}
ret = CALLREG_NAMED_BUFF_FETCH(rx, ST(0), (flags | RXapif_REGNAME));
SPAGAIN;
PUSHs(ret ? sv_2mortal(ret) : &PL_sv_undef);
XSRETURN(1);
}
XS(XS_re_regnames); /* prototype to pass -Wmissing-prototypes */
XS(XS_re_regnames)
{
dXSARGS;
REGEXP * rx;
U32 flags;
SV *ret;
AV *av;
SSize_t length;
SSize_t i;
SV **entry;
if (items > 1)
croak_xs_usage(cv, "[all]");
rx = PL_curpm ? PM_GETRE(PL_curpm) : NULL;
if (!rx)
XSRETURN_UNDEF;
if (items == 1 && SvTRUE_NN(ST(0))) {
flags = RXapif_ALL;
} else {
flags = RXapif_ONE;
}
SP -= items;
PUTBACK;
ret = CALLREG_NAMED_BUFF_ALL(rx, (flags | RXapif_REGNAMES));
SPAGAIN;
if (!ret)
XSRETURN_UNDEF;
av = MUTABLE_AV(SvRV(ret));
length = av_count(av);
EXTEND(SP, length); /* better extend stack just once */
for (i = 0; i < length; i++) {
entry = av_fetch(av, i, FALSE);
if (!entry)
Perl_croak(aTHX_ "NULL array element in re::regnames()");
mPUSHs(SvREFCNT_inc_simple_NN(*entry));
}
SvREFCNT_dec(ret);
PUTBACK;
return;
}
XS(XS_re_regexp_pattern); /* prototype to pass -Wmissing-prototypes */
XS(XS_re_regexp_pattern)
{
dXSARGS;