USER_OBJECT_
RS_PerlClear(USER_OBJECT_ obj)
{
SV *sv;
int n;
USER_OBJECT_ ans;
dTHX;
ans = NEW_LOGICAL(1);
sv = RS_PerlGetSV(obj);
if(sv == NULL)
return(ans);
switch(SvTYPE(sv)) {
case SVt_PVHV:
hv_clear((HV*) sv);
break;
case SVt_PVAV:
av_clear((AV*) sv);
break;
default:
n = 1;
break;
}
LOGICAL_DATA(ans)[0] = TRUE;
return(ans);
}
void
Perl_mro_set_mro(pTHX_ struct mro_meta *const meta, SV *const name)
{
const struct mro_alg *const which = Perl_mro_get_from_name(aTHX_ name);
PERL_ARGS_ASSERT_MRO_SET_MRO;
if (!which)
Perl_croak(aTHX_ "Invalid mro name: '%"SVf"'", name);
if(meta->mro_which != which) {
if (meta->mro_linear_c3 && !meta->mro_linear_dfs) {
/* If we were storing something directly, put it in the hash before
we lose it. */
Perl_mro_set_private_data(aTHX_ meta, meta->mro_which,
MUTABLE_SV(meta->mro_linear_c3));
}
meta->mro_which = which;
/* Scrub our cached pointer to the private data. */
meta->mro_linear_c3 = NULL;
/* Only affects local method cache, not
even child classes */
meta->cache_gen++;
if(meta->mro_nextmethod)
hv_clear(meta->mro_nextmethod);
}
}
/*
=for apidoc mro_method_changed_in
Invalidates method caching on any child classes
of the given stash, so that they might notice
the changes in this one.
Ideally, all instances of C<PL_sub_generation++> in
perl source outside of F<mro.c> should be
replaced by calls to this.
Perl automatically handles most of the common
ways a method might be redefined. However, there
are a few ways you could change a method in a stash
without the cache code noticing, in which case you
need to call this method afterwards:
1) Directly manipulating the stash HV entries from
XS code.
2) Assigning a reference to a readonly scalar
constant into a stash entry in order to create
a constant subroutine (like F<constant.pm>
does).
This same method is available from pure perl
via, C<mro::method_changed_in(classname)>.
=cut
*/
void
Perl_mro_method_changed_in(pTHX_ HV *stash)
{
const char * const stashname = HvENAME_get(stash);
const STRLEN stashname_len = HvENAMELEN_get(stash);
SV ** const svp = hv_fetchhek(PL_isarev, HvENAME_HEK(stash), 0);
HV * const isarev = svp ? MUTABLE_HV(*svp) : NULL;
PERL_ARGS_ASSERT_MRO_METHOD_CHANGED_IN;
if(!stashname)
Perl_croak(aTHX_ "Can't call mro_method_changed_in() on anonymous symbol table");
/* Inc the package generation, since a local method changed */
HvMROMETA(stash)->pkg_gen++;
/* DESTROY can be cached in SvSTASH. */
if (!SvOBJECT(stash)) SvSTASH(stash) = NULL;
/* If stash is UNIVERSAL, or one of UNIVERSAL's parents,
invalidate all method caches globally */
if((stashname_len == 9 && strEQ(stashname, "UNIVERSAL"))
|| (isarev && hv_exists(isarev, "UNIVERSAL", 9))) {
PL_sub_generation++;
return;
}
/* else, invalidate the method caches of all child classes,
but not itself */
if(isarev) {
HE* iter;
hv_iterinit(isarev);
while((iter = hv_iternext(isarev))) {
HV* const revstash = gv_stashsv(hv_iterkeysv(iter), 0);
struct mro_meta* mrometa;
if(!revstash) continue;
mrometa = HvMROMETA(revstash);
mrometa->cache_gen++;
if(mrometa->mro_nextmethod)
hv_clear(mrometa->mro_nextmethod);
if (!SvOBJECT(revstash)) SvSTASH(revstash) = NULL;
}
}
/* The method change may be due to *{$package . "::()"} = \&nil; in
overload.pm. */
HvAMAGIC_on(stash);
/* pessimise derefs for now. Will get recalculated by Gv_AMupdate() */
HvAUX(stash)->xhv_aux_flags &= ~HvAUXf_NO_DEREF;
}
/*
=for apidoc mro_method_changed_in
Invalidates method caching on any child classes
of the given stash, so that they might notice
the changes in this one.
Ideally, all instances of C<PL_sub_generation++> in
perl source outside of C<mro.c> should be
replaced by calls to this.
Perl automatically handles most of the common
ways a method might be redefined. However, there
are a few ways you could change a method in a stash
without the cache code noticing, in which case you
need to call this method afterwards:
1) Directly manipulating the stash HV entries from
XS code.
2) Assigning a reference to a readonly scalar
constant into a stash entry in order to create
a constant subroutine (like constant.pm
does).
This same method is available from pure perl
via, C<mro::method_changed_in(classname)>.
=cut
*/
void
Perl_mro_method_changed_in(pTHX_ HV *stash)
{
const char * const stashname = HvNAME_get(stash);
const STRLEN stashname_len = HvNAMELEN_get(stash);
SV ** const svp = hv_fetch(PL_isarev, stashname, stashname_len, 0);
HV * const isarev = svp ? MUTABLE_HV(*svp) : NULL;
PERL_ARGS_ASSERT_MRO_METHOD_CHANGED_IN;
if(!stashname)
Perl_croak(aTHX_ "Can't call mro_method_changed_in() on anonymous symbol table");
/* Inc the package generation, since a local method changed */
HvMROMETA(stash)->pkg_gen++;
/* If stash is UNIVERSAL, or one of UNIVERSAL's parents,
invalidate all method caches globally */
if((stashname_len == 9 && strEQ(stashname, "UNIVERSAL"))
|| (isarev && hv_exists(isarev, "UNIVERSAL", 9))) {
PL_sub_generation++;
return;
}
/* else, invalidate the method caches of all child classes,
but not itself */
if(isarev) {
HE* iter;
hv_iterinit(isarev);
while((iter = hv_iternext(isarev))) {
I32 len;
const char* const revkey = hv_iterkey(iter, &len);
HV* const revstash = gv_stashpvn(revkey, len, 0);
struct mro_meta* mrometa;
if(!revstash) continue;
mrometa = HvMROMETA(revstash);
mrometa->cache_gen++;
if(mrometa->mro_nextmethod)
hv_clear(mrometa->mro_nextmethod);
}
}
}
/*
* This is the main Load function.
* It takes a yaml stream and turns it into 0 or more Perl objects.
*/
void
Load(SV *yaml_sv)
{
dXSARGS;
perl_yaml_loader_t loader;
SV *node;
char *yaml_str;
STRLEN yaml_len;
/* If UTF8, make copy and downgrade */
if (SvPV_nolen(yaml_sv) && SvUTF8(yaml_sv)) {
yaml_sv = sv_mortalcopy(yaml_sv);
}
yaml_str = SvPVbyte(yaml_sv, yaml_len);
sp = mark;
if (0 && (items || ax)) {} /* XXX Quiet the -Wall warnings for now. */
yaml_parser_initialize(&loader.parser);
loader.document = 0;
yaml_parser_set_input_string(
&loader.parser,
(unsigned char *)yaml_str,
yaml_len
);
/* Get the first event. Must be a STREAM_START */
if (!yaml_parser_parse(&loader.parser, &loader.event))
goto load_error;
if (loader.event.type != YAML_STREAM_START_EVENT)
croak(ERRMSG "Expected STREAM_START_EVENT; Got: %d != %d",
loader.event.type,
YAML_STREAM_START_EVENT
);
loader.anchors = newHV();
sv_2mortal((SV*)loader.anchors);
/* Keep calling load_node until end of stream */
while (1) {
loader.document++;
if (!yaml_parser_parse(&loader.parser, &loader.event))
goto load_error;
if (loader.event.type == YAML_STREAM_END_EVENT)
break;
node = load_node(&loader);
hv_clear(loader.anchors);
if (! node) break;
XPUSHs(sv_2mortal(node));
if (!yaml_parser_parse(&loader.parser, &loader.event))
goto load_error;
if (loader.event.type != YAML_DOCUMENT_END_EVENT)
croak(ERRMSG "Expected DOCUMENT_END_EVENT");
}
/* Make sure the last event is a STREAM_END */
if (loader.event.type != YAML_STREAM_END_EVENT)
croak(ERRMSG "Expected STREAM_END_EVENT; Got: %d != %d",
loader.event.type,
YAML_STREAM_END_EVENT
);
yaml_parser_delete(&loader.parser);
PUTBACK;
return;
load_error:
croak(loader_error_msg(&loader, NULL));
}
/*
=for apidoc mro_isa_changed_in
Takes the necessary steps (cache invalidations, mostly)
when the @ISA of the given package has changed. Invoked
by the C<setisa> magic, should not need to invoke directly.
=cut
*/
void
Perl_mro_isa_changed_in(pTHX_ HV* stash)
{
dVAR;
HV* isarev;
AV* linear_mro;
HE* iter;
SV** svp;
I32 items;
bool is_universal;
struct mro_meta * meta;
const char * const stashname = HvNAME_get(stash);
const STRLEN stashname_len = HvNAMELEN_get(stash);
PERL_ARGS_ASSERT_MRO_ISA_CHANGED_IN;
if(!stashname)
Perl_croak(aTHX_ "Can't call mro_isa_changed_in() on anonymous symbol table");
/* wipe out the cached linearizations for this stash */
meta = HvMROMETA(stash);
if (meta->mro_linear_dfs) {
SvREFCNT_dec(MUTABLE_SV(meta->mro_linear_dfs));
meta->mro_linear_dfs = NULL;
/* This is just acting as a shortcut pointer. */
meta->mro_linear_c3 = NULL;
} else if (meta->mro_linear_c3) {
/* Only the current MRO is stored, so this owns the data. */
SvREFCNT_dec(MUTABLE_SV(meta->mro_linear_c3));
meta->mro_linear_c3 = NULL;
}
if (meta->isa) {
SvREFCNT_dec(meta->isa);
meta->isa = NULL;
}
/* Inc the package generation, since our @ISA changed */
meta->pkg_gen++;
/* Wipe the global method cache if this package
is UNIVERSAL or one of its parents */
svp = hv_fetch(PL_isarev, stashname, stashname_len, 0);
isarev = svp ? MUTABLE_HV(*svp) : NULL;
if((stashname_len == 9 && strEQ(stashname, "UNIVERSAL"))
|| (isarev && hv_exists(isarev, "UNIVERSAL", 9))) {
PL_sub_generation++;
is_universal = TRUE;
}
else { /* Wipe the local method cache otherwise */
meta->cache_gen++;
is_universal = FALSE;
}
/* wipe next::method cache too */
if(meta->mro_nextmethod) hv_clear(meta->mro_nextmethod);
/* Iterate the isarev (classes that are our children),
wiping out their linearization, method and isa caches */
if(isarev) {
hv_iterinit(isarev);
while((iter = hv_iternext(isarev))) {
I32 len;
const char* const revkey = hv_iterkey(iter, &len);
HV* revstash = gv_stashpvn(revkey, len, 0);
struct mro_meta* revmeta;
if(!revstash) continue;
revmeta = HvMROMETA(revstash);
if (revmeta->mro_linear_dfs) {
SvREFCNT_dec(MUTABLE_SV(revmeta->mro_linear_dfs));
revmeta->mro_linear_dfs = NULL;
/* This is just acting as a shortcut pointer. */
revmeta->mro_linear_c3 = NULL;
} else if (revmeta->mro_linear_c3) {
/* Only the current MRO is stored, so this owns the data. */
SvREFCNT_dec(MUTABLE_SV(revmeta->mro_linear_c3));
revmeta->mro_linear_c3 = NULL;
}
if(!is_universal)
revmeta->cache_gen++;
if(revmeta->mro_nextmethod)
hv_clear(revmeta->mro_nextmethod);
if (revmeta->isa) {
SvREFCNT_dec(revmeta->isa);
revmeta->isa = NULL;
}
}
}
/* Now iterate our MRO (parents), and do a few things:
1) instantiate with the "fake" flag if they don't exist
2) flag them as universal if we are universal
3) Add everything from our isarev to their isarev
*/
/* We're starting at the 2nd element, skipping ourselves here */
linear_mro = mro_get_linear_isa(stash);
svp = AvARRAY(linear_mro) + 1;
items = AvFILLp(linear_mro);
while (items--) {
SV* const sv = *svp++;
HV* mroisarev;
HE *he = hv_fetch_ent(PL_isarev, sv, TRUE, 0);
/* That fetch should not fail. But if it had to create a new SV for
us, then we can detect it, because it will not be the correct type.
Probably faster and cleaner for us to free that scalar [very little
code actually executed to free it] and create a new HV than to
copy&paste [SIN!] the code from newHV() to allow us to upgrade the
new SV from SVt_NULL. */
mroisarev = MUTABLE_HV(HeVAL(he));
if(SvTYPE(mroisarev) != SVt_PVHV) {
SvREFCNT_dec(mroisarev);
mroisarev = newHV();
HeVAL(he) = MUTABLE_SV(mroisarev);
}
/* This hash only ever contains PL_sv_yes. Storing it over itself is
almost as cheap as calling hv_exists, so on aggregate we expect to
save time by not making two calls to the common HV code for the
case where it doesn't exist. */
(void)hv_store(mroisarev, stashname, stashname_len, &PL_sv_yes, 0);
if(isarev) {
hv_iterinit(isarev);
while((iter = hv_iternext(isarev))) {
I32 revkeylen;
char* const revkey = hv_iterkey(iter, &revkeylen);
(void)hv_store(mroisarev, revkey, revkeylen, &PL_sv_yes, 0);
}
}
}
}
void
Perl_mro_isa_changed_in(pTHX_ HV* stash)
{
HV* isarev;
AV* linear_mro;
HE* iter;
SV** svp;
I32 items;
bool is_universal;
struct mro_meta * meta;
HV *isa = NULL;
const HEK * const stashhek = HvENAME_HEK(stash);
const char * const stashname = HvENAME_get(stash);
const STRLEN stashname_len = HvENAMELEN_get(stash);
PERL_ARGS_ASSERT_MRO_ISA_CHANGED_IN;
if(!stashname)
Perl_croak(aTHX_ "Can't call mro_isa_changed_in() on anonymous symbol table");
/* wipe out the cached linearizations for this stash */
meta = HvMROMETA(stash);
CLEAR_LINEAR(meta);
if (meta->isa) {
/* Steal it for our own purposes. */
isa = (HV *)sv_2mortal((SV *)meta->isa);
meta->isa = NULL;
}
/* Inc the package generation, since our @ISA changed */
meta->pkg_gen++;
/* Wipe the global method cache if this package
is UNIVERSAL or one of its parents */
svp = hv_fetchhek(PL_isarev, stashhek, 0);
isarev = svp ? MUTABLE_HV(*svp) : NULL;
if((stashname_len == 9 && strEQ(stashname, "UNIVERSAL"))
|| (isarev && hv_exists(isarev, "UNIVERSAL", 9))) {
PL_sub_generation++;
is_universal = TRUE;
}
else { /* Wipe the local method cache otherwise */
meta->cache_gen++;
is_universal = FALSE;
}
/* wipe next::method cache too */
if(meta->mro_nextmethod) hv_clear(meta->mro_nextmethod);
/* Changes to @ISA might turn overloading on */
HvAMAGIC_on(stash);
/* pessimise derefs for now. Will get recalculated by Gv_AMupdate() */
HvAUX(stash)->xhv_aux_flags &= ~HvAUXf_NO_DEREF;
/* DESTROY can be cached in SvSTASH. */
if (!SvOBJECT(stash)) SvSTASH(stash) = NULL;
/* Iterate the isarev (classes that are our children),
wiping out their linearization, method and isa caches
and upating PL_isarev. */
if(isarev) {
HV *isa_hashes = NULL;
/* We have to iterate through isarev twice to avoid a chicken and
* egg problem: if A inherits from B and both are in isarev, A might
* be processed before B and use B's previous linearisation.
*/
/* First iteration: Wipe everything, but stash away the isa hashes
* since we still need them for updating PL_isarev.
*/
if(hv_iterinit(isarev)) {
/* Only create the hash if we need it; i.e., if isarev has
any elements. */
isa_hashes = (HV *)sv_2mortal((SV *)newHV());
}
while((iter = hv_iternext(isarev))) {
HV* revstash = gv_stashsv(hv_iterkeysv(iter), 0);
struct mro_meta* revmeta;
if(!revstash) continue;
revmeta = HvMROMETA(revstash);
CLEAR_LINEAR(revmeta);
if(!is_universal)
revmeta->cache_gen++;
if(revmeta->mro_nextmethod)
hv_clear(revmeta->mro_nextmethod);
if (!SvOBJECT(revstash)) SvSTASH(revstash) = NULL;
(void)
hv_store(
isa_hashes, (const char*)&revstash, sizeof(HV *),
revmeta->isa ? (SV *)revmeta->isa : &PL_sv_undef, 0
);
revmeta->isa = NULL;
}
/* Second pass: Update PL_isarev. We can just use isa_hashes to
* avoid another round of stash lookups. */
/* isarev might be deleted from PL_isarev during this loop, so hang
* on to it. */
SvREFCNT_inc_simple_void_NN(sv_2mortal((SV *)isarev));
if(isa_hashes) {
hv_iterinit(isa_hashes);
while((iter = hv_iternext(isa_hashes))) {
HV* const revstash = *(HV **)HEK_KEY(HeKEY_hek(iter));
HV * const isa = (HV *)HeVAL(iter);
const HEK *namehek;
/* We're starting at the 2nd element, skipping revstash */
linear_mro = mro_get_linear_isa(revstash);
svp = AvARRAY(linear_mro) + 1;
items = AvFILLp(linear_mro);
namehek = HvENAME_HEK(revstash);
if (!namehek) namehek = HvNAME_HEK(revstash);
while (items--) {
SV* const sv = *svp++;
HV* mroisarev;
HE *he = hv_fetch_ent(PL_isarev, sv, TRUE, 0);
/* That fetch should not fail. But if it had to create
a new SV for us, then will need to upgrade it to an
HV (which sv_upgrade() can now do for us). */
mroisarev = MUTABLE_HV(HeVAL(he));
SvUPGRADE(MUTABLE_SV(mroisarev), SVt_PVHV);
/* This hash only ever contains PL_sv_yes. Storing it
over itself is almost as cheap as calling hv_exists,
so on aggregate we expect to save time by not making
two calls to the common HV code for the case where
it doesn't exist. */
(void)
hv_storehek(mroisarev, namehek, &PL_sv_yes);
}
if ((SV *)isa != &PL_sv_undef) {
assert(namehek);
mro_clean_isarev(
isa, HEK_KEY(namehek), HEK_LEN(namehek),
HvMROMETA(revstash)->isa, HEK_HASH(namehek),
HEK_UTF8(namehek)
);
}
}
}
}
/* Now iterate our MRO (parents), adding ourselves and everything from
our isarev to their isarev.
*/
/* We're starting at the 2nd element, skipping ourselves here */
linear_mro = mro_get_linear_isa(stash);
svp = AvARRAY(linear_mro) + 1;
items = AvFILLp(linear_mro);
while (items--) {
SV* const sv = *svp++;
HV* mroisarev;
HE *he = hv_fetch_ent(PL_isarev, sv, TRUE, 0);
/* That fetch should not fail. But if it had to create a new SV for
us, then will need to upgrade it to an HV (which sv_upgrade() can
now do for us. */
mroisarev = MUTABLE_HV(HeVAL(he));
SvUPGRADE(MUTABLE_SV(mroisarev), SVt_PVHV);
/* This hash only ever contains PL_sv_yes. Storing it over itself is
almost as cheap as calling hv_exists, so on aggregate we expect to
save time by not making two calls to the common HV code for the
case where it doesn't exist. */
(void)hv_storehek(mroisarev, stashhek, &PL_sv_yes);
}
/* Delete our name from our former parents' isarevs. */
if(isa && HvARRAY(isa))
mro_clean_isarev(isa, stashname, stashname_len, meta->isa,
HEK_HASH(stashhek), HEK_UTF8(stashhek));
}
void
Application_init( Handle self, HV * profile)
{
dPROFILE;
int hintPause = pget_i( hintPause);
Color hintColor = pget_i( hintColor), hintBackColor = pget_i( hintBackColor);
SV * hintFont = pget_sv( hintFont);
SV * sv;
char * hintClass = pget_c( hintClass);
if ( application != nilHandle)
croak( "Attempt to create more than one application instance");
CDrawable-> init( self, profile);
list_create( &var-> widgets, 16, 16);
list_create( &var-> modalHorizons, 0, 8);
application = self;
if ( !apc_application_create( self))
croak( "Error creating application");
/* Widget init */
SvHV_Font( pget_sv( font), &Font_buffer, "Application::init");
my-> set_font( self, Font_buffer);
SvHV_Font( pget_sv( popupFont), &Font_buffer, "Application::init");
my-> set_popup_font( self, Font_buffer);
{
AV * av = ( AV *) SvRV( pget_sv( designScale));
SV ** holder = av_fetch( av, 0, 0);
if ( holder)
var-> designScale. x = SvNV( *holder);
else
warn("Array panic on 'designScale'");
holder = av_fetch( av, 1, 0);
if ( holder)
var-> designScale. y = SvNV( *holder);
else
warn("Array panic on 'designScale'");
pdelete( designScale);
}
var-> text = duplicate_string("");
opt_set( optModalHorizon);
/* store extra info */
{
HV * hv = ( HV *) SvRV( var-> mate);
(void) hv_store( hv, "PrinterClass", 12, newSVpv( pget_c( printerClass), 0), 0);
(void) hv_store( hv, "PrinterModule", 13, newSVpv( pget_c( printerModule), 0), 0);
(void) hv_store( hv, "HelpClass", 9, newSVpv( pget_c( helpClass), 0), 0);
(void) hv_store( hv, "HelpModule", 10, newSVpv( pget_c( helpModule), 0), 0);
}
{
HV * profile = newHV();
static Timer_vmt HintTimerVmt;
pset_H( owner, self);
pset_i( timeout, hintPause);
pset_c( name, "HintTimer");
var-> hintTimer = create_instance( "Prima::Timer");
protect_object( var-> hintTimer);
hv_clear( profile);
memcpy( &HintTimerVmt, CTimer, sizeof( HintTimerVmt));
HintTimerVmt. handle_event = Application_HintTimer_handle_event;
(( PTimer) var-> hintTimer)-> self = &HintTimerVmt;
pset_H( owner, self);
pset_i( color, hintColor);
pset_i( backColor, hintBackColor);
pset_i( visible, 0);
pset_i( selectable, 0);
pset_i( showHint, 0);
pset_c( name, "HintWidget");
pset_sv( font, hintFont);
var-> hintWidget = create_instance( hintClass);
protect_object( var-> hintWidget);
sv_free(( SV *) profile);
}
if ( SvTYPE( sv = pget_sv( accelItems)) != SVt_NULL)
my-> set_accelItems( self, sv);
if ( SvTYPE( sv = pget_sv( popupItems)) != SVt_NULL)
my-> set_popupItems( self, sv);
pdelete( accelTable);
pdelete( accelItems);
pdelete( popupItems);
my-> set( self, profile);
CORE_INIT_TRANSIENT(Application);
}
/*
* This is the main Load function.
* It takes a yaml stream and turns it into 0 or more Perl objects.
*/
void
Load(SV *yaml_sv)
{
dXSARGS;
perl_yaml_loader_t loader;
SV *node;
const unsigned char *yaml_str;
STRLEN yaml_len;
yaml_str = (const unsigned char *)SvPV_const(yaml_sv, yaml_len);
if (DO_UTF8(yaml_sv)) {
yaml_sv = sv_mortalcopy(yaml_sv);
if (!sv_utf8_downgrade(yaml_sv, TRUE))
croak("%s", "Wide character in YAML::XS::Load()");
yaml_str = (const unsigned char *)SvPV_const(yaml_sv, yaml_len);
}
sp = mark;
if (0 && (items || ax)) {} /* XXX Quiet the -Wall warnings for now. */
yaml_parser_initialize(&loader.parser);
loader.document = 0;
yaml_parser_set_input_string(
&loader.parser,
yaml_str,
yaml_len
);
/* Get the first event. Must be a STREAM_START */
if (!yaml_parser_parse(&loader.parser, &loader.event))
goto load_error;
if (loader.event.type != YAML_STREAM_START_EVENT)
croak("%sExpected STREAM_START_EVENT; Got: %d != %d",
ERRMSG,
loader.event.type,
YAML_STREAM_START_EVENT
);
loader.anchors = newHV();
sv_2mortal((SV *)loader.anchors);
/* Keep calling load_node until end of stream */
while (1) {
loader.document++;
/* We are through with the previous event - delete it! */
yaml_event_delete(&loader.event);
if (!yaml_parser_parse(&loader.parser, &loader.event))
goto load_error;
if (loader.event.type == YAML_STREAM_END_EVENT)
break;
node = load_node(&loader);
/* We are through with the previous event - delete it! */
yaml_event_delete(&loader.event);
hv_clear(loader.anchors);
if (! node) break;
XPUSHs(sv_2mortal(node));
if (!yaml_parser_parse(&loader.parser, &loader.event))
goto load_error;
if (loader.event.type != YAML_DOCUMENT_END_EVENT)
croak("%sExpected DOCUMENT_END_EVENT", ERRMSG);
}
/* Make sure the last event is a STREAM_END */
if (loader.event.type != YAML_STREAM_END_EVENT)
croak("%sExpected STREAM_END_EVENT; Got: %d != %d",
ERRMSG,
loader.event.type,
YAML_STREAM_END_EVENT
);
yaml_parser_delete(&loader.parser);
PUTBACK;
return;
load_error:
croak("%s", loader_error_msg(&loader, NULL));
}
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"));
}