static THROW_RO *throwRoGet( // GET THROW R/O BLOCK
TYPE type ) // - type being thrown
{
THROW_RO *srch; // - search R/O block for symbol
THROW_RO *ro; // - R/O block for symbol
SYMBOL sym; // - symbol for throw object
THROW_CNV_CTL ctl; // - control area
target_offset_t offset; // - offset ( not used )
type = TypeCanonicalThr( type );
ro = NULL;
RingIterBeg( ring_throw_ro, srch ) {
if( TypesIdentical( srch->sig->type, type ) ) {
ro = srch;
break;
}
} RingIterEnd( srch );
if( ro == NULL ) {
ro = RingCarveAlloc( carveTHROW_RO, &ring_throw_ro );
ro->sig = BeTypeSignature( type );
ro->emitted = false;
sym = CgVarRo( CgbkInfo.size_offset + sizeOfThrowCnv() * ThrowCnvInit( &ctl, type ),
SC_PUBLIC, CppNameThrowRo( type ) );
ro->sym = sym;
for( ; ; ) {
type = ThrowCnvType( &ctl, &offset );
if( type == NULL )
break;
BeTypeSignature( type );
}
ThrowCnvFini( &ctl );
}
return( ro );
}
unsigned ThrowCnvInit( // THROW CONVERSIONS: INITIALIZE
THROW_CNV_CTL *ctl, // - control area
TYPE type ) // - type thrown
{
type_flag not_used; // - not used
THROBJ thr_obj; // - type of throw object
ctl->carver = CarveCreate( sizeof( THROW_CNV ), 8 );
ctl->hdr = NULL;
ctl->cur = NULL;
type = TypeCanonicalThr( type );
ctl->error_occurred = false;
thr_obj = ThrowCategory( type );
if( thr_obj == THROBJ_REFERENCE ) {
makeThrowCnvNoAcc( ctl, type, 0 );
} else {
makeThrowCnv( ctl, type, 0 );
}
switch( thr_obj ) {
case THROBJ_VOID_STAR :
case THROBJ_ANYTHING :
case THROBJ_SCALAR :
break;
case THROBJ_PTR_SCALAR :
makeCnvVoidStar( ctl );
break;
case THROBJ_REFERENCE :
type = TypeReference( type );
if( NULL != StructType( type ) ) {
throwClassCnvs( type, ctl );
} else {
type = TypePointedAt( type, ¬_used );
if( type != NULL ) {
type = StructType( type );
if( type != NULL ) {
throwClassPtrCnvs( type, ctl );
}
makeCnvVoidStar( ctl );
}
}
break;
case THROBJ_CLASS :
case THROBJ_CLASS_VIRT :
throwClassCnvs( type, ctl );
break;
case THROBJ_PTR_CLASS :
throwClassPtrCnvs( type, ctl );
makeCnvVoidStar( ctl );
break;
case THROBJ_PTR_FUN :
if( CgCodePtrSize() <= CgDataPtrSize() ) {
makeCnvVoidStar( ctl );
}
break;
DbgDefault( "EXCEPT -- illegal throw object" );
}
return RingCount( ctl->hdr );
}
PTREE ThrowTypeSig( // GET THROW ARGUMENT FOR TYPE SIGNATURE
TYPE type, // - type to be thrown
PTREE expr ) // - expression for errors
{
PTREE node; // - node constructed
type = TypeCanonicalThr( type );
if( throwCnvFront( type, expr ) ) {
node = NodeUnary( CO_TYPE_SIG, NULL );
node->type = type;
node = NodeArg( node );
node->type = type;
} else {
node = NULL;
}
return node;
}
TYPE_SIG *TypeSigFind( // FIND TYPE SIGNATURE
TYPE_SIG_ACCESS acc, // - access type
TYPE type, // - type for signature
TOKEN_LOCN* err_locn, // - error location for access errors
bool *error_occurred ) // - to set error indication
{
TYPE_SIG *srch; // - signature for searching
TYPE_SIG *sig; // - signature
SYMBOL sym; // - symbol
unsigned size; // - size of R/O data
NAME typesig_name; // - name of type signature
TYPE typesig_type; // - type of type signature
bool err_this_time; // - true ==> we have error
TYPE_SIG_ACCESS acc_ind; // - indirect access
err_this_time = false;
type = TypeCanonicalThr( type );
sig = NULL;
RingIterBeg( type_sigs, srch ) {
if( TypesSameExclude( srch->type, type, TC1_NOT_ENUM_CHAR ) ) {
sig = srch;
break;
}
} RingIterEnd( srch );
if( sig == NULL ) {
THROBJ thr; // - category of object
DbgVerify( 0 == ( acc & TSA_GEN )
, "TypeSigFind -- no type signature & TSA_GEN" );
sig = RingCarveAlloc( carveTYPE_SIG, &type_sigs );
sig->type = type;
sig->default_ctor = NULL;
sig->copy_ctor = NULL;
sig->dtor = NULL;
sig->sym = NULL;
sig->base = NULL;
sig->cgref = false;
sig->cggen = false;
sig->free = false;
thr = ThrowCategory( type );
if( acc & TSA_INDIRECT ) {
acc_ind = acc | TSA_INDIRECT_ACCESS;
} else if( acc & TSA_INDIRECT_ACCESS ) {
acc_ind = ( acc & ~ TSA_INDIRECT ) | TSA_INDIRECT_GEN;
} else {
acc_ind = acc;
}
size = 0;
switch( thr ) {
case THROBJ_PTR_SCALAR :
case THROBJ_PTR_CLASS :
sig->base = TypeSigFind( acc_ind & TSA_INDIRECT
, TypePointedAtModified( type )
, err_locn
, &err_this_time );
size = typeSigHdrSize();
break;
case THROBJ_SCALAR :
case THROBJ_PTR_FUN :
case THROBJ_VOID_STAR :
size = typeSigHdrSize() + SizeTargetSizeT();
break;
case THROBJ_REFERENCE :
sig->base = TypeSigFind( acc_ind
, TypeReference( type )
, err_locn
, &err_this_time );
break;
case THROBJ_CLASS :
case THROBJ_CLASS_VIRT :
size = 3 * CgCodePtrSize() + CgDataPtrSize() + typeSigHdrSize();
break;
case THROBJ_ANYTHING :
break;
default :
DbgStmt( CFatal( "cgTypeSignature -- invalid throw category" ) );
}
size += typeSigNameSize( thr );
if( size == 0 ) {
sym = NULL;
} else { // - type for TYPE SIGNATURE variable
typesig_name = CppNameTypeSig( type );
sym = ScopeAlreadyExists( GetFileScope(), typesig_name );
if( sym == NULL ) {
typesig_type = MakeInternalType( size );
typesig_type = MakeCompilerConstCommonData( typesig_type );
sym = SymCreateFileScope( typesig_type
, SC_PUBLIC
, SF_REFERENCED | SF_ADDR_TAKEN
, typesig_name );
LinkageSet( sym, "C++" );
CgSegId( sym );
}
}
sig->sym = sym;
}
if( err_this_time ) {
*error_occurred = true;
} else {
if( NULL != sig->sym ) {
SegmentMarkUsed( sig->sym->segid );
}
*error_occurred = false;
typeSigAccess( acc, sig, err_locn, error_occurred );
}
return( sig );
}
