750 lines
18 KiB
C++
750 lines
18 KiB
C++
/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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Copyright (c) 1989-1999 Microsoft Corporation
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Module Name:
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stcls.cxx
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Abstract:
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Implementation of offline methods for the structure code generation
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classes.
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Notes:
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History:
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Oct-1993 DKays Created.
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----------------------------------------------------------------------------*/
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#include "becls.hxx"
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#pragma hdrstop
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CG_ARRAY *
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CG_CONFORMANT_STRUCT::GetConformantArray()
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/*++
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Routine Description :
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Gets the conformant (varying/string) class pointer for a conformant
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structure.
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Arguments :
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None.
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--*/
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{
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CG_NDR * pConf;
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if ( ! pConfFld )
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return 0;
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pConf = (CG_NDR *) pConfFld->GetChild();
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for (;;)
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{
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if ( pConf->GetCGID() == ID_CG_CONF_ARRAY ||
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pConf->GetCGID() == ID_CG_CONF_VAR_ARRAY ||
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pConf->GetCGID() == ID_CG_CONF_STRING_ARRAY )
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break;
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if ( pConf->IsXmitRepOrUserMarshal() )
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{
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pConf = (CG_NDR *)pConf->GetChild();
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continue;
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}
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// else
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pConf = (CG_NDR *)
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((CG_CONFORMANT_STRUCT *)pConf)->GetConformantField();
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pConf = (CG_NDR *) pConf->GetChild();
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}
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return (CG_ARRAY *) pConf;
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}
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BOOL
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CG_COMPLEX_STRUCT::WarnAboutEmbeddedComplexStruct()
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/*
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The only reason we have this method is to help with an engine bug.
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The bug is that for complex structs (FC_BOGUS_STRUCT code) that have an
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embedded conformant struct, the engine marshals incorrect wire format.
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Hence this method checks if the complex struct has an open array at the end,
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and if so, checks if the last member is another type of struct.
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*/
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{
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BOOL HasIt = FALSE;
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if ( GetConformantArray() )
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{
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//
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// Get the last field.
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//
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CG_ITERATOR Iterator;
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CG_FIELD * pField;
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CG_NDR * pNdr;
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GetMembers( Iterator );
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while ( ITERATOR_GETNEXT( Iterator, pField ) )
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;
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pNdr = (CG_NDR *) pField->GetChild();
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if ( pNdr->IsStruct() )
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{
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HasIt = TRUE;
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char * pSymName, * pEmbeddedName, * pNameContext;
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pSymName = GetSymName() ? GetSymName() : "?";
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pEmbeddedName = pNdr->GetSymName() ? pNdr->GetSymName() : "?";
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size_t len = strlen( pSymName ) + strlen( pEmbeddedName ) + 20;
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pNameContext = new char[ len ];
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strcpy( pNameContext, pSymName );
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strcat( pNameContext, " embedding " );
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strcat( pNameContext, pEmbeddedName );
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if ( !pCommand->Is64BitEnv() )
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RpcError(NULL, 0, EMBEDDED_OPEN_STRUCT, pNameContext );
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}
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}
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return HasIt;
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}
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CG_FIELD *
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CG_STRUCT::GetFinalField()
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{
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CG_ITERATOR Iterator;
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CG_FIELD * pField;
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CG_NDR * pNdr;
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GetMembers( Iterator );
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//
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// Get the last field.
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//
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while ( ITERATOR_GETNEXT( Iterator, pField ) )
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;
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pNdr = (CG_NDR *) pField->GetChild();
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if ( pNdr->IsStruct() )
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pField = ((CG_STRUCT *)pNdr)->GetFinalField();
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return pField;
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}
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CG_FIELD *
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CG_STRUCT::GetArrayField( CG_ARRAY * pArray )
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{
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CG_ITERATOR Iterator;
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CG_FIELD * pField;
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CG_NDR * pNdr;
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GetMembers( Iterator );
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while ( ITERATOR_GETNEXT( Iterator, pField ) )
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{
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pNdr = (CG_NDR *) pField->GetChild();
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if ( pNdr == pArray )
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return pField;
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//
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// Search inside of other structs only.
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//
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if ( pNdr->IsStruct() )
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{
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if ( (pField = ((CG_STRUCT *)pNdr)->GetArrayField(pArray)) != 0 )
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return pField;
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}
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}
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// Didn't find it.
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return 0;
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}
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BOOL
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CG_STRUCT::IsHardStruct()
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{
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// REVIEW: The previous comment implied that we we're going to do something
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// else "after the PPC update". Is this still relevant?
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// -- MikeW 16-Jul-99
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return FALSE;
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}
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BOOL
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CG_STRUCT::IsHardStructOld()
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{
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CG_ITERATOR Iterator;
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CG_FIELD * pField;
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CG_FIELD * pPrevField;
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//
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// Cannot have a conformant array of any kind.
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//
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if ( (GetCGID() == ID_CG_CONF_STRUCT) ||
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(GetCGID() == ID_CG_CONF_VAR_STRUCT) )
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return FALSE;
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//
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// Cannot have pointers.
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//
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if ( HasPointer() )
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return FALSE;
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//
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// Can't have more than one enum16.
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//
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if ( GetNumberOfEnum16s() > 1 )
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return FALSE;
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//
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// Can't have padding in the middle of the struct that differs in
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// memory and on the wire.
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//
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GetMembers( Iterator );
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pPrevField = 0;
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//
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// Get the last field.
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//
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while ( ITERATOR_GETNEXT( Iterator, pField ) )
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{
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if ( pField->GetSibling() )
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pPrevField = pField;
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}
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//
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// Check if the last field in the struct has a different memory and wire
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// offset. However, if there is a single union as the last field then
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// we have to check the second to last fields's mem and wire offsets
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// instead since a union's field's wire offsets are not accurate.
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//
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if ( pField->GetChild()->IsUnion() && pPrevField )
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pField = pPrevField;
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// This is complex.
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if ( pField->GetMemOffset() != pField->GetWireOffset() )
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return FALSE;
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//
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// Can have at most one union as the last field only.
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//
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switch ( GetNumberOfUnions() )
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{
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case 0 :
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break;
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case 1 :
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//
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// The last field must be the union.
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//
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if ( ! GetFinalField()->GetChild()->IsUnion() )
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return FALSE;
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else
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return TRUE;
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break;
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default :
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return FALSE;
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}
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//
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// Now check again if we have just one enum16.
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//
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if ( GetNumberOfEnum16s() == 1 )
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return TRUE;
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//
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// Check for end padding, which is ok for a hard struct.
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//
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if ( GetMemorySize() > GetWireSize() )
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return TRUE;
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//
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// It must be a nice struct.
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//
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return FALSE;
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}
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BOOL
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CG_STRUCT::HasAFixedBufferSize()
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{
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CG_ITERATOR Iterator;
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CG_FIELD * pField;
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GetMembers( Iterator );
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while ( ITERATOR_GETNEXT( Iterator, pField ) )
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{
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if ( !pField->HasAFixedBufferSize() )
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return FALSE;
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}
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return TRUE;
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}
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BOOL
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CG_STRUCT::IsComplexStruct()
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{
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CG_ITERATOR Iterator;
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CG_FIELD * pField;
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CG_NDR * pNdr;
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BOOL IsConformant;
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IsConformant = (GetCGID() == ID_CG_CONF_STRUCT) ||
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(GetCGID() == ID_CG_CONF_VAR_STRUCT);
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switch ( GetNumberOfEnum16s() )
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{
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case 0 :
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break;
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case 1 :
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if ( HasPointer() || IsConformant )
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return TRUE;
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break;
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default :
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return TRUE;
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}
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switch ( GetNumberOfUnions() )
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{
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case 0 :
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break;
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case 1 :
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if ( ! GetFinalField()->GetChild()->IsUnion() ||
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HasPointer() ||
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IsConformant )
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return TRUE;
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break;
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default :
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return TRUE;
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}
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if ( (GetMemorySize() > GetWireSize()) && (HasPointer() || IsConformant) )
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return TRUE;
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GetMembers( Iterator );
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//
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// Check if there are any embedded structs or arrays which are
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// complex.
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// On 64b platforms any pointer makes it complex as well.
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//
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while ( ITERATOR_GETNEXT( Iterator, pField ) )
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{
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pNdr = (CG_NDR *) pField->GetChild();
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if ( pNdr->IsArray() && ((CG_ARRAY *)pNdr)->IsComplex() )
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return TRUE;
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if ( pNdr->IsStruct() && ((CG_STRUCT *)pNdr)->IsComplexStruct() )
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return TRUE;
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// struct fields with [range] on them make the struct complex.
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if ( pNdr->GetRangeAttribute() )
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return TRUE;
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//if ( pNdr->IsPointer() && pCommand->Is64BitEnv() )
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// return TRUE;
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if ( ( pField->GetWireOffset() != pField->GetMemOffset() ) ||
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( pField->GetWireSize() != pField->GetMemorySize() ) )
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return TRUE;
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}
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return IsHardStructOld();
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}
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bool
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CG_STRUCT::IsHomogeneous(FORMAT_CHARACTER format)
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{
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CG_ITERATOR Iterator;
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CG_FIELD *pField;
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GetMembers( Iterator );
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while ( ITERATOR_GETNEXT( Iterator, pField ))
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{
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CG_NDR *pChild = (CG_NDR *) pField->GetChild();
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if ( !pChild->IsHomogeneous( format ) )
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return false;
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}
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return true;
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}
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long
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CG_STRUCT::GetNumberOfPointers()
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{
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CG_ITERATOR Iterator;
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CG_FIELD * pField;
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CG_NDR * pMember;
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long Count;
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Count = 0;
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GetMembers(Iterator);
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while ( ITERATOR_GETNEXT( Iterator, pField ) )
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{
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pMember = (CG_NDR *) pField->GetChild();
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if ( pMember->IsPointer() &&
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!pMember->IsInterfacePointer() )
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Count++;
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if ( pMember->IsStruct() )
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Count += ((CG_STRUCT *)pMember)->GetNumberOfPointers();
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}
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return Count;
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}
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long
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CG_STRUCT::GetNumberOfEnum16s()
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{
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CG_ITERATOR Iterator;
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CG_FIELD * pField;
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CG_NDR * pNdr;
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long Count;
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long Weight;
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Count = 0;
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GetMembers(Iterator);
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while ( ITERATOR_GETNEXT( Iterator, pField ) )
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{
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pNdr = (CG_NDR *) pField->GetChild();
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//
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// If an array contains a enum16 we count it as 100 enum16s, since
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// this routine is only interested in small enum16 counts.
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//
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if ( pNdr->IsArray() )
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{
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pNdr = (CG_NDR *) pNdr->GetChild();
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while ( pNdr->IsArray() )
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pNdr = (CG_NDR *) pNdr->GetChild();
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Weight = 100;
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}
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else
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Weight = 1;
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if ( pNdr->IsSimpleType() &&
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(((CG_BASETYPE *)pNdr)->GetFormatChar() == FC_ENUM16) )
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Count += Weight;
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if ( pNdr->IsStruct() )
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Count += Weight * ((CG_STRUCT *)pNdr)->GetNumberOfEnum16s();
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}
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return Count;
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}
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long
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CG_STRUCT::GetNumberOfUnions()
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{
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CG_ITERATOR Iterator;
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CG_FIELD * pField;
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CG_NDR * pNdr;
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long Count;
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long Weight;
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Count = 0;
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GetMembers(Iterator);
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while ( ITERATOR_GETNEXT( Iterator, pField ) )
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{
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pNdr = (CG_NDR *) pField->GetChild();
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//
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// If an array contains a union we count it as 100 unions, since
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// this routine is only interested in small union counts.
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//
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if ( pNdr->IsArray() )
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{
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pNdr = (CG_NDR *) pNdr->GetChild();
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while ( pNdr->IsArray() )
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pNdr = (CG_NDR *) pNdr->GetChild();
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Weight = 100;
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}
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else
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Weight = 1;
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if ( (pNdr->GetCGID() == ID_CG_UNION) ||
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(pNdr->GetCGID() == ID_CG_ENCAP_STRUCT) )
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Count += Weight;
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if ( pNdr->IsStruct() )
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Count += Weight * ((CG_STRUCT *)pNdr)->GetNumberOfUnions();
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}
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return Count;
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}
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long
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CG_STRUCT::GetEnum16Offset()
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{
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CG_ITERATOR Iterator;
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CG_FIELD * pField;
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CG_NDR * pNdr;
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MIDL_ASSERT( GetNumberOfEnum16s() == 1 );
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GetMembers( Iterator );
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//
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// Search for the enum.
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//
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while ( ITERATOR_GETNEXT( Iterator, pField ) )
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{
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pNdr = (CG_NDR *) pField->GetChild();
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if ( pNdr->IsSimpleType() &&
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(((CG_BASETYPE *)pNdr)->GetFormatChar() == FC_ENUM16) )
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return pField->GetMemOffset();
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if ( pNdr->IsStruct() &&
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(((CG_STRUCT *)pNdr)->GetNumberOfEnum16s() == 1) )
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return pField->GetMemOffset() +
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((CG_STRUCT *)pNdr)->GetEnum16Offset();
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}
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// Never get here.
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return 0;
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}
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void
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CloneForUnrolling(
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CG_NDR * pParent,
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CG_NDR * pNdr )
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/*
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This routine will clone pNdr and overwrite the original child at
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the parent if needed.
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It is assumed the parent has been cloned, too.
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*/
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{
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CG_POINTER * pNewPointer;
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pNewPointer = 0;
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if ( pNdr->IsPointer() )
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{
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switch ( pNdr->GetCGID() )
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{
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case ID_CG_PTR :
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pNewPointer = new CG_POINTER(
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(CG_POINTER *) pNdr );
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break;
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case ID_CG_BC_PTR :
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pNewPointer = new CG_BYTE_COUNT_POINTER(
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(CG_BYTE_COUNT_POINTER *) pNdr );
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break;
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case ID_CG_STRING_PTR :
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case ID_CG_STRUCT_STRING_PTR :
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pNewPointer = new CG_STRING_POINTER(
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(CG_STRING_POINTER *) pNdr );
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break;
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case ID_CG_SIZE_PTR :
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pNewPointer = new CG_SIZE_POINTER(
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(CG_SIZE_POINTER *) pNdr );
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break;
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case ID_CG_LENGTH_PTR :
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pNewPointer = new CG_LENGTH_POINTER(
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(CG_LENGTH_POINTER *) pNdr );
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break;
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case ID_CG_SIZE_LENGTH_PTR :
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pNewPointer = new CG_SIZE_LENGTH_POINTER(
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(CG_SIZE_LENGTH_POINTER *) pNdr );
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break;
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case ID_CG_SIZE_STRING_PTR :
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pNewPointer = new CG_SIZE_STRING_POINTER(
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(CG_SIZE_STRING_POINTER *) pNdr );
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break;
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case ID_CG_INTERFACE_PTR :
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pNewPointer = new CG_INTERFACE_POINTER(
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(CG_INTERFACE_POINTER *) pNdr );
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break;
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case ID_CG_IIDIS_INTERFACE_PTR :
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pNewPointer = new CG_IIDIS_INTERFACE_POINTER(
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(CG_IIDIS_INTERFACE_POINTER *) pNdr );
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break;
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default :
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break;
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}
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if ( pNewPointer )
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{
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//
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// We have to re-set the new pointer's format string offset and
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// pointee format string offset to -1 so that we get a new
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// description!!!
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//
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if ( pNewPointer )
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pNewPointer->SetFormatStringOffset( -1 );
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pNewPointer->SetPointeeFormatStringOffset( -1 );
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pParent->SetChild( pNewPointer );
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if ( pNdr->GetChild() )
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CloneForUnrolling( pNewPointer, (CG_NDR*) pNdr->GetChild() );
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}
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}
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}
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void
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CG_STRUCT::Unroll()
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|
{
|
|
ITERATOR Iterator;
|
|
CG_FIELD * pPrevField;
|
|
CG_FIELD * pField;
|
|
CG_NDR * pNdr;
|
|
CG_STRUCT * pStruct;
|
|
|
|
GetMembers( Iterator );
|
|
|
|
pPrevField = 0;
|
|
|
|
while ( ITERATOR_GETNEXT(Iterator,pField) )
|
|
{
|
|
pNdr = (CG_NDR *) pField->GetChild();
|
|
|
|
if ( pNdr->IsStruct() && ((CG_STRUCT *)pNdr)->HasSizedPointer() )
|
|
pStruct = (CG_STRUCT *) pNdr;
|
|
else
|
|
{
|
|
pPrevField = pField;
|
|
continue;
|
|
}
|
|
|
|
//
|
|
// First force the embeded struct to unroll if needed.
|
|
//
|
|
pStruct->Unroll();
|
|
|
|
ITERATOR IteratorEmbeded;
|
|
CG_FIELD * pFieldNew;
|
|
CG_FIELD * pFieldEmbeded;
|
|
CG_FIELD * pFieldList;
|
|
long MemOffsetStart;
|
|
long WireOffsetStart;
|
|
|
|
pStruct->GetMembers( IteratorEmbeded );
|
|
|
|
MemOffsetStart = pField->GetMemOffset();
|
|
WireOffsetStart = pField->GetWireOffset();
|
|
|
|
// Get previous field node.
|
|
pFieldList = pPrevField;
|
|
|
|
// Remove current struct field node from the list.
|
|
if ( pFieldList )
|
|
pFieldList->SetSibling( pField->GetSibling() );
|
|
else
|
|
this->SetChild( pField->GetSibling() );
|
|
|
|
// To be safe.
|
|
pField->SetSibling( 0 );
|
|
|
|
while ( ITERATOR_GETNEXT(IteratorEmbeded,pFieldEmbeded) )
|
|
{
|
|
pFieldNew = (CG_FIELD *) pFieldEmbeded->Clone();
|
|
|
|
pNdr = (CG_NDR *) pFieldEmbeded->GetChild();
|
|
|
|
CloneForUnrolling( pFieldNew, pNdr );
|
|
|
|
//
|
|
// Set the new field's memory and wire offset.
|
|
//
|
|
pFieldNew->SetMemOffset( pFieldEmbeded->GetMemOffset() +
|
|
MemOffsetStart );
|
|
pFieldNew->SetWireOffset( pFieldEmbeded->GetWireOffset() +
|
|
WireOffsetStart );
|
|
|
|
//
|
|
// Now add the imbeded struct's field name to the PrintPrefix of
|
|
// the new unrolled field. We ask the imbeded struct's field
|
|
// for it's name.
|
|
//
|
|
pFieldNew->AddPrintPrefix( pField->GetType()->GetSymName() );
|
|
|
|
if ( pFieldList )
|
|
{
|
|
pFieldNew->SetSibling( pFieldList->GetSibling() );
|
|
pFieldList->SetSibling( pFieldNew );
|
|
}
|
|
else
|
|
{
|
|
pFieldNew->SetSibling( this->GetChild() );
|
|
this->SetChild( pFieldNew );
|
|
}
|
|
|
|
pFieldList = pFieldNew;
|
|
}
|
|
|
|
//
|
|
// Set pPrevField equal to the last field node that we entered into
|
|
// the list. The outermost Iterator only knows about fields that
|
|
// started in the struct's field list, so the last field node we
|
|
// added will have a sibling equal to the next field node we'll get
|
|
// from the outer iterator.
|
|
//
|
|
pPrevField = pFieldNew;
|
|
}
|
|
}
|
|
|
|
BOOL
|
|
CG_STRUCT::HasSizedPointer()
|
|
{
|
|
CG_ITERATOR Iterator;
|
|
CG_FIELD * pField;
|
|
CG_NDR * pNdr;
|
|
|
|
GetMembers( Iterator );
|
|
|
|
while ( ITERATOR_GETNEXT(Iterator,pField) )
|
|
{
|
|
pNdr = (CG_NDR *) pField->GetChild();
|
|
|
|
if ( pNdr->IsStruct() && ((CG_STRUCT *)pNdr)->HasSizedPointer() )
|
|
return TRUE;
|
|
|
|
if ( (pNdr->GetCGID() == ID_CG_SIZE_PTR) ||
|
|
(pNdr->GetCGID() == ID_CG_SIZE_LENGTH_PTR) ||
|
|
(pNdr->GetCGID() == ID_CG_SIZE_STRING_PTR) )
|
|
return TRUE;
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
BOOL
|
|
CG_ENCAPSULATED_STRUCT::ShouldFreeOffline()
|
|
{
|
|
CG_UNION * pUnion;
|
|
|
|
pUnion = (CG_UNION *) GetChild()->GetSibling()->GetChild();
|
|
|
|
return pUnion->HasPointer();
|
|
}
|
|
|