cfad47cfa3/tads3/vmpredef.h

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/* $Header: d:/cvsroot/tads/tads3/VMPREDEF.H,v 1.2 1999/05/17 02:52:28 MJRoberts Exp $ */



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/* 



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 *   Copyright (c) 1998, 2002 Michael J. Roberts.  All Rights Reserved.



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 *   



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 *   Please see the accompanying license file, LICENSE.TXT, for information



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 *   on using and copying this software.  



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 */



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/*



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Name



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  vmpredef.h - pre-defined objects and properties



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Function



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  Defines a global structure containing the pre-defined objects



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  and properties.  These values are provided by the load image file's



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  predefined value symbol table; at load time, we cache these values



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  for quick access.



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Notes



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Modified



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  12/09/98 MJRoberts  - Creation



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*/



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#ifndef VMPREDEF_H



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#define VMPREDEF_H



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#include "t3std.h"



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#include "vmtype.h"



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/*



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 *   some special import names - these are exports that we might need to



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 *   synthesize, so we need to know their names in the image loader code as



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 *   well as in the imports table 



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 */



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#define VM_IMPORT_NAME_LASTPROPOBJ   "*LastPropObj"



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#define VM_IMPORT_NAME_RTERRMSG      "exceptionMessage"



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#define VM_IMPORT_NAME_CONSTSTR      "*ConstStrObj"



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#define VM_IMPORT_NAME_CONSTLST      "*ConstLstObj"



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/*



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 *   pre-defined values 



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 */



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struct CVmPredef



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{



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    /* initialize */



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    CVmPredef()



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    {



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        /* 



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         *   the pre-defined variables are all undefined initially



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         */



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        reset();



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    }



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    /*



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     *   Reset the predef variables to their initial undefined values 



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     */



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    void reset()



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    {



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        /* 



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         *   include the import list to generate initializations for the



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         *   predef variables 



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         */



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#define VM_IMPORT_OBJ(sym, mem) mem = VM_INVALID_OBJ;



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#define VM_NOIMPORT_OBJ(sym, mem) VM_IMPORT_OBJ(sym, mem)



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#define VM_IMPORT_PROP(sym, mem) mem = VM_INVALID_PROP;



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#define VM_NOIMPORT_PROP(sym, mem) VM_IMPORT_PROP(sym, mem)



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#define VM_IMPORT_FUNC(sym, mem) mem = 0;



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#include "vmimport.h"



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    }



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    /*



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     *   Now include the import list to generate the actual member variables



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     *   for the imported symbols.  During image file load, the loader will



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     *   set these members to the actual values imported from the image



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     *   file.  



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     */



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#define VM_IMPORT_OBJ(sym, mem) vm_obj_id_t mem;



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#define VM_NOIMPORT_OBJ(sym, mem) VM_IMPORT_OBJ(sym, mem)



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#define VM_IMPORT_PROP(sym, mem) vm_prop_id_t mem;



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#define VM_NOIMPORT_PROP(sym, mem) VM_IMPORT_PROP(sym, mem)



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#define VM_IMPORT_FUNC(sym, mem) pool_ofs_t mem;



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#include "vmimport.h"



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};



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#endif /* VMPREDEF_H */



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