2023-05-19 03:18:38 -04:00
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<TITLE>FFIGEN To-do list</TITLE>
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<LINK REV="made" HREF="mailto:lth@acm.org">
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<H2>FFIGEN To-do list</H2>
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Updated 14 June 2000.
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<H3>Intermediate format features</H3>
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<UL>
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<LI> Full ANSI C support:
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<UL>
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<LI> [done] Bitfields.
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<LI> General support for type qualifiers.
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</UL>
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<LI> Output a machine description.
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<LI> Output struct/union sizes.
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<LI> Output structure field offsets.
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<LI> Output line and column information.
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<LI> Retain and output comments.
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<LI> Output source file information (the name of the input file to
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<code>lcc -ffigen</code>); this can
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be useful since the back end can generate C files which
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<code>#includes</code> the source header file.
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<LI> Support certain extensions: Microsoft __huge, __near, __far, __based,
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__cdecl, __pascal; GNU __inline; others?
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</UL>
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<H3>Processing (both front-end and back-end)</H3>
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<UL>
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<LI> Some general support for a policy file?
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<LI> More intelligent macro-expansion support: macros should be expanded
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as far as possible, and extraneous cruft should be removed so that the
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back end can produce better translations.
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<LI> Support for some form of tokenized macros to support certain regular
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and nice rewrites? C libraries like Open Inventor use macros
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heavily in a virtual-function like style:
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<pre>
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#define SoSphSetOverride(_this, state) \
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SoNodeSetOverride((SoNode *)_this, state)
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</pre>
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and it would be nice to provide some support for such cases in the form
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of already-tokenized output.
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</UL>
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<H3>Implementation features</H3>
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<UL>
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<LI> Move to lcc 4.1, and ASDL.
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<LI> [done] Move to lcc 3.6.
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<LI> [done] Proper integration with lcc. Currently, it uses the lcc driver but
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it generates code, performs assembly, and produces file.o (which it need
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not do). In addition, the output file is called SYMBOLS but should
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rather be called filename.ffi.
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</UL>
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<H3>Known bugs</H3>
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<UL>
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<LI> [done] Currently the rhs of a macro is output without any whitespace. This
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is not correct if there are two adjacent identifiers or reserved words,
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which happens in declarations (consider "const int blah"). [Harold]
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</UL>
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<H3>Back-ends</H3>
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<UL>
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<LI> Back-end for Scheme-to-C.
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<LI> Back-end for Gambit-C (Harold's got one working, it also does
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interesting things with Open Inventor macros (see above)).
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<LI> Back-end for Tcl/Tk?
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<LI> Back-ends for ILU and Modula-3.
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<LI> Back-end for STk.
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<LI> Improvements to Chez Scheme back-end.
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</UL>
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<H3>Miscellaneous</H3>
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<UL>
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<LI> Advertise on lcc mailing list.
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</UL>
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<HR>
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<P>
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Press <A HREF="index.html">here</A> to go to the FFIGEN home page.
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<hr>
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<address><a href="mailto:lth@acm.org">lth@acm.org</address>
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