* TODO: Removed.
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TODO
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TODO
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Long term vision
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================
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Remove distinction between subcircuits and models as much as possible.
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With a Spice netlist compiler (to be written), the subcircuit can be
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translated into a compiled version, dynamically loadable into the
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simulation core.
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Using the approach outlined above, we can cut down on maintenance for
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the bsim[123], bjt, and other transistor models. For inspiration,
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look at *.model files in ACS (Al's Circuit Simulator).
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List of Things To Do
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====================
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Standards conformance
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---------------------
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Add proper copyright headers to every source, header, documentation
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and other files.
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Fix all compiler warnings.
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Remove smktemp() in favor of tmpfile() or other ANSI C equivalent;
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Note: different symantics!
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Write a asprintf() replacement for systems that don't have it
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available. Also check how this function interacts with the garbage
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collector.
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Prefix all functions in the spice library with spice_*.
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Usability issues
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------------------
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Plug all memory leaks; use debauch (http://quorum.tamu.edu/jon/gnu/)
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or another memory checker to find them. Could also try a garbage
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collector (http://www.hpl.hp.com/personal/Hans_Boehm/gc/) to
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circumvent memory leaks.
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Substitute help interface by call to webbrowser or info reader and get
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rid of all help-related code.
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Refactorings
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------------
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Netlist parsing. The circuit directory currrently has definitions for
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parsing one model line per device. Get this generalized into a
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structure that codifies the changes between the devices. At a later
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stage, distribute the structure into the devices directories. The
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generic parser remains in the spice library.
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Separate ngspice and nutmeg; i.e., no more SIMULATOR define. ngspice
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should probably only contain the batch processor. nutmeg would have
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the complete frontend.
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All frontend commands can now be found in the frontend directory.
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Move frontend helper functions into frontend directory as well.
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Not all files that define commands, start with com_*; fix that.
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Make devices dynamically loadable. Perhaps use framework from glib
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(http://developer.gnome.org/doc/API/glib/index.html).
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Integrate bsim3, bsim3v1, bsim3v2 to use a single codebase instead of
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three only slighty differing implementations. This also cuts down
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compilation time.
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Code for determing memory limits and resource usage, now use
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setjmp()/longjmp(), replace this by rlimit() on systems that have it.
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Program frontend in Guile (http://www.gnu.org/software/guile ),
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Python (http://www.python.org ), or SWIG (http://www.swig.org). This
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shows where the spicelib API needs refining.
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Testability
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-----------
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Verify C code device models by building equivalent netlists and
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comparing simulation results. Equivalent netlists also help document
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the models currently in Spice.
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Use benchmarking suite to profile Spice. Use gcov to measure coverage
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(and to find out where more tests are needed.) Make profiling support
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a configure switch.
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Devise a way to compare outputs from different circuit simulators to
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verify the results of the simulations.
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Add small tests for all functions in the complex library in
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src/maths/cmaths.
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Add tests for all functions in the sparse matrix library in
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src/maths/sparse.
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Add tests for all functions in the polynomial library in
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src/maths/poly.
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Add tests for all functions in the derivative library in
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src/maths/deriv.
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Add more circuit tests into the tests directory.
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Documentation
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-------------
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Make a document that contains a high level architectural overview of
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spice.
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Convert ngspice.texi further to texinfo format. [PARTIAL]
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Distribute devices documentation into the devices tree. This makes it
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easier for developers to update documentation in concert with code.
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Update manual pages for spice and nutmeg. Perhaps generate them with
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c2man or some other documentation generation utility.
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