QIF Import C++ Conversion status

[Brian Rater]

About this time last year, I said that I was interested in converting the
QIF Import to C++.  I did some top level investigation for a couple of
months to figure out a path forward, then work and life got in the way and
I had to set it aside.  Now I am retired and caught up on everything, so
I'm starting to get back into this project.

I don't want to make any changes to the UI code more than necessary.  I'm
learning a lot here - gnucash, glib, scheme - trying to figure out a UI
toolkit that I'm not familiar with seems too much, especially given that I
am still learning the functionality of the import itself.

The path that I have been experimenting with is to create a thin C API
layer to wrap the (not yet designed) C++ interface and update the GUI C
code to replace all scheme calls and data structures with C API calls.  All
non-gui data structures would be moved into the C++ implementation.

Let me know if there is another direction that would be preferable.

Where my sandbox code stands right now is that I have a version of the UI
code that replaces all guile with C calls.  The C calls are not implemented
and need better organization and documentation if I continue down this
path.  The C++ interface design would be the next step after that.

I plan to submit the project for review at various phases - defining the C
API, defining the C++ interface, multiple implementation  and test reviews.

For the C++ classes, I am planning to create a set of base classes that can
someday be used as a basis for new implementations of other import
functionality, and QIF specific classes that inherit from these base
classes.

Brian
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