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README.md: describe library limitations

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Kosma Moczek 2014-03-03 15:31:54 +01:00
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@ -100,6 +100,17 @@ Building and running the tests requires the following:
If you have both in your ``$PATH``, running the tests should be as simple as If you have both in your ``$PATH``, running the tests should be as simple as
typing ``make``. typing ``make``.
## Limitations
* Fractional numbers are represented as ``int`` internally, which is 32 bits on
most embedded platforms. Therefore, the maximum supported coordinate precision
is ``[+-]DDDMM.MMMMM``. The library does not check for integer overflow at the
moment; coordinates with more precision will not parse correctly.
* Only a handful of frames is supported right now.
* There's no support for omitting parts of the library from building. As
a workaround, use the ``-ffunction-sections -Wl,--gc-sections`` linker flags
(or equivalent) to remove the unused functions (parsers) from the final image.
## Bugs ## Bugs
There are plenty. Report them on GitHub, or - even better - open a pull request. There are plenty. Report them on GitHub, or - even better - open a pull request.