Included in this repository is a relatively simple implementation of
vsnprintf that I wrote in the course of an hour or two
for use in a hobbyist microkernel. I've found myself writing this code
or similar several times in the past, so decided to write a reasonably
comprehensive implementation of
snprintf that covers most of my use
It does not include support for:
- Floating point: FP shouldn't be used in a kernel, and printing floating point isn't something I'm interesting in figuring out at the moment.
%n: I've never needed it. It would be reasonably trivial (5 or 6 lines) to implement.
- Wide characters: I don't plan on supporting anything other than UTF-8. Again, this should be a short patch if you need it.
*precision, i.e. specifying precision in the next argument: I haven't needed it in the kernel. If you need it, it's a short patch away.
- POSIX extensions such as
*n$style format specifiers, as well as the
'(thousands separator) format flag. These are avoided purely for simplicity of the implementation.
The code has been written with extensibility in mind, so all but the POSIX extensions and floating point support would be easy to add if needed.
Copyright © 2018, Joe Davis firstname.lastname@example.org
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