Top 3 C snprintf Projects

printf

16 2,345 0.0 C

Tiny, fast, non-dependent and fully loaded printf implementation for embedded systems. Extensive test suite passing.
printf

4 361 0.0 C

Tiny, fast(ish), self-contained, fully loaded printf, sprinf etc. implementation; particularly useful in embedded systems. (by eyalroz)

Project mention: MISRA C | news.ycombinator.com | 2023-11-07

From my experience, maintaining a standalone/embedded printf library - MISRA is a combination of two things: Common-sense rules, and pain-in-the-ass rules. Example of the latter: Avoiding implementation-defined types like `int` in places where my code doesn't care about what sizeof(int) is.
I was able to accommodate most (?) of the MISRA rules (https://github.com/eyalroz/printf/issues/77), but mine is just a small library, so I don't know how restrictive they would be for a larger codebase.

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callback_printf

1 1 8.0 C

callback_printf allows the implementation of portable sprintf, snprintf, vsprintf and vsnprintf like output functions. The code includes wrappers for those functions. It supports all formats of the C 11 standard. wchar_t arguments and strings are printed as UTF-8. It's pretty fast, threadsafe and has no dependencies to other libraries.

Project mention: nanoprintf VS callback_printf - a user suggested alternative | libhunt.com/r/nanoprintf | 2023-08-16

callback_printf is a fully loaded and fast sprintf wrapper that supports a lot of numeral systems and prints Unicode as UTF8. It comes with a little benchmark for checking vsprintf implementations.

NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020).