callback_printf enables portable sprintf, snprintf, vsprintf and vsnprintf like functions. The code includes samples for those functions. It's fast, threadsafe and without dependencies to other libraries. It supports all formats of C 11 standard. wchar_t arguments and strings are converted to UTF-8.
embedded binary portable sprintf octal long utf8 ternary quaternary snprintf vsprintf vsnprintf nonal numeric-systems embedded-systems-sprintf vsprintf-bench hexadecimal-float-values user-defined-data-types long-double-support
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Updated
Dec 30, 2025 - C