fxlibc/src/libc/stdio/vsnprintf.c

#include <stdio.h>
#include <fxlibc/printf.h>

int vsnprintf(char * restrict str, size_t size, char const * restrict fmt,
	va_list args)
{
	/* This is valid even if str=NULL. */
	struct __printf_output out = {
		.str = str,
		.size = size,
	};

	return __printf(&out, fmt, &args);
}