mbrlen.c\multibyte\src - musl - musl - an implementation of the standard library for Linux-based systems

#include <wchar.h>
size_t mbrlen(const char *restrict s, size_t n, mbstate_t *restrict st)
{
	static unsigned internal;
	return mbrtowc(0, s, n, st ? st : (mbstate_t *)&internal);
}