github.com/afumu/libc@v0.0.6/musl/src/string/wcsnlen.c (about)

     1  #include <wchar.h>
     2  
     3  size_t wcsnlen(const wchar_t *s, size_t n)
     4  {
     5  	const wchar_t *z = wmemchr(s, 0, n);
     6  	if (z) n = z-s;
     7  	return n;
     8  }