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

#include <wchar.h>
wchar_t *wmemmove(wchar_t *d, const wchar_t *s, size_t n)
{
	wchar_t *d0 = d;
	if ((size_t)(d-s) < n)
		while (n--) d[n] = s[n];
	else
		while (n--) *d++ = *s++;
	return d0;
}