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