LibC: Implement wmemmove

2 files changed, 16 insertions, 0 deletions

diff --git a/Userland/Libraries/LibC/wchar.cpp b/Userland/Libraries/LibC/wchar.cpp
index 13208004c2..4bdc43545a 100644
--- a/Userland/Libraries/LibC/wchar.cpp
+++ b/Userland/Libraries/LibC/wchar.cpp
@@ -402,4 +402,19 @@ wchar_t* wmemset(wchar_t* wcs, wchar_t wc, size_t n)
 
     return wcs;
 }
+
+wchar_t* wmemmove(wchar_t* dest, const wchar_t* src, size_t n)
+{
+    if (dest > src) {
+        for (size_t i = 1; i <= n; i++) {
+            dest[n - i] = src[n - i];
+        }
+    } else if (dest < src) {
+        for (size_t i = 0; i < n; i++) {
+            dest[i] = src[i];
+        }
+    }
+
+    return dest;
+}
 }
diff --git a/Userland/Libraries/LibC/wchar.h b/Userland/Libraries/LibC/wchar.h
index 7f731ad38b..8eea8e919e 100644
--- a/Userland/Libraries/LibC/wchar.h
+++ b/Userland/Libraries/LibC/wchar.h
@@ -46,5 +46,6 @@ wchar_t* wcsstr(const wchar_t*, const wchar_t*);
 wchar_t* wmemchr(const wchar_t*, wchar_t, size_t);
 wchar_t* wmemcpy(wchar_t*, const wchar_t*, size_t);
 wchar_t* wmemset(wchar_t*, wchar_t, size_t);
+wchar_t* wmemmove(wchar_t*, const wchar_t*, size_t);
 
 __END_DECLS