1 files changed, 100 insertions, 0 deletions
diff --git a/src/lib/kStuff/kHlp/Generic/kHlpMemMove.c b/src/lib/kStuff/kHlp/Generic/kHlpMemMove.c
new file mode 100644
index 0000000..438a299
--- /dev/null
+++ b/src/lib/kStuff/kHlp/Generic/kHlpMemMove.c
@@ -0,0 +1,100 @@
+/* $Id: kHlpMemMove.c 29 2009-07-01 20:30:29Z bird $ */
+/** @file
+ * kHlpString - kHlpMemMove.
+ */
+
+/*
+ * Copyright (c) 2006-2007 Knut St. Osmundsen <bird-kStuff-spamix@anduin.net>
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following
+ * conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/*******************************************************************************
+*   Header Files                                                               *
+*******************************************************************************/
+#include <k/kHlpString.h>
+
+
+KHLP_DECL(void *) kHlpMemMove(void *pv1, const void *pv2, KSIZE cb)
+{
+    union
+    {
+        void *pv;
+        KU8 *pb;
+        KUPTR *pu;
+    } u1;
+    union
+    {
+        const void *pv;
+        volatile KU8 *pb;
+        volatile KUPTR *pu;
+    } u2;
+
+    u1.pv = pv1;
+    u2.pv = pv2;
+
+    if ((KUPTR)u1.pb <= (KUPTR)u2.pb)
+    {
+        /* forward copy */
+        if (cb >= 32)
+        {
+            while (cb > sizeof(KUPTR))
+            {
+                KUPTR u = *u2.pu++;
+                *u1.pu++ = u;
+                cb -= sizeof(KUPTR);
+            }
+        }
+
+        while (cb-- > 0)
+        {
+            KU8 b = *u2.pb++;
+            *u1.pb++ = b;
+        }
+    }
+    else
+    {
+        /* backwards copy */
+        u1.pb += cb;
+        u2.pb += cb;
+
+        if (cb >= 32)
+        {
+            while (cb > sizeof(KUPTR))
+            {
+                KUPTR u = *--u2.pu;
+                *--u1.pu = u;
+                cb -= sizeof(KUPTR);
+            }
+        }
+
+        while (cb-- > 0)
+        {
+            KU8 b = *--u2.pb;
+            *--u1.pb = b;
+        }
+    }
+
+    return pv1;
+}
+
+