Split wrapper functions into separate source files to reduce image code size

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@168 6f19259b-4bc3-4df7-8a09-765794883524

MdePkg/Library/BaseMemoryLibRepStr/CopyMemWrapper.c

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+/** @file
+  CopyMem() implementation.
+
+  Copyright (c) 2006, Intel Corporation<BR>
+  All rights reserved. This program and the accompanying materials
+  are licensed and made available under the terms and conditions of the BSD License
+  which accompanies this distribution.  The full text of the license may be found at
+  http://opensource.org/licenses/bsd-license.php
+
+  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+  Module Name:  CopyMemWrapper.c
+
+  The following BaseMemoryLib instances share the same version of this file:
+
+    BaseMemoryLib
+    BaseMemoryLibMmx
+    BaseMemoryLibSse2
+    BaseMemoryLibRepStr
+    PeiMemoryLib
+    UefiMemoryLib
+
+**/
+
+#include "MemLibInternals.h"
+
+/**
+  Copy Length bytes from Source to Destination.
+
+  This function copies Length bytes from SourceBuffer to DestinationBuffer, and
+  returns DestinationBuffer. The implementation must be reentrant, and it must
+  handle the case where SourceBuffer overlaps DestinationBuffer.
+
+  If Length is greater than (MAX_ADDRESS - DestinationBuffer + 1), then
+  ASSERT().
+  If Length is greater than (MAX_ADDRESS - SourceBuffer + 1), then ASSERT().
+
+  @param  Destination Target of copy
+  @param  Source Place to copy from
+  @param  Length Number of bytes to copy
+
+  @return Destination
+
+**/
+VOID *
+EFIAPI
+CopyMem (
+  OUT     VOID                      *Destination,
+  IN      CONST VOID                *Source,
+  IN      UINTN                     Length
+  )
+{
+  ASSERT (
+    Destination == NULL ||
+    Length <= MAX_ADDRESS - (UINTN)Destination + 1
+    );
+  ASSERT (
+    Source == NULL ||
+    Length <= MAX_ADDRESS - (UINTN)Source + 1
+    );
+  if (Destination == Source || Length == 0) {
+    return Destination;
+  }
+  return InternalMemCopyMem (Destination, Source, Length);
+}