Moved the MdePkg to OldMdePkg so that new code in MdePkg does not break existing...

[mirror_edk2.git] / OldMdePkg / Library / BaseMemoryLib / CopyMemWrapper.c

diff --git a/OldMdePkg/Library/BaseMemoryLib/CopyMemWrapper.c b/OldMdePkg/Library/BaseMemoryLib/CopyMemWrapper.c
new file mode 100644 (file)
index 0000000..9e620e2
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+++ b/OldMdePkg/Library/BaseMemoryLib/CopyMemWrapper.c
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+/** @file\r
+  CopyMem() implementation.\r
+\r
+  Copyright (c) 2006, Intel Corporation<BR>\r
+  All rights reserved. This program and the accompanying materials\r
+  are licensed and made available under the terms and conditions of the BSD License\r
+  which accompanies this distribution.  The full text of the license may be found at\r
+  http://opensource.org/licenses/bsd-license.php\r
+\r
+  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
+  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
+\r
+  Module Name:  CopyMemWrapper.c\r
+\r
+  The following BaseMemoryLib instances share the same version of this file:\r
+\r
+    BaseMemoryLib\r
+    BaseMemoryLibMmx\r
+    BaseMemoryLibSse2\r
+    BaseMemoryLibRepStr\r
+    PeiMemoryLib\r
+    DxeMemoryLib\r
+\r
+**/\r
+\r
+#include "MemLibInternals.h"\r
+\r
+/**\r
+  Copies a source buffer to a destination buffer, and returns the destination buffer.\r
+\r
+  This function copies Length bytes from SourceBuffer to DestinationBuffer, and returns\r
+  DestinationBuffer.  The implementation must be reentrant, and it must handle the case\r
+  where SourceBuffer overlaps DestinationBuffer.\r
+  If Length is greater than (MAX_ADDRESS - DestinationBuffer + 1), then ASSERT(). \r
+  If Length is greater than (MAX_ADDRESS - SourceBuffer + 1), then ASSERT(). \r
+\r
+  @param  DestinationBuffer   Pointer to the destination buffer of the memory copy.\r
+  @param  SourceBuffer        Pointer to the source buffer of the memory copy.\r
+  @param  Length              Number of bytes to copy from SourceBuffer to DestinationBuffer.\r
+\r
+  @return DestinationBuffer.\r
+\r
+**/\r
+VOID *\r
+EFIAPI\r
+CopyMem (\r
+  OUT VOID       *DestinationBuffer,\r
+  IN CONST VOID  *SourceBuffer,\r
+  IN UINTN       Length\r
+  )\r
+{\r
+  if (Length == 0) {\r
+    return DestinationBuffer;\r
+  }\r
+  ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)DestinationBuffer));\r
+  ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)SourceBuffer));\r
+\r
+  if (DestinationBuffer == SourceBuffer) {\r
+    return DestinationBuffer;\r
+  }\r
+  return InternalMemCopyMem (DestinationBuffer, SourceBuffer, Length);\r
+}\r