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

[mirror_edk2.git] / OldMdePkg / Library / BaseMemoryLibRepStr / CompareMemWrapper.c

diff --git a/OldMdePkg/Library/BaseMemoryLibRepStr/CompareMemWrapper.c b/OldMdePkg/Library/BaseMemoryLibRepStr/CompareMemWrapper.c
new file mode 100644 (file)
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+++ b/OldMdePkg/Library/BaseMemoryLibRepStr/CompareMemWrapper.c
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+/** @file\r
+  CompareMem() 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:  CompareMemWrapper.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
+  Compares the contents of two buffers.\r
+\r
+  This function compares Length bytes of SourceBuffer to Length bytes of DestinationBuffer.\r
+  If all Length bytes of the two buffers are identical, then 0 is returned.  Otherwise, the\r
+  value returned is the first mismatched byte in SourceBuffer subtracted from the first\r
+  mismatched byte in DestinationBuffer.\r
+  If Length > 0 and DestinationBuffer is NULL and Length > 0, then ASSERT().\r
+  If Length > 0 and SourceBuffer is NULL and Length > 0, then ASSERT().\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
+\r
+  @param  DestinationBuffer Pointer to the destination buffer to compare.\r
+  @param  SourceBuffer      Pointer to the source buffer to compare.\r
+  @param  Length            Number of bytes to compare.\r
+\r
+  @return 0                 All Length bytes of the two buffers are identical.\r
+  @retval Non-zero          The first mismatched byte in SourceBuffer subtracted from the first\r
+                            mismatched byte in DestinationBuffer.\r
+\r
+**/\r
+INTN\r
+EFIAPI\r
+CompareMem (\r
+  IN CONST VOID  *DestinationBuffer,\r
+  IN CONST VOID  *SourceBuffer,\r
+  IN UINTN       Length\r
+  )\r
+{\r
+  if (Length == 0) {\r
+    return 0;\r
+  }\r
+  ASSERT (DestinationBuffer != NULL);\r
+  ASSERT (SourceBuffer != NULL);\r
+  ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)DestinationBuffer));\r
+  ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)SourceBuffer));\r
+\r
+  return InternalMemCompareMem (DestinationBuffer, SourceBuffer, Length);\r
+}\r