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c5ecf6c1 | 1 | /** @file\r |
2 | CopyMem() implementation.\r | |
3 | \r | |
2bfb6009 | 4 | The following BaseMemoryLib instances contain the same copy of this file:\r |
c5ecf6c1 | 5 | BaseMemoryLib\r |
6 | BaseMemoryLibMmx\r | |
7 | BaseMemoryLibSse2\r | |
8 | BaseMemoryLibRepStr\r | |
2bfb6009 LG |
9 | BaseMemoryLibOptDxe\r |
10 | BaseMemoryLibOptPei\r | |
c5ecf6c1 | 11 | PeiMemoryLib\r |
12 | DxeMemoryLib\r | |
13 | \r | |
d531bfee | 14 | Copyright (c) 2006, Intel Corporation<BR>\r |
15 | All rights reserved. This program and the accompanying materials\r | |
16 | are licensed and made available under the terms and conditions of the BSD License\r | |
17 | which accompanies this distribution. The full text of the license may be found at\r | |
18 | http://opensource.org/licenses/bsd-license.php\r | |
19 | \r | |
20 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
21 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
22 | \r | |
c5ecf6c1 | 23 | **/\r |
24 | \r | |
25 | #include "MemLibInternals.h"\r | |
26 | \r | |
27 | /**\r | |
28 | Copies a source buffer to a destination buffer, and returns the destination buffer.\r | |
29 | \r | |
30 | This function copies Length bytes from SourceBuffer to DestinationBuffer, and returns\r | |
31 | DestinationBuffer. The implementation must be reentrant, and it must handle the case\r | |
32 | where SourceBuffer overlaps DestinationBuffer.\r | |
33 | If Length is greater than (MAX_ADDRESS - DestinationBuffer + 1), then ASSERT(). \r | |
34 | If Length is greater than (MAX_ADDRESS - SourceBuffer + 1), then ASSERT(). \r | |
35 | \r | |
36 | @param DestinationBuffer Pointer to the destination buffer of the memory copy.\r | |
37 | @param SourceBuffer Pointer to the source buffer of the memory copy.\r | |
38 | @param Length Number of bytes to copy from SourceBuffer to DestinationBuffer.\r | |
39 | \r | |
40 | @return DestinationBuffer.\r | |
41 | \r | |
42 | **/\r | |
43 | VOID *\r | |
44 | EFIAPI\r | |
45 | CopyMem (\r | |
46 | OUT VOID *DestinationBuffer,\r | |
47 | IN CONST VOID *SourceBuffer,\r | |
48 | IN UINTN Length\r | |
49 | )\r | |
50 | {\r | |
2bfb6009 | 51 | if (Length == 0) {\r |
c5ecf6c1 | 52 | return DestinationBuffer;\r |
53 | }\r | |
54 | ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)DestinationBuffer));\r | |
55 | ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)SourceBuffer));\r | |
56 | \r | |
57 | if (DestinationBuffer == SourceBuffer) {\r | |
58 | return DestinationBuffer;\r | |
59 | }\r | |
60 | return InternalMemCopyMem (DestinationBuffer, SourceBuffer, Length);\r | |
61 | }\r |