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e1f414b6 | 1 | /** @file\r |
2 | CopyMem() implementation.\r | |
3 | \r | |
2bfb6009 | 4 | The following BaseMemoryLib instances contain the same copy of this file:\r |
eb1c78db | 5 | \r |
e1f414b6 | 6 | BaseMemoryLib\r |
7 | BaseMemoryLibMmx\r | |
8 | BaseMemoryLibSse2\r | |
9 | BaseMemoryLibRepStr\r | |
2bfb6009 LG |
10 | BaseMemoryLibOptDxe\r |
11 | BaseMemoryLibOptPei\r | |
e1f414b6 | 12 | PeiMemoryLib\r |
1fef058f | 13 | UefiMemoryLib\r |
e1f414b6 | 14 | \r |
15c952e7 | 15 | Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>\r |
2fcf0abf | 16 | This program and the accompanying materials\r |
d531bfee | 17 | are licensed and made available under the terms and conditions of the BSD License\r |
18 | which accompanies this distribution. The full text of the license may be found at\r | |
15c952e7 | 19 | http://opensource.org/licenses/bsd-license.php.\r |
d531bfee | 20 | \r |
21 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
22 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
23 | \r | |
e1f414b6 | 24 | **/\r |
25 | \r | |
e1f414b6 | 26 | #include "MemLibInternals.h"\r |
27 | \r | |
28 | /**\r | |
29 | Copies a source buffer to a destination buffer, and returns the destination buffer.\r | |
30 | \r | |
31 | This function copies Length bytes from SourceBuffer to DestinationBuffer, and returns\r | |
32 | DestinationBuffer. The implementation must be reentrant, and it must handle the case\r | |
33 | where SourceBuffer overlaps DestinationBuffer.\r | |
eb1c78db | 34 | \r |
35 | If Length is greater than (MAX_ADDRESS - DestinationBuffer + 1), then ASSERT().\r | |
36 | If Length is greater than (MAX_ADDRESS - SourceBuffer + 1), then ASSERT().\r | |
e1f414b6 | 37 | \r |
15c952e7 | 38 | @param DestinationBuffer A pointer to the destination buffer of the memory copy.\r |
39 | @param SourceBuffer A pointer to the source buffer of the memory copy.\r | |
40 | @param Length The number of bytes to copy from SourceBuffer to DestinationBuffer.\r | |
e1f414b6 | 41 | \r |
42 | @return DestinationBuffer.\r | |
43 | \r | |
44 | **/\r | |
45 | VOID *\r | |
46 | EFIAPI\r | |
47 | CopyMem (\r | |
48 | OUT VOID *DestinationBuffer,\r | |
49 | IN CONST VOID *SourceBuffer,\r | |
50 | IN UINTN Length\r | |
51 | )\r | |
52 | {\r | |
3afce733 | 53 | if (Length == 0) {\r |
e1f414b6 | 54 | return DestinationBuffer;\r |
55 | }\r | |
56 | ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)DestinationBuffer));\r | |
57 | ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)SourceBuffer));\r | |
58 | \r | |
59 | if (DestinationBuffer == SourceBuffer) {\r | |
60 | return DestinationBuffer;\r | |
61 | }\r | |
62 | return InternalMemCopyMem (DestinationBuffer, SourceBuffer, Length);\r | |
63 | }\r |