projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 |
| c33c6476 HT |
15 | Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>\r |
| 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 | |
| 19 | http://opensource.org/licenses/bsd-license.php\r | |
| 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 |
| 38 | @param DestinationBuffer Pointer to the destination buffer of the memory copy.\r | |
| 39 | @param SourceBuffer Pointer to the source buffer of the memory copy.\r | |
| 40 | @param Length Number of bytes to copy from SourceBuffer to DestinationBuffer.\r | |
| 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 | |
| 2bfb6009 | 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 |