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3eb9473e | 1 | /*++\r |
2 | \r | |
2c7e5c2f HT |
3 | Copyright (c) 2004 - 2006, Intel Corporation. All rights reserved.<BR>\r |
4 | This program and the accompanying materials \r | |
3eb9473e | 5 | are licensed and made available under the terms and conditions of the BSD License \r |
6 | which accompanies this distribution. The full text of the license may be found at \r | |
7 | http://opensource.org/licenses/bsd-license.php \r | |
8 | \r | |
9 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r | |
10 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r | |
11 | \r | |
12 | Module Name:\r | |
13 | \r | |
14 | CompareMemWrapper.c\r | |
15 | \r | |
16 | Abstract: \r | |
17 | \r | |
18 | CompareMem() implementation.\r | |
19 | \r | |
20 | --*/\r | |
21 | \r | |
22 | #include "BaseMemoryLibInternal.h"\r | |
23 | \r | |
24 | /**\r | |
25 | Compares the contents of two buffers.\r | |
26 | \r | |
27 | This function compares Length bytes of SourceBuffer to Length bytes of DestinationBuffer.\r | |
28 | If all Length bytes of the two buffers are identical, then 0 is returned. Otherwise, the\r | |
29 | value returned is the first mismatched byte in SourceBuffer subtracted from the first\r | |
30 | mismatched byte in DestinationBuffer.\r | |
31 | If Length > 0 and DestinationBuffer is NULL and Length > 0, then ASSERT().\r | |
32 | If Length > 0 and SourceBuffer is NULL and Length > 0, then ASSERT().\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 | \r | |
37 | @param DestinationBuffer Pointer to the destination buffer to compare.\r | |
38 | @param SourceBuffer Pointer to the source buffer to compare.\r | |
39 | @param Length Number of bytes to compare.\r | |
40 | \r | |
41 | @return 0 All Length bytes of the two buffers are identical.\r | |
42 | @retval Non-zero The first mismatched byte in SourceBuffer subtracted from the first\r | |
43 | mismatched byte in DestinationBuffer.\r | |
44 | \r | |
45 | **/\r | |
46 | INTN\r | |
47 | EFIAPI\r | |
48 | GlueCompareMem (\r | |
49 | IN CONST VOID *DestinationBuffer,\r | |
50 | IN CONST VOID *SourceBuffer,\r | |
51 | IN UINTN Length\r | |
52 | )\r | |
53 | {\r | |
54 | if (Length == 0) {\r | |
55 | return 0;\r | |
56 | }\r | |
57 | ASSERT (DestinationBuffer != NULL);\r | |
58 | ASSERT (SourceBuffer != NULL);\r | |
59 | ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)DestinationBuffer));\r | |
60 | ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)SourceBuffer));\r | |
61 | \r | |
62 | return InternalMemCompareMem (DestinationBuffer, SourceBuffer, Length);\r | |
63 | }\r |