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dd51a993 | 1 | /** @file\r |
2 | ScanMem64() implementation.\r | |
3 | \r | |
2bfb6009 | 4 | The following BaseMemoryLib instances contain the same copy of this file:\r |
dd51a993 | 5 | \r |
6 | BaseMemoryLib\r | |
7 | BaseMemoryLibMmx\r | |
8 | BaseMemoryLibSse2\r | |
9 | BaseMemoryLibRepStr\r | |
2bfb6009 LG |
10 | BaseMemoryLibOptDxe\r |
11 | BaseMemoryLibOptPei\r | |
dd51a993 | 12 | PeiMemoryLib\r |
1fef058f | 13 | UefiMemoryLib\r |
dd51a993 | 14 | \r |
9095d37b | 15 | Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>\r |
19388d29 | 16 | This program and the accompanying materials\r |
eb1c78db | 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 | |
2fc59a00 | 19 | http://opensource.org/licenses/bsd-license.php.\r |
eb1c78db | 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 | |
dd51a993 | 24 | **/\r |
25 | \r | |
26 | #include "MemLibInternals.h"\r | |
27 | \r | |
28 | /**\r | |
29 | Scans a target buffer for a 64-bit value, and returns a pointer to the matching 64-bit value\r | |
30 | in the target buffer.\r | |
31 | \r | |
56385d49 | 32 | This function searches the target buffer specified by Buffer and Length from the lowest\r |
dd51a993 | 33 | address to the highest address for a 64-bit value that matches Value. If a match is found,\r |
34 | then a pointer to the matching byte in the target buffer is returned. If no match is found,\r | |
35 | then NULL is returned. If Length is 0, then NULL is returned.\r | |
9095d37b | 36 | \r |
dd51a993 | 37 | If Length > 0 and Buffer is NULL, then ASSERT().\r |
38 | If Buffer is not aligned on a 64-bit boundary, then ASSERT().\r | |
39 | If Length is not aligned on a 64-bit boundary, then ASSERT().\r | |
cc4e0485 | 40 | If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().\r |
dd51a993 | 41 | \r |
2fc59a00 | 42 | @param Buffer The pointer to the target buffer to scan.\r |
43 | @param Length The number of bytes in Buffer to scan.\r | |
44 | @param Value The value to search for in the target buffer.\r | |
dd51a993 | 45 | \r |
46 | @return A pointer to the matching byte in the target buffer or NULL otherwise.\r | |
47 | \r | |
48 | **/\r | |
49 | VOID *\r | |
50 | EFIAPI\r | |
51 | ScanMem64 (\r | |
52 | IN CONST VOID *Buffer,\r | |
53 | IN UINTN Length,\r | |
54 | IN UINT64 Value\r | |
55 | )\r | |
56 | {\r | |
57 | if (Length == 0) {\r | |
58 | return NULL;\r | |
59 | }\r | |
60 | \r | |
61 | ASSERT (Buffer != NULL);\r | |
62 | ASSERT (((UINTN)Buffer & (sizeof (Value) - 1)) == 0);\r | |
63 | ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)Buffer));\r | |
64 | ASSERT ((Length & (sizeof (Value) - 1)) == 0);\r | |
65 | \r | |
66 | return (VOID*)InternalMemScanMem64 (Buffer, Length / sizeof (Value), Value);\r | |
67 | }\r |