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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 |
9344f092 | 16 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
eb1c78db | 17 | \r |
dd51a993 | 18 | **/\r |
19 | \r | |
20 | #include "MemLibInternals.h"\r | |
21 | \r | |
22 | /**\r | |
23 | Scans a target buffer for a 64-bit value, and returns a pointer to the matching 64-bit value\r | |
24 | in the target buffer.\r | |
25 | \r | |
56385d49 | 26 | This function searches the target buffer specified by Buffer and Length from the lowest\r |
dd51a993 | 27 | address to the highest address for a 64-bit value that matches Value. If a match is found,\r |
28 | then a pointer to the matching byte in the target buffer is returned. If no match is found,\r | |
29 | then NULL is returned. If Length is 0, then NULL is returned.\r | |
9095d37b | 30 | \r |
dd51a993 | 31 | If Length > 0 and Buffer is NULL, then ASSERT().\r |
32 | If Buffer is not aligned on a 64-bit boundary, then ASSERT().\r | |
33 | If Length is not aligned on a 64-bit boundary, then ASSERT().\r | |
eb1c78db | 34 | If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().\r |
dd51a993 | 35 | \r |
2fc59a00 | 36 | @param Buffer The pointer to the target buffer to scan.\r |
37 | @param Length The number of bytes in Buffer to scan.\r | |
38 | @param Value The value to search for in the target buffer.\r | |
dd51a993 | 39 | \r |
40 | @return A pointer to the matching byte in the target buffer or NULL otherwise.\r | |
41 | \r | |
42 | **/\r | |
43 | VOID *\r | |
44 | EFIAPI\r | |
45 | ScanMem64 (\r | |
46 | IN CONST VOID *Buffer,\r | |
47 | IN UINTN Length,\r | |
48 | IN UINT64 Value\r | |
49 | )\r | |
50 | {\r | |
51 | if (Length == 0) {\r | |
52 | return NULL;\r | |
53 | }\r | |
54 | \r | |
55 | ASSERT (Buffer != NULL);\r | |
56 | ASSERT (((UINTN)Buffer & (sizeof (Value) - 1)) == 0);\r | |
57 | ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)Buffer));\r | |
58 | ASSERT ((Length & (sizeof (Value) - 1)) == 0);\r | |
59 | \r | |
60 | return (VOID*)InternalMemScanMem64 (Buffer, Length / sizeof (Value), Value);\r | |
61 | }\r |