]>
Commit | Line | Data |
---|---|---|
dd51a993 | 1 | /** @file\r |
2 | ScanMem32() implementation.\r | |
3 | \r | |
2bfb6009 | 4 | The following BaseMemoryLib instances contain the same copy of this file:\r |
dd51a993 | 5 | BaseMemoryLib\r |
6 | BaseMemoryLibMmx\r | |
7 | BaseMemoryLibSse2\r | |
8 | BaseMemoryLibRepStr\r | |
2bfb6009 LG |
9 | BaseMemoryLibOptDxe\r |
10 | BaseMemoryLibOptPei\r | |
dd51a993 | 11 | PeiMemoryLib\r |
1fef058f | 12 | UefiMemoryLib\r |
dd51a993 | 13 | \r |
9095d37b | 14 | Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>\r |
9344f092 | 15 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
eb1c78db | 16 | \r |
dd51a993 | 17 | **/\r |
18 | \r | |
19 | #include "MemLibInternals.h"\r | |
20 | \r | |
21 | /**\r | |
22 | Scans a target buffer for a 32-bit value, and returns a pointer to the matching 32-bit value\r | |
23 | in the target buffer.\r | |
24 | \r | |
56385d49 | 25 | This function searches the target buffer specified by Buffer and Length from the lowest\r |
dd51a993 | 26 | address to the highest address for a 32-bit value that matches Value. If a match is found,\r |
27 | then a pointer to the matching byte in the target buffer is returned. If no match is found,\r | |
28 | then NULL is returned. If Length is 0, then NULL is returned.\r | |
9095d37b | 29 | \r |
dd51a993 | 30 | If Length > 0 and Buffer is NULL, then ASSERT().\r |
31 | If Buffer is not aligned on a 32-bit boundary, then ASSERT().\r | |
32 | If Length is not aligned on a 32-bit boundary, then ASSERT().\r | |
cc4e0485 | 33 | If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().\r |
dd51a993 | 34 | \r |
2fc59a00 | 35 | @param Buffer The pointer to the target buffer to scan.\r |
36 | @param Length The number of bytes in Buffer to scan.\r | |
37 | @param Value The value to search for in the target buffer.\r | |
dd51a993 | 38 | \r |
39 | @return A pointer to the matching byte in the target buffer or NULL otherwise.\r | |
40 | \r | |
41 | **/\r | |
42 | VOID *\r | |
43 | EFIAPI\r | |
44 | ScanMem32 (\r | |
45 | IN CONST VOID *Buffer,\r | |
46 | IN UINTN Length,\r | |
47 | IN UINT32 Value\r | |
48 | )\r | |
49 | {\r | |
50 | if (Length == 0) {\r | |
51 | return NULL;\r | |
52 | }\r | |
53 | \r | |
54 | ASSERT (Buffer != NULL);\r | |
55 | ASSERT (((UINTN)Buffer & (sizeof (Value) - 1)) == 0);\r | |
56 | ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)Buffer));\r | |
57 | ASSERT ((Length & (sizeof (Value) - 1)) == 0);\r | |
58 | \r | |
59 | return (VOID*)InternalMemScanMem32 (Buffer, Length / sizeof (Value), Value);\r | |
60 | }\r |