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608fd3fd | 1 | /** @file\r |
2 | ScanMem16() implementation.\r | |
3 | \r | |
4 | Copyright (c) 2006, Intel Corporation<BR>\r | |
5 | All rights reserved. This program and the accompanying materials\r | |
6 | are licensed and made available under the terms and conditions of the BSD License\r | |
7 | which accompanies this distribution. The full text of the license may be found at\r | |
8 | http://opensource.org/licenses/bsd-license.php\r | |
9 | \r | |
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
12 | \r | |
13 | Module Name: ScanMem16Wrapper.c\r | |
14 | \r | |
15 | The following BaseMemoryLib instances share the same version of this file:\r | |
16 | \r | |
17 | BaseMemoryLib\r | |
18 | BaseMemoryLibMmx\r | |
19 | BaseMemoryLibSse2\r | |
20 | BaseMemoryLibRepStr\r | |
21 | PeiMemoryLib\r | |
add13dc2 | 22 | DxeMemoryLib\r |
608fd3fd | 23 | \r |
24 | **/\r | |
25 | \r | |
24de7645 | 26 | #include "MemLibInternals.h"\r |
608fd3fd | 27 | \r |
28 | /**\r | |
4ba61e5e | 29 | Scans a target buffer for a 16-bit value, and returns a pointer to the matching 16-bit value\r |
30 | in the target buffer.\r | |
608fd3fd | 31 | \r |
4ba61e5e | 32 | This function searches target the buffer specified by Buffer and Length from the lowest\r |
33 | address to the highest address for a 16-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 | |
36 | If Length > 0 and Buffer is NULL, then ASSERT().\r | |
608fd3fd | 37 | If Buffer is not aligned on a 16-bit boundary, then ASSERT().\r |
add13dc2 | 38 | If Length is not aligned on a 16-bit boundary, then ASSERT().\r |
511710d6 | 39 | If Length is greater than (MAX_ADDRESS ? Buffer + 1), then ASSERT(). \r |
608fd3fd | 40 | \r |
4ba61e5e | 41 | @param Buffer Pointer to the target buffer to scan.\r |
42 | @param Length Number of bytes in Buffer to scan.\r | |
43 | @param Value Value to search for in the target buffer.\r | |
608fd3fd | 44 | \r |
4ba61e5e | 45 | @return A pointer to the matching byte in the target buffer or NULL otherwise.\r |
608fd3fd | 46 | \r |
47 | **/\r | |
48 | VOID *\r | |
49 | EFIAPI\r | |
50 | ScanMem16 (\r | |
24e25d11 | 51 | IN CONST VOID *Buffer,\r |
52 | IN UINTN Length,\r | |
53 | IN UINT16 Value\r | |
608fd3fd | 54 | )\r |
55 | {\r | |
add13dc2 | 56 | if (Length == 0) {\r |
4ba61e5e | 57 | return NULL;\r |
58 | }\r | |
59 | \r | |
608fd3fd | 60 | ASSERT (Buffer != NULL);\r |
61 | ASSERT (((UINTN)Buffer & (sizeof (Value) - 1)) == 0);\r | |
4ba61e5e | 62 | ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)Buffer));\r |
add13dc2 | 63 | ASSERT ((Length & (sizeof (Value) - 1)) == 0);\r |
608fd3fd | 64 | \r |
add13dc2 | 65 | return (VOID*)InternalMemScanMem16 (Buffer, Length / sizeof (Value), Value);\r |
608fd3fd | 66 | }\r |