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7b3b4b29 1/** @file\r
2 ScanMem16() implementation.\r
3\r
2bfb6009 4 The following BaseMemoryLib instances contain the same copy of this file:\r
7b3b4b29 5\r
6 BaseMemoryLib\r
7 BaseMemoryLibMmx\r
8 BaseMemoryLibSse2\r
9 BaseMemoryLibRepStr\r
2bfb6009
LG
10 BaseMemoryLibOptDxe\r
11 BaseMemoryLibOptPei\r
7b3b4b29 12 PeiMemoryLib\r
1fef058f 13 UefiMemoryLib\r
7b3b4b29 14\r
1fef058f 15 Copyright (c) 2006 - 2009, Intel Corporation<BR>\r
eb1c78db 16 All rights reserved. This program and the accompanying materials\r
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
19 http://opensource.org/licenses/bsd-license.php\r
1efcc4ae 20\r
eb1c78db 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
7b3b4b29 23\r
eb1c78db 24**/\r
7b3b4b29 25\r
26#include "MemLibInternals.h"\r
27\r
28/**\r
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
31\r
56385d49 32 This function searches the target buffer specified by Buffer and Length from the lowest\r
7b3b4b29 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
eb1c78db 36 \r
7b3b4b29 37 If Length > 0 and Buffer is NULL, then ASSERT().\r
38 If Buffer is not aligned on a 16-bit boundary, then ASSERT().\r
39 If Length is not aligned on a 16-bit boundary, then ASSERT().\r
eb1c78db 40 If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().\r
7b3b4b29 41\r
42 @param Buffer Pointer to the target buffer to scan.\r
43 @param Length Number of bytes in Buffer to scan.\r
44 @param Value Value to search for in the target buffer.\r
45\r
46 @return A pointer to the matching byte in the target buffer or NULL otherwise.\r
47\r
48**/\r
49VOID *\r
50EFIAPI\r
51ScanMem16 (\r
52 IN CONST VOID *Buffer,\r
53 IN UINTN Length,\r
54 IN UINT16 Value\r
55 )\r
56{\r
2bfb6009 57 if (Length == 0) {\r
7b3b4b29 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*)InternalMemScanMem16 (Buffer, Length / sizeof (Value), Value);\r
67}\r