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c5ecf6c1 1/** @file\r
2 ScanMem16() implementation.\r
3\r
2bfb6009 4 The following BaseMemoryLib instances contain the same copy of this file:\r
eb1c78db 5\r
c5ecf6c1 6 BaseMemoryLib\r
7 BaseMemoryLibMmx\r
8 BaseMemoryLibSse2\r
9 BaseMemoryLibRepStr\r
2bfb6009
LG
10 BaseMemoryLibOptDxe\r
11 BaseMemoryLibOptPei\r
c5ecf6c1 12 PeiMemoryLib\r
1fef058f 13 UefiMemoryLib\r
c5ecf6c1 14\r
9095d37b 15 Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>\r
085c3968 16 This program and the accompanying materials\r
d531bfee 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
15c952e7 19 http://opensource.org/licenses/bsd-license.php.\r
d531bfee 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
c5ecf6c1 24**/\r
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
c5ecf6c1 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
9095d37b 36\r
c5ecf6c1 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
c5ecf6c1 41\r
15c952e7 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
c5ecf6c1 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
c5ecf6c1 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