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608fd3fd 1/** @file\r
2 ScanMem32() 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: ScanMem32Wrapper.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 32-bit value, and returns a pointer to the matching 32-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 32-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 32-bit boundary, then ASSERT().\r
add13dc2 38 If Length is not aligned on a 32-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
48VOID *\r
49EFIAPI\r
50ScanMem32 (\r
24e25d11 51 IN CONST VOID *Buffer,\r
52 IN UINTN Length,\r
53 IN UINT32 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*)InternalMemScanMem32 (Buffer, Length / sizeof (Value), Value);\r
608fd3fd 66}\r