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Diffstat (limited to 'EDK/Foundation/Library/EdkIIGlueLib/Library/BaseMemoryLib/ScanMem64Wrapper.c')
-rw-r--r-- | EDK/Foundation/Library/EdkIIGlueLib/Library/BaseMemoryLib/ScanMem64Wrapper.c | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/EDK/Foundation/Library/EdkIIGlueLib/Library/BaseMemoryLib/ScanMem64Wrapper.c b/EDK/Foundation/Library/EdkIIGlueLib/Library/BaseMemoryLib/ScanMem64Wrapper.c new file mode 100644 index 0000000..c7b39f5 --- /dev/null +++ b/EDK/Foundation/Library/EdkIIGlueLib/Library/BaseMemoryLib/ScanMem64Wrapper.c @@ -0,0 +1,62 @@ +/*++ + +Copyright (c) 2004 - 2006, Intel Corporation +All rights reserved. This program and the accompanying materials +are licensed and made available under the terms and conditions of the BSD License +which accompanies this distribution. The full text of the license may be found at +http://opensource.org/licenses/bsd-license.php + +THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, +WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. + +Module Name: + + ScanMem64Wrapper.c + +Abstract: + + ScanMem64() implementation. + +--*/ + +#include "BaseMemoryLibInternal.h" + +/** + Scans a target buffer for a 64-bit value, and returns a pointer to the matching 64-bit value + in the target buffer. + + This function searches target the buffer specified by Buffer and Length from the lowest + address to the highest address for a 64-bit value that matches Value. If a match is found, + then a pointer to the matching byte in the target buffer is returned. If no match is found, + then NULL is returned. If Length is 0, then NULL is returned. + If Length > 0 and Buffer is NULL, then ASSERT(). + If Buffer is not aligned on a 64-bit boundary, then ASSERT(). + If Length is not aligned on a 64-bit boundary, then ASSERT(). + If Length is greater than (MAX_ADDRESS ?Buffer + 1), then ASSERT(). + + @param Buffer Pointer to the target buffer to scan. + @param Length Number of bytes in Buffer to scan. + @param Value Value to search for in the target buffer. + + @return A pointer to the matching byte in the target buffer or NULL otherwise. + +**/ +VOID * +EFIAPI +ScanMem64 ( + IN CONST VOID *Buffer, + IN UINTN Length, + IN UINT64 Value + ) +{ + if (Length == 0) { + return NULL; + } + + ASSERT (Buffer != NULL); + ASSERT (((UINTN)Buffer & (sizeof (Value) - 1)) == 0); + ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)Buffer)); + ASSERT ((Length & (sizeof (Value) - 1)) == 0); + + return (VOID*)InternalMemScanMem64 (Buffer, Length / sizeof (Value), Value); +} |