MdePkg/Library/BaseMemoryLibMmx/MemLibGuid.c File Reference


Functions

GUID *EFIAPI CopyGuid (OUT GUID *DestinationGuid, IN CONST GUID *SourceGuid)
BOOLEAN EFIAPI CompareGuid (IN CONST GUID *Guid1, IN CONST GUID *Guid2)
VOID *EFIAPI ScanGuid (IN CONST VOID *Buffer, IN UINTN Length, IN CONST GUID *Guid)

Detailed Description

Implementation of GUID functions.

The following BaseMemoryLib instances contain the same copy of this file:

BaseMemoryLib BaseMemoryLibMmx BaseMemoryLibSse2 BaseMemoryLibRepStr BaseMemoryLibOptDxe BaseMemoryLibOptPei PeiMemoryLib UefiMemoryLib

Copyright (c) 2006 - 2010, 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.


Function Documentation

BOOLEAN EFIAPI CompareGuid ( IN CONST GUID Guid1,
IN CONST GUID Guid2 
)

Compares two GUIDs.

This function compares Guid1 to Guid2. If the GUIDs are identical then TRUE is returned. If there are any bit differences in the two GUIDs, then FALSE is returned.

If Guid1 is NULL, then ASSERT(). If Guid2 is NULL, then ASSERT().

Parameters:
Guid1 A pointer to a 128 bit GUID.
Guid2 A pointer to a 128 bit GUID.
Return values:
TRUE Guid1 and Guid2 are identical.
FALSE Guid1 and Guid2 are not identical.

References CONST, and ReadUnaligned64().

GUID* EFIAPI CopyGuid ( OUT GUID DestinationGuid,
IN CONST GUID SourceGuid 
)

Copies a source GUID to a destination GUID.

This function copies the contents of the 128-bit GUID specified by SourceGuid to DestinationGuid, and returns DestinationGuid.

If DestinationGuid is NULL, then ASSERT(). If SourceGuid is NULL, then ASSERT().

Parameters:
DestinationGuid The pointer to the destination GUID.
SourceGuid The pointer to the source GUID.
Returns:
DestinationGuid.

References CONST, ReadUnaligned64(), and WriteUnaligned64().

VOID* EFIAPI ScanGuid ( IN CONST VOID *  Buffer,
IN UINTN  Length,
IN CONST GUID Guid 
)

Scans a target buffer for a GUID, and returns a pointer to the matching GUID in the target buffer.

This function searches the target buffer specified by Buffer and Length from the lowest address to the highest address at 128-bit increments for the 128-bit GUID value that matches Guid. If a match is found, then a pointer to the matching GUID 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 32-bit boundary, then ASSERT(). If Length is not aligned on a 128-bit boundary, then ASSERT(). If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().

Parameters:
Buffer The pointer to the target buffer to scan.
Length The number of bytes in Buffer to scan.
Guid The value to search for in the target buffer.
Returns:
A pointer to the matching Guid in the target buffer or NULL otherwise.

References ASSERT, CompareGuid(), CONST, MAX_ADDRESS, NULL, and VOID.


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