MemLibGuid.c File Reference

#include "MemLibInternals.h"

Go to the source code of this file.

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)
BOOLEAN EFIAPI	IsZeroGuid (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 - 2018, Intel Corporation. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent

Definition in file MemLibGuid.c.

Function Documentation

CompareGuid()

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.

Definition at line 73 of file MemLibGuid.c.

CopyGuid()

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	A pointer to the destination GUID.
SourceGuid	A pointer to the source GUID.

Returns

DestinationGuid.

Definition at line 39 of file MemLibGuid.c.

IsZeroGuid()

BOOLEAN EFIAPI IsZeroGuid

(

IN CONST GUID *

Guid

)

Checks if the given GUID is a zero GUID.

This function checks whether the given GUID is a zero GUID. If the GUID is identical to a zero GUID then TRUE is returned. Otherwise, FALSE is returned.

If Guid is NULL, then ASSERT().

Parameters

Guid	The pointer to a 128 bit GUID.

Return values

TRUE	Guid is a zero GUID.
FALSE	Guid is not a zero GUID.

Definition at line 156 of file MemLibGuid.c.

ScanGuid()

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.

Definition at line 115 of file MemLibGuid.c.