mirror of https://github.com/acidanthera/audk.git
90 lines
2.2 KiB
C
90 lines
2.2 KiB
C
/** @file
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Utility routines used by boot maintenance modules.
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Copyright (c) 2004 - 2015, Intel Corporation. All rights reserved.<BR>
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include "BootMaintenanceManager.h"
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/**
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Function deletes the variable specified by VarName and VarGuid.
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@param VarName A Null-terminated Unicode string that is
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the name of the vendor's variable.
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@param VarGuid A unique identifier for the vendor.
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@retval EFI_SUCCESS The variable was found and removed
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@retval EFI_UNSUPPORTED The variable store was inaccessible
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@retval EFI_NOT_FOUND The variable was not found
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**/
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EFI_STATUS
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EfiLibDeleteVariable (
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IN CHAR16 *VarName,
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IN EFI_GUID *VarGuid
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)
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{
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return gRT->SetVariable (
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VarName,
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VarGuid,
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0,
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0,
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NULL
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);
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}
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/**
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Function is used to determine the number of device path instances
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that exist in a device path.
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@param DevicePath A pointer to a device path data structure.
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@return This function counts and returns the number of device path instances
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in DevicePath.
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**/
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UINTN
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EfiDevicePathInstanceCount (
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IN EFI_DEVICE_PATH_PROTOCOL *DevicePath
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)
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{
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UINTN Count;
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UINTN Size;
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Count = 0;
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while (GetNextDevicePathInstance (&DevicePath, &Size) != NULL) {
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Count += 1;
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}
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return Count;
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}
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/**
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Get a string from the Data Hub record based on
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a device path.
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@param DevPath The device Path.
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@return A string located from the Data Hub records based on
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the device path.
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@retval NULL If failed to get the String from Data Hub.
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**/
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UINT16 *
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EfiLibStrFromDatahub (
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IN EFI_DEVICE_PATH_PROTOCOL *DevPath
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)
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{
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return NULL;
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}
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