/** @file | |
Utility routines used by boot maintenance modules. | |
Copyright (c) 2004 - 2018, Intel Corporation. All rights reserved.<BR> | |
SPDX-License-Identifier: BSD-2-Clause-Patent | |
**/ | |
#include "BootMaintenanceManager.h" | |
/** | |
Function deletes the variable specified by VarName and VarGuid. | |
@param VarName A Null-terminated Unicode string that is | |
the name of the vendor's variable. | |
@param VarGuid A unique identifier for the vendor. | |
@retval EFI_SUCCESS The variable was found and removed | |
@retval EFI_UNSUPPORTED The variable store was inaccessible | |
@retval EFI_NOT_FOUND The variable was not found | |
**/ | |
EFI_STATUS | |
EfiLibDeleteVariable ( | |
IN CHAR16 *VarName, | |
IN EFI_GUID *VarGuid | |
) | |
{ | |
return gRT->SetVariable ( | |
VarName, | |
VarGuid, | |
0, | |
0, | |
NULL | |
); | |
} | |
/** | |
Function is used to determine the number of device path instances | |
that exist in a device path. | |
@param DevicePath A pointer to a device path data structure. | |
@return This function counts and returns the number of device path instances | |
in DevicePath. | |
**/ | |
UINTN | |
EfiDevicePathInstanceCount ( | |
IN EFI_DEVICE_PATH_PROTOCOL *DevicePath | |
) | |
{ | |
UINTN Count; | |
UINTN Size; | |
Count = 0; | |
while (GetNextDevicePathInstance (&DevicePath, &Size) != NULL) { | |
Count += 1; | |
} | |
return Count; | |
} | |
/** | |
Get a string from the Data Hub record based on | |
a device path. | |
@param DevPath The device Path. | |
@return A string located from the Data Hub records based on | |
the device path. | |
@retval NULL If failed to get the String from Data Hub. | |
**/ | |
UINT16 * | |
EfiLibStrFromDatahub ( | |
IN EFI_DEVICE_PATH_PROTOCOL *DevPath | |
) | |
{ | |
return NULL; | |
} |