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/** @file
Instance of file explorer Library based on gEfiFileExplorerProtocolGuid.
Implement the file explorer library instance by wrap the interface
provided in the file explorer protocol. This protocol is defined as the internal
protocol related to this implementation, not in the public spec. So, this
library instance is only for this code base.
Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.<BR>
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.
**/
#include <Uefi.h>
#include <Base.h>
#include <Protocol/FileExplorer.h>
#include <Library/FileExplorerLib.h>
#include <Library/BaseLib.h>
#include <Library/DebugLib.h>
EFI_FILE_EXPLORER_PROTOCOL *mProtocol = NULL;
/**
The constructor function caches the pointer to file explorer protocol.
The constructor function locates Print2 protocol from protocol database.
It will ASSERT() if that operation fails and it will always return EFI_SUCCESS.
@param ImageHandle The firmware allocated handle for the EFI image.
@param SystemTable A pointer to the EFI System Table.
@retval EFI_SUCCESS The constructor always returns EFI_SUCCESS.
**/
EFI_STATUS
EFIAPI
FileExplorerConstructor (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
Status = SystemTable->BootServices->LocateProtocol (
&gEfiFileExplorerProtocolGuid,
NULL,
(VOID**) &mProtocol
);
ASSERT_EFI_ERROR (Status);
ASSERT (mProtocol != NULL);
return Status;
}
/**
Choose a file in the specified directory.
If user input NULL for the RootDirectory, will choose file in the system.
If user input *File != NULL, function will return the allocate device path
info for the choosed file, caller has to free the memory after use it.
@param RootDirectory Pointer to the root directory.
@param FileType The file type need to choose.
@param ChooseHandler Function pointer to the extra task need to do
after choose one file.
@param File Return the device path for the last time chosed file.
@retval EFI_SUCESS Choose file success.
@retval EFI_INVALID_PARAMETER Both ChooseHandler and return device path are NULL
One of them must not NULL.
@retval Other errors Choose file failed.
**/
EFI_STATUS
EFIAPI
ChooseFile (
IN EFI_DEVICE_PATH_PROTOCOL *RootDirectory,
IN CHAR16 *FileType, OPTIONAL
IN CHOOSE_HANDLER ChooseHandler, OPTIONAL
OUT EFI_DEVICE_PATH_PROTOCOL **File OPTIONAL
)
{
return mProtocol->ChooseFile (RootDirectory, FileType, ChooseHandler, File);
}
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