mirror of
https://github.com/acidanthera/OpenCorePkg.git
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111 lines
2.7 KiB
C
Executable File
111 lines
2.7 KiB
C
Executable File
/** @file
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Copyright (C) 2019, vit9696. All rights reserved.
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All rights reserved.
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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 <Uefi.h>
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#include <Guid/FileInfo.h>
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#include <Protocol/SimpleFileSystem.h>
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#include <Library/UefiLib.h>
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#include <Library/BaseLib.h>
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#include <Library/BaseMemoryLib.h>
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#include <Library/DebugLib.h>
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#include <Library/DevicePathLib.h>
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#include <Library/MemoryAllocationLib.h>
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#include <Library/UefiBootServicesTableLib.h>
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#include <Library/OcDevicePathLib.h>
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#include <Library/OcFileLib.h>
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#include <Library/OcGuardLib.h>
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VOID *
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ReadFile (
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IN EFI_SIMPLE_FILE_SYSTEM_PROTOCOL *FileSystem,
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IN CONST CHAR16 *FilePath,
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OUT UINTN *FileSize OPTIONAL
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)
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{
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EFI_STATUS Status;
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EFI_FILE_HANDLE Volume;
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EFI_FILE_HANDLE FileHandle;
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EFI_FILE_INFO *FileInfo;
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UINT8 *FileBuffer;
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UINTN FileBufferSize;
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UINTN FileReadSize;
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ASSERT (FileSystem != NULL);
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ASSERT (FilePath != NULL);
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Status = FileSystem->OpenVolume (
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FileSystem,
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&Volume
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);
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if (EFI_ERROR (Status)) {
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return NULL;
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}
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Status = Volume->Open (
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Volume,
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&FileHandle,
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(CHAR16 *) FilePath,
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EFI_FILE_MODE_READ,
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0
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);
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if (EFI_ERROR (Status)) {
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Volume->Close (Volume);
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return NULL;
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}
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FileInfo = GetFileInfo (
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FileHandle,
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&gEfiFileInfoGuid,
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sizeof (EFI_FILE_INFO),
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NULL
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);
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if (FileInfo == NULL
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|| OcOverflowAddUN(FileInfo->FileSize, sizeof (CHAR16), &FileBufferSize)) {
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FileHandle->Close (FileHandle);
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Volume->Close (Volume);
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return NULL;
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}
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FileBuffer = AllocatePool (FileBufferSize);
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if (FileBuffer != NULL) {
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FileReadSize = FileInfo->FileSize;
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Status = FileHandle->Read (
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FileHandle,
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&FileReadSize,
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FileBuffer
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);
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if (!EFI_ERROR (Status) && FileReadSize == FileInfo->FileSize) {
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FileBuffer[FileInfo->FileSize] = 0;
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FileBuffer[FileInfo->FileSize + 1] = 0;
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if (FileSize != NULL) {
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*FileSize = FileInfo->FileSize;
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}
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} else {
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FreePool (FileBuffer);
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FileBuffer = NULL;
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}
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}
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FileHandle->Close (FileHandle);
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Volume->Close (Volume);
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return FileBuffer;
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}
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