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https://github.com/CloverHackyColor/CloverBootloader.git
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410 lines
10 KiB
C
410 lines
10 KiB
C
/** @file
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Functions to deal with file buffer.
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Copyright (c) 2005 - 2018, 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 "HexEditor.h"
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extern EFI_HANDLE HImageHandleBackup;
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extern HEFI_EDITOR_BUFFER_IMAGE HBufferImage;
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extern BOOLEAN HBufferImageNeedRefresh;
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extern BOOLEAN HBufferImageOnlyLineNeedRefresh;
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extern BOOLEAN HBufferImageMouseNeedRefresh;
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extern HEFI_EDITOR_GLOBAL_EDITOR HMainEditor;
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HEFI_EDITOR_FILE_IMAGE HFileImage;
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HEFI_EDITOR_FILE_IMAGE HFileImageBackupVar;
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//
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// for basic initialization of HFileImage
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//
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HEFI_EDITOR_BUFFER_IMAGE HFileImageConst = {
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NULL,
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NULL,
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0,
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NULL,
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{0},
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{0},
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{0},
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0,
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0,
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0,
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0,
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NULL ,
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NULL,
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NULL
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};
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/**
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Initialization function for HFileImage
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@retval EFI_SUCCESS The operation was successful.
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**/
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EFI_STATUS
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HFileImageInit (
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VOID
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)
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{
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//
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// basically initialize the HFileImage
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//
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CopyMem (&HFileImage, &HFileImageConst, sizeof (HFileImage));
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CopyMem (
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&HFileImageBackupVar,
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&HFileImageConst,
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sizeof (HFileImageBackupVar)
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);
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return EFI_SUCCESS;
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}
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/**
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Backup function for HFileImage. Only a few fields need to be backup.
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This is for making the file buffer refresh as few as possible.
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@retval EFI_SUCCESS The operation was successful.
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@retval EFI_OUT_OF_RESOURCES A memory allocation failed.
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**/
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EFI_STATUS
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HFileImageBackup (
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VOID
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)
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{
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SHELL_FREE_NON_NULL (HFileImageBackupVar.FileName);
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HFileImageBackupVar.FileName = CatSPrint(NULL, L"%s", HFileImage.FileName);
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if (HFileImageBackupVar.FileName == NULL) {
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return EFI_OUT_OF_RESOURCES;
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}
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return EFI_SUCCESS;
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}
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/**
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Cleanup function for HFileImage.
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@retval EFI_SUCCESS The operation was successful.
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**/
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EFI_STATUS
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HFileImageCleanup (
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VOID
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)
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{
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SHELL_FREE_NON_NULL (HFileImage.FileName);
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SHELL_FREE_NON_NULL (HFileImageBackupVar.FileName);
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return EFI_SUCCESS;
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}
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/**
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Set FileName field in HFileImage
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@param[in] Str File name to set.
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@retval EFI_SUCCESS The operation was successful.
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@retval EFI_OUT_OF_RESOURCES A memory allocation failed.
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**/
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EFI_STATUS
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HFileImageSetFileName (
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IN CONST CHAR16 *Str
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)
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{
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if (Str == HFileImage.FileName) {
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//
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// This function might be called using HFileImage.FileName as Str.
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// Directly return without updating HFileImage.FileName.
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//
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return EFI_SUCCESS;
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}
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//
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// free the old file name
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//
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SHELL_FREE_NON_NULL (HFileImage.FileName);
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HFileImage.FileName = AllocateCopyPool (StrSize (Str), Str);
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if (HFileImage.FileName == NULL) {
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return EFI_OUT_OF_RESOURCES;
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}
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return EFI_SUCCESS;
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}
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/**
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Read a file from disk into HBufferImage.
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@param[in] FileName filename to read.
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@param[in] Recover if is for recover, no information print.
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@retval EFI_SUCCESS The operation was successful.
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@retval EFI_OUT_OF_RESOURCES A memory allocation failed.
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@retval EFI_LOAD_ERROR A load error occured.
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**/
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EFI_STATUS
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HFileImageRead (
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IN CONST CHAR16 *FileName,
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IN BOOLEAN Recover
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)
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{
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HEFI_EDITOR_LINE *Line;
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UINT8 *Buffer;
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CHAR16 *UnicodeBuffer;
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EFI_STATUS Status;
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//
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// variable initialization
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//
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Line = NULL;
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//
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// in this function, when you return error ( except EFI_OUT_OF_RESOURCES )
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// you should set status string
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// since this function maybe called before the editorhandleinput loop
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// so any error will cause editor return
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// so if you want to print the error status
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// you should set the status string
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//
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Status = ReadFileIntoBuffer (FileName, (VOID**)&Buffer, &HFileImage.Size, &HFileImage.ReadOnly);
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//
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// NULL pointer is only also a failure for a non-zero file size.
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//
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if ((EFI_ERROR(Status)) || (Buffer == NULL && HFileImage.Size != 0)) {
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UnicodeBuffer = CatSPrint(NULL, L"Read error on file %s: %r", FileName, Status);
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if (UnicodeBuffer == NULL) {
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SHELL_FREE_NON_NULL(Buffer);
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return EFI_OUT_OF_RESOURCES;
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}
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StatusBarSetStatusString (UnicodeBuffer);
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FreePool (UnicodeBuffer);
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return EFI_OUT_OF_RESOURCES;
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}
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HFileImageSetFileName (FileName);
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//
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// free the old lines
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//
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HBufferImageFree ();
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Status = HBufferImageBufferToList (Buffer, HFileImage.Size);
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SHELL_FREE_NON_NULL (Buffer);
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if (EFI_ERROR (Status)) {
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StatusBarSetStatusString (L"Error parsing file.");
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return Status;
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}
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HBufferImage.DisplayPosition.Row = 2;
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HBufferImage.DisplayPosition.Column = 10;
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HBufferImage.MousePosition.Row = 2;
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HBufferImage.MousePosition.Column = 10;
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HBufferImage.LowVisibleRow = 1;
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HBufferImage.HighBits = TRUE;
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HBufferImage.BufferPosition.Row = 1;
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HBufferImage.BufferPosition.Column = 1;
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HBufferImage.BufferType = FileTypeFileBuffer;
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if (!Recover) {
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UnicodeBuffer = CatSPrint(NULL, L"%d Lines Read", HBufferImage.NumLines);
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if (UnicodeBuffer == NULL) {
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SHELL_FREE_NON_NULL(Buffer);
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return EFI_OUT_OF_RESOURCES;
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}
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StatusBarSetStatusString (UnicodeBuffer);
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FreePool (UnicodeBuffer);
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HMainEditor.SelectStart = 0;
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HMainEditor.SelectEnd = 0;
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}
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//
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// has line
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//
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if (HBufferImage.Lines != 0) {
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HBufferImage.CurrentLine = CR (HBufferImage.ListHead->ForwardLink, HEFI_EDITOR_LINE, Link, EFI_EDITOR_LINE_LIST);
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} else {
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//
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// create a dummy line
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//
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Line = HBufferImageCreateLine ();
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if (Line == NULL) {
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SHELL_FREE_NON_NULL(Buffer);
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return EFI_OUT_OF_RESOURCES;
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}
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HBufferImage.CurrentLine = Line;
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}
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HBufferImage.Modified = FALSE;
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HBufferImageNeedRefresh = TRUE;
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HBufferImageOnlyLineNeedRefresh = FALSE;
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HBufferImageMouseNeedRefresh = TRUE;
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return EFI_SUCCESS;
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}
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/**
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Save lines in HBufferImage to disk.
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@param[in] FileName The file name.
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@retval EFI_SUCCESS The operation was successful.
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@retval EFI_OUT_OF_RESOURCES A memory allocation failed.
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@retval EFI_LOAD_ERROR A load error occured.
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**/
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EFI_STATUS
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HFileImageSave (
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IN CHAR16 *FileName
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)
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{
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LIST_ENTRY *Link;
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HEFI_EDITOR_LINE *Line;
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CHAR16 *Str;
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EFI_STATUS Status;
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UINTN NumLines;
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SHELL_FILE_HANDLE FileHandle;
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UINTN TotalSize;
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UINT8 *Buffer;
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UINT8 *Ptr;
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EDIT_FILE_TYPE BufferTypeBackup;
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BufferTypeBackup = HBufferImage.BufferType;
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HBufferImage.BufferType = FileTypeFileBuffer;
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//
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// if is the old file
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//
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if (HFileImage.FileName != NULL && FileName != NULL && StrCmp (FileName, HFileImage.FileName) == 0) {
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//
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// check whether file exists on disk
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//
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if (ShellIsFile(FileName) == EFI_SUCCESS) {
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//
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// current file exists on disk
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// so if not modified, then not save
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//
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if (HBufferImage.Modified == FALSE) {
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return EFI_SUCCESS;
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}
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//
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// if file is read-only, set error
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//
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if (HFileImage.ReadOnly == TRUE) {
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StatusBarSetStatusString (L"Read Only File Can Not Be Saved");
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return EFI_SUCCESS;
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}
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}
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}
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if (ShellIsDirectory(FileName) == EFI_SUCCESS) {
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StatusBarSetStatusString (L"Directory Can Not Be Saved");
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return EFI_LOAD_ERROR;
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}
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Status = ShellOpenFileByName (FileName, &FileHandle, EFI_FILE_MODE_READ|EFI_FILE_MODE_WRITE, 0);
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if (!EFI_ERROR (Status)) {
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//
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// the file exits, delete it
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//
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Status = ShellDeleteFile (&FileHandle);
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if (EFI_ERROR (Status) || Status == EFI_WARN_DELETE_FAILURE) {
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StatusBarSetStatusString (L"Write File Failed");
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return EFI_LOAD_ERROR;
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}
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}
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//
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// write all the lines back to disk
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//
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NumLines = 0;
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TotalSize = 0;
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for (Link = HBufferImage.ListHead->ForwardLink; Link != HBufferImage.ListHead; Link = Link->ForwardLink) {
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Line = CR (Link, HEFI_EDITOR_LINE, Link, EFI_EDITOR_LINE_LIST);
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if (Line->Size != 0) {
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TotalSize += Line->Size;
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}
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//
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// end of if Line -> Size != 0
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//
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NumLines++;
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}
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//
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// end of for Link
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//
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Buffer = AllocateZeroPool (TotalSize);
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if (Buffer == NULL) {
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return EFI_OUT_OF_RESOURCES;
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}
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Ptr = Buffer;
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for (Link = HBufferImage.ListHead->ForwardLink; Link != HBufferImage.ListHead; Link = Link->ForwardLink) {
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Line = CR (Link, HEFI_EDITOR_LINE, Link, EFI_EDITOR_LINE_LIST);
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if (Line->Size != 0) {
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CopyMem (Ptr, Line->Buffer, Line->Size);
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Ptr += Line->Size;
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}
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//
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// end of if Line -> Size != 0
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//
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}
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Status = ShellOpenFileByName (FileName, &FileHandle, EFI_FILE_MODE_READ|EFI_FILE_MODE_WRITE|EFI_FILE_MODE_CREATE, 0);
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if (EFI_ERROR (Status)) {
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StatusBarSetStatusString (L"Create File Failed");
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return EFI_LOAD_ERROR;
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}
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Status = ShellWriteFile (FileHandle, &TotalSize, Buffer);
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FreePool (Buffer);
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if (EFI_ERROR (Status)) {
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ShellDeleteFile (&FileHandle);
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return EFI_LOAD_ERROR;
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}
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ShellCloseFile(&FileHandle);
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HBufferImage.Modified = FALSE;
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//
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// set status string
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//
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Str = CatSPrint(NULL, L"%d Lines Wrote", NumLines);
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StatusBarSetStatusString (Str);
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FreePool (Str);
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//
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// now everything is ready , you can set the new file name to filebuffer
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//
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if ((BufferTypeBackup != FileTypeFileBuffer && FileName != NULL) ||
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(FileName != NULL && HFileImage.FileName != NULL && StringNoCaseCompare (&FileName, &HFileImage.FileName) != 0)){
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//
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// not the same
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//
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HFileImageSetFileName (FileName);
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if (HFileImage.FileName == NULL) {
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return EFI_OUT_OF_RESOURCES;
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}
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}
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HFileImage.ReadOnly = FALSE;
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return EFI_SUCCESS;
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}
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