Exemple #1
0
        private void RecoverFile(FCB rootNode, int BlockIndex, string systemPath)
        {
            disk.disk[BlockIndex - 1].data = "";
            disk.bitmap[BlockIndex - 1]    = true;

            StreamReader reader = new StreamReader(systemPath + "\\DataBlock_" + Convert.ToString(BlockIndex) + ".dat");

            disk.disk[BlockIndex - 1].type      = Convert.ToInt16(reader.ReadLine());
            disk.disk[BlockIndex - 1].data     += reader.ReadLine();
            disk.disk[BlockIndex - 1].nextBlock = Convert.ToInt16(reader.ReadLine());

            if (disk.disk[BlockIndex - 1].nextBlock != -1)
            {
                RecoverFile(rootNode, disk.disk[BlockIndex - 1].nextBlock, systemPath);
            }
        }
Exemple #2
0
        public void RemoveFCB(FCB targetFolder)
        {
            if (targetFolder == null)
            {
                return;
            }
            disk[targetFolder.blockPosID - 1].FCBList.Remove(targetFolder);

            //如果此时该disk内PCBList已空
            //就完全初始化
            if (disk[targetFolder.blockPosID - 1].FCBList.Count() == 0)
            {
                disk[targetFolder.blockPosID - 1].FCBList = null;
                disk[targetFolder.blockPosID - 1].type    = -1;
                bitmap[targetFolder.blockPosID - 1]       = false;
            }
        }
Exemple #3
0
        private void NewFile_Button_Click(object sender, RoutedEventArgs e)
        {
            FileAdd fileAddWindow = new FileAdd();

            fileAddWindow.ShowDialog();

            string name = fileAddWindow._newFileName;

            //窗体直接关闭
            if (name == null)
            {
                return;
            }

            //命名含有非法字符检测
            if (name.Contains(" ") || name == "")
            {
                System.Windows.MessageBox.Show("含有非法字符");
                return;
            }

            //重名检测
            if (FindFCBName(name) != null)
            {
                System.Windows.MessageBox.Show("“" + name + "”已存在");
                return;
            }

            string newFileName    = fileAddWindow._newFileName;
            string newFileContent = fileAddWindow._newFileContent;
            int    size           = newFileContent.Count() / BLOCK_CONTENT_LENGTH + 1;

            FCB newFile = new FCB(Type.File, newFileName, size, ++FCBID);

            newFile.father = currentDirectory;
            currentDirectory.fileSon.Add(newFile);
            UpdateAncestorSize(newFile, size);

            disk.AddNewFCB(newFile);
            disk.AddNewFileContent(newFile, newFileContent);

            UpdateCurrentDir();
            UpdateFCBList();
        }
Exemple #4
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        public string ExtractFileContent(FCB targetFile)
        {
            string wholeContent = "";

            int currentBlockID = targetFile.beginBlockID;

            while (true)
            {
                wholeContent += disk[currentBlockID - 1].data;

                if (disk[currentBlockID - 1].nextBlock == -1)
                {
                    break;
                }
                else
                {
                    currentBlockID = disk[currentBlockID - 1].nextBlock;
                }
            }
            return(wholeContent);
        }
Exemple #5
0
        private void FCBList_MouseDoubleClick(object sender, MouseButtonEventArgs e)
        {
            //无选中项目
            if (FCBList.SelectedItem == null)
            {
                return;
            }

            string targetName = FCBList.SelectedItem.ToString();

            for (int i = 0; i < currentDirectory.folderSon.Count(); i++)
            {
                if (currentDirectory.folderSon[i].name == targetName)
                {
                    currentDirectory = currentDirectory.folderSon[i];
                    UpdateCurrentDir();
                    UpdateFCBList();

                    break;
                }
            }

            for (int i = 0; i < currentDirectory.fileSon.Count(); i++)
            {
                if (currentDirectory.fileSon[i].name == targetName)
                {
                    int beforeSize = currentDirectory.fileSon[i].size;

                    FileShow fileShow = new FileShow(disk, currentDirectory.fileSon[i]);
                    fileShow.ShowDialog();

                    int afterSize = currentDirectory.fileSon[i].size;

                    UpdateAncestorSize(currentDirectory.fileSon[i], afterSize - beforeSize);

                    UpdateCurrentDir();
                    break;
                }
            }
        }
Exemple #6
0
        private void NewFolder_Button_Click(object sender, RoutedEventArgs e)
        {
            FolderAdd folderAddWindow = new FolderAdd();

            folderAddWindow.ShowDialog();

            string name = folderAddWindow._newFolderName;

            //窗口直接关闭的情况
            if (name == null)
            {
                return;
            }

            //命名含有非法字符检测
            if (name.Contains(" ") || name == "")
            {
                System.Windows.MessageBox.Show("含有非法字符");
                return;
            }

            //重名检测
            if (FindFCBName(name) != null)
            {
                System.Windows.MessageBox.Show("“" + name + "”已存在");
                return;
            }

            string newFolderName = folderAddWindow._newFolderName;
            FCB    newFolder     = new FCB(Type.Folder, newFolderName, 1, ++FCBID);

            newFolder.father = currentDirectory;
            currentDirectory.folderSon.Add(newFolder);
            UpdateAncestorSize(newFolder, newFolder.size);

            disk.AddNewFCB(newFolder);

            UpdateCurrentDir();
            UpdateFCBList();
        }
Exemple #7
0
        private FCB Recursion_Serach_Folder(FCB rootNode, int targetID)
        {
            if (rootNode.ID == targetID)
            {
                return(rootNode);
            }

            for (int i = 0; i < rootNode.folderSon.Count(); i++)
            {
                FCB currentNode = Recursion_Serach_Folder(rootNode.folderSon[i], targetID);

                if (currentNode == null)
                {
                    continue;
                }
                if (currentNode.ID == targetID)
                {
                    return(currentNode);
                }
            }

            return(null);
        }
Exemple #8
0
        public void AddNewFCB(FCB newFolder)
        {
            int posID = FindFreeBlock(1);

            if (posID == -1)
            {
                System.Windows.MessageBox.Show("文件系统已满!");
                return;
            }

            bitmap[posID - 1]    = true;                //更新位图
            disk[posID - 1].type = 1;

            newFolder.blockPosID = posID;

            //新Block鉴定
            if (disk[posID - 1].FCBList == null)
            {
                disk[posID - 1].FCBList = new List <FCB>();
            }

            disk[posID - 1].FCBList.Add(newFolder);     //更新disk
        }
Exemple #9
0
        private void SaveAndExit_Button_Click(object sender, RoutedEventArgs e)
        {
            string systemPath = "";
            FolderBrowserDialog folderBrowser = new FolderBrowserDialog();

            folderBrowser.RootFolder = Environment.SpecialFolder.Desktop;

            if (folderBrowser.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {
                systemPath = folderBrowser.SelectedPath;
            }
            else if (folderBrowser.ShowDialog() == System.Windows.Forms.DialogResult.Cancel)
            {
                return;
            }

            //清空当前文件夹
            SystemFolderClear(systemPath);

            //新建文件流指针
            StreamWriter writer;

            writer = new StreamWriter(systemPath + "\\BlockNum.dat", false);
            writer.WriteLine(Convert.ToString(blockNum), false);
            writer.Close();

            for (int i = 0; i < blockNum; i++)
            {
                Block currentBlock = disk.disk[i];

                //因为type为-1的Block没有存储任何信息可以直接还原
                //所以不对其做存储操作
                if (currentBlock.type == -1)
                {
                }

                //将所有type为1的Block存储在单个文件内
                //以保证目录树的完整还原
                else if (currentBlock.type == 1)
                {
                    writer = new StreamWriter(systemPath + "\\FCBBlock.dat", true);

                    for (int j = 0; j < currentBlock.FCBList.Count(); j++)
                    {
                        FCB currentFCB = disk.disk[i].FCBList[j];

                        //文件型FCB
                        if (currentFCB.type == Type.File)
                        {
                            writer.WriteLine(currentFCB.ID + " " + 2 + " " + currentFCB.name + " " + currentFCB.size + " " +
                                             currentFCB.blockPosID + " " + currentFCB.beginBlockID + " " + currentFCB.endBlockID + " ");
                        }
                        //文件夹型FCB
                        else if (currentFCB.type == Type.Folder)
                        {
                            writer.Write(currentFCB.ID + " " + 1 + " " + currentFCB.name + " " +
                                         currentFCB.size + " " + currentFCB.blockPosID + " ");

                            writer.Write("(");
                            for (int k = 0; k < currentFCB.folderSon.Count(); k++)
                            {
                                writer.Write(currentFCB.folderSon[k].ID + " ");
                            }
                            writer.Write(")");

                            writer.Write("(");
                            for (int k = 0; k < currentFCB.fileSon.Count(); k++)
                            {
                                writer.Write(currentFCB.fileSon[k].ID + " ");
                            }
                            writer.Write(") ");

                            writer.WriteLine("");
                        }
                    }
                    writer.Close();
                }

                //将所有type为2的Block存储在不同文件中
                else if (currentBlock.type == 2)
                {
                    writer = new StreamWriter(systemPath + "\\DataBlock_" + Convert.ToString(currentBlock.ID) + ".dat", false);

                    writer.WriteLine(currentBlock.type);
                    //writer.WriteLine(currentBlock.ID); //不需要
                    writer.WriteLine(currentBlock.data);
                    writer.WriteLine(currentBlock.nextBlock);

                    writer.Close();
                }
            }
            this.Close();
        }
Exemple #10
0
 //根据路径名找到FCBBLock.dat 文件
 //根据文件复原加载系统的FCB tree
 private void SystemRecover(string systemPath)
 {
     rootFolder = new FCB(Type.Folder, "root", ++FCBID);
     //basic Information Recover
     RecoverTree(rootFolder, 1, null, systemPath);
 }
Exemple #11
0
        private void RecoverTree(FCB rootNode, int FCBID, FCB father, string systemPath)
        {
            string fullSystemPath = systemPath + "\\FCBBlock.dat";

            rootNode.father    = father;
            rootNode.fileSon   = new List <FCB>();
            rootNode.folderSon = new List <FCB>();

            StreamReader reader     = new StreamReader(fullSystemPath);
            string       singleLine = reader.ReadLine();

            while (Convert.ToInt16(singleLine.Substring(0, singleLine.IndexOf(" ") + 1)) != FCBID)
            {
                singleLine = reader.ReadLine();
            }

            rootNode.ID = Convert.ToInt16(singleLine.Substring(0, singleLine.IndexOf(" ")));
            singleLine  = singleLine.Remove(0, singleLine.IndexOf(" ") + 1);

            rootNode.type = (Type)Convert.ToInt16(singleLine.Substring(0, singleLine.IndexOf(" ")));          ///////////////////problem
            singleLine    = singleLine.Remove(0, singleLine.IndexOf(" ") + 1);

            rootNode.name = singleLine.Substring(0, singleLine.IndexOf(" "));
            singleLine    = singleLine.Remove(0, singleLine.IndexOf(" ") + 1);

            rootNode.size = Convert.ToInt16(singleLine.Substring(0, singleLine.IndexOf(" ")));
            singleLine    = singleLine.Remove(0, singleLine.IndexOf(" ") + 1);

            rootNode.blockPosID = Convert.ToInt16(singleLine.Substring(0, singleLine.IndexOf(" ")));
            singleLine          = singleLine.Remove(0, singleLine.IndexOf(" ") + 1);

            //更新disk 的type
            disk.disk[rootNode.blockPosID - 1].type = 1;
            //更新disk 内Block的FCBList
            if (disk.disk[rootNode.blockPosID - 1].FCBList == null)
            {
                disk.disk[rootNode.blockPosID - 1].FCBList = new List <FCB>();
            }
            disk.disk[rootNode.blockPosID - 1].FCBList.Add(rootNode);
            //更新位图
            disk.bitmap[rootNode.blockPosID - 1] = true;

            if (rootNode.type == Type.File)
            {
                //父节点添加该节点指针
                father.fileSon.Add(rootNode);

                rootNode.beginBlockID = Convert.ToInt16(singleLine.Substring(0, singleLine.IndexOf(" ")));
                singleLine            = singleLine.Remove(0, singleLine.IndexOf(" ") + 1);

                rootNode.endBlockID = Convert.ToInt16(singleLine.Substring(0, singleLine.IndexOf(" ")));
                singleLine          = singleLine.Remove(0, singleLine.IndexOf(" ") + 1);

                RecoverFile(rootNode, rootNode.beginBlockID, systemPath);
            }
            else if (rootNode.type == Type.Folder)
            {
                //父节点添加该节点指针
                if (father != null)
                {
                    father.folderSon.Add(rootNode);
                }

                //提取子文件夹FCB 的索引
                List <int> folderSonIndex = new List <int>();

                singleLine = singleLine.Remove(0, singleLine.IndexOf("(") + 1);
                while (!singleLine.Substring(0, 1).Equals(")"))
                {
                    folderSonIndex.Add(Convert.ToInt16(singleLine.Substring(0, singleLine.IndexOf(" "))));
                    singleLine = singleLine.Remove(0, singleLine.IndexOf(" ") + 1);
                }
                singleLine = singleLine.Remove(0, 1);
                //递归添加子节点
                for (int i = 0; i < folderSonIndex.Count(); i++)
                {
                    FCB newFolder = new FCB(Type.Folder, null, 1, folderSonIndex[i]);
                    RecoverTree(newFolder, folderSonIndex[i], rootNode, systemPath);
                }

                //提取子文件FCB 的索引
                List <int> fileSonIndex = new List <int>();

                singleLine = singleLine.Remove(0, singleLine.IndexOf("(") + 1);
                while (!singleLine.Substring(0, 1).Equals(")"))
                {
                    fileSonIndex.Add(Convert.ToInt16(singleLine.Substring(0, singleLine.IndexOf(" "))));
                    singleLine = singleLine.Remove(0, singleLine.IndexOf(" ") + 1);
                }
                singleLine = singleLine.Remove(0, 1);

                //根据Index 恢复该FCB的文件子集
                for (int i = 0; i < fileSonIndex.Count(); i++)
                {
                    FCB newFile = new FCB(Type.File, null, 1, fileSonIndex[i]);
                    RecoverTree(newFile, fileSonIndex[i], rootNode, systemPath);
                }
            }
            return;
        }