C# BinaryFormat.SetByte方法代码示例

        /// <summary>
        /// Sets the name of the volume.
        /// </summary>
        /// <param name="volumeName">Name of the volume.</param>
        public void SetVolumeName(string volumeName)
        {
            if (volumeLabel.Length > 8)
                volumeLabel = volumeLabel.Substring(0, 8);

            FatFileLocation location = FindEntry(new Find.Volume(), 0);

            if (!location.Valid)
            {
                location = FindEntry(new Find.Empty(), 0);

                if (!location.Valid)
                    return; // TODO: something went wrong
            }

            BinaryFormat directory = new BinaryFormat(partition.ReadBlock(location.DirectorySector, 1));

            if (volumeName.Length > 8)
                volumeName = volumeName.Substring(0, 8);

            // Create Entry
            directory.SetString(Entry.DOSName + (location.DirectorySectorIndex * Entry.EntrySize), "            ", 11);
            directory.SetString(Entry.DOSName + (location.DirectorySectorIndex * Entry.EntrySize), volumeName);
            directory.SetByte(Entry.FileAttributes + (location.DirectorySectorIndex * Entry.EntrySize), (byte)FatFileAttributes.VolumeLabel);
            directory.SetByte(Entry.Reserved + (location.DirectorySectorIndex * Entry.EntrySize), 0);
            directory.SetByte(Entry.CreationTimeFine + (location.DirectorySectorIndex * Entry.EntrySize), 0);
            directory.SetUShort(Entry.CreationTime + (location.DirectorySectorIndex * Entry.EntrySize), 0);
            directory.SetUShort(Entry.CreationDate + (location.DirectorySectorIndex * Entry.EntrySize), 0);
            directory.SetUShort(Entry.LastAccessDate + (location.DirectorySectorIndex * Entry.EntrySize), 0);
            directory.SetUShort(Entry.LastModifiedTime + (location.DirectorySectorIndex * Entry.EntrySize), 0);
            directory.SetUShort(Entry.LastModifiedDate + (location.DirectorySectorIndex * Entry.EntrySize), 0);
            directory.SetUShort(Entry.FirstCluster + (location.DirectorySectorIndex * Entry.EntrySize), 0);
            directory.SetUInt(Entry.FileSize + (location.DirectorySectorIndex * Entry.EntrySize), 0);

            partition.WriteBlock(location.DirectorySector, 1, directory.Data);
        }

        /// <summary>
        /// Formats the partition with specified fat settings.
        /// </summary>
        /// <param name="fatSettings">The fat settings.</param>
        /// <returns></returns>
        public bool Format(FatSettings fatSettings)
        {
            if (!partition.CanWrite)
                return false;

            this.fatType = fatSettings.FATType;
            bytesPerSector = 512;
            nbrFats = 2;

            totalSectors = partition.BlockCount;
            sectorsPerCluster = GetSectorsPerClusterByTotalSectors(fatType, totalSectors);

            if (sectorsPerCluster == 0)
                return false;

            if (fatType == FatType.FAT32)
            {
                reservedSectors = 32;
                rootEntries = 0;
            }
            else
            {
                reservedSectors = 1;
                rootEntries = 512;
            }

            rootDirSectors = (((rootEntries * 32) + (bytesPerSector - 1)) / bytesPerSector);

            uint val1 = totalSectors - (reservedSectors + rootDirSectors);
            uint val2 = (uint)((sectorsPerCluster * 256) + nbrFats);

            if (fatType == FatType.FAT32)
                val2 = val2 / 2;

            uint sectorsPerFat = (val1 + (val2 - 1)) / val2;

            firstRootDirectorySector = reservedSectors + sectorsPerFat;

            BinaryFormat bootSector = new BinaryFormat(512);

            bootSector.SetUInt(BootSector.JumpInstruction, 0);
            bootSector.SetString(BootSector.EOMName, "MOSA    ");
            bootSector.SetUShort(BootSector.BytesPerSector, (ushort)bytesPerSector);
            bootSector.SetByte(BootSector.SectorsPerCluster, (byte)sectorsPerCluster);
            bootSector.SetUShort(BootSector.ReservedSectors, (ushort)reservedSectors);
            bootSector.SetByte(BootSector.FatAllocationTables, nbrFats);
            bootSector.SetUShort(BootSector.MaxRootDirEntries, (ushort)rootEntries);
            bootSector.SetUShort(BootSector.BootSectorSignature, 0xAA55);

            if (totalSectors > 0xFFFF)
            {
                bootSector.SetUShort(BootSector.TotalSectors16, 0);
                bootSector.SetUInt(BootSector.TotalSectors32, totalSectors);
            }
            else
            {
                bootSector.SetUShort(BootSector.TotalSectors16, (ushort)totalSectors);
                bootSector.SetUInt(BootSector.TotalSectors32, 0);
            }

            if (fatSettings.FloppyMedia)
            {
                // Default is 1.44
                bootSector.SetByte(BootSector.MediaDescriptor, 0xF0); // 0xF0 = 3.5" Double Sided, 80 tracks per side, 18 sectors per track (1.44MB).
            }
            else
                bootSector.SetByte(BootSector.MediaDescriptor, 0xF8); // 0xF8 = Hard disk

            bootSector.SetUShort(BootSector.SectorsPerTrack, fatSettings.SectorsPerTrack);
            bootSector.SetUShort(BootSector.NumberOfHeads, fatSettings.NumberOfHeads);
            bootSector.SetUInt(BootSector.HiddenSectors, fatSettings.HiddenSectors);

            if (fatType != FatType.FAT32)
            {
                bootSector.SetUShort(BootSector.SectorsPerFAT, (ushort)sectorsPerFat);
                if (fatSettings.FloppyMedia)
                    bootSector.SetByte(BootSector.PhysicalDriveNbr, 0x00);
                else
                    bootSector.SetByte(BootSector.PhysicalDriveNbr, 0x80);

                bootSector.SetByte(BootSector.ReservedCurrentHead, 0);
                bootSector.SetByte(BootSector.ExtendedBootSignature, 0x29);
                bootSector.SetBytes(BootSector.IDSerialNumber, fatSettings.SerialID, 0, (uint)Math.Min(4, fatSettings.SerialID.Length));

                if (string.IsNullOrEmpty(fatSettings.VolumeLabel))
                    bootSector.SetString(BootSector.VolumeLabel, "NO NAME    ");
                else
                {
                    bootSector.SetString(BootSector.VolumeLabel, "           ");  // 11 blank spaces
                    bootSector.SetString(BootSector.VolumeLabel, fatSettings.VolumeLabel, (uint)Math.Min(11, fatSettings.VolumeLabel.Length));
                }

                if (fatSettings.OSBootCode != null)
                {
                    if (fatSettings.OSBootCode.Length == 512)
//.........这里部分代码省略.........

        /// <summary>
        /// Deletes the specified file or directory
        /// </summary>
        /// <param name="targetCluster">The target cluster.</param>
        /// <param name="directorySector">The directory sector.</param>
        /// <param name="directorySectorIndex">Index of the directory sector.</param>
        public void Delete(uint targetCluster, uint directorySector, uint directorySectorIndex)
        {
            BinaryFormat entry = new BinaryFormat(partition.ReadBlock(directorySector, 1));

            entry.SetByte(Entry.DOSName + (directorySectorIndex * Entry.EntrySize), (byte)FileNameAttribute.Deleted);

            partition.WriteBlock(directorySector, 1, entry.Data);

            FreeClusterChain(targetCluster);
        }

        /// <summary>
        /// Creates the file.
        /// </summary>
        /// <param name="filename">The filename.</param>
        /// <param name="fileAttributes">The file attributes.</param>
        /// <param name="directoryCluster">The directory cluster.</param>
        /// <returns></returns>
        public FatFileLocation CreateFile(string filename, FatFileAttributes fileAttributes, uint directoryCluster)
        {
            FatFileLocation location = FindEntry(new Find.WithName(filename), directoryCluster);

            if (location.Valid)
            {
                // Truncate the file
                BinaryFormat entry = new BinaryFormat(partition.ReadBlock(location.DirectorySector, 1));

                // Truncate the file length and reset the start cluster
                entry.SetUInt(Entry.FileSize + (location.DirectorySectorIndex * Entry.EntrySize), 0);
                entry.SetUInt(Entry.FirstCluster + (location.DirectorySectorIndex * Entry.EntrySize), 0);

                partition.WriteBlock(location.DirectorySector, 1, entry.Data);

                FreeClusterChain(location.FirstCluster);

                location.FirstCluster = 0;

                return location;
            }

            // Find an empty location in the directory
            location = FindEntry(new Find.Empty(), directoryCluster);

            if (!location.Valid)
            {
                // Extend Directory

                // TODO

                return location;
            }

            BinaryFormat directory = new BinaryFormat(partition.ReadBlock(location.DirectorySector, 1));

            if (filename.Length > 11)
                filename = filename.Substring(0, 11);

            // Create Entry
            directory.SetString(Entry.DOSName + (location.DirectorySectorIndex * Entry.EntrySize), "            ", 11);
            directory.SetString(Entry.DOSName + (location.DirectorySectorIndex * Entry.EntrySize), filename);
            directory.SetByte(Entry.FileAttributes + (location.DirectorySectorIndex * Entry.EntrySize), (byte)fileAttributes);
            directory.SetByte(Entry.Reserved + (location.DirectorySectorIndex * Entry.EntrySize), 0);
            directory.SetByte(Entry.CreationTimeFine + (location.DirectorySectorIndex * Entry.EntrySize), 0);
            directory.SetUShort(Entry.CreationTime + (location.DirectorySectorIndex * Entry.EntrySize), 0);
            directory.SetUShort(Entry.CreationDate + (location.DirectorySectorIndex * Entry.EntrySize), 0);
            directory.SetUShort(Entry.LastAccessDate + (location.DirectorySectorIndex * Entry.EntrySize), 0);
            directory.SetUShort(Entry.LastModifiedTime + (location.DirectorySectorIndex * Entry.EntrySize), 0);
            directory.SetUShort(Entry.LastModifiedDate + (location.DirectorySectorIndex * Entry.EntrySize), 0);
            directory.SetUShort(Entry.FirstCluster + (location.DirectorySectorIndex * Entry.EntrySize), 0);
            directory.SetUInt(Entry.FileSize + (location.DirectorySectorIndex * Entry.EntrySize), 0);

            partition.WriteBlock(location.DirectorySector, 1, directory.Data);

            return location;
        }

        /// <summary>
        /// Identifies the drive.
        /// </summary>
        protected void IdentifyDrive()
        {
            byte drive = (byte)(((deviceHead & 0x10) != 0x10) ? 0 : 1);
            byte d = (byte)('0' + drive + 1);
            BinaryFormat data = new BinaryFormat(bufferData);

            data.Fill(0, 0, 512);

            // fixed drive and over 5Mb/sec
            data.SetUShort(0x00, 0x140);
            // Serial Number
            data.Fill(0x0A * 2, d, 20);
            data.SetByte(0x0A * 2, d);
            // Firmware version
            data.Fill(0x17 * 2, d, 8);
            data.SetChar(0x17 * 2 + 0, '1');
            data.SetChar(0x17 * 2 + 1, '.');
            data.SetChar(0x17 * 2 + 2, '0');
            // Model Number
            data.Fill(0x1B * 2, d, 40);
            data.SetChar(0x17 * 2 + 0, 'D');
            data.SetChar(0x17 * 2 + 1, 'R');
            data.SetChar(0x17 * 2 + 2, 'I');
            data.SetChar(0x17 * 2 + 3, 'V');
            data.SetChar(0x17 * 2 + 4, 'E');
            data.SetByte(0x1B * 2 + 5, d);
            // lba28
            data.SetUInt(0x3C * 2, (uint)(driveFiles[drive].Length / 512));

            commandStatus = (byte)((commandStatus | 0x08) & ~0x80); // Set DRQ (bit 3), clear BUSY (bit 7)

            status = DeviceStatus.IdentifyDrive;
        }

        /// <summary>
        /// Writes the master boot block.
        /// </summary>
        /// <returns></returns>
        public bool Write()
        {
            if (!diskDevice.CanWrite) { return false; }

            BinaryFormat masterboot = new BinaryFormat(new byte[512]);

            masterboot.SetUInt(MBR.DiskSignature, diskSignature);
            masterboot.SetUShort(MBR.MBRSignature, MBRConstant.MBRSignature);

            if (code != null)
                for (uint index = 0; ((index < MBRConstant.CodeAreaSize) && (index < code.Length)); index++)
                    masterboot.SetByte(index, code[index]);

            for (uint index = 0; index < MaxMBRPartitions; index++)
                if (Partitions[index].TotalBlocks != 0) {
                    uint offset = MBR.FirstPartition + (index * 16);
                    masterboot.SetByte(offset + PartitionRecord.Status, (byte)(Partitions[index].Bootable ? 0x80 : 0x00));
                    masterboot.SetByte(offset + PartitionRecord.PartitionType, Partitions[index].PartitionType);
                    masterboot.SetUInt(offset + PartitionRecord.LBA, Partitions[index].StartLBA);
                    masterboot.SetUInt(offset + PartitionRecord.Sectors, Partitions[index].TotalBlocks);

                    DiskGeometry diskGeometry = new DiskGeometry();
                    diskGeometry.GuessGeometry(diskDevice.TotalBlocks);

                    CHS chsStart = new CHS();
                    CHS chsEnd = new CHS();

                    chsStart.SetCHS(diskGeometry, Partitions[index].StartLBA);
                    chsEnd.SetCHS(diskGeometry, Partitions[index].StartLBA + Partitions[index].TotalBlocks - 1);

                    masterboot.SetByte(offset + PartitionRecord.FirstCRS, chsStart.Head);
                    masterboot.SetByte(offset + PartitionRecord.FirstCRS + 1, (byte)((chsStart.Sector & 0x3F) | ((chsStart.Cylinder >> 8) & 0x03)));
                    masterboot.SetByte(offset + PartitionRecord.FirstCRS + 2, (byte)(chsStart.Cylinder & 0xFF));
                    masterboot.SetByte(offset + PartitionRecord.LastCRS, chsEnd.Head);
                    masterboot.SetByte(offset + PartitionRecord.LastCRS + 1, (byte)((chsEnd.Sector & 0x3F) | ((chsEnd.Cylinder >> 8) & 0x03)));
                    masterboot.SetByte(offset + PartitionRecord.LastCRS + 2, (byte)(chsEnd.Cylinder & 0xFF));
                }

            diskDevice.WriteBlock(0, 1, masterboot.Data);

            return true;
        }