public static void RestoreAs7ZipArchiveHelper(ImageReader openedReader, MetaRecord record, string targetFilename)
{
try
{
openedReader.Extract(record, targetFilename);
}
catch (Exception exc)
{
MessageBox.Show(exc.Message, string.Empty, MessageBoxButtons.OK, MessageBoxIcon.Error, MessageBoxDefaultButton.Button1, 0);
}
}
/// <summary>
/// Searches for the anteposition of file
/// </summary>
/// <param name="record">record to search</param>
/// <returns>anteposition</returns>
/// <exception cref="InvalidOperationException">record not found</exception>
public Int64 GetDisplacementOfPackedFile(MetaRecord record)
{
Int64 displacement = 0;
foreach (MetaRecord recordIn in _records)
{
if (recordIn == record)
{
return(displacement);
}
displacement += recordIn.SizeOfData;
}
throw new InvalidOperationException("Not found");
}
public void Extract(MetaRecord record, string destinationFileName)
{
if (File.Exists(destinationFileName))
{
File.Delete(destinationFileName);
}
Int64 displacement = _dataStartPos + _metadata.GetDisplacementOfPackedFile(record);
using (FileStream fs = File.OpenRead(FileName))
{
fs.Seek(displacement, SeekOrigin.Begin);
using (BinaryReader reader = new BinaryReader(fs))
{
using (BinaryWriter writer = new BinaryWriter(File.OpenWrite(destinationFileName)))
{
byte[] buffer = new byte[1];
Int64 sizeToRead = record.SizeOfData;
while (sizeToRead > 0)
{
if (buffer.Length == 0)
{
throw new InvalidDataException(_INVALIDIMAGE);
}
if (sizeToRead >= _BUFFERLENGTH)
{
buffer = reader.ReadBytes(_BUFFERLENGTH);
}
else
{
buffer = reader.ReadBytes((int)sizeToRead);
}
writer.Write(buffer);
sizeToRead -= buffer.Length;
}
}
}
}
}
/// <summary>
/// Loads metadata from an array
/// </summary>
/// <param name="bytes">Array of bytes</param>
public void FromByteArray(byte[] array)
{
int recordsAmount = BitConverter.ToInt32(array, 0);
int LastByteIndex = 4;
int metarecordsize = -1;
byte[] splitMe;
for (int i = 0; i < recordsAmount; i++)
{
metarecordsize = BitConverter.ToInt32(array, LastByteIndex);
LastByteIndex += 4;
splitMe = new byte[metarecordsize];
Array.Copy(array, LastByteIndex, splitMe, 0, metarecordsize);
_records.Add(MetaRecord.FromByteArray(splitMe));
LastByteIndex += metarecordsize;
}
}
/// <summary>
/// Creates an instance of MetaRecord
/// </summary>
/// <param name="ByteArray">metadata in an array</param>
public static MetaRecord FromByteArray(byte[] array)
{
MetaRecord rm = new MetaRecord();
int length = array.Length - 9;
rm.IsFolder = Convert.ToBoolean(array[length]);
char[] strarray = new char[1024];
int charUsed, bytesUsed;
bool isCompleted;
Encoding.Default.GetDecoder().Convert(array, 0, length, strarray,
0, strarray.Length, true, out bytesUsed, out charUsed, out isCompleted);
rm.InitialTarget = new string(strarray, 0, charUsed);
rm._sizeOfData = BitConverter.ToInt64(array, length + 1);
return(rm);
}
public static void RestoreToPointedFolderHelper(ImageReader openedReader, MetaRecord record, string pointedFolder, bool imageDataIsPasswordProtected, string password)
{
try
{
string tempFile = Path.GetTempFileName();
UnpackParameters unpackParameters;
if (imageDataIsPasswordProtected)
{
unpackParameters = new UnpackParameters(password, tempFile, pointedFolder);
}
else
{
unpackParameters = new UnpackParameters(tempFile, pointedFolder);
}
try
{
openedReader.Extract(record, tempFile);
UnpackArchive aup = new UnpackArchive(unpackParameters);
aup.StartJob();
}
finally
{
if (imageDataIsPasswordProtected)
{
BackupProcess.OverwriteFileWithZerosWithoutLogging(tempFile);
}
File.Delete(tempFile);
}
}
catch (Exception exc)
{
MessageBox.Show(exc.Message, string.Empty, MessageBoxButtons.OK, MessageBoxIcon.Error, MessageBoxDefaultButton.Button1, 0);
}
}
public static void RestoreToOriginalLocation(ImageReader openedReader, MetaRecord record, bool imageDataIsPasswordProtected, string password)
{
string folderThatHasThisFile = record.InitialTarget.Substring(0, record.InitialTarget.LastIndexOf("\\", StringComparison.InvariantCulture));
RestoreToPointedFolderHelper(openedReader, record, folderThatHasThisFile, imageDataIsPasswordProtected, password);
}