/// <summary>
/// Remove an entry from the archive
/// </summary>
/// <param name="index">
/// The index of the entry that is to be removed
/// </param>
private void DeleteEntryFromFile(int index)
{
long jump = XyzConstants.SuperHeaderSize;
for (int i = 0; i < index; ++i)
{
jump += XyzConstants.FixedHeaderSize +
zipEntries[i].NameLength
//+zipEntries[i].CompressedSize
;
}
XyzEntry entry = zipEntries[index];
long fileJump = XyzConstants.FixedHeaderSize +
entry.NameLength
//+entry.CompressedSize
;
baseStream.Seek(jump + fileJump, SeekOrigin.Begin);
long length = baseStream.Length - fileJump - jump;
byte[] b = new byte[length];
baseStream.Read(b, 0, (int)length);
baseStream.Seek(jump, SeekOrigin.Begin);
baseStream.Write(b, 0, (int)length);
baseStream.SetLength(baseStream.Length - fileJump);
//CompressionForm.statusMessage = "Removed successfully";
}
/// <summary>
/// Remove an entry from the archive
/// </summary>
/// <param name="jump">
/// The offset of the file to be removed
/// </param>
public void Remove(long jump, XyzEntry entry)
{
try
{
//long fileJump = XyzConstants.FixedHeaderSize +
// entry.NameLength
// +entry.CompressedLength;
//baseStream.Seek( jump + fileJump, SeekOrigin.Begin );
//long length = baseStream.Length - fileJump - jump;
//byte[] b = new byte[length];
//baseStream.Read( b, 0, (int)length );
//baseStream.Seek( jump, SeekOrigin.Begin );
//baseStream.Write( b, 0, (int)length );
//baseStream.SetLength( baseStream.Length - fileJump );
//CompressionForm.statusMessage = "Removed successfully";
}
catch (ArgumentException)
{
XyzConstants.ShowError(XyzConstants.FileError);
}
catch (IOException)
{
XyzConstants.ShowError(XyzConstants.IOError);
}
}
/// <summary>
/// Add a new entry to the zip
/// </summary>
/// <param name="entry">
/// The details about the header of the entry
/// </param>
public void Add(XyzEntry entry)
{
FileStream fs = null;
try
{
fs = File.OpenRead(entry.Name);
//entry.Size = (Int32)fs.Length;
entry.DateTime = File.GetLastWriteTime(entry.Name);
PutNextHeader(entry);
WriteCompressedFile(fs, entry);
//CompressionForm.statusMessage = XyzConstants.AddMessage;
}
catch (ArgumentOutOfRangeException)
{
XyzConstants.ShowError(XyzConstants.ArgumentError);
}
catch (ArgumentException)
{
XyzConstants.ShowError(XyzConstants.FileError);
}
catch (FileNotFoundException)
{
XyzConstants.ShowError(XyzConstants.FileNotFoundError);
}
catch (IOException)
{
XyzConstants.ShowError(XyzConstants.IOError);
}
catch (OutOfMemoryException)
{
XyzConstants.ShowError(XyzConstants.MemoryError);
}
}
/// <summary>
/// Writes the compressed data into the basestream
/// It instantiates a memory stream which will serve
/// as a temp store and then compresses it using Gzip Stream or
/// Deflate stream and writes it to the base stream
/// </summary>
private void WriteCompressedFile(FileStream fStream, XyzEntry entry)
{
MemoryStream ms = new MemoryStream();
try
{
if (method == XyzConstants.DEFLATE)
{
zipStream = new DeflateStream(ms, CompressionMode.Compress,
true);
}
else if (method == XyzConstants.GZIP)
{
zipStream = new GZipStream(ms, CompressionMode.Compress,
true);
}
byte[] buffer = new byte[fStream.Length];
fStream.Read(buffer, 0, buffer.Length);
zipStream.Write(buffer, 0, buffer.Length);
zipStream.Close();
byte[] b = new byte[ms.Length];
ms.Seek(0, SeekOrigin.Begin);
ms.Read(b, 0, b.Length);
baseStream.Write(b, 0, b.Length);
//Go back and write the length and the CRC
WriteCompressedLengthCRC((int)ms.Length, ComputeMD5(b), entry);
}
catch (IOException)
{
XyzConstants.ShowError(XyzConstants.IOError);
}
catch (ArgumentException)
{
XyzConstants.ShowError(XyzConstants.SeekError);
}
finally
{
ms.Close();
}
}
public void Add(string fileName)
{
System.Globalization.CultureInfo ci =
System.Threading.Thread.CurrentThread.CurrentUICulture;
if (fileName.ToLower(ci).Equals(zipName.ToLower(ci)))
{
XyzConstants.ShowError("Cannot add the current xip file");
//CompressionForm.statusMessage = String.Empty;
return;
}
XyzEntry entry = new XyzEntry(fileName);
thisWriter.Add(entry);
//if (CompressionForm.statusMessage.Length != 0)
//{
// zipEntries.Add(entry);
// thisWriter.CloseHeaders((Int16)zipEntries.Count);
//}
}
private void WriteCompressedLengthCRC(Int32 value, byte[] crc,
XyzEntry entry)
{
try{
//entry.CompressedLength = value;
entry.SetCrc(crc);
baseStream.Seek(offset, SeekOrigin.Begin);
//WriteLeInt32(entry.CompressedLength);
WriteBytes(crc);
//Remove the recorded offset
offset = -1;
baseStream.Seek(0, SeekOrigin.End);
}
catch (IOException)
{
XyzConstants.ShowError(XyzConstants.IOError);
}
catch (ArgumentException)
{
XyzConstants.ShowError(XyzConstants.ArgumentError);
}
}
/// <summary>
/// Puts the next header in a predefined order
/// </summary>
/// <param name="entry">
/// the XyzEntry which contains all the information
/// </param>
private void PutNextHeader(XyzEntry entry)
{
try{
//WriteLeInt32(entry.Size);
////REcord the offset to write proper CRC and compressed size
//offset = baseStream.Position;
//WriteLeInt32(entry.CompressedLength);
//WriteBytes(entry.GetCrc());
//WriteLeInt32(entry.DosTime);
//WriteLeInt16(entry.NameLength);
//byte[] names = ConvertToArray(entry.Name);
//baseStream.Write(names, 0, names.Length);
}
catch (IOException)
{
XyzConstants.ShowError(XyzConstants.IOError);
}
catch (ArgumentException)
{
XyzConstants.ShowError(XyzConstants.SeekError);
}
}
public bool DeleteEntry(XyzEntry entry)
{
return(false);
}
