/// <summary>
/// Created a new Zip file with the given name.
/// </summary>
/// <param name="method"> Gzip or deflate</param>
/// <param name="name"> Zip name</param>
public XyzFile()
{
try
{
//zipName = name;
//baseStream = new FileStream(zipName, mode);
//thisWriter = new XyzEntryWriter(baseStream);
//thisWriter.Method = method;
//New File
//thisWriter.WriteSuperHeader(0, method);
//int index1 = zipName.IndexOf(XyzConstants.Dot);
//int index2 = zipName.LastIndexOf(XyzConstants.BackSlash);
//thisReader = new XyzEntryReader(baseStream, zipName.Substring(index2,
// index1 - index2));
//zipEntries = thisReader.GetAllEntries();
//CompressionForm.statusMessage =
// String.Format(
// System.Threading.Thread.CurrentThread.CurrentUICulture,
// XyzConstants.NewMessage, name);
}
catch (System.IO.IOException)
{
XyzConstants.ShowError(XyzConstants.IOError);
}
}
/// <summary>
/// Opens a Zip file with the given name.
/// </summary>
/// <param name="name"> Zip name</param>
public XyzFile(string name)
{
try
{
zipName = name;
baseStream = new FileStream(zipName, FileMode.Open);
thisWriter = new XyzEntryWriter(baseStream);
int index1 = zipName.IndexOf(XyzConstants.Dot);
int index2 = zipName.LastIndexOf(XyzConstants.BackSlash);
//thisReader = new XyzEntryReader(baseStream, zipName.Substring(index2,
// index1 - index2));
//zipEntries = thisReader.GetAllEntries();
//thisWriter.Method = thisReader.Method;
//if (CompressionForm.statusMessage != String.Empty)
// CompressionForm.statusMessage =
// String.Format(
// System.Threading.Thread.CurrentThread.CurrentUICulture,
// XyzConstants.OpenMessage, name);
}
catch (IOException)
{
XyzConstants.ShowError("Error opening the file");
}
catch (ArgumentOutOfRangeException)
{
XyzConstants.ShowError(XyzConstants.CorruptedError);
}
}
/// <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);
}
}
public static XyzHeadReader ReadXyzHead(System.IO.Stream stream)
{
byte[] byteTag = new byte[3];
// 00 ~ 03: 标识符号 : 是否是XYZ的标识(读取)
int iCount = stream.Read(byteTag, 0, byteTag.Length);
if (iCount != byteTag.Length)
{
return(null);
}
else if (XyzConstants.CheckBytes(byteTag, XyzHeadReader.XYZ_HEAD_TAG) == false)
{
return(null);
}
// 03 ~ 04: XYZ文件版本号(读取)
int iHeadVer = stream.ReadByte();
if (iHeadVer > (int)XyzHeadVersion.MaxValue)
{
return(null);
}
switch (iHeadVer)
{
case (int)XyzHeadVersion.XyzHeadVer01:
return(ReadXyzHeadVer01(stream));
default:
return(null);
}
}
/// <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);
}
}
public void Extract(int index, string path)
{
if (index < 0 || index >= zipEntries.Count)
{
XyzConstants.ShowError("Argument out of range" +
"exception");
return;
}
//thisReader.Extract(zipEntries[index], GetOffset(index + 1),
// path);
}
/// <summary>
/// Writes the superheader
/// Resets the pointer back to the original position
/// </summary>
/// <param name="number">Number of files in the archive</param>
private void WriteSuperHeader(Int16 number)
{
try{
long pos = baseStream.Position;
baseStream.Seek(0, SeekOrigin.Begin);
WriteLeInt16(number);
baseStream.Seek(pos, SeekOrigin.Begin);
}
catch (IOException)
{
XyzConstants.ShowError(XyzConstants.IOError);
}
catch (ArgumentException)
{
XyzConstants.ShowError(XyzConstants.SeekError);
}
}
/// <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);
}
}
