private IntPtr IterateCallback(NativeMethods.FdiNotificationType fdint, NativeMethods.FdiNotification fdin)
{
switch (fdint)
{
case NativeMethods.FdiNotificationType.CopyFile:
return(OutputFileOpen(fdin));
default:
return(IntPtr.Zero);
}
}
private IntPtr ExtractCallback(NativeMethods.FdiNotificationType fdint, NativeMethods.FdiNotification fdin)
{
switch (fdint)
{
case NativeMethods.FdiNotificationType.CopyFile:
return(CopyFiles(fdin));
case NativeMethods.FdiNotificationType.CloseFileInfo:
return(OutputFileClose(fdin));
default:
return(IntPtr.Zero);
}
}
private IntPtr CopyFiles(NativeMethods.FdiNotification fdin)
{
var fileName = GetFileName(fdin);
var extractFile = _currentFileToDecompress.Name == fileName ? _currentFileToDecompress : null;
if (extractFile != null)
{
var stream = new MemoryStream();
GCHandle gch = GCHandle.Alloc(stream);
extractFile.Handle = (IntPtr)gch;
return(extractFile.Handle);
}
//Do not extract this file
return(IntPtr.Zero);
}
private IntPtr OutputFileClose(NativeMethods.FdiNotification fdin)
{
var extractFile = _currentFileToDecompress.Handle == fdin.hf ? _currentFileToDecompress : null;
var stream = StreamFromHandle(fdin.hf);
if (extractFile != null)
{
extractFile.Found = true;
extractFile.Length = (int)stream.Length;
if (stream.Length > 0)
{
extractFile.Data = new byte[stream.Length];
stream.Position = 0;
stream.Read(extractFile.Data, 0, (int)stream.Length);
}
}
stream.Close();
return(IntPtr.Zero);
}
private static string GetFileName(NativeMethods.FdiNotification notification)
{
var encoding = ((int)notification.attribs & 128) != 0 ? Encoding.UTF8 : Encoding.Default;
int length = 0;
while (Marshal.ReadByte(notification.psz1, length) != 0)
{
checked { ++length; }
}
var numArray = new byte[length];
Marshal.Copy(notification.psz1, numArray, 0, length);
string path = encoding.GetString(numArray);
if (Path.IsPathRooted(path))
{
path = path.Replace(String.Concat(Path.VolumeSeparatorChar), "");
}
return(path);
}
private IntPtr OutputFileOpen(NativeMethods.FdiNotification fdin)
{
var extractFile = new ArchiveFile {
Name = GetFileName(fdin)
};
if (ShouldIgnoreFile(extractFile))
{
//ignore this file.
return(IntPtr.Zero);
}
var stream = new MemoryStream();
GCHandle gch = GCHandle.Alloc(stream);
extractFile.Handle = (IntPtr)gch;
AddToListOfFiles(extractFile);
//return IntPtr.Zero so that the iteration will keep on going
return(IntPtr.Zero);
}
