public UnzipReadStream (UnzipArchive archive, CompressionOption compressionLevel)
{
Archive = archive;
Archive.FileActive = true;
CompressionLevel = compressionLevel;
length = NativeVersion.Use32Bit ? NativeUnzip.CurrentFileLength32 (Archive.Handle) : NativeUnzip.CurrentFileLength64 (Archive.Handle);
}
public UnzipReadStream(UnzipArchive archive, CompressionOption compressionLevel)
{
Archive = archive;
Archive.FileActive = true;
CompressionLevel = compressionLevel;
length = NativeUnzip.CurrentFileLength(Archive.Handle);
}
protected override Stream GetStreamCore (FileMode mode, FileAccess access)
{
ZipPartStream zps;
MemoryStream stream;
if (Package.PartStreams.TryGetValue (Uri, out stream)) {
zps = new ZipPartStream (Package, stream, access);
if (mode == FileMode.Create)
stream.SetLength (0);
return new ZipPartStream (Package, stream, access);
}
stream = new MemoryStream ();
try
{
using (UnzipArchive archive = new UnzipArchive (Package.PackageStream)) {
foreach (string file in archive.GetFiles ()) {
if (file != Uri.ToString ().Substring (1))
continue;
using (Stream archiveStream = archive.GetStream (file)) {
int read = 0;
byte[] buffer = new byte [Math.Min (archiveStream.Length, 2 * 1024)];
while ((read = archiveStream.Read (buffer, 0, buffer.Length)) != 0)
stream.Write (buffer, 0, read);
}
}
}
}
catch
{
// The zipfile is invalid, so just create the file
// as if it didn't exist
stream.SetLength (0);
}
Package.PartStreams.Add (Uri, stream);
if (mode == FileMode.Create)
stream.SetLength (0);
return new ZipPartStream (Package, stream, access);
}
