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using System;
using System.IO;
namespace SharpCifs.Util.Sharpen
{
public class InputStream : IDisposable
{
private long _mark;
protected Stream Wrapped;
protected Stream BaseStream;
public static implicit operator InputStream (Stream s)
{
return Wrap (s);
}
public static implicit operator Stream (InputStream s)
{
return s.GetWrappedStream ();
}
public virtual int Available ()
{
if (Wrapped is WrappedSystemStream)
return ((WrappedSystemStream)Wrapped).InputStream.Available ();
return 0;
}
public virtual void Close ()
{
if (Wrapped != null) {
//Stream.`Close` method deleted
//Wrapped.Close ();
Wrapped.Dispose();
}
}
public void Dispose ()
{
Close ();
}
internal Stream GetWrappedStream ()
{
// Always create a wrapper stream (not directly Wrapped) since the subclass
// may be overriding methods that need to be called when used through the Stream class
return new WrappedSystemStream (this);
}
public virtual void Mark (int readlimit)
{
if (Wrapped is WrappedSystemStream)
((WrappedSystemStream)Wrapped).InputStream.Mark (readlimit);
else {
if (BaseStream is WrappedSystemStream)
((WrappedSystemStream)BaseStream).OnMark (readlimit);
if (Wrapped != null)
_mark = Wrapped.Position;
}
}
public virtual bool MarkSupported ()
{
if (Wrapped is WrappedSystemStream)
return ((WrappedSystemStream)Wrapped).InputStream.MarkSupported ();
return ((Wrapped != null) && Wrapped.CanSeek);
}
public virtual int Read ()
{
if (Wrapped == null) {
throw new NotImplementedException ();
}
return Wrapped.ReadByte ();
}
public virtual int Read (byte[] buf)
{
return Read (buf, 0, buf.Length);
}
public virtual int Read (byte[] b, int off, int len)
{
if (Wrapped is WrappedSystemStream)
return ((WrappedSystemStream)Wrapped).InputStream.Read (b, off, len);
if (Wrapped != null) {
int num = Wrapped.Read (b, off, len);
return ((num <= 0) ? -1 : num);
}
int totalRead = 0;
while (totalRead < len) {
int nr = Read ();
if (nr == -1)
return -1;
b[off + totalRead] = (byte)nr;
totalRead++;
}
return totalRead;
}
public virtual void Reset ()
{
if (Wrapped is WrappedSystemStream)
((WrappedSystemStream)Wrapped).InputStream.Reset ();
else {
if (Wrapped == null)
throw new IOException ();
Wrapped.Position = _mark;
}
}
public virtual long Skip (long cnt)
{
if (Wrapped is WrappedSystemStream)
return ((WrappedSystemStream)Wrapped).InputStream.Skip (cnt);
long n = cnt;
while (n > 0) {
if (Read () == -1)
return cnt - n;
n--;
}
return cnt - n;
}
internal virtual bool CanSeek ()
{
if (Wrapped != null)
return Wrapped.CanSeek;
return false;
}
internal virtual long Position {
get
{
if (Wrapped != null)
return Wrapped.Position;
throw new NotSupportedException ();
}
set {
if (Wrapped != null)
Wrapped.Position = value;
else
throw new NotSupportedException ();
}
}
public virtual long Length
{
get
{
if (Wrapped != null)
{
return Wrapped.Length;
}
throw new NotSupportedException();
}
}
static internal InputStream Wrap (Stream s)
{
InputStream stream = new InputStream ();
stream.Wrapped = s;
return stream;
}
}
}
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