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package com.trilead.ssh2.channel;
import java.io.IOException;
import java.io.InputStream;
/**
* ChannelInputStream.
*
* @author Christian Plattner, plattner@trilead.com
* @version $Id: ChannelInputStream.java,v 1.1 2007/10/15 12:49:56 cplattne Exp $
*/
public final class ChannelInputStream extends InputStream
{
Channel c;
boolean isClosed = false;
boolean isEOF = false;
boolean extendedFlag = false;
ChannelInputStream(Channel c, boolean isExtended)
{
this.c = c;
this.extendedFlag = isExtended;
}
public int available() throws IOException
{
if (isEOF)
return 0;
int avail = c.cm.getAvailable(c, extendedFlag);
/* We must not return -1 on EOF */
return (avail > 0) ? avail : 0;
}
public void close() throws IOException
{
isClosed = true;
}
public int read(byte[] b, int off, int len) throws IOException
{
if (b == null)
throw new NullPointerException();
if ((off < 0) || (len < 0) || ((off + len) > b.length) || ((off + len) < 0) || (off > b.length))
throw new IndexOutOfBoundsException();
if (len == 0)
return 0;
if (isEOF)
return -1;
int ret = c.cm.getChannelData(c, extendedFlag, b, off, len);
if (ret == -1)
{
isEOF = true;
}
return ret;
}
public int read(byte[] b) throws IOException
{
return read(b, 0, b.length);
}
public int read() throws IOException
{
/* Yes, this stream is pure and unbuffered, a single byte read() is slow */
final byte b[] = new byte[1];
int ret = read(b, 0, 1);
if (ret != 1)
return -1;
return b[0] & 0xff;
}
}
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