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-rw-r--r--libjava/java/io/PipedWriter.java217
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diff --git a/libjava/java/io/PipedWriter.java b/libjava/java/io/PipedWriter.java
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--- a/libjava/java/io/PipedWriter.java
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-/* PipedWriter.java -- Write portion of piped streams.
- Copyright (C) 1998 Free Software Foundation, Inc.
-
-This file is part of GNU Classpath.
-
-GNU Classpath is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
-any later version.
-
-GNU Classpath is distributed in the hope that it will be useful, but
-WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with GNU Classpath; see the file COPYING. If not, write to the
-Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
-02111-1307 USA.
-
-As a special exception, if you link this library with other files to
-produce an executable, this library does not by itself cause the
-resulting executable to be covered by the GNU General Public License.
-This exception does not however invalidate any other reasons why the
-executable file might be covered by the GNU General Public License. */
-
-
-package java.io;
-
-/**
- * This class writes its chars to a <code>PipedReader</code> to
- * which it is connected.
- * <p>
- * It is highly recommended that a <code>PipedWriter</code> and its
- * connected <code>PipedReader</code> be in different threads. If
- * they are in the same thread, read and write operations could deadlock
- * the thread.
- *
- * @version 0.0
- *
- * @author Aaron M. Renn (arenn@urbanophile.com)
- */
-public class PipedWriter extends Writer
-{
-
-/*************************************************************************/
-
-/*
- * Instance Variables
- */
-
-/**
- * This is the <code>PipedReader</code> to which this object
- * is connected.
- */
-private PipedReader snk;
-
-/**
- * This flag indicates whether or not this stream has ever been
- * connected to an input stream
- */
-private boolean ever_connected;
-
-/**
- * This flag indicates whether the <code>close</code> method has ever
- * been called for this stream.
- */
-private boolean closed;
-
-/*************************************************************************/
-
-/**
- * This method initializes a new <code>PipedWriter</code> instance.
- * This constructor creates an unconnected object. It must be connected
- * to a <code>PipedReader</code> object using the <code>connect</code>
- * method prior to writing any data or an exception will be thrown.
- */
-public
-PipedWriter()
-{
- ; // Do Nothing
-}
-
-/*************************************************************************/
-
-/**
- * This method initializes a new <code>PipedWriter</code> instance
- * to write to the specified <code>PipedReader</code>. This stream
- * is then ready for writing.
- *
- * @param snk The <code>PipedReader</code> to connect this stream to.
- *
- * @exception IOException If an error occurs
- */
-public
-PipedWriter(PipedReader snk) throws IOException
-{
- connect(snk);
-}
-
-/*************************************************************************/
-
-/*
- * Instance Methods
- */
-
-/**
- * This method connects this object to the specified
- * <code>PipedReader</code> object. This stream will then be ready
- * for writing. If this stream is already connected or has been
- * previously closed, then an exception is thrown.
- *
- * @param snk The <code>PipedReader</code> to connect this stream to
- *
- * @exception IOException If an error occurs
- */
-public void
-connect(PipedReader snk) throws IOException
-{
- if (snk == this.snk)
- return;
-
- if (ever_connected)
- throw new IOException("Already connected");
-
- if (closed)
- throw new IOException("Stream is closed and cannot be reopened");
-
- synchronized (lock) {
-
- this.snk = snk;
- ever_connected = true;
- snk.src = this;
-
- snk.connect(this);
-
- } // synchronized
-}
-
-/*************************************************************************/
-
-/**
- * This method closes this stream so that no more data can be written
- * to it. Any further attempts to write to this stream may throw an
- * exception
- *
- * @exception IOException If an error occurs
- */
-public void
-close() throws IOException
-{
- synchronized (lock) {
-
- closed = true;
- snk.close();
- notifyAll();
-
- } // synchronized
-}
-
-/*************************************************************************/
-
-/**
- * This methods writes a single byte of data to the pipe. This call may
- * block if the pipe is full.
- *
- * @param c The <code>char</code> to write, passed as an <code>int</code>.
- *
- * @exception IOException If an error occurs.
- */
-public void
-write(int c) throws IOException
-{
- char[] buf = new char[1];
- buf[0] = (char)c;
-
- write(buf, 0, buf.length);
-}
-
-/*************************************************************************/
-
-/**
- * This method writes <code>len</code> chars of data from the char array
- * <code>buf</code> starting at index <code>offset</code> in the array
- * to the stream. Note that this method will block if the
- * <code>PipedReader</code> to which this object is connected has
- * a buffer that cannot hold all of the chars to be written.
- *
- * @param buf The array containing chars to write to thes stream.
- * @param offset The index into the array to start writing chars from.
- * @param len The number of chars to write.
- *
- * @exception IOException If an error occurs
- */
-public void
-write(char[] buf, int offset, int len) throws IOException
-{
- snk.write(buf, 0, len);
-}
-
-/*************************************************************************/
-
-/**
- * This method flushes any unwritten chars to the underlying output
- * sink. This method does nothing in this class because this class does
- * not buffer any chars.
- *
- * @exception IOException If an error occurs
- */
-public void
-flush() throws IOException
-{
- ; // Do Nothing
-}
-
-} // class PipedWriter
-