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Diffstat (limited to 'libjava/java/io/BufferedOutputStream.java')
-rw-r--r-- | libjava/java/io/BufferedOutputStream.java | 222 |
1 files changed, 0 insertions, 222 deletions
diff --git a/libjava/java/io/BufferedOutputStream.java b/libjava/java/io/BufferedOutputStream.java deleted file mode 100644 index 09e0db822d0..00000000000 --- a/libjava/java/io/BufferedOutputStream.java +++ /dev/null @@ -1,222 +0,0 @@ -/* BufferedOutputStream.java -- Buffer output into large blocks before writing - Copyright (C) 1998, 2000 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 accumulates bytes written in a buffer instead of immediately - * writing the data to the underlying output sink. The bytes are instead - * as one large block when the buffer is filled, or when the stream is - * closed or explicitly flushed. This mode operation can provide a more - * efficient mechanism for writing versus doing numerous small unbuffered - * writes. - * - * @version 0.0 - * - * @author Aaron M. Renn (arenn@urbanophile.com) - */ -public class BufferedOutputStream extends FilterOutputStream -{ - -/*************************************************************************/ - -/* - * Class Variables - */ - -/** - * This is the default buffer size - */ -private static final int DEFAULT_BUFFER_SIZE = 512; - -/*************************************************************************/ - -/* - * Instance Variables - */ - -/** - * This is the internal byte array used for buffering output before - * writing it. - */ -protected byte[] buf; - -/** - * This is the number of bytes that are currently in the buffer and - * are waiting to be written to the underlying stream. It always points to - * the index into the buffer where the next byte of data will be stored - */ -protected int count; - -/*************************************************************************/ - -/* - * Constructors - */ - -/** - * This method initializes a new <code>BufferedOutputStream</code> instance - * that will write to the specified subordinate <code>OutputStream</code> - * and which will use a default buffer size of 512 bytes. - * - * @param out The underlying <code>OutputStream</code> to write data to - */ -public -BufferedOutputStream(OutputStream out) -{ - this(out, DEFAULT_BUFFER_SIZE); -} - -/*************************************************************************/ - -/** - * This method initializes a new <code>BufferedOutputStream</code> instance - * that will write to the specified subordinate <code>OutputStream</code> - * and which will use the specified buffer size - * - * @param out The underlying <code>OutputStream</code> to write data to - * @param size The size of the internal buffer - */ -public -BufferedOutputStream(OutputStream out, int size) -{ - super(out); - - buf = new byte[size]; -} - -/*************************************************************************/ - -/* - * Instance Methods - */ - -/** - * This method causes any currently buffered bytes to be immediately - * written to the underlying output stream. - * - * @exception IOException If an error occurs - */ -public synchronized void -flush() throws IOException -{ - if (count == 0) - return; - - out.write(buf, 0, count); - count = 0; -} - -/*************************************************************************/ - -/* - * This method flushes any remaining buffered bytes then closes the - * underlying output stream. Any further attempts to write to this stream - * may throw an exception - * -public synchronized void -close() throws IOException -{ - flush(); - out.close(); -} -*/ - -/*************************************************************************/ - -/* - * This method runs when the object is garbage collected. It is - * responsible for ensuring that all buffered bytes are written and - * for closing the underlying stream. - * - * @exception IOException If an error occurs (ignored by the Java runtime) - * -protected void -finalize() throws IOException -{ - close(); -} -*/ - -/*************************************************************************/ - -/** - * This method writes a single byte of data. This will be written to the - * buffer instead of the underlying data source. However, if the buffer - * is filled as a result of this write request, it will be flushed to the - * underlying output stream. - * - * @param b The byte of data to be written, passed as an int - * - * @exception IOException If an error occurs - */ -public synchronized void -write(int b) throws IOException -{ - buf[count] = (byte)(b & 0xFF); - - ++count; - if (count == buf.length) - flush(); -} - -/*************************************************************************/ - -/** - * This method writes <code>len</code> bytes from the byte array - * <code>buf</code> starting at position <code>offset</code> in the buffer. - * These bytes will be written to the internal buffer. However, if this - * write operation fills the buffer, the buffer will be flushed to the - * underlying output stream. - * - * @param buf The array of bytes to write. - * @param offset The index into the byte array to start writing from. - * @param len The number of bytes to write. - * - * @exception IOException If an error occurs - */ -public synchronized void -write(byte[] buf, int offset, int len) throws IOException -{ - // Buffer can hold everything. Note that the case where LEN < 0 - // is automatically handled by the downstream write. - if (len < (this.buf.length - count)) - { - System.arraycopy(buf, offset, this.buf, count, len); - count += len; - } - else - { - // The write was too big. So flush the buffer and write the new - // bytes directly to the underlying stream, per the JDK 1.2 - // docs. - flush(); - out.write (buf, offset, len); - } -} - -} // class BufferedOutputStream |