gcc/libjava/java/io/DataOutputStream.java

/* DataOutputStream.java -- Writes primitive Java datatypes to streams
   Copyright (C) 1998, 2001, 2003 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.

Linking this library statically or dynamically with other modules is
making a combined work based on this library.  Thus, the terms and
conditions of the GNU General Public License cover the whole
combination.

As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
executable, regardless of the license terms of these independent
modules, and to copy and distribute the resulting executable under
terms of your choice, provided that you also meet, for each linked
independent module, the terms and conditions of the license of that
module.  An independent module is a module which is not derived from
or based on this library.  If you modify this library, you may extend
this exception to your version of the library, but you are not
obligated to do so.  If you do not wish to do so, delete this
exception statement from your version. */


package java.io;

/**
 * @author Tom Tromey <tromey@cygnus.com>
 * @date September 24, 1998 
 */

/* Written using "Java Class Libraries", 2nd edition, ISBN 0-201-31002-3
 * "The Java Language Specification", ISBN 0-201-63451-1
 * Status:  Complete to version 1.1.
 */

public class DataOutputStream extends FilterOutputStream implements DataOutput
{
  public DataOutputStream (OutputStream out)
  {
    super (out);
    written = 0;
  }

  public void flush () throws IOException
  {
    out.flush();
  }

  public final int size ()
  {
    return written;
  }

  public synchronized void write (int b) throws IOException
  {
    out.write(b);
    ++written;
  }

  public synchronized void write (byte[] b, int off, int len)
    throws IOException, NullPointerException, IndexOutOfBoundsException
  {
    out.write(b, off, len);
    written += len;
  }

  public final void writeBoolean (boolean v) throws IOException
  {
    write (v ? 1 : 0);
  }

  public final void writeByte (int v) throws IOException
  {
    write (v & 0xff);
  }

  public final void writeShort (int v) throws IOException
  {
    write ((byte) (0xff & (v >> 8)));
    write ((byte) (0xff & v));
  }

  public final void writeChar (int v) throws IOException
  {
    write ((byte) (0xff & (v >> 8)));
    write ((byte) (0xff & v));
  }

  public final void writeInt (int v) throws IOException
  {
    write ((byte) (0xff & (v >> 24)));
    write ((byte) (0xff & (v >> 16)));
    write ((byte) (0xff & (v >>  8)));
    write ((byte) (0xff & v));
  }

  public final void writeLong (long v) throws IOException
  {
    write ((byte) (0xff & (v >> 56)));
    write ((byte) (0xff & (v >> 48)));
    write ((byte) (0xff & (v >> 40)));
    write ((byte) (0xff & (v >> 32)));
    write ((byte) (0xff & (v >> 24)));
    write ((byte) (0xff & (v >> 16)));
    write ((byte) (0xff & (v >>  8)));
    write ((byte) (0xff & v));
  }

  public final void writeFloat (float v) throws IOException
  {
    writeInt (Float.floatToIntBits(v));
  }

  public final void writeDouble (double v) throws IOException
  {
    writeLong (Double.doubleToLongBits(v));
  }

  public final void writeBytes (String s) throws IOException
  {
    int len = s.length();
    for (int i = 0; i < len; ++i)
      writeByte (s.charAt(i));
  }

  public final void writeChars (String s) throws IOException
  {
    int len = s.length();
    for (int i = 0; i < len; ++i)
      writeChar (s.charAt(i));
  }

  public final void writeUTF (String s) throws IOException
  {
    int len = s.length();
    int sum = 0;

    for (int i = 0; i < len && sum <= 65535; ++i)
      {
	char c = s.charAt(i);
	if (c >= '\u0001' && c <= '\u007f')
	  sum += 1;
	else if (c == '\u0000' || (c >= '\u0080' && c <= '\u07ff'))
	  sum += 2;
	else
	  sum += 3;
      }

    if (sum > 65535)
      throw new UTFDataFormatException ();

    writeShort (sum);

    for (int i = 0; i < len; ++i)
      {
	char c = s.charAt(i);
	if (c >= '\u0001' && c <= '\u007f')
	  write (c);
	else if (c == '\u0000' || (c >= '\u0080' && c <= '\u07ff'))
	  {
	    write (0xc0 | (0x1f & (c >> 6)));
	    write (0x80 | (0x3f & c));
	  }
	else
	  {
	    // JSL says the first byte should be or'd with 0xc0, but
	    // that is a typo.  Unicode says 0xe0, and that is what is
	    // consistent with DataInputStream.
	    write (0xe0 | (0x0f & (c >> 12)));
	    write (0x80 | (0x3f & (c >> 6)));
	    write (0x80 | (0x3f & c));
	  }
      }
  }

  // Number of bytes written so far.
  protected int written;
}