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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libjava/] [classpath/] [gnu/] [classpath/] [jdwp/] [util/] [JdwpString.java] - Blame information for rev 769

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1 769 jeremybenn
/* JdwpString.java -- utility class to read and write jdwp strings
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   Copyright (C) 2005 Free Software Foundation
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING.  If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library.  Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module.  An independent module is a module which is not derived from
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or based on this library.  If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so.  If you do not wish to do so, delete this
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exception statement from your version. */
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package gnu.classpath.jdwp.util;
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import gnu.classpath.jdwp.exception.JdwpInternalErrorException;
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import java.io.DataOutputStream;
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import java.io.IOException;
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import java.io.UnsupportedEncodingException;
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import java.nio.ByteBuffer;
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/**
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 * A class to compute the JDWP representation of Strings.
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 *
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 * @author Aaron Luchko <aluchko@redhat.com>
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 */
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public class JdwpString
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{
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  /**
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   * Write this String to the outStream as a string understood by jdwp.
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   *
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   * @param os write the String here
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   * @param string the String to write
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   * @throws IOException
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   */
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  public static void writeString(DataOutputStream os, String string)
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      throws IOException
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  {
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    // Get the bytes of the string as a string in UTF-8
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    byte[] strBytes = string.getBytes("UTF-8");
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    os.writeInt(strBytes.length);
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    os.write(strBytes);
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  }
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  /**
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   * Read a jdwp style string from the ByteBuffer.
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   *
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   * @param bb contains the string
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   * @return the String that was read
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   * @throws JdwpInternalErrorException bb didn't contain a value UTF-8 string
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   */
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  public static String readString(ByteBuffer bb)
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      throws JdwpInternalErrorException
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  {
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    int length = bb.getInt();
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    byte[] strBytes = new byte[length];
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    bb.get(strBytes);
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    try
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      {
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        return new String(strBytes, "UTF-8");
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      }
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    catch (UnsupportedEncodingException ex)
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      {
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        // Any string from the VM should be in UTF-8 so an encoding error
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        // shouldn't be possible
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        throw new JdwpInternalErrorException(ex);
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      }
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  }
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}

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