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+/* JdwpString.java -- utility class to read and write jdwp strings
+ Copyright (C) 2005 Free Software Foundation
+
+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., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 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 gnu.classpath.jdwp.util;
+
+import gnu.classpath.jdwp.exception.JdwpInternalErrorException;
+
+import java.io.DataOutputStream;
+import java.io.IOException;
+import java.io.UnsupportedEncodingException;
+import java.nio.ByteBuffer;
+
+/**
+ * A class to compute the JDWP representation of Strings.
+ *
+ * @author Aaron Luchko <aluchko@redhat.com>
+ */
+public class JdwpString
+{
+
+ /**
+ * Write this String to the outStream as a string understood by jdwp.
+ *
+ * @param os write the String here
+ * @param string the String to write
+ * @throws IOException
+ */
+ public static void writeString(DataOutputStream os, String string)
+ throws IOException
+ {
+ // Get the bytes of the string as a string in UTF-8
+ byte[] strBytes = string.getBytes("UTF-8");
+ os.writeInt(strBytes.length);
+ os.write(strBytes);
+ }
+
+ /**
+ * Read a jdwp style string from the ByteBuffer.
+ *
+ * @param bb contains the string
+ * @return the String that was read
+ * @throws JdwpInternalErrorException bb didn't contain a value UTF-8 string
+ */
+ public static String readString(ByteBuffer bb)
+ throws JdwpInternalErrorException
+ {
+ int length = bb.getInt();
+ byte[] strBytes = new byte[length];
+ bb.get(strBytes);
+ try
+ {
+ return new String(strBytes, "UTF-8");
+ }
+ catch (UnsupportedEncodingException ex)
+ {
+ // Any string from the VM should be in UTF-8 so an encoding error
+ // shouldn't be possible
+ throw new JdwpInternalErrorException(ex);
+ }
+ }
+}