/*

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * particular file as subject to the "Classpath" exception as provided

 *

 * This code 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

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 */

/*

 * COMPONENT_NAME: idl.toJava

 *

 * ORIGINS: 27

 *

 * Licensed Materials - Property of IBM

 * 5639-D57 (C) COPYRIGHT International Business Machines Corp. 1997, 1999

 * RMI-IIOP v1.0

 *

 */

package com.sun.tools.corba.se.idl.toJavaPortable;

// NOTES:

import java.util.Enumeration;

import java.util.Hashtable;

import com.sun.tools.corba.se.idl.*;

// This class is passed through the JavaGenerator.HelperType methods.

// It is ONLY used when a recursive sequence is detected. ie.

//

//   struct S1

//   {

//     sequence <S1> others;

//   };

/**

 *

 **/

public class TCOffsets

{

  /**

   * Return -1 if the given name is not in the list of types.

   **/

  public int offset (String name)

  {

    Integer value = (Integer)tcs.get (name);

    return value == null ? -1 : value.intValue ();

  } // offset

  /**

   *

   **/

  public void set (SymtabEntry entry)

  {

    if (entry == null)

      offset += 8;

    else

    {

      tcs.put (entry.fullName (), new Integer (offset));

      offset += 4;

      String repID = Util.stripLeadingUnderscoresFromID (entry.repositoryID ().ID ());

      if (entry instanceof InterfaceEntry)

        offset += alignStrLen (repID) + alignStrLen (entry.name ());

      else if (entry instanceof StructEntry)

        offset += alignStrLen (repID) + alignStrLen (entry.name ()) + 4;

      else if (entry instanceof UnionEntry)

        offset += alignStrLen (repID) + alignStrLen (entry.name ()) + 12;

      else if (entry instanceof EnumEntry)

      {

        offset += alignStrLen (repID) + alignStrLen (entry.name ()) + 4;

        Enumeration e = ((EnumEntry)entry).elements ().elements ();

        while (e.hasMoreElements ())

          offset += alignStrLen ((String)e.nextElement ());

      }

      else if (entry instanceof StringEntry)

        offset += 4;

      else if (entry instanceof TypedefEntry)

      {

        offset += alignStrLen (repID) + alignStrLen (entry.name ());

        if (((TypedefEntry)entry).arrayInfo ().size () != 0)

          offset += 8;

      }

    }

  } // set

  /**

   * Return the full length of the string type:  4 byte length, x bytes for

   * string + 1 for the null terminator, align it so it ends on a 4-byte

   * boundary.  This method assumes the string starts at a 4-byte boundary

   * since it doesn't do any leading alignment.

   **/

  public int alignStrLen (String string)

  {

    int len = string.length () + 1;

    int align = 4 - (len % 4);

    if (align == 4) align = 0;

    return len + align + 4;

  } // alignStrLen

  /**

   *

   **/

  public void setMember (SymtabEntry entry)

  {

    offset += alignStrLen (entry.name ());

    if (((TypedefEntry)entry).arrayInfo ().size () != 0)

      offset += 4;

  } // setMember

  /**

   *

   **/

  public int currentOffset ()

  {

    return offset;

  } // currentOffset

  /**

   *

   **/

  public void bumpCurrentOffset (int value)

  {

    offset += value;

  } // bumpCurrentOffset

  private Hashtable tcs    = new Hashtable ();

  private int       offset = 0;

} // class TCOffsets