/*
* JoinCmd.java
*
* Copyright (c) 1997 Cornell University.
* Copyright (c) 1997 Sun Microsystems, Inc.
*
* See the file "license.terms" for information on usage and
* redistribution of this file, and for a DISCLAIMER OF ALL
* WARRANTIES.
* 
* Included in SQLite3 port to C# for use in testharness only;  2008 Noah B Hart
*
* RCS @(#) $Id: JoinCmd.java,v 1.1.1.1 1998/10/14 21:09:18 cvsadmin Exp $
*
*/
using System.Text;
namespace tcl.lang
{

  /// <summary> This class implements the built-in "join" command in Tcl.</summary>
  class JoinCmd : Command
  {

    /// <summary> See Tcl user documentation for details.</summary>
    public TCL.CompletionCode cmdProc( Interp interp, TclObject[] argv )
    {
      string sep = null;

      if ( argv.Length == 2 )
      {
        sep = null;
      }
      else if ( argv.Length == 3 )
      {

        sep = argv[2].ToString();
      }
      else
      {
        throw new TclNumArgsException( interp, 1, argv, "list ?joinString?" );
      }
      TclObject list = argv[1];
      int size = TclList.getLength( interp, list );

      if ( size == 0 )
      {
        interp.resetResult();
        return TCL.CompletionCode.RETURN;
      }


      StringBuilder sbuf = new StringBuilder( TclList.index( interp, list, 0 ).ToString() );

      for ( int i = 1; i < size; i++ )
      {
        if ( (System.Object)sep == null )
        {
          sbuf.Append( ' ' );
        }
        else
        {
          sbuf.Append( sep );
        }

        sbuf.Append( TclList.index( interp, list, i ).ToString() );
      }
      interp.setResult( sbuf.ToString() );
      return TCL.CompletionCode.RETURN;
    }
  }
}