/*
* UnsetCmd.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: UnsetCmd.java,v 1.2 1999/07/28 03:28:52 mo Exp $
*
*/
using System;
namespace tcl.lang
{

  /// <summary> This class implements the built-in "unset" command in Tcl.</summary>

  class UnsetCmd : Command
  {
    /// <summary> Tcl_UnsetObjCmd -> UnsetCmd.cmdProc
    /// 
    /// Unsets Tcl variable (s). See Tcl user documentation * for
    /// details.
    /// </summary>
    /// <exception cref=""> TclException If tries to unset a variable that does
    /// not exist.
    /// </exception>

    public TCL.CompletionCode cmdProc( Interp interp, TclObject[] objv )
    {
      switch ( objv.Length )
      {
        case 2:
          interp.unsetVar( objv[1], 0 );
          break;
        case 3:
          for ( int i = ( objv[1].ToString() != "-nocomplain" ) ? 1 : 2; i < objv.Length; i++ )
          {
            Var.unsetVar( interp, objv[i].ToString(), 0 );
          }
          break;
        default:
          if ( objv.Length < 2 )
          {
            throw new TclNumArgsException( interp, 1, objv, "varName ?varName ...?" );
          }
          break;
      }

      return TCL.CompletionCode.RETURN;
    }
  }
}