/**
 * $Id$
 * $Date$
 *
 */

package org.xmlsh.sh.core;

import java.io.PrintWriter;
import org.xmlsh.sh.shell.ControlLoop;
import org.xmlsh.sh.shell.Shell;

public class UntilClause extends CompoundCommandExpr {
  private CommandExpr mUntil;
  private CommandExpr mDo;

  public UntilClause(CommandExpr until1, CommandExpr do1) {
    super();
    mUntil = until1;
    mDo = do1;
    setLocation(do1);
  }

  @Override
  public void print(PrintWriter out, boolean bExec) {
    out.print("until ");
    mUntil.print(out, bExec);
    out.println(" do");
    mDo.print(out, bExec);
    out.println("done");
  }

  @Override
  public int exec(Shell shell) throws Exception {

    shell.getEnv().saveIO();
    ControlLoop loop = shell.pushLoop(getSourceLocation());
    try {
      applyRedirect(shell);
      while(!Shell.toBool(shell.execCondition(mUntil)) && shell.keepRunning()) {

        shell.exec(mDo);
      }

    } finally {
      shell.popLoop(loop);
      shell.getEnv().restoreIO();
    }

    return 0;

  }

}
//
//
// Copyright (C) 2008-2014 David A. Lee.
//
// The contents of this file are subject to the "Simplified BSD License" (the
// "License");
// you may not use this file except in compliance with the License. You may
// obtain a copy of the
// License at http://www.opensource.org/licenses/bsd-license.php
//
// Software distributed under the License is distributed on an "AS IS" basis,
// WITHOUT WARRANTY OF ANY KIND, either express or implied.
// See the License for the specific language governing rights and limitations
// under the License.
//
// The Original Code is: all this file.
//
// The Initial Developer of the Original Code is David A. Lee
//
// Portions created by (your name) are Copyright (C) (your legal entity). All
// Rights Reserved.
//
// Contributor(s): none.
//