/**
* $Id$
* $Date$
*
*/
package org.xmlsh.sh.core;
import java.io.PrintWriter;
import org.xmlsh.sh.shell.ControlLoop;
import org.xmlsh.sh.shell.Shell;
public class WhileClause extends CompoundCommandExpr {
private CommandExpr mWhile;
private CommandExpr mDo;
public WhileClause(CommandExpr while1, CommandExpr do1) {
super();
mWhile = while1;
mDo = do1;
setLocation(do1);
}
@Override
public void print(PrintWriter out, boolean bExec) {
out.print("while ");
mWhile.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.keepRunning() && Shell.toBool(shell.execCondition(mWhile))) {
shell.exec(mDo);
if(loop.mContinue) // continue clause - clear out continue & keep going
loop.mContinue = false;
}
} 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.
//