/**
* Copyright (c) 2005-2017, KoLmafia development team
* http://kolmafia.sourceforge.net/
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* [1] Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* [2] Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* [3] Neither the name "KoLmafia" nor the names of its contributors may
* be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION ) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE ) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
package net.sourceforge.kolmafia.textui.parsetree;
import java.io.PrintStream;
import net.sourceforge.kolmafia.KoLmafia;
import net.sourceforge.kolmafia.textui.DataTypes;
import net.sourceforge.kolmafia.textui.Interpreter;
public class WhileLoop
extends Loop
{
private final Value condition;
public WhileLoop( final Scope scope, final Value condition )
{
super( scope );
this.condition = condition;
}
public Value getCondition()
{
return this.condition;
}
@Override
public Value execute( final Interpreter interpreter )
{
if ( !KoLmafia.permitsContinue() )
{
interpreter.setState( Interpreter.STATE_EXIT );
return null;
}
interpreter.traceIndent();
if ( interpreter.isTracing() )
{
interpreter.trace( this.toString() );
}
while ( true )
{
if ( interpreter.isTracing() )
{
interpreter.trace( "Test: " + this.condition );
}
Value conditionResult = this.condition.execute( interpreter );
interpreter.captureValue( conditionResult );
if ( interpreter.isTracing() )
{
interpreter.trace( "[" + interpreter.getState() + "] <- " + conditionResult );
}
if ( conditionResult == null )
{
interpreter.traceUnindent();
return null;
}
if ( conditionResult.intValue() != 1 )
{
break;
}
Value result = super.execute( interpreter );
if ( interpreter.getState() == Interpreter.STATE_BREAK )
{
interpreter.setState( Interpreter.STATE_NORMAL );
interpreter.traceUnindent();
return DataTypes.VOID_VALUE;
}
if ( interpreter.getState() != Interpreter.STATE_NORMAL )
{
interpreter.traceUnindent();
return result;
}
}
interpreter.traceUnindent();
return DataTypes.VOID_VALUE;
}
@Override
public boolean assertBarrier()
{
return this.condition == DataTypes.TRUE_VALUE &&
!this.getScope().assertBreakable();
}
@Override
public String toString()
{
return "while";
}
@Override
public void print( final PrintStream stream, final int indent )
{
Interpreter.indentLine( stream, indent );
stream.println( "<WHILE>" );
this.getCondition().print( stream, indent + 1 );
this.getScope().print( stream, indent + 1 );
}
}