// (C) Uri Wilensky. https://github.com/NetLogo/NetLogo
package org.nlogo.prim.etc;
import org.nlogo.api.I18N;
import org.nlogo.api.LogoException;
import org.nlogo.api.Syntax;
import org.nlogo.nvm.Context;
import org.nlogo.nvm.EngineException;
import org.nlogo.nvm.Pure;
import org.nlogo.nvm.Reporter;
public final strictfp class _ln extends Reporter implements Pure {
@Override
public Syntax syntax() {
int[] right = {Syntax.NumberType()};
return Syntax.reporterSyntax(right, Syntax.NumberType());
}
@Override
public Object report(Context context) throws LogoException {
return report_1(context, argEvalDoubleValue(context, 0));
}
public double report_1(Context context, double d) throws LogoException {
if (d <= 0) {
throw new EngineException(context, this,
I18N.errorsJ().getN("org.nlogo.prim.etc.$common.cantTakeLogarithmOf", d));
}
return validDouble(StrictMath.log(d));
}
}