package org.nfunk.jep.function;

import java.util.Stack;
import org.nfunk.jep.ParseException;
import org.nfunk.jep.type.Complex;

public class ArcSineH extends PostfixMathCommand {
  public void run(Stack paramStack) throws ParseException {
    checkStack(paramStack);
    Object object = paramStack.pop();
    paramStack.push(asinh(object));
  }
  
  public Object asinh(Object paramObject) throws ParseException {
    if (paramObject instanceof Complex)
      return ((Complex)paramObject).asinh(); 
    if (paramObject instanceof Number) {
      double d1 = ((Number)paramObject).doubleValue();
      double d2 = Math.log(d1 + Math.sqrt(d1 * d1 + 1.0D));
      return new Double(d2);
    } 
    throw new ParseException("Invalid parameter type");
  }
}
