dmolony-DiskBrowser/src/com/bytezone/diskbrowser/visicalc/Sum.java

package com.bytezone.diskbrowser.visicalc;

class Sum extends ValueListFunction
{
  public Sum (Cell cell, String text)
  {
    super (cell, text);

    assert text.startsWith ("@SUM(") : text;
  }

  @Override
  public void calculate ()
  {
    value = 0;
    valueResult = ValueResult.VALID;

    for (Value v : list)
    {
      v.calculate ();

      if (v.getValueResult () == ValueResult.NA)
        continue;

      if (!v.isValid ())
      {
        valueResult = v.getValueResult ();
        return;
      }

      value += v.getDouble ();
    }
  }
}