extract part of fints

Hi,

I have a fints object called x1, containing a column of dates and one column of values. I want to extract the following dates:

tmp=x1('03/31/1995::06/30/2014');

However, I can't be sure that x1 actually contains data from 1995q1 to 2014q2. So I want to do the following:

If x1 covers a longer time period, then only extract 1995q1 - 2014q2. If x1 covers a shorter time period, then replace all the missing values by 0.

Any ideas? Thanks!