how to tell forwarder to wait for a cr/nl

Hi,

I have a logfile which is single-line and well structured, but the feed doesn't always write out entire lines. I might get 10 lines (with cr/lf) and then half a line, until the next "batch" of data comes in. As a result, I'm getting events with only half of the data sometimes. How do i tell the forwarder to wait until a cr/lf comes in, and don't process it until that happens?