variable length fields

[Leo Kirch]

hi

i've got the following problem with bison: imagine a text file by the 
structure of one line that tells us how many lines will follow and the 
following lines... ahm... sample:

  ......
  ......
  3                 // three lines will follow
  line1            // the first line...
  line2
  line3            //the last line..
  2
  anotherline1
  anotherline2
  ....
  ...

and so on. but how do i tell bison to remember (3) and then read exactly the 
next three lines?

hope that wasnt too confusing

thanks a lot
sebastian