fsplit takes as input either a file or standard input containing Fortran source code. It attempts to split the input into separate routine files of the form
name.f, where
name is the name of the program unit (e.g. function, subroutine, block data or program). The name for unnamed block data subprograms has the form
blkdtaNNN.f where NNN is three digits and a file of this name does not already exist. For unnamed main programs the name has the form
mainNNN.f. If there is an error in classifying a program unit, or if
name.f already exists, the program unit will be put in a file of the form
zzzNNN.f where
zzzNNN.f does not already exist.
-e efile
Normally each subprogram unit is split into a separate file. When the
-e option is used, only the specified subprogram units are split into separate files. E.g.:
fsplit -e readit -e doit prog.f
will split readit and doit into separate files.