pflow - command line utility for printing the call graph of a fortran program

NAME

pflow - command line utility for printing the call graph of a fortran program

SYNOPSIS

    pflow [-indent=8] [-dups=0] [-type=tree] *.f

DESCRIPTION

This is a simplified Perl version of the FLOW program http://www.netlib.org/floppy/contents.html#link13. It takes Fortran 77 source code and prints a call graph.

The output looks something like this:

    MAIN
            EXTSUB *
    1       SUB1
                    SUB11
                    SUB12
            SUB2
                    SUB1 (1)
                    SUB21

This means that MAIN calls EXTSUB, which is labeled with an asterisk because it is external (meaning it is not defined within the program that was parsed), SUB1, and SUB2. SUB1 calls SUB11 and SUB12. SUB2 calls SUB1; to avoid duplication, a link is made by labeling SUB1 with a 1. This is the default behavior, with 'dups' => 0. When dups => 1, the branch is duplicated:

    MAIN
            EXTSUB *
            SUB1
                    SUB11
                    SUB12
            SUB2
                    SUB1
                            SUB11
                            SUB12
                    SUB21

In case of recursion, the label system is used even with dups => 1, to avoid an endless loop.

OPTIONS

indent

The number of spaces to indent each call level. The default is 8.
dups
If true, duplicate a branch that has already been called. If false, place a level pointing to the first place where the branch was defined. The default is false.

type
Specify which type of dump should be used. There are several options:
tree
The default; print a call tree (like the examples shown in the DESCRIPTION section.

forward
Print one subroutine per line, followed by the list of all the subroutines that it calls.

reverse
Print one subroutines per line, followed by the list of all the subroutines that call it.

VERSION

0.55

SEE ALSO

the CallGraph manpage, the CallGraph::Node manpage, the CallGraph::Dumper manpage, the CallGraph::Lang::Fortran manpage. The FLOPPY and FLOW user's guide at http://www.netlib.org/floppy/contents.html.

AUTHOR

Ivan Tubert <itub@cpan.org>

COPYRIGHT

Copyright (c) 2004 Ivan Tubert. All rights reserved. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

 pflow - command line utility for printing the call graph of a fortran program