NAME

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

SYNOPSIS

pflow [-indent=8] [-dups] *.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.

SEE ALSO

CallGraph, CallGraph::Node, CallGraph::Dumper, CallGraph::Lang::Fortran. 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.