Giving up isn't my deal :)

#!/usr/bin/perl 

# Script to add comments for Natural Doc. http://www.naturaldoc.org

use strict;
use warnings;

use Tie::File;

use Data::Dumper;

if (@ARGV < 1) {
    print "Usage: app file";
    exit(0);
}

my $file;
open $file, $ARGV[0] or die $!;
my $data = join("", <$file>);
close $file;

my $data_with_comment = "";
my @matches;

while ( $data =~ /\n((?:\w+\*?\*?\s+)+) (\*?\w+\s*) \s* \((.*?) \) (\s
+*\{)/gsx ) {
    push(@matches, { 'fullmatch' => $&, 'functype' => $1, 'funcname' =
+> $2, 'funcargs' => $3 });
}

foreach (@matches) {

    my $fullmatch = $_->{'fullmatch'};
    my $functype  = $_->{'functype'};
    my $funcname  = $_->{'funcname'};
    my $funcargs  = $_->{'funcargs'};

    my $comment = "";
    my @funcargs = split /,\s*/, $funcargs;

    my $args  =  join( ", ", @funcargs );
    my $args2 =  join( "\n *  ", @funcargs );
    $comment .= qq {
/* Function: $funcname($args)
 *
 * 
 *
 * Arguments:
 *  $args2
 *
 * Returns:
 *  $functype
 *
 */ };
    $data =~ s/\Q$fullmatch\E/$comment$fullmatch/;
}

print $data;
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This works for me atleast.