#
# This software is Copyright 2005 by Elsevier Inc.  You may use it
# under the terms of the license at http://perl.plover.com/hop/LICENSE.txt .
#



###
### dir_walk_callbacks_defaults
###

## Chapter 1 section 5

sub dir_walk {
  my ($top, $filefunc, $dirfunc) = @_;
  my $DIR;

  if (-d $top) {
    my $file;
    unless (opendir $DIR, $top) {
      warn "Couldn't open directory top: $!; skipping.\n";
      return;
    }

    my @results;
    while ($file = readdir $DIR) {
      next if $file eq '.' || $file eq '..';
      push @results, dir_walk("$top/$file", $filefunc, $dirfunc);
    }
    return $dirfunc ? $dirfunc->($top, @results) : () ;
  } else {
    return $filefunc ? $filefunc->($top): () ;
  }
}