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# Copyright 2009, 2011 Kevin Ryde.
# MyStuff.pm is shared by various distributions.
#
# MyStuff.pm is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by the
# Free Software Foundation; either version 3, or (at your option) any later
# version.
#
# MyStuff.pm is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
# for more details.
#
# You should have received a copy of the GNU General Public License along
# with this file. If not, see <http://www.gnu.org/licenses/>.
package MyStuff;
use 5.010;
use strict;
use warnings;
use Text::Tabs;
#my $verbose = 0;
sub line_at_pos {
my ($str, $pos) = @_;
my $start = (rindex ($str, "\n", $pos) || -1) + 1;
my $end = (index ($str, "\n", $pos) || length($str)-1) + 1;
return substr($str, $start, $end - $start);
}
sub pos_to_line_and_column {
my ($str, $pos) = @_;
$str = substr ($str, 0, $pos);
my $nlpos = rindex ($str, "\n");
my $lastline = substr ($str, $nlpos+1);
$lastline = Text::Tabs::expand ($lastline);
my $colnum = 1 + length ($lastline);
my $linenum = 1 + scalar($str =~ tr/\n//);
return ($linenum, $colnum);
}
package Iterator::Simple::FileUniq;
sub new {
my ($class, $it) = (shift, shift);
my $fu = FileUniq->new (@_);
return Iterator::Simple::iterator
(sub {
my $filename;
while (defined (my $filename = $it->next)) {
last if $fu->uniq ($filename);
}
});
}
package Locator;
sub new {
my ($class, @args) = @_;
open my $fh, '-|', 'locate', '-0', '--', @args or die;
return bless { fh => $fh,
}, $class;
}
sub next {
my ($self) = @_;
my $fh = $self->{'fh'};
my $filename;
{
local $/ = "\0";
$filename = <$fh>;
if (defined $filename) {
chomp $filename;
}
}
return $filename;
}
package Locator::BinScripts;
sub new {
my ($class, $type) = @_;
return bless { 'type' => $type,
'locator' => Locator->new ('/bin/*',
'/usr/bin/*',
'/usr/local/bin/*',
'/usr/local/bin2/*',
) }, $class;
}
sub next {
my ($self) = @_;
my $type = $self->{'type'};
for (;;) {
my $filename = $self->{'locator'}->next // return undef;
my ($fh, $buf);
if (open($fh,'<',$filename)
&& read($fh,$buf,80)
&& $buf =~ m{^#![a-z0-9/]*/$type([ \t]|$)}) {
return $filename;
}
}
}
package Locator::Concat;
sub new {
my ($class, @locators) = @_;
return bless { 'locators' => \@locators }, $class;
}
sub next {
my ($self) = @_;
my $locators = $self->{'locators'};
for (;;) {
@$locators or return undef;
my $filename = $locators->[0]->next;
if (defined $filename) { return $filename; }
shift @$locators;
}
}
1;
__END__
my @files = split /\n/, `locate \*.t \*.pm \*.pl`;
@files = grep {-f $_} @files;
@files = uniq_by_func (\&stat_dev_ino, @files);
sub uniq_by_func {
my $func = shift;
my %seen;
return grep { $seen{$func->($_)}++ == 0 } @_;
}
sub stat_dev_ino {
my ($filename) = @_;
my ($dev, $ino) = stat ($filename);
return "$dev,$ino";
}
print "look at ",scalar(@files)," files\n";
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