2 Copyright (C) 2015-2017 Carl Hetherington <cth@carlh.net>
4 This file is part of DCP-o-matic.
6 DCP-o-matic is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 DCP-o-matic is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
22 #include "image_filename_sorter.h"
23 #include <dcp/locale_convert.h>
24 #include <boost/filesystem.hpp>
25 #include <boost/optional.hpp>
31 using dcp::locale_convert;
32 using boost::optional;
36 ImageFilenameSorter::operator() (boost::filesystem::path a, boost::filesystem::path b)
38 auto an = extract_numbers (a);
39 auto bn = extract_numbers (b);
41 int const anl = an.length ();
42 int const bnl = bn.length ();
45 bn = string(anl - bnl, '0') + bn;
46 } else if (bnl > anl) {
47 an = string(bnl - anl, '0') + an;
54 ImageFilenameSorter::extract_numbers (boost::filesystem::path p)
57 auto const ps = p.filename().string();
58 for (size_t i = 0; i < ps.size(); ++i) {
59 if (isdigit (ps[i])) {