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/>.
21 #include "image_filename_sorter.h"
22 #include <dcp/locale_convert.h>
23 #include <boost/filesystem.hpp>
24 #include <boost/foreach.hpp>
25 #include <boost/optional.hpp>
30 using dcp::locale_convert;
31 using boost::optional;
34 ImageFilenameSorter::operator() (boost::filesystem::path a, boost::filesystem::path b)
36 optional<int> na = extract_numbers (a);
37 optional<int> nb = extract_numbers (b);
39 return a.string() < b.string();
46 ImageFilenameSorter::extract_numbers (boost::filesystem::path p)
49 string const ps = p.leaf().string();
50 for (size_t i = 0; i < ps.size(); ++i) {
51 if (isdigit (ps[i])) {
56 if (numbers.empty ()) {
57 return optional<int> ();
60 /* locale_convert is quicker than raw_convert and numbers can only contain
61 things which are isdigit() so locale_convert is fine to use.
63 return locale_convert<int> (numbers);