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/*
Copyright (C) 2023 Carl Hetherington <cth@carlh.net>
This file is part of DCP-o-matic.
DCP-o-matic 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 2 of the License, or
(at your option) any later version.
DCP-o-matic 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 DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
*/
#include "dcpomatic_assert.h"
/** Comparator to allow dcpomatic::Font::Content to be compared for use in a map */
struct FontComparator
{
bool operator()(dcpomatic::Font::Content const& a, dcpomatic::Font::Content const& b) const {
auto const a_has_file = static_cast<bool>(a.file);
auto const b_has_file = static_cast<bool>(b.file);
auto const a_has_data = static_cast<bool>(a.data);
auto const b_has_data = static_cast<bool>(b.data);
if (!a_has_file && !a_has_data && !b_has_file && !b_has_data) {
/* Neither font has any font data: a == b */
return false;
} else if (!a_has_file && !a_has_data) {
/* Fonts with no data are the "lowest": a < b */
return true;
} else if (!b_has_file && !b_has_data) {
/* ... so here b < a */
return false;
} else if (a_has_file && !b_has_file) {
/* Fonts with file are lower than fonts with data: a < b */
return true;
} else if (!a_has_file && b_has_file) {
/* ... so here b < a */
return false;
} else if (a_has_file && b_has_file) {
/* Compared as "equals" */
return a.file->string() < b.file->string();
} else if (a_has_data && b_has_data) {
/* Compared as "equals" */
auto const a_size = a.data->size();
auto const b_size = b.data->size();
if (a_size != b_size) {
return a_size < b_size;
}
return memcmp(a.data->data(), b.data->data(), a_size) < 0;
}
/* Should never get here */
DCPOMATIC_ASSERT(false);
return false;
};
};
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