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/* Copyright 2023 Yann ORLAREY
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <algorithm>
#include <functional>
#include <random>
#include "check.hh"
#include "interval_algebra.hh"
#include "interval_def.hh"
namespace itv {
//------------------------------------------------------------------------------------------
// Interval Ne
// interval Ne(const interval& x, const interval& y);
// void testNe();
interval interval_algebra::Ne(const interval& x, const interval& y)
{
if (x.isEmpty() || y.isEmpty()) {
return empty();
}
if ((x.hi() < y.lo()) || x.lo() > y.hi()) {
return interval{1, 1, 0};
}
if ((x.hi() == y.hi() && x.lo() == y.lo()) && x.lo() == y.hi()) {
return interval{0, 0, 0};
}
return {0, 1, 0};
}
void interval_algebra::testNe()
{
check("test algebra Ne", Ne(interval(0, 5), interval(-3, 10)), interval(0, 1));
check("test algebra Ne", Ne(interval(0, 5), interval(8, 10)), interval(1));
check("test algebra Ne", Ne(interval(0, 0), interval(0, 0)), interval(0));
}
} // namespace itv
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