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// Copyright 2008, 2009 Brady J. Garvin
// This file is part of Covering Arrays by Simulated Annealing (CASA).
// CASA 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 of the License, or
// (at your option) any later version.
// CASA 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 CASA. If not, see <http://www.gnu.org/licenses/>.
#include <cmath>
#include <algorithm>
#include <functional>
#include "annealing/Bounds.H"
using namespace std;
#ifndef UPPER_BOUND_SCALING_FACTOR
#define UPPER_BOUND_SCALING_FACTOR 5
#endif
unsigned computeLowerBound(unsigned strength, const Options&options) {
if (lowerBound) {
return lowerBound;
}
static greater<unsigned>backwards;
unsigned result = 1;
Array<unsigned>symbolCounts(options.getSize());
for (unsigned i = symbolCounts.getSize(); i--;) {
symbolCounts[i] = options.getSymbolCount(i);
}
partial_sort
(symbolCounts + 0,
symbolCounts + strength,
symbolCounts + symbolCounts.getSize(),
backwards);
for (unsigned i = strength; i--;) {
result *= symbolCounts[i];
}
return result;
}
unsigned computeUpperBound(unsigned strength, const Options&options) {
if (upperBound) {
return upperBound;
}
unsigned max = 0;
Array<unsigned>symbolCounts(options.getSize());
for (unsigned i = symbolCounts.getSize(); i--;) {
unsigned candidate = options.getSymbolCount(i);
if (candidate > max) {
max = candidate;
}
}
return (unsigned)(UPPER_BOUND_SCALING_FACTOR *
pow((double)max, (double)strength));
}
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