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73 lines
1.8 KiB
73 lines
1.8 KiB
/*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <onerow/single_row_cut_generator.hpp>
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SingleRowCutGenerator::SingleRowCutGenerator(Row &r) : row(r)
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{
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}
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#define return_if_neq(a,b) if((a)<(b)) return true; if((a)>(b)) return false;
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bool Constraint::operator<(const Constraint &other) const
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{
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return_if_neq(pi.nz(), other.pi.nz());
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return_if_neq(pi_zero, other.pi_zero);
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int nz = pi.nz();
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for (int i = 0; i < nz; i++)
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{
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return_if_neq(pi.index(i), other.pi.index(i));
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return_if_neq(pi.value(i), other.pi.value(i));
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}
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return false;
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}
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bool Constraint::operator==(const Constraint &other) const
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{
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return !(operator<(other) || other.operator<(*this));
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}
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rational Constraint::get_violation(const rational *x)
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{
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rational v(0);
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int nz = pi.nz();
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for (int i = 0; i < nz; i++)
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v += pi.value(i) * x[pi.index(i)];
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v -= pi_zero;
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return v;
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}
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std::ostream& operator<<(std::ostream& os, const Constraint &c)
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{
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int nz = c.pi.nz();
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for (int k = 0; k < nz; k++)
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{
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os << c.pi.value(k) << " x" << c.pi.index(k) << " ";
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}
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os << "<= " << c.pi_zero;
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return os;
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}
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std::ostream& operator<<(std::ostream& os, const Row &r)
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{
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os << "[" << r.basic_var_index << "] " << r.c;
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return os;
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}
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