TotalDegreeCoefTermConsumer.cpp

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/* Frobby: Software for monomial ideal computations.
   Copyright (C) 2007 Bjarke Hammersholt Roune (www.broune.com)
 
   This program 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.
 
   This program 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 this program.  If not, see http://www.gnu.org/licenses/.
*/
#include "stdinc.h"
#include "TotalDegreeCoefTermConsumer.h"
 
#include "CoefBigTermConsumer.h"
#include "TermTranslator.h"
#include "Term.h"
 
TotalDegreeCoefTermConsumer::
TotalDegreeCoefTermConsumer(auto_ptr<CoefBigTermConsumer> consumer,
                            const TermTranslator& translator):
  _consumer(*consumer),
  _consumerOwner(consumer),
  _translator(translator) {
  ASSERT(_consumerOwner.get() != 0);
}
 
TotalDegreeCoefTermConsumer::
TotalDegreeCoefTermConsumer(CoefBigTermConsumer& consumer,
                            const TermTranslator& translator):
  _consumer(consumer),
  _translator(translator) {
}
 
void TotalDegreeCoefTermConsumer::consumeRing(const VarNames& names) {
  // Do nothing since taking the total degree discards the original
  // ring.
}
 
void TotalDegreeCoefTermConsumer::beginConsuming() {
}
 
void TotalDegreeCoefTermConsumer::consume(const mpz_class& coef,
                                          const Term& term) {
  ASSERT(term.getVarCount() == _translator.getVarCount());
  if (coef == 0)
    return;
 
  // Compute total degree using _tmp.
  _tmp = 0;
  for (size_t var = 0; var < term.getVarCount(); ++var)
    _tmp += _translator.getExponent(var, term);
 
  _poly.add(coef, _tmp);
}
 
void TotalDegreeCoefTermConsumer::doneConsuming() {
  _poly.feedTo(_consumer, true);
}