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aka_optimize.cc
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Tue, Nov 19, 07:50

aka_optimize.cc
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/**
* @file aka_optimize.cc
*
* @author Alejandro M. Aragón <alejandro.aragon@epfl.ch>
*
* @date creation: Fri Jan 04 2013
* @date last modification: Tue May 13 2014
*
* @brief Objects that can be used to carry out optimization
*
* @section LICENSE
*
* Copyright (©) 2014 EPFL (Ecole Polytechnique Fédérale de Lausanne)
* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
*
* Akantu is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free
* Software Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* Akantu 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 Lesser General Public License for more
* details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with Akantu. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "aka_common.hh"
#include "aka_optimize.hh"
__BEGIN_AKANTU__
std::ostream& operator<<(std::ostream& os, nlopt::result r) {
switch (r) {
case 1:
os<<"NLOPT_SUCCESS: Generic success return value."<<endl;
break;
case 2:
os<<"NLOPT_STOPVAL_REACHED: Optimization stopped because stopval (above) was reached."<<endl;
break;
case 3:
os<<"NLOPT_FTOL_REACHED: Optimization stopped because ftol_rel or ftol_abs (above) was reached."<<endl;
break;
case 4:
os<<"NLOPT_XTOL_REACHED: Optimization stopped because xtol_rel or xtol_abs (above) was reached."<<endl;
break;
case 5:
os<<"NLOPT_MAXEVAL_REACHED: Optimization stopped because maxeval (above) was reached."<<endl;
break;
case 6:
os<<"NLOPT_MAXTIME_REACHED: Optimization stopped because maxtime (above) was reached."<<endl;
break;
case -1:
os<<"NLOPT_FAILURE: Generic failure code."<<endl;
break;
case -2:
os<<"NLOPT_INVALID_ARGS: Invalid arguments (e.g. lower bounds are bigger than upper bounds, an unknown algorithm was specified, etc.)"<<endl;
break;
case -3:
os<<"NLOPT_OUT_OF_MEMORY: Ran out of memory."<<endl;
break;
case -4:
os<<"NLOPT_ROUNDOFF_LIMITED: Halted because roundoff errors limited progress. (In this case, the optimization still typically returns a useful result."<<endl;
break;
case -5:
os<<"NLOPT_FORCED_STOP: Halted because of a forced termination: the user called nlopt_force_stop(opt) on the optimization’s nlopt_opt object opt from the user’s objective function or constraints."<<endl;
break;
default:
os<<"*** ERROR *** Unrecognized optimization code."<<endl;
exit(1);
}
return os;
}
__END_AKANTU__

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