void writeBnbStatus(EnvPtr env, BranchAndBound *bab, double obj_sense)
{
const std::string me("qg: ");
int err = 0;
if (bab) {
env->getLogger()->msgStream(LogInfo)
<< me << std::fixed << std::setprecision(4)
<< "best solution value = " << obj_sense*bab->getUb() << std::endl
<< me << std::fixed << std::setprecision(4)
<< "best bound estimate from remaining nodes = "
<< obj_sense*bab->getLb() << std::endl
<< me << "gap = " << std::max(0.0,bab->getUb() - bab->getLb())
<< std::endl
<< me << "gap percentage = " << bab->getPerGap() << std::endl
<< me << "time used (s) = " << std::fixed << std::setprecision(2)
<< env->getTime(err) << std::endl
<< me << "status of branch-and-bound: "
<< getSolveStatusString(bab->getStatus()) << std::endl;
env->stopTimer(err); assert(0==err);
} else {
env->getLogger()->msgStream(LogInfo)
<< me << std::fixed << std::setprecision(4)
<< "best solution value = " << INFINITY << std::endl
<< me << std::fixed << std::setprecision(4)
<< "best bound estimate from remaining nodes = " << INFINITY << std::endl
<< me << "gap = " << INFINITY << std::endl
<< me << "gap percentage = " << INFINITY << std::endl
<< me << "time used (s) = " << std::fixed << std::setprecision(2)
<< env->getTime(err) << std::endl
<< me << "status of branch-and-bound: "
<< getSolveStatusString(NotStarted) << std::endl;
env->stopTimer(err); assert(0==err);
}
}
