SLUFactor::Status SLUFactor::change(
int idx,
const SVector& subst,
const SSVector* e)
{
METHOD( "SLUFactor::change()" );
// BH 2005-08-23: The boolean usetup indicates that an "update vector"
// has been set up. I suppose that SSVector forest is this
// update vector, which is set up by solveRight4update() and
// solve2right4update() in order to optimize the basis update.
if (usetup)
{
if (l.updateType == FOREST_TOMLIN) // FOREST_TOMLIN updates
{
// BH 2005-08-19: The size of a SSVector is the size of the
// index set, i.e. the number of nonzeros which is only
// defined if the SSVector is set up. Since
// SSVector::altValues() calls unSetup() the size needs to be
// stored before the following call.
int fsize = forest.size(); // see altValues()
forestUpdate(idx, forest.altValues(), fsize, forest.altIndexMem());
forest.setSize(0);
forest.forceSetup();
}
else
{
assert(l.updateType == ETA);
changeEta(idx, eta);
}
}
else if (e != 0) // ETA updates
{
l.updateType = ETA;
updateNoClear(idx, e->values(), e->indexMem(), e->size());
l.updateType = uptype;
}
else if (l.updateType == FOREST_TOMLIN) // FOREST_TOMLIN updates
{
assert(0); // probably this part is never called.
// forestUpdate() with the last parameter set to NULL should fail.
forest = subst;
CLUFactor::solveLright(forest.altValues());
forestUpdate(idx, forest.altValues(), 0, 0);
forest.setSize(0);
forest.forceSetup();
}
else // ETA updates
{
assert(l.updateType == ETA);
vec = subst;
eta.clear();
CLUFactor::solveRight(eta.altValues(), vec.get_ptr());
changeEta(idx, eta);
}
usetup = false;
MSG_DEBUG( spxout << "DSLUFA01\tupdated\t\tstability = " << stability()
<< std::endl; )
return status();
std::string StalkPart::describe() const
{
std::stringstream ss;
ss << "Stalk: " << name() << ", Stability: " << stability();
return ss.str();
}
/**
* Returns true if this version is available (as in: can be installed)
* and false if not.
*/
bool PortagePackageVersion::isAvailable() const
{
//TODO: remove x86 and get arch it from the PortageSettings
return (stability("x86") == Stable);
}
