[Coin-discuss] adding constraints incrementally to OsiSolverInterface

[J P Fasano]

> I think the problem in the
> CoinPackedMatrix is copied to the internal
> Clp representation, and the
> extraGap and extraMajor information in the
> CoinPackedMatrix is not copied
> into this internal representation (which seems to be of
> class ClpPackedMatrix
> rather than CoinPackedMatrix).

That sounds correct.
If you don't want the OSI to copy the CoinPackedMatrix but
rather assume ownership of the CoinPackedMatrix, then use
the assignProblem method instead of loadProblem.

void OsiSolverInterface::assignProblem(
            CoinPackedMatrix *& matrix,
            double *&   collb
            double *&   colub,
            double *&   obj,
            double *&   rowlb,
            double *&   rowub );
http://www.coin-or.org/Doxygen/Osi/class_osi_solver_interface.html#z124_1

It might be the case that OsiClp will construct a ClpPackedMatrix.

JP