lpi_qso.c
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23 /*--+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8----+----9----+----0----+----1----+----2*/
32 typedef SCIP_DUALPACKET COLPACKET; /* each column needs two bits of information (basic/on_lower/on_upper) */
34 typedef SCIP_DUALPACKET ROWPACKET; /* each row needs two bit of information (basic/on_lower/on_upper) */
98 /** This macro is to print error messages and jump to the given point in the code, it also prints the
113 /** Return value macro, if the value is non-zero, write to standard error the returning code and
114 * where this happened, and return SCIP_ERROR, otherwise return normal SCIP_OKAY termination code. */
123 /** Return value macro, if the value is non-zero, write to standard error the returning code and
388 return "Linear Programming Solver developed by D. Applegate, W. Cook, S. Dash, and M. Mevenkamp (www.isye.gatech.edu/~wcook/qsopt)";
599 QS_CONDRET( QSadd_ranged_rows(lpi->prob, nrows, lpi->ircnt, lpi->irbeg, 0, 0, lpi->irhs, lpi->isen, lpi->irng, (const char**)rownames) );
618 QS_CONDRET( QSadd_cols(lpi->prob, ncols, lpi->iccnt, (int*) beg, (int*) ind, (SCIP_Real*) val, (SCIP_Real*) obj,
701 QS_CONDRET( QSadd_cols(lpi->prob, ncols, lpi->iccnt, (int*) lbeg, (int*) ind, (SCIP_Real*) val, (SCIP_Real*) obj,
742 /** deletes columns from SCIP_LP; the new position of a column must not be greater that its old position */
844 QS_CONDRET( QSadd_ranged_rows(lpi->prob, nrows, lpi->ircnt, (int*) beg, (int*) ind, (SCIP_Real*) val, lpi->irhs,
856 QS_CONDRET( QSadd_ranged_rows(lpi->prob, nrows, lpi->ircnt, lpi->irbeg, (int*) ind, (SCIP_Real*) val, lpi->irhs,
868 char** colnames, /**< pointers to column names (of size at least lastcol-firstcol+1) or NULL if namestoragesize is zero */
871 int* storageleft /**< amount of storage left (if < 0 the namestorage was not big enough) or NULL if namestoragesize is zero */
931 char** rownames, /**< pointers to row names (of size at least lastrow-firstrow+1) or NULL if namestoragesize is zero */
933 int namestoragesize, /**< size of namestorage (if 0, -storageleft returns the storage needed) */
934 int* storageleft /**< amount of storage left (if < 0 the namestorage was not big enough) or NULL if namestoragesize is zero */
1016 /** deletes rows from SCIP_LP; the new position of a row must not be greater that its old position */
1250 /** multiplies a row with a non-zero scalar; for negative scalars, the row's sense is switched accordingly */
1273 rval = QSget_ranged_rows_list(lpi->prob, 1, rowlist, &rowcnt, &rowbeg, &rowind, &rowval, &rhs, &sense, &range, 0);
1351 /** multiplies a column with a non-zero scalar; the objective value is multiplied with the scalar, and the bounds
1380 rval = QSget_columns_list(lpi->prob, 1, collist, &colcnt, &colbeg, &colind, &colval, &obj, &lb, &ub, 0);
1499 /** gets columns from LP problem object; the arrays have to be large enough to store all values
1529 assert((nnonz != NULL && beg != NULL && ind != NULL && val != NULL) || (nnonz == NULL && beg == NULL && ind == NULL && val == NULL));
1541 rval = QSget_columns_list(lpi->prob, len, lpi->iccnt, nnonz ? (&lcnt) : 0, nnonz ? (&lbeg) : 0, nnonz ? (&lind) : 0,
1631 assert((nnonz != NULL && beg != NULL && ind != NULL && val != NULL) || (nnonz == NULL && beg == NULL && ind == NULL && val == NULL));
1641 rval = QSget_ranged_rows_list(lpi->prob, len, lpi->ircnt, nnonz ? (&lcnt) : 0, nnonz ? (&lbeg) : 0, nnonz ? (&lind) : 0,
1770 /* There seems to be a bug in qsopt: The function QSget_obj_list might return values for slack variables. We
1776 QS_CONDRET( QSget_columns_list(lpi->prob, len, lpi->iccnt, NULL, NULL, NULL, NULL, &qsoptvals, NULL, NULL, NULL) );
1842 rval = QSget_ranged_rows_list(lpi->prob, len, lpi->ircnt, 0, 0, 0, 0, &lrhs, &lsense, &lrng, 0);
1922 SCIPdebugMessage("calling QSopt primal simplex: %d cols, %d rows, %d nz\n", QSget_colcount(lpi->prob),
1939 SCIPdebugMessage("calling QSopt dual simplex: %d cols, %d rows, %d nz\n", QSget_colcount(lpi->prob),
1948 /** calls barrier or interior point algorithm to solve the LP with crossover to simplex basis */
2008 SCIPdebugMessage("calling QSopt strong branching on variable %d with fractional value (%d it lim)\n", col, itlim);
2056 SCIPdebugMessage("calling QSopt strong branching on %d variables with fractional value (%d it lim)\n", ncols, itlim);
2067 QS_CONDRET( QSopt_strongbranch(lpi->prob, ncols, cols, psols, down, up, itlim, QS_MAXDOUBLE) );
2102 SCIPdebugMessage("calling QSopt strong branching on variable %d with integral value (%d it lim)\n", col, itlim);
2106 /* QSopt cannot directly strong branch on integral values! We thus return the current objective
2148 SCIPdebugMessage("calling QSopt strong branching on %d variables with integral value (%d it lim)\n", ncols, itlim);
2150 /* QSopt cannot directly strong branch on integral values! We thus return the current objective
2193 * The feasibility information is with respect to the last solving call and it is only relevant if SCIPlpiWasSolved()
2196 * Note that @a primalfeasible and @a dualfeasible should only return true if the solver has proved the respective LP to
2197 * be feasible. Thus, the return values should be equal to the values of SCIPlpiIsPrimalFeasible() and
2198 * SCIPlpiIsDualFeasible(), respectively. Note that if feasibility cannot be proved, they should return false (even if
2215 if( lpi->solstat == QS_LP_OPTIMAL || (lpi->algo == LPI_QSOPT_ALGO_PRIMAL && lpi->solstat == QS_LP_UNBOUNDED) )
2220 if( lpi->solstat == QS_LP_OPTIMAL || (lpi->algo == LPI_QSOPT_ALGO_DUAL && lpi->solstat == QS_LP_INFEASIBLE) || lpi->solstat == QS_LP_OBJ_LIMIT )
2228 /** returns TRUE iff LP is proven to have a primal unbounded ray (but not necessary a primal feasible point);
2243 /** returns TRUE iff LP is proven to have a primal unbounded ray (but not necessary a primal feasible point),
2300 /** returns TRUE iff LP is proven to have a dual unbounded ray (but not necessary a dual feasible point);
2315 /** returns TRUE iff LP is proven to have a dual unbounded ray (but not necessary a dual feasible point),
2366 return ( lpi->solstat == QS_LP_OPTIMAL || (lpi->algo == LPI_QSOPT_ALGO_DUAL && lpi->solstat == QS_LP_INFEASIBLE) || lpi->solstat == QS_LP_OBJ_LIMIT );
2384 * This function should return true if the solution is reliable, i.e., feasible and optimal (or proven
2385 * infeasible/unbounded) with respect to the original problem. The optimality status might be with respect to a scaled
2386 * version of the problem, but the solution might not be feasible to the unscaled original problem; in this case,
2453 /** tries to reset the internal status of the LP solver in order to ignore an instability of the last solving call */
2490 * Before calling this function, the caller must ensure that the LP has been solved to optimality, i.e., that
2510 /* Do nothing if the status is not optimal, e.g., if we reached the objective limit or the problem is
2574 SCIPerrorMessage("stat col[%d] = %c, rd[%d] = %lg sense %d\n", i, icstat[i], i, redcost[i] * sense, sense);
2582 SCIPerrorMessage("stat col[%d] = %c, rd[%d] = %lg sense %d\n", i, icstat[i], i, redcost[i] * sense, sense);
2590 SCIPerrorMessage("stat col[%d] = %c, rd[%d] = %lg sense %d\n", i, icstat[i], i, redcost[i] * sense, sense);
2596 SCIPerrorMessage("unknown stat col[%d] = %c, rd[%d] = %lg\n", i, icstat[i], i, redcost[i] * sense);
2632 SCIPdebugMessage("calling QSopt dual Farkas: %d cols, %d rows, %d non zeros\n", QSget_colcount (lpi->prob),
2662 * Such information is usually only available, if also a (maybe not optimal) solution is available.
2663 * The LPI should return SCIP_INVALID for @p quality, if the requested quantity is not available.
2691 /** gets current basis status for columns and rows; arrays must be large enough to store the basis status */
2861 /** returns the indices of the basic columns and rows; basic column n gives value n, basic row m gives value -1-m */
2901 * @note The LP interface defines slack variables to have coefficient +1. This means that if, internally, the LP solver
2902 * uses a -1 coefficient, then rows associated with slacks variables whose coefficient is -1, should be negated;
2926 SCIPdebugMessage("getting binv-row %d from Qsopt %d cols, %d rows, %d nonz\n", r, QSget_colcount(lpi->prob),
2943 * @note The LP interface defines slack variables to have coefficient +1. This means that if, internally, the LP solver
2944 * uses a -1 coefficient, then rows associated with slacks variables whose coefficient is -1, should be negated;
2974 * @note The LP interface defines slack variables to have coefficient +1. This means that if, internally, the LP solver
2975 * uses a -1 coefficient, then rows associated with slacks variables whose coefficient is -1, should be negated;
2983 const SCIP_Real* binvrow, /**< row in (A_B)^-1 from prior call to SCIPlpiGetBInvRow(), or NULL */
3022 * @note The LP interface defines slack variables to have coefficient +1. This means that if, internally, the LP solver
3023 * uses a -1 coefficient, then rows associated with slacks variables whose coefficient is -1, should be negated;
3081 SCIPdebugMessage("storing QSopt LPI state in %p (%d cols, %d rows)\n", (void*)*lpistate, ncols, nrows);
3096 /** loads LPi state (like basis information) into solver; note that the LP might have been extended with additional
3128 SCIPdebugMessage("loading LPI state %p (%d cols, %d rows) into QSopt LP with %d cols and %d rows\n", (void*)lpistate, lpistate->ncols,
3385 QS_CONDRET( QSget_basis_and_row_norms_array(lpi->prob, (*lpinorms)->cstat, (*lpinorms)->rstat, (*lpinorms)->norms) );
3397 /** loads LPi pricing norms into solver; note that the LP might have been extended with additional
3422 QS_CONDRET( QSload_basis_and_row_norms_array(lpi->prob, lpinorms->cstat, lpinorms->rstat, lpinorms->norms) );
3555 /* The maximum number of pivots allowed in the algorithm can be set with the QS_PARAM_SIMPLEX_MAX_ITERATIONS parameter.
SCIP_RETCODE SCIPlpiCreate(SCIP_LPI **lpi, SCIP_MESSAGEHDLR *messagehdlr, const char *name, SCIP_OBJSEN objsen)
Definition: lpi_qso.c:448
static void lpistatePack(SCIP_LPISTATE *lpistate, const int *cstat, const int *rstat)
Definition: lpi_qso.c:169
SCIP_RETCODE SCIPlpiSetIntpar(SCIP_LPI *lpi, SCIP_LPPARAM type, int ival)
Definition: lpi_qso.c:3505
static SCIP_RETCODE ensureColMem(SCIP_LPI *const lpi, int ncols)
Definition: lpi_qso.c:261
SCIP_RETCODE SCIPlpiStrongbranchesFrac(SCIP_LPI *lpi, int *cols, int ncols, SCIP_Real *psols, int itlim, SCIP_Real *down, SCIP_Real *up, SCIP_Bool *downvalid, SCIP_Bool *upvalid, int *iter)
Definition: lpi_qso.c:2029
static SCIP_RETCODE convertSides(SCIP_LPI *const lpi, int nrows, const double *const lhs, const double *const rhs)
Definition: lpi_qso.c:298
SCIP_RETCODE SCIPlpiGetIntpar(SCIP_LPI *lpi, SCIP_LPPARAM type, int *ival)
Definition: lpi_qso.c:3461
SCIP_RETCODE SCIPlpiSetNorms(SCIP_LPI *lpi, BMS_BLKMEM *blkmem, const SCIP_LPINORMS *lpinorms)
Definition: lpi_qso.c:3400
SCIP_RETCODE SCIPlpiGetDualfarkas(SCIP_LPI *lpi, SCIP_Real *dualfarkas)
Definition: lpi_qso.c:2623
SCIP_RETCODE SCIPlpiChgCoef(SCIP_LPI *lpi, int row, int col, SCIP_Real newval)
Definition: lpi_qso.c:1179
SCIP_RETCODE SCIPlpiGetBase(SCIP_LPI *lpi, int *cstat, int *rstat)
Definition: lpi_qso.c:2692
SCIP_RETCODE SCIPlpiGetObj(SCIP_LPI *lpi, int firstcol, int lastcol, SCIP_Real *vals)
Definition: lpi_qso.c:1744
SCIP_Bool SCIPlpiHasStateBasis(SCIP_LPI *lpi, SCIP_LPISTATE *lpistate)
Definition: lpi_qso.c:3279
Definition: type_lpi.h:41
void SCIPdecodeDualBit(const SCIP_DUALPACKET *inp, int *out, int count)
Definition: bitencode.c:299
interface methods for specific LP solvers
SCIP_RETCODE SCIPlpiSolveBarrier(SCIP_LPI *lpi, SCIP_Bool crossover)
Definition: lpi_qso.c:1949
SCIP_RETCODE SCIPlpiAddRows(SCIP_LPI *lpi, int nrows, const SCIP_Real *lhs, const SCIP_Real *rhs, char **rownames, int nnonz, const int *beg, const int *ind, const SCIP_Real *val)
Definition: lpi_qso.c:778
Definition: type_lpi.h:51
SCIP_Bool SCIPlpiIsInfinity(SCIP_LPI *lpi, SCIP_Real val)
Definition: lpi_qso.c:3680
Definition: type_lpi.h:75
SCIP_Bool SCIPlpiIsPrimalInfeasible(SCIP_LPI *lpi)
Definition: lpi_qso.c:2273
Definition: struct_message.h:36
SCIP_RETCODE SCIPlpiGetBInvACol(SCIP_LPI *lpi, int c, SCIP_Real *coef, int *inds, int *ninds)
Definition: lpi_qso.c:3028
SCIP_RETCODE SCIPlpiStartStrongbranch(SCIP_LPI *lpi)
Definition: lpi_qso.c:1961
SCIP_RETCODE SCIPlpiGetNorms(SCIP_LPI *lpi, BMS_BLKMEM *blkmem, SCIP_LPINORMS **lpinorms)
Definition: lpi_qso.c:3357
SCIP_RETCODE SCIPlpiDelRows(SCIP_LPI *lpi, int firstrow, int lastrow)
Definition: lpi_qso.c:989
Definition: type_lpi.h:50
static void lpistateUnpack(const SCIP_LPISTATE *lpistate, int *cstat, int *rstat)
Definition: lpi_qso.c:185
SCIP_RETCODE SCIPlpiGetCoef(SCIP_LPI *lpi, int row, int col, SCIP_Real *val)
Definition: lpi_qso.c:1884
SCIP_RETCODE SCIPlpiGetBInvCol(SCIP_LPI *lpi, int c, SCIP_Real *coef, int *inds, int *ninds)
Definition: lpi_qso.c:2949
Definition: lpi_qso.c:40
Definition: lpi_cpx.c:188
SCIP_RETCODE SCIPlpiLoadColLP(SCIP_LPI *lpi, SCIP_OBJSEN objsen, int ncols, const SCIP_Real *obj, const SCIP_Real *lb, const SCIP_Real *ub, char **colnames, int nrows, const SCIP_Real *lhs, const SCIP_Real *rhs, char **rownames, int nnonz, const int *beg, const int *ind, const SCIP_Real *val)
Definition: lpi_qso.c:536
Definition: type_lpi.h:52
Definition: type_lpi.h:73
static SCIP_RETCODE lpistateCreate(SCIP_LPISTATE **lpistate, BMS_BLKMEM *blkmem, int ncols, int nrows)
Definition: lpi_qso.c:201
SCIP_RETCODE SCIPlpiScaleCol(SCIP_LPI *lpi, int col, SCIP_Real scaleval)
Definition: lpi_qso.c:1354
SCIP_RETCODE SCIPlpiReadState(SCIP_LPI *lpi, const char *fname)
Definition: lpi_qso.c:3289
SCIP_RETCODE SCIPlpiStrongbranchFrac(SCIP_LPI *lpi, int col, SCIP_Real psol, int itlim, SCIP_Real *down, SCIP_Real *up, SCIP_Bool *downvalid, SCIP_Bool *upvalid, int *iter)
Definition: lpi_qso.c:1985
packing single and dual bit values
Definition: type_retcode.h:36
SCIP_RETCODE SCIPlpiGetSolFeasibility(SCIP_LPI *lpi, SCIP_Bool *primalfeasible, SCIP_Bool *dualfeasible)
Definition: lpi_qso.c:2201
SCIP_RETCODE SCIPlpiSetBase(SCIP_LPI *lpi, const int *cstat, const int *rstat)
Definition: lpi_qso.c:2777
SCIP_RETCODE SCIPlpiWriteLP(SCIP_LPI *lpi, const char *fname)
Definition: lpi_qso.c:3727
SCIP_RETCODE SCIPlpiGetRowNames(SCIP_LPI *lpi, int firstrow, int lastrow, char **rownames, char *namestorage, int namestoragesize, int *storageleft)
Definition: lpi_qso.c:927
Definition: type_lpi.h:34
SCIP_RETCODE SCIPlpiSetIntegralityInformation(SCIP_LPI *lpi, int ncols, int *intInfo)
Definition: lpi_qso.c:401
SCIP_RETCODE SCIPlpiChgObjsen(SCIP_LPI *lpi, SCIP_OBJSEN objsen)
Definition: lpi_qso.c:1199
SCIP_RETCODE SCIPlpiGetObjval(SCIP_LPI *lpi, SCIP_Real *objval)
Definition: lpi_qso.c:2472
Definition: type_lpi.h:44
SCIP_RETCODE SCIPlpiIgnoreInstability(SCIP_LPI *lpi, SCIP_Bool *success)
Definition: lpi_qso.c:2454
SCIP_RETCODE SCIPlpiDelCols(SCIP_LPI *lpi, int firstcol, int lastcol)
Definition: lpi_qso.c:714
Definition: lpi_qso.c:41
Definition: type_retcode.h:33
Definition: type_lpi.h:33
SCIP_RETCODE SCIPlpiGetSides(SCIP_LPI *lpi, int firstrow, int lastrow, SCIP_Real *lhss, SCIP_Real *rhss)
Definition: lpi_qso.c:1814
static SCIP_RETCODE ensureRowMem(SCIP_LPI *const lpi, int nrows)
Definition: lpi_qso.c:278
Definition: type_lpi.h:45
SCIP_RETCODE SCIPlpiChgSides(SCIP_LPI *lpi, int nrows, const int *ind, const SCIP_Real *lhs, const SCIP_Real *rhs)
Definition: lpi_qso.c:1137
SCIP_RETCODE SCIPlpiStrongbranchesInt(SCIP_LPI *lpi, int *cols, int ncols, SCIP_Real *psols, int itlim, SCIP_Real *down, SCIP_Real *up, SCIP_Bool *downvalid, SCIP_Bool *upvalid, int *iter)
Definition: lpi_qso.c:2123
SCIP_RETCODE SCIPlpiAddCols(SCIP_LPI *lpi, int ncols, const SCIP_Real *obj, const SCIP_Real *lb, const SCIP_Real *ub, char **colnames, int nnonz, const int *beg, const int *ind, const SCIP_Real *val)
Definition: lpi_qso.c:626
Definition: type_retcode.h:46
Definition: type_lpi.h:53
SCIP_RETCODE SCIPlpiFreeNorms(SCIP_LPI *lpi, BMS_BLKMEM *blkmem, SCIP_LPINORMS **lpinorms)
Definition: lpi_qso.c:3428
void SCIPencodeDualBit(const int *inp, SCIP_DUALPACKET *out, int count)
Definition: bitencode.c:229
SCIP_RETCODE SCIPlpiChgBounds(SCIP_LPI *lpi, int ncols, const int *ind, const SCIP_Real *lb, const SCIP_Real *ub)
Definition: lpi_qso.c:1086
Definition: type_lpi.h:71
public data structures and miscellaneous methods
SCIP_RETCODE SCIPlpiGetBInvARow(SCIP_LPI *lpi, int r, const SCIP_Real *binvrow, SCIP_Real *coef, int *inds, int *ninds)
Definition: lpi_qso.c:2980
SCIP_RETCODE SCIPlpiScaleRow(SCIP_LPI *lpi, int row, SCIP_Real scaleval)
Definition: lpi_qso.c:1251
Definition: type_lpi.h:74
Definition: type_lpi.h:70
SCIP_RETCODE SCIPlpiSetRealpar(SCIP_LPI *lpi, SCIP_LPPARAM type, SCIP_Real dval)
Definition: lpi_qso.c:3611
SCIP_RETCODE SCIPlpiGetBounds(SCIP_LPI *lpi, int firstcol, int lastcol, SCIP_Real *lbs, SCIP_Real *ubs)
Definition: lpi_qso.c:1785
SCIP_RETCODE SCIPlpiGetCols(SCIP_LPI *lpi, int firstcol, int lastcol, SCIP_Real *lb, SCIP_Real *ub, int *nnonz, int *beg, int *ind, SCIP_Real *val)
Definition: lpi_qso.c:1503
SCIP_RETCODE SCIPlpiGetRows(SCIP_LPI *lpi, int firstrow, int lastrow, SCIP_Real *lhs, SCIP_Real *rhs, int *nnonz, int *beg, int *ind, SCIP_Real *val)
Definition: lpi_qso.c:1604
Definition: type_lpi.h:43
SCIP_RETCODE SCIPlpiChgObj(SCIP_LPI *lpi, int ncols, const int *ind, const SCIP_Real *obj)
Definition: lpi_qso.c:1224
Definition: type_lpi.h:42
SCIP_RETCODE SCIPlpiGetBasisInd(SCIP_LPI *lpi, int *bind)
Definition: lpi_qso.c:2862
SCIP_RETCODE SCIPlpiGetColNames(SCIP_LPI *lpi, int firstcol, int lastcol, char **colnames, char *namestorage, int namestoragesize, int *storageleft)
Definition: lpi_qso.c:864
Definition: type_lpi.h:47
SCIP_RETCODE SCIPlpiGetSol(SCIP_LPI *lpi, SCIP_Real *objval, SCIP_Real *primsol, SCIP_Real *dualsol, SCIP_Real *activity, SCIP_Real *redcost)
Definition: lpi_qso.c:2493
SCIP_RETCODE SCIPlpiGetState(SCIP_LPI *lpi, BMS_BLKMEM *blkmem, SCIP_LPISTATE **lpistate)
Definition: lpi_qso.c:3060
Definition: lpi_qso.c:39
Definition: type_retcode.h:40
Definition: lpi_clp.cpp:123
SCIP_RETCODE SCIPlpiSetState(SCIP_LPI *lpi, BMS_BLKMEM *blkmem, const SCIP_LPISTATE *lpistate)
Definition: lpi_qso.c:3099
public methods for message output
Definition: type_lpi.h:82
Definition: type_lpi.h:72
Definition: lpi_clp.cpp:95
Definition: type_lpi.h:49
SCIP_RETCODE SCIPlpiStrongbranchInt(SCIP_LPI *lpi, int col, SCIP_Real psol, int itlim, SCIP_Real *down, SCIP_Real *up, SCIP_Bool *downvalid, SCIP_Bool *upvalid, int *iter)
Definition: lpi_qso.c:2079
SCIP_RETCODE SCIPlpiGetBInvRow(SCIP_LPI *lpi, int r, SCIP_Real *coef, int *inds, int *ninds)
Definition: lpi_qso.c:2907
SCIP_RETCODE SCIPlpiFreeState(SCIP_LPI *lpi, BMS_BLKMEM *blkmem, SCIP_LPISTATE **lpistate)
Definition: lpi_qso.c:3262
SCIP_RETCODE SCIPlpiGetIterations(SCIP_LPI *lpi, int *iterations)
Definition: lpi_qso.c:2641
Definition: type_lpi.h:69
Definition: type_retcode.h:37
Definition: type_lpi.h:46
Definition: type_lpi.h:83
SCIP_RETCODE SCIPlpiGetRealpar(SCIP_LPI *lpi, SCIP_LPPARAM type, SCIP_Real *dval)
Definition: lpi_qso.c:3568
Definition: type_retcode.h:43
SCIP_RETCODE SCIPlpiGetPrimalRay(SCIP_LPI *lpi, SCIP_Real *ray)
Definition: lpi_qso.c:2609
static void lpistateFree(SCIP_LPISTATE **lpistate, BMS_BLKMEM *blkmem)
Definition: lpi_qso.c:222
Definition: type_lpi.h:85
SCIP_RETCODE SCIPlpiGetRealSolQuality(SCIP_LPI *lpi, SCIP_LPSOLQUALITY qualityindicator, SCIP_Real *quality)
Definition: lpi_qso.c:2665
Definition: type_lpi.h:48
Definition: type_lpi.h:84
SCIP_RETCODE SCIPlpiWriteState(SCIP_LPI *lpi, const char *fname)
Definition: lpi_qso.c:3313
SCIP_RETCODE SCIPlpiGetObjsen(SCIP_LPI *lpi, SCIP_OBJSEN *objsen)
Definition: lpi_qso.c:1723