//Main Function
void mexFunction(int nlhs, mxArray *plhs[],int nrhs, const mxArray *prhs[])
{
int printLevel = 0;
DerivedHandler *mexprinter = NULL;
try {
//Header
if(nrhs < 1) {
if(nlhs < 1)
printSolverInfo();
else
plhs[0] = mxCreateString(BONMIN_VERSION);
return;
}
// Check to see if we have the correct number of input and output arguments.
if (nrhs != 3)
throw MatlabException("Incorrect number of input arguments");
if (nlhs != 2)
throw MatlabException("Incorrect number of output arguments");
// See if we are printing messages
if(mxGetField(prhs[2],0,"display"))
printLevel = (int)*mxGetPr(mxGetField(prhs[2],0,"display"));
else
printLevel = 0;
// Get the first input which specifies the initial iterate.
Iterate x0(mxDuplicateArray(prhs[0]));
// Get the second input which specifies the callback functions.
CallbackFunctions funcs(prhs[1]);
//Append linear constraints if present
if(mxGetField(prhs[2],0,"A") && !mxIsEmpty(mxGetField(prhs[2],0,"A")))
funcs.appLinearConstraints(mxGetField(prhs[2],0,"A"));
//Setup our Message Handler
if(printLevel) {
mexprinter = new DerivedHandler();
mexprinter->setLogLevel(printLevel);
}
// Create a new Bonmin setup object and process the options.
BonminSetup app(mexprinter);
app.initializeOptionsAndJournalist();
Options options(x0,app,prhs[2]);
// Set up the BONMIN console
if(printLevel) {
//Create Journal to receive BONMIN messages
SmartPtr<Journal> console = new MatlabJournal((EJournalLevel)printLevel);
app.journalist()->AddJournal(console);
}
// The first output argument is the value of the optimization variables obtained at the solution.
plhs[0] = mxDuplicateArray(x0);
Iterate x(plhs[0]);
// The second output argument stores other information, such as
// the exit status, the value of the Lagrange multipliers upon
// termination, the final state of the auxiliary data, and so on.
MatlabInfo info(plhs[1]);
// Check to see whether the user provided a callback function for
// computing the Hessian. This is not needed in the special case
// when a quasi-Newton approximation to the Hessian is being used.
if (!options.bonminOptions().useQuasiNewton() && !funcs.hessianFuncIsAvailable())
throw MatlabException("You must supply a callback function for computing the Hessian unless you decide to use a quasi-Newton approximation to the Hessian");
// If the user tried to use her own scaling, report an error.
if (options.bonminOptions().userScaling())
throw MatlabException("The user-defined scaling option does not work in the MATLAB interface for BONMIN");
//If the user supplied linear constraints, see if we can enable constant jac
if(funcs.linearAIsAvailable()) {
int nl = options.numNLconstraints();
//If no nonlinear constraints, set all linear
if(!nl) {
//Set in relaxed solver (BONMIN is done automatically in options)
app.options()->SetStringValue("jac_c_constant","yes");
app.options()->SetStringValue("jac_d_constant","yes");
}
//Else check if any inequality or equality constraints are nonlinear
else {
bool nlEq=false, nlIneq=false;
const double *cl = options.constraintlb(), *cu = options.constraintub();
for(int i = 0; i < nl; i++)
if(cl[i] == cu[i])
nlEq = true;
else
nlIneq = true;
//Enable relaxed solver options based on what we found above (BONMIN is done automatically in options)
if(!nlEq) app.options()->SetStringValue("jac_c_constant","yes");
if(!nlIneq) app.options()->SetStringValue("jac_d_constant","yes");
}
}
/*** EDIT FOR LIBMWMA57 ***/
//If using MA57 assume MathWorks version, disable MeTiS use (crashes on uncon problem)
#ifdef haveMA57
if (!options.bonminOptions().usingMA57()) {
int value;
app.options()->GetIntegerValue("ma57_pivot_order",value,"");
if(value > 3) {
//mexWarnMsgTxt("overriding ma57 pivot order to option 2 (no MeTiS).");
app.options()->SetIntegerValue("ma57_pivot_order",2); }
}
#endif
// Create a new instance of the constrained, mixed integer nonlinear program.
MatlabProgram* matlabProgram = new MatlabProgram(x0,funcs,options,x,options.getAuxData(),info);
SmartPtr<TMINLP> program = matlabProgram;
// Intialize the Bonmin Setup object and process the options.
try
{
app.initialize(GetRawPtr(program));
}
catch(...)
{
mexErrMsgTxt("Error initializing BONMIN problem!");
}
// Ask Bonmin to solve the problem.
Bab bb;
try
{
bb(app);
}
catch (std::exception& error)
{
mexErrMsgTxt(error.what());
}
catch(...)
{
mexErrMsgTxt("Error running BONMIN solver, ensure your problem is not infeasible at the root node.");
}
// Collect statistics about Bonmin run
info.setIterationCount(bb.iterationCount());
info.setNumNodes(bb.numNodes());
info.setExitStatus(bb.mipStatus());
//If feasible solution found, get best (relaxed)
info.setBestObj(bb.continuousRelaxation());
// Free the dynamically allocated memory.
mxDestroyArray(x0);
}
catch (std::exception& error)
{
mexErrMsgTxt(error.what());
}
catch(...)
{
mexErrMsgTxt("Error in BONMIN MEX Interface");
}
}
// status = write_mps_file(c,a,lhs,rhs,ub,lb,btype,vartype,filename);
// btype is not yet used. But I keep this parameter for the future
extern "C" int write_mps_file(char * fname)
{
int m_c, n_c;
int m_a, n_a;
int m_lhs, n_lhs;
int m_rhs, n_rhs;
int m_ub, n_ub;
int m_lb, n_lb;
int m_col_name, n_col_name;
int m_row_name, n_row_name;
vector<string> RowNames, ColNames;
stringstream tmpstring;
CoinMpsIO mpsWriter;
DerivedHandler * printer = NULL;
CoinPackedMatrix A_matrix;
SciSparse S_A;
char ** pColNames = NULL;
char ** pRowNames = NULL;
int i, j, status;
int nrows, ncols, count, type;
int * c_addr = NULL, * lhs_addr = NULL, * rhs_addr = NULL, * ub_addr = NULL, * lb_addr = NULL;
int * btype_addr = NULL, * vartype_addr = NULL, * pb_name_addr = NULL, * a_addr = NULL;
int * col_name_addr = NULL, * row_name_addr = NULL, * filename_addr = NULL, * verbose_addr = NULL;
double * c = NULL, * lhs = NULL, * rhs = NULL, * ub = NULL, * lb = NULL, * a = NULL;
double verbose = 0;
char * btype = NULL, * vartype = NULL, * pb_name = NULL, * filename = NULL;
SciErr _SciErr;
_SciErr = getVarAddressFromPosition(pvApiCtx, C_IN, &c_addr); SCICOINOR_ERROR;
_SciErr = getMatrixOfDouble(pvApiCtx, c_addr, &n_c, &m_c, &c); SCICOINOR_ERROR;
_SciErr = getVarAddressFromPosition(pvApiCtx, LHS_IN, &lhs_addr); SCICOINOR_ERROR;
_SciErr = getMatrixOfDouble(pvApiCtx, lhs_addr, &n_lhs, &m_lhs, &lhs); SCICOINOR_ERROR;
_SciErr = getVarAddressFromPosition(pvApiCtx, RHS_IN, &rhs_addr); SCICOINOR_ERROR;
_SciErr = getMatrixOfDouble(pvApiCtx, rhs_addr, &n_rhs, &m_rhs, &rhs); SCICOINOR_ERROR;
_SciErr = getVarAddressFromPosition(pvApiCtx, UB_IN, &ub_addr); SCICOINOR_ERROR;
_SciErr = getMatrixOfDouble(pvApiCtx, ub_addr, &n_ub, &m_ub, &ub); SCICOINOR_ERROR;
_SciErr = getVarAddressFromPosition(pvApiCtx, LB_IN, &lb_addr); SCICOINOR_ERROR;
_SciErr = getMatrixOfDouble(pvApiCtx, lb_addr, &n_lb, &m_lb, &lb); SCICOINOR_ERROR;
_SciErr = getVarAddressFromPosition(pvApiCtx, BTYPE_IN, &btype_addr); SCICOINOR_ERROR;
getAllocatedSingleString(pvApiCtx, btype_addr, &btype);
_SciErr = getVarAddressFromPosition(pvApiCtx, VARTYPE_IN, &vartype_addr); SCICOINOR_ERROR;
getAllocatedSingleString(pvApiCtx, vartype_addr, &vartype);
_SciErr = getVarAddressFromPosition(pvApiCtx, PB_NAME_IN, &pb_name_addr); SCICOINOR_ERROR;
getAllocatedSingleString(pvApiCtx, pb_name_addr, &pb_name);
_SciErr = getVarAddressFromPosition(pvApiCtx, COL_NAME_IN, &col_name_addr); SCICOINOR_ERROR;
getAllocatedMatrixOfString(pvApiCtx, col_name_addr, &n_col_name, &m_col_name, &pColNames);
_SciErr = getVarAddressFromPosition(pvApiCtx, ROW_NAME_IN, &row_name_addr); SCICOINOR_ERROR;
getAllocatedMatrixOfString(pvApiCtx, row_name_addr, &n_row_name, &m_row_name, &pRowNames);
_SciErr = getVarAddressFromPosition(pvApiCtx, FILENAME_IN, &filename_addr); SCICOINOR_ERROR;
getAllocatedSingleString(pvApiCtx, filename_addr, &filename);
_SciErr = getVarAddressFromPosition(pvApiCtx, VERBOSE_IN, &verbose_addr); SCICOINOR_ERROR;
getScalarDouble(pvApiCtx, verbose_addr, &verbose);
nrows = n_lhs * m_lhs;
if (nrows==0) nrows = n_rhs*m_rhs;
ncols = n_c * m_c;
#ifdef DEBUG
DBGPRINTF("rowname n = %d m = %d\n", n_row_name, m_row_name);
#endif
if (n_row_name * m_row_name==0)
{
RowNames.resize(nrows);
for(i=0;i<nrows;i++)
{
tmpstring.str("");
tmpstring << "R" << i;
RowNames[i] = tmpstring.str();
}
}
else
{
RowNames.resize(nrows);
for(i=0;i<nrows;i++)
{
RowNames[i] = string(pRowNames[i]);
}
}
#ifdef DEBUG
DBGPRINTF("colname n = %d m = %d\n", n_col_name, m_col_name);
#endif
if (n_col_name * m_col_name==0)
{
ColNames.resize(ncols);
for(i=0;i<ncols;i++)
{
tmpstring.str("");
tmpstring << "R" << i;
ColNames[i] = tmpstring.str();
}
}
else
{
ColNames.resize(ncols);
for(i=0;i<ncols;i++)
{
ColNames[i] = string(pColNames[i]);
}
}
//////////////////
// The A matrix //
//////////////////
_SciErr = getVarAddressFromPosition(pvApiCtx, A_IN, &a_addr); SCICOINOR_ERROR;
_SciErr = getVarType(pvApiCtx, a_addr, &type); SCICOINOR_ERROR;
if(type!=sci_sparse)
{
_SciErr = getMatrixOfDouble(pvApiCtx, a_addr, &n_a, &m_a, &a); SCICOINOR_ERROR;
A_matrix.setDimensions(nrows,ncols);
if (a==NULL)
{
Scierror(999,"%s: invalid value of matrix a\n",fname);
freeAllocatedSingleString(btype);
freeAllocatedSingleString(vartype);
freeAllocatedSingleString(pb_name);
freeAllocatedSingleString(filename);
if (pRowNames) freeAllocatedMatrixOfString(m_row_name, n_row_name, pRowNames);
if (pColNames) freeAllocatedMatrixOfString(m_col_name, n_col_name, pColNames);
return 0;
}
for(i=0; i<m_a; i++)
{
for(j=0; j<n_a; j++)
{
if (*(a+i+j*m_a) != 0) A_matrix.modifyCoefficient(i,j,*(a+i+j*m_a));
}
}
}
else
{
getAllocatedSparseMatrix(pvApiCtx, a_addr, &S_A.m, &S_A.n, &S_A.nel, &S_A.mnel, &S_A.icol, &S_A.R);
A_matrix.setDimensions(nrows,ncols);
count = 0;
for(i=0;i<S_A.m;i++)
{
if (S_A.mnel[i]!=0)
{
for(j=0;j<S_A.mnel[i];j++)
{
count++;
A_matrix.modifyCoefficient(i,S_A.icol[count-1]-1,S_A.R[count-1]);
}
}
}
freeAllocatedSparseMatrix(S_A.mnel, S_A.icol, S_A.R);
}
if (verbose)
{
printer = new DerivedHandler();
printer->setLogLevel((int)verbose);
mpsWriter.passInMessageHandler(printer);
}
// void setMpsData (const CoinPackedMatrix &m, const double infinity,
// const double *collb, const double *colub,
// const double *obj, const char *integrality,
// const double *rowlb, const double *rowub,
// const std::vector< std::string > &colnames, const std::vector< std::string > &rownames)
mpsWriter.setMpsData(A_matrix, mpsWriter.getInfinity(),
lb, ub,
c, vartype,
lhs, rhs,
ColNames, RowNames);
mpsWriter.setProblemName(pb_name);
status = mpsWriter.writeMps(filename);
createScalarDouble(pvApiCtx, STATUS_OUT, (double)status);
LhsVar(1) = STATUS_OUT;
freeAllocatedSingleString(btype);
freeAllocatedSingleString(vartype);
freeAllocatedSingleString(pb_name);
freeAllocatedSingleString(filename);
if (pRowNames) freeAllocatedMatrixOfString(m_row_name, n_row_name, pRowNames);
if (pColNames) freeAllocatedMatrixOfString(m_col_name, n_col_name, pColNames);
return 0;
}
// To define the function sciclp as a C function and allow this function to be loaded easily in scilab
extern "C" int sciclp(char * fname)
{
ClpSimplex * modelSimplex = NULL;
ClpInterior * modelInterior = NULL;
ClpModel * modelBase = NULL;
ClpCholeskyBase * cholesky = NULL;
DerivedHandler * printer = NULL;
ClpSolve modelSolve; // YC: we can set some parameters via CbcSolve
CoinPackedMatrix A_matrix, Q_matrix;
#ifdef HANDLE_CTRLC
MyClpEventHandler SciClpEventHandler;
SciClpEventHandler.setInCbc(false);
#endif
int Log = 0;
int ncols = 0, nrows = 0, i, j, nz = 0, writemps = 0;
int count = 0, status = 0, type;
char * writemps_filename = NULL;
SciSparse S_A, S_Q;
if (Rhs<LASTPARAM)
{
Scierror(999,"%s: 12 inputs required in call to %s. Bug in clp.sci ?...\n", fname, fname);
return 0;
}
/* Get pointers to input */
int n_a, m_a, * a_addr = NULL;
int n_c, m_c, * c_addr = NULL;
int n_lhs, m_lhs, * lhs_addr = NULL;
int n_rhs, m_rhs, * rhs_addr = NULL;
int n_upper, m_upper, * upper_addr = NULL;
int n_lower, m_lower, * lower_addr = NULL;
int * vtype_addr = NULL;
int * ctype_addr = NULL;
int n_q, m_q, * q_addr = NULL;
double * c = NULL, * lhs = NULL, * rhs = NULL, * lower = NULL, * upper = NULL, * a = NULL;
double * q = NULL;
char * ctype = NULL, * vtype = NULL;
SciErr _SciErr;
_SciErr = getVarAddressFromPosition(pvApiCtx, C_IN, &c_addr); SCICOINOR_ERROR;
_SciErr = getMatrixOfDouble(pvApiCtx, c_addr, &n_c, &m_c, &c); SCICOINOR_ERROR;
_SciErr = getVarAddressFromPosition(pvApiCtx, LHS_IN, &lhs_addr); SCICOINOR_ERROR;
_SciErr = getMatrixOfDouble(pvApiCtx, lhs_addr, &n_lhs, &m_lhs, &lhs); SCICOINOR_ERROR;
_SciErr = getVarAddressFromPosition(pvApiCtx, RHS_IN, &rhs_addr); SCICOINOR_ERROR;
_SciErr = getMatrixOfDouble(pvApiCtx, rhs_addr, &n_rhs, &m_rhs, &rhs); SCICOINOR_ERROR;
_SciErr = getVarAddressFromPosition(pvApiCtx, LOWER_IN, &lower_addr); SCICOINOR_ERROR;
_SciErr = getMatrixOfDouble(pvApiCtx, lower_addr, &n_lower, &m_lower, &lower); SCICOINOR_ERROR;
_SciErr = getVarAddressFromPosition(pvApiCtx, UPPER_IN, &upper_addr); SCICOINOR_ERROR;
_SciErr = getMatrixOfDouble(pvApiCtx, upper_addr, &n_upper, &m_upper, &upper); SCICOINOR_ERROR;
_SciErr = getVarAddressFromPosition(pvApiCtx, CTYPE_IN, &ctype_addr); SCICOINOR_ERROR;
getAllocatedSingleString(pvApiCtx, ctype_addr, &ctype);
_SciErr = getVarAddressFromPosition(pvApiCtx, VTYPE_IN, &vtype_addr); SCICOINOR_ERROR;
getAllocatedSingleString(pvApiCtx, vtype_addr, &vtype);
ncols = n_c * m_c; /* Length of c == number of columns */
nrows = n_rhs * m_rhs; /* length of b == number of rows */
if (nrows==0) nrows = n_lhs * m_lhs;
#ifdef DEBUG
sciprint("DEBUG: c size: m = %d n = %d\n", m_c, n_c);
sciprint("DEBUG: lhs size: m = %d n = %d\n", m_lhs, n_lhs);
sciprint("DEBUG: rhs size: m = %d n = %d\n", m_rhs, n_rhs);
sciprint("DEBUG: lower size: m = %d n = %d\n", m_lower, n_lower);
sciprint("DEBUG: upper size: m = %d n = %d\n", m_upper, n_upper);
sciprint("DEBUG: ctype size: m = %d n = %d\n", m_ctype, n_ctype);
sciprint("DEBUG: vtype size: m = %d n = %d\n", m_vtype, n_vtype);
sciprint("DEBUG: nrows = %d\n", nrows);
sciprint("DEBUG: ncols = %d\n", ncols);
sciprint("c :");
for(i=0;i<ncols; i++) sciprint("%f ",*(c+i));
sciprint("\n");
sciprint("lhs :");
for(i=0;i<nrows; i++) sciprint("%f ",*(lhs+i));
sciprint("\n");
sciprint("rhs :");
for(i=0;i<nrows; i++) sciprint("%f ",*(rhs+i));
sciprint("\n");
sciprint("lb :");
for(i=0;i<ncols; i++) sciprint("%f ",*(lower+i));
sciprint("\n");
sciprint("ub :");
for(i=0;i<ncols; i++) sciprint("%f ",*(upper+i));
sciprint("\n");
sciprint("ctype = %s\n", ctype);
sciprint("vtype = %s\n", vtype);
#endif
//////////////////
// The A matrix //
//////////////////
_SciErr = getVarAddressFromPosition(pvApiCtx, A_IN, &a_addr); SCICOINOR_ERROR;
_SciErr = getVarType(pvApiCtx, a_addr, &type); SCICOINOR_ERROR;
if(type!=sci_sparse)
{
#ifdef DEBUG
sciprint("DEBUG: A_IN is not sparse\n");
#endif
_SciErr = getMatrixOfDouble(pvApiCtx, a_addr, &m_a, &n_a, &a); SCICOINOR_ERROR;
A_matrix.setDimensions(nrows,ncols);
if (a==NULL)
{
Scierror(999,"%s: invalid value of matrix a\n",fname);
freeAllocatedSingleString(ctype);
freeAllocatedSingleString(vtype);
return 0;
}
for(i=0; i<m_a; i++)
{
for(j=0; j<n_a; j++)
{
if (*(a+i+j*m_a) != 0) A_matrix.modifyCoefficient(i,j,*(a+i+j*m_a));
#ifdef DEBUG
sciprint("%f ",*(a+i+j*m_a));
#endif
}
#ifdef DEBUG
sciprint("\n");
#endif
}
}
else
{
#ifdef DEBUG
sciprint("DEBUG: A_IN is sparse\n");
#endif
getAllocatedSparseMatrix(pvApiCtx, a_addr, &S_A.m, &S_A.n, &S_A.nel, &S_A.mnel, &S_A.icol, &S_A.R);
A_matrix.setDimensions(nrows,ncols);
#ifdef DEBUG
sciprint("A = [%d,%d]\n", m_a, n_a);
#endif
nz = S_A.nel;
count = 0;
for(i=0;i<S_A.m;i++)
{
if (S_A.mnel[i]!=0)
{
#ifdef DEBUG
sciprint("mnel[%d] = %d - ",i, S_A.mnel[i]);
#endif
for(j=0;j<S_A.mnel[i];j++)
{
count++;
A_matrix.modifyCoefficient(i,S_A.icol[count-1]-1,S_A.R[count-1]);
#ifdef DEBUG
sciprint("[%d] = %f ", S_A.icol[count-1]-1, S_A.R[count-1]);
#endif
}
#ifdef DEBUG
sciprint("\n");
#endif
}
}
freeAllocatedSparseMatrix(S_A.mnel, S_A.icol, S_A.R);
}
/////////////////
// Get options //
/////////////////
#ifdef DEBUG
sciprint("DEBUG: get options\n");
#endif
// Default settings
int * param_in_addr = NULL;
int solverchoice = 1, loglevel = 0, fact_freq = 200, perturb = 0;
int presolve = 0, red_grad = 1, maximumbarrieriterations = 200;
int tmp_int, tmp_res;
double tmp_double;
char * tmp_char;
initPList(pvApiCtx, PARAM_IN, ¶m_in_addr);
if (!checkPList(pvApiCtx, param_in_addr))
{
Scierror(999, "%s: argument n° %d is not a plist\n", fname, PARAM_IN);
return 0;
}
// solver option
getIntInPList(pvApiCtx, param_in_addr, "solver", &tmp_int, &tmp_res, 1, Log, CHECK_NONE);
if (tmp_res!=-1) solverchoice = tmp_int;
// Load the matrix in the solver
switch(solverchoice)
{
case 6:
modelInterior = new ClpInterior;
modelBase = (ClpModel *)modelInterior;
break;
default:
modelSimplex = new ClpSimplex;
modelBase = (ClpModel *)modelSimplex;
break;
}
// maxnumiterations option
getIntInPList(pvApiCtx, param_in_addr, "maxnumiterations", &tmp_int, &tmp_res, 1000, Log, CHECK_NONE);
if (tmp_res!=-1) modelBase->setMaximumIterations(tmp_int);
// maxnumseconds option
getDoubleInPList(pvApiCtx, param_in_addr, "maxnumseconds", &tmp_double, &tmp_res, 3600, Log, CHECK_NONE);
if (tmp_res!=-1) modelBase->setMaximumSeconds(tmp_double);
// primaltolerance option
getDoubleInPList(pvApiCtx, param_in_addr, "primaltolerance", &tmp_double, &tmp_res, 1e-7, Log, CHECK_NONE);
if (tmp_res!=-1) modelBase->setPrimalTolerance(tmp_double);
// dualtolerance option
getDoubleInPList(pvApiCtx, param_in_addr, "dualtolerance", &tmp_double, &tmp_res, 1e-7, Log, CHECK_NONE);
if (tmp_res!=-1) modelBase->setDualTolerance(tmp_double);
// verbose option
getIntInPList(pvApiCtx, param_in_addr, "verbose", &tmp_int, &tmp_res, 0, Log, CHECK_NONE);
if (tmp_res!=-1)
{
///////////////////////////////
// Enable printing in Scilab //
// and set parameters of clp //
///////////////////////////////
loglevel = tmp_int;
printer = new DerivedHandler(); // assumed open
printer->setLogLevel(loglevel);
}
// optim_dir option
getIntInPList(pvApiCtx, param_in_addr, "optim_dir", &tmp_int, &tmp_res, 1, Log, CHECK_NONE);
if (tmp_res!=-1) modelBase->setOptimizationDirection(tmp_int);
// writemps option
getStringInPList(pvApiCtx, param_in_addr, "writemps", &tmp_char, &tmp_res, "test.mps", Log, CHECK_NONE);
if (tmp_res!=-1)
{
writemps_filename = tmp_char;
writemps = 1;
#ifdef DEBUG
sciprint("DEBUG: writemps_filename = %s\n", writemps_filename);
#endif
}
// perturb option
getIntInPList(pvApiCtx, param_in_addr, "perturb", &tmp_int, &tmp_res, 0, Log, CHECK_NONE);
if (tmp_res!=-1) perturb = tmp_int;
// scaling option
// Sets or unsets scaling:
// - 0 -off
// - 1 equilibrium (default)
// - 2 geometric
// - 3 auto
// - 4 auto-but-as-initialSolve-in-bab.
getIntInPList(pvApiCtx, param_in_addr, "scaling", &tmp_int, &tmp_res, 1, Log, CHECK_NONE);
if (tmp_res!=-1) modelBase->scaling(tmp_int);
// factorization frequency option
getIntInPList(pvApiCtx, param_in_addr, "fact_freq", &tmp_int, &tmp_res, 200, Log, CHECK_NONE);
if (tmp_res!=-1) fact_freq = tmp_int;
// presolve option
getIntInPList(pvApiCtx, param_in_addr, "presolve", &tmp_int, &tmp_res, 0, Log, CHECK_NONE);
if (tmp_res!=-1) presolve = tmp_int;
// reduced gradient phase option
getIntInPList(pvApiCtx, param_in_addr, "red_grad", &tmp_int, &tmp_res, 1, Log, CHECK_NONE);
if (tmp_res!=-1) red_grad = tmp_int;
// maxnumiterationshotstart
getIntInPList(pvApiCtx, param_in_addr, "maxnumiterationshotstart", &tmp_int, &tmp_res, 1000, Log, CHECK_NONE);
if (tmp_res!=-1) modelBase->setIntParam(ClpMaxNumIterationHotStart, tmp_int);
// dualobjectivelimit
getDoubleInPList(pvApiCtx, param_in_addr, "dualobjectivelimit", &tmp_double, &tmp_res, 1e-7, Log, CHECK_NONE);
if (tmp_res!=-1) modelBase->setDblParam(ClpDualObjectiveLimit, tmp_double);
// primalobjectivelimit
getDoubleInPList(pvApiCtx, param_in_addr, "primalobjectivelimit", &tmp_double, &tmp_res, 1e-7, Log, CHECK_NONE);
if (tmp_res!=-1) modelBase->setDblParam(ClpPrimalObjectiveLimit, tmp_double);
// obj offset
getDoubleInPList(pvApiCtx, param_in_addr, "objoffset", &tmp_double, &tmp_res, 0.0, Log, CHECK_NONE);
if (tmp_res!=-1) modelBase->setDblParam(ClpObjOffset, tmp_double);
// presolvetolerance
getDoubleInPList(pvApiCtx, param_in_addr, "presolvetolerance", &tmp_double, &tmp_res, 1e-7, Log, CHECK_NONE);
if (tmp_res!=-1) modelBase->setDblParam(ClpPresolveTolerance, tmp_double);
// maximumBarrierIterations
getIntInPList(pvApiCtx, param_in_addr, "maxnumbarrieriterations", &tmp_int, &tmp_res, 200, Log, CHECK_NONE);
if (tmp_res!=-1) maximumbarrieriterations = tmp_int;
/////////////////////////////////////
// Set the bounds on the variables //
/////////////////////////////////////
modelBase->loadProblem(A_matrix,lhs,rhs,c,lower,upper);
for(i=0;i<ncols; i++)
{
modelBase->setColUpper(i, *(upper+i));
modelBase->setColLower(i, *(lower+i));
modelBase->setObjectiveCoefficient(i,*(c+i));
if ((*(vtype+i)=='I')||(*(vtype+i)=='i'))
{
modelBase->setInteger(i);
}
else
{
modelBase->setContinuous(i);
}
}
/////////////////////////////////////////
// Set the boundary of the constraints //
/////////////////////////////////////////
// 'L' - smaller than - <=
// 'E' - equality - =
// 'G' - greater than - >=
// 'R' - Range - <= + >=
// 'N' - Free - no constraints
#ifdef DEBUG
sciprint("DEBUG: dealing with btype\n");
#endif
for(i=0;i<nrows; i++)
{
switch(*(ctype+i))
{
case 'l':
case 'L':
modelBase->setRowUpper(i, *(rhs+i));
modelBase->setRowLower(i, -COIN_DBL_MAX);
break;
case 'e':
case 'E':
modelBase->setRowUpper(i, *(rhs+i));
modelBase->setRowLower(i, *(rhs+i));
break;
case 'n':
case 'N':
modelBase->setRowUpper(i, COIN_DBL_MAX);
modelBase->setRowLower(i, -COIN_DBL_MAX);
break;
case 'r':
case 'R':
modelBase->setRowUpper(i, *(rhs+i));
modelBase->setRowLower(i, *(lhs+i));
break;
case 'g':
case 'G':
default:
modelBase->setRowUpper(i, COIN_DBL_MAX);
modelBase->setRowLower(i, *(lhs+i));
break;
}
#ifdef DEBUG
sciprint("row lower[%d] = %f row upper[%d] = %f\n", i, modelBase->getRowLower()[i], i, modelBase->getRowUpper()[i]);
#endif
}
///////////////////////////////////
// Affect names to rows and cols //
///////////////////////////////////
modelBase->setIntParam(ClpNameDiscipline,0);
////////////////////////
// Any quadratic part //
////////////////////////
#ifdef DEBUG
sciprint("DEBUG: dealing with Q\n");
#endif
_SciErr = getVarAddressFromPosition(pvApiCtx, Q_IN, &q_addr); SCICOINOR_ERROR;
_SciErr = getVarType(pvApiCtx, q_addr, &type); SCICOINOR_ERROR;
if(type!=sci_sparse)
{
_SciErr = getMatrixOfDouble(pvApiCtx, q_addr, &m_q, &n_q, &q); SCICOINOR_ERROR;
if (n_q * m_q !=0)
{
#ifdef DEBUG
sciprint("DEBUG: Q_IN is not sparse\n");
sciprint("DEBUG: Q size: n = %d m= %d\n", n_q, m_q);
#endif
Q_matrix.setDimensions(nrows,ncols);
nz = n_q * m_q;
if (q==NULL)
{
Scierror(999,"%s: invalid value of matrix q\n",fname);
freeAllocatedSingleString(ctype);
freeAllocatedSingleString(vtype);
if (writemps_filename) FREE(writemps_filename);
return 0;
}
for(i=0; i<m_q; i++)
{
for(j=0; j<n_q; j++)
{
if (*(q+i+j*m_q)!=0) Q_matrix.modifyCoefficient(i,j,*(q+i+j*m_q));
}
}
modelBase->loadQuadraticObjective(Q_matrix);
}
}
else
{
getAllocatedSparseMatrix(pvApiCtx, q_addr, &S_Q.m, &S_Q.n, &S_Q.nel, &S_Q.mnel, &S_Q.icol, &S_Q.R);
if (S_Q.n * S_Q.m!=0)
{
#ifdef DEBUG
sciprint("DEBUG: Q_IN is sparse\n");
sciprint("DEBUG: Q size: n = %d m= %d\n", S_Q.n, S_Q.m);
#endif
Q_matrix.setDimensions(nrows,ncols);
nz = S_Q.nel;
count = 0;
for(i=0;i<S_Q.m;i++)
{
if (S_Q.mnel[i]!=0)
{
for(j=0;j<S_Q.mnel[i];j++)
{
count++;
Q_matrix.modifyCoefficient(i,S_Q.icol[count-1]-1,S_Q.R[count-1]);
}
}
}
modelBase->loadQuadraticObjective(Q_matrix);
}
freeAllocatedSparseMatrix(S_Q.mnel, S_Q.icol, S_Q.R);
}
// Solver specific part
switch(solverchoice)
{
case 6:
modelInterior->setMaximumBarrierIterations(maximumbarrieriterations);
break;
default:
modelSimplex->setFactorizationFrequency(fact_freq);
modelSimplex->setPerturbation(perturb);
break;
}
///////////////////////////
// Pre / Post resolution //
///////////////////////////
#ifdef HANDLE_CTRLC
///////////////////////////////////////////////////////////
// Pass in the event handler, to handle ctrl+c in scilab //
///////////////////////////////////////////////////////////
if (modelSimplex)
{
modelSimplex->passInEventHandler(&SciClpEventHandler);
modelSimplex->passInMessageHandler(printer);
}
#endif
#ifdef DEBUG
sciprint("DEBUG: presolve\n");
#endif
// If the solver is not ClpInterior we can set the presolve option
if (presolve && solverchoice!=6)
{
TRYCATCH(modelSimplex->initialSolve(modelSolve));
switch(presolve)
{
case 2:
TRYCATCH(modelSimplex->initialDualSolve());
break;
case 3:
TRYCATCH(modelSimplex->initialPrimalSolve());
break;
case 4:
TRYCATCH(modelSimplex->initialBarrierSolve());
break;
case 5:
TRYCATCH(modelSimplex->initialBarrierNoCrossSolve());
break;
default:
TRYCATCH(modelSimplex->initialSolve());
break;
}
}
////////////////////////////////////////////
// If needed, write the problem in a file //
////////////////////////////////////////////
#ifdef DEBUG
sciprint("DEBUG: dealing with writemps\n");
#endif
if (writemps)
{
modelBase->writeMps(writemps_filename);
if (loglevel) sciprint("sciclp: writing %s mps file\n",writemps_filename);
}
////////////////
// Resolution //
////////////////
#ifdef DEBUG
sciprint("DEBUG: resolution\n");
sciprint("model number columns = %d\n", modelBase->numberColumns());
sciprint("model number rows = %d\n", modelBase->numberRows());
#endif
if ((solverchoice>=1)&&(solverchoice<=5))
{
TRYCATCH(modelSimplex->initialSolve())
}
#ifdef HANDLE_CTRLC
///////////////////////////////////////////////////////////
// Pass in the event handler, to handle ctrl+c in scilab //
///////////////////////////////////////////////////////////
if (modelSimplex)
{
modelSimplex->passInEventHandler(&SciClpEventHandler);
modelSimplex->passInMessageHandler(printer);
}
if (modelInterior)
{
modelInterior->passInEventHandler(&SciClpEventHandler);
modelInterior->passInMessageHandler(printer);
}
#endif
switch (solverchoice)
{
case 2:
TRYCATCH(status = modelSimplex->dual());
break;
case 3:
TRYCATCH(status = modelSimplex->barrier(false));
break;
case 4:
TRYCATCH(status = modelSimplex->barrier(true));
break;
case 5:
TRYCATCH(status = modelSimplex->reducedGradient(red_grad));
break;
case 6:
cholesky = new ClpCholeskyBase();
cholesky->setKKT(true);
modelInterior->setCholesky(cholesky);
TRYCATCH(status = modelInterior->primalDual());
break;
case 7:
TRYCATCH(status = modelInterior->pdco());
break;
default:
TRYCATCH(status = modelSimplex->primal());
break;
}
#ifdef DEBUG
if (status && loglevel) sciprint("Optimization failed\n");
#endif
int clp_status = 0;
clp_status = (int)(pow(2.0,0.0)*modelBase->isAbandoned());
clp_status += (int)(pow(2.0,1.0)*modelBase->isProvenOptimal());
clp_status += (int)(pow(2.0,2.0)*modelBase->isProvenPrimalInfeasible());
clp_status += (int)(pow(2.0,3.0)*modelBase->isProvenDualInfeasible());
clp_status += (int)(pow(2.0,4.0)*modelBase->isPrimalObjectiveLimitReached());
clp_status += (int)(pow(2.0,5.0)*modelBase->isDualObjectiveLimitReached());
clp_status += (int)(pow(2.0,6.0)*modelBase->isIterationLimitReached());
//////////////////////////////
// Allocate for return data //
//////////////////////////////
#ifdef DEBUG
sciprint("DEBUG: allocating data\n");
#endif
int m_xmin = ncols, n_xmin = 1;
int m_lambda = 1, n_lambda = nrows;
int * extra_addr = NULL;
char * ListLabels [] = {"lambda","secondary_status","clp_status"};
_SciErr = createMatrixOfDouble(pvApiCtx, XMIN_OUT, m_xmin, n_xmin, (double *)modelBase->primalColumnSolution()); SCICOINOR_ERROR;
createScalarDouble(pvApiCtx, FMIN_OUT, modelBase->getObjValue());
createScalarDouble(pvApiCtx, STATUS_OUT, (double)modelBase->status());
_SciErr = createPList(pvApiCtx, EXTRA_OUT, &extra_addr, (char **)ListLabels, 3); SCICOINOR_ERROR;
_SciErr = createColVectorOfDoubleInPList(pvApiCtx, EXTRA_OUT, extra_addr, "lambda", m_lambda*n_lambda, (double *)modelBase->dualRowSolution()); SCICOINOR_ERROR;
_SciErr = createIntInPList(pvApiCtx, EXTRA_OUT, extra_addr, "secondary_status", modelBase->secondaryStatus()); SCICOINOR_ERROR;
_SciErr = createIntInPList(pvApiCtx, EXTRA_OUT, extra_addr, "clp_status", clp_status); SCICOINOR_ERROR;
#ifdef DEBUG
sciprint("DEBUG: getting solution\n");
#endif
//
// status of problem:
// -1 - unknown e.g. before solve or if postSolve says not optimal
// 0 - optimal
// 1 - primal infeasible
// 2 - dual infeasible
// 3 - stopped on iterations or time
// 4 - stopped due to errors
// 5 - stopped by event handler (virtual int ClpEventHandler::event())
//
// Secondary status of problem - may get extended
// - 0 - none
// - 1 - primal infeasible because dual limit reached OR probably primal infeasible but can't prove it (main status 4)
// - 2 - scaled problem optimal - unscaled problem has primal infeasibilities
// - 3 - scaled problem optimal - unscaled problem has dual infeasibilities
// - 4 - scaled problem optimal - unscaled problem has primal and dual infeasibilities
// - 5 - giving up in primal with flagged variables
// - 6 - failed due to empty problem check
// - 7 - postSolve says not optimal
// - 8 - failed due to bad element check
// - 9 - status was 3 and stopped on time
// - 100 up - translation of enum from ClpEventHandler.
/////////////////////////////////
// Copy solutions if available //
/////////////////////////////////
#ifdef DEBUG
sciprint("DEBUG: returning data\n");
#endif
LhsVar(1) = XMIN_OUT;
LhsVar(2) = FMIN_OUT;
LhsVar(3) = STATUS_OUT;
LhsVar(4) = EXTRA_OUT;
//////////////////////////////
// Delete allocated objects //
//////////////////////////////
if (modelSimplex) delete modelSimplex;
if (modelInterior) delete modelInterior;
if (printer) delete printer;
freeAllocatedSingleString(ctype);
freeAllocatedSingleString(vtype);
if (writemps_filename) FREE(writemps_filename);
return 0;
}
// mex function usage:
// [x,y,status] = mexosi(n_vars,n_cons,A,x_lb,x_ub,c,Ax_lb,Ax_ub,isMIP,isQP,vartype,Q,options)
// 0 1 2 3 4 5 6 7 8 9 10 11 12
void mexFunction(int nlhs, mxArray *plhs[],int nrhs, const mxArray *prhs[])
{
// Enable printing in MATLAB
int loglevel = 0;
DerivedHandler *mexprinter = new DerivedHandler(); // assumed open
mexprinter->setLogLevel(loglevel);
// check that we have the right number of inputs
if(nrhs < 10) mexErrMsgTxt("At least 10 inputs required in call to mexosi. Bug in osi.m?...");
// check that we have the right number of outputs
if(nlhs < 3) mexErrMsgTxt("At least 3 ouptuts required in call to mexosi. Bug in osi.m?...");
// Get pointers to input values
const int n_vars = (int)*mxGetPr(prhs[0]);
const int n_cons = (int)*mxGetPr(prhs[1]);
const mxArray *A = prhs[2];
const double *x_lb = mxGetPr(prhs[3]);
const double *x_ub = mxGetPr(prhs[4]);
const double *c = mxGetPr(prhs[5]);
const double *Ax_lb = mxGetPr(prhs[6]);
const double *Ax_ub = mxGetPr(prhs[7]);
const bool isMIP = (bool)*(mxLogical*)mxGetData(prhs[8]);
const bool isQP = (bool)*(mxLogical*)mxGetData(prhs[9]);
mxLogical *isinteger = (mxLogical*)mxGetData(prhs[10]);
const mxArray* Q = prhs[11];
// process the options
int returnStatus = 0;
// extract row/col/value data from A
const mwIndex * A_col_starts = mxGetJc(A);
const mwIndex * A_row_index = mxGetIr(A);
const double * A_data = mxGetPr(A);
// figure out the number of non-zeros in A
int nnz = (int)(A_col_starts[n_vars] - A_col_starts[0]); // number of non-zeros
//mexPrintf("nnz = %d, n_vars = %d, n_cons = %d\n",nnz,n_vars,n_cons);
// we need to convert these into other types of indices for Coin to use them
std::vector<CoinBigIndex> A_col_starts_coin(A_col_starts,A_col_starts+n_vars+1);
std::vector<int> A_row_index_coin(A_row_index,A_row_index+nnz);
// declare the solver
OsiSolverInterface* pSolver;
// initialize the solver
if ( isMIP ) {
pSolver = new OsiCbcSolverInterface;
} else {
pSolver = new OsiClpSolverInterface;
}
// OsiCbcSolverInterface is deprecated and CbcModel should be used instead but don't
// know how to get that working with loadProblem.
// OsiCbcSolverInterface solver1;
// CbcModel model(solver1);
// CbcMain0(model);
// OsiSolverInterface * pSolver = model.solver();
if (nrhs>12) { // get stuff out of the options structure if provided
// Finish me
}
// mexPrintf("Setting Log Level to 0.\n");
// load the problem
mexPrintf("Loading the problem.\n");
pSolver->loadProblem( n_vars, n_cons, // problem size
&A_col_starts_coin[0], &A_row_index_coin[0], A_data, // the A matrix
x_lb, x_ub, c, // the objective and bounds
Ax_lb, Ax_ub ); // the constraint bounds
// pSolver->messageHandler()->setLogLevel(0); // This doesn't seem to work
pSolver->setHintParam(OsiDoReducePrint,true,OsiHintTry);
// deal with integer inputs
if ( isMIP ) {
for(int i=0;i<n_vars;i++) {
if (isinteger[i]) pSolver->setInteger(i);
}
}
if (isQP) {
error("QP is not working yet");
// need to call loadQuadraticObjective here ???
}
// CbcModel model(pSolver);
// model.solver()->setHintParam(OsiDoReducePrint,true,OsiHintTry);
// solve the problem
//mexPrintf("Trying to solve the problem.\n");
if (isMIP) {
pSolver->branchAndBound();
// model.branchAndBound();
} else {
// model.initialSolve();
pSolver->initialSolve();
}
// Allocate memory for return data
plhs[0] = mxCreateDoubleMatrix(n_vars,1, mxREAL); // for the solution
plhs[1] = mxCreateDoubleMatrix(n_cons,1, mxREAL); // for the constraint prices
plhs[2] = mxCreateDoubleMatrix(1,1, mxREAL); // for the return status
double *x = mxGetPr(plhs[0]);
double *y = mxGetPr(plhs[1]);
double *returncode = mxGetPr(plhs[2]);
// Copy solutions if available
if ( pSolver->isProvenOptimal() ) {
// if ( model.isProvenOptimal() ) {
// if ( model.solver()->isProvenOptimal() ) {
//mexPrintf("Solution found.\n");
// extract the solutions
const double * solution = pSolver->getColSolution();
const double * dualvars = pSolver->getRowPrice();
// copy the solution to the outpus
memcpy(x,solution,n_vars*sizeof(double));
memcpy(y,dualvars,n_cons*sizeof(double));
*returncode = 1;
} else {
if ( pSolver->isProvenPrimalInfeasible() ) {
mexPrintf("Primal problem is proven infeasible.\n");
*returncode = 0;
} else if ( pSolver->isProvenDualInfeasible() ) {
mexPrintf("Dual problem is proven infeasible.\n");
*returncode = -1;
} else if ( pSolver->isPrimalObjectiveLimitReached() ) {
mexPrintf("The primal objective limit was reached.\n");
*returncode = -2;
} else if ( pSolver->isDualObjectiveLimitReached() ) {
mexPrintf("The dual objective limit was reached.\n");
*returncode = -3;
} else if ( pSolver->isIterationLimitReached() ) {
mexPrintf("The iteration limit was reached\n");
*returncode = -4;
}
}
// clean up memory
if ( mexprinter!= NULL) delete mexprinter;
delete pSolver;
}
