C Interface: read optimal basis

src/Cbc_C_Interface.cpp

@@ -1274,6 +1274,18 @@ Cbc_writeMps(Cbc_Model *model, const char *filename)
   model->solver_->writeMps(filename, "mps", Cbc_getObjSense(model));
 }
 
+int Cbc_readBasis(Cbc_Model *model, const char *filename) {
+  OsiClpSolverInterface *solver = model->solver_;
+  ClpSimplex *clps = solver->getModelPtr();
+  return clps->readBasis(filename);
+}
+
+int Cbc_writeBasis(Cbc_Model *model, const char *filename, char writeValues, int formatType) {
+  OsiClpSolverInterface *solver = model->solver_;
+  ClpSimplex *clps = solver->getModelPtr();
+  return clps->writeBasis(filename, writeValues, formatType);
+}
+
 /** Writes an LP file
  *
  * @param model problem object

src/Cbc_C_Interface.h

@@ -826,6 +826,16 @@ Cbc_readMps(Cbc_Model *model, const char *filename);
 CBCSOLVERLIB_EXPORT int CBC_LINKAGE
 Cbc_readLp(Cbc_Model *model, const char *filename);
 
+/** @brief Read the optimal basis for the linear program
+  *
+  * @param model problem object
+  * @param fileName file name 
+  * @return returns -1 on file error, 0 if no values, 1 if values.
+  **/
+CBCSOLVERLIB_EXPORT int CBC_LINKAGE
+Cbc_readBasis(Cbc_Model *model, const char *filename);
+
+
 /** @brief Write an MPS file from the given filename 
   *
   * @param model problem object
@@ -842,6 +852,18 @@ Cbc_writeMps(Cbc_Model *model, const char *filename);
 CBCSOLVERLIB_EXPORT void CBC_LINKAGE
 Cbc_writeLp(Cbc_Model *model, const char *filename);
 
+/** @brief Saves the optimal basis for the linear program
+  *
+  * @param model problem object
+  * @param fileName file name 
+  * @param writeValues If writeValues = 1 writes values of structurals (and adds VALUES to end of NAME card), 0 otherwise
+  * @param formatType 0 - normal,   1 - extra accuracy,   2 - IEEE hex(later)
+  * @return non-zero on IO error
+  **/
+CBCSOLVERLIB_EXPORT int CBC_LINKAGE
+Cbc_writeBasis(Cbc_Model *model, const char *filename, char writeValues, int formatType);
+
+
 /** @brief If Cbc was built with gzip compressed files support
   *
   * @return 1 if yes, 0 otherwise