diff -r 751a14b992f2 -r bfbdded3763a lemon/lp_glpk.cc
--- a/lemon/lp_glpk.cc	Fri Feb 16 15:57:48 2007 +0000
+++ b/lemon/lp_glpk.cc	Fri Feb 16 19:11:31 2007 +0000
@@ -37,6 +37,7 @@
     rows = _lp_bits::LpId(1);
     cols = _lp_bits::LpId(1);
     lp = lpx_create_prob();
+    lpx_create_index(lp);
     ///\todo control function for this:
     lpx_set_int_parm(lp, LPX_K_DUAL, 1);
     messageLevel(0);
@@ -112,7 +113,7 @@
     lpx_del_rows(lp, 1, rows);
   }
 
-  void LpGlpk::_getColName(int col, std::string & name)
+  void LpGlpk::_getColName(int col, std::string & name) const
   {
     
     char *n = lpx_get_col_name(lp,col);
@@ -125,6 +126,13 @@
     lpx_set_col_name(lp,col,const_cast<char*>(name.c_str()));
 
   }
+
+  int LpGlpk::_colByName(const std::string& name) const
+  {
+    int k = lpx_find_col(lp, const_cast<char*>(name.c_str()));
+    return k > 0 ? k : -1; 
+  }
+
   
   void LpGlpk::_setRowCoeffs(int i, ConstRowIterator b, ConstRowIterator e) 
   {
@@ -142,7 +150,7 @@
     lpx_set_mat_row(lp, i, values.size() - 1, &indices[0], &values[0]);
   }
 
-  void LpGlpk::_getRowCoeffs(int i, RowIterator b) 
+  void LpGlpk::_getRowCoeffs(int i, RowIterator b) const
   {
     int length = lpx_get_mat_row(lp, i, 0, 0);
     
@@ -173,7 +181,7 @@
     lpx_set_mat_col(lp, i, values.size() - 1, &indices[0], &values[0]);
   }
 
-  void LpGlpk::_getColCoeffs(int i, ColIterator b) 
+  void LpGlpk::_getColCoeffs(int i, ColIterator b) const
   {
     int length = lpx_get_mat_col(lp, i, 0, 0);
     
@@ -247,7 +255,7 @@
     }
   }
 
-  LpGlpk::Value LpGlpk::_getCoeff(int row, int col)
+  LpGlpk::Value LpGlpk::_getCoeff(int row, int col) const
   {
 
     int length=lpx_get_mat_row(lp, row, 0, 0);
@@ -312,7 +320,7 @@
 
   }
 
-  LpGlpk::Value LpGlpk::_getColLowerBound(int i)
+  LpGlpk::Value LpGlpk::_getColLowerBound(int i) const
   {
     int b=lpx_get_col_type(lp, i);
       switch (b) {
@@ -369,7 +377,7 @@
     }
   }
 
-  LpGlpk::Value LpGlpk::_getColUpperBound(int i)
+  LpGlpk::Value LpGlpk::_getColUpperBound(int i) const
   {
     int b=lpx_get_col_type(lp, i);
       switch (b) {
@@ -414,7 +422,7 @@
 
   }
 
-  void LpGlpk::_getRowBounds(int i, Value &lb, Value &ub)
+  void LpGlpk::_getRowBounds(int i, Value &lb, Value &ub) const
   {
 
     int b=lpx_get_row_type(lp, i);
@@ -444,7 +452,7 @@
     lpx_set_obj_coef(lp, i, obj_coef);
   }
 
-  LpGlpk::Value LpGlpk::_getObjCoeff(int i){
+  LpGlpk::Value LpGlpk::_getObjCoeff(int i) const {
     //i=0 means the constant term (shift)
     return lpx_get_obj_coef(lp, i);
   }
@@ -472,26 +480,27 @@
     }
   }
 
-  LpGlpk::Value LpGlpk::_getPrimal(int i)
+  LpGlpk::Value LpGlpk::_getPrimal(int i) const
   {
     return lpx_get_col_prim(lp,i);
   }
 
-  LpGlpk::Value LpGlpk::_getDual(int i)
+  LpGlpk::Value LpGlpk::_getDual(int i) const
   {
     return lpx_get_row_dual(lp,i);
   }
   
-  LpGlpk::Value LpGlpk::_getPrimalValue()
+  LpGlpk::Value LpGlpk::_getPrimalValue() const
   {
     return lpx_get_obj_val(lp);
   }
-  bool LpGlpk::_isBasicCol(int i) {
+  bool LpGlpk::_isBasicCol(int i) const
+  {
     return (lpx_get_col_stat(lp, i)==LPX_BS);
   }
   
  
-  LpGlpk::SolutionStatus LpGlpk::_getPrimalStatus()
+  LpGlpk::SolutionStatus LpGlpk::_getPrimalStatus() const
   {
     int stat=  lpx_get_status(lp);
     switch (stat) {
@@ -512,11 +521,8 @@
     }
   }
 
-  LpGlpk::SolutionStatus LpGlpk::_getDualStatus()
+  LpGlpk::SolutionStatus LpGlpk::_getDualStatus() const
   {
-//     std::cout<<"Itt megy: "<<lpx_get_dual_stat(lp)<<std::endl;
-//     std::cout<<"Itt a primal: "<<lpx_get_prim_stat(lp)<<std::endl;
-
     switch (lpx_get_dual_stat(lp)) {
     case LPX_D_UNDEF://Undefined (no solve has been run yet)
       return UNDEFINED;
@@ -538,7 +544,7 @@
     }
   }
 
-  LpGlpk::ProblemTypes LpGlpk::_getProblemType()
+  LpGlpk::ProblemTypes LpGlpk::_getProblemType() const
   {
       //int stat=  lpx_get_status(lp);
     int statp=  lpx_get_prim_stat(lp);
@@ -565,7 +571,7 @@
     lpx_set_obj_dir(lp, LPX_MIN);
   }
 
-  bool LpGlpk::_isMax()
+  bool LpGlpk::_isMax() const
   {
     return (lpx_get_obj_dir(lp)==LPX_MAX);
   }