Changeset 1376:8de0c1aeeb32 in lemon-0.x

Timestamp:

04/20/05 16:29:23 (20 years ago)

Author:

athos

Branch:

default

Phase:

public

Convert:

svn:c9d7d8f5-90d6-0310-b91f-818b3a526b0e/lemon/trunk@1821

Message:

_setObj function

Location:

src/lemon

Files:

• lp_base.h (modified) (1 diff)
• lp_glpk.cc (modified) (1 diff)
• lp_glpk.h (modified) (1 diff)

src/lemon/lp_base.h

@@ -435 +435 @@
     virtual void _setRowUpperBound(int i, Value value) = 0;
     virtual void _setObjCoeff(int i, Value obj_coef) = 0;
+    virtual void _setObj(int length,
+                         int  const * indices, 
+                         Value  const * values ) = 0;
     virtual SolveExitStatus _solve() = 0;
     virtual Value _getPrimal(int i) = 0;

src/lemon/lp_glpk.cc

@@ -264 +264 @@
   void LpGlpk::_setObjCoeff(int i, Value obj_coef)
   {
+    //i=0 means the constant term (shift)
     lpx_set_obj_coef(lp, i, obj_coef);
   }
 
+  void LpGlpk::_setObj(int length,
+                       int  const * indices, 
+                       Value  const * values )
+  {
+    Value new_values[1+lpx_num_cols()];
+    for (i=0;i<=lpx_num_cols();++i){
+      new_values[i]=0;
+    }
+    for (i=1;i<=length;++i){
+      new_values[indices[i]]=values[i];
+    }
+    
+    for (i=0;i<=lpx_num_cols();++i){
+      lpx_set_obj_coef(lp, i, new_values[i]);
+    }
+  }
 
   LpGlpk::SolveExitStatus LpGlpk::_solve()

src/lemon/lp_glpk.h

@@ -64 +64 @@
     virtual void _setRowUpperBound(int i, Value value);
     virtual void _setObjCoeff(int i, Value obj_coef);
+    virtual void _setObj(int length,
+                         int  const * indices, 
+                         Value  const * values ) = 0;
+
     ///\e