Changeset 1458:7a483c1d38b5 in lemon-0.x for lemon/lp_glpk.cc

Timestamp:

06/09/05 11:49:48 (20 years ago)

Author:

athos

Branch:

default

Phase:

public

Convert:

svn:c9d7d8f5-90d6-0310-b91f-818b3a526b0e/lemon/trunk@1938

Message:

Not ready, but I commit it for simplicity.

File:

• lemon/lp_glpk.cc (modified) (3 diffs)

lemon/lp_glpk.cc

@@ -397 +397 @@
   LpGlpk::SolveExitStatus LpGlpk::_solve()
   {
-    int i=  lpx_simplex(lp);
+    int i =  lpx_simplex(lp);
     switch (i) {
     case LPX_E_OK: 
       return SOLVED;
-      break;
     default:
       return UNSOLVED;
@@ -421 +420 @@
   {
     int stat=  lpx_get_status(lp);
+    switch (stat) {
+    case LPX_UNDEF://Undefined (no solve has been run yet)
+      return UNDEFINED;
+    case LPX_NOFEAS://There is no feasible solution (primal, I guess)
+    case LPX_INFEAS://Infeasible 
+      return INFEASIBLE;
+    case LPX_UNBND://Unbounded
+      return INFINITE;
+    case LPX_FEAS://Feasible
+      return FEASIBLE;
+    case LPX_OPT://Feasible
+      return OPTIMAL;
+    default:
+      return UNDEFINED; //to avoid gcc warning
+      //FIXME error
+    }
+  }
+
+  LpGlpk::SolutionStatus LpGlpk::_getDualStatus()
+  {
+    int stat=  lpx_get_dual_stat(lp);
+    switch (stat) {
+    case LPX_D_UNDEF://Undefined (no solve has been run yet)
+      return UNDEFINED;
+    case LPX_D_NOFEAS://There is no feasible solution (primal, I guess)
+    case LPX_D_INFEAS://Infeasible 
+      return INFEASIBLE;
+    case LPX_FEAS://Feasible    
+      int stat2=  lpx_get_prim_stat(lp);
+      switch (stat2){
+      case LPX_P_NOFEAS:
+        return INFINITE;
+      case LPX_OPT:
+        return OPTIMAL;
+      default:
+        return FEASIBLE;
+      }
+    default:
+      return UNDEFINED; //to avoid gcc warning
+      //FIXME error
+    }
+  }
+
+  LpGlpk::ProblemTypes LpGlpk::_problemType()
+  {
+    int stat=  lpx_get_status(lp);
+    int statp=  lpx_get_prim_stat(lp);
+    int statd=  lpx_get_dual_stat(lp);
     switch (stat) {
     case LPX_UNDEF://Undefined (no solve has been run yet)
@@ -444 +491 @@
   }
 
-
   void LpGlpk::_setMax()
   {