Changeset 470:81627fa1b007 in lemon-main

Timestamp:

01/14/09 16:55:29 (16 years ago)

Author:

Alpar Juttner <alpar@…>

Branch:

default

Phase:

public

Message:

Own support for isnan()

Location:

lemon

Files:

• lp_base.h (modified) (5 diffs)
• math.h (modified) (1 diff)

lemon/lp_base.h

@@ -598 +598 @@
       ///Is the constraint lower bounded?
       bool lowerBounded() const {
-        return _lb != -INF && !std::isnan(_lb);
+        return _lb != -INF && !isnan(_lb);
       }
       ///Is the constraint upper bounded?
       bool upperBounded() const {
-        return _ub != INF && !std::isnan(_ub);
+        return _ub != INF && !isnan(_ub);
       }
 
@@ -1667 +1667 @@
                                    const LpBase::Constr &c) {
     LpBase::Constr tmp(c);
-    LEMON_ASSERT(std::isnan(tmp.lowerBound()), "Wrong LP constraint");
+    LEMON_ASSERT(isnan(tmp.lowerBound()), "Wrong LP constraint");
     tmp.lowerBound()=n;
     return tmp;
@@ -1679 +1679 @@
   {
     LpBase::Constr tmp(c);
-    LEMON_ASSERT(std::isnan(tmp.upperBound()), "Wrong LP constraint");
+    LEMON_ASSERT(isnan(tmp.upperBound()), "Wrong LP constraint");
     tmp.upperBound()=n;
     return tmp;
@@ -1691 +1691 @@
                                    const LpBase::Constr &c) {
     LpBase::Constr tmp(c);
-    LEMON_ASSERT(std::isnan(tmp.upperBound()), "Wrong LP constraint");
+    LEMON_ASSERT(isnan(tmp.upperBound()), "Wrong LP constraint");
     tmp.upperBound()=n;
     return tmp;
@@ -1703 +1703 @@
   {
     LpBase::Constr tmp(c);
-    LEMON_ASSERT(std::isnan(tmp.lowerBound()), "Wrong LP constraint");
+    LEMON_ASSERT(isnan(tmp.lowerBound()), "Wrong LP constraint");
     tmp.lowerBound()=n;
     return tmp;

lemon/math.h

@@ -56 +56 @@
   const long double SQRT1_2 = 0.7071067811865475244008443621048490L;
 
+  ///Check whether the parameter is NaN or not
+  
+  ///This function checks whether the parameter is NaN or not.
+  ///Is should be equivalent with std::isnan(), but it is not
+  ///provided by all compilers.
+  inline bool isnan(double v)
+    {
+      return v!=v;
+    }
 
   /// @}