Move the isfinite checks in the wms provider to the qgsrect class and

use numeric_limits instead of the C99 isfinite macro/function. Remove
the check for a functioning isfinite macro/function


git-svn-id: http://svn.osgeo.org/qgis/trunk/qgis@5894 c8812cc2-4d05-0410-92ff-de0c093fc19c

configure.in

@@ -100,17 +100,6 @@ dnl GDAL/OGR
 dnl ---------------------------------------------------------------------------
 AQ_CHECK_GDAL
 
-dnl ---------------------------------------------------------------------------
-dnl Whether to use isfinite or std::isfinite
-dnl ---------------------------------------------------------------------------
-have_stdisfinite=no
-AC_MSG_CHECKING([[<cmath> for std::isfinite]])
-AC_COMPILE_IFELSE(AC_LANG_PROGRAM([[#include <cmath>]], [[ std::isfinite(0) ]]),
-        [[have_stdisfinite=yes]
-         AC_DEFINE(HAVE_STDISFINITE,1,[Define to 1 if std::isfinite is available])
-        ], [])
-AC_MSG_RESULT([[$have_stdisfinite]])
-
 dnl ---------------------------------------------------------------------------
 dnl GEOS
 dnl ---------------------------------------------------------------------------

src/core/qgsrect.cpp

@@ -19,9 +19,7 @@
 #include <iostream>
 #include <algorithm>
 #include <cmath>
-#ifdef WIN32
 #include <limits>
-#endif
 #include <QString>
 #include <QTextStream> 
 
@@ -283,3 +281,26 @@ void QgsRect::unionRect(const QgsRect& r)
   if (r.yMin() < yMin()) setYmin(r.yMin());
   if (r.yMax() > yMax()) setYmax(r.yMax());
 }
+
+bool QgsRect::isFinite() const
+{
+  if (std::numeric_limits<double>::has_infinity)
+  {
+    if (xmin == std::numeric_limits<double>::infinity() ||
+        xmax == std::numeric_limits<double>::infinity() ||
+        ymin == std::numeric_limits<double>::infinity() ||
+        ymax == std::numeric_limits<double>::infinity())
+      return false;
+  }
+  // Only check for quiet NaN, as the signalling NaN will have caused
+  // an exception well before we get the chance to get here.
+  if (std::numeric_limits<double>::has_quiet_NaN)
+  {
+    if (xmin == std::numeric_limits<double>::quiet_NaN() ||
+        xmax == std::numeric_limits<double>::quiet_NaN() ||
+        ymin == std::numeric_limits<double>::quiet_NaN() ||
+        ymax == std::numeric_limits<double>::quiet_NaN())
+      return false;
+  }
+  return true;
+}

src/core/qgsrect.h

@@ -111,6 +111,10 @@ class QgsRect
 
     /** updates rectangle to include passed argument */
     void unionRect(const QgsRect& rect);
+
+    /** Returns true if the rectangle has finite boundaries. Will
+        return false if any of the rectangle boundaries are NaN or Inf. */
+    bool isFinite() const;
 
 protected:
 

src/providers/wms/qgswmsprovider.cpp

@@ -18,14 +18,6 @@
 
 /* $Id$ */
 
-#include "qgsconfig.h"
-
-#ifdef HAVE_STDISFINITE
-  #include <cmath>
-#else
-  #include <math.h>
-#endif
-
 #include "qgslogger.h"
 #include "qgswmsprovider.h"
 
@@ -1954,16 +1946,10 @@ bool QgsWmsProvider::calculateExtent()
       }
 
     //make sure extent does not contain 'inf' or 'nan'
-#ifdef HAVE_STDISFINITE
-    if(!std::isfinite(extent.xMin()) || !std::isfinite((int)extent.yMin()) || !std::isfinite(extent.xMax()) || \
-       !std::isfinite((int)extent.yMax()))
-#else
-    if(!isfinite(extent.xMin()) || !isfinite((int)extent.yMin()) || !isfinite(extent.xMax()) || \
-       !isfinite((int)extent.yMax()))
-#endif
-      {
-	continue;
-      }
+    if (!extent.isFinite())
+    {
+      continue;
+    }
 
     // add to the combined extent of all the active sublayers
     if (firstLayer)