changed _isnan() and _finite() to std::isnan() and std::isfinite(), for GCC compat

Common/Include/fileutil.h

@@ -8,10 +8,6 @@
 #define _FILEUTIL_
 
 #include <stdio.h>
-#ifdef	_WIN32
-#define isfinite(x) _finite(x)
-#define isnan(x) _isnan(x)
-#endif
 #ifdef __unix__
 #include <sys/types.h>
 #include <sys/stat.h>

DataReader/HTKMLFReader/ssematrix.h

@@ -1147,7 +1147,7 @@ public:
 #else
         const auto & us = *this;
         foreach_coord (i, j, us)
-            if (_isnan (us(i,j)))
+            if (std::isnan (us(i,j)))
             {
                 fprintf (stderr, "hasnan: NaN detected at %s (%d,%d)\n", name, i, j);
                 return true;
@@ -1166,7 +1166,7 @@ public:
         foreach_coord (i, j, us)
         {
             auto val = us(i,j);
-            if (_isnan (val) || !_finite (val))
+            if (std::isnan (val) || !std::isfinite (val))
                 n++;
         }
         return n;

MachineLearning/cn/SGD.h

@@ -1360,7 +1360,7 @@ protected:
 				double eGradNum = (mbEvalCriPos - mbEvalCriNeg)/(ePos - eNeg);
 			    ElemType threshold = (ElemType) pow((ElemType)10.0, max((ElemType)0.0, ceil(log10(min(fabs(eGradErr), fabs(eGradNum)))))-(int)m_gradientCheckSigDigit);
 			    ElemType diff = (ElemType) fabs(eGradErr - eGradNum);
-                bool wrong = (_isnan(diff) || diff > threshold);
+                bool wrong = (std::isnan(diff) || diff > threshold);
                 if (wrong)
 				{
                     fprintf (stderr, "\nd%ws Numeric gradient = %e, Error BP gradient = %e\n", node->NodeName().c_str(), eGradNum, eGradErr);

Math/Math/Matrix.cpp

@@ -3915,7 +3915,7 @@ namespace Microsoft { namespace MSR { namespace CNTK {
         const Matrix<ElemType> & us = *this;
 
         foreach_coord (i, j, us)
-            if (isnan(us(i, j)))
+            if (std::isnan(us(i, j)))
             {
                 fprintf (stderr, "hasnan: NaN detected at %s (%ld,%ld)\n", name, i, j);
                 return true;
@@ -3935,7 +3935,7 @@ namespace Microsoft { namespace MSR { namespace CNTK {
         foreach_coord (i, j, us)
         {
             auto val = us(i,j);
-            if (isnan (val) || !isfinite (val))
+            if (std::isnan (val) || !std::isfinite (val))
                 n++;
         }
         return n;