Merge pull request #236 from Jopie64/master

Silence some performance warnings in Visual Studio

format.h

@@ -28,7 +28,13 @@
 #ifndef FMT_FORMAT_H_
 #define FMT_FORMAT_H_
 
+#if defined _MSC_VER && _MSC_VER <= 1500
+typedef unsigned int       uint32_t;
+typedef unsigned long long uint64_t;
+typedef long long          intmax_t;
+#else
 #include <stdint.h>
+#endif
 
 #include <cassert>
 #include <cmath>
@@ -256,7 +262,7 @@ class numeric_limits<fmt::internal::DummyInt> :
     // isinf macro > std::isinf > ::isinf > fmt::internal::isinf
     if (check(sizeof(isinf(x)) == sizeof(bool) ||
               sizeof(isinf(x)) == sizeof(int))) {
-      return isinf(x);
+      return !!isinf(x);
     }
     return !_finite(static_cast<double>(x));
   }
@@ -267,7 +273,7 @@ class numeric_limits<fmt::internal::DummyInt> :
     using namespace fmt::internal;
     if (check(sizeof(isnan(x)) == sizeof(bool) ||
               sizeof(isnan(x)) == sizeof(int))) {
-      return isnan(x);
+      return !!isnan(x);
     }
     return _isnan(static_cast<double>(x)) != 0;
   }
@@ -276,7 +282,7 @@ class numeric_limits<fmt::internal::DummyInt> :
   static bool isnegative(double x) {
     using namespace fmt::internal;
     if (check(sizeof(signbit(x)) == sizeof(int)))
-      return signbit(x);
+      return !!signbit(x);
     if (x < 0) return true;
     if (!isnotanumber(x)) return false;
     int dec = 0, sign = 0;