From 6fd1c5b4bfae9563f3e2ecf17e07c0812e5ebc59 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Dan=20=C4=8Cerm=C3=A1k?= <dan.cermak@cgc-instruments.com>
Date: Mon, 17 Sep 2018 09:24:29 +0200
Subject: [PATCH] [types] Fix check for finite numbers on Linux

On Linux we were merely checking whether f is finite, but that does
not cover the case f=NaN.
=> use isfinite instead which checks whether f != inf && f != NaN
---
 src/types.cpp | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/src/types.cpp b/src/types.cpp
index cb3df1f5..53bfae80 100644
--- a/src/types.cpp
+++ b/src/types.cpp
@@ -674,11 +674,10 @@ namespace Exiv2 {
     Rational floatToRationalCast(float f)
     {
 #if defined(_MSC_VER) && _MSC_VER < 1800
-        #define isinf(x) (!_finite(x))
-#elif __APPLE__
-        #define isinf(x) (isinf(x) || isnan(x))
+        if (!_finite(f)) {
+#else
+        if (!std::isfinite(f)) {
 #endif
-        if (isinf(f)) {
             return Rational(f > 0 ? 1 : -1, 0);
         }
         // Beware: primitive conversion algorithm