From b58ac757a89fe85468681dacd504190ef58d2d39 Mon Sep 17 00:00:00 2001
From: Krzysztof Gabis <kgabis@gmail.com>
Date: Thu, 2 Aug 2018 21:20:39 +0200
Subject: [PATCH] Using isnan and isinf macros if they are defined (fixes issue
 #104).

---
 parson.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/parson.c b/parson.c
index d0b7819..afbfd2d 100644
--- a/parson.c
+++ b/parson.c
@@ -53,6 +53,12 @@
 #undef malloc
 #undef free
 
+#if defined(isnan) && defined(isinf)
+#define IS_NUMBER_INVALID(x) (isnan((x)) || isinf((x)))
+#else
+#define IS_NUMBER_INVALID(x) (((x) * 0.0) != 0.0)
+#endif
+
 static JSON_Malloc_Function parson_malloc = malloc;
 static JSON_Free_Function parson_free = free;
 
@@ -1364,7 +1370,7 @@ JSON_Value * json_value_init_string(const char *string) {
 
 JSON_Value * json_value_init_number(double number) {
     JSON_Value *new_value = NULL;
-    if ((number * 0.0) != 0.0) { /* nan and inf test */
+    if (IS_NUMBER_INVALID(number)) {
         return NULL;
     }
     new_value = (JSON_Value*)parson_malloc(sizeof(JSON_Value));