From 80cf5e3d7965830d14a5a5bb4a1232c5e95a932b Mon Sep 17 00:00:00 2001
From: Ward Fisher <wfisher@ucar.edu>
Date: Sat, 29 Aug 2020 18:42:20 -0600
Subject: [PATCH] Modify isnan() operation

---
 libnczarr/zcvt.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/libnczarr/zcvt.c b/libnczarr/zcvt.c
index c851653b2..62c234471 100644
--- a/libnczarr/zcvt.c
+++ b/libnczarr/zcvt.c
@@ -355,9 +355,9 @@ NCZ_stringconvert(nc_type typeid, size_t len, void* data0, NCjson** jdatap)
 #else
 		if(isnan(d))
 		     special = "NaN";
-		else if(isinf(d) < 0)
+		else if(isinf(d) && d < 0)
 		      special = "-Infinity";
-		else if(isinf(d) > 0)
+		else if(isinf(d) && d > 0)
 		      special = "Infinity";
 		else {}
 #endif
@@ -368,7 +368,7 @@ NCZ_stringconvert(nc_type typeid, size_t len, void* data0, NCjson** jdatap)
 		break;
 	    default: stat = NC_EINTERNAL; goto done;
 	    }
-	    if(special) {nullfree(str); str = strdup(special);}	    
+	    if(special) {nullfree(str); str = strdup(special);}
 	    jvalue->value = str;
 	    str = NULL;
 	    nclistpush(jdata->contents,jvalue);