From d43be0938c2a2fbc1499b0d0fa5e8680b2d07a19 Mon Sep 17 00:00:00 2001
From: Julien Thomas <jthomas@exosec.fr>
Date: Wed, 20 Nov 2013 15:48:06 +0100
Subject: [PATCH] Fix json output when printing infinity values

The printf of a rrd_value_t variable can output inf in case of an
infinity value. That inf value is not JSON valid, nor are Infinity,
NaN, Number.NEGATIVE_INFINITY or Number.POSITIVE_INFINITY.

This commit adds a test for infinity values by using isinf() and
outputs a null in such case.
---
 src/rrd_tool.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/rrd_tool.c b/src/rrd_tool.c
index 57e22ce0..3002d383 100644
--- a/src/rrd_tool.c
+++ b/src/rrd_tool.c
@@ -804,7 +804,7 @@ int HandleInputLine(
                     rrd_value_t newval = DNAN;
                     newval = *ptr;
                     if (json){
-                        if (isnan(newval)){
+                        if (isnan(newval) || isinf(newval)){
                             printf("null");                        
                         } else {
                             printf("%0.10e",newval);
-- 
2.47.2