1 files changed, 10 insertions, 0 deletions
diff --git a/rrdformat/rrdbinary/types.go b/rrdformat/rrdbinary/types.go
index 0bf4913..a6fa881 100644
--- a/rrdformat/rrdbinary/types.go
+++ b/rrdformat/rrdbinary/types.go
@@ -2,6 +2,7 @@ package rrdbinary
 
 import (
 	"encoding/binary"
+	"encoding/json"
 	"math"
 )
 
@@ -32,6 +33,15 @@ type EOF struct{}  // 0 bytes
 func (u Unival) AsUint64() uint64   { return uint64(u) }
 func (u Unival) AsFloat64() float64 { return math.Float64frombits(uint64(u)) }
 
+// MarshalJSON is for my own debugging.
+func (f Float) MarshalJSON() ([]byte, error) {
+	raw := float64(f)
+	if math.IsNaN(raw) {
+		return json.Marshal("NaN")
+	}
+	return json.Marshal(raw)
+}
+
 // Statically assert that each of the above types implements the
 // 'unmarshaler' interface.
 var _ unmarshaler = func() *String { return nil }()