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-rw-r--r--libnetdata/storage_number/storage_number.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/libnetdata/storage_number/storage_number.h b/libnetdata/storage_number/storage_number.h
index af7d29f3a..da3ba23fa 100644
--- a/libnetdata/storage_number/storage_number.h
+++ b/libnetdata/storage_number/storage_number.h
@@ -55,6 +55,8 @@ typedef long double collected_number;
#define calculated_number_equal(a, b) (calculated_number_fabs((a) - (b)) < calculated_number_epsilon)
+#define calculated_number_isnumber(a) (!(fpclassify(a) & (FP_NAN|FP_INFINITE)))
+
typedef uint32_t storage_number;
#define STORAGE_NUMBER_FORMAT "%u"