This patch introduces a feature whereby rrdcached will disallow updates

[rrdtool.git] / src / rrd_nan_inf.c

diff --git a/src/rrd_nan_inf.c b/src/rrd_nan_inf.c
index f40555d..2914d1a 100644 (file)
--- a/src/rrd_nan_inf.c
+++ b/src/rrd_nan_inf.c
@@ -1,15 +1,40 @@
-#include "rrd_nan_inf.h"
+int       done_nan = 0;
+int       done_inf = 0;
 
-#if defined(WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
+double    dnan;
+double    dinf;
 
+#if defined(_WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
 #include <math.h>
+#include "rrd.h"
 
-double set_to_DNAN(void) { return (double)fmod(0.0,0.0); }
-double set_to_DINF(void) { return (double)fabs((double)log(0.0)); }
+#define NAN_FUNC (double)fmod(0.0,0.0)
+#define INF_FUNC (double)fabs((double)log(0.0))
 
 #else
+#include "rrd.h"
 
-double set_to_DNAN(void) { return (double)(0.0/0.0); }
-double set_to_DINF(void) { return (double)(1.0/0.0); }
+#define NAN_FUNC (double)(0.0/0.0)
+#define INF_FUNC (double)(1.0/0.0)
 
 #endif
+
+double rrd_set_to_DNAN(
+    void)
+{
+    if (!done_nan) {
+        dnan = NAN_FUNC;
+        done_nan = 1;
+    }
+    return dnan;
+}
+
+double rrd_set_to_DINF(
+    void)
+{
+    if (!done_inf) {
+        dinf = INF_FUNC;
+        done_inf = 1;
+    }
+    return dinf;
+}