statsd plugin: Store values internally as double.

While the documentation states that "values should generally be integers", this
"should" is not taken in the strict RFC meaning. For compatibility with Etsy's
statsd, handle everything as a double up until the last possible moment.

diff --git a/src/statsd.c b/src/statsd.c
index 4a58f41..b697a34 100644 (file)
--- a/src/statsd.c
+++ b/src/statsd.c
@@ -54,7 +54,7 @@ typedef enum metric_type_e metric_type_t;
 struct statsd_metric_s
 {
   metric_type_t type;
-  int64_t value;
+  double value;
   latency_counter_t *latency;
   c_avl_tree_t *set;
   unsigned long updates_num;
@@ -136,7 +136,7 @@ static statsd_metric_t *statsd_metric_lookup_unsafe (char const *name, /* {{{ */
   return (metric);
 } /* }}} statsd_metric_lookup_unsafe */
 
-static int statsd_metric_set (char const *name, int64_t value, /* {{{ */
+static int statsd_metric_set (char const *name, double value, /* {{{ */
     metric_type_t type)
 {
   statsd_metric_t *metric;
@@ -158,7 +158,7 @@ static int statsd_metric_set (char const *name, int64_t value, /* {{{ */
   return (0);
 } /* }}} int statsd_metric_set */
 
-static int statsd_metric_add (char const *name, int64_t delta, /* {{{ */
+static int statsd_metric_add (char const *name, double delta, /* {{{ */
     metric_type_t type)
 {
   statsd_metric_t *metric;
@@ -184,7 +184,7 @@ static int statsd_parse_value (char const *str, value_t *ret_value) /* {{{ */
 {
   char *endptr = NULL;
 
-  ret_value->derive = (derive_t) strtoll (str, &endptr, /* base = */ 0);
+  ret_value->gauge = (gauge_t) strtod (str, &endptr);
   if ((str == endptr) || ((endptr != NULL) && (*endptr != 0)))
     return (-1);
 
@@ -205,7 +205,7 @@ static int statsd_handle_counter (char const *name, /* {{{ */
   scale.gauge = 1.0;
   if (extra != NULL)
   {
-    status = parse_value (extra + 1, &scale, DS_TYPE_GAUGE);
+    status = statsd_parse_value (extra + 1, &scale);
     if (status != 0)
       return (status);
 
@@ -213,7 +213,7 @@ static int statsd_handle_counter (char const *name, /* {{{ */
       return (-1);
   }
 
-  value.derive = 1;
+  value.gauge = 1.0;
   status = statsd_parse_value (value_str, &value);
   if (status != 0)
     return (status);
@@ -221,8 +221,7 @@ static int statsd_handle_counter (char const *name, /* {{{ */
   if (value.derive < 1)
     return (-1);
 
-  return (statsd_metric_add (name,
-        (int64_t) (((gauge_t) value.derive) / scale.gauge),
+  return (statsd_metric_add (name, (double) (value.gauge / scale.gauge),
         STATSD_COUNTER));
 } /* }}} int statsd_handle_counter */
 
@@ -232,15 +231,15 @@ static int statsd_handle_gauge (char const *name, /* {{{ */
   value_t value;
   int status;
 
-  value.derive = 0;
+  value.gauge = 0;
   status = statsd_parse_value (value_str, &value);
   if (status != 0)
     return (status);
 
   if ((value_str[0] == '+') || (value_str[0] == '-'))
-    return (statsd_metric_add (name, (int64_t) value.derive, STATSD_GAUGE));
+    return (statsd_metric_add (name, (double) value.gauge, STATSD_GAUGE));
   else
-    return (statsd_metric_set (name, (int64_t) value.derive, STATSD_GAUGE));
+    return (statsd_metric_set (name, (double) value.gauge, STATSD_GAUGE));
 } /* }}} int statsd_handle_gauge */
 
 static int statsd_handle_timer (char const *name, /* {{{ */
@@ -256,7 +255,7 @@ static int statsd_handle_timer (char const *name, /* {{{ */
   if (status != 0)
     return (status);
 
-  value = MS_TO_CDTIME_T (value_ms.derive);
+  value = MS_TO_CDTIME_T (value_ms.gauge);
 
   pthread_mutex_lock (&metrics_lock);