MT#55283 properly support double value stats

Change-Id: Ibabccb95d7dde410018e85f515c3b46733af6a35

daemon/mqtt.c

@@ -477,6 +477,8 @@ static void mqtt_global_stats(JsonBuilder *json) {
 			json_builder_set_member_name(json, m->label);
 			if (m->is_int)
 				json_builder_add_int_value(json, m->int_value);
+			else if (m->is_double)
+				json_builder_add_double_value(json, m->double_value);
 			else
 				json_builder_add_string_value(json, m->value_short);
 		}

daemon/statistics.c

@@ -247,6 +247,10 @@ static void add_metric(GQueue *ret, const char *label, const char *desc, const c
 			m->is_int = 1;
 			m->int_value = va_arg(ap, long long);
 		}
+		else if (!strcmp(fmt1, "%.6f") || !strcmp(fmt1, "%.2f")) {
+			m->is_double = 1;
+			m->double_value = va_arg(ap, double);
+		}
 		va_end(ap);
 	}
 	metric_push(ret, m);
@@ -585,8 +589,8 @@ GQueue *statistics_gather_metrics(void) {
 
 			mn = g_strdup_printf("%sduration", ng_command_strings_short[i]);
 			lw = g_ascii_strdown(mn, -1);
-			METRICsva(lw, "%llu.%06llu", (unsigned long long) cur->cmd[i].time.tv_sec,
+			METRICs(lw, "%.6f", (double) cur->cmd[i].time.tv_sec +
-					(unsigned long long) cur->cmd[i].time.tv_usec);
+					(double) cur->cmd[i].time.tv_usec / 1000000.);
 			PROM("request_seconds_total", "counter");
 			PROMLAB("proxy=\"%s\",request=\"%s\"", sockaddr_print_buf(&cur->proxy),
 					ng_command_strings[i]);

include/statistics.h

@@ -93,11 +93,13 @@ struct stats_metric {
 	char *value_short;
 	char *value_long;
 	int64_t int_value;
+	double double_value;
 	int is_bracket;
 	int is_close_bracket;
 	int is_brace;
 	int is_follow_up;
 	int is_int;
+	int is_double;
 	const char *prom_name;
 	const char *prom_type;
 	char *prom_label;