Try to parse timestamps as double, if int64 parse fails

nilmdb/server/rocket.c

@@ -409,12 +409,15 @@ static PyObject *Rocket_append_string(Rocket *self, PyObject *args)
 
 		/* Extract timestamp */
 		t64.i = strtoll(buf, &endptr, 10);
-		if (endptr == buf)
-			return raise_str(linenum, buf - linestart + 1,
-					 ERR_OTHER, "bad timestamp");
-		if (!isspace(*endptr))
-			return raise_str(linenum, buf - linestart + 1,
-					 ERR_OTHER, "timestamp isn't an int");
+		if (endptr == buf || !isspace(*endptr)) {
+			/* Try parsing as a double instead */
+			t64.d = strtod(buf, &endptr);
+			if (endptr == buf)
+				goto bad_timestamp;
+			if (!isspace(*endptr))
+				goto cant_parse_value;
+			t64.i = round(t64.d);
+		}
 		if (t64.i <= last_timestamp)
 			return raise_int(linenum, buf - linestart + 1,
 					 ERR_NON_MONOTONIC, t64.i);
@@ -497,6 +500,9 @@ static PyObject *Rocket_append_string(Rocket *self, PyObject *args)
 err:
 	PyErr_SetFromErrno(PyExc_OSError);
 	return NULL;
+bad_timestamp:
+	return raise_str(linenum, buf - linestart + 1,
+			 ERR_OTHER, "bad timestamp");
 cant_parse_value:
 	return raise_str(linenum, buf - linestart + 1,
 			 ERR_OTHER, "can't parse value");