* into a CDEF string. This function is used by rrd_dump.
* arguments:
* rpnc: an array of compact RPN operator nodes
- * rrd: a pointer an rrd header (only the ds_cnt and ds_def elements need
- * to be valid) for lookup of data source names by index
+ * ds_def: a pointer to the data source definition section of an RRD header
+ * for lookup of data source names by index
* str: out string, memory is allocated by the function, must be freed by the
* the caller */
void rpn_compact2str(rpn_cdefds_t *rpnc,ds_def_t *ds_def,char **str)