+sds *sdssplitargs(char *line, int *argc);
+void sdssplitargs_free(sds *argv, int argc);
+sds sdsmapchars(sds s, char *from, char *to, size_t setlen);
+
+/* Low level functions exposed to the user API */
+sds sdsMakeRoomFor(sds s, size_t addlen);
+void sdsIncrLen(sds s, int incr);