+ if(getenv("DROPIN")) dropin = atof(getenv("DROPIN"));
+ if(getenv("DROPOUT")) dropout = atof(getenv("DROPOUT"));
+ if(getenv("DROPFROM")) dropfrom = atoi(getenv("DROPFROM"));
+ if(getenv("DROPTO")) dropto = atoi(getenv("DROPTO"));
+ if(getenv("REORDER")) reorder = atof(getenv("REORDER"));
+ if(getenv("REORDER_DIST")) reorder_dist = atoi(getenv("REORDER_DIST"));
+
+ char *reference_filename = getenv("REFERENCE");
+ if(reference_filename)
+ reference = fopen(reference_filename, "r");
+
+ if(dropto < dropfrom)
+ dropto = 1 << 30;