ALLSTRLEN
str = calloc(1, ALLSTRLEN);
snprintf(str, ALLSTRLEN - 1, "%d-%d", 0, numfibs - 1);
snprintf(str, ALLSTRLEN - 1, "%d", 0);
str0 = str = calloc(1, ALLSTRLEN);
snprintf(str, ALLSTRLEN - 1, "%d", defaultfib);