+ div=1
+
+ while true; do
+ min=$(( (${ni#*x} * $unit) / $div - $slop ))
+
+ ls=''
+ lnew=''
+ skipped=0
+ for ce in $l; do
+ cn=${ce#*/}; cl=${ce%%/*}
+ cs=${cl#,}; cs=${cs#:}
+ case $cl in ,*) ls=$cs; continue;; esac
+ if [ $wantcount != 0 ]; then
+ if ! [ "$ls" ] || \
+ [ $(( $ls - $cs )) -ge $min ]; then
+ echo "keep (for $ni) $cn"
+ ce=,$ce
+ ls=$cs
+ wantcount=$(( $wantcount - 1 ))
+ else
+ skipped=$(( $skipped+1 ))
+ fi
+ fi
+ lnew="$lnew $ce"
+ done
+ l=$lnew
+
+ if [ $wantcount = 0 ]; then break; fi
+ printf "%s" "insufficient (for $ni) by $wantcount"
+ if [ $skipped = 0 ]; then echo; break; fi
+ div=$(( $div * 2 ))
+ echo " shortening interval ${div}x"
+ done
+
+ # s/([,:]+).*/:\1/g