[FFmpeg-devel] [PATCH V5 1/2] configure: sort decoder/encoder/filter/... names in alphabet order

[avih]

>  print_in_columns() {
> -    cols=$(expr $ncols / 24)
> -    cat | tr ' ' '\n' | sort | pr -r "-$cols" -w $ncols -t
> +    # the input should not contain chars such as '*',
> +    # otherwise, '*' will be expanded to be all files in the current
> +    # working directory which don't begin with a dot (`.`)
> +    set -- $(tr ' ' '\n' | sort)
> +    col_width=24
> +    if [ $ncols -lt $col_width ]; then
> +        col_width=$ncols
> +    fi
> +    cols=$(($ncols / $col_width))
> +    rows=$(($(($# + $cols - 1)) / $cols))
> +    cols_seq=$(seq $cols)
> +    rows_seq=$(seq $rows)
> +    for row in $rows_seq; do
> +        print_index=$row
> +        print_line=""
> +        for col in $cols_seq; do
> +            if [ $print_index -le $# ]; then
> +                eval print_line='"$print_line "${'$print_index'}'
> +            fi
> +            print_index=$(($print_index + $rows))
> +        done
> +        printf "%-${col_width}s" $print_line
> +        printf "\n"
> +    done | sed 's/ *$//'
> }

Looks good to me. No further comments (but I don't push).

Next time, know that you can use e.g. `$((x + y))` instead of `$(($x + $y))`,
though in this case it doesn't matter and not worth another version.