Re: vim function argument

I complete the function as follow, now I want to add radix option, but I don't know how to get width. Can you help me complement it

function InsertNumber(start, end,...) " step,is_column_first_0_padding,radix(b,d,o,x)
let l:i = a:start
let l:curr_line = 0
if a:0 == 0 " a:0 extra argument numbers
let l:step = 1
else
let l:step = a:1 " the first extra argument
endif
if a:0 == 2
let l:is_padding = 0
else
let l:is_padding = 1 "default padding
endif
if a:0 == 3
let l:radix = a:3
else
let l:radix = ""
endif
if l:radix == "b"
elseif l:radix == "o"
elseif l:radix == "x"
else
let l:width = float2nr(trunc(log10(a:end))) + 1
let l:format = '%0'.l:width.'d'
endif
while l:i <= a:end
if l:step <= 0
echo "Error: step cannot <= 0."
break
endif
if l:is_padding == 1
call append(curr_line, printf(l:format, l:i))
else
call append(curr_line, l:i)
endif
let l:i += l:step
let l:curr_line += 1
endwhile
endfunction

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