Re: Difference between a+b and bit32.band(a+b)

[waspoza <waspoza@...>]

On Mon, Sep 12, 2011 at 10:14 PM, Roberto Ierusalimschy
<roberto@inf.puc-rio.br> wrote:
>> >> Looks like io.lines can't read binary files. :(
>> >As mentioned, try the "*L" option.
>>
>> And don't forget to open the file in binary mode as well,
>> regardless of the Lua version.
>
> Actually, this is the only problem. In the original code, 'io.lines' is
> not reading lines, but blocks of 4K. That format should have no problems
> with binary data. So, the code could be like this:
>
>  if arg[1] then
> +   local file = assert(io.open (arg[1], 'rb'))
>    local x = sha2.new256()
> -   for b in io.lines(arg[1], 2^12) do
> +   for b in file:lines(2^12) do
>      x:add(b)
>    end
> +   file:close()
>    print(x:close())
>  end

On debian 64bit + luajit it gives bad checksums.