Re: [Lua] printing a table

["Patrick Donnelly" <batrick.donnelly () gmail com>]

On Sat, Nov 22, 2008 at 5:51 PM, Ron <ron () skullsecurity net> wrote:
> Hi all,
>
> The newer methods I'm writing are modelled after the interface that
> Microsoft uses for the RPC calls. Unfortunately, this often means that
> the important data is 3 or 4 structs down. I was giving myself a
> headache trying to remember where everything goes, so I threw together a
> quick function to print out everything in a table:
>
> --
> ---Converts an arbitrary data type into a string. Will recursively convert
> -- tables.
> --
> --@param data   The data to convert.
> --@param indent (optional) The number of times to indent the line. Default
> --              is 0.
> --@return A string representation of a data, will be one or more full
> lines.
> function to_string(data, indent)
>    local str = ""
>
>    if(indent == nil) then
>        indent = 0
>    end
>
>    -- Check the type
>    if(type(data) == "string") then
>        str = str .. (" "):rep(indent) .. data .. "\n"
>    elseif(type(data) == "number") then
>        str = str .. (" "):rep(indent) .. data .. "\n"
>    elseif(type(data) == "boolean") then
>        if(data == true) then
>            str = str .. "true"
>        else
>            str = str .. "false"
>        end
>    elseif(type(data) == "table") then
>        local i, v
>        for i, v in pairs(data) do
>            -- Check for a table in a table
>            if(type(v) == "table") then
>                str = str .. (" "):rep(indent) .. i .. ":\n"
>                str = str .. to_string(v, indent + 2)
>            else
>                str = str .. (" "):rep(indent) .. i .. ": " ..
> to_string(v, 0)
>            end
>        end
>    else
>        print_debug(1, "Error: unknown data type: %s", type(data))
>    end
>
>    return str
> end
> --
> Does anybody know if there's an easier (or built-in) way to do this?
>
> I put this code in stdnse for now, on my branch at least.

This isn't really something needed for a script to do its job. So
putting it in the main branch is not something I would recommend.
Also, you may want to become familiar with the Lua wiki where you will
find a lot of useful code. For example, [1] has code to print a table

[1] http://lua-users.org/wiki/TableSerialization

Cheers,

-- 
-Patrick Donnelly

"One of the lessons of history is that nothing is often a good thing
to do and always a clever thing to say."

-Will Durant

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