Re: Inserting data in the middle of luaL_Buffer
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- Subject: Re: Inserting data in the middle of luaL_Buffer
- From: "Alexander Gladysh" <agladysh@...>
- Date: 2008年5月28日 02:01:03 +0400
On Wed, May 28, 2008 at 1:49 AM, Luiz Henrique de Figueiredo
<lhf@tecgraf.puc-rio.br> wrote:
>> <some-prefix><size><data1><data2>...<dataN><suffix>
>> The question is, is it possible, at least at "implementation-specific"
>> level to insert the number of elements after I have added all the data
>> to buffer?
> Push the prefix and nil and then open a buffer for the data. At the end,
> close the buffer, lua_replace the nil with the size and concat the 3 strings.
If I get it correctly, this would be at least two concat calls per
nesting level of data (each nesting level would have own prefix and
size written).
That is, for
root
-branch
-branch
I would have minimum 6 concat calls (counting concats done by buffer
facilities internally).
I'd like to minimize number of concats for performance reasons.
Thank you,
Alexander.