[gdome]Re: [PATCH] Add memory buffer length param to SaveToMemory*

[Blair Zajac <blair orcaware com>]

Blair Zajac wrote:
> 
> Hello,
> 
> Right now the gdome2 saveDocToMemory and saveDocToMemoryEnc functions
> only return to the caller the memory buffer created by libxml2, even
> though libxml2 returns the length of that buffer.
> 
> I'm using gmetadom Ocaml bindings (gmetadom uses gdome2) and need to
> copy an XSLT generated file from the gmetadom/gdome2 to Ocaml string.
> 
> Right now the Ocaml bindings scan the buffer to find the \0 and then
> make another pass to copy the buffer, which is a waste of CPU time.
> 
> The attached patch modifies gdome2 to add an additional int * parameter
> to the *saveDocToMemory* calls.

Regarding freeing the memory returned by gdome2 (from libxml2 in this
case), two thoughts:

1) Provide a free() function that calls the vtable function.
2) Have *saveDocToMemory* return a function pointer to the proper
   free() to use.  The caller saves this pointer until it's needed.

If the second method is better, I can modify this patch to do that.

Let me know.

Best,
Blair

-- 
Blair Zajac <blair orcaware com>
Plots of your system's performance - http://www.orcaware.com/orca/