Re: [xml] about xmlReadMemory()

[nicolas bats <sl1200mk2 gmail com>]

Hi Nick,

I've experimented with xmlReadIO and it's cool.

this message just to check I'm doing right:

-I register an xmlInputReadCallback of type: size_t myCallback(void* context, char* buffer, int length)

-I do my stuff in the callback and if data I use exceed the length of the buffer, I realloc it.

Is this schema good?

Do I need to set size_t as the return type of myCallback?

thank you for your enlightenment .

best regards,

nicolas

Le mar. 2 mars 2021 à 19:32, nicolas bats <sl1200mk2 gmail com> a écrit :

Thank you Nick for your answer, I'll give a try to xmlReadIO.

thanks again.

++

Le mar. 2 mars 2021 à 18:02, Nick Wellnhofer <wellnhofer aevum de> a écrit :

On 02/03/2021 16:28, nicolas bats via xml wrote:
> Hi,
> is there's a reason why xmlReadMemory
> <http://xmlsoft.org/html/libxml-parser.html#xmlReadMemory>() accepts int as
> the size of the array to transform to xmlDocPtr.
> no doubt there's one...

That's simply a design mistake. The API was created 20 years ago when 64-bit
systems were rare.

> and in that case how could I retrieve a xmlDocPtr from
> memory where size is type of size_t?

If you want to process memory buffers larger than INT_MAX, you can use
xmlReadIO with a custom read callback that uses a size_t to store the offset.

Nick