thank you so much Nick,
it's crystal clear now :)
++
nicolas
Le mer. 3 mars 2021 à 11:12, Nick Wellnhofer <wellnho...@aevum.de> a écrit :
> On 03/03/2021 09:30, nicolas bats wrote:
> > 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?
>
> No, the read callback is supposed to fill the buffer with up to 'length'
> bytes. Try something like:
>
> typedef struct {
> const char *ptr;
> size_t remaining;
> } myContext;
>
> static int
> myReadCallback(void *vcontext, char *buffer, int len) {
> myContext *context = vcontext;
>
> if (context->remaining < len)
> len = context->remaining;
> memcpy(buffer, context->ptr, len);
> context->ptr += len;
> context->remaining -= len;
>
> return len;
> }
>
> xmlDocPtr
> myReadMemory(const char *buffer, size_t size, const char *URL,
> const char *encoding, int options) {
> myContext context;
>
> context.ptr = buffer;
> context.remaining = size;
>
> return xmlReadIO(myReadCallback, NULL, &context, URL, encoding,
> options);
> }
>
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