xmlroff-list

[xmlroff] Re: xmlroff-list digest, Vol 1 #145 - 2 msgs

[Bruno S. <bru...@ya...>]

hello Tony,

thank you for the fast reply.

I've tried to do as you said. I cannot get past this
error message:
 variable `fo_invoice_result_tree' has initializer but
incomplete type
error: storage size of `fo_invoice_result_tree' isn't
known

fo_invoice_result_tree is declared as a FoXmlDoc.

Any idea ?




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> Today's Topics:
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>    1. hello (Bruno Sadiez)
>    2. Re: hello (Tony Graham)
> 
> --__--__--
> 
> Message: 1
> Date: Tue, 5 Apr 2005 19:26:11 +0200 (CEST)
> From: Bruno Sadiez <bru...@ya...>
> To: xml...@li...
> Subject: [xmlroff] hello
> 
> I'm currently working  on a project for a
> philanthropic organization. I need to write an
> invoicing application in C. I am not a professional
> developer. 
> What I need to do is fetch data from a database and
> issue PDF invoices.
> I'm using Daniel Veillard's Libxml2 library and I
> can
> issue XML data files with all the required billing
> details. I have written an XSL file with formating
> objects. 
> As this project is supposed to issue many thousand
> invoices at the end of each month, performance is a
> concern. I would like to be able to
> 		Load my XSLFO file only once
> 		Apply it to many thousand dynamically created XML
> data trees.
> 
> 
> 		my code goes:
> 
> 		xmlDocPtr invoice_doc = NULL;
> 		(..... )
> 
> 		invoice_doc = xmlNewDoc(BAD_CAST "1.0");
>  		invoice_root_node = xmlNewNode(NULL, BAD_CAST
> "invoice");
>  		xmlDocSetRootElement(invoice_doc,
> invoice_root_node);
> 
> then I populate the tree with the required billing
> details.
> 
> How is it possible to dynamically transform that
> memory tree into a PDF. I would like to avoid
> writing
> xml data files to disk.
> 
> I hope I'm being clear.
> 
> Thanks in advance
> 
> 
> 	
> 
> 	
> 		
>
__________________________________________________________________
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> 
> --__--__--
> 
> Message: 2
> Date: Wed, 06 Apr 2005 04:26:56 +0100
> From: Tony Graham <Ton...@Su...>
> Subject: Re: [xmlroff] hello
> To: xml...@li...
> 
> Welcome to the xmlroff-list, and thank you for your
> interest in
> xmlroff.
> 
> Bruno Sadiez <bru...@ya...> writes:
> > I'm currently working  on a project for a
> > philanthropic organization. I need to write an
> > invoicing application in C. I am not a
> professional
> > developer. 
> > What I need to do is fetch data from a database
> and
> > issue PDF invoices.
> > I'm using Daniel Veillard's Libxml2 library and I
> can
> > issue XML data files with all the required billing
> > details. I have written an XSL file with formating
> > objects. 
> > As this project is supposed to issue many thousand
> > invoices at the end of each month, performance is
> a
> > concern. I would like to be able to
> > 		Load my XSLFO file only once
> > 		Apply it to many thousand dynamically created
> XML
> > data trees.
> >
> >
> > 		my code goes:
> >
> > 		xmlDocPtr invoice_doc = NULL;
> > 		(..... )
> >
> > 		invoice_doc = xmlNewDoc(BAD_CAST "1.0");
> >  		invoice_root_node = xmlNewNode(NULL, BAD_CAST
> > "invoice");
> >  		xmlDocSetRootElement(invoice_doc,
> > invoice_root_node);
> >
> > then I populate the tree with the required billing
> > details.
> >
> > How is it possible to dynamically transform that
> > memory tree into a PDF. I would like to avoid
> writing
> > xml data files to disk.
> >
> > I hope I'm being clear.
> 
> Yes, you are.
> 
> The short answer is that you can do what you want.
> 
> The public interfaces for the libfo library work on
> filenames for the
> XML input and the XSLT stylesheet (if any) so
> someone using the
> library doesn't have to know or care about libxml2
> or libxslt.
> 
> The public interfaces work on either strings or
> FoXmlDoc objects that
> are really just GObject wrappers of libxml2.
> 
> The FoXSLTFormatter wrapper for libxslt currently
> requires a string
> for the filename for the XSLT stylesheet, which is
> possibly
> shortsighted of me.
> 
> You can, however, do the transformation yourself
> using libxslt and
> then create a FoXmlDoc from the result of your
> transformation using
> fo_xml_doc_set_xml_doc() from fo-xml-doc-private.h:
> 
>    FoXmlDoc result_tree = fo_xml_doc_new ();
>    fo_xml_doc_set_xml_doc (result_tree,
> your_xml_doc_ptr);
> 
> You can then use your 'result_tree' with an
> FoXSLFormatter as in
> xmlroff-libfo.c from the libfo-examples package.
> 
> The other thing to look at is using fo_libfo_init2()
> and supplying
> your own malloc, etc. so that libfo and libxslt use
> the same heap.
> 
> You are trying something that AFAIK hasn't been
> tried before, so I'm
> interested to know how you get on.  I do expect that
> you will find
> that xmlroff has memory leaks, but if you can
> identify them, we can
> look to fixing them.
> 
> Regards,
> 
> 
> Tony.
> 
> 
> 
> 
> --__--__--
> 
> 
=== message truncated === 


	

	
		
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Re: [xmlroff] Re: xmlroff-list digest, Vol 1 #145 - 2 msgs

[Stefan S. <se...@sy...>]

Bruno Sadiez wrote:
> hello Tony,
> 
> thank you for the fast reply.
> 
> I've tried to do as you said. I cannot get past this
> error message:
>  variable `fo_invoice_result_tree' has initializer but
> incomplete type
> error: storage size of `fo_invoice_result_tree' isn't
> known
> 
> fo_invoice_result_tree is declared as a FoXmlDoc.

This usually means the type has been forward-declared,
i.e. some #include may be missing to expose a real
declaration to the code using it.

Regards,
		Stefan

Re: [xmlroff] Re: xmlroff-list digest, Vol 1 #145 - 2 msgs

[Tony G. <Ton...@Su...>]

Stefan Seefeld <se...@sy...> writes:
> Bruno Sadiez wrote:
>> hello Tony,
>> thank you for the fast reply.
>> I've tried to do as you said. I cannot get past this
>> error message:
>>  variable `fo_invoice_result_tree' has initializer but
>> incomplete type
>> error: storage size of `fo_invoice_result_tree' isn't
>> known
>> fo_invoice_result_tree is declared as a FoXmlDoc.
>
> This usually means the type has been forward-declared,
> i.e. some #include may be missing to expose a real
> declaration to the code using it.

Stefan is correct.

The problem may be in the two lines of code in my previous post where
I omitted a '*'.  I should have used a FoXmlDoc*, not a FoXmlDoc:

   FoXmlDoc *result_tree = fo_xml_doc_new ();
   fo_xml_doc_set_xml_doc (result_tree, your_xml_doc_ptr);

If that is not the problem, please post the function containing the
problem and the complete compiler error message so we have a better
chance of working out the problem.  Please note, however, that I am
very short of time for the rest of this week and I will have limited
email ability next week.

Regards,


Tony.