libxmlplusplus-general — Open discusions about libXML++

[libxml++] on_characters not being callled

[John H. <jo...@ha...>]

I am moving a project component from the C expat xml parser too libxmlc++.

Essentially I am looking to override the do_characters method in my own 
Parser object to extract the values of the elements (pretty much like 
you would do in expat).

Looking at the sax_parser example it appears the on_characters function 
is not being called during the document parsing?

I am probably missing something obvious here.....but understanding why 
would be helpful.

Thanks
John

[libxml++] information in libxml++

[<iba...@po...>]

i word with parser xml sax, but i want the libxml.h in my compilttor
visual studio 7.
you send me URL who this librairie exist !!

iba...@po...

thank you

Re: [libxml++] Makefile

[Rasmus K. <ka...@kt...>]

>>>>> "SR" == Simon Reye <sr...@in...> writes:

Hi!

 SR> I'm rather new to c++ development on Linux and am having trouble
 SR> just compiling and linking some of the simple example programs
 SR> for libxml++.  Does anyone have a simple Makefile that has the
 SR> necessary include and library settings to build a libxml++
 SR> program.

The pkg-config system takes care of all the hard stuff for you.
Assuming you use gmake, something like this, where progname is the
program you want to compile should be fine:

CXXFLAGS+= $(shell pkg-config --cflags libxml++-2.6)
LDFLAGS+= $(shell pkg-config --libs libxml++-2.6)

OBJS= ... local .o files ...

progname: $(OBJS)
        $(CXX) -o $@ $(LDFLAGS) $(OJBS)


-- 
Rasmus Kaj --+-- ra...@ka... --+-- http://www.stacken.kth.se/~kaj/
I'm on a seafood diet -- I see food and I eat it

[libxml++] Makefile

[Simon R. <sr...@in...>]

I'm rather new to c++ development on Linux and am having trouble just
compiling and linking some of the simple example programs for libxml++.
Does anyone have a simple Makefile that has the necessary include and
library settings to build a libxml++ program.

Thanks

Simon

[libxml++] need help using libxml++

[<inf...@we...>]

hi, i am new to libxml++ and i need a little help.
i already tried to use the code from the examples on the website but i dont get it work.

i have a xml file like that

<?xml version="1.0" encoding="ISO-8859-1" ?> 
<stuff>
 <myvalue>entered</myvalue>
 <timestamp>1113483283</timestamp>
 <count>12</pms>
</stuff>

not all nodes must be there, so i only want to read these values which are present and put these into strings.

i'd like to programm something like that (pseudo code):

foreach( xmlnode in rootnode.get_children() ) {
 if( xmlnode.name == "myvalue")
    myvalue == xmlnode.text;
 if( xmlnode.name == "timestamp")
    timestamp == xmlnode.text;
 if( xmlnode.name == "count")
    count == xmlnode.text;
}

could anyone help with that and colud give me a code snippet for that, please?

greets Christian
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[libxml++] Bug Fix

[tom j. <lis...@ya...>]

Hi all.

This refers to my bug
http://sourceforge.net/tracker/index.php?func=detail&aid=1175291&group_id=12999&atid=112999

I cannot compile libxml++ using g++ and the -pedantic
argument.  There seem to be a number of extra ";"'s.

My research backs up that they shouldn't be there.  If
I take them out my programs compile fine.

I am happy to fix this for you.  I can provide patches
or write straight to the CVS.  Either way you'll have
to let me know the details of what you expect.

If you would like this help simple let me know :)


		
__________________________________ 
Do you Yahoo!? 
Yahoo! Small Business - Try our new resources site!
http://smallbusiness.yahoo.com/resources/

[libxml++] ANNOUNCE: libxml++ 2.10.0

[Christophe de V. <cde...@ne...>]

*** libxml++

  libxml++ is a C++ wrapper for the libxml XML parser library. It has SAX
  and DOM-like APIs, but does not attempt to conform exactly to the DOM
  specifications because they are not aimed at C++. Its API is much
  simpler than the underlying libxml C API.

*** Changes

No significant changes since 2.9.2:

* First stable 2.10.x release
* Fixed documentation packaging problems

*** Download

You can download libxml++ from here:
http://libxmlplusplus.sourceforge.net/


Christophe de Vienne

[libxml++] Re: Glib::ConvertError in a simple document.

[PS <blo...@ma...>]

iconv -l | grep -i windows-1251
CP1251 MS-CYRL WINDOWS-1251


so, it's installed... seems to be some other problem

Re: [libxml++] Glib::ConvertError in a simple document.

[Jonathan W. <co...@co...>]

On Wed, Mar 02, 2005 at 06:45:13PM +0000, Jonathan Wakely wrote:

> On Wed, Mar 02, 2005 at 11:46:23AM -0500, PS wrote:
> 
> > Hello
> > I compiled libxml++ and used the first example from manual (the dom parser)
> > When I run in on windows everything worked ok, but on unix (I use 
> > FreeBSD 4.11) it gave me errors:
> > 
> > ...
> > ...
> >     Node name = title
> > Node name = title
> >          line = 8
> > 
> >       Text Node
> > terminate called after throwing an instance of 'Glib::ConvertError'
> >       text = "Abort (core dumped)
> > 
> > 
> > the sample xml file was:
> > <?xml version="1.0" encoding="windows-1251"?>
> > <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
> >         "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
> > <html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
> > <head>
> > 	<title>???????????????????????? ????????????????????...</title>
> > 
> > So, as you might see, it coredumps just when it attempted to recode non 
> > english chars inside title.
> > 
> > 
> > What's wrong with this?? Thank you
> 
> It's possible that you don't have the right libraries installed to
> support conversion from windows-1252 - FreeBSD often installs a minimal
> set of libs. Try this:
> 
>     iconv -l | grep -i windows-1252

Sorry - that should obviously be windows-1251, not 1252

I have windows-1252 on the brain right now :)

jon

-- 
"Keep away from people who try to belittle your ambitions. Small people 
 always do that, but the really great make you feel that you, too, can
 become great."
	- Mark Twain

Re: [libxml++] Glib::ConvertError in a simple document.

[Jonathan W. <co...@co...>]

On Wed, Mar 02, 2005 at 11:46:23AM -0500, PS wrote:

> Hello
> I compiled libxml++ and used the first example from manual (the dom parser)
> When I run in on windows everything worked ok, but on unix (I use 
> FreeBSD 4.11) it gave me errors:
> 
> ...
> ...
>     Node name = title
> Node name = title
>          line = 8
> 
>       Text Node
> terminate called after throwing an instance of 'Glib::ConvertError'
>       text = "Abort (core dumped)
> 
> 
> the sample xml file was:
> <?xml version="1.0" encoding="windows-1251"?>
> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
>         "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
> <html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
> <head>
> 	<title>???????????????????????? ????????????????????...</title>
> 
> So, as you might see, it coredumps just when it attempted to recode non 
> english chars inside title.
> 
> 
> What's wrong with this?? Thank you

It's possible that you don't have the right libraries installed to
support conversion from windows-1252 - FreeBSD often installs a minimal
set of libs. Try this:

    iconv -l | grep -i windows-1252

jon

-- 
This space left intentionally blank.

[libxml++] Glib::ConvertError in a simple document.

[PS <blo...@ma...>]

Hello
I compiled libxml++ and used the first example from manual (the dom parser)
When I run in on windows everything worked ok, but on unix (I use 
FreeBSD 4.11) it gave me errors:

...
...
     Node name = title
Node name = title
          line = 8

       Text Node
terminate called after throwing an instance of 'Glib::ConvertError'
       text = "Abort (core dumped)


the sample xml file was:
<?xml version="1.0" encoding="windows-1251"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
         "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
<head>
	<title>Производство хлопкового...</title>

So, as you might see, it coredumps just when it attempted to recode non 
english chars inside title.


What's wrong with this?? Thank you

[libxml++] libxml++ & Schema

[Frank B. <ro...@we...>]

Hi :-)

i looked in the API, is in the API and found  the xmlpp::Validator Class Reference

is it posibel to validate XML files with xsd (schema not DTD) ? 

I wrote a Programm based on the testscripts from libxml.. cut & past and tow lines code from me :-)


Greetings 

Frank


#include "Schema_impl.h"
#include <iostream>
#include <libxml/xmlversion.h>
#include <libxml/parser.h>
#include <libxml/xmlmemory.h>
#include <libxml/debugXML.h>
#include <libxml/xmlschemas.h>
#include <libxml/xmlschemastypes.h>


Schema_impl::Schema_impl():schema(NULL)
{
 
}

Schema_impl::~Schema_impl()
{

}

bool Schema_impl::xmlfile(const std::string myxmlfile)
{
  smyxmlfile += myxmlfile;
  const char *pmyxmlfile = myxmlfile.c_str();
  doc = xmlReadFile(pmyxmlfile,NULL,0);
  return (true);
}

bool Schema_impl::xsdfile(const std::string myxsdfile)
{
 const char *pmyxsdfile = myxsdfile.c_str();
 smyxsdfile += myxsdfile;
 xmlSchemaParserCtxtPtr ctxt = xmlSchemaNewParserCtxt(pmyxsdfile);
 schema = xmlSchemaParse(ctxt);
 xmlSchemaFreeParserCtxt(ctxt);
 
 if (schema == NULL)
 {
 xmlSchemaCleanupTypes();
 xmlCleanupParser();
 xmlMemoryDump();
 return (false);
 }
 
 return (true);
}

int Schema_impl::validate() 
{  
   xmlSchemaValidCtxtPtr ctxt = xmlSchemaNewValidCtxt(schema);
   xmlSchemaSetValidErrors(ctxt, (xmlSchemaValidityErrorFunc) fprintf,(xmlSchemaValidityWarningFunc) fprintf,stderr);

   int ret = xmlSchemaValidateDoc(ctxt, doc);

   const char *pmyxmlfile = smyxmlfile.c_str();

   if (ret == 0) {
    printf("%s validates\n", pmyxmlfile );
   } else if (ret > 0) {
    printf("%s fails to validate\n", pmyxmlfile );
   } else {
    printf("%s validation generated an internal error\n", pmyxmlfile );
   }

   xmlSchemaFreeValidCtxt(ctxt);
   xmlFreeDoc(doc);
   xmlSchemaFree(schema);

  return (0);
}
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[libxml++] Multiple documents with one DomParser

[John C. <li...@vm...>]

Hello,

In my project I am parsing a number of xml documents, each one validated 
against a different inline dtd.
I using only one parser and I am not freeing anything between calls to 
parse_memory().
My program crashes when exiting at the destructor of DomParser (see the 
backtrace),
which means I am doing something wrong.

--- The backtrace of the core dump is the following 
----------------------------------------------------
#0  0x40cb5af4 in mallopt () from /lib/tls/libc.so.6
#1  0x40cb4a4b in free () from /lib/tls/libc.so.6
#2  0x407e694c in xmlRegFreeRegexp () from /usr/lib/libxml2.so.2
#3  0x407a2c78 in xmlSnprintfElementContent () from /usr/lib/libxml2.so.2
#4  0x40797b40 in xmlHashFree () from /usr/lib/libxml2.so.2
#5  0x407a30c9 in xmlFreeElementTable () from /usr/lib/libxml2.so.2
#6  0x407903fe in xmlFreeDtd () from /usr/lib/libxml2.so.2
#7  0x407905d7 in xmlFreeDoc () from /usr/lib/libxml2.so.2
#8  0x40746c13 in xmlpp::Document::~Document () from 
/usr/lib/libxml++-2.6.so.1
#9  0x4074bdbb in xmlpp::DomParser::release_underlying () from 
/usr/lib/libxml++-2.6.so.1
#10 0x4074ae40 in xmlpp::DomParser::~DomParser () from 
/usr/lib/libxml++-2.6.so.1
#11 0x080dfc81 in ~EnvLoader (this=0xbfffe5f4) at ldrScene.h:24
#12 0x08082313 in ~EnvDynSimulation (this=0xbfffdff0) at 
EnvDynSimulation.cpp:24
#13 0x08103d00 in main (argc=6, argv=0xbffffb54) at eds.cpp:28
--------------------------------------------------------------------------------------------------------

Can I use one parser to parse all of them or do I need one parser per 
document?
If one parser is enough, do I need to free any resources between parses?

System is: debian sarge (2.6.8-1-k7), libxml++2.6 (2.6.1-2)

Thanx
John Chronakis




PS: Here is the code I use and a few words, if they help

I want dtds hardcoded, and I couldnt find a method to force DomParser to 
use dtd from a char buffer.
So, I am loading the (plain ascii) xml file into a char buffer, then 
adding the dtd inline (<doctype... [dtdcontent]>)
and calling the parser like this:

...
try
{
        //mp_parser: pointer to my DomParser
        //docstring: the document with the inline dtd
        mp_parser->set_validate();
        mp_parser->set_substitute_entities();

        // Parse the document
        mp_parser->parse_memory(docstring);
       
        if(*mp_parser)
        {
                const xmlpp::Node* pNode = 
mp_parser->get_document()->get_root_node();
                this->parse(pNode);
                // this has a method parse that does the real parsing
                // delete mp_parser->get_document() !!!Crashes!!!
       }
}
...

I call this sniplet a number of times, and I do not free anything 
between calls.
When I tried to delete the document, it crashed.
Everything works fine for the lifetime of my program, but when I finaly 
exit from it, I get a segfault.

[libxml++] question about Document::set_entity_declaration()

[Kike F. <sis...@si...>]

Hello,

Is there a way to create an entity declaration of this type with
Document::set_entity_declaration() function?

<!ENTITY TDoc01 SYSTEM "proba.xml" NDATA CorpusId>

set_entity_declaration() takes five arguments, one of which is the
publicId. In libxml I can pass a NULL pointer as publicId so the library
creates correctly the entity but in libxml++ I cannot pass a NULL
pointer (I get "Exception caught: attempt to create string with null
pointer") and passing an empty string always creates something like 

<!ENTITY TDoc01 PUBLIC "" "proba.xml" NDATA CorpusId> 

Am I doing something wrong or is this a bug? 

Thank you.

-- 
Kike Fernandez <sis...@si...>
IXA Taldea

[libxml++] access to CVS web

[Cyril P. <cyr...@la...>]

Hi

In the CVS web browser, it's impossible to see/download
insert_example_code.pl (and all others I tried)

http://cvs.gnome.org/registry/file.cgi?cvsroot=/cvs/gnome&file=insert_example_code.pl&dir=libxml++/docs/manual

returns

Not Found

The requested URL /registry/file.cgi was not found on this server.
Apache/2.0.46 (Red Hat) Server at cvs.gnome.org Port 80

[libxml++] libxml++-2.9.2 build error

[Juerg B. <ju...@pa...>]

Hi

Trying to build libxml++-2.9.2 fails with the following messages:

Making all in manual
make[2]: Entering directory `/usr/src/libxml++-2.9.2/docs/manual'
make[2]: *** No rule to make target `insert_example_code.pl', needed by
`libxml++.xml'.  Stop.
make[2]: Leaving directory `/usr/src/libxml++-2.9.2/docs/manual'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/usr/src/libxml++-2.9.2/docs'
make: *** [all-recursive] Error 1
*** Error: make
*** ERROR: libxml++-2.6-x86-glibc-2.3-gcc-3.4-2-2.9.2-1

It looks like insert_example_code.pl is missing in EXTRA_DIST...

Regards,

J=C3=BCrg

[libxml++] Re: [xml] ANNOUNCE: libxml++ 2.9.2

[Christophe de V. <cde...@al...>]

Chris Poppe a =E9crit :

>Hello,
>
>Will this c++ wrapper be compatible with wince?=20
> =20
>
It is not in our plans to work on it, but if anybody is willing to do=20
it, it would be nice (I don't think there is a lot to do, but I don't=20
have a winCE to work on).

Regards,

Christophe

Re: [libxml++] new release please

[Christophe de V. <cde...@al...>]

Hi again,

I'm still having problem with the packaging. A distcheck produce this 
result, even after a distclean :

doxygen Doxyfile
Searching for include files...
Searching for example files...
Searching for images...
Searching for dot files...
Searching for files to exclude
Reading input files...
Reading and parsing tag files
Error: Tag file `libstdc++.tag.xml' does not exist or is not a file. 
Skipping it...
Error: Tag file `../../../glibmm/docs/reference/glibmm_doxygen_tags' 
does not exist or is not a file. Skipping it...
No input read, no output generated!
make[3]: *** [2.9/html/index.html] Error 1
make[3]: Leaving directory 
`/home/cdevienne/prog/libxml++/libxml++-2.9.2/=build/docs/reference'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory 
`/home/cdevienne/prog/libxml++/libxml++-2.9.2/=build/docs'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory 
`/home/cdevienne/prog/libxml++/libxml++-2.9.2/=build'
make: *** [distcheck] Error 2

The strange thing is that from what I understood in the Changelog, the 
documentation is supposed to be put in the dist, not re-generated.
I did not (yet) dig into this, but if you have any idea...

Thanks

Christophe

Re: [libxml++] new release please

[Christophe de V. <cde...@al...>]

Hi

I have two little problem with the packaging :

- first, a README file in docs/manual is referenced by EXTRA_DIST, but 
is not in the cvs. Is it missing or do I take is off ?

- The second problem is dummy. Make dist is incomplete because some file 
paths are too long :
tar: 
libxml++-2.9.2/docs/reference/html/classxmlpp_1_1internals_1_1ScopedConstructCallbackDeactivator.html: 
file name is too long(max 99); not dumped
tar: 
libxml++-2.9.2/docs/reference/html/classxmlpp_1_1internals_1_1ScopedConstructCallbackDeactivator-members.html: 
file name is too long (max 99); not dumped
tar: Error exit delayed from previous errors
chmod -R a+w libxml++-2.9.2 >/dev/null 2>&1; rm -rf libxml++-2.9.2

The tarball is produced anyway, but will be missing a file. Since it's 
the documentation, it's not critical but still, this is annoying. If 
anybody have a solution...

Regards

Christophe

[libxml++] Strange linker error building a libxml++ app with MinGW

[Nick W. <Nic...@so...>]

Hello,

Having used libxml++ successfully in a Linux environment, I'm having a bit
of a job getting it to work in Windows (XP; MinGW; gcc 3.4.2).

I'm using 1.0.4, so the only dependency is straight libxml2. I compiled
libxml2 using the supplied MinGW makefile (which needed a little tweaking
as it had syntax errors!) and ended up with a static library libxml2.a,
which I installed in the appropriate directory.

However, lacking a full Cygwin environment (I do not want the application I
am writing to depend on Cygwin shared libraries) I built libxml++ in a
somewhat non-ustandard way. This involved basically moving round the
directories and creating a simple makefile where each libxml++ source file
was compiled using:

g++ -c -Ic:\mingw\include  file.cc

i.e. no preprocessor directives. I also #ifdef'ed out the stuff in
api_export.h, as I did not want a DLL of libxml++, just a static library,
and the stuff in api_export.h was causing the compilation to throw up all
manner of warnings and errors.

libxml++ successfully built that way, and I ended up with a libxml++.a
which I moved to the appropriate lib directory.

However when I attempted to compile a small sample libxml++ program:

#include <libxml++/libxml++.h>

int main()
{
      xmlpp::SaxParser p;
      return 0;
}

compilation was successful, but linking, with

g++ -o test.exe test.o -Lc:\mingw\lib -lxml++ -lxml2

I got all manner of obscure linker errors spewed out, e.g.:

undefined reference to _imp_ZN5xmlpp9SaxParser1Eb
undefined reference to _imp__xmlFree
undefined reference to _imp_ZN5xmlpp11ContentNodeC2EP8_xmlNode

and on and on for about 20 lines. The same thing happened when I attempted
to compile my FLTK-based GUI application with libxml++; it works fine with
the XML parsing code commented out (i.e. I can compile and build an FLTK
application under my environment) but spewed weird linker errors when I
attempted to link in libxml2/libxml++.

I think these sorts of linker errors, featuring internal compiler types,
are normally to do with mixing source compiled with one compiler version
and libraries compiled with another, aren't they? However in my case
everything was compiled with gcc/g++ 3.4.2 (supplied with the latest
MinGW).

One final observation is that the samples that come with straight libxml2
compiled (as part of the libxml2 make process) and ran fine.
I'm guessing I did not include a crucial preprocessor directive when
compiling libxml++.....

I should add that I have little experience of compiling stuff under
Windows, other than under Visual C++, which I don't have on my current
system (and besides, I want to attempt to use only free software within my
installation of Windows!)

Thanks,
Nick

Re: [libxml++] DLL problem

[Christophe de V. <cde...@al...>]

stz...@we... wrote:

>Hello..
>  
>

Hi !

>I would like to use libxml++ and I can create a *.lib file but when I try to make a DLL file under VC++ 2003 I recieve the following error messages:
>-----
>libxml++ error LNK2001: unresolved external symbol "public: __thiscall Glib::ustring::~ustring(void)" (??1ustring@Glib@@QAE@XZ)
>libxml++ error LNK2001: unresolved external symbol "public: __thiscall Glib::ustring::ustring(char const *)" (??0ustring@Glib@@QAE@PBD@Z)
>libxml++ error LNK2001: unresolved external symbol "public: __thiscall Glib::ustring::ustring(class Glib::ustring const &)" (??0ustring@Glib@@QAE@ABV01@@Z)
>libxml++ error LNK2001: unresolved external symbol "public: __thiscall Glib::ustring::ustring(void)" (??0ustring@Glib@@QAE@XZ)
>...
>-----
>
>It seams that the linker hasn't found the glib library. I have added the following *.lib files in my 'Microsoft Visual Studio .NET 2003\Vc7\lib' folder:
>-----
>glib-2.0.lib
>gmodule-2.0.lib
>gobject-2.0.lib
>gthread-2.0.lib
>-----
>
>What I'm doing wrong?
>
You're missing glibmm, which is the C++ wrapper of glib.

Regards,

Christophe

[libxml++] libxml++ documentation,

[Mariano <ma...@uv...>]

Hi,
I was looking for some documentation on using this library, such as a 
tutorial, a manual, or a book (online or printed). The examples and the 
reference are ok, but I would need a little more info.

Thanks!


cheers,

Mariano Guadagnini

[libxml++] DLL problem

[<stz...@we...>]

Hello..
I would like to use libxml++ and I can create a *.lib file but when I try to make a DLL file under VC++ 2003 I recieve the following error messages:
-----
libxml++ error LNK2001: unresolved external symbol "public: __thiscall Glib::ustring::~ustring(void)" (??1ustring@Glib@@QAE@XZ)
libxml++ error LNK2001: unresolved external symbol "public: __thiscall Glib::ustring::ustring(char const *)" (??0ustring@Glib@@QAE@PBD@Z)
libxml++ error LNK2001: unresolved external symbol "public: __thiscall Glib::ustring::ustring(class Glib::ustring const &)" (??0ustring@Glib@@QAE@ABV01@@Z)
libxml++ error LNK2001: unresolved external symbol "public: __thiscall Glib::ustring::ustring(void)" (??0ustring@Glib@@QAE@XZ)
...
-----

It seams that the linker hasn't found the glib library. I have added the following *.lib files in my 'Microsoft Visual Studio .NET 2003\Vc7\lib' folder:
-----
glib-2.0.lib
gmodule-2.0.lib
gobject-2.0.lib
gthread-2.0.lib
-----

What I'm doing wrong? Any suggestions what I can do to fix this linker errors? Has anybody already created a dll file and could send it to me?

PS: I'm a newbie and I'm sorry for my lack of knowledge..

Thanks in advance for your help..
ciao..
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Re: [libxml++] SIGABRT received during xmlpp::Document::write_to_string_formatted

[Cyril P. <cyr...@la...>]

Same problem with libxml++-2.9.1


Cyril PICARD wrote:
> libxml++-2.8.0
> 
> I've just seen that 2.9.1 is available. I will try it soon and I'll let 
> you known about it.
> 
> Christophe de Vienne wrote:
> 
>> Cyril PICARD wrote:
>>
>>> For for the link, it's quite simpler now... but still SIGABRT... 
>>> Still no idea on my side...
>>
>>
>>
>> Wich version of libxml++ are you using ?
>> Does the problem happen with the lastest version ?
>>
>> Regards,
>>
>> Christophe
>>
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[libxml++] Node dynamic_cast

[Chai, J. (N-VB Enterprises) <jin...@lm...>]

Hi,

I am new to the libxml++(1.0) and trying to walk through the examples. 

For the dom_xpath example, I tried to do a dynamic_cast for the nodes
contained in the NodeSet returned by the Node find method. But it always
fails. Is there anything I am doing wrong?

Thanks,
Jin

=======================
// -*- C++ -*-

/* main.cc
 *
 * Copyright (C) 2002 The libxml++ development team
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the Free
 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <libxml++/libxml++.h>

#include <iostream>


void xpath_test(const xmlpp::Node* node, const std::string& xpath)
{
  std::cout << std::endl; //Separate tests by an empty line.
  std::cout << "searching with xpath '" << xpath << "' in root node: "
<< std::endl;

  xmlpp::NodeSet set = node->find(xpath);
  
  std::cout << set.size() << " nodes have been found:" << std::endl;

  //Print the structural paths:
  for(xmlpp::NodeSet::iterator i = set.begin(); i != set.end(); ++i)
  {
    xmlpp::Element* eNode = dynamic_cast<xmlpp::Element*>
(*i);//<====================

    std::cout << " " << (*i)->get_path() << " " <<
(*i)->get_name()<<std::endl;
    if (eNode)
       std::cout << "Element name:" << eNode->get_name() << std::endl;//
<======This line never get printed.
  }
}

int main(int argc, char* argv[])
{
  std::string filepath;
  if(argc > 1 )
    filepath = argv[1]; //Allow the user to specify a different XML file
to parse.
  else
    filepath = "example.xml";

  try
  {
    xmlpp::DomParser parser(filepath);
    if(parser)
    {
      const xmlpp::Node* root = parser.get_document()->get_root_node();
//deleted by DomParser.

      if(root)
      {
        // Find all sections, no matter where:
        xpath_test(root, "//section");

        // Find the title node (if there is one):
        xpath_test(root, "title");

        std::cout << std::endl;

        // And finally test whether intra-document links are
well-formed.
        // To be well-formed, the 'linkend' attribute must refer to
        // an element in terms of its 'id'.
        //
        // Find out whether there are linkend attributes that don't have
        // corresponding 'id's
        std::cout << "searching for unresolved internal references "
                  << "(see docbook manual):" << std::endl;

        xpath_test(root, "//xref/@linkend");
      }
    }
  }
  catch(const std::exception& ex)
  {
    std::cout << "Exception caught: " << ex.what() << std::endl;
  }

  return 0;
}


========================
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE article PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN"
"http://www.oasis-open.org/docbook/xml/4.0/docbookx.dtd">
<article>
  <title>An Article</title>
  <section id="section1">
    <title>A section</title>
    <para>This is a paragraph.</para>
  </section>
  <section id="section2">
    <title>Another section</title>
    <section id="section3">
      <title>A sub-section</title>
      <para>This paragraph refers to <xref linkend="section1"/>,
        <xref linkend="section2"/>, and <xref
linkend="section4"/>.</para>
    </section>
  </section>
</article>