[libxml++] SIGABRT received during xmlpp::Document::write_to_string_formatted

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

Hi

I'm writing an XML file with the xmlpp interface.
Everything is fine with xmlpp::Document::write_to_file_formatted();
But when I'm calling xmlpp::Document::write_to_string_formatted(), I=20
receive a SIGABRT signal.

Any idea around ?

Thanks

PS: please find hereafter my source code and the gdb 'info st' output

* source code (very simple - the ConvertInput function comes from=20
libxml2 code API samples).

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

#include <string>
#include <iostream>

/**
  * ConvertInput:
  * @in: string in a given encoding
  * @encoding: the encoding used
  *
  * Converts @in into UTF-8 for processing with libxml2 APIs
  *
  * Returns the converted UTF-8 string, or NULL in case of error.
  */
xmlChar *
ConvertInput(const char *in, const char *encoding)
{
     xmlChar *out;
     int ret;
     int size;
     int out_size;
     int temp;
     xmlCharEncodingHandlerPtr handler;

     if (in =3D=3D 0)
         return 0;

     handler =3D xmlFindCharEncodingHandler(encoding);

     if (!handler) {
         printf("ConvertInput: no encoding handler found for '%s'\n",
                encoding ? encoding : "");
         return 0;
     }

     size =3D (int) strlen(in) + 1;
     out_size =3D size * 2 - 1;
     out =3D (unsigned char *) xmlMalloc((size_t) out_size);

     if (out !=3D 0) {
         temp =3D size - 1;
         ret =3D handler->input(out, &out_size, (const xmlChar *) in, &te=
mp);
         if ((ret < 0) || (temp - size + 1)) {
             if (ret < 0) {
                 printf("ConvertInput: conversion wasn't successful.\n");
             } else {
                 printf
                     ("ConvertInput: conversion wasn't successful.=20
converted: %i octets.\n",
                      temp);
             }

             xmlFree(out);
             out =3D 0;
         } else {
             out =3D (unsigned char *) xmlRealloc(out, out_size + 1);
             out[out_size] =3D 0;  /*null terminating out */
         }
     } else {
         printf("ConvertInput: no mem\n");
     }

     return out;
}

int main(int argc, char **argv)
{
   xmlpp::Document doc;
   xmlpp::Element * elem =3D 0;
   std::string my_encoding =3D "ISO-8859-1";
   doc.set_internal_subset("GEDCOM", "", "gedcom60.dtd");
   doc.add_comment("Generated by libgedcomparser - part of GHOSTS project=
");
   elem =3D doc.create_root_node("GEDCOM");

   xmlChar * converted =3D ConvertInput("blah =E9", my_encoding.c_str());
   std::cerr << converted << std::endl;
   if (converted !=3D 0)
     {
       std::string converted_string((char *)converted);
       std::cerr << converted << std::endl;
       elem->set_child_text(converted_string);
     }

   doc.write_to_file_formatted("xmlencode.xml", my_encoding);
   std::cerr << "write_to_file_formatted OK" << std::endl;
   Glib::ustring result_xml;
   result_xml =3D doc.write_to_string_formatted(my_encoding);
   std::cerr << "write_to_string_formatted OK" << std::endl;
   std::cerr << result_xml << std::endl;
   return 0;
}


* gdb info st :

#0  0x403aa621 in kill () from /lib/libc.so.6
#1  0x4017826b in raise (sig=3D6) at signals.c:65
#2  0x403aba53 in abort () from /lib/libc.so.6
#3  0x402f7895 in __cxxabiv1::__terminate(void (*)()) () from=20
/usr/lib/libstdc++.so.3
#4  0x402f7880 in __cxxabiv1::__terminate(void (*)()) () from=20
/usr/lib/libstdc++.so.3
#5  0x402f79e0 in __cxa_rethrow () from /usr/lib/libstdc++.so.3
#6  0x402ede29 in std::__throw_length_error(char const*) () from=20
/usr/lib/libstdc++.so.3
#7  0x0804aef1 in std::string::_Rep::_S_create(unsigned,=20
std::allocator<char> const&) (__capacity=3D4294967295,
     __alloc=3D@0xbffff500) at /usr/include/g++-v3/bits/basic_string.tcc:=
371
#8  0x0804ab28 in char* std::string::_S_construct<char const*>(char=20
const*, char const*, std::allocator<char> const&,=20
std::forward_iterator_tag) (
     __beg=3D0x80516e0 "<?xml version=3D\"1.0\"=20
encoding=3D\"ISO-8859-1\"?>\n<!DOCTYPE GEDCOM SYSTEM=20
\"gedcom60.dtd\">\n<!--Generated by libgedcomparser - part of GHOSTS=20
project-->\n<GEDCOM>blah =E9</GEDCOM>\n", __end=3D0x80516df "",
     __a=3D@0xbffff500) at /usr/include/g++-v3/bits/basic_string.tcc:143
#9  0x40034674 in std::string::string(char const*, unsigned,=20
std::allocator<char> const&) (this=3D0xbffff560,
     __s=3D0x80516e0 "<?xml version=3D\"1.0\"=20
encoding=3D\"ISO-8859-1\"?>\n<!DOCTYPE GEDCOM SYSTEM=20
\"gedcom60.dtd\">\n<!--Generated by libgedcomparser - part of GHOSTS=20
project-->\n<GEDCOM>blah =E9</GEDCOM>\n", __n=3D4294967295,
     __a=3D@0xbffff500) at /usr/include/g++-v3/bits/basic_string.h:666
#10 0x401c40c4 in Glib::ustring::ustring(char const*, unsigned)=20
(this=3D0xbffff560,
     src=3D0x80516e0 "<?xml version=3D\"1.0\"=20
encoding=3D\"ISO-8859-1\"?>\n<!DOCTYPE GEDCOM SYSTEM=20
\"gedcom60.dtd\">\n<!--Generated by libgedcomparser - part of GHOSTS=20
project-->\n<GEDCOM>blah =E9</GEDCOM>\n", n=3D169)
     at /usr/include/g++-v3/bits/stl_alloc.h:571
#11 0x40025d27 in xmlpp::Document::do_write_to_string(Glib::ustring=20
const&, bool) (this=3D0xbffff6a0,
     encoding=3D@0xbffff5d0, format=3Dtrue) at document.cc:309