Re : [scew-users] scew_element_by_name error..

[mach]

Thank you Aleix,

The reason I used assertion was just for check the return value of element 
if found.
As you wrote, it's OK to use if statement.

The original examples/scew_print/scew_print.c without any modification prints 
well
input xml files as following.

...
         <trt:Profiles token="1080P_h264">
              ...
              ...
              ...
         </trt:Profiles>
...

So, there is trt:Profiles in input xml file.
And I just added some code among the scew_print.c like this...


  tree = scew_parser_load (parser, reader);
  if (tree == NULL)
    {   
      scew_error code = scew_error_code (); 
      scew_printf (_XT("Unable to parse file (error #%d: %s)\n"),
                   code, scew_error_string (code));
      if (code == scew_error_expat)
        {   
          enum XML_Error expat_code = scew_error_expat_code (parser);
          scew_printf (_XT("Expat error #%d (line %d, column %d): %s\n"),
                       expat_code,
                       scew_error_expat_line (parser),
                       scew_error_expat_column (parser),
                       scew_error_expat_string (expat_code));
        }   
      /* Frees the SCEW parser and reader. */
      scew_reader_free (reader);
      scew_parser_free (parser);
      return EXIT_FAILURE;
    }   
#if 0
  {
          scew_element *element = NULL; 
          scew_element *root = NULL; 
          root = scew_tree_root (tree);
          assert(root != NULL);
          element = scew_element_by_name(root, _XT("trt:Profiles"));
          assert(element != NULL);
  }
#endif
  /* Prints full tree. */
//  scew_printf (_XT("\n*** Manual print:\n\n"));
  print_element (scew_tree_root (tree), 0); 
  /* Prints full tree using SCEW writer. */
  scew_printf (_XT("\n\n*** SCEW writer (stdout) print:\n\n"));
  writer = scew_writer_fp_create (stdout);
  printer = scew_printer_create (writer);
  scew_printer_print_tree (printer, tree);
  scew_printf (_XT("\n"));


Should I have to use some initialization functions...??

Thanks,
Best regards,

Mach




 


----- 메시지 원본 ----
보낸 사람: Aleix Conchillo Flaqué <address@hidden>
받는 사람: mach <address@hidden>
보낸 시간: 2010년 7월 15일 (목), 3:59:53 PM
제목: Re: [scew-users] scew_element_by_name error..

On Thu, Jul 15, 2010 at 04:07, mach <address@hidden> wrote:
> Hello Dear;
>
> I am testing the api of scew-1.1.2 as below using
> example/scew_print/scew_print.c.
> The example works fine without appended part.
> But scew_print abort with a message like below혻when compiled with appeded 
part.
>
> lt-scew_print: scew_print.c:189: main: Assertion `element != ((void *)0)'
> failed.
> Aborted
>
> Could you let me know what is wrong or missed.
>

scew_element_by_name returns an element if it finds it, otherwise it
returns NULL. So, you should not use an assertion, use an "if"
instead.

> lt-scew_print: scew_print.c:189: main: Assertion `element != ((void *)0)'

Again, this means your element "trt:Profiles" was not found.


Aleix