[Expat-discuss] (no subject)

[Ponnusamy.Anand at choicepoint.com]

This is the application code (API) we use to parse the XML document.

#include <stdio.h>
#include <ctype.h>
#include "../xmlparse/xmlparse.h"
#include "/export/home/expat/work/include/XMLParseAPI.h"
/*----------------------------------------------------------------------------*/
#define SUCCESS 0
#define FAILURE -1
#define TRUE  1
#define FALSE 0
/*----------------------------------------------------------------------------*/
static char *elementname       = "";
static int  errorlinenumber    =  0;
static char errorlinetext[256] = "";
/*----------------------------------------------------------------------------*/
int (*elementvaluehandler)(char *elementname, char *s, int len) = NULL;
/*----------------------------------------------------------------------------*/
char *
XMLGetError(int *linenumber)
{
   *linenumber = errorlinenumber;
   return errorlinetext;
}
/*----------------------------------------------------------------------------*/
void
XMLSetElementValueHandler(int (*f)(char *, char *, int))
{
   elementvaluehandler = f;
}
/*----------------------------------------------------------------------------*/
static int
trim_length_text(char *text, int *len)
{
   register int ii;

   for (ii = 0; ii < *len; ii++)
      if (text[ii] != ' ' && text[ii] != '\t' && text[ii] != '\n')
         return *len;

   *len = 0;

   return *len;
}
/*----------------------------------------------------------------------------*/
void
XMLStartElementHandler(void *data, const char *el, const char **attr)
{
   if (* el) elementname = (char *) el;
}
/*----------------------------------------------------------------------------*/
void
XMLEndElementHandler(void *data, const char *el)
{
   /* leaving what ? */
   printf("%s\n", el);
}
/*----------------------------------------------------------------------------*/
void
XMLCharacterHandler(void *data, const char *s, int len)
{
   trim_length_text((char *) s, &len);

   if (len)
   {
      elementvaluehandler(elementname, (char *) s, len);
/*----------------------------------------------------------------------------*/
int
XMLElementParse(char *xml,   void (*xmlstartelementhandler)(void *, const
char *, const char **),
                             int  (*xmlelementvaluehandler)(char *, char *,
int),
                             void (*xmlendelementhandler)  (void *, const
char *))
   int rc = SUCCESS;
   const char *encoding = "ISO-8859-1";
   XML_Parser p;
   errorlinenumber = 0;
   memset(errorlinetext, '\0', sizeof(errorlinetext));
   p = XML_ParserCreate(encoding);
   if (!p)
   {
      return FAILURE;
   }
   XML_UseParserAsHandlerArg(p);
   XML_SetCharacterDataHandler(p, XMLCharacterHandler);
   XML_SetElementHandler(p, xmlstartelementhandler, xmlendelementhandler);
  XMLSetElementValueHandler(xmlelementvaluehandler);
   if (!XML_Parse(p, xml, strlen(xml), TRUE))
   {
      errorlinenumber = XML_GetCurrentLineNumber(p);
      strncpy(errorlinetext, XML_ErrorString(XML_GetErrorCode(p)), 255);
      rc = FAILURE;
   }
   XML_ParserFree(p);
   return rc;
}


Regards,
P. Anand
(770)619-8319 (Office)
(678)576-8604 (Mobile)



                                                                                                                                       
                      "Fred L. Drake,                                                                                                  
                      Jr."                     To:      Ponnusamy.Anand at choicepoint.com                                                
                      <fdrake at acm.org>         cc:      expat-discuss at libexpat.org                                                     
                                               Subject: Re: [Expat-discuss] (no subject)                                               
                      10/28/2003 04:17                                                                                                 
                      PM                                                                                                               
                                                                                                                                       
                                                                                                                                       





Ponnusamy.Anand at choicepoint.com writes:
 > Can someone please explain how I need to get around this special
character
 > problem?

I suspect you're only looking at the result of a single call to your
character data handler, but can't be sure without seeing your code.

The character data handler should accumulate data at each successive
call; the data will be available when the end-element handler is
called.

I'll be expanding the documentation related to this, as this is a
common stumbling block.  For now, it is mentioned in the documentation
for XML_SetCharacterDataHandler().


  -Fred

--
Fred L. Drake, Jr.  <fdrake at acm.org>
PythonLabs at Zope Corporation