/* Copyright (c) 1998, 1999 Thai Open Source Software Center Ltd

   See the file COPYING for copying permission.

*/

/* This is simple demonstration of how to use expat. This program

   reads an XML document from standard input and writes a line with

   the name of each element to standard output indenting child

   elements by one tab stop more than their parent element.

*/

#include <stdio.h>

#include "expat.h"

static void

startElement(void *userData, const char *name, const char **atts)

{

  int i;

  int *depthPtr = userData;

  for (i = 0; i < *depthPtr; i++)

    putchar('\t');

  puts(name);

  *depthPtr += 1;

}

static void

endElement(void *userData, const char *name)

{

  int *depthPtr = userData;

  *depthPtr -= 1;

}

int

main(int argc, char *argv[])

{

  char buf[BUFSIZ];

  XML_Parser parser = XML_ParserCreate(NULL);

  int done;

  int depth = 0;

  XML_SetUserData(parser, &depth);

  XML_SetElementHandler(parser, startElement, endElement);

  do {

    size_t len = fread(buf, 1, sizeof(buf), stdin);

    done = len < sizeof(buf);

    if (XML_Parse(parser, buf, len, done) == XML_STATUS_ERROR) {

      fprintf(stderr,

              "%s at line %d\n",

              XML_ErrorString(XML_GetErrorCode(parser)),

              XML_GetCurrentLineNumber(parser));

      return 1;

    }

  } while (!done);

  XML_ParserFree(parser);

  return 0;

}