/*****************************************************************

 * outline.c

 *

 * Copyright 1999, Clark Cooper

 * All rights reserved.

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the license contained in the

 * COPYING file that comes with the expat distribution.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.

 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY

 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,

 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE

 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

 *

 * Read an XML document from standard input and print an element

 * outline on standard output.

 */

#include <stdio.h>

#include <expat.h>

#define BUFFSIZE        8192

char Buff[BUFFSIZE];

int Depth;

static void

start(void *data, const char *el, const char **attr)

{

  int i;

  for (i = 0; i < Depth; i++)

    printf("  ");

  printf("%s", el);

  for (i = 0; attr[i]; i += 2) {

    printf(" %s='%s'", attr[i], attr[i + 1]);

  }

  printf("\n");

  Depth++;

}

static void

end(void *data, const char *el)

{

  Depth--;

}

int

main(int argc, char *argv[])

{

  XML_Parser p = XML_ParserCreate(NULL);

  if (! p) {

    fprintf(stderr, "Couldn't allocate memory for parser\n");

    exit(-1);

  }

  XML_SetElementHandler(p, start, end);

  for (;;) {

    int done;

    int len;

    len = fread(Buff, 1, BUFFSIZE, stdin);

    if (ferror(stdin)) {

      fprintf(stderr, "Read error\n");

      exit(-1);

    }

    done = feof(stdin);

    if (XML_Parse(p, Buff, len, done) == XML_STATUS_ERROR) {

      fprintf(stderr, "Parse error at line %d:\n%s\n",

              XML_GetCurrentLineNumber(p),

              XML_ErrorString(XML_GetErrorCode(p)));

      exit(-1);

    }

    if (done)

      break;

  }

  return 0;

}