graphml_stub.c

Agraph_t* graphml_parse(FILE * fp) {
  // 1. use libxml2 to (try) to parse contents
  // of fp into a DOM.
  return (Agraph_t*)NULL;
  
  // 2. if DOM parsing was successful, convert DOM into an Agraph_t*.

}

Agraph_t *agread(FILE * fp)
{
  /* check if this is a graphml (XML) file by trying to 
     parse it with an XML DOM parser. */
  Agraph_t* retval;
  if ((retval = graphml_parse(fp)) != (Agraph_t*)NULL) {
    return retval;
  }
  else {
    aglexinit(fp, (fgets));	/* use system fgets */
    agparse();
    return AG.parsed_g;
  }
}