static VALUE read_memory(int argc, VALUE *argv, VALUE klass)
{
  VALUE content;
  VALUE parse_options;
  int parse_options_int;
  xmlSchemaParserCtxtPtr ctx;
  xmlSchemaPtr schema;
  VALUE errors;
  VALUE rb_schema;
  int scanned_args = 0;

  scanned_args = rb_scan_args(argc, argv, "11", &content, &parse_options);
  if (scanned_args == 1) {
    parse_options = rb_const_get(rb_const_get(mNokogiriXml, rb_intern("ParseOptions")), rb_intern("DEFAULT_SCHEMA"));
  }
  parse_options_int = (int)NUM2INT(rb_funcall(parse_options, rb_intern("to_i"), 0));

  ctx = xmlSchemaNewMemParserCtxt((const char *)StringValuePtr(content), (int)RSTRING_LEN(content));

  errors = rb_ary_new();
  xmlSetStructuredErrorFunc((void *)errors, Nokogiri_error_array_pusher);

#ifdef HAVE_XMLSCHEMASETPARSERSTRUCTUREDERRORS
  xmlSchemaSetParserStructuredErrors(
    ctx,
    Nokogiri_error_array_pusher,
    (void *)errors
    );
#endif

   schema = xmlSchemaParse(ctx);

  xmlSetStructuredErrorFunc(NULL, NULL);
  xmlSchemaFreeParserCtxt(ctx);

  if(NULL == schema) {
    xmlErrorPtr error = xmlGetLastError();
    if(error)
      Nokogiri_error_raise(NULL, error);
    else
      rb_raise(rb_eRuntimeError, "Could not parse document");

    return Qnil;
  }

  rb_schema = Data_Wrap_Struct(klass, 0, dealloc, schema);
  rb_iv_set(rb_schema, "@errors", errors);
  rb_iv_set(rb_schema, "@parse_options", parse_options);

  return rb_schema;
}
static VALUE read_memory(int argc, VALUE *argv, VALUE klass)
{
  VALUE content;
  VALUE parse_options;
  int parse_options_int;
  xmlSchemaParserCtxtPtr ctx;
  xmlSchemaPtr schema;
  VALUE errors;
  VALUE rb_schema;
  int scanned_args = 0;

  scanned_args = rb_scan_args(argc, argv, "11", &content, &parse_options);
  if (scanned_args == 1) {
    parse_options = rb_const_get(rb_const_get(mNokogiriXml, rb_intern("ParseOptions")), rb_intern("DEFAULT_SCHEMA"));
  }
  parse_options_int = (int)NUM2INT(rb_funcall(parse_options, rb_intern("to_i"), 0));

  ctx = xmlSchemaNewMemParserCtxt((const char *)StringValuePtr(content), (int)RSTRING_LEN(content));

  errors = rb_ary_new();
  xmlSetStructuredErrorFunc((void *)errors, Nokogiri_error_array_pusher);

#ifdef HAVE_XMLSCHEMASETPARSERSTRUCTUREDERRORS
  xmlSchemaSetParserStructuredErrors(
    ctx,
    Nokogiri_error_array_pusher,
    (void *)errors
    );
#endif

   schema = xmlSchemaParse(ctx);

  xmlSetStructuredErrorFunc(NULL, NULL);
  xmlSchemaFreeParserCtxt(ctx);

  if(NULL == schema) {
    xmlErrorPtr error = xmlGetLastError();
    if(error)
      Nokogiri_error_raise(NULL, error);
    else
      rb_raise(rb_eRuntimeError, "Could not parse document");

    return Qnil;
  }

  rb_schema = Data_Wrap_Struct(klass, 0, dealloc, schema);
  rb_iv_set(rb_schema, "@errors", errors);
  rb_iv_set(rb_schema, "@parse_options", parse_options);

  return rb_schema;
}