/*
 * call-seq:
 *  native_write(chunk, last_chunk)
 *
 * Write +chunk+ to PushParser. +last_chunk+ triggers the end_document handle
 */
static VALUE native_write(VALUE self, VALUE _chunk, VALUE _last_chunk)
{
  xmlParserCtxtPtr ctx;
  Data_Get_Struct(self, xmlParserCtxt, ctx);

  const char * chunk  = NULL;
  int last_chunk      = 0;
  int size            = 0;

  if(Qnil != _chunk) {
    chunk = StringValuePtr(_chunk);
    size = RSTRING_LEN(_chunk);
  }
  if(Qtrue == _last_chunk) last_chunk = 1;

  if(xmlParseChunk(ctx, chunk, size, last_chunk))
    rb_raise(rb_eRuntimeError, "Couldn't parse chunk");

  return self;
}