I meant the c source code for json-parser(), which is modules/json/json-parser.c, more specifically the json_parser_process() function:

```
static gboolean
json_parser_process(LogParser *s, LogMessage **pmsg, const LogPathOptions *path_options, const gchar *input, gsize input_len)
{
  JSONParser *self = (JSONParser *) s;
  struct json_object *jso;
  struct json_tokener *tok;

  if (self->marker)
    {
      if (strncmp(input, self->marker, self->marker_len) != 0)
        return FALSE;
      input += self->marker_len;

      while (isspace(*input))
        input++;
    }

  tok = json_tokener_new();
  jso = json_tokener_parse_ex(tok, input, input_len);
  if (tok->err != json_tokener_success || !jso)
    {
      msg_error("Unparsable JSON stream encountered",
                evt_tag_str ("input", input),
                tok->err != json_tokener_success ? evt_tag_str ("error", json_tokener_error_desc(tok->err)) : NULL,
                NULL);
      json_tokener_free (tok);
      return FALSE;
    }
  json_tokener_free(tok);

  log_msg_make_writable(pmsg, path_options);
  if (!json_parser_extract(self, jso, *pmsg))
    {
      msg_error("Error extracting JSON members into LogMessage as the top-level JSON object is not an object",
                evt_tag_str ("input", input),
                NULL);
      json_object_put(jso);
      return FALSE;
    }
  json_object_put(jso);

  return TRUE;
}

```