/* Copyright (c) 2014, 2021, Oracle and/or its affiliates.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License, version 2.0,
   as published by the Free Software Foundation.

   This program is also distributed with certain software (including
   but not limited to OpenSSL) that is licensed under separate terms,
   as designated in a particular file or component or in included license
   documentation.  The authors of MySQL hereby grant you an additional
   permission to link the program and your derivative works with the
   separately licensed software that they have included with MySQL.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License, version 2.0, for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA */

#include "sql/sdi_utils.h"

#include <string.h>

#include "my_compiler.h"
#include "my_sys.h"
#include "mysqld_error.h"

/* purecov: begin deadcode */
bool create_serialized_meta_data(const char *schema_name [[maybe_unused]],
                                 const char *table_name [[maybe_unused]],
                                 uchar **meta_data [[maybe_unused]],
                                 size_t *meta_data_length [[maybe_unused]]) {
  /*
    TODO: This function is currently not implemented. The procedure here
    will be along the following lines:

     1. Assert that we have a shared MDL for the given schema, table,
        tablespace and tablespace files (if relevant). These will all be
        serialized into the same SDI blob.
     2. Retrieve the dd::Schema object.
     3. Retrieve the dd::Table object.
    [4. Optional: Retrieve the dd::Tablespace object.]
    [5. Optional: Retrieve the dd::Tablespace_files objects.]
     6. Create a top level SDI object.
     7. Fill inn top level object details, e.g. dictionary version etc.
     8. Fore each relevant object retrieved, serialize the object,
        including preparation of references to loosely coupled objects,
        e.g. collations.
     9. For each serialized object, add it to the top level object as an
        array element.
    10. Generate a string representation of the serialized meta data.
    11. Assign output parameters and return.
  */
  *meta_data_length = 0;
  *meta_data = nullptr;
  return false;
}

bool import_serialized_meta_data(const uchar *meta_data [[maybe_unused]],
                                 size_t meta_data_length [[maybe_unused]],
                                 bool readonly [[maybe_unused]]) {
  // TODO: This function is currently not implemented. Return error so
  // that client code will not attempt to open a non-existent table
  my_error(ER_FEATURE_DISABLED, MYF(0), "Serialized metadata import",
           "WL#7069");
  return true;
}

bool different_serialized_meta_data(const uchar *a_meta_data,
                                    size_t a_meta_data_length,
                                    const uchar *b_meta_data,
                                    size_t b_meta_data_length) {
  if ((a_meta_data_length != b_meta_data_length) ||
      (memcmp(a_meta_data, b_meta_data, a_meta_data_length)))
    return true;
  return false;
}
/* purecov: end */
