hash_to_buffer_serializer.cc

/* Copyright (c) 2016, 2017, Oracle and/or its affiliates. All rights reserved.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; version 2 of the License.

   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 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 "hash_to_buffer_serializer.h"

namespace keyring
{
  my_bool Hash_to_buffer_serializer::store_key_in_buffer(const IKey* key,
                                                         Buffer *buffer)
  {
    if (buffer->size < buffer->position + key->get_key_pod_size())
      return TRUE;
    key->store_in_buffer(buffer->data, &(buffer->position));
    return FALSE;
  }

  my_bool Hash_to_buffer_serializer::store_keys_in_buffer(HASH *keys_hash,
                                                          Buffer *buffer)
  {
    for (uint i= 0 ; i < keys_hash->records ; ++i)
    {
      if(store_key_in_buffer(reinterpret_cast<const IKey *>(my_hash_element(keys_hash, i)),
                             buffer))
        return TRUE;
    }
    return FALSE;
  }

  ISerialized_object* Hash_to_buffer_serializer::serialize(HASH *keys_hash,
                                                           IKey *key,
                                                           const Key_operation operation)
  {
    size_t memory_needed_for_buffer_after_operation= memory_needed_for_buffer;

    switch(operation)
    {
      case STORE_KEY: memory_needed_for_buffer_after_operation += key->get_key_pod_size();
                      break;
      case REMOVE_KEY: memory_needed_for_buffer_after_operation -= key->get_key_pod_size();
                       break;
      case NONE:
      case ROTATE:
        break;
    }

    Buffer *buffer= new Buffer(memory_needed_for_buffer_after_operation);
    buffer->set_key_operation(operation);
    if (store_keys_in_buffer(keys_hash, buffer))
    {
      delete buffer;
      return NULL;
    }
    return buffer;
  }
} //namespace keyring