////////////////////////////////////////////////////////////////////////////////
/// DISCLAIMER
///
/// Copyright 2014-2016 ArangoDB GmbH, Cologne, Germany
/// Copyright 2004-2014 triAGENS GmbH, Cologne, Germany
///
/// Licensed under the Apache License, Version 2.0 (the "License");
/// you may not use this file except in compliance with the License.
/// You may obtain a copy of the License at
///
///     http://www.apache.org/licenses/LICENSE-2.0
///
/// Unless required by applicable law or agreed to in writing, software
/// distributed under the License is distributed on an "AS IS" BASIS,
/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
/// See the License for the specific language governing permissions and
/// limitations under the License.
///
/// Copyright holder is ArangoDB GmbH, Cologne, Germany
///
/// @author Dr. Frank Celler
////////////////////////////////////////////////////////////////////////////////

#include "Basics/Common.h"



////////////////////////////////////////////////////////////////////////////////
/// @brief destroys the data of blob, but does not free the pointer
////////////////////////////////////////////////////////////////////////////////

void TRI_DestroyBlob(TRI_memory_zone_t* zone, TRI_blob_t* blob) {
  if (blob != nullptr) {
    if (blob->data != nullptr) {
      TRI_Free(zone, blob->data);
    }
  }
}


////////////////////////////////////////////////////////////////////////////////
/// @brief copies a blob into given destination
////////////////////////////////////////////////////////////////////////////////

int TRI_CopyToBlob(TRI_memory_zone_t* zone, TRI_blob_t* dst,
                   TRI_blob_t const* src) {
  dst->length = src->length;

  if (src->length == 0 || src->data == nullptr) {
    dst->length = 0;
    dst->data = nullptr;
  } else {
    dst->data = static_cast<char*>(TRI_Allocate(zone, dst->length, false));

    if (dst->data == nullptr) {
      return TRI_ERROR_OUT_OF_MEMORY;
    }

    memcpy(dst->data, src->data, src->length);
  }

  return TRI_ERROR_NO_ERROR;
}

////////////////////////////////////////////////////////////////////////////////
/// @brief assigns a blob value by reference into given destination
////////////////////////////////////////////////////////////////////////////////

int TRI_AssignToBlob(TRI_memory_zone_t* zone, TRI_blob_t* dst,
                     TRI_blob_t const* src) {
  dst->length = src->length;

  if (src->length == 0 || src->data == nullptr) {
    dst->length = 0;
    dst->data = nullptr;
  } else {
    dst->length = src->length;
    dst->data = src->data;
  }

  return TRI_ERROR_NO_ERROR;
}