/*
   Copyright (c) 2003, 2013, 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, 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
*/

#ifndef ATTRIBUTE_DESCRIPTOR_HPP
#define ATTRIBUTE_DESCRIPTOR_HPP

#define JAM_FILE_ID 5


class AttributeDescriptor {
  friend class Dbdict;
  friend class Dbtc;
  friend class Dbacc;
  friend class Dbtup;
  friend class Dbtux;
  friend class Dblqh;
  friend class SimulatedBlock;

public:
  static void setType(Uint32 &, Uint32 type);
  static void setSize(Uint32 &, Uint32 size);
  static void setArrayType(Uint32 &, Uint32 arrayType);
  static void setArraySize(Uint32 &, Uint32 arraySize);
  static void setNullable(Uint32 &, Uint32 nullable);
  static void setDKey(Uint32 &, Uint32 dkey);
  static void setPrimaryKey(Uint32 &, Uint32 dkey);
  static void setDynamic(Uint32 &, Uint32 dynamicInd);
  static void setDiskBased(Uint32 &, Uint32 val);
  
  static Uint32 getType(const Uint32 &);
  static Uint32 getSize(const Uint32 &);
  static Uint32 getSizeInBytes(const Uint32 &);
  static Uint32 getSizeInWords(const Uint32 &);
  static Uint32 getArrayType(const Uint32 &);
  static Uint32 getArraySize(const Uint32 &);
  static Uint32 getNullable(const Uint32 &);
  static Uint32 getDKey(const Uint32 &);
  static Uint32 getPrimaryKey(const Uint32 &);
  static Uint32 getDynamic(const Uint32 &);
  static Uint32 getDiskBased(const Uint32 &);

  static void clearArrayType(Uint32 &);

  Uint32 m_data;
};

/**
 *
 * a = Array type            - 2  Bits -> Max 3  (Bit 0-1)
 * t = Attribute type        - 6  Bits -> Max 63  (Bit 2-7)
 * s = Attribute size        - 3  Bits -> Max 7  (Bit 8-10)
 *                                0 is for bit types, stored in bitmap
 *                                1-2 unused
 *                                3 for byte-sized (char...)
 *                                4 for 16-bit sized
 *                                etc.
 * d = Disk based            - 1  Bit 11
 * n = Nullable              - 1  Bit 12
 * k = Distribution Key Ind  - 1  Bit 13
 * p = Primary key attribute - 1  Bit 14
 * y = Dynamic attribute     - 1  Bit 15
 * z = Array size            - 16 Bits -> Max 65535 (Bit 16-31)
 *                                Element size is determined by attribute size
 *
 *           1111111111222222222233
 * 01234567890123456789012345678901
 * aattttttsssdnkpyzzzzzzzzzzzzzzzz
 * aattsss n d k pyzzzzzzzzzzzzzzzz  [ old format ]
 *               
 */

#define AD_ARRAY_TYPE_SHIFT (0)
#define AD_ARRAY_TYPE_MASK  (3)

#define AD_TYPE_SHIFT       (2)
#define AD_TYPE_MASK        (63)

#define AD_SIZE_SHIFT       (8)
#define AD_SIZE_MASK        (7)

#define AD_SIZE_IN_BYTES_SHIFT (3)
#define AD_SIZE_IN_WORDS_OFFSET (31)
#define AD_SIZE_IN_WORDS_SHIFT  (5)

#define AD_DISK_SHIFT        (11)
#define AD_NULLABLE_SHIFT    (12)
#define AD_DISTR_KEY_SHIFT   (13)
#define AD_PRIMARY_KEY       (14)
#define AD_DYNAMIC           (15)

#define AD_ARRAY_SIZE_SHIFT  (16)
#define AD_ARRAY_SIZE_MASK   (65535)

inline
void
AttributeDescriptor::setType(Uint32 & desc, Uint32 type){
  assert(type <= AD_TYPE_MASK);
  desc |= (type << AD_TYPE_SHIFT);
}

inline
void
AttributeDescriptor::setSize(Uint32 & desc, Uint32 size){
  assert(size <= AD_SIZE_MASK);
  desc |= (size << AD_SIZE_SHIFT);
}

inline
void
AttributeDescriptor::setArrayType(Uint32 & desc, Uint32 arrayType){
  assert(arrayType <= AD_ARRAY_TYPE_MASK);
  desc |= (arrayType << AD_ARRAY_TYPE_SHIFT);
}

inline
void
AttributeDescriptor::clearArrayType(Uint32 & desc)
{
  desc &= ~Uint32(AD_ARRAY_TYPE_MASK << AD_ARRAY_TYPE_SHIFT);
}

inline
void
AttributeDescriptor::setArraySize(Uint32 & desc, Uint32 arraySize){
  assert(arraySize <= AD_ARRAY_SIZE_MASK);
  desc |= (arraySize << AD_ARRAY_SIZE_SHIFT);
}

inline
void
AttributeDescriptor::setNullable(Uint32 & desc, Uint32 nullable){
  assert(nullable <= 1);
  desc |= (nullable << AD_NULLABLE_SHIFT);
}

inline
void
AttributeDescriptor::setDKey(Uint32 & desc, Uint32 dkey){
  assert(dkey <= 1);
  desc |= (dkey << AD_DISTR_KEY_SHIFT);
}

inline
void
AttributeDescriptor::setPrimaryKey(Uint32 & desc, Uint32 dkey){
  assert(dkey <= 1);
  desc |= (dkey << AD_PRIMARY_KEY);
}

inline
void
AttributeDescriptor::setDynamic(Uint32 & desc, Uint32 dynamic){
  assert(dynamic <= 1);
  desc |= (dynamic << AD_DYNAMIC);
}

inline
void
AttributeDescriptor::setDiskBased(Uint32 & desc, Uint32 val)
{
  assert(val <= 1);
  desc |= (val << AD_DISK_SHIFT);
}

/**
 * Getters
 */
inline
Uint32
AttributeDescriptor::getType(const Uint32 & desc){
  return (desc >> AD_TYPE_SHIFT) & AD_TYPE_MASK;
}

inline
Uint32
AttributeDescriptor::getSize(const Uint32 & desc){
  return (desc >> AD_SIZE_SHIFT) & AD_SIZE_MASK;
}

inline
Uint32
AttributeDescriptor::getSizeInBytes(const Uint32 & desc){
  return (getArraySize(desc) << getSize(desc))
                             >> AD_SIZE_IN_BYTES_SHIFT;
}

inline
Uint32
AttributeDescriptor::getSizeInWords(const Uint32 & desc){
  return ((getArraySize(desc) << getSize(desc)) 
          + AD_SIZE_IN_WORDS_OFFSET) 
                              >> AD_SIZE_IN_WORDS_SHIFT;
}

inline
Uint32
AttributeDescriptor::getArrayType(const Uint32 & desc){
  return (desc >> AD_ARRAY_TYPE_SHIFT) & AD_ARRAY_TYPE_MASK;
}

inline
Uint32
AttributeDescriptor::getArraySize(const Uint32 & desc){
  return (desc >> AD_ARRAY_SIZE_SHIFT) & AD_ARRAY_SIZE_MASK;
}

inline
Uint32
AttributeDescriptor::getNullable(const Uint32 & desc){
  return (desc >> AD_NULLABLE_SHIFT) & 1;
}

inline
Uint32
AttributeDescriptor::getDKey(const Uint32 & desc){
  return (desc >> AD_DISTR_KEY_SHIFT) & 1;
}

inline
Uint32
AttributeDescriptor::getPrimaryKey(const Uint32 & desc){
  return (desc >> AD_PRIMARY_KEY) & 1;
}

inline
Uint32
AttributeDescriptor::getDynamic(const Uint32 & desc){
  return (desc >> AD_DYNAMIC) & 1;
}

inline
Uint32
AttributeDescriptor::getDiskBased(const Uint32 & desc)
{
  return (desc >> AD_DISK_SHIFT) & 1;
}

class NdbOut&
operator<<(class NdbOut&, const AttributeDescriptor&);


#undef JAM_FILE_ID

#endif
