jones-ndb/impl/include/ndb/Record.h

/*
 Copyright (c) 2012, 2016, 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 NODEJS_ADAPTER_INCLUDE_RECORD_H
#define NODEJS_ADAPTER_INCLUDE_RECORD_H

// NOTE WHAT IS FRAGILE ABOUT THIS FILE:
// NdbApi uses Uint32 as a uint32_t, but v8 uses Uint32 as a class.
// Record.h must generally be included *before* node.h

#include "NdbApi.hpp"

class Record {
private:
  NdbDictionary::Dictionary *dict;
  Uint32 ncolumns,
         n_nullable, 
         nblobs,
         index,
         rec_size,
         start_of_nullmap, 
         size_of_nullmap;
  NdbRecord * ndb_record;
  NdbDictionary::RecordSpecification * const specs;
  union {
    unsigned char array[4];
    Uint32 value;
  } pkColumnMask, allColumnMask;
  bool isPartitionKey;

  void build_null_bitmap();
  void pad_offset_for_alignment();

public:
  Record(NdbDictionary::Dictionary *, int);
  ~Record();
  void addColumn(const NdbDictionary::Column *);
  bool completeTableRecord(const NdbDictionary::Table *);
  bool completeIndexRecord(const NdbDictionary::Index *); 
  
  const NdbRecord * getNdbRecord() const;
  Uint32 getNoOfColumns() const;
  Uint32 getNoOfBlobColumns() const;
  Uint32 getPkColumnMask() const;
  Uint32 getAllColumnMask() const;
  Uint32 getColumnOffset(int idx) const;
  const NdbDictionary::Column * getColumn(int idx) const;
  Uint32 getBufferSize() const;
  Uint32 getValueLength(int idx, const char *data) const;
  Uint32 getValueOffset(int idx) const;

  void setNull(int idx, char *data) const;
  void setNotNull(int idx, char *data) const;
  Uint32 isNull(int idx, char * data) const;
  bool partitionKey() const;
};


inline const NdbRecord * Record::getNdbRecord() const {
  return ndb_record;
}

inline Uint32 Record::getNoOfColumns() const {
  return ncolumns;
}

inline Uint32 Record::getNoOfBlobColumns() const {
  return nblobs;
}

inline Uint32 Record::getColumnOffset(int idx) const {
  return specs[idx].offset;
}

inline const NdbDictionary::Column * Record::getColumn(int idx) const {
  return specs[idx].column;
}

inline Uint32 Record::getBufferSize() const {
  return rec_size;
}

inline void Record::setNull(int idx, char * data) const {
  if(specs[idx].column->getNullable()) {
    *(data + specs[idx].nullbit_byte_offset) |= 
      (char) (1 << specs[idx].nullbit_bit_in_byte);
  }
}

inline void Record::setNotNull(int idx, char * data) const {
  if(specs[idx].column->getNullable()) {
    *(data +specs[idx].nullbit_byte_offset) &=
      (char) (0xFF ^ (1 << specs[idx].nullbit_bit_in_byte));
  }
}

inline Uint32 Record::isNull(int idx, char * data) const {
  if(specs[idx].column->getNullable()) {
    return (*(data + specs[idx].nullbit_byte_offset) &
             (1 << specs[idx].nullbit_bit_in_byte));
  }
  else return 0;
}

inline bool Record::partitionKey() const {
  return isPartitionKey;
}

inline Uint32 Record::getPkColumnMask() const {
  return pkColumnMask.value;
}

inline Uint32 Record::getAllColumnMask() const {
  return allColumnMask.value;
}


#endif