mariadb-columnstore-engine/writeengine/shared/we_convertor.h

/* Copyright (C) 2014 InfiniDB, Inc.

   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 Street, Fifth Floor, Boston,
   MA 02110-1301, USA. */

/*******************************************************************************
 * $Id: we_convertor.h 4726 2013-08-07 03:38:36Z bwilkinson $
 *
 *******************************************************************************/
/** @file */

#pragma once

#include <time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <string>

#include <iostream>
#include <fstream>

#include "we_obj.h"
#include "we_config.h"
#include "calpontsystemcatalog.h"
#define EXPORT

/** Namespace WriteEngine */
namespace WriteEngine
{
/** Class Convertor */
class Convertor
{
 public:
  /**
   * @brief Default Constructor
   */
  Convertor()
  {
  }

  /**
   * @brief Destructor
   */
  ~Convertor()
  {
  }

  /**
   * @brief Get date/time string based on current date and time
   */
  EXPORT static const std::string getTimeStr();

  /**
   * @brief Convert specified integer value to a string
   *
   * @param val Integer value to be converted to a string
   */
  EXPORT static const std::string int2Str(int val);

  /**
   * @brief Convert an oid to a full file name (with partition and segment
   *        being included in the filename).  This is used for all column and
   *        dictionary store db files.  If dealing with a version buffer file,
   *        a partition and segment number of 0 should be used.
   */
  EXPORT static int oid2FileName(FID fid, char* fullFileName, char dbDirName[][MAX_DB_DIR_NAME_SIZE],
                                 uint32_t partition, uint16_t segment);

  EXPORT static int fileName2Oid(const std::string& fullFileName, uint32_t& oid, uint32_t& partition,
                                 uint32_t& segment);
  /**
   * @brief Convert specified errno to associated error msg string
   *
   * @param errNum System errno to be converted.
   * @param errString Error msg string associated with the specified errno.
   */
  EXPORT static void mapErrnoToString(int errNum, std::string& errString);

  /**
   * @brief Convert specified ColDataType to internal storage type (ColType)
   *
   * @param dataType Interface data-type
   * @param internalType Internal data-type used for storing
   */
  // BUG931
  EXPORT static void convertColType(execplan::CalpontSystemCatalog::ColDataType dataType, int colWidth,
                                    ColType& internalType, bool isToken = false);
  /**
   * @brief Convert specified internal storage type (ColType) to
   *        ColDataType
   *
   * @param internalType Internal data-type used for storing
   * @param dataType Interface data-type
   */
  EXPORT static void convertWEColType(ColType internalType,
                                      execplan::CalpontSystemCatalog::ColDataType& dataType);

  /**
   * @brief Convert interface column type to a internal column type.
   * curStruct is interpreted as a ColStruct.
   */
  EXPORT static void convertColType(ColStruct* curStruct);

  /*
   * @brief Get the correct width for a row
   */
  EXPORT static int getCorrectRowWidth(execplan::CalpontSystemCatalog::ColDataType dataType, int width);

  /*
   * @brief Convert a Decimal string to it's equivalent integer value.
   *        errno can be checked upon return to see if input value was
   *        out of range (ERANGE).
   *
   * field      decimal string to be converted
   * fieldLengh length of "field" in bytes
   * scale      decimal scale to be applied to value
   */
  EXPORT static long long convertDecimalString(const char* field, int fieldLength, int scale);

 private:
  struct dmFilePathArgs_t;
  static int dmOid2FPath(uint32_t oid, uint32_t partition, uint32_t segment, dmFilePathArgs_t* pArgs);
  static int32_t dmFPath2Oid(const dmFilePathArgs_t& pArgs, uint32_t& oid, uint32_t& partition,
                             uint32_t& segment);
};

}  // namespace WriteEngine

#undef EXPORT