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 */

#ifndef _WE_CONVERTOR_H_
#define _WE_CONVERTOR_H_

#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"
#if defined(_MSC_VER) && defined(WRITEENGINE_DLLEXPORT)
#define EXPORT __declspec(dllexport)
#else
#define EXPORT
#endif

/** 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);

    /**
     * @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,
                                      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);

};

} //end of namespace

#undef EXPORT

#endif // _WE_CONVERTOR_H_