153 lines
4.3 KiB
C++
153 lines
4.3 KiB
C++
/*
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* Legal Notice
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*
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* This document and associated source code (the "Work") is a part of a
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* benchmark specification maintained by the TPC.
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*
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* The TPC reserves all right, title, and interest to the Work as provided
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* under U.S. and international laws, including without limitation all patent
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* and trademark rights therein.
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*
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* No Warranty
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*
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* 1.1 TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, THE INFORMATION
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* CONTAINED HEREIN IS PROVIDED "AS IS" AND WITH ALL FAULTS, AND THE
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* AUTHORS AND DEVELOPERS OF THE WORK HEREBY DISCLAIM ALL OTHER
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* WARRANTIES AND CONDITIONS, EITHER EXPRESS, IMPLIED OR STATUTORY,
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* INCLUDING, BUT NOT LIMITED TO, ANY (IF ANY) IMPLIED WARRANTIES,
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* DUTIES OR CONDITIONS OF MERCHANTABILITY, OF FITNESS FOR A PARTICULAR
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* PURPOSE, OF ACCURACY OR COMPLETENESS OF RESPONSES, OF RESULTS, OF
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* WORKMANLIKE EFFORT, OF LACK OF VIRUSES, AND OF LACK OF NEGLIGENCE.
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* ALSO, THERE IS NO WARRANTY OR CONDITION OF TITLE, QUIET ENJOYMENT,
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* QUIET POSSESSION, CORRESPONDENCE TO DESCRIPTION OR NON-INFRINGEMENT
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* WITH REGARD TO THE WORK.
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* 1.2 IN NO EVENT WILL ANY AUTHOR OR DEVELOPER OF THE WORK BE LIABLE TO
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* ANY OTHER PARTY FOR ANY DAMAGES, INCLUDING BUT NOT LIMITED TO THE
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* COST OF PROCURING SUBSTITUTE GOODS OR SERVICES, LOST PROFITS, LOSS
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* OF USE, LOSS OF DATA, OR ANY INCIDENTAL, CONSEQUENTIAL, DIRECT,
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* INDIRECT, OR SPECIAL DAMAGES WHETHER UNDER CONTRACT, TORT, WARRANTY,
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* OR OTHERWISE, ARISING IN ANY WAY OUT OF THIS OR ANY OTHER AGREEMENT
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* RELATING TO THE WORK, WHETHER OR NOT SUCH AUTHOR OR DEVELOPER HAD
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* ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.
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*
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* Contributors
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* - Sergey Vasilevskiy
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*/
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/*
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* This template represents a general table class.
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* The type specified is the type of the table row.
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*/
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#ifndef TABLE_TEMPLATE_H
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#define TABLE_TEMPLATE_H
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#include <cstring>
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#include "utilities/EGenStandardTypes.h"
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#include "utilities/Random.h"
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#include "utilities/RNGSeeds.h"
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namespace TPCE {
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template <typename T> class TableTemplate {
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protected:
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T m_row; // private row for generation
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TIdent m_iLastRowNumber; // sequential last row number
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bool m_bMoreRecords; // true if more records can be generated, otherwise
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// false
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CRandom m_rnd; // random generator - present in all tables
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public:
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/*
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* The Constructor - just initializes member variables.
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*
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* PARAMETERS:
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* not applicable.
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*
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* RETURNS:
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* not applicable.
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*/
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TableTemplate()
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: m_iLastRowNumber(0), m_bMoreRecords(false) // assume
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{
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ClearRecord(); // zero the row
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m_rnd.SetSeed(RNGSeedTableDefault);
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}
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/*
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* Virtual destructor. Provided so that a sponsor-specific
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* destructor can be called on destruction from the base-class pointer.
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*
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* PARAMETERS:
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* none.
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*
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* RETURNS:
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* not applicable.
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*/
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virtual ~TableTemplate(){};
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/*
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* Generate the next record (row).
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*
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* PARAMETERS:
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* none.
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*
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* RETURNS:
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* true - if more records are available in the table.
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* false - if no more records can be generated.
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*/
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virtual bool GenerateNextRecord() = 0; // abstract class
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/*
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* Return whether all records in this table have been generated.
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*
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* PARAMETERS:
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* none.
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*
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* RETURNS:
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* true - if more records are available in the table.
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* false - if no more records can be generated.
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*/
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bool MoreRecords() {
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return m_bMoreRecords;
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}
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/*
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* Return a reference to the data row.
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*
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* PARAMETERS:
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* none.
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*
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* RETURNS:
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* typed reference to internal row buffer.
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*/
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// T const * GetRow() { return &m_row; }
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const T &GetRow() {
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return m_row;
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}
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/*
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* Set the internal record buffer to zero.
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*
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* This routine allows bitwise comparison between two versions of a row,
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* because it clears the unused bytes in string values
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* (past the NULL terminators).
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*
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* Note: the record cannot contain any inter-record state information,
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* or this information will be lost.
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*
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* PARAMETERS:
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* none.
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*
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* RETURNS:
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* none.
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*/
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void ClearRecord() {
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memset(&m_row, 0, sizeof(m_row));
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}
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};
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} // namespace TPCE
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#endif // TABLE_TEMPLATE_H
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