mirror of
https://github.com/mariadb-corporation/mariadb-columnstore-engine.git
synced 2025-04-20 09:07:44 +03:00
100 lines
2.5 KiB
C++
100 lines
2.5 KiB
C++
/* 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_colbufsec.cpp 4450 2013-01-21 14:13:24Z rdempsey $
|
|
*
|
|
****************************************************************************/
|
|
|
|
/** @file
|
|
* Implementation of the ColumnBufferSection class
|
|
*/
|
|
|
|
#include "we_colbufsec.h"
|
|
|
|
namespace WriteEngine
|
|
{
|
|
|
|
ColumnBufferSection::ColumnBufferSection(
|
|
ColumnBuffer* const cb,
|
|
RID sRowId,
|
|
RID eRowId,
|
|
int width,
|
|
int sOffset)
|
|
: fCBuf(cb),
|
|
fStartRowId(sRowId),
|
|
fEndRowId(eRowId),
|
|
fColWidth(width),
|
|
fBufStartOffset(sOffset),
|
|
fCurrRowId(sRowId),
|
|
fStatus(INIT_COMPLETE)
|
|
{
|
|
}
|
|
|
|
ColumnBufferSection::~ColumnBufferSection()
|
|
{
|
|
}
|
|
|
|
void ColumnBufferSection::write(const void* const data, int nRows)
|
|
{
|
|
//Casting void * to unsigned char * without modifying the constness
|
|
const unsigned char* const tData =
|
|
static_cast<const unsigned char* const>(data);
|
|
|
|
if (fCurrRowId + nRows + 1 > fEndRowId)
|
|
{
|
|
//TODO: Handle error (old-dmc)
|
|
}
|
|
|
|
int startOffset = (fBufStartOffset + (fCurrRowId - fStartRowId) *
|
|
fColWidth) % fCBuf->getSize();
|
|
int nBytes = nRows * fColWidth;
|
|
int bytesWritten = 0;
|
|
|
|
if ((startOffset + nBytes) > fCBuf->getSize())
|
|
{
|
|
fCBuf->write(tData, startOffset, fCBuf->getSize() - startOffset);
|
|
bytesWritten = fCBuf->getSize() - startOffset;
|
|
startOffset = 0;
|
|
}
|
|
|
|
fCBuf->write(tData + bytesWritten, startOffset, nBytes - bytesWritten);
|
|
fCurrRowId += nRows;
|
|
}
|
|
|
|
void ColumnBufferSection::setStatus(int s)
|
|
{
|
|
fStatus = s;
|
|
}
|
|
|
|
int ColumnBufferSection::getStatus() const
|
|
{
|
|
return fStatus;
|
|
}
|
|
|
|
int ColumnBufferSection::getStartOffset() const
|
|
{
|
|
return fBufStartOffset;
|
|
}
|
|
|
|
int ColumnBufferSection::getSectionSize() const
|
|
{
|
|
return (fEndRowId - fStartRowId + 1) * fColWidth;
|
|
}
|
|
|
|
}
|