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https://github.com/mariadb-corporation/mariadb-columnstore-engine.git
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88 lines
2.5 KiB
C++
88 lines
2.5 KiB
C++
/* Copyright (C) 2014 InfiniDB, Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; version 2 of
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the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA. */
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/*****************************************************************************
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* $Id: we_colbufsec.cpp 4450 2013-01-21 14:13:24Z rdempsey $
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*
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****************************************************************************/
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/** @file
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* Implementation of the ColumnBufferSection class
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*/
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#include "we_colbufsec.h"
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namespace WriteEngine {
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ColumnBufferSection::ColumnBufferSection(
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ColumnBuffer * const cb,
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RID sRowId,
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RID eRowId,
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int width,
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int sOffset)
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:fCBuf(cb),
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fStartRowId(sRowId),
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fEndRowId(eRowId),
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fColWidth(width),
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fBufStartOffset(sOffset),
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fCurrRowId(sRowId),
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fStatus(INIT_COMPLETE) {
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}
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ColumnBufferSection::~ColumnBufferSection() {
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}
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void ColumnBufferSection::write(const void * const data, int nRows) {
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//Casting void * to unsigned char * without modifying the constness
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const unsigned char * const tData =
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static_cast<const unsigned char * const>(data);
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if(fCurrRowId + nRows + 1> fEndRowId) {
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//TODO: Handle error (old-dmc)
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}
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int startOffset = (fBufStartOffset + (fCurrRowId-fStartRowId) *
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fColWidth) % fCBuf->getSize();
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int nBytes = nRows * fColWidth;
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int bytesWritten = 0;
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if((startOffset + nBytes) > fCBuf->getSize()) {
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fCBuf->write(tData, startOffset, fCBuf->getSize() - startOffset);
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bytesWritten = fCBuf->getSize() - startOffset;
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startOffset = 0;
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}
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fCBuf->write(tData + bytesWritten, startOffset, nBytes - bytesWritten);
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fCurrRowId += nRows;
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}
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void ColumnBufferSection::setStatus(int s) {
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fStatus = s;
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}
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int ColumnBufferSection::getStatus() const {
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return fStatus;
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}
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int ColumnBufferSection::getStartOffset() const {
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return fBufStartOffset;
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}
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int ColumnBufferSection::getSectionSize() const {
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return (fEndRowId - fStartRowId + 1) * fColWidth;
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}
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}
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