TupleData.cpp

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/*
// $Id: //open/dev/fennel/tuple/TupleData.cpp#18 $
// Fennel is a library of data storage and processing components.
// Copyright (C) 2005-2009 The Eigenbase Project
// Copyright (C) 2005-2009 SQLstream, Inc.
// Copyright (C) 2005-2009 LucidEra, Inc.
// Portions Copyright (C) 1999-2009 John V. Sichi
//
// 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; either version 2 of the License, or (at your option)
// any later version approved by The Eigenbase Project.
//
// 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

#include "fennel/common/CommonPreamble.h"
#include "fennel/tuple/TupleData.h"
#include "fennel/tuple/TupleDescriptor.h"

FENNEL_BEGIN_CPPFILE("$Id: //open/dev/fennel/tuple/TupleData.cpp#18 $");

void TupleDatum::memCopyFrom(TupleDatum const &other)
{
    cbData = other.cbData;

    /*
     * Performs memcpy from "other".
     * Sets pData to NULL if it is NULL in "other".
     */
    if (other.pData) {
        memcpy(
            const_cast<PBuffer>(pData),
            other.pData,
            other.cbData);
    } else {
        pData = other.pData;
    }
}

void TupleData::compute(TupleDescriptor const &tupleDesc)
{
    clear();
    for (uint i = 0; i < tupleDesc.size(); ++i) {
        TupleDatum datum;
        datum.cbData = tupleDesc[i].cbStorage;
        push_back(datum);
    }
}

bool TupleData::containsNull() const
{
    for (uint i = 0; i < size(); ++i) {
        if (!(*this)[i].pData) {
            return true;
        }
    }
    return false;
}

bool TupleData::containsNull(TupleProjection const & tupleProj) const
{
    for (uint i = 0; i < tupleProj.size(); ++i) {
        if (!(*this)[tupleProj[i]].pData) {
            return true;
        }
    }
    return false;
}

void TupleData::projectFrom(
    TupleData const& src,
    TupleProjection const& projection)
{
    clear();
    for (uint i = 0; i < projection.size(); ++i) {
        push_back(src[projection[i]]);
    }
}

FENNEL_END_CPPFILE("$Id: //open/dev/fennel/tuple/TupleData.cpp#18 $");

// End TupleData.cpp

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