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7158253b88
Func_crc32::getIntVal(): Support the 2-ary CRC32() variant (MDEV-27208). Also, do not assume that the string contains no NUL bytes.
75 lines
2.0 KiB
C++
75 lines
2.0 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: func_crc32.cpp 3923 2013-06-19 21:43:06Z bwilkinson $
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*
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*
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****************************************************************************/
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#include <unistd.h>
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#include <cstdlib>
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#include <string>
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#include <sstream>
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using namespace std;
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#include "functor_int.h"
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#include "functioncolumn.h"
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#include "rowgroup.h"
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using namespace execplan;
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#ifndef _MSC_VER
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#include "zlib.h"
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#endif
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namespace funcexp
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{
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CalpontSystemCatalog::ColType Func_crc32::operationType( FunctionParm& fp, CalpontSystemCatalog::ColType& resultType )
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{
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return resultType;
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}
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int64_t Func_crc32::getIntVal(rowgroup::Row& row,
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FunctionParm& parm,
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bool& isNull,
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CalpontSystemCatalog::ColType& ct)
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{
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unsigned crc;
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switch (parm.size) {
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default:
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isNull = true;
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return 0;
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case 1:
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crc = 0;
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break;
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case 2:
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crc = static_cast<unsigned>(parm[0]->data()->getIntVal(row, isNull));
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if (isNull)
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return 0;
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}
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const string& b = parm[parm.size - 1]->data()->getStrVal(row, isNull);
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if (isNull)
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return 0;
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return crc32(crc, reinterpret_cast<unsigned char*>(b.data()), b.size());
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}
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} // namespace funcexp
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// vim:ts=4 sw=4:
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