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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: func_instr.cpp 3645 2013-03-19 13:10:24Z rdempsey $
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*
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*
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****************************************************************************/
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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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namespace funcexp
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{
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CalpontSystemCatalog::ColType Func_instr::operationType(FunctionParm& /*fp*/,
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CalpontSystemCatalog::ColType& /*resultType*/)
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{
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CalpontSystemCatalog::ColType ct;
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ct.colDataType = CalpontSystemCatalog::VARCHAR;
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ct.colWidth = 255;
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return ct;
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}
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int64_t Func_instr::getIntVal(rowgroup::Row& row, FunctionParm& parm, bool& isNull,
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CalpontSystemCatalog::ColType& colType)
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{
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int64_t start = 0;
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int64_t start0 = 0;
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my_match_t match;
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const auto& str = parm[0]->data()->getStrVal(row, isNull);
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if (str.isNull())
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return 0;
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const char* s1 = str.str();
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uint32_t l1 = (uint32_t)str.length();
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const auto& substr = parm[1]->data()->getStrVal(row, isNull);
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if (substr.isNull())
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return 0;
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const char* s2 = substr.str();
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uint32_t l2 = (uint32_t)substr.length();
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if (l2 < 1)
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return start + 1;
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CHARSET_INFO* cs = colType.getCharset();
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if (parm.size() == 3)
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{
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start0 = start = parm[2]->data()->getIntVal(row, isNull) - 1;
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if ((start < 0) || (start > l1))
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return 0;
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start = (int64_t)cs->charpos(s1, s1 + l1, start); // adjust start for multi-byte
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if (start + l2 > l1) // Substring is longer than str at pos.
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return 0;
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}
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if (!cs->instr(s1 + start, l1 - start, s2, l2, &match, 1))
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return 0;
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return (int64_t)match.mb_len + start0 + 1;
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}
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} // namespace funcexp
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