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81 lines
2.5 KiB
C++
81 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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#include "utils_utf8.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, 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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size_t Func_instr::in_str(const string& str, const string& substr, size_t start)
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{
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// convert both inputs to wide character strings
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std::wstring wcstr = utf8::utf8_to_wstring(str);
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std::wstring wcsubstr = utf8::utf8_to_wstring(substr);
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if ((str.length() && !wcstr.length()) ||
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(substr.length() && !wcsubstr.length()))
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// this means one or both of the strings had conversion errors to wide character
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return 0;
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size_t pos = wcstr.find(wcsubstr, start - 1);
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return (pos != string::npos ? pos + 1 : 0);
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}
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int64_t Func_instr::getIntVal(rowgroup::Row& row,
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FunctionParm& parm,
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bool& isNull,
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CalpontSystemCatalog::ColType&)
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{
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uint64_t start = 1;
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if (parm.size() == 3)
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start = parm[2]->data()->getIntVal(row, isNull);
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if (isNull || start == 0)
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return 0;
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//Bug 5110 : to support utf8 char type, we have to convert and search
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return in_str(parm[0]->data()->getStrVal(row, isNull), parm[1]->data()->getStrVal(row, isNull), start);
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}
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} // namespace funcexp
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// vim:ts=4 sw=4:
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