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118 lines
3.1 KiB
C++
118 lines
3.1 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_insert.cpp 2477 2011-04-01 16:07:35Z rdempsey $
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*
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*
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****************************************************************************/
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#include <string>
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using namespace std;
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#include "functor_str.h"
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#include "functioncolumn.h"
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using namespace execplan;
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#include "rowgroup.h"
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using namespace rowgroup;
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#include "joblisttypes.h"
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using namespace joblist;
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#include "utf8.h"
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using namespace utf8;
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#define STRCOLL_ENH__
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namespace funcexp
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{
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CalpontSystemCatalog::ColType Func_insert::operationType(FunctionParm& fp, CalpontSystemCatalog::ColType& resultType)
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{
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// operation type is not used by this functor
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return fp[0]->data()->resultType();
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}
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string insertStr(const string& src, int pos, int len, const string& targ)
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{
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int64_t strLen = static_cast<int64_t>(src.length());
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if ((pos <= 0) || ((pos - 1) >= strLen))
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return src;
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if ((len < 0) || (len > strLen))
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len = strLen;
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const char* srcptr = src.c_str();
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advance(srcptr, pos - 1, srcptr + strLen);
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// srcptr now pointing to where we need to insert targ string
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uint32_t srcPos = srcptr - src.c_str();
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uint32_t finPos = strLen;
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const char* finptr = src.c_str();
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if ((strLen - (pos - 1 + len)) >= 0)
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{
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advance(finptr, (pos - 1 + len), finptr + strLen);
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// finptr now pointing to the end of the string to replace
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finPos = finptr - src.c_str();
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}
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string out;
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out.reserve(srcPos + targ.length() + strLen - finPos + 1);
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out.append( src.c_str(), srcPos );
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out.append( targ.c_str(), targ.length() );
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out.append( src.c_str() + finPos, strLen - finPos );
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return out;
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}
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std::string Func_insert::getStrVal(rowgroup::Row& row,
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FunctionParm& fp,
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bool& isNull,
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execplan::CalpontSystemCatalog::ColType&)
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{
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const string& tstr = stringValue(fp[0], row, isNull);
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if (isNull)
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return "";
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const string& tnewstr = stringValue(fp[3], row, isNull);
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if (isNull)
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return "";
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int64_t pos = fp[1]->data()->getIntVal(row, isNull);
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if (isNull)
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return "";
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int64_t len = fp[2]->data()->getIntVal(row, isNull);
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if (isNull)
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return "";
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return insertStr( tstr, pos, len, tnewstr );
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}
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} // namespace funcexp
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// vim:ts=4 sw=4:
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