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121 lines
3.4 KiB
C++
121 lines
3.4 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_hex.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 <cstdlib>
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#include <string>
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#include <sstream>
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#include <limits>
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using namespace std;
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#include <boost/scoped_array.hpp>
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using namespace boost;
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#include "functor_str.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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#include "funchelpers.h"
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namespace
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{
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char digit_upper[] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
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void octet2hex(char *to, const char *str, uint32_t len)
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{
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const char *str_end= str + len;
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for (; str != str_end; ++str)
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{
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*to++= digit_upper[((uint8_t) *str) >> 4];
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*to++= digit_upper[((uint8_t) *str) & 0x0F];
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}
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*to = '\0';
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}
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}
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namespace funcexp
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{
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CalpontSystemCatalog::ColType Func_hex::operationType( FunctionParm& fp, CalpontSystemCatalog::ColType& resultType )
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{
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return resultType;
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}
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string Func_hex::getStrVal(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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string retval;
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uint64_t dec;
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char ans[65];
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switch (parm[0]->data()->resultType().colDataType)
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{
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case CalpontSystemCatalog::CHAR:
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case CalpontSystemCatalog::VARCHAR:
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case CalpontSystemCatalog::DATETIME:
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case CalpontSystemCatalog::DATE:
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{
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const string& arg= parm[0]->data()->getStrVal(row, isNull);
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scoped_array<char> hexPtr(new char[strlen(arg.c_str())*2+1]);
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octet2hex(hexPtr.get(), arg.c_str(), strlen(arg.c_str()));
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return string(hexPtr.get(), strlen(arg.c_str())*2);
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}
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case CalpontSystemCatalog::DOUBLE:
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case CalpontSystemCatalog::FLOAT:
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case CalpontSystemCatalog::DECIMAL:
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{
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/* Return hex of unsigned longlong value */
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double val= parm[0]->data()->getDoubleVal(row, isNull);
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if ((val <= (double) numeric_limits<int64_t>::min()) ||
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(val >= (double) numeric_limits<int64_t>::max()))
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dec= ~(int64_t) 0;
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else
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dec= (uint64_t) (val + (val > 0 ? 0.5 : -0.5));
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retval = helpers::convNumToStr(dec, ans, 16);
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break;
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}
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case CalpontSystemCatalog::VARBINARY:
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{
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const string& arg = parm[0]->data()->getStrVal(row, isNull);
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uint64_t hexLen = arg.size() * 2;
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scoped_array<char> hexPtr(new char[hexLen + 1]); // "+ 1" for the last \0
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octet2hex(hexPtr.get(), arg.data(), arg.size());
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return string(hexPtr.get(), hexLen);
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}
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default:
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{
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dec= (uint64_t)parm[0]->data()->getIntVal(row, isNull);
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retval = helpers::convNumToStr(dec, ans, 16);
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if (retval.length() > (uint32_t)ct.colWidth)
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retval = retval.substr(retval.length()-ct.colWidth, ct.colWidth);
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}
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}
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return retval;
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}
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} // namespace funcexp
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// vim:ts=4 sw=4:
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