You've already forked mariadb-columnstore-engine
mirror of
https://github.com/mariadb-corporation/mariadb-columnstore-engine.git
synced 2025-11-03 17:13:17 +03:00
117 lines
2.6 KiB
C++
117 lines
2.6 KiB
C++
/* Copyright (C) 2014 InfiniDB, Inc.
|
|
|
|
This program is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU General Public License
|
|
as published by the Free Software Foundation; version 2 of
|
|
the License.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
|
|
MA 02110-1301, USA. */
|
|
|
|
/****************************************************************************
|
|
* $Id: func_unhex.cpp 3923 2013-06-19 21:43:06Z bwilkinson $
|
|
*
|
|
*
|
|
****************************************************************************/
|
|
|
|
#include <cstdlib>
|
|
#include <string>
|
|
#include <sstream>
|
|
using namespace std;
|
|
|
|
#include "functor_str.h"
|
|
#include "funchelpers.h"
|
|
#include "functioncolumn.h"
|
|
#include "rowgroup.h"
|
|
using namespace execplan;
|
|
|
|
#include "dataconvert.h"
|
|
|
|
namespace
|
|
{
|
|
inline int hex_to_int(char c, bool& isNull)
|
|
{
|
|
if (c <= '9' && c >= '0')
|
|
return c - '0';
|
|
|
|
c |= 32;
|
|
|
|
if (c <= 'f' && c >= 'a')
|
|
return c - 'a' + 10;
|
|
|
|
isNull = true;
|
|
return -1;
|
|
}
|
|
|
|
inline string cleanup(char* to)
|
|
{
|
|
delete[] to;
|
|
return "";
|
|
}
|
|
} // namespace
|
|
|
|
namespace funcexp
|
|
{
|
|
CalpontSystemCatalog::ColType Func_unhex::operationType(FunctionParm& /*fp*/,
|
|
CalpontSystemCatalog::ColType& resultType)
|
|
{
|
|
return resultType;
|
|
}
|
|
|
|
string Func_unhex::getStrVal(rowgroup::Row& row, FunctionParm& parm, bool& isNull,
|
|
CalpontSystemCatalog::ColType& /*op_ct*/)
|
|
{
|
|
const auto& nfrom = parm[0]->data()->getStrVal(row, isNull);
|
|
|
|
if (nfrom.isNull())
|
|
return "";
|
|
|
|
const auto& from = nfrom.unsafeStringRef();
|
|
|
|
char* to = new char[2 + from.size() / 2];
|
|
|
|
uint64_t from_pos = 0, to_pos = 0;
|
|
int hex_char = 0;
|
|
|
|
if (from.size() % 2)
|
|
{
|
|
hex_char = hex_to_int(from[from_pos++], isNull);
|
|
|
|
if (hex_char == -1)
|
|
return cleanup(to);
|
|
|
|
to[to_pos++] = hex_char;
|
|
}
|
|
|
|
for (; from_pos < from.size(); from_pos += 2)
|
|
{
|
|
hex_char = hex_to_int(from[from_pos], isNull) << 4;
|
|
|
|
if (hex_char == -1)
|
|
return cleanup(to);
|
|
|
|
to[to_pos] = hex_char;
|
|
hex_char = hex_to_int(from[from_pos + 1], isNull);
|
|
|
|
if (hex_char == -1)
|
|
return cleanup(to);
|
|
|
|
to[to_pos++] |= hex_char;
|
|
}
|
|
|
|
to[to_pos] = 0;
|
|
string tmp = string(to);
|
|
delete[] to;
|
|
|
|
return tmp;
|
|
}
|
|
|
|
} // namespace funcexp
|