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
104 lines
2.4 KiB
C++
104 lines
2.4 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
|
|
{
|
|
int64_t hex_to_int(char c)
|
|
{
|
|
if (c <= '9' && c >= '0')
|
|
return c-'0';
|
|
c = toupper(c);
|
|
if (c <= 'F' && c >= 'A')
|
|
return c-'A'+10;
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
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 string& from = parm[0]->data()->getStrVal(row, isNull);
|
|
char* to = new char[2 + from.length()/2];
|
|
if (!to)
|
|
{
|
|
isNull = true;
|
|
return "";
|
|
}
|
|
|
|
uint64_t from_pos = 0, to_pos = 0;
|
|
int64_t hex_char = 0;
|
|
if (strlen(from.c_str()) % 2)
|
|
{
|
|
hex_char = hex_to_int(from[from_pos++]);
|
|
to[to_pos++] = hex_char;
|
|
if (hex_char == -1)
|
|
goto nullHandling;
|
|
}
|
|
|
|
for (; from_pos < strlen(from.c_str()); from_pos+=2)
|
|
{
|
|
hex_char = hex_to_int(from[from_pos]) << 4;
|
|
if (hex_char == -1)
|
|
goto nullHandling;
|
|
to[to_pos] = hex_char;
|
|
hex_char = hex_to_int(from[from_pos+1]);
|
|
if (hex_char == -1)
|
|
goto nullHandling;
|
|
to[to_pos++] |= hex_char;
|
|
}
|
|
to[to_pos] = 0;
|
|
return string(to);
|
|
|
|
nullHandling:
|
|
isNull = true;
|
|
return "";
|
|
}
|
|
|
|
|
|
} // namespace funcexp
|
|
// vim:ts=4 sw=4:
|