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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Copyright (C) 2010 Tim Penhey <tim@penhey.net>
*
* 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 St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config.h"
#include <drizzled/plugin/function.h>
#include <drizzled/item/func.h>
#include <drizzled/function/str/strfunc.h>
#include <string>
#include <sstream>
#include <iostream>
using namespace drizzled;
namespace rot13
{
char const* name= "rot13";
namespace
{
std::string rot13(std::string const& s)
{
std::ostringstream sout;
for (std::size_t i= 0, max= s.length(); i < max; ++i)
{
const char& c= s[i];
if ((c >= 'a' && c <= 'm') || (c >= 'A' && c <= 'M'))
sout << char(c + 13);
else if ((c >= 'n' && c <= 'z') || (c >= 'N' && c <= 'Z'))
sout << char(c - 13);
else
sout << c;
}
return sout.str();
}
} // anon namespace
class Function : public Item_str_func
{
public:
Function() : Item_str_func() {}
const char *func_name() const { return rot13::name; }
String *val_str(String *s)
{
String val;
String *other= args[0]->val_str(&val);
std::string to_rot= String_to_std_string(*other);
return set_String_from_std_string(s, rot13(to_rot));
};
void fix_length_and_dec()
{
max_length= args[0]->max_length;
}
bool check_argument_count(int n)
{
return (n == 1);
}
};
using plugin::Create_function;
using plugin::Registry;
typedef Create_function<Function> PluginFunction;
PluginFunction *rot13_func= NULL;
static int init(Registry ®istry)
{
rot13_func= new PluginFunction(rot13::name);
registry.add(rot13_func);
return 0;
}
static int deinit(Registry ®istry)
{
registry.remove(rot13_func);
delete rot13_func;
return 0;
}
} /* namespace rot13 */
DRIZZLE_PLUGIN(rot13::init, rot13::deinit, NULL);
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