~drizzle-trunk/drizzle/development

/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-

 *  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:

 *

 *  Copyright (C) 2000 MySQL AB

 *  Copyright (C) 2008, 2009 Sun Microsystems, 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 St, Fifth Floor, Boston, MA  02110-1301  USA

 */

/* This implements 'user defined functions' */

#include "config.h"

#include <drizzled/unordered_map.h>

#include <drizzled/gettext.h>

#include "drizzled/plugin/function.h"

using namespace std;

namespace drizzled

{

typedef unordered_map<string, const plugin::Function *> UdfMap;

static UdfMap udf_registry;

bool plugin::Function::addPlugin(const plugin::Function *udf)

{

  string lower_name(udf->getName());

  transform(lower_name.begin(), lower_name.end(),

            lower_name.begin(), ::tolower);

  if (udf_registry.find(lower_name) != udf_registry.end())

  {

    errmsg_printf(ERRMSG_LVL_ERROR,

                  _("A function named %s already exists!\n"),

                  udf->getName().c_str());

    return true;

  }

  pair<UdfMap::iterator, bool> ret=

    udf_registry.insert(make_pair(lower_name, udf));

  if (ret.second == false)

  {

    errmsg_printf(ERRMSG_LVL_ERROR,

                  _("Could not add Function!\n"));

    return true;

  }

  return false;

}

void plugin::Function::removePlugin(const plugin::Function *udf)

{

  string lower_name(udf->getName());

  transform(lower_name.begin(), lower_name.end(),

            lower_name.begin(), ::tolower);

  udf_registry.erase(lower_name);

}

const plugin::Function *plugin::Function::get(const char *name, size_t length)

{

  string lower_name(name, length);

  transform(lower_name.begin(), lower_name.end(),

            lower_name.begin(), ::tolower);

  UdfMap::iterator iter= udf_registry.find(lower_name);

  if (iter == udf_registry.end())

  {

    return NULL;

  }

  return (*iter).second;

}

} /* namespace drizzled */