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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
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* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
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* Copyright (C) 2000 MySQL AB
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* Copyright (C) 2008, 2009 Sun Microsystems, Inc.
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of 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 St, Fifth Floor, Boston, MA 02110-1301 USA
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/* Copyright (C) 2000 MySQL AB
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
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/* This implements 'user defined functions' */
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#include <drizzled/server_includes.h>
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#include <drizzled/gettext.h>
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#include "drizzled/hash.h"
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#include "drizzled/plugin/function.h"
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typedef hash_map<string, const plugin::Function *> UdfMap;
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static UdfMap udf_registry;
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bool plugin::Function::addPlugin(const plugin::Function *udf)
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string lower_name(udf->getName());
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transform(lower_name.begin(), lower_name.end(),
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lower_name.begin(), ::tolower);
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if (udf_registry.find(lower_name) != udf_registry.end())
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errmsg_printf(ERRMSG_LVL_ERROR,
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_("A function named %s already exists!\n"),
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udf->getName().c_str());
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pair<UdfMap::iterator, bool> ret=
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udf_registry.insert(make_pair(lower_name, udf));
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if (ret.second == false)
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errmsg_printf(ERRMSG_LVL_ERROR,
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_("Could not add Function!\n"));
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void plugin::Function::removePlugin(const plugin::Function *udf)
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string lower_name(udf->getName());
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transform(lower_name.begin(), lower_name.end(),
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lower_name.begin(), ::tolower);
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udf_registry.erase(lower_name);
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const plugin::Function *plugin::Function::get(const char *name, size_t length)
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string lower_name(name, length);
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transform(lower_name.begin(), lower_name.end(),
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lower_name.begin(), ::tolower);
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UdfMap::iterator iter= udf_registry.find(lower_name);
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if (iter == udf_registry.end())
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#include <mysys/hash.h>
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#include <drizzled/sql_udf.h>
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static bool udf_startup= false; /* We do not lock because startup is single threaded */
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extern "C" unsigned char* get_hash_key(const unsigned char *buff, size_t *length,
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bool not_used __attribute__((unused)))
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udf_func *udf= (udf_func*) buff;
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*length= (uint) udf->name.length;
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return (unsigned char*) udf->name.str;
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init_sql_alloc(&mem, UDF_ALLOC_BLOCK_SIZE, 0);
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if (hash_init(&udf_hash, system_charset_info, 32, 0, 0, get_hash_key, NULL, 0))
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errmsg_printf(ERRMSG_LVL_ERROR, _("Can't allocate memory for udf structures"));
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free_root(&mem, MYF(0));
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/* called by mysqld.cc clean_up() */
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free_root(&mem, MYF(0));
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/* This is only called if using_udf_functions != 0 */
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udf_func *find_udf(const char *name, uint32_t length)
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if (udf_startup == false)
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return (*iter).second;
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} /* namespace drizzled */
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udf= (udf_func*) hash_search(&udf_hash,
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(unsigned char*) name,
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length ? length : (uint) strlen(name));
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static bool add_udf(udf_func *udf)
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if (my_hash_insert(&udf_hash, (unsigned char*) udf))
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using_udf_functions= 1;
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int initialize_udf(st_plugin_int *plugin)
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if (udf_startup == false)
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if (plugin->plugin->init)
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if ((r= plugin->plugin->init((void *)&f)))
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errmsg_printf(ERRMSG_LVL_ERROR, "Plugin '%s' init function returned error %d.",
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int finalize_udf(st_plugin_int *plugin)
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udf_func *udff = (udf_func *)plugin->data;
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/* TODO: Issue warning on failure */
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if (udff && plugin->plugin->deinit)
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(void)plugin->plugin->deinit(udff);