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/* Copyright (C) 2000 MySQL AB
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
/* This implements 'user defined functions' */
#include <drizzled/server_includes.h>
#include <drizzled/gettext.h>
#include <drizzled/sql_udf.h>
#include <map>
#include <string>
using namespace std;
static bool udf_startup= false; /* We do not lock because startup is single threaded */
static map<string, Function_builder *> udf_map;
/* This is only called if using_udf_functions != 0 */
Function_builder *find_udf(const char *name, uint32_t length)
{
/**
* @todo: check without transform, then check with transform if needed
*/
Function_builder *udf= NULL;
if (udf_startup == false)
return NULL;
string find_str(name, length);
transform(find_str.begin(), find_str.end(),
find_str.begin(), ::tolower);
map<string, Function_builder *>::iterator find_iter;
find_iter= udf_map.find(find_str);
if (find_iter != udf_map.end())
udf= (*find_iter).second;
return (udf);
}
static bool add_udf(Function_builder *udf)
{
/**
* @todo: add all lower and all upper version
*/
string add_str= udf->get_name();
transform(add_str.begin(), add_str.end(),
add_str.begin(), ::tolower);
udf_map[add_str]= udf;
using_udf_functions= 1;
return true;
}
static bool remove_udf(Function_builder *udf)
{
return udf_map.erase(udf->get_name());
}
int initialize_udf(st_plugin_int *plugin)
{
Function_builder *f;
udf_startup= true;
if (plugin->plugin->init)
{
int r;
if ((r= plugin->plugin->init((void *)&f)))
{
errmsg_printf(ERRMSG_LVL_ERROR,
_("Plugin '%s' init function returned error %d."),
plugin->name.str, r);
return r;
}
}
else
return 1;
if (!add_udf(f))
return 1;
plugin->data= f;
return 0;
}
int finalize_udf(st_plugin_int *plugin)
{
Function_builder *udf = static_cast<Function_builder *>(plugin->data);
if (udf != NULL)
{
remove_udf(udf);
if (plugin->plugin->deinit)
{
if (plugin->plugin->deinit((void *)udf))
{
/* TRANSLATORS: The leading word "udf" is the name
of the plugin api, and so should not be translated. */
errmsg_printf(ERRMSG_LVL_ERROR, _("udf plugin '%s' deinit() failed"),
plugin->name.str);
}
}
}
return 0;
}
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