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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Copyright (C) 2008 Sun Microsystems
*
* 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 <drizzled/common_includes.h>
#include <drizzled/sql_udf.h>
#include <drizzled/item/func.h>
#include <zlib.h>
class Item_func_crc32 :public Item_int_func
{
String value;
public:
Item_func_crc32() :Item_int_func() { unsigned_flag= 1; }
const char *func_name() const { return "crc32"; }
void fix_length_and_dec() { max_length=10; }
int64_t val_int();
};
int64_t Item_func_crc32::val_int()
{
assert(fixed == 1);
String *res=args[0]->val_str(&value);
if (!res)
{
null_value=1;
return 0; /* purecov: inspected */
}
null_value=0;
return (int64_t) crc32(0L, (unsigned char*)res->ptr(), res->length());
}
Item_func* create_crc32udf_item(MEM_ROOT* m)
{
return new (m) Item_func_crc32();
}
static struct udf_func crc32udf = {
{ C_STRING_WITH_LEN("crc32") },
create_crc32udf_item
};
static int crc32udf_plugin_init(void *p)
{
udf_func **f = (udf_func**) p;
*f= &crc32udf;
return 0;
}
static int crc32udf_plugin_deinit(void *p)
{
udf_func *udff = (udf_func *) p;
(void)udff;
return 0;
}
mysql_declare_plugin(crc32)
{
DRIZZLE_UDF_PLUGIN,
"crc32",
"1.0",
"Stewart Smith",
"UDF for computing CRC32",
PLUGIN_LICENSE_GPL,
crc32udf_plugin_init, /* Plugin Init */
crc32udf_plugin_deinit, /* Plugin Deinit */
NULL, /* status variables */
NULL, /* system variables */
NULL /* config options */
}
mysql_declare_plugin_end;
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