~drizzle-trunk/drizzle/development : contents of plugin/crc32/crc32udf.cc at revision 779.1.3

~drizzle-trunk/drizzle/development : (revision 779.1.3)

/* -*- 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/server_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;

584.1.15 by Monty Taylor The mega-patch from hell. Renamed sql_class to session (since that's what it is) and removed it and field and table from common_includes.	1	/* -- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; --
	2	* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
	3	*
	4	* Copyright (C) 2008 Sun Microsystems
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; version 2 of the License.
	9	*
	10	* This program is distributed in the hope that it will be useful,
	11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	* GNU General Public License for more details.
	14	*
	15	* You should have received a copy of the GNU General Public License
	16	* along with this program; if not, write to the Free Software
	17	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	18	*/
	19
670.2.2 by Monty Taylor Got rid of the rest of common_includes. Now on to server_includes.	20	#include <drizzled/server_includes.h>
584.1.15 by Monty Taylor The mega-patch from hell. Renamed sql_class to session (since that's what it is) and removed it and field and table from common_includes.	21	#include <drizzled/sql_udf.h>
584.4.6 by Monty Taylor Moved stuff into item/	22	#include <drizzled/item/func.h>
139.1.2 by Stewart Smith CRC32() as UDF	23	#include <zlib.h>
139.1.2 by Stewart Smith CRC32() as UDF	24
139.1.8 by Stewart Smith UDFs are now normal Item_func objects. Simplifies handling them a lot.	25	class Item_func_crc32 :public Item_int_func
	26	{
	27	String value;
	28	public:
	29	Item_func_crc32() :Item_int_func() { unsigned_flag= 1; }
	30	const char *func_name() const { return "crc32"; }
	31	void fix_length_and_dec() { max_length=10; }
	32	int64_t val_int();
	33	};
	34
	35	int64_t Item_func_crc32::val_int()
	36	{
	37	assert(fixed == 1);
	38	String *res=args[0]->val_str(&value);
	39	if (!res)
	40	{
	41	null_value=1;
	42	return 0; /* purecov: inspected */
	43	}
	44	null_value=0;
481 by Brian Aker Remove all of uchar.	45	return (int64_t) crc32(0L, (unsigned char*)res->ptr(), res->length());
139.1.8 by Stewart Smith UDFs are now normal Item_func objects. Simplifies handling them a lot.	46	}
	47
	48	Item_func* create_crc32udf_item(MEM_ROOT* m)
	49	{
	50	return new (m) Item_func_crc32();
	51	}
	52
	53	static struct udf_func crc32udf = {
	54	{ C_STRING_WITH_LEN("crc32") },
	55	create_crc32udf_item
	56	};
139.1.2 by Stewart Smith CRC32() as UDF	57
	58	static int crc32udf_plugin_init(void *p)
	59	{
139.1.8 by Stewart Smith UDFs are now normal Item_func objects. Simplifies handling them a lot.	60	udf_func f = (udf_func) p;
	61
	62	*f= &crc32udf;
139.1.2 by Stewart Smith CRC32() as UDF	63
	64	return 0;
	65	}
	66
	67	static int crc32udf_plugin_deinit(void *p)
	68	{
	69	udf_func udff = (udf_func ) p;
139.1.4 by Stewart Smith merge mainline and update md5 and crc32 plugins to new interface	70	(void)udff;
139.1.2 by Stewart Smith CRC32() as UDF	71	return 0;
	72	}
	73
139.1.4 by Stewart Smith merge mainline and update md5 and crc32 plugins to new interface	74	mysql_declare_plugin(crc32)
139.1.2 by Stewart Smith CRC32() as UDF	75	{
319.1.1 by Grant Limberg renamed all instances of MYSQL_ to DRIZZLE_	76	DRIZZLE_UDF_PLUGIN,
139.1.2 by Stewart Smith CRC32() as UDF	77	"crc32",
139.1.4 by Stewart Smith merge mainline and update md5 and crc32 plugins to new interface	78	"1.0",
139.1.2 by Stewart Smith CRC32() as UDF	79	"Stewart Smith",
	80	"UDF for computing CRC32",
	81	PLUGIN_LICENSE_GPL,
	82	crc32udf_plugin_init, /* Plugin Init */
	83	crc32udf_plugin_deinit, /* Plugin Deinit */
	84	NULL, /* status variables */
	85	NULL, /* system variables */
	86	NULL /* config options */
	87	}
	88	mysql_declare_plugin_end;