~drizzle-trunk/drizzle/development : contents of plugin/length/length.cc at revision 1531.2.31

~drizzle-trunk/drizzle/development : (revision 1531.2.31)

/* -*- 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 "config.h"
#include <drizzled/function/math/int.h>
#include <drizzled/plugin/function.h>

using namespace std;
using namespace drizzled;

class LengthFunction :public Item_int_func
{
  String value;
public:
  int64_t val_int();
  LengthFunction() :Item_int_func() {}
  
  const char *func_name() const 
  { 
    return "length"; 
  }
  
  void fix_length_and_dec() 
  { 
    max_length= 10; 
  }

  bool check_argument_count(int n)
  {
    return (n == 1);
  }
};

int64_t LengthFunction::val_int()
{
  assert(fixed == true);
  String *res=args[0]->val_str(&value);
  
  if (res == NULL)
  {
    null_value= true;
    return 0;
  }

  null_value= false;
  return (int64_t) res->length();
}

plugin::Create_function<LengthFunction> *lengthudf= NULL;
plugin::Create_function<LengthFunction> *octet_lengthudf= NULL;

static int initialize(drizzled::module::Context &context)
{
  lengthudf= new plugin::Create_function<LengthFunction>("length");
  octet_lengthudf= new plugin::Create_function<LengthFunction>("octet_length");
  context.add(lengthudf);
  context.add(octet_lengthudf);
  return 0;
}

DRIZZLE_DECLARE_PLUGIN
{
  DRIZZLE_VERSION_ID,
  "length",
  "1.0",
  "Devananda van der Veen",
  "Return the byte length of a string",
  PLUGIN_LICENSE_GPL,
  initialize, /* Plugin Init */
  NULL,   /* system variables */
  NULL    /* config options */
}
DRIZZLE_DECLARE_PLUGIN_END;

1086.9.1 by Devananda refactored function/length into plugin/length	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
1241.9.36 by Monty Taylor ZOMG. I deleted drizzled/server_includes.h.	20	#include "config.h"
1086.9.1 by Devananda refactored function/length into plugin/length	21	#include <drizzled/function/math/int.h>
1130.1.9 by Monty Taylor Changed some plugins from including slots to include plugins. Oops.	22	#include <drizzled/plugin/function.h>
1086.9.1 by Devananda refactored function/length into plugin/length	23
	24	using namespace std;
1093.1.62 by Monty Taylor Moved UDFs to slot organization.	25	using namespace drizzled;
1086.9.1 by Devananda refactored function/length into plugin/length	26
	27	class LengthFunction :public Item_int_func
	28	{
	29	String value;
	30	public:
	31	int64_t val_int();
	32	LengthFunction() :Item_int_func() {}
	33
	34	const char *func_name() const
	35	{
	36	return "length";
	37	}
	38
	39	void fix_length_and_dec()
	40	{
	41	max_length= 10;
	42	}
	43
	44	bool check_argument_count(int n)
	45	{
1086.10.3 by devananda formatting cleanup	46	return (n == 1);
1086.9.1 by Devananda refactored function/length into plugin/length	47	}
	48	};
	49
	50	int64_t LengthFunction::val_int()
	51	{
1086.10.3 by devananda formatting cleanup	52	assert(fixed == true);
1086.9.1 by Devananda refactored function/length into plugin/length	53	String *res=args[0]->val_str(&value);
	54
1086.10.3 by devananda formatting cleanup	55	if (res == NULL)
1086.9.1 by Devananda refactored function/length into plugin/length	56	{
1086.10.3 by devananda formatting cleanup	57	null_value= true;
1086.10.3 by devananda formatting cleanup	58	return 0;
1086.9.1 by Devananda refactored function/length into plugin/length	59	}
	60
1086.10.3 by devananda formatting cleanup	61	null_value= false;
1086.9.1 by Devananda refactored function/length into plugin/length	62	return (int64_t) res->length();
	63	}
	64
1093.1.62 by Monty Taylor Moved UDFs to slot organization.	65	plugin::Create_function<LengthFunction> *lengthudf= NULL;
1228.3.1 by Monty Taylor Removed NameMap. Also remove the aliases from the plugin, since we can just	66	plugin::Create_function<LengthFunction> *octet_lengthudf= NULL;
1086.9.1 by Devananda refactored function/length into plugin/length	67
1530.2.6 by Monty Taylor Moved plugin::Context to module::Context.	68	static int initialize(drizzled::module::Context &context)
1086.9.1 by Devananda refactored function/length into plugin/length	69	{
1093.1.62 by Monty Taylor Moved UDFs to slot organization.	70	lengthudf= new plugin::Create_function<LengthFunction>("length");
1228.3.1 by Monty Taylor Removed NameMap. Also remove the aliases from the plugin, since we can just	71	octet_lengthudf= new plugin::Create_function<LengthFunction>("octet_length");
1324.2.2 by Monty Taylor Use the plugin::Context everywhere.	72	context.add(lengthudf);
	73	context.add(octet_lengthudf);
1086.9.1 by Devananda refactored function/length into plugin/length	74	return 0;
	75	}
	76
1228.1.5 by Monty Taylor Merged in some naming things.	77	DRIZZLE_DECLARE_PLUGIN
1086.9.1 by Devananda refactored function/length into plugin/length	78	{
1241.10.2 by Monty Taylor Added support for embedding the drizzle version number in the plugin file.	79	DRIZZLE_VERSION_ID,
1086.9.1 by Devananda refactored function/length into plugin/length	80	"length",
	81	"1.0",
	82	"Devananda van der Veen",
	83	"Return the byte length of a string",
	84	PLUGIN_LICENSE_GPL,
	85	initialize, /* Plugin Init */
	86	NULL, /* system variables */
	87	NULL /* config options */
	88	}
1228.1.5 by Monty Taylor Merged in some naming things.	89	DRIZZLE_DECLARE_PLUGIN_END;