/*
 Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
 
 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License, version 2.0,
 as published by the Free Software Foundation.

 This program is also distributed with certain software (including
 but not limited to OpenSSL) that is licensed under separate terms,
 as designated in a particular file or component or in included license
 documentation.  The authors of MySQL hereby grant you an additional
 permission to link the program and your derivative works with the
 separately licensed software that they have included with MySQL.

 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, version 2.0, 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
 */

/* CharsetMapImpl
 *
 * The private singleton implementation behind the public CharsetMap class
 *
 */

#include "NdbMutex.h"

#define CHARSET_MAP_HASH_TABLE_SIZE 256

class MapTableItem 
{
public:
    MapTableItem() : name(0), value(0), next(0) {};
    const char *name;
    const char *value;
    MapTableItem *next;
};


class CharsetMapImpl : public NdbLockable 
{
public:    
    CharsetMapImpl() : NdbLockable() , ready(0) , collisions(0) {};
       
    /** getName() returns a character set name that in most cases 
     will be a preferred name from 
     http://www.iana.org/assignments/character-sets and will be recognized 
     and usable by Java (e.g. java.nio, java.io, and java.lang).  
     However it may return "binary" if a column is BLOB / BINARY / VARBINARY,
     or it may return the name of an uncommon, rarely-used MySQL character set
     such as "keybcs2" or "dec8".
     */
    const char * getName(int);
            
    const char * mysql_charset_name[256];

    int UTF16Charset;
    int UTF8Charset;

    void build_map();
    int ready;
    int collisions;
    int n_items;

private:
    void put(const char *, const char *);
    const char * get(const char *) const;
    int hash(const char *) const;
    MapTableItem map[CHARSET_MAP_HASH_TABLE_SIZE];
};