You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
197 lines
8.2 KiB
197 lines
8.2 KiB
// Copyright (c) 2004-2008 MySQL AB, 2008-2009 Sun Microsystems, Inc.
|
|
//
|
|
// This program is free software; you can redistribute it and/or modify
|
|
// it under the terms of the GNU General Public License version 2 as published by
|
|
// the Free Software Foundation
|
|
//
|
|
// There are special exceptions to the terms and conditions of the GPL
|
|
// as it is applied to this software. View the full text of the
|
|
// exception in file EXCEPTIONS in the directory of this software
|
|
// distribution.
|
|
//
|
|
// 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
|
|
|
|
using System;
|
|
using System.Collections;
|
|
using System.Text;
|
|
using MySql.Data.Common;
|
|
using System.Collections.Generic;
|
|
using System.Data;
|
|
|
|
namespace MySql.Data.MySqlClient
|
|
{
|
|
/// <summary>
|
|
/// Summary description for CharSetMap.
|
|
/// </summary>
|
|
internal class CharSetMap
|
|
{
|
|
private static Dictionary<string, string> defaultCollations;
|
|
private static Dictionary<string, int> maxLengths;
|
|
private static Dictionary<string, CharacterSet> mapping;
|
|
private static object lockObject;
|
|
|
|
// we use a static constructor here since we only want to init
|
|
// the mapping once
|
|
static CharSetMap()
|
|
{
|
|
lockObject = new Object();
|
|
InitializeMapping();
|
|
}
|
|
|
|
public static CharacterSet GetCharacterSet(DBVersion version, string CharSetName)
|
|
{
|
|
CharacterSet cs = (CharacterSet) mapping[CharSetName];
|
|
if (cs == null)
|
|
throw new MySqlException("Character set '" + CharSetName + "' is not supported");
|
|
return cs;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Returns the text encoding for a given MySQL character set name
|
|
/// </summary>
|
|
/// <param name="version">Version of the connection requesting the encoding</param>
|
|
/// <param name="CharSetName">Name of the character set to get the encoding for</param>
|
|
/// <returns>Encoding object for the given character set name</returns>
|
|
public static Encoding GetEncoding(DBVersion version, string CharSetName)
|
|
{
|
|
try
|
|
{
|
|
CharacterSet cs = GetCharacterSet(version, CharSetName);
|
|
return Encoding.GetEncoding(cs.name);
|
|
}
|
|
catch (NotSupportedException)
|
|
{
|
|
return Encoding.GetEncoding(0);
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
///
|
|
/// </summary>
|
|
private static void InitializeMapping()
|
|
{
|
|
LoadCharsetMap();
|
|
}
|
|
|
|
private static void LoadCharsetMap()
|
|
{
|
|
mapping = new Dictionary<string, CharacterSet>();
|
|
|
|
mapping.Add("latin1", new CharacterSet("latin1", 1));
|
|
mapping.Add("big5", new CharacterSet("big5", 2));
|
|
mapping.Add("dec8", mapping["latin1"]);
|
|
mapping.Add("cp850", new CharacterSet("ibm850", 1));
|
|
mapping.Add("hp8", mapping["latin1"]);
|
|
mapping.Add("koi8r", new CharacterSet("koi8-u", 1));
|
|
mapping.Add("latin2", new CharacterSet("latin2", 1));
|
|
mapping.Add("swe7", mapping["latin1"]);
|
|
mapping.Add("ujis", new CharacterSet("EUC-JP", 3));
|
|
mapping.Add("eucjpms", mapping["ujis"]);
|
|
mapping.Add("sjis", new CharacterSet("sjis", 2));
|
|
mapping.Add("cp932", mapping["sjis"]);
|
|
mapping.Add("hebrew", new CharacterSet("hebrew", 1));
|
|
mapping.Add("tis620", new CharacterSet("windows-874", 1));
|
|
mapping.Add("euckr", new CharacterSet("euc-kr", 2));
|
|
mapping.Add("euc_kr", mapping["euckr"]);
|
|
mapping.Add("koi8u", new CharacterSet("koi8-u", 1));
|
|
mapping.Add("koi8_ru", mapping["koi8u"]);
|
|
mapping.Add("gb2312", new CharacterSet("gb2312", 2));
|
|
mapping.Add("gbk", mapping["gb2312"]);
|
|
mapping.Add("greek", new CharacterSet("greek", 1));
|
|
mapping.Add("cp1250", new CharacterSet("windows-1250", 1));
|
|
mapping.Add("win1250", mapping["cp1250"]);
|
|
mapping.Add("latin5", new CharacterSet("latin5", 1));
|
|
mapping.Add("armscii8", mapping["latin1"]);
|
|
mapping.Add("utf8", new CharacterSet("utf-8", 3));
|
|
mapping.Add("ucs2", new CharacterSet("UTF-16BE", 2));
|
|
mapping.Add("cp866", new CharacterSet("cp866", 1));
|
|
mapping.Add("keybcs2", mapping["latin1"]);
|
|
mapping.Add("macce", new CharacterSet("x-mac-ce", 1));
|
|
mapping.Add("macroman", new CharacterSet("x-mac-romanian", 1));
|
|
mapping.Add("cp852", new CharacterSet("ibm852", 2));
|
|
mapping.Add("latin7", new CharacterSet("iso-8859-7", 1));
|
|
mapping.Add("cp1251", new CharacterSet("windows-1251", 1));
|
|
mapping.Add("win1251ukr", mapping["cp1251"]);
|
|
mapping.Add("cp1251csas", mapping["cp1251"]);
|
|
mapping.Add("cp1251cias", mapping["cp1251"]);
|
|
mapping.Add("win1251", mapping["cp1251"]);
|
|
mapping.Add("cp1256", new CharacterSet("cp1256", 1));
|
|
mapping.Add("cp1257", new CharacterSet("windows-1257", 1));
|
|
mapping.Add("ascii", new CharacterSet("us-ascii", 1));
|
|
mapping.Add("usa7", mapping["ascii"]);
|
|
mapping.Add("binary", mapping["ascii"]);
|
|
mapping.Add("latin3", new CharacterSet("latin3", 1));
|
|
mapping.Add("latin4", new CharacterSet("latin4", 1));
|
|
mapping.Add("latin1_de", new CharacterSet("iso-8859-1", 1));
|
|
mapping.Add("german1", new CharacterSet("iso-8859-1", 1));
|
|
mapping.Add("danish", new CharacterSet("iso-8859-1", 1));
|
|
mapping.Add("czech", new CharacterSet("iso-8859-2", 1));
|
|
mapping.Add("hungarian", new CharacterSet("iso-8859-2", 1));
|
|
mapping.Add("croat", new CharacterSet("iso-8859-2", 1));
|
|
mapping.Add("latvian", new CharacterSet("iso-8859-13", 1));
|
|
mapping.Add("latvian1", new CharacterSet("iso-8859-13", 1));
|
|
mapping.Add("estonia", new CharacterSet("iso-8859-13", 1));
|
|
mapping.Add("dos", new CharacterSet("ibm437", 1));
|
|
}
|
|
|
|
internal static void InitCollections(MySqlConnection connection)
|
|
{
|
|
defaultCollations = new Dictionary<string, string>();
|
|
maxLengths = new Dictionary<string, int>();
|
|
|
|
MySqlCommand cmd = new MySqlCommand("SHOW CHARSET", connection);
|
|
using (MySqlDataReader reader = cmd.ExecuteReader())
|
|
{
|
|
while (reader.Read())
|
|
{
|
|
defaultCollations.Add(reader.GetString(0), reader.GetString(2));
|
|
maxLengths.Add(reader.GetString(0), Convert.ToInt32(reader.GetValue(3)));
|
|
}
|
|
}
|
|
}
|
|
|
|
internal static string GetDefaultCollation(string charset, MySqlConnection connection)
|
|
{
|
|
lock (lockObject)
|
|
{
|
|
if (defaultCollations == null)
|
|
InitCollections(connection);
|
|
}
|
|
if (!defaultCollations.ContainsKey(charset))
|
|
return null;
|
|
return defaultCollations[charset];
|
|
}
|
|
|
|
internal static int GetMaxLength(string charset, MySqlConnection connection)
|
|
{
|
|
lock (lockObject)
|
|
{
|
|
if (maxLengths == null)
|
|
InitCollections(connection);
|
|
}
|
|
|
|
if (!maxLengths.ContainsKey(charset))
|
|
return 1;
|
|
return maxLengths[charset];
|
|
}
|
|
}
|
|
|
|
internal class CharacterSet
|
|
{
|
|
public string name;
|
|
public int byteCount;
|
|
|
|
public CharacterSet(string name, int byteCount)
|
|
{
|
|
this.name = name;
|
|
this.byteCount = byteCount;
|
|
}
|
|
}
|
|
} |