mcs/class/FirebirdSql.Data.Firebird/FirebirdSql.Data.Common/Charset.cs

   1 /*
   2  *  Firebird ADO.NET Data provider for .NET and Mono
   3  *
   4  *     The contents of this file are subject to the Initial
   5  *     Developer's Public License Version 1.0 (the "License");
   6  *     you may not use this file except in compliance with the
   7  *     License. You may obtain a copy of the License at
   8  *     http://www.firebirdsql.org/index.php?op=doc&id=idpl
   9  *
  10  *     Software distributed under the License is distributed on
  11  *     an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either
  12  *     express or implied.  See the License for the specific
  13  *     language governing rights and limitations under the License.
  14  *
  15  *  Copyright (c) 2002, 2005 Carlos Guzman Alvarez
  16  *  All Rights Reserved.
  17  */
  18
  19 using System;
  20 using System.Text;
  21
  22 namespace FirebirdSql.Data.Common
  23 {
  24         internal sealed class Charset
  25         {
  26                 #region Static Fields
  27
  28                 private readonly static CharsetCollection supportedCharsets = Charset.InitializeSupportedCharsets();
  29
  30                 #endregion
  31
  32                 #region Static Properties
  33
  34                 public static CharsetCollection SupportedCharsets
  35                 {
  36                         get { return Charset.supportedCharsets; }
  37                 }
  38
  39                 public static Charset DefaultCharset
  40                 {
  41                         get { return Charset.SupportedCharsets[0]; }
  42                 }
  43
  44                 #endregion
  45
  46                 #region Fields
  47
  48                 private int             id;
  49                 private int             bytesPerCharacter;
  50                 private string  name;
  51                 private string  systemName;
  52
  53                 #endregion
  54
  55                 #region Properties
  56
  57                 public int ID
  58                 {
  59                         get { return this.id; }
  60                 }
  61
  62                 public string Name
  63                 {
  64                         get { return this.name; }
  65                 }
  66
  67                 public int BytesPerCharacter
  68                 {
  69                         get { return this.bytesPerCharacter; }
  70                 }
  71
  72                 #endregion
  73
  74                 #region Constructors
  75
  76                 public Charset(
  77                         int id, string name, int bytesPerCharacter, string systemName)
  78                 {
  79                         this.id                                 = id;
  80                         this.name                               = name;
  81                         this.bytesPerCharacter  = bytesPerCharacter;
  82                         this.systemName                 = systemName;
  83                 }
  84
  85                 #endregion
  86
  87                 #region Methods
  88
  89                 public byte[] GetBytes(string s)
  90                 {
  91                         return this.GetEncoding().GetBytes(s);
  92                 }
  93
  94                 public int GetBytes(string s, int charIndex, int charCount, byte[] bytes, int byteIndex)
  95                 {
  96                         return this.GetEncoding().GetBytes(s, charIndex, charCount, bytes, byteIndex);
  97                 }
  98
  99                 public string GetString(byte[] buffer)
 100                 {
 101                         return this.GetString(buffer, 0, buffer.Length);
 102                 }
 103
 104                 public string GetString(byte[] buffer, int index, int count)
 105                 {
 106                         return this.GetEncoding().GetString(buffer, index, count);
 107                 }
 108
 109                 #endregion
 110
 111                 #region Private Methods
 112
 113                 private Encoding GetEncoding()
 114                 {
 115                         switch (this.systemName)
 116                         {
 117                                 case "NONE":
 118                                         return Encoding.Default;
 119
 120                                 case "OCTETS":
 121                                         return new BinaryEncoding();
 122
 123                                 default:
 124                                         return Encoding.GetEncoding(this.systemName);
 125                         }
 126                 }
 127
 128                 #endregion
 129
 130                 #region Static Methods
 131
 132                 public static CharsetCollection InitializeSupportedCharsets()
 133                 {
 134                         CharsetCollection charsets = new CharsetCollection();
 135
 136                         // NONE
 137                         Charset.Add(charsets, 0, "NONE", 1, "NONE");
 138                         // OCTETS
 139                         Charset.Add(charsets, 1, "OCTETS", 1, "OCTETS");
 140                         // American Standard Code for Information Interchange
 141                         Charset.Add(charsets, 2, "ASCII", 1, "ascii");
 142                         // Eight-bit Unicode Transformation Format
 143                         Charset.Add(charsets, 3, "UNICODE_FSS", 3, "UTF-8");
 144                         // Shift-JIS, Japanese
 145                         Charset.Add(charsets, 5, "SJIS_0208", 2, "shift_jis");
 146                         // JIS X 0201, 0208, 0212, EUC encoding, Japanese
 147                         Charset.Add(charsets, 6, "EUCJ_0208", 2, "euc-jp");
 148                         // Windows Japanese
 149                         Charset.Add(charsets, 7, "ISO2022-JP", 2, "iso-2022-jp");
 150                         // MS-DOS United States, Australia, New Zealand, South Africa
 151                         Charset.Add(charsets, 10, "DOS437", 1, "IBM437");
 152                         // MS-DOS Latin-1
 153                         Charset.Add(charsets, 11, "DOS850", 1, "ibm850");
 154                         // MS-DOS Nordic
 155                         Charset.Add(charsets, 12, "DOS865", 1, "IBM865");
 156                         // MS-DOS Portuguese
 157                         Charset.Add(charsets, 13, "DOS860", 1, "IBM860");
 158                         // MS-DOS Canadian French
 159                         Charset.Add(charsets, 14, "DOS863", 1, "IBM863");
 160                         // ISO 8859-1, Latin alphabet No. 1
 161                         Charset.Add(charsets, 21, "ISO8859_1", 1, "iso-8859-1");
 162                         // ISO 8859-2, Latin alphabet No. 2
 163                         Charset.Add(charsets, 22, "ISO8859_2", 1, "iso-8859-2");
 164                         // Windows Korean
 165                         Charset.Add(charsets, 44, "KSC_5601", 2, "ks_c_5601-1987");
 166                         // MS-DOS Icelandic
 167                         Charset.Add(charsets, 47, "DOS861", 1, "ibm861");
 168                         // Windows Eastern European
 169                         Charset.Add(charsets, 51, "WIN1250", 1, "windows-1250");
 170                         // Windows Cyrillic
 171                         Charset.Add(charsets, 52, "WIN1251", 1, "windows-1251");
 172                         // Windows Latin-1
 173                         Charset.Add(charsets, 53, "WIN1252", 1, "windows-1252");
 174                         // Windows Greek
 175                         Charset.Add(charsets, 54, "WIN1253", 1, "windows-1253");
 176                         // Windows Turkish
 177                         Charset.Add(charsets, 55, "WIN1254", 1, "windows-1254");
 178                         // Big5, Traditional Chinese
 179                         Charset.Add(charsets, 56, "BIG_5", 2, "big5");
 180                         // GB2312, EUC encoding, Simplified Chinese
 181                         Charset.Add(charsets, 57, "GB_2312", 2, "gb2312");
 182                         // Windows Hebrew
 183                         Charset.Add(charsets, 58, "WIN1255", 1, "windows-1255");
 184                         // Windows Arabic
 185                         Charset.Add(charsets, 59, "WIN1256", 1, "windows-1256");
 186                         // Windows Baltic
 187                         Charset.Add(charsets, 60, "WIN1257", 1, "windows-1257");
 188
 189             return charsets;
 190                 }
 191
 192                 private static void Add(
 193                         CharsetCollection charsets, int id, string charset, int bytesPerCharacter, string systemName)
 194                 {
 195                         charsets.Add(
 196                                         id,
 197                                         charset,
 198                                         bytesPerCharacter,
 199                                         systemName);
 200                 }
 201
 202                 #endregion
 203         }
 204 }