class/corlib/System.Globalization/SortKey.cs

   1 //
   2 // System.Globalization.SortKey.cs
   3 //
   4 // Author:
   5 //      Dick Porter (dick@ximian.com)
   6 //
   7 // (C) 2002 Ximian, Inc.
   8 //
   9
  10 //
  11 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  12 //
  13 // Permission is hereby granted, free of charge, to any person obtaining
  14 // a copy of this software and associated documentation files (the
  15 // "Software"), to deal in the Software without restriction, including
  16 // without limitation the rights to use, copy, modify, merge, publish,
  17 // distribute, sublicense, and/or sell copies of the Software, and to
  18 // permit persons to whom the Software is furnished to do so, subject to
  19 // the following conditions:
  20 //
  21 // The above copyright notice and this permission notice shall be
  22 // included in all copies or substantial portions of the Software.
  23 //
  24 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  28 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  29 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  30 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  31 //
  32
  33 namespace System.Globalization {
  34
  35         [System.Runtime.InteropServices.ComVisible(true)]
  36         [Serializable]
  37         public class SortKey {
  38                 private string str;
  39                 private CompareOptions options;
  40                 private byte[] key;
  41                 private int lcid;
  42
  43                 /* Hide the .ctor() */
  44                 SortKey () {}
  45
  46                 internal SortKey (int lcid, string source, CompareOptions options)
  47                 {
  48                         this.lcid = lcid;
  49                         str = source;
  50                         this.options = options;
  51                 }
  52
  53                 public virtual byte[] KeyData
  54                 {
  55                         get {
  56                                 return key;
  57                         }
  58                 }
  59
  60                 public virtual string OriginalString
  61                 {
  62                         get {
  63                                 return str;
  64                         }
  65                 }
  66
  67                 public static int Compare (SortKey sortkey1, SortKey sortkey2)
  68                 {
  69                         if (sortkey1 == null) {
  70                                 throw new ArgumentNullException ("sortkey1");
  71                         }
  72                         if (sortkey2 == null) {
  73                                 throw new ArgumentNullException ("sortkey2");
  74                         }
  75
  76                         byte[] keydata1 = sortkey1.key;
  77                         byte[] keydata2 = sortkey2.key;
  78
  79                         if (keydata1.Length == 0) {
  80                                 if (keydata2.Length == 0) {
  81                                         return 0;
  82                                 }
  83                                 return -1;
  84                         }
  85
  86                         int min_len = (keydata1.Length < keydata2.Length) ? keydata1.Length : keydata2.Length;
  87
  88                         for (int i = 0; i < min_len; i++) {
  89                                 if (keydata1[i] > keydata2[i]) {
  90                                         return 1;
  91                                 } else if (keydata1[i] < keydata2[i]) {
  92                                         return -1;
  93                                 }
  94                         }
  95
  96                         if (keydata1.Length < keydata2.Length) {
  97                                 return -1;
  98                         } else if (keydata1.Length > keydata2.Length) {
  99                                 return 1;
 100                         } else {
 101                                 return 0;
 102                         }
 103                 }
 104
 105                 public override bool Equals (object value)
 106                 {
 107                         SortKey other = (value as SortKey);
 108                         if (other != null) {
 109                                 if ((this.lcid == other.lcid) &&
 110                                    (this.options == other.options) &&
 111                                    (Compare (this, other) == 0)) {
 112                                         return true;
 113                                 }
 114                         }
 115
 116                         return false;
 117                 }
 118
 119                 public override int GetHashCode ()
 120                 {
 121                         return str.GetHashCode ();
 122                 }
 123
 124                 public override string ToString ()
 125                 {
 126                         return ("SortKey - " + lcid + ", " + options + ", " + str);
 127                 }
 128         }
 129 }