mcs/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 #if NET_2_0
  36         [System.Runtime.InteropServices.ComVisible(true)]
  37 #endif
  38         [Serializable]
  39         public class SortKey {
  40                 private string str;
  41                 private CompareOptions options;
  42                 private byte[] key;
  43                 private int lcid;
  44
  45                 /* Hide the .ctor() */
  46                 SortKey() {}
  47
  48                 internal SortKey (int lcid, string source,
  49                                   CompareOptions options)
  50                 {
  51                         this.lcid=lcid;
  52                         str=source;
  53                         this.options=options;
  54                 }
  55
  56                 public virtual byte[] KeyData
  57                 {
  58                         get {
  59                                 return(key);
  60                         }
  61                 }
  62
  63                 public virtual string OriginalString
  64                 {
  65                         get {
  66                                 return(str);
  67                         }
  68                 }
  69
  70                 public static int Compare(SortKey sortkey1, SortKey sortkey2)
  71                 {
  72                         if(sortkey1==null) {
  73                                 throw new ArgumentNullException ("sortkey1");
  74                         }
  75                         if(sortkey2==null) {
  76                                 throw new ArgumentNullException ("sortkey2");
  77                         }
  78
  79                         byte[] keydata1=sortkey1.key;
  80                         byte[] keydata2=sortkey2.key;
  81
  82                         if(keydata1.Length==0) {
  83                                 if(keydata2.Length==0) {
  84                                         return(0);
  85                                 }
  86                                 return(-1);
  87                         }
  88
  89                         int min_len=(keydata1.Length < keydata2.Length)?
  90                                 keydata1.Length:keydata2.Length;
  91
  92                         for(int i=0; i<min_len; i++) {
  93                                 if(keydata1[i] > keydata2[i]) {
  94                                         return(1);
  95                                 } else if(keydata1[i] < keydata2[i]) {
  96                                         return(-1);
  97                                 }
  98                         }
  99
 100                         if(keydata1.Length < keydata2.Length) {
 101                                 return(-1);
 102                         } else if (keydata1.Length > keydata2.Length) {
 103                                 return(1);
 104                         } else {
 105                                 return(0);
 106                         }
 107                 }
 108
 109                 public override bool Equals(object value)
 110                 {
 111                         SortKey other=(value as SortKey);
 112                         if(other!=null) {
 113                                 if((this.lcid==other.lcid) &&
 114                                    (this.options==other.options) &&
 115                                    (Compare (this, other)==0)) {
 116                                         return(true);
 117                                 }
 118                         }
 119
 120                         return(false);
 121                 }
 122
 123                 public override int GetHashCode()
 124                 {
 125                         return(str.GetHashCode ());
 126                 }
 127
 128                 public override string ToString()
 129                 {
 130                         return("SortKey - "+lcid+", "+options+", "+str);
 131                 }
 132
 133         }
 134 }