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         [Serializable]
  36         public class SortKey {
  37                 private string str;
  38                 private CompareOptions options;
  39                 private byte[] key;
  40                 private int lcid;
  41
  42                 /* Hide the .ctor() */
  43                 SortKey() {}
  44
  45                 internal SortKey (int lcid, string source,
  46                                   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)?
  87                                 keydata1.Length:keydata2.Length;
  88
  89                         for(int i=0; i<min_len; i++) {
  90                                 if(keydata1[i] > keydata2[i]) {
  91                                         return(1);
  92                                 } else if(keydata1[i] < keydata2[i]) {
  93                                         return(-1);
  94                                 }
  95                         }
  96
  97                         if(keydata1.Length < keydata2.Length) {
  98                                 return(-1);
  99                         } else if (keydata1.Length > keydata2.Length) {
 100                                 return(1);
 101                         } else {
 102                                 return(0);
 103                         }
 104                 }
 105
 106                 public override bool Equals(object value)
 107                 {
 108                         SortKey other=(value as SortKey);
 109                         if(other!=null) {
 110                                 if((this.lcid==other.lcid) &&
 111                                    (this.options==other.options) &&
 112                                    (Compare (this, other)==0)) {
 113                                         return(true);
 114                                 }
 115                         }
 116
 117                         return(false);
 118                 }
 119
 120                 public override int GetHashCode()
 121                 {
 122                         return(str.GetHashCode ());
 123                 }
 124
 125                 public override string ToString()
 126                 {
 127                         return("SortKey - "+lcid+", "+options+", "+str);
 128                 }
 129         }
 130 }