class/Mono.Cecil/Mono.Cecil.Metadata/MetadataToken.cs

   1 //
   2 // MetadataToken.cs
   3 //
   4 // Author:
   5 //   Jb Evain (jbevain@gmail.com)
   6 //
   7 // (C) 2005 Jb Evain
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28
  29 namespace Mono.Cecil.Metadata {
  30
  31         public struct MetadataToken {
  32
  33                 uint m_rid;
  34                 TokenType m_type;
  35
  36                 public uint RID {
  37                         get { return m_rid; }
  38                 }
  39
  40                 public TokenType TokenType {
  41                         get { return m_type; }
  42                 }
  43
  44                 public static readonly MetadataToken Zero = new MetadataToken ((TokenType) 0, 0);
  45
  46                 public MetadataToken (int token)
  47                 {
  48                         m_type = (TokenType) (token & 0xff000000);
  49                         m_rid = (uint) token & 0x00ffffff;
  50                 }
  51
  52                 public MetadataToken (TokenType table, uint rid)
  53                 {
  54                         m_type = table;
  55                         m_rid = rid;
  56                 }
  57
  58                 internal static MetadataToken FromMetadataRow (TokenType table, int rowIndex)
  59                 {
  60                         return new MetadataToken (table, (uint) rowIndex + 1);
  61                 }
  62
  63                 public uint ToUInt ()
  64                 {
  65                         return (uint) m_type | m_rid;
  66                 }
  67
  68                 public override int GetHashCode ()
  69                 {
  70                         return (int) ToUInt ();
  71                 }
  72
  73                 public override bool Equals (object other)
  74                 {
  75                         if (other is MetadataToken)
  76                                 return Equals ((MetadataToken) other);
  77
  78                         return false;
  79                 }
  80
  81                 private bool Equals (MetadataToken other)
  82                 {
  83                         return other.m_rid == m_rid && other.m_type == m_type;
  84                 }
  85
  86                 public static bool operator == (MetadataToken one, MetadataToken other)
  87                 {
  88                         return one.Equals (other);
  89                 }
  90
  91                 public static bool operator != (MetadataToken one, MetadataToken other)
  92                 {
  93                         return !one.Equals (other);
  94                 }
  95
  96                 public override string ToString ()
  97                 {
  98                         return string.Format ("{0} [0x{1}]",
  99                                 m_type, m_rid.ToString ("x4"));
 100                 }
 101         }
 102 }