mcs/class/corlib/System.Reflection.Emit/FieldBuilder.cs

   1
   2 //
   3 // System.Reflection.Emit/FieldBuilder.cs
   4 //
   5 // Author:
   6 //   Paolo Molaro (lupus@ximian.com)
   7 //
   8 // (C) 2001-2002 Ximian, Inc.  http://www.ximian.com
   9 //
  10
  11 using System;
  12 using System.Reflection;
  13 using System.Reflection.Emit;
  14 using System.Globalization;
  15 using System.Runtime.CompilerServices;
  16 using System.Runtime.InteropServices;
  17
  18 namespace System.Reflection.Emit {
  19         public sealed class FieldBuilder : FieldInfo {
  20                 private FieldAttributes attrs;
  21                 private Type type;
  22                 private String name;
  23                 private object def_value;
  24                 private int offset;
  25                 private int table_idx;
  26                 internal TypeBuilder typeb;
  27                 private byte[] rva_data;
  28                 private CustomAttributeBuilder[] cattrs;
  29                 private UnmanagedMarshal marshal_info;
  30
  31                 internal FieldBuilder (TypeBuilder tb, string fieldName, Type type, FieldAttributes attributes) {
  32                         attrs = attributes;
  33                         name = fieldName;
  34                         this.type = type;
  35                         offset = -1;
  36                         typeb = tb;
  37                         table_idx = tb.get_next_table_index (this, 0x04, true);
  38                 }
  39
  40                 public override FieldAttributes Attributes {
  41                         get {return attrs;}
  42                 }
  43                 public override Type DeclaringType {
  44                         get {return typeb;}
  45                 }
  46                 public override RuntimeFieldHandle FieldHandle {
  47                         get {return new RuntimeFieldHandle();}
  48                 }
  49                 public override Type FieldType {
  50                         get {return type;}
  51                 }
  52                 public override string Name {
  53                         get {return name;}
  54                 }
  55                 public override Type ReflectedType {
  56                         get {return typeb;}
  57                 }
  58
  59                 public override object[] GetCustomAttributes(bool inherit) {
  60                         return null;
  61                 }
  62                 public override object[] GetCustomAttributes(Type attributeType, bool inherit) {
  63                         return null;
  64                 }
  65                 public FieldToken GetToken() {
  66                         return new FieldToken (0x04000000 | table_idx);
  67                 }
  68                 public override object GetValue(object obj) {
  69                         return null;
  70                 }
  71                 public override bool IsDefined( Type attributeType, bool inherit) {
  72                         return false;
  73                 }
  74                 internal void SetRVAData (byte[] data) {
  75                         rva_data = (byte[])data.Clone ();
  76                 }
  77                 public void SetConstant( object defaultValue) {
  78                         /*if (defaultValue.GetType() != type)
  79                                 throw new ArgumentException ("Constant doesn't match field type");*/
  80                         def_value = defaultValue;
  81                 }
  82
  83                 public void SetCustomAttribute( CustomAttributeBuilder customBuilder) {
  84                         string attrname = customBuilder.Ctor.ReflectedType.FullName;
  85                         if (attrname == "System.Runtime.InteropServices.FieldOffsetAttribute") {
  86                                 byte[] data = customBuilder.Data;
  87                                 offset = (int)data [2];
  88                                 offset |= ((int)data [3]) << 8;
  89                                 offset |= ((int)data [4]) << 16;
  90                                 offset |= ((int)data [5]) << 24;
  91                                 return;
  92                         } else if (attrname == "System.NonSerializedAttribute") {
  93                                 attrs |= FieldAttributes.NotSerialized;
  94                                 return;
  95                         } else if (attrname == "System.Runtime.InteropServices.MarshalAsAttribute") {
  96                                 marshal_info = CustomAttributeBuilder.get_umarshal (customBuilder, true);
  97                                 /* FIXME: check for errors */
  98                                 return;
  99                         }
 100                         if (cattrs != null) {
 101                                 CustomAttributeBuilder[] new_array = new CustomAttributeBuilder [cattrs.Length + 1];
 102                                 cattrs.CopyTo (new_array, 0);
 103                                 new_array [cattrs.Length] = customBuilder;
 104                                 cattrs = new_array;
 105                         } else {
 106                                 cattrs = new CustomAttributeBuilder [1];
 107                                 cattrs [0] = customBuilder;
 108                         }
 109                 }
 110
 111                 public void SetCustomAttribute( ConstructorInfo con, byte[] binaryAttribute) {
 112                         SetCustomAttribute (new CustomAttributeBuilder (con, binaryAttribute));
 113                 }
 114
 115                 public void SetMarshal( UnmanagedMarshal unmanagedMarshal) {
 116                         marshal_info = unmanagedMarshal;
 117                         attrs |= FieldAttributes.HasFieldMarshal;
 118                 }
 119
 120                 public void SetOffset( int iOffset) {
 121                         offset = iOffset;
 122                 }
 123                 public override void SetValue( object obj, object val, BindingFlags invokeAttr, Binder binder, CultureInfo culture) {
 124                 }
 125
 126         }
 127 }
 128