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                 private RuntimeFieldHandle handle;
  31
  32                 internal FieldBuilder (TypeBuilder tb, string fieldName, Type type, FieldAttributes attributes) {
  33                         attrs = attributes;
  34                         name = fieldName;
  35                         this.type = type;
  36                         offset = -1;
  37                         typeb = tb;
  38                         table_idx = tb.get_next_table_index (this, 0x04, true);
  39                 }
  40
  41                 public override FieldAttributes Attributes {
  42                         get {return attrs;}
  43                 }
  44                 public override Type DeclaringType {
  45                         get {return typeb;}
  46                 }
  47                 public override RuntimeFieldHandle FieldHandle {
  48                         get {return new RuntimeFieldHandle();}
  49                 }
  50                 public override Type FieldType {
  51                         get {return type;}
  52                 }
  53                 public override string Name {
  54                         get {return name;}
  55                 }
  56                 public override Type ReflectedType {
  57                         get {return typeb;}
  58                 }
  59
  60                 public override object[] GetCustomAttributes(bool inherit) {
  61                         return null;
  62                 }
  63                 public override object[] GetCustomAttributes(Type attributeType, bool inherit) {
  64                         return null;
  65                 }
  66                 public FieldToken GetToken() {
  67                         return new FieldToken (0x04000000 | table_idx);
  68                 }
  69                 public override object GetValue(object obj) {
  70                         return null;
  71                 }
  72                 public override bool IsDefined( Type attributeType, bool inherit) {
  73                         return false;
  74                 }
  75                 internal void SetRVAData (byte[] data) {
  76                         rva_data = (byte[])data.Clone ();
  77                 }
  78                 public void SetConstant( object defaultValue) {
  79                         /*if (defaultValue.GetType() != type)
  80                                 throw new ArgumentException ("Constant doesn't match field type");*/
  81                         def_value = defaultValue;
  82                 }
  83
  84                 public void SetCustomAttribute( CustomAttributeBuilder customBuilder) {
  85                         string attrname = customBuilder.Ctor.ReflectedType.FullName;
  86                         if (attrname == "System.Runtime.InteropServices.FieldOffsetAttribute") {
  87                                 byte[] data = customBuilder.Data;
  88                                 offset = (int)data [2];
  89                                 offset |= ((int)data [3]) << 8;
  90                                 offset |= ((int)data [4]) << 16;
  91                                 offset |= ((int)data [5]) << 24;
  92                                 return;
  93                         } else if (attrname == "System.NonSerializedAttribute") {
  94                                 attrs |= FieldAttributes.NotSerialized;
  95                                 return;
  96                         } else if (attrname == "System.Runtime.InteropServices.MarshalAsAttribute") {
  97                                 attrs |= FieldAttributes.HasFieldMarshal;
  98                                 marshal_info = CustomAttributeBuilder.get_umarshal (customBuilder, true);
  99                                 /* FIXME: check for errors */
 100                                 return;
 101                         }
 102                         if (cattrs != null) {
 103                                 CustomAttributeBuilder[] new_array = new CustomAttributeBuilder [cattrs.Length + 1];
 104                                 cattrs.CopyTo (new_array, 0);
 105                                 new_array [cattrs.Length] = customBuilder;
 106                                 cattrs = new_array;
 107                         } else {
 108                                 cattrs = new CustomAttributeBuilder [1];
 109                                 cattrs [0] = customBuilder;
 110                         }
 111                 }
 112
 113                 public void SetCustomAttribute( ConstructorInfo con, byte[] binaryAttribute) {
 114                         SetCustomAttribute (new CustomAttributeBuilder (con, binaryAttribute));
 115                 }
 116
 117                 public void SetMarshal( UnmanagedMarshal unmanagedMarshal) {
 118                         marshal_info = unmanagedMarshal;
 119                         attrs |= FieldAttributes.HasFieldMarshal;
 120                 }
 121
 122                 public void SetOffset( int iOffset) {
 123                         offset = iOffset;
 124                 }
 125                 public override void SetValue( object obj, object val, BindingFlags invokeAttr, Binder binder, CultureInfo culture) {
 126                 }
 127
 128         }
 129 }
 130