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                 private Type[] modReq;
  32                 private Type[] modOpt;
  33
  34                 internal FieldBuilder (TypeBuilder tb, string fieldName, Type type, FieldAttributes attributes, Type[] modReq, Type[] modOpt) {
  35                         attrs = attributes;
  36                         name = fieldName;
  37                         this.type = type;
  38                         this.modReq = modReq;
  39                         this.modOpt = modOpt;
  40                         offset = -1;
  41                         typeb = tb;
  42                         table_idx = tb.get_next_table_index (this, 0x04, true);
  43                 }
  44
  45                 public override FieldAttributes Attributes {
  46                         get {return attrs;}
  47                 }
  48                 public override Type DeclaringType {
  49                         get {return typeb;}
  50                 }
  51                 public override RuntimeFieldHandle FieldHandle {
  52                         get {return new RuntimeFieldHandle();}
  53                 }
  54                 public override Type FieldType {
  55                         get {return type;}
  56                 }
  57                 public override string Name {
  58                         get {return name;}
  59                 }
  60                 public override Type ReflectedType {
  61                         get {return typeb;}
  62                 }
  63
  64                 public override object[] GetCustomAttributes(bool inherit) {
  65                         return null;
  66                 }
  67                 public override object[] GetCustomAttributes(Type attributeType, bool inherit) {
  68                         return null;
  69                 }
  70                 public FieldToken GetToken() {
  71                         return new FieldToken (0x04000000 | table_idx);
  72                 }
  73                 public override object GetValue(object obj) {
  74                         return null;
  75                 }
  76                 public override bool IsDefined( Type attributeType, bool inherit) {
  77                         return false;
  78                 }
  79                 internal void SetRVAData (byte[] data) {
  80                         rva_data = (byte[])data.Clone ();
  81                 }
  82                 public void SetConstant( object defaultValue) {
  83                         /*if (defaultValue.GetType() != type)
  84                                 throw new ArgumentException ("Constant doesn't match field type");*/
  85                         def_value = defaultValue;
  86                 }
  87
  88                 public void SetCustomAttribute( CustomAttributeBuilder customBuilder) {
  89                         string attrname = customBuilder.Ctor.ReflectedType.FullName;
  90                         if (attrname == "System.Runtime.InteropServices.FieldOffsetAttribute") {
  91                                 byte[] data = customBuilder.Data;
  92                                 offset = (int)data [2];
  93                                 offset |= ((int)data [3]) << 8;
  94                                 offset |= ((int)data [4]) << 16;
  95                                 offset |= ((int)data [5]) << 24;
  96                                 return;
  97                         } else if (attrname == "System.NonSerializedAttribute") {
  98                                 attrs |= FieldAttributes.NotSerialized;
  99                                 return;
 100                         } else if (attrname == "System.Runtime.InteropServices.MarshalAsAttribute") {
 101                                 attrs |= FieldAttributes.HasFieldMarshal;
 102                                 marshal_info = CustomAttributeBuilder.get_umarshal (customBuilder, true);
 103                                 /* FIXME: check for errors */
 104                                 return;
 105                         }
 106                         if (cattrs != null) {
 107                                 CustomAttributeBuilder[] new_array = new CustomAttributeBuilder [cattrs.Length + 1];
 108                                 cattrs.CopyTo (new_array, 0);
 109                                 new_array [cattrs.Length] = customBuilder;
 110                                 cattrs = new_array;
 111                         } else {
 112                                 cattrs = new CustomAttributeBuilder [1];
 113                                 cattrs [0] = customBuilder;
 114                         }
 115                 }
 116
 117                 public void SetCustomAttribute( ConstructorInfo con, byte[] binaryAttribute) {
 118                         SetCustomAttribute (new CustomAttributeBuilder (con, binaryAttribute));
 119                 }
 120
 121                 public void SetMarshal( UnmanagedMarshal unmanagedMarshal) {
 122                         marshal_info = unmanagedMarshal;
 123                         attrs |= FieldAttributes.HasFieldMarshal;
 124                 }
 125
 126                 public void SetOffset( int iOffset) {
 127                         offset = iOffset;
 128                 }
 129                 public override void SetValue( object obj, object val, BindingFlags invokeAttr, Binder binder, CultureInfo culture) {
 130                 }
 131
 132         }
 133 }
 134