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

   1
   2 //
   3 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
   4 //
   5 // Permission is hereby granted, free of charge, to any person obtaining
   6 // a copy of this software and associated documentation files (the
   7 // "Software"), to deal in the Software without restriction, including
   8 // without limitation the rights to use, copy, modify, merge, publish,
   9 // distribute, sublicense, and/or sell copies of the Software, and to
  10 // permit persons to whom the Software is furnished to do so, subject to
  11 // the following conditions:
  12 //
  13 // The above copyright notice and this permission notice shall be
  14 // included in all copies or substantial portions of the Software.
  15 //
  16 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  17 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  18 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  19 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  20 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  21 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  22 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23 //
  24
  25 //
  26 // System.Reflection.Emit/FieldBuilder.cs
  27 //
  28 // Author:
  29 //   Paolo Molaro (lupus@ximian.com)
  30 //
  31 // (C) 2001-2002 Ximian, Inc.  http://www.ximian.com
  32 //
  33
  34 #if MONO_FEATURE_SRE
  35 using System;
  36 using System.Reflection;
  37 using System.Reflection.Emit;
  38 using System.Globalization;
  39 using System.Runtime.CompilerServices;
  40 using System.Runtime.InteropServices;
  41
  42 namespace System.Reflection.Emit {
  43
  44 #if !MOBILE
  45         [ComVisible (true)]
  46         [ComDefaultInterface (typeof (_FieldBuilder))]
  47         [ClassInterface (ClassInterfaceType.None)]
  48         partial class FieldBuilder : _FieldBuilder
  49         {
  50                 void _FieldBuilder.GetIDsOfNames ([In] ref Guid riid, IntPtr rgszNames, uint cNames, uint lcid, IntPtr rgDispId)
  51                 {
  52                         throw new NotImplementedException ();
  53                 }
  54
  55                 void _FieldBuilder.GetTypeInfo (uint iTInfo, uint lcid, IntPtr ppTInfo)
  56                 {
  57                         throw new NotImplementedException ();
  58                 }
  59
  60                 void _FieldBuilder.GetTypeInfoCount (out uint pcTInfo)
  61                 {
  62                         throw new NotImplementedException ();
  63                 }
  64
  65                 void _FieldBuilder.Invoke (uint dispIdMember, [In] ref Guid riid, uint lcid, short wFlags, IntPtr pDispParams, IntPtr pVarResult, IntPtr pExcepInfo, IntPtr puArgErr)
  66                 {
  67                         throw new NotImplementedException ();
  68                 }
  69         }
  70 #endif
  71
  72         [StructLayout (LayoutKind.Sequential)]
  73         public sealed partial class FieldBuilder : FieldInfo {
  74
  75 #pragma warning disable 169, 414
  76                 private FieldAttributes attrs;
  77                 private Type type;
  78                 private String name;
  79                 private object def_value;
  80                 private int offset;
  81                 internal TypeBuilder typeb;
  82                 private byte[] rva_data;
  83                 private CustomAttributeBuilder[] cattrs;
  84                 private UnmanagedMarshal marshal_info;
  85                 private RuntimeFieldHandle handle;
  86                 private Type[] modReq;
  87                 private Type[] modOpt;
  88 #pragma warning restore 169, 414
  89
  90                 internal FieldBuilder (TypeBuilder tb, string fieldName, Type type, FieldAttributes attributes, Type[] modReq, Type[] modOpt)
  91                 {
  92                         if (type == null)
  93                                 throw new ArgumentNullException ("type");
  94
  95                         attrs = attributes;
  96                         name = fieldName;
  97                         this.type = type;
  98                         this.modReq = modReq;
  99                         this.modOpt = modOpt;
 100                         offset = -1;
 101                         typeb = tb;
 102
 103                         ((ModuleBuilder) tb.Module).RegisterToken (this, GetToken ().Token);
 104                 }
 105
 106                 public override FieldAttributes Attributes {
 107                         get { return attrs; }
 108                 }
 109
 110                 public override Type DeclaringType {
 111                         get { return typeb; }
 112                 }
 113
 114                 public override RuntimeFieldHandle FieldHandle {
 115                         get {
 116                                 throw CreateNotSupportedException ();
 117                         }
 118                 }
 119
 120                 public override Type FieldType {
 121                         get { return type; }
 122                 }
 123
 124                 public override string Name {
 125                         get { return name; }
 126                 }
 127
 128                 public override Type ReflectedType {
 129                         get { return typeb; }
 130                 }
 131
 132                 public override object[] GetCustomAttributes(bool inherit) {
 133                         /*
 134                          * On MS.NET, this always returns not_supported, but we can't do this
 135                          * since there would be no way to obtain custom attributes of
 136                          * dynamically created ctors.
 137                          */
 138                         if (typeb.is_created)
 139                                 return MonoCustomAttrs.GetCustomAttributes (this, inherit);
 140                         else
 141                                 throw CreateNotSupportedException ();
 142                 }
 143
 144                 public override object[] GetCustomAttributes(Type attributeType, bool inherit) {
 145                         if (typeb.is_created)
 146                                 return MonoCustomAttrs.GetCustomAttributes (this, attributeType, inherit);
 147                         else
 148                                 throw CreateNotSupportedException ();
 149                 }
 150
 151                 public override int MetadataToken { get { return ((ModuleBuilder) typeb.Module).GetToken (this); } }
 152
 153                 public FieldToken GetToken() {
 154                         return new FieldToken (MetadataToken);
 155                 }
 156
 157                 public override object GetValue(object obj) {
 158                         throw CreateNotSupportedException ();
 159                 }
 160
 161                 public override bool IsDefined( Type attributeType, bool inherit) {
 162                         throw CreateNotSupportedException ();
 163                 }
 164
 165                 internal override int GetFieldOffset () {
 166                         /* FIXME: */
 167                         return 0;
 168                 }
 169
 170                 internal void SetRVAData (byte[] data) {
 171                         rva_data = (byte[])data.Clone ();
 172                 }
 173
 174                 public void SetConstant( object defaultValue) {
 175                         RejectIfCreated ();
 176
 177                         /*if (defaultValue.GetType() != type)
 178                                 throw new ArgumentException ("Constant doesn't match field type");*/
 179                         def_value = defaultValue;
 180                 }
 181
 182                 public void SetCustomAttribute (CustomAttributeBuilder customBuilder) {
 183                         RejectIfCreated ();
 184
 185                         if (customBuilder == null)
 186                                 throw new ArgumentNullException ("customBuilder");
 187
 188                         string attrname = customBuilder.Ctor.ReflectedType.FullName;
 189                         if (attrname == "System.Runtime.InteropServices.FieldOffsetAttribute") {
 190                                 byte[] data = customBuilder.Data;
 191                                 offset = (int)data [2];
 192                                 offset |= ((int)data [3]) << 8;
 193                                 offset |= ((int)data [4]) << 16;
 194                                 offset |= ((int)data [5]) << 24;
 195                                 return;
 196                         } else if (attrname == "System.NonSerializedAttribute") {
 197                                 attrs |= FieldAttributes.NotSerialized;
 198                                 return;
 199                         } else if (attrname == "System.Runtime.CompilerServices.SpecialNameAttribute") {
 200                                 attrs |= FieldAttributes.SpecialName;
 201                                 return;
 202                         } else if (attrname == "System.Runtime.InteropServices.MarshalAsAttribute") {
 203                                 attrs |= FieldAttributes.HasFieldMarshal;
 204                                 marshal_info = CustomAttributeBuilder.get_umarshal (customBuilder, true);
 205                                 /* FIXME: check for errors */
 206                                 return;
 207                         }
 208                         if (cattrs != null) {
 209                                 CustomAttributeBuilder[] new_array = new CustomAttributeBuilder [cattrs.Length + 1];
 210                                 cattrs.CopyTo (new_array, 0);
 211                                 new_array [cattrs.Length] = customBuilder;
 212                                 cattrs = new_array;
 213                         } else {
 214                                 cattrs = new CustomAttributeBuilder [1];
 215                                 cattrs [0] = customBuilder;
 216                         }
 217                 }
 218
 219                 [ComVisible (true)]
 220                 public void SetCustomAttribute( ConstructorInfo con, byte[] binaryAttribute) {
 221                         RejectIfCreated ();
 222                         SetCustomAttribute (new CustomAttributeBuilder (con, binaryAttribute));
 223                 }
 224
 225                 [Obsolete ("An alternate API is available: Emit the MarshalAs custom attribute instead.")]
 226                 public void SetMarshal( UnmanagedMarshal unmanagedMarshal) {
 227                         RejectIfCreated ();
 228                         marshal_info = unmanagedMarshal;
 229                         attrs |= FieldAttributes.HasFieldMarshal;
 230                 }
 231
 232                 public void SetOffset( int iOffset) {
 233                         RejectIfCreated ();
 234                         if (iOffset < 0)
 235                                 throw new ArgumentException ("Negative field offset is not allowed");
 236                         offset = iOffset;
 237                 }
 238
 239                 public override void SetValue( object obj, object val, BindingFlags invokeAttr, Binder binder, CultureInfo culture) {
 240                         throw CreateNotSupportedException ();
 241                 }
 242
 243                 private Exception CreateNotSupportedException ()
 244                 {
 245                         return new NotSupportedException ("The invoked member is not supported in a dynamic module.");
 246                 }
 247
 248                 private void RejectIfCreated ()
 249                 {
 250                         if (typeb.is_created)
 251                                 throw new InvalidOperationException ("Unable to change after type has been created.");
 252                 }
 253
 254                 internal void ResolveUserTypes () {
 255                         type = TypeBuilder.ResolveUserType (type);
 256                         TypeBuilder.ResolveUserTypes (modReq);
 257                         TypeBuilder.ResolveUserTypes (modOpt);
 258                         if (marshal_info != null)
 259                                 marshal_info.marshaltyperef = TypeBuilder.ResolveUserType (marshal_info.marshaltyperef);
 260                 }
 261
 262                 internal FieldInfo RuntimeResolve () {
 263                         // typeb.CreateType() populates this.handle
 264                         var type_handle = new RuntimeTypeHandle (typeb.CreateType () as RuntimeType);
 265                         return FieldInfo.GetFieldFromHandle (handle, type_handle);
 266                 }
 267
 268                 public override Module Module {
 269                         get {
 270                                 return base.Module;
 271                         }
 272                 }
 273         }
 274 }
 275
 276 #endif