source: branches/CodeEditor/HeuristicLab.ExtLibs/HeuristicLab.Cecil/0.9.5/Mono.Cecil-0.9.5/Mono.Cecil/Mono.Cecil/FieldDefinition.cs @ 11700

//
// FieldDefinition.cs
//
// Author:
//   Jb Evain (jbevain@gmail.com)
//
// Copyright (c) 2008 - 2011 Jb Evain
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//

using Mono.Collections.Generic;

namespace Mono.Cecil {

  public sealed class FieldDefinition : FieldReference, IMemberDefinition, IConstantProvider, IMarshalInfoProvider {

    ushort attributes;
    Collection<CustomAttribute> custom_attributes;

    int offset = Mixin.NotResolvedMarker;

    internal int rva = Mixin.NotResolvedMarker;
    byte [] initial_value;

    object constant = Mixin.NotResolved;

    MarshalInfo marshal_info;

    void ResolveLayout ()
    {
      if (offset != Mixin.NotResolvedMarker)
        return;

      if (!HasImage) {
        offset = Mixin.NoDataMarker;
        return;
      }

      offset = Module.Read (this, (field, reader) => reader.ReadFieldLayout (field));
    }

    public bool HasLayoutInfo {
      get {
        if (offset >= 0)
          return true;

        ResolveLayout ();

        return offset >= 0;
      }
    }

    public int Offset {
      get {
        if (offset >= 0)
          return offset;

        ResolveLayout ();

        return offset >= 0 ? offset : -1;
      }
      set { offset = value; }
    }

    void ResolveRVA ()
    {
      if (rva != Mixin.NotResolvedMarker)
        return;

      if (!HasImage)
        return;

      rva = Module.Read (this, (field, reader) => reader.ReadFieldRVA (field));
    }

    public int RVA {
      get {
        if (rva > 0)
          return rva;

        ResolveRVA ();

        return rva > 0 ? rva : 0;
      }
    }

    public byte [] InitialValue {
      get {
        if (initial_value != null)
          return initial_value;

        ResolveRVA ();

        if (initial_value == null)
          initial_value = Empty<byte>.Array;

        return initial_value;
      }
      set { initial_value = value; }
    }

    public FieldAttributes Attributes {
      get { return (FieldAttributes) attributes; }
      set { attributes = (ushort) value; }
    }

    public bool HasConstant {
      get {
        ResolveConstant ();

        return constant != Mixin.NoValue;
      }
      set { if (!value) constant = Mixin.NoValue; }
    }

    public object Constant {
      get { return HasConstant ? constant : null; }
      set { constant = value; }
    }

    void ResolveConstant ()
    {
      if (constant != Mixin.NotResolved)
        return;

      this.ResolveConstant (ref constant, Module);
    }

    public bool HasCustomAttributes {
      get {
        if (custom_attributes != null)
          return custom_attributes.Count > 0;

        return this.GetHasCustomAttributes (Module);
      }
    }

    public Collection<CustomAttribute> CustomAttributes {
      get { return custom_attributes ?? (custom_attributes = this.GetCustomAttributes (Module)); }
    }

    public bool HasMarshalInfo {
      get {
        if (marshal_info != null)
          return true;

        return this.GetHasMarshalInfo (Module);
      }
    }

    public MarshalInfo MarshalInfo {
      get { return marshal_info ?? (marshal_info = this.GetMarshalInfo (Module)); }
      set { marshal_info = value; }
    }

    #region FieldAttributes

    public bool IsCompilerControlled {
      get { return attributes.GetMaskedAttributes ((ushort) FieldAttributes.FieldAccessMask, (ushort) FieldAttributes.CompilerControlled); }
      set { attributes = attributes.SetMaskedAttributes ((ushort) FieldAttributes.FieldAccessMask, (ushort) FieldAttributes.CompilerControlled, value); }
    }

    public bool IsPrivate {
      get { return attributes.GetMaskedAttributes ((ushort) FieldAttributes.FieldAccessMask, (ushort) FieldAttributes.Private); }
      set { attributes = attributes.SetMaskedAttributes ((ushort) FieldAttributes.FieldAccessMask, (ushort) FieldAttributes.Private, value); }
    }

    public bool IsFamilyAndAssembly {
      get { return attributes.GetMaskedAttributes ((ushort) FieldAttributes.FieldAccessMask, (ushort) FieldAttributes.FamANDAssem); }
      set { attributes = attributes.SetMaskedAttributes ((ushort) FieldAttributes.FieldAccessMask, (ushort) FieldAttributes.FamANDAssem, value); }
    }

    public bool IsAssembly {
      get { return attributes.GetMaskedAttributes ((ushort) FieldAttributes.FieldAccessMask, (ushort) FieldAttributes.Assembly); }
      set { attributes = attributes.SetMaskedAttributes ((ushort) FieldAttributes.FieldAccessMask, (ushort) FieldAttributes.Assembly, value); }
    }

    public bool IsFamily {
      get { return attributes.GetMaskedAttributes ((ushort) FieldAttributes.FieldAccessMask, (ushort) FieldAttributes.Family); }
      set { attributes = attributes.SetMaskedAttributes ((ushort) FieldAttributes.FieldAccessMask, (ushort) FieldAttributes.Family, value); }
    }

    public bool IsFamilyOrAssembly {
      get { return attributes.GetMaskedAttributes ((ushort) FieldAttributes.FieldAccessMask, (ushort) FieldAttributes.FamORAssem); }
      set { attributes = attributes.SetMaskedAttributes ((ushort) FieldAttributes.FieldAccessMask, (ushort) FieldAttributes.FamORAssem, value); }
    }

    public bool IsPublic {
      get { return attributes.GetMaskedAttributes ((ushort) FieldAttributes.FieldAccessMask, (ushort) FieldAttributes.Public); }
      set { attributes = attributes.SetMaskedAttributes ((ushort) FieldAttributes.FieldAccessMask, (ushort) FieldAttributes.Public, value); }
    }

    public bool IsStatic {
      get { return attributes.GetAttributes ((ushort) FieldAttributes.Static); }
      set { attributes = attributes.SetAttributes ((ushort) FieldAttributes.Static, value); }
    }

    public bool IsInitOnly {
      get { return attributes.GetAttributes ((ushort) FieldAttributes.InitOnly); }
      set { attributes = attributes.SetAttributes ((ushort) FieldAttributes.InitOnly, value); }
    }

    public bool IsLiteral {
      get { return attributes.GetAttributes ((ushort) FieldAttributes.Literal); }
      set { attributes = attributes.SetAttributes ((ushort) FieldAttributes.Literal, value); }
    }

    public bool IsNotSerialized {
      get { return attributes.GetAttributes ((ushort) FieldAttributes.NotSerialized); }
      set { attributes = attributes.SetAttributes ((ushort) FieldAttributes.NotSerialized, value); }
    }

    public bool IsSpecialName {
      get { return attributes.GetAttributes ((ushort) FieldAttributes.SpecialName); }
      set { attributes = attributes.SetAttributes ((ushort) FieldAttributes.SpecialName, value); }
    }

    public bool IsPInvokeImpl {
      get { return attributes.GetAttributes ((ushort) FieldAttributes.PInvokeImpl); }
      set { attributes = attributes.SetAttributes ((ushort) FieldAttributes.PInvokeImpl, value); }
    }

    public bool IsRuntimeSpecialName {
      get { return attributes.GetAttributes ((ushort) FieldAttributes.RTSpecialName); }
      set { attributes = attributes.SetAttributes ((ushort) FieldAttributes.RTSpecialName, value); }
    }

    public bool HasDefault {
      get { return attributes.GetAttributes ((ushort) FieldAttributes.HasDefault); }
      set { attributes = attributes.SetAttributes ((ushort) FieldAttributes.HasDefault, value); }
    }

    #endregion

    public override bool IsDefinition {
      get { return true; }
    }

    public new TypeDefinition DeclaringType {
      get { return (TypeDefinition) base.DeclaringType; }
      set { base.DeclaringType = value; }
    }

    public FieldDefinition (string name, FieldAttributes attributes, TypeReference fieldType)
      : base (name, fieldType)
    {
      this.attributes = (ushort) attributes;
    }

    public override FieldDefinition Resolve ()
    {
      return this;
    }
  }

  static partial class Mixin {

    public const int NotResolvedMarker = -2;
    public const int NoDataMarker = -1;
  }
}