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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
//
using System;
using System.Globalization;
using System.Collections.Generic;
using System.Diagnostics;
using System.Diagnostics.Contracts;
namespace System.Reflection
{
[Flags()]
[System.Runtime.InteropServices.ComVisible(true)]
public enum ExceptionHandlingClauseOptions: int
{
Clause = 0x0,
Filter = 0x1,
Finally = 0x2,
Fault = 0x4,
}
[System.Runtime.InteropServices.ComVisible(true)]
public class ExceptionHandlingClause
{
#region costructor
// This class can only be created from inside the EE.
protected ExceptionHandlingClause() { }
#endregion
#region Private Data Members
private MethodBody m_methodBody;
[ContractPublicPropertyName("Flags")]
private ExceptionHandlingClauseOptions m_flags;
private int m_tryOffset;
private int m_tryLength;
private int m_handlerOffset;
private int m_handlerLength;
private int m_catchMetadataToken;
private int m_filterOffset;
#endregion
#region Public Members
public virtual ExceptionHandlingClauseOptions Flags { get { return m_flags; } }
public virtual int TryOffset { get { return m_tryOffset; } }
public virtual int TryLength { get { return m_tryLength; } }
public virtual int HandlerOffset { get { return m_handlerOffset; } }
public virtual int HandlerLength { get { return m_handlerLength; } }
public virtual int FilterOffset
{
get
{
if (m_flags != ExceptionHandlingClauseOptions.Filter)
throw new InvalidOperationException(Environment.GetResourceString("Arg_EHClauseNotFilter"));
return m_filterOffset;
}
}
public virtual Type CatchType
{
get
{
if (m_flags != ExceptionHandlingClauseOptions.Clause)
throw new InvalidOperationException(Environment.GetResourceString("Arg_EHClauseNotClause"));
Type type = null;
if (!MetadataToken.IsNullToken(m_catchMetadataToken))
{
Type declaringType = m_methodBody.m_methodBase.DeclaringType;
Module module = (declaringType == null) ? m_methodBody.m_methodBase.Module : declaringType.Module;
type = module.ResolveType(m_catchMetadataToken, (declaringType == null) ? null : declaringType.GetGenericArguments(),
m_methodBody.m_methodBase is MethodInfo ? m_methodBody.m_methodBase.GetGenericArguments() : null);
}
return type;
}
}
#endregion
#region Object Overrides
public override string ToString()
{
if (Flags == ExceptionHandlingClauseOptions.Clause)
{
return String.Format(CultureInfo.CurrentUICulture,
"Flags={0}, TryOffset={1}, TryLength={2}, HandlerOffset={3}, HandlerLength={4}, CatchType={5}",
Flags, TryOffset, TryLength, HandlerOffset, HandlerLength, CatchType);
}
if (Flags == ExceptionHandlingClauseOptions.Filter)
{
return String.Format(CultureInfo.CurrentUICulture,
"Flags={0}, TryOffset={1}, TryLength={2}, HandlerOffset={3}, HandlerLength={4}, FilterOffset={5}",
Flags, TryOffset, TryLength, HandlerOffset, HandlerLength, FilterOffset);
}
return String.Format(CultureInfo.CurrentUICulture,
"Flags={0}, TryOffset={1}, TryLength={2}, HandlerOffset={3}, HandlerLength={4}",
Flags, TryOffset, TryLength, HandlerOffset, HandlerLength);
}
#endregion
}
[System.Runtime.InteropServices.ComVisible(true)]
public class MethodBody
{
#region costructor
// This class can only be created from inside the EE.
protected MethodBody() { }
#endregion
#region Private Data Members
private byte[] m_IL;
private ExceptionHandlingClause[] m_exceptionHandlingClauses;
private LocalVariableInfo[] m_localVariables;
internal MethodBase m_methodBase;
private int m_localSignatureMetadataToken;
private int m_maxStackSize;
private bool m_initLocals;
#endregion
#region Public Members
public virtual int LocalSignatureMetadataToken { get { return m_localSignatureMetadataToken; } }
public virtual IList<LocalVariableInfo> LocalVariables { get { return Array.AsReadOnly(m_localVariables); } }
public virtual int MaxStackSize { get { return m_maxStackSize; } }
public virtual bool InitLocals { get { return m_initLocals; } }
public virtual byte[] GetILAsByteArray() { return m_IL; }
public virtual IList<ExceptionHandlingClause> ExceptionHandlingClauses { get { return Array.AsReadOnly(m_exceptionHandlingClauses); } }
#endregion
}
[System.Runtime.InteropServices.ComVisible(true)]
public class LocalVariableInfo
{
#region Private Data Members
private RuntimeType m_type;
private int m_isPinned;
private int m_localIndex;
#endregion
#region Constructor
protected LocalVariableInfo() { }
#endregion
#region Object Overrides
public override string ToString()
{
string toString = LocalType.ToString() + " (" + LocalIndex + ")";
if (IsPinned)
toString += " (pinned)";
return toString;
}
#endregion
#region Public Members
public virtual Type LocalType { get { Debug.Assert(m_type != null, "type must be set!"); return m_type; } }
public virtual bool IsPinned { get { return m_isPinned != 0; } }
public virtual int LocalIndex { get { return m_localIndex; } }
#endregion
}
}
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