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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.Runtime;
using System.Security;
using System.Collections;
using System.Collections.Generic;
using System.Diagnostics;
using System.Diagnostics.Contracts;
using System.Runtime.InteropServices;
using System.Runtime.CompilerServices;
namespace System.Runtime.InteropServices.WindowsRuntime
{
// This is a set of stub methods implementing the support for the IList interface on WinRT
// objects that support IBindableVector. Used by the interop mashaling infrastructure.
//
// The methods on this class must be written VERY carefully to avoid introducing security holes.
// That's because they are invoked with special "this"! The "this" object
// for all of these methods are not BindableVectorToListAdapter objects. Rather, they are
// of type IBindableVector. No actual BindableVectorToListAdapter object is ever instantiated.
// Thus, you will see a lot of expressions that cast "this" to "IBindableVector".
internal sealed class BindableVectorToListAdapter
{
private BindableVectorToListAdapter()
{
Debug.Assert(false, "This class is never instantiated");
}
// object this[int index] { get }
internal object Indexer_Get(int index)
{
if (index < 0)
throw new ArgumentOutOfRangeException(nameof(index));
IBindableVector _this = JitHelpers.UnsafeCast<IBindableVector>(this);
return GetAt(_this, (uint)index);
}
// object this[int index] { set }
internal void Indexer_Set(int index, object value)
{
if (index < 0)
throw new ArgumentOutOfRangeException(nameof(index));
IBindableVector _this = JitHelpers.UnsafeCast<IBindableVector>(this);
SetAt(_this, (uint)index, value);
}
// int Add(object value)
internal int Add(object value)
{
IBindableVector _this = JitHelpers.UnsafeCast<IBindableVector>(this);
_this.Append(value);
uint size = _this.Size;
if (((uint)Int32.MaxValue) < size)
{
throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_CollectionBackingListTooLarge"));
}
return (int)(size - 1);
}
// bool Contains(object item)
internal bool Contains(object item)
{
IBindableVector _this = JitHelpers.UnsafeCast<IBindableVector>(this);
uint index;
return _this.IndexOf(item, out index);
}
// void Clear()
internal void Clear()
{
IBindableVector _this = JitHelpers.UnsafeCast<IBindableVector>(this);
_this.Clear();
}
// bool IsFixedSize { get }
[Pure]
internal bool IsFixedSize()
{
return false;
}
// bool IsReadOnly { get }
[Pure]
internal bool IsReadOnly()
{
return false;
}
// int IndexOf(object item)
internal int IndexOf(object item)
{
IBindableVector _this = JitHelpers.UnsafeCast<IBindableVector>(this);
uint index;
bool exists = _this.IndexOf(item, out index);
if (!exists)
return -1;
if (((uint)Int32.MaxValue) < index)
{
throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_CollectionBackingListTooLarge"));
}
return (int)index;
}
// void Insert(int index, object item)
internal void Insert(int index, object item)
{
if (index < 0)
throw new ArgumentOutOfRangeException(nameof(index));
IBindableVector _this = JitHelpers.UnsafeCast<IBindableVector>(this);
InsertAtHelper(_this, (uint)index, item);
}
// bool Remove(object item)
internal void Remove(object item)
{
IBindableVector _this = JitHelpers.UnsafeCast<IBindableVector>(this);
uint index;
bool exists = _this.IndexOf(item, out index);
if (exists)
{
if (((uint)Int32.MaxValue) < index)
{
throw new InvalidOperationException(Environment.GetResourceString("InvalidOperation_CollectionBackingListTooLarge"));
}
RemoveAtHelper(_this, index);
}
}
// void RemoveAt(int index)
internal void RemoveAt(int index)
{
if (index < 0)
throw new ArgumentOutOfRangeException(nameof(index));
IBindableVector _this = JitHelpers.UnsafeCast<IBindableVector>(this);
RemoveAtHelper(_this, (uint)index);
}
// Helpers:
private static object GetAt(IBindableVector _this, uint index)
{
try
{
return _this.GetAt(index);
// We delegate bounds checking to the underlying collection and if it detected a fault,
// we translate it to the right exception:
}
catch (Exception ex)
{
if (__HResults.E_BOUNDS == ex._HResult)
throw new ArgumentOutOfRangeException(nameof(index));
throw;
}
}
private static void SetAt(IBindableVector _this, uint index, object value)
{
try
{
_this.SetAt(index, value);
// We delegate bounds checking to the underlying collection and if it detected a fault,
// we translate it to the right exception:
}
catch (Exception ex)
{
if (__HResults.E_BOUNDS == ex._HResult)
throw new ArgumentOutOfRangeException(nameof(index));
throw;
}
}
private static void InsertAtHelper(IBindableVector _this, uint index, object item)
{
try
{
_this.InsertAt(index, item);
// We delegate bounds checking to the underlying collection and if it detected a fault,
// we translate it to the right exception:
}
catch (Exception ex)
{
if (__HResults.E_BOUNDS == ex._HResult)
throw new ArgumentOutOfRangeException(nameof(index));
throw;
}
}
private static void RemoveAtHelper(IBindableVector _this, uint index)
{
try
{
_this.RemoveAt(index);
// We delegate bounds checking to the underlying collection and if it detected a fault,
// we translate it to the right exception:
}
catch (Exception ex)
{
if (__HResults.E_BOUNDS == ex._HResult)
throw new ArgumentOutOfRangeException(nameof(index));
throw;
}
}
}
}
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