1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
|
// 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.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 IMapView`2 interface on managed
// objects that implement IReadOnlyDictionary`2. 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 IReadOnlyDictionaryToIMapViewAdapter objects. Rather, they are of type
// IReadOnlyDictionary<K, V>. No actual IReadOnlyDictionaryToIMapViewAdapter object is ever instantiated. Thus, you will
// see a lot of expressions that cast "this" to "IReadOnlyDictionary<K, V>".
[DebuggerDisplay("Size = {Size}")]
internal sealed class IReadOnlyDictionaryToIMapViewAdapter
{
private IReadOnlyDictionaryToIMapViewAdapter()
{
Debug.Assert(false, "This class is never instantiated");
}
// V Lookup(K key)
internal V Lookup<K, V>(K key)
{
IReadOnlyDictionary<K, V> _this = JitHelpers.UnsafeCast<IReadOnlyDictionary<K, V>>(this);
V value;
bool keyFound = _this.TryGetValue(key, out value);
if (!keyFound)
{
Exception e = new KeyNotFoundException(Environment.GetResourceString("Arg_KeyNotFound"));
e.SetErrorCode(__HResults.E_BOUNDS);
throw e;
}
return value;
}
// uint Size { get }
internal uint Size<K, V>()
{
IReadOnlyDictionary<K, V> _this = JitHelpers.UnsafeCast<IReadOnlyDictionary<K, V>>(this);
return (uint)_this.Count;
}
// bool HasKey(K key)
internal bool HasKey<K, V>(K key)
{
IReadOnlyDictionary<K, V> _this = JitHelpers.UnsafeCast<IReadOnlyDictionary<K, V>>(this);
return _this.ContainsKey(key);
}
// void Split(out IMapView<K, V> first, out IMapView<K, V> second)
internal void Split<K, V>(out IMapView<K, V> first, out IMapView<K, V> second)
{
IReadOnlyDictionary<K, V> _this = JitHelpers.UnsafeCast<IReadOnlyDictionary<K, V>>(this);
if (_this.Count < 2) {
first = null;
second = null;
return;
}
ConstantSplittableMap<K, V> splittableMap = _this as ConstantSplittableMap<K, V>;
if (splittableMap == null)
splittableMap = new ConstantSplittableMap<K, V>(_this);
splittableMap.Split(out first, out second);
}
}
}
|
