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using System;
using System.Collections.Generic;
using System.Runtime.CompilerServices;
using ProtoBuf.Meta;
namespace ProtoBuf
{
internal sealed class NetObjectCache
{
private MutableList List
{
get
{
bool flag = this.underlyingList == null;
if (flag)
{
this.underlyingList = new MutableList();
}
return this.underlyingList;
}
}
internal const int Root = 0;
private MutableList underlyingList;
private object rootObject;
private int trapStartIndex;
private Dictionary<string, int> stringKeys;
private Dictionary<object, int> objectKeys;
private sealed class ReferenceComparer : IEqualityComparer<object>
{
public static readonly NetObjectCache.ReferenceComparer Default = new NetObjectCache.ReferenceComparer();
private ReferenceComparer()
{
}
bool IEqualityComparer<object>.Equals(object x, object y)
{
return x == y;
}
int IEqualityComparer<object>.GetHashCode(object obj)
{
return RuntimeHelpers.GetHashCode(obj);
}
}
internal object GetKeyedObject(int key)
{
bool flag = key-- == 0;
object result;
if (flag)
{
bool flag2 = this.rootObject == null;
if (flag2)
{
throw new ProtoException("No root object assigned");
}
result = this.rootObject;
}
else
{
BasicList list = this.List;
bool flag3 = key < 0 || key >= list.Count;
if (flag3)
{
Helpers.DebugWriteLine("Missing key: " + key);
throw new ProtoException("Internal error; a missing key occurred");
}
object obj = list[key];
bool flag4 = obj == null;
if (flag4)
{
throw new ProtoException("A deferred key does not have a value yet");
}
result = obj;
}
return result;
}
internal void SetKeyedObject(int key, object value)
{
bool flag = key-- == 0;
if (flag)
{
bool flag2 = value == null;
if (flag2)
{
throw new ArgumentNullException("value");
}
bool flag3 = this.rootObject != null && this.rootObject != value;
if (flag3)
{
throw new ProtoException("The root object cannot be reassigned");
}
this.rootObject = value;
}
else
{
MutableList list = this.List;
bool flag4 = key < list.Count;
if (flag4)
{
object obj = list[key];
bool flag5 = obj == null;
if (flag5)
{
list[key] = value;
}
else
{
bool flag6 = obj != value;
if (flag6)
{
throw new ProtoException("Reference-tracked objects cannot change reference");
}
}
}
else
{
bool flag7 = key != list.Add(value);
if (flag7)
{
throw new ProtoException("Internal error; a key mismatch occurred");
}
}
}
}
internal int AddObjectKey(object value, out bool existing)
{
bool flag = value == null;
if (flag)
{
throw new ArgumentNullException("value");
}
bool flag2 = value == this.rootObject;
int result;
if (flag2)
{
existing = true;
result = 0;
}
else
{
string text = value as string;
BasicList list = this.List;
bool flag3 = text == null;
int num;
if (flag3)
{
bool flag4 = this.objectKeys == null;
if (flag4)
{
this.objectKeys = new Dictionary<object, int>(NetObjectCache.ReferenceComparer.Default);
num = -1;
}
else
{
bool flag5 = !this.objectKeys.TryGetValue(value, out num);
if (flag5)
{
num = -1;
}
}
}
else
{
bool flag6 = this.stringKeys == null;
if (flag6)
{
this.stringKeys = new Dictionary<string, int>();
num = -1;
}
else
{
bool flag7 = !this.stringKeys.TryGetValue(text, out num);
if (flag7)
{
num = -1;
}
}
}
bool flag8 = !(existing = (num >= 0));
if (flag8)
{
num = list.Add(value);
bool flag9 = text == null;
if (flag9)
{
this.objectKeys.Add(value, num);
}
else
{
this.stringKeys.Add(text, num);
}
}
result = num + 1;
}
return result;
}
internal void RegisterTrappedObject(object value)
{
bool flag = this.rootObject == null;
if (flag)
{
this.rootObject = value;
}
else
{
bool flag2 = this.underlyingList != null;
if (flag2)
{
for (int i = this.trapStartIndex; i < this.underlyingList.Count; i++)
{
this.trapStartIndex = i + 1;
bool flag3 = this.underlyingList[i] == null;
if (flag3)
{
this.underlyingList[i] = value;
break;
}
}
}
}
}
internal void Clear()
{
this.trapStartIndex = 0;
this.rootObject = null;
bool flag = this.underlyingList != null;
if (flag)
{
this.underlyingList.Clear();
}
bool flag2 = this.stringKeys != null;
if (flag2)
{
this.stringKeys.Clear();
}
bool flag3 = this.objectKeys != null;
if (flag3)
{
this.objectKeys.Clear();
}
}
}
}
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