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// **********************************************************************
//
// Copyright (c) 2003-2009 ZeroC, Inc. All rights reserved.
//
// This copy of Ice is licensed to you under the terms described in the
// ICE_LICENSE file included in this distribution.
//
// **********************************************************************
using System.Collections;
namespace IceUtilInternal
{
public sealed class Collections
{
public static bool SequenceEquals(ICollection seq1, ICollection seq2)
{
if(object.ReferenceEquals(seq1, seq2))
{
return true;
}
if((seq1 == null && seq2 != null) || (seq1 != null && seq2 == null))
{
return false;
}
if(seq1.Count == seq2.Count)
{
IEnumerator e1 = seq1.GetEnumerator();
IEnumerator e2 = seq2.GetEnumerator();
while(e1.MoveNext())
{
e2.MoveNext();
if(e1.Current == null)
{
if(e2.Current != null)
{
return false;
}
}
else if(!e1.Current.Equals(e2.Current))
{
return false;
}
}
return true;
}
return false;
}
public static bool SequenceEquals(IEnumerable seq1, IEnumerable seq2)
{
if(object.ReferenceEquals(seq1, seq2))
{
return true;
}
if((seq1 == null && seq2 != null) || (seq1 != null && seq2 == null))
{
return false;
}
IEnumerator e1 = seq1.GetEnumerator();
IEnumerator e2 = seq2.GetEnumerator();
while(e1.MoveNext())
{
if(!e2.MoveNext())
{
return false;
}
if(e1.Current == null)
{
if(e2.Current != null)
{
return false;
}
}
else if(!e1.Current.Equals(e2.Current))
{
return false;
}
}
if(e2.MoveNext())
{
return false;
}
return true;
}
public static int SequenceGetHashCode(IEnumerable seq)
{
int h = 0;
IEnumerator e = seq.GetEnumerator();
while(e.MoveNext())
{
if(e.Current != null)
{
h = 5 * h + e.Current.GetHashCode();
}
}
return h;
}
public static bool DictionaryEquals(IDictionary d1, IDictionary d2)
{
if(object.ReferenceEquals(d1, d2))
{
return true;
}
if((d1 == null && d2 != null) || (d1 != null && d2 == null))
{
return false;
}
if(d1.Count == d2.Count)
{
IDictionaryEnumerator e1 = d1.GetEnumerator();
IDictionaryEnumerator e2 = d2.GetEnumerator();
while(e1.MoveNext())
{
e2.MoveNext();
if(!e1.Key.Equals(e2.Key))
{
return false;
}
if(e1.Value == null)
{
if(e2.Value != null)
{
return false;
}
}
else if(!e1.Value.Equals(e2.Value))
{
return false;
}
}
return true;
}
return false;
}
public static int DictionaryGetHashCode(IDictionary d)
{
int h = 0;
IDictionaryEnumerator e = d.GetEnumerator();
while(e.MoveNext())
{
h = 5 * h + e.Key.GetHashCode();
if(e.Value != null)
{
h = 5 * h + e.Key.GetHashCode();
}
}
return h;
}
}
}
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