65 lines
1.7 KiB
C#
65 lines
1.7 KiB
C#
#region Copyright notice and license
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// Protocol Buffers - Google's data interchange format
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// Copyright 2017 Google Inc. All rights reserved.
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//
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file or at
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// https://developers.google.com/open-source/licenses/bsd
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#endregion
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using System.Collections.Generic;
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namespace Google.Protobuf.Collections
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{
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/// <summary>
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/// Utility to compare if two Lists are the same, and the hash code
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/// of a List.
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/// </summary>
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public static class Lists
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{
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/// <summary>
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/// Checks if two lists are equal.
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/// </summary>
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public static bool Equals<T>(List<T> left, List<T> right)
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{
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if (left == right)
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{
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return true;
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}
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if (left == null || right == null)
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{
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return false;
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}
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if (left.Count != right.Count)
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{
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return false;
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}
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IEqualityComparer<T> comparer = EqualityComparer<T>.Default;
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for (int i = 0; i < left.Count; i++)
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{
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if (!comparer.Equals(left[i], right[i]))
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{
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return false;
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}
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}
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return true;
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}
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/// <summary>
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/// Gets the list's hash code.
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/// </summary>
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public static int GetHashCode<T>(List<T> list)
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{
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if (list == null)
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{
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return 0;
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}
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int hash = 31;
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foreach (T element in list)
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{
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hash = hash * 29 + element.GetHashCode();
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}
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return hash;
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}
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}
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} |