101 lines
3.1 KiB
C#
101 lines
3.1 KiB
C#
// Licensed to the Apache Software Foundation(ASF) under one
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// or more contributor license agreements.See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership.The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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using System.Collections;
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namespace Thrift.Collections
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{
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// ReSharper disable once InconsistentNaming
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public class TCollections
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{
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/// <summary>
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/// This will return true if the two collections are value-wise the same.
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/// If the collection contains a collection, the collections will be compared using this method.
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/// </summary>
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public static bool Equals(IEnumerable first, IEnumerable second)
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{
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if (first == null && second == null)
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{
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return true;
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}
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if (first == null || second == null)
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{
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return false;
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}
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var fiter = first.GetEnumerator();
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var siter = second.GetEnumerator();
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var fnext = fiter.MoveNext();
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var snext = siter.MoveNext();
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while (fnext && snext)
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{
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var fenum = fiter.Current as IEnumerable;
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var senum = siter.Current as IEnumerable;
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if (fenum != null && senum != null)
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{
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if (!Equals(fenum, senum))
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{
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return false;
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}
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}
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else if (fenum == null ^ senum == null)
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{
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return false;
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}
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else if (!Equals(fiter.Current, siter.Current))
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{
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return false;
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}
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fnext = fiter.MoveNext();
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snext = siter.MoveNext();
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}
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return fnext == snext;
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}
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/// <summary>
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/// This returns a hashcode based on the value of the enumerable.
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/// </summary>
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public static int GetHashCode(IEnumerable enumerable)
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{
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if (enumerable == null)
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{
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return 0;
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}
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var hashcode = 0;
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foreach (var obj in enumerable)
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{
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var enum2 = obj as IEnumerable;
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var objHash = enum2 == null ? obj.GetHashCode() : GetHashCode(enum2);
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unchecked
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{
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hashcode = (hashcode*397) ^ (objHash);
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}
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}
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return hashcode;
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}
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}
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} |