66 lines
1.8 KiB
C#
66 lines
1.8 KiB
C#
//------------------------------------------------------------------------------
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// <copyright file="DoubleLink.cs" company="Microsoft">
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// Copyright (c) Microsoft Corporation. All rights reserved.
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// </copyright>
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//------------------------------------------------------------------------------
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/*
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* DoubleLink
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*
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* Copyright (c) 1998-1999, Microsoft Corporation
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*
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*/
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namespace System.Web.Util {
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using System.Runtime.Serialization.Formatters;
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internal class DoubleLink {
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internal DoubleLink _next, _prev;
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internal Object Item;
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internal DoubleLink() {
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_next = _prev = this;
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}
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internal DoubleLink(Object item) : this() {
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this.Item = item;
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}
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internal DoubleLink Next {get {return _next;}}
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internal void InsertAfter(DoubleLink after) {
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this._prev = after;
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this._next = after._next;
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after._next = this;
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this._next._prev = this;
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}
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internal void InsertBefore(DoubleLink before) {
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this._prev = before._prev;
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this._next = before;
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before._prev = this;
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this._prev._next = this;
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}
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internal void Remove() {
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this._prev._next = this._next;
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this._next._prev = this._prev;
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_next = _prev = this;
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}
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#if DBG
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internal virtual void DebugValidate() {
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Debug.CheckValid(this._next != this || this._prev == this, "Invalid link");
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}
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internal virtual string DebugDescription(string indent) {
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string desc;
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desc = indent + "_next=" + _next + ", _prev=" + _prev + "\nItem=";
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desc += Debug.GetDescription(Item, indent + " ");
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return desc;
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}
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#endif
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}
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}
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