109 lines
3.3 KiB
C#
109 lines
3.3 KiB
C#
// Copyright (c) 2014 AlphaSierraPapa for the SharpDevelop Team
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy of this
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// software and associated documentation files (the "Software"), to deal in the Software
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// without restriction, including without limitation the rights to use, copy, modify, merge,
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// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
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// to whom the Software is furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all copies or
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// substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
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// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
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// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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using System;
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namespace Unity.CodeEditor.Utils
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{
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/// <summary>
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/// Represents a string with a segment.
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/// Similar to System.ArraySegment<T>, but for strings instead of arrays.
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/// </summary>
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internal struct StringSegment : IEquatable<StringSegment>
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{
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/// <summary>
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/// Creates a new StringSegment.
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/// </summary>
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internal StringSegment(string text, int offset, int count)
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{
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if (text == null)
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throw new ArgumentNullException(nameof(text));
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if (offset < 0 || offset > text.Length)
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throw new ArgumentOutOfRangeException(nameof(offset));
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if (offset + count > text.Length)
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throw new ArgumentOutOfRangeException(nameof(count));
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Text = text;
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Offset = offset;
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Count = count;
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}
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/// <summary>
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/// Creates a new StringSegment.
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/// </summary>
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internal StringSegment(string text)
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{
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Text = text ?? throw new ArgumentNullException(nameof(text));
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Offset = 0;
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Count = text.Length;
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}
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/// <summary>
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/// Gets the string used for this segment.
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/// </summary>
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internal string Text { get; }
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/// <summary>
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/// Gets the start offset of the segment with the text.
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/// </summary>
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internal int Offset { get; }
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/// <summary>
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/// Gets the length of the segment.
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/// </summary>
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internal int Count { get; }
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#region Equals and GetHashCode implementation
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/// <inheritdoc/>
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public override bool Equals(object obj)
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{
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if (obj is StringSegment)
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return Equals((StringSegment)obj); // use Equals method below
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return false;
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}
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/// <inheritdoc/>
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public bool Equals(StringSegment other)
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{
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// add comparisions for all members here
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return ReferenceEquals(Text, other.Text) && Offset == other.Offset && Count == other.Count;
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}
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/// <inheritdoc/>
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public override int GetHashCode()
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{
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return Text.GetHashCode() ^ Offset ^ Count;
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}
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/// <summary>
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/// Equality operator.
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/// </summary>
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public static bool operator ==(StringSegment left, StringSegment right)
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{
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return left.Equals(right);
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}
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/// <summary>
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/// Inequality operator.
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/// </summary>
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public static bool operator !=(StringSegment left, StringSegment right)
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{
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return !left.Equals(right);
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}
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#endregion
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}
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} |