111 lines
3.2 KiB
C#
111 lines
3.2 KiB
C#
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#region License
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// Copyright (c) 2007 James Newton-King
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//
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// Permission is hereby granted, free of charge, to any person
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// obtaining a copy of this software and associated documentation
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// files (the "Software"), to deal in the Software without
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// restriction, including without limitation the rights to use,
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// copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following
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// conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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// OTHER DEALINGS IN THE SOFTWARE.
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#endregion
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using System;
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namespace LC.Newtonsoft.Json.Utilities
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{
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internal readonly struct StringReference
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{
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private readonly char[] _chars;
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private readonly int _startIndex;
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private readonly int _length;
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public char this[int i] => _chars[i];
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public char[] Chars => _chars;
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public int StartIndex => _startIndex;
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public int Length => _length;
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public StringReference(char[] chars, int startIndex, int length)
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{
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_chars = chars;
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_startIndex = startIndex;
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_length = length;
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}
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public override string ToString()
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{
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return new string(_chars, _startIndex, _length);
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}
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}
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internal static class StringReferenceExtensions
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{
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public static int IndexOf(this StringReference s, char c, int startIndex, int length)
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{
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int index = Array.IndexOf(s.Chars, c, s.StartIndex + startIndex, length);
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if (index == -1)
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{
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return -1;
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}
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return index - s.StartIndex;
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}
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public static bool StartsWith(this StringReference s, string text)
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{
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if (text.Length > s.Length)
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{
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return false;
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}
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char[] chars = s.Chars;
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for (int i = 0; i < text.Length; i++)
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{
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if (text[i] != chars[i + s.StartIndex])
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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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public static bool EndsWith(this StringReference s, string text)
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{
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if (text.Length > s.Length)
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{
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return false;
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}
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char[] chars = s.Chars;
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int start = s.StartIndex + s.Length - text.Length;
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for (int i = 0; i < text.Length; i++)
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{
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if (text[i] != chars[i + start])
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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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}
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}
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