62 lines
2.1 KiB
C#
62 lines
2.1 KiB
C#
// This file is part of YamlDotNet - A .NET library for YAML.
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// Copyright (c) Antoine Aubry and contributors
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy of
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// this software and associated documentation files (the "Software"), to deal in
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// the Software without restriction, including without limitation the rights to
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// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
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// of the Software, and to permit persons to whom the Software is furnished to do
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// 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
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// 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, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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using System;
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namespace YamlDotNet.Core
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{
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internal sealed class StringLookAheadBuffer : ILookAheadBuffer
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{
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private readonly string value;
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public int Position { get; private set; }
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public StringLookAheadBuffer(string value)
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{
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this.value = value;
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}
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public int Length => value.Length;
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public bool EndOfInput => IsOutside(Position);
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public char Peek(int offset)
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{
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var index = Position + offset;
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return IsOutside(index) ? '\0' : value[index];
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}
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private bool IsOutside(int index)
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{
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return index >= value.Length;
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}
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public void Skip(int length)
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{
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if (length < 0)
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{
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throw new ArgumentOutOfRangeException(nameof(length), "The length must be positive.");
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}
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Position += length;
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}
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}
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}
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