sbox-public/engine/ThirdParty/Topten.RichTextKit/Utils/ArrayEnumerator.cs

// RichTextKit
// Copyright © 2019-2020 Topten Software. All Rights Reserved.
// 
// Licensed under the Apache License, Version 2.0 (the "License"); you may 
// not use this product except in compliance with the License. You may obtain 
// a copy of the License at
// 
// http://www.apache.org/licenses/LICENSE-2.0
// 
// Unless required by applicable law or agreed to in writing, software 
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT 
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the 
// License for the specific language governing permissions and limitations 
// under the License.

using System;
using System.Collections;
using System.Collections.Generic;
using System.Text;

namespace Topten.RichTextKit
{
	class ArraySliceEnumerator<T> : IEnumerator<T>, IEnumerator
	{
		public ArraySliceEnumerator( T[] arr, int start, int length )
		{
			_arr = arr;
			_start = start;
			_end = start + length;
			_current = _start - 1;
		}

		T[] _arr;
		int _start;
		int _end;
		int _current;

		public T Current
		{
			get
			{
				if ( _current < _end )
					return _arr[_current];
				else
					return default( T );
			}
		}


		object IEnumerator.Current => Current;

		public bool MoveNext()
		{
			if ( _current < _end )
				_current++;

			return _current < _end;
		}

		public void Reset()
		{
			_current = _start - 1;
		}

		public void Dispose()
		{
		}
	}
}