/* Poly2Tri
 * Copyright (c) 2009-2010, Poly2Tri Contributors
 * http://code.google.com/p/poly2tri/
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * * Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 * * Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 * * Neither the name of Poly2Tri nor the names of its contributors may be
 *   used to endorse or promote products derived from this software without specific
 *   prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
using System;
using System.Collections;
using System.Collections.Generic;

namespace WPM.Poly2Tri {
	public struct FixedBitArray3 : IEnumerable<bool> {
		public bool _0, _1, _2;

		public bool this [int index] {
			get {
				switch (index) {
				case 0:
					return _0;
				case 1:
					return _1;
				case 2:
					return _2;
				default:
					throw new IndexOutOfRangeException ();
				}
			}
			set {
				switch (index) {
				case 0:
					_0 = value;
					break;
				case 1:
					_1 = value;
					break;
				case 2:
					_2 = value;
					break;
				default:
					throw new IndexOutOfRangeException ();
				}
			}
		}

		public bool Contains (bool value) {
			return _0 == value || _1 == value || _2 == value;
//			for (int i = 0; i < 3; ++i) {
//				if (this [i] == value) {
//					return true;
//				}
//			}
//
//			return false;
		}
        
		public int IndexOf (bool value) {
			if (_0 == value)
				return 0;
			if (_1 == value)
				return 1;
			if (_2 == value)
				return 2;
			return -1;

//			for (int i = 0; i < 3; ++i) {
//				if (this [i] == value) {
//					return i;
//				}
//			}
//
//			return -1;
		}
        
		public void Clear () {
			_0 = _1 = _2 = false;
		}
        
		public void Clear (bool value) {
			for (int i = 0; i < 3; ++i) {
				if (this [i] == value) {
					this [i] = false;
				}
			}
		}

		private IEnumerable<bool> Enumerate () {
			for (int i = 0; i < 3; ++i) {
				yield return this [i];
			}
		}
        
		public IEnumerator<bool> GetEnumerator () {
			return Enumerate ().GetEnumerator ();
		}
        
		IEnumerator IEnumerable.GetEnumerator () {
			return GetEnumerator ();
		}
	}
}