// $Id$
// 
// Copyright 2007-2008 Cisco Systems Inc.
// 
// Licensed under the Apache License, Version 2.0 (the "License"); you may not
// use this file 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;

namespace Etch.Util
{
    public class CharIterator 
    {
        private readonly String _s;
        private readonly int _n;
        private int _i = -1;

        public CharIterator( String s )
        {
            if ( s == null )
                throw new ArgumentNullException( "String to iterate over shouldn't be null" );

            _s = s;
            _n = s.Length;
        }

        public Boolean MoveNext()
        {
            if ( _i < (_n-1) )
            {
                _i++;
                return true;
            }
            else
                return false;
        }

        public Char Current
        {
            get
            {
                return _s[ _i ];
            }
        }
    }
}