// $Id$
// 
// 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.

namespace Etch.Transport.Fmt
{
    /// <summary>
    /// Class that provides methods for : 
    /// 1) Converting a single value from byte to sbyte.
    /// 2) Converting a single value for sbyte to byte.
    /// 3) Converting an array of values of the 2 above.
    /// </summary>
    public static class ByteConverter
    {
        /// <summary>
        /// Converts a byte value to an sbyte value.
        /// </summary>
        /// <param name="value"></param>
        /// <returns></returns>
        public static sbyte ByteToSbyte( byte value )
        {
            sbyte convertedValue = 0;

            if ( value > 127 )
                convertedValue = ( sbyte ) ( 127 - value );

            return convertedValue;
        }

        public static byte SbyteToByte( sbyte value )
        {
            byte convertedValue = 0;

            if ( value < 0 )
                convertedValue = ( byte ) ( 127 - value );

            return convertedValue;
        }
    }
}