#region
/* -----------------------------------------------------------------------
 * <copyright file="MarshalHelpers.cs" company="GRNet">
 * 
 * Copyright 2011-2012 GRNET S.A. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or
 * without modification, are permitted provided that the following
 * conditions are met:
 *
 *   1. Redistributions of source code must retain the above
 *      copyright notice, this list of conditions and the following
 *      disclaimer.
 *
 *   2. 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.
 *
 *
 * THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``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 GRNET S.A 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
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 * </copyright>
 * -----------------------------------------------------------------------
 */
#endregion
using System;
using System.Diagnostics.Contracts;
using System.Runtime.InteropServices;
using System.Text;

namespace Pithos.ShellExtensions
{
    public static class MarshalHelpers
    {
        
        public static void CopyToBuffer(string input, IntPtr buffer, int bufferSize)
        {        
            Contract.Requires(buffer != IntPtr.Zero);
            Contract.Requires(bufferSize >=0 );
            
            var bytes = Encoding.Unicode.GetBytes(input);
            
            if (bytes.Length + 2 >= bufferSize) 
                return;

            for (var i = 0; i < bytes.Length; i++)
            {
                Marshal.WriteByte(buffer, i, bytes[i]);
            }
            //write the null terminator "\0\0" 
            Marshal.WriteByte(buffer, bytes.Length, 0);
            Marshal.WriteByte(buffer, bytes.Length + 1, 0);
        }
    }
}