namespace JD.Serializers.Stream
{
    public static class StreamExtensions
    {
        /// <summary>
        /// Appends the current stream to the destination stream.
        /// </summary>
        /// <remarks>
        /// Copying starts from the current position in the source stream.
        /// </remarks>
        /// <param name="srcStream">Source stream.</param>
        /// <param name="dstStream">Destination stream.</param>
        public static void AppendTo(this System.IO.Stream srcStream, System.IO.Stream dstStream)
        {
            const int ChunkSize = 64 * 1024;
            byte[] buffer = new byte[ChunkSize];

            int bytesRead;
            while ((bytesRead = srcStream.Read(buffer, 0, ChunkSize)) > 0)
            {
                dstStream.Write(buffer, 0, bytesRead);
            }
        }
    }
}