using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace BinarySerialize
{
    class ConfigParse
    {

        public static uint GetUint(byte[] stream, int valuePos)
        {


            return  (uint)((stream[valuePos] & 0xFF)
                    | ((stream[valuePos + 1] & 0xFF) << 8)
                    | ((stream[valuePos + 2] & 0xFF) << 16)
                    | ((stream[valuePos + 3] & 0xFF) << 24));
        }

        public static int GetInt(byte[] stream, int valuePos)
        {

            return (int)((stream[valuePos] & 0xFF)
                    | ((stream[valuePos + 1] & 0xFF) << 8)
                    | ((stream[valuePos + 2] & 0xFF) << 16)
                    | ((stream[valuePos + 3] & 0xFF) << 24));
        }


        public static long GetLong(byte[] stream, int valuePos)
        {
            return (long)((stream[valuePos] & 0xFF)
                    | ((stream[valuePos + 1] & 0xFF) << 8)
                    | ((stream[valuePos + 2] & 0xFF) << 16)
                    | ((stream[valuePos + 3] & 0xFF) << 24)
                    | ((stream[valuePos + 4] & 0xFF) << 32)
                    | ((stream[valuePos + 5] & 0xFF) << 40)
                    | ((stream[valuePos + 6] & 0xFF) << 48)
                    | ((stream[valuePos + 7] & 0xFF) << 56));
        }

        public static string GetString(byte[] stream, int valuePos, byte[] strStream)
        {
            int strlen = (int)((stream[valuePos] & 0xFF)
                    | ((stream[valuePos + 1] & 0xFF) << 8)
                    | ((stream[valuePos + 2] & 0xFF) << 16)
                    | ((stream[valuePos + 3] & 0xFF) << 24));

            valuePos += 4;
            int strpos = (int)((stream[valuePos] & 0xFF)
                    | ((stream[valuePos + 1] & 0xFF) << 8)
                    | ((stream[valuePos + 2] & 0xFF) << 16)
                    | ((stream[valuePos + 3] & 0xFF) << 24));


            return Encoding.UTF8.GetString(strStream.Skip(strpos).Take(strlen).ToArray());
        }




    }
}