using System;
using System.Runtime.CompilerServices;

namespace sharp.extensions
{
	public static class UInt64Extender
	{
		public static UInt64 RotateLeft(this UInt64 value, int count)
		{
			return (value << count) | (value >> (64 - count));
		}
		public static UInt64 RotateRight(this UInt64 value, int count)
		{
			return (value >> count) | (value << (64 - count));
		}

		public static byte[] GetBytes(this UInt64 value){
			return BitConverter.GetBytes(value);
		}
		public static byte[] GetBytes(this UInt64 value,Endianess endianess)
		{
			byte[] r = BitConverter.GetBytes(value);
			if (endianess != value.CurrentEndianess()){
				Array.Reverse(r);
			}
			return r;
		}

		public static byte[] GetBytes(this Int64 value)
		{
			return BitConverter.GetBytes(value);
		}
		public static byte[] GetBytes(this Int64 value, Endianess endianess)
		{
			byte[] r = BitConverter.GetBytes(value);
			if (endianess != value.CurrentEndianess())
			{
				Array.Reverse(r);
			}
			return r;
		}

		public static byte[] GetBytes(this Int32 value)
		{
			return BitConverter.GetBytes(value);
		}
		public static byte[] GetBytes(this Int32 value, Endianess endianess)
		{
			byte[] r = BitConverter.GetBytes(value);
			if (endianess != value.CurrentEndianess())
			{
				Array.Reverse(r);
			}
			return r;
		}

		public static byte[] GetBytes(this UInt32 value)
		{
			return BitConverter.GetBytes(value);
		}
		public static byte[] GetBytes(this UInt32 value, Endianess endianess)
		{
			byte[] r = BitConverter.GetBytes(value);
			if (endianess != value.CurrentEndianess())
			{
				Array.Reverse(r);
			}
			return r;
		}


		public static Endianess CurrentEndianess(this UInt64 v) { return BitConverter.IsLittleEndian ? Endianess.LittleEndian : Endianess.BigEndian; }
		public static Endianess CurrentEndianess(this UInt32 v) { return BitConverter.IsLittleEndian ? Endianess.LittleEndian : Endianess.BigEndian; }
		public static Endianess CurrentEndianess(this Int64 v) { return BitConverter.IsLittleEndian ? Endianess.LittleEndian : Endianess.BigEndian; }
		public static Endianess CurrentEndianess(this Int32 v) { return BitConverter.IsLittleEndian ? Endianess.LittleEndian : Endianess.BigEndian; }

		public static byte[] getBytes(this UInt32[] values)
		{
			byte[] b = new byte[values.Length << 2];
			for (int n = 0; n < values.Length; n++)
			{
				b.Insert(values[n].GetBytes(), n << 2);
			}
			return b;
		}
		public static UInt32[] toUInt32(this byte[] values)
		{
			UInt32[] r = new UInt32[ (values.Length + 0x03) >> 2  ];
			values = values.Extend(r.Length << 2);
			for (int n = 0; n < r.Length; n++)
			{
				r[n] = BitConverter.ToUInt32(values, (n << 2));
			}
			return r;
		}

	}
}