// Copyright Epic Games, Inc. All Rights Reserved.

using System;
using System.IO;

namespace MemoryProfiler2
{
	/**
	 * Big endian version of binary reader.
	 */
	public class BinaryReaderBigEndian : BinaryReader
	{
		byte[] SwappedBytes = new byte[8];

		/**
		 * Constructor, passing arguments to base class.
		 */
		public BinaryReaderBigEndian(Stream Input)
			: base(Input, System.Text.Encoding.ASCII)
		{
		}

		/**
		 * Reads & swaps bytes array of size count.
		 */
		private byte[] ReadSwappedBytes(int Count)
		{
			for (int i = Count - 1; i >= 0; i--)
			{
				SwappedBytes[i] = ReadByte();
			}
			return SwappedBytes;
		}

		/**
		 * Reads an UInt16 from stream and returns it.
		 */
		public override ushort ReadUInt16()
		{
			return BitConverter.ToUInt16(ReadSwappedBytes(2), 0);
		}

		/**
		 * Reads an Int16 from stream and returns it.
		 */
		public override short ReadInt16()
		{
			return BitConverter.ToInt16(ReadSwappedBytes(2), 0);
		}

		/**
		 * Reads an UInt32 from stream and returns it.
		 */
		public override int ReadInt32()
		{
			return BitConverter.ToInt32(ReadSwappedBytes(4), 0);
		}

		/**
		 * Reads an Int32 from stream and returns it.
		 */
		public override uint ReadUInt32()
		{
			return BitConverter.ToUInt32(ReadSwappedBytes(4), 0);
		}

		/**
		 * Reads an UInt64 from stream and returns it.
		 */
		public override long ReadInt64()
		{
			return BitConverter.ToInt64(ReadSwappedBytes(8), 0);
		}

		/**
		 * Reads an Int64 from stream and returns it.
		 */
		public override ulong ReadUInt64()
		{
			return BitConverter.ToUInt64(ReadSwappedBytes(8), 0);
		}

		/**
		 * Reads a float from stream and returns it.
		 */
		public override float ReadSingle()
		{
			return BitConverter.ToSingle(ReadSwappedBytes(4), 0);
		}

		/**
		 * Reads a double from stream and returns it.
		 */
		public override double ReadDouble()
		{
			return BitConverter.ToDouble(ReadSwappedBytes(8), 0);
		}
	}
}