Iaik.Utils.ByteStream.Seek C# (CSharp) Method

        public override long Seek(long offset, SeekOrigin origin)
        {
            long newOffset;
            if(origin == SeekOrigin.Begin)
                newOffset = offset;
            else if(origin == SeekOrigin.Current)
                newOffset = _currentPosition + offset;
            else if(origin == SeekOrigin.End)
                newOffset = _data.Length - offset;
            else
                throw new ArgumentException("Unknown origin");

            if(newOffset >= _data.Length || newOffset < 0)
                throw new IOException("You can not seek out of the array!");

            _currentPosition = (int)newOffset;
            return _currentPosition;
        }

        public void TestByteStream()
        {
            byte[] data = new byte[1024];
            for(int i = 0; i<1024; i++)
                data[i] = (byte)(i%256);

            ByteStream bStream = new ByteStream(data);

            byte[] buffer = new byte[512];
            bStream.Read(buffer, 0, 512);
            for(int bufferIndex = 0; bufferIndex<buffer.Length; bufferIndex++)
            {
                if(buffer[bufferIndex] != bufferIndex % 256)
                    throw new Exception("Expecting " + (bufferIndex).ToString());
            }

            bStream.Seek(0, SeekOrigin.Begin);
            if(bStream.ReadByte() != 0)
                throw new Exception("Expecting expected 0");

            if(bStream.ReadByte() != 1)
                throw new Exception("Expecting expected 1");

            bStream.Seek(510, SeekOrigin.Current);
            bStream.Read(buffer, 0, 512);
            for(int i = 0; i<buffer.Length; i++)
            {
                if(buffer[i] != (i+512)%256)
                    throw new Exception("Expecting " + (i+512).ToString());
            }
        }