Strange Notepad++ HEX-editor plugin

Question

The goal is to write byte array to file.
I have byte array fits[] with some bytes and then:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.IO;



namespace _32_to_16

{

    class Program

    {

        static void Main(string[] args)

        {

            byte[] fits = File.ReadAllBytes("1.myf");

            byte[] img = new byte[fits.Length / 2];

            for (int i = 0; i < fits.Length; i += 4) //Drops 2 high bytes

            {

                img[i/2] = fits[i + 2];

                img[i/2 + 1] = fits[i + 3];

            }

            File.WriteAllBytes("new.myf", img);

        }

    }

}

Before writing to the file img[] has same values:

img[0]=0x31

img[1]=0x27

img[2]=0x31

img[3]=0xe2

and so on...

After writing to file, in HEX editor i see

00000000: 31 27 31 3f and other wrong values.

Sometimes, with other fits[] values, img[] array write correctly to file. What I`m doing wrong?

File for test 1.myf (which makes wrong results) https://www.dropbox.com/s/6xyf761oqm8j7y1/1.myf?dl=0
File for test 2.myf (correct writes to file) https://www.dropbox.com/s/zrglpx7kmpydurz/2.myf?dl=0

I simplified the code:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.IO;



namespace _32_to_16

{

    class Program

    {

        static void Main(string[] args)

        {

            byte[] img_correct = new byte[8] { 0xbd, 0x19, 0xbd, 0x72, 0xbd, 0x93, 0xbd, 0xf7 };

            File.WriteAllBytes("img_correct.myf", img_correct);



            byte[] img_strange = new byte[8] { 0x33, 0x08, 0x33, 0xac, 0x33, 0xe3, 0x33, 0x94 };

            File.WriteAllBytes("img_strange.myf", img_strange);

        }

    }

}

in HEX-editor img_correct.myf looks like this:
bd 19 bd 72 bd 93 bd f7

in HEX-editor img_strange.myf looks like this:
33 08 33 3f 3f 3f

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Answer 1

You're using the HEX-Editor plugin from Notepad++, which seems to have a problem reading binary files.

Try with another hex editor and it should display the correct values.

Here's a screenshot of HxD and HEX-Editor displaying the same file

Strange Notepad++ HEX-editor plugin

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