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c#bytebooleansteganography

C# byte[] to List<bool>


From bool[] to byte[]: Convert bool[] to byte[]

But I need to convert a byte[] to a List where the first item in the list is the LSB.

I tried the code below but when converting to bytes and back to bools again I have two totally different results...:

public List<bool> Bits = new List<bool>();


    public ToBools(byte[] values)
    {
        foreach (byte aByte in values)
        {
            for (int i = 0; i < 7; i++)
            {
                Bits.Add(aByte.GetBit(i));
            }
        }
    }



    public static bool GetBit(this byte b, int index)
    {
        if (b == 0)
            return false;

        BitArray ba = b.Byte2BitArray();
        return ba[index];
    }

Solution

  • You're only considering 7 bits, not 8. This instruction:

    for (int i = 0; i < 7; i++)
    

    Should be:

    for (int i = 0; i < 8; i++)
    

    Anyway, here's how I would implement it:

    byte[] bytes = ...
    List<bool> bools = bytes.SelectMany(GetBitsStartingFromLSB).ToList();
    
    ...
    
    static IEnumerable<bool> GetBitsStartingFromLSB(byte b)
    {
        for(int i = 0; i < 8; i++)
        {
            yield return (b % 2 == 0) ? false : true;
            b = (byte)(b >> 1);
        }
    }