Converting 8 bit bytes to 16 bit byte

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i have a byte array.. Each index is having values like 0x01, 0x1D etc.. It can be seen that these values are 8 bit numbers. I want to convert them to 16 bit numbers.  for example, I want this type of result 0x0001 0x001D.  Is there some way to do this in C#?

What I have tried:

BitConverter class will be used. i want to get unsigned numbers. i am not sure which method will be used of BitConverter Class.

Posted 6-Jun-18 0:43am

hamid18

Updated 6-Jun-18 1:08am

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Jochen Arndt · Accepted Answer · 2018-06-06T01:10:00

Solution 2

There is no existing method as already noted in solution 1.

But it is quite simple to declare an array of ushort with the same number of items as in the byte array and copy the data within a loop:

C#

ushort[] arr16 = new ushort[arr8.Length];
for (int i = 0; i < arr8.Length; i++)
{
    arr16[i] = arr8[i];
}

Posted 6-Jun-18 1:10am

Jochen Arndt

Updated 6-Jun-18 1:26am

v2

Comments

hamid18 6-Jun-18 9:12am

thank you. it worked for me

Richard Deeming 6-Jun-18 9:17am

You could simplify that slightly by using Array.ConvertAll[^]

ushort[] arr16 = Array.ConvertAll(arr8, b => (ushort)b);

However, for very large arrays, the performance impact of invoking the delegate for each item might become a problem.

Jochen Arndt 6-Jun-18 9:23am

Thank you for sharing that. Have not looked for the Array conversion routines.

[EDIT]
Don't you think that such a simple delegate is inlined resulting in similar - if not identical - generated code as my solution?
[/EDIT]

Richard Deeming 6-Jun-18 9:30am

The source of Array.ConvertAll[^] is similar, but I don't think delegates tend to get inlined.

Using Windbg to answer implementation questions for yourself (Can a Delegate Invocation be Inlined?) | Philosophical Geek[^]

Jochen Arndt 6-Jun-18 9:39am

Thank you again for the information.

I thought too much in the C++ direction where lambdas can be inlined by the compiler.

hamid18 6-Jun-18 10:36am

thank you :)

Richard MacCutchan · Accepted Answer · 2018-06-06T00:49:00

Solution 1

The BitConverter Class (System)[^] does not appear to have a method to do this for you. You will need to write your own.

Posted 6-Jun-18 0:49am

Richard MacCutchan

Comments

hamid18 6-Jun-18 9:12am

thanks.