How can I concatenate upper and lower nibbles stored sequentially in an array?

Posted by Abhijit Kumar on Stack Overflow See other posts from Stack Overflow or by Abhijit Kumar
Published on 2009-01-09T10:14:42Z Indexed on 2010/03/15 8:49 UTC
Read the original article Hit count: 300

Filed under:

c

|

bit-shift

|

arrays

Hi friends,

I have an array which contains a list of nibbles:

{0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, ...}

I want to combine adjacent nibbles into single bytes by left-shifting the upper nibble and concatenating it with the lower one. The output should look as follows:

{0xab, 0xcd, 0xef, ...}

How can I accomplish this in C?

Related posts about bit-shift

Java bitshift strangeness

as seen on Stack Overflow - Search for 'Stack Overflow'
Java has 2 bitshift operators for right shifts: >> shifts right, and is dependant on the sign bit for the sign of the result >>> shifts right and shifts a zero into leftmost bits http://java.sun.com/docs/books/tutorial/java/nutsandbolts/op3.html This seems fairly simple, so can… >>> More
Bitshift in javascript

as seen on Stack Overflow - Search for 'Stack Overflow'
I've got a really big number: 5799218898. And want to shift it right to 13 bits. So, windows-calculator or python gives me: 5799218898 13 | 100010100100001110011111100001 13 70791 | 10001010010000111 As expected. But Javascript: 5799218898 13 | 100010100100001110011111100001 … >>> More
Bit shift and pointer oddities in C, looking for explanations

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi all, I discovered something odd that I can't explain. If someone here can see what or why this is happening I'd like to know. What I'm doing is taking an unsigned short containing 12 bits aligned high like this: 1111 1111 1111 0000 I then want to shif the bits so that each byte in the short hold… >>> More
Learning about C Bitshift Operators

as seen on ASP.net Weblogs - Search for 'ASP.net Weblogs'
So I was doing some reading tonight on my Nerdkit , I had planned to actually do some playing around with it, but decided just to read a bit. I’ve never coded in C, I did C++ in College (not very well) and do most of my development in C# these days (when I’m doing code, mostly for fun). While all… >>> More
Implementing a bit shift using AND, NOT, ADD [closed]

as seen on Programmers - Search for 'Programmers'
I'm implementing a 16-bit left bit shift by r bits, and I only have access to AND, NOT and ADD. There are 3 condition codes, negative, zero and positive, which are set when you use any of these operations. How I went about it was : (1) And the number with 1000 0000 0000 0000 to set condition codes… >>> More

Developer IT

How can I concatenate upper and lower nibbles stored sequentially in an array? - Developer IT

How can I concatenate upper and lower nibbles stored sequentially in an array?

c

bit-shift

arrays

Related posts about c

Related posts about bit-shift

Java bitshift strangeness

Bitshift in javascript

Bit shift and pointer oddities in C, looking for explanations

Learning about C Bitshift Operators

Implementing a bit shift using AND, NOT, ADD [closed]

Categories cloud