Assign index value to bits in cyclic order

[patneel]

Hi,

I am working on implementing following logic

I am calculating index variable value based on length of my ciphertext.

Index Variable P=Mod(l,3) where l is length of ciphertext after converting it into binary

Say ciphertext is 11001011 01111010 10101010 10011001 01010101

This data is five bytes. So l=5 therefore p=2 ((Mod(l,3)) &

then I want to assign index variable to the bits of cipher text in cylic order based on calculated value of index variable

P=0 then
P=1 then
P=2 then after this again p=0

Bits IndexVariable,P
(11) 2
(00) 0
(10) 1
(11) 2
(01) 0
(11) 1
(10) 2
(10) 0
(10) 1
(10) 2
(10) 0
(10) 1

so on………

please provide me directions..

Thanks in Advance !!

[QuantumPete]

please provide me directions..

Post the code you have written so far with any questions we can answer.

[patneel]

Post the code you have written so far with any questions we can answer.

Hi,

I have posted my coding which was in matlab yesteday in another post "comple loop help" where i have posted my code..i am struggling in assigning index variable just to two bits of text which is in binary and repeating of cycle..i am not proficient in C but thought would get some direction to correct my matlab code

thanks..

[QuantumPete]

Um, so if you're not writing this program in C, why post in a C forum?

[patneel]

Um, so if you're not writing this program in C, why post in a C forum?

to call c program thro matlab..or will try to replicate same in matlab

[QuantumPete]

to call c program thro matlab..or will try to replicate same in matlab

So you want to write it first in C, then either call it from Matlab or re-implement in Matlab? If that's the case, show us what C code you've written so far and we'll... critique.