141 questions
5
votes
2
answers
91
views
How do I decode a bit string representing a n-digit number, where the 'n' digits were grouped and encoded in bit words of different lengths?
Background
I am trying to decode a bitstring from a QR-Code, where the data was encoded in numeric mode. According to this QR-Code tutorial: https://www.thonky.com/qr-code-tutorial/numeric-mode-...
1
vote
0
answers
78
views
ProVerif error : bitstring comparison and type mismatch in XOR function
I'm using ProVerif 2.05 for modeling cryptographic protocols, but I'm running into errors when performing bitwise operations with the XOR function.
The error tells me that I have a type mismatch when ...
- 11
2
votes
3
answers
133
views
Bounds checking a float from only an unsigned bit string
I am trying to return the result of casting a single precision float to an int just from its bit string. I correctly grab the sign bit, exponent and mantissa from the bit string but I am unsure how to ...
- 115
-1
votes
1
answer
189
views
Determine whether you can reach bitstring B from bitstring A using specific operations
The question is, given two bitstrings A and B, determine whether you can reach B from A using the following operation:
Choose two indices i,j such that the values at both indices are the same, and the ...
- 27
2
votes
1
answer
500
views
Convert a binary string of 0s and 1s to a bitstring in elixir
Given a string such as "0110", how do I convert this to a bitstring containing the binary values represented by the string?
I checked the Base module, but it's based on RFC 4648 and is not ...
- 23.3k
-2
votes
1
answer
70
views
using 8-bit binary response of a hardware
I have a piece of hardware that for instance returns the "response" below. Per the instructions, I would like to separate the response to the 1st and last 4 bits. But the lower bit response ...
2
votes
1
answer
47
views
Why is the first argument of child's constructor being used in parent's constructer when inheriting `bitstring.BitArray`?
I want my class to inherit the BitArray class but I'm running into a problem in the constructors. I have several positional and keyword arguments I want to use in the child but the first positional ...
- 31
2
votes
2
answers
192
views
Python efficient assigning of even and odd bits to a bitstring/bit_array
I receive serialized DDR data from a setup with 8 chips. Due to the way the readout is implemented in hardware, the data that is received by the computer has the following structure:
bits 0 and 1 of ...
1
vote
2
answers
1k
views
How can I convert a bitstring to the binary form in Julia
I am using bitstring to perform an xor operation on the ith bit of a string:
string = bitstring(string ⊻ 1 <<i)
However the result will be a string, so I cannot continue with other i.
So I want ...
2
votes
4
answers
531
views
Nonzero for integers
My problem is as follows. I am generating a random bitstring of size n, and need to iterate over the indices for which the random bit is 1. For example, if my random bitstring ends up being 00101, I ...
- 153
1
vote
0
answers
32
views
Modified Zeckendorf represention
Given x as searched integer and k as minimum zeros between 2 ones.
Example:
x := 7,k := 0
Binary represention: 111
x := 7,k := 1
Binary represention: 1010
x := 7,k := ?(>1)
Binary represention: ?
...
- 608
0
votes
0
answers
47
views
how to find identical bitposition in a string in python
create a circuit of 5 qubits
qr = QuantumRegister(5, "qr") # quantum bit register
cr = ClassicalRegister(5, "cr") # classical bit register
circuit = QuantumCircuit(qr, cr)
# all ...
1
vote
0
answers
43
views
How to find identical bitposition in a string?
I have created a sequence of bitstring. Now I want to calculate the identical bit positions all sequences one by one.
I don't understand how to find it.
S1: ...
1
vote
0
answers
3k
views
How to import already installed python module "bitstring"
I'm on Windows and working on a python file from a cloned gitHub repository. When trying to do
import bitstring as bs
I get this error:
ModuleNotFoundError: No module named 'bitstring'
But "pip ...
- 123
0
votes
1
answer
420
views
How do I turn a file into a RAW bitstring?
How do I read a file and turn it to a RAW bit string? For example I open an image that is 512kb, It reads the file byte by byte, and it spits out the long bit string that is the file? I would like to ...
