Crc32 | Slice-by-16*2 and gcc 4

by Bulat-Ziganshin C++ Version: Slice-by-16 License: No License

X-Ray Key Features Code Snippets(4)Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | Crc32 Summary

Crc32 is a C++ library. Crc32 has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

Slice-by-16*2 and gcc 4.9.2 x64 allows to reach speed of 1 byte/cycle. A few most interestong results:. See full tests in the benchmark.txt. Also incorporated to

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Quality

Security

License

Reuse

Support

Crc32 has a low active ecosystem.

It has 7 star(s) with 1 fork(s). There are 3 watchers for this library.

It had no major release in the last 12 months.

Crc32 has no issues reported. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of Crc32 is Slice-by-16

Quality

Crc32 has no bugs reported.

Security

Crc32 has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

License

Crc32 does not have a standard license declared.

Check the repository for any license declaration and review the terms closely.

Without a license, all rights are reserved, and you cannot use the library in your applications.

Reuse

Crc32 releases are available to install and integrate.

Installation instructions are not available. Examples and code snippets are available.

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Get all kandi verified functions for this library.

Crc32 Key Features

No Key Features are available at this moment for Crc32.

Crc32 Examples and Code Snippets

default

C++

Lines of Code : 8

License : No License

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C:\Testing\Crc32>Crc32_vc2013_x64.exe
  8 bytes at once: CRC=00EE2DAA, 0.590s, 1736.712 MB/s
 16 bytes at once: CRC=00EE2DAA, 0.419s, 2441.144 MB/s

C:\Testing\Crc32>Crc32_gcc492_x64.exe
 8 bytes at once: CRC=00EE2DAA, 0.541s, 1892.791 MB/s
16

Calculate the CRC32 of a file .

python

Lines of Code : 22

License : Non-SPDX (Apache License 2.0)

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def file_crc32(filename, block_size=_DEFAULT_BLOCK_SIZE):
  """Get the crc32 of the passed file.

  The crc32 of a file can be used for error checking; two files with the same
  crc32 are considered equivalent. Note that the entire file must be read

Computes the CRC32 of the data .

java

Lines of Code : 13

License : Permissive (MIT License)

Copy

public static int crc32(byte[] data) {
        BitSet bitSet = BitSet.valueOf(data);
        int crc32 = 0xFFFFFFFF; // initial value
        for (int i = 0; i < data.length * 8; i++) {
            if (((crc32 >>> 31) & 1) != (bitSet.

Compute the crc32 of a string

java

Lines of Code : 3

License : Permissive (MIT License)

Copy

public static int crc32(String str) {
        return crc32(str.getBytes());
    }

Community Discussions

Trending Discussions on Crc32

DB2 encrypt field in select statement

Keep getting bpf: Failed to load program: Permission denied when trying to run eBPF code

How to get the openssl hash corresponding to Fiddler root certificate

Django can't connect to MariaDB instance with Docker

How to copy a terminal output and put it into the file?

Having trouble stopping U-Boot autoboot

What is the shortest hash with Nodejs crypto

python run multiple lines on multiple regex

Serialiazation of pytorch state_dict changes after loading into new model instance

AWS APIgateway Response mapping

QUESTION

DB2 encrypt field in select statement

Asked 2021-Jun-10 at 15:48

So I need to do a select statement, while encrypting a field in SHA2_512. I'm not sure which DB2 version it is, but I tried both queries and neither work.

When trying this query:

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ANSWER

Answered 2021-Jun-10 at 15:28

You appear to be using Db2-v11 for Z/OS "DSN11015" in V11 compatibility mode.

This version lacks the scalar function HASH_SHA256 (and others) which is present in Db2-v12 for z/OS. That is the reason you get sqlcode -440 (no such function HASH...) with your Db2-for-z/os version.

At Version-11 , IBM documents a function ENCRYPT_TDES which may help you.

Background information on using this function.

You can write your own functions if you have the skills.

Source https://stackoverflow.com/questions/67923169

QUESTION

Keep getting bpf: Failed to load program: Permission denied when trying to run eBPF code

Asked 2021-May-24 at 21:45

Sorry, I am really new to writing eBPF code, so I came upon an error that I can't seem to shake off. Running in sudo does not seem to help. And I wrote a slower crc32 program that compiles but this one does not want to execute no matter what. I am wondering if I'm breaking any convention that I am just not seeing.

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ANSWER

Answered 2021-May-24 at 21:44

From the verifier's logs, you have some invalid access here:

Source https://stackoverflow.com/questions/67679109

QUESTION

How to get the openssl hash corresponding to Fiddler root certificate

Asked 2021-May-07 at 16:35

I'm using OpenSsl for windows.
I want to get the certificate hash associated with Fiddler's root certificate that I downloaded from:
http://ipv4.fiddler:8888/

So I'm executing from the command-line:

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ANSWER

Answered 2021-May-07 at 16:35

PEM is not just for emails, it is the file format (see wikipedia).

The FiddlerRoot.cer must be converted to .pem format before calculating the hash:

Source https://stackoverflow.com/questions/67434455

QUESTION

Django can't connect to MariaDB instance with Docker

Asked 2021-May-06 at 15:45

I am getting the following error: (2002, "Can't connect to MySQL server on 'db' (115)"), when trying to use the Django admin dashboard (or running migrations or anything that connects to the DB).

This is my docker-compose.yml:

...

ANSWER

Answered 2021-Apr-13 at 20:52

As the error message says, the mysql command is trying to connect to a socket file at /run/mysqld/mysqld.sock. But the MariaDB server in Docker is not configured to expose that file. You need to use the -H localhost option to tell it where to connect to. That way it will actually connect to the TCP/IP socket instead of the filesystem one.

Source https://stackoverflow.com/questions/67079347

QUESTION

How to copy a terminal output and put it into the file?

Asked 2021-Apr-30 at 23:28

So how can I copy the terminal output and tell a program to save the output to the file? The function below generates the file and make an output as terminal. What I want to do is to save this terminal output to the file, how can I do this? Is there a better way of doing it?

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ANSWER

Answered 2021-Apr-30 at 23:28

The write!() macro can write on any type, as long as it implements std::io::Write. Just open a std::fs::File in write mode and write!() to it instead of stdout.

Source https://stackoverflow.com/questions/67338190

QUESTION

Having trouble stopping U-Boot autoboot

Asked 2021-Apr-22 at 15:51

Background:

I have an old Seagate BlackArmor NAS 110 that I'm trying to install Debian on by following the instructions here: https://github.com/hn/seagate-blackarmor-nas.

I have a couple of USB to TTL serial adapters (one FTDI chipset and the other Prolific) that I've tried and have run into the same issue with both. I have made the connection to the serial port on the board of the NAS using a multimeter to make sure I've gotten the pinout correct.

Problem:

I'm not able to stop the autoboot process by pressing keys and any point during the boot process. The device also does not seem to respond to any keystrokes although they are echoed back.

What I've Tried So Far:

Using USB to TTL serial adapters with two different chipsets
Using the adapters on two different computers (MacBook Pro and a ThinkPad)
Using different operating systems (MacOS, Windows 10, Ubuntu 20.04)
Using different terminal programs (Screen, Minicom, Putty)
Turned off hardware and software flow control
Tested output of adapters by shorting RX and TX pins and seeing keystrokes echoed back
Commands seem to be sent to device as when I type I see my commands echoed back (not sure if this is supposed to happen)

I've been at this for a few days and can't figure it out. I've also recorded my screen while experiencing the issue: https://streamable.com/xl43br. Can anyone see where I'm going wrong?

Terminal output while experiencing the problem:

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ANSWER

Answered 2021-Apr-22 at 15:51

So it turns out there is a short somewhere between the RX pin and the +3.3V pin which is not allowing me to send anything to the board. Thank you to those who have commented.

Source https://stackoverflow.com/questions/67169585

QUESTION

What is the shortest hash with Nodejs crypto

Asked 2021-Apr-13 at 11:18

What is the shortest string hash algo in the nodejs crypto module? Is there anything similar to crc32, which produces 8-character string , but unfortunately is not natively supported by crypto (I know that there are external modules, but I'm limited to built-in crypto). Hash collision probabilities is not important for my application (cache bursting).

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ANSWER

Answered 2021-Apr-13 at 11:18

You can use a XOF hash function like shake256 which supports the outputLength option (in bytes):

Source https://stackoverflow.com/questions/67070588

QUESTION

python run multiple lines on multiple regex

Asked 2021-Apr-08 at 17:23

I have a folder that need to contain certain files that contains magic in their name so i have a list of all the files with os.listdir(sstable_dir_path) and i have a list of regexes that one of them supposed to match one of those filenames. is there any way to do so without a nested for?

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ANSWER

Answered 2021-Apr-07 at 14:54

files = ['md-146-big-CompressionInfo.db', 
         'md-146-big-Data.db', 
         'md-146-big-Digest.crc32', 
         'md-146-big-Filter.db', 
         'md-146-big-Index.db', 
         'md-146-big-Statistics.db', 
         'md-146-big-Summary.db', 
         'md-146-big-TOC.txt']
pattern = '|'.join(map(lambda x: x.pattern, SSTABLE_FILENAMES_REGEXES))
res = [fillename for fillename in files.split() if re.fullmatch(pattern=pattern , string=fillename) ]

print(res)

Source https://stackoverflow.com/questions/66988288

QUESTION

Serialiazation of pytorch state_dict changes after loading into new model instance

Asked 2021-Mar-30 at 19:20

Why do the bytes obtained from serializing pytorch state_dicts change after loading the a state_dict into a new instance of the same model architecture?

Have a look:

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ANSWER

Answered 2021-Mar-30 at 19:20

This might be because pickle is not expected to produce a repr suitable for hashing (See Using pickle.dumps to hash mutable objects). It might be a better idea to compare keys, and then compare tensors stored in the dict-keys for equality/closeness.

Below is a rough implementation of that idea.

Source https://stackoverflow.com/questions/66860645

QUESTION

AWS APIgateway Response mapping

Asked 2021-Mar-25 at 13:32

I have an API Gateway integration, where the data directly goes to dynamodb. The x-amazon-apigateway-integration has response code mappings defined, so my intention is to get the similar response code thrown from dynamodb on my client side.

My apigateway-integration response code mapping is as shown below.

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ANSWER

Answered 2021-Mar-25 at 13:32

In case any one wondering the same, its not the SelectionPattern that worked for me, but the Response status pattern property, more details here.

Source https://stackoverflow.com/questions/66750646

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install Crc32

You can download it from GitHub.

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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