crc-64 | little utility to calculate the CRC64 checksum

by MrBuddyCasino Java Version: Current License: No License

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kandi X-RAY | crc-64 Summary

crc-64 is a Java library. crc-64 has no vulnerabilities and it has low support. However crc-64 has 1 bugs and it build file is not available. You can download it from GitHub, Maven.

This a little utility to calculate the CRC64 checksum, using the ECMA polynom. The original code is by Roman Nikitchenko (roman@nikitchenko.dp.ua), posted on StackOverflow. The nifty trick here is that it is using a nested lookup table design invented by Mark Adler for increased performance, with performance tuned bitwise-ops to keep the amount of instructions per byte as low as possible. So how fast is it you ask?. On my 2,3 GHz i7 MBP, I got 1150 MB/s using Java 8. The non-optimized version peaked at 375 MB/s, so thats about 3x faster. The Jar is available via Maven Central: net.boeckling:crc-64:1.0.0.

Support

Quality

Security

License

Reuse

Support

crc-64 has a low active ecosystem.

It has 8 star(s) with 4 fork(s). There are no watchers for this library.

It had no major release in the last 6 months.

crc-64 has no issues reported. There are 1 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of crc-64 is current.

Quality

crc-64 has 1 bugs (0 blocker, 1 critical, 0 major, 0 minor) and 17 code smells.

Security

crc-64 has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

crc-64 code analysis shows 0 unresolved vulnerabilities.

There are 1 security hotspots that need review.

License

crc-64 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

crc-64 releases are not available. You will need to build from source code and install.

Deployable package is available in Maven.

crc-64 has no build file. You will be need to create the build yourself to build the component from source.

It has 450 lines of code, 23 functions and 3 files.

It has high code complexity. Code complexity directly impacts maintainability of the code.

Top functions reviewed by kandi - BETA

kandi has reviewed crc-64 and discovered the below as its top functions. This is intended to give you an instant insight into crc-64 implemented functionality, and help decide if they suit your requirements.

Combine two blocks
2
Convert a square matrix to a square matrix
Get the CRC64 value
Calculate the CRC64 of the given file
Updates the CRC64 with the given byte array
Calculate the CRC64 of the given InputStream

Get all kandi verified functions for this library.

crc-64 Key Features

No Key Features are available at this moment for crc-64.

crc-64 Examples and Code Snippets

No Code Snippets are available at this moment for crc-64.

Community Discussions

Trending Discussions on crc-64

Most efficent way to calculate CRC64 with reflected input

QUESTION

Most efficent way to calculate CRC64 with reflected input

Asked 2020-Feb-18 at 17:23

I need to calculate a CRC-64 using this setup into this wonderful website: http://www.sunshine2k.de/coding/javascript/crc/crc_js.html

As you can see I require "input reflected" and that means that I need to reverse the bit order of any byte (a bit annoying). For the moment, I implemented this with a lookup table (for example 0x55 -> 0xAA), but I was wondering if there is any property of CRC which can be used to be more efficient.

This is my code (in C):

...

ANSWER

Answered 2020-Feb-17 at 21:44

actually I'm wondering if some properties of CRC allow me to get the same result using reflected table, opposite shifting, reciprocal / reverse polynomial... etc. That would let skip the step of reversing bits.

There is such a property, and you only need one reverse, in the end. The whole logic of the CRC can be bit-reversed*, so that the bits stream the opposite way and don't need to be reversed during the calculation itself:

Source https://stackoverflow.com/questions/60270174

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

Vulnerabilities

No vulnerabilities reported

Install crc-64

You can download it from GitHub, Maven.
You can use crc-64 like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the crc-64 component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .

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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