Package description
The crc npm package is used for generating cyclic redundancy check (CRC) codes for various input data. CRC is a popular method for detecting accidental changes to raw data in digital networks and storage devices. The package supports multiple CRC algorithms and can be used in various applications where data integrity is crucial.
CRC32 Calculation
This feature allows the calculation of CRC32 checksum for the input string 'hello world'. It is useful for verifying the integrity of strings or files.
const crc = require('crc');
const result = crc.crc32('hello world');
console.log('CRC32:', result);CRC16 Calculation
This feature computes the CRC16 checksum for the given string. It's commonly used in telecommunications and storage for error-checking.
const crc = require('crc');
const result = crc.crc16('hello world');
console.log('CRC16:', result);CRC1 Calculation
This feature calculates a simple CRC1 checksum, which can be used for basic error detection in scenarios where minimal data corruption checks are needed.
const crc = require('crc');
const result = crc.crc1('hello world');
console.log('CRC1:', result);The crc32 package is similar to crc in that it provides CRC32 checksum calculations. However, it focuses solely on CRC32, whereas crc supports multiple algorithms including CRC1, CRC8, CRC16, and others, making crc more versatile.
buffer-crc32 is another npm package that offers CRC32 checksum calculations. It is designed to work specifically with Node.js buffers. Compared to crc, buffer-crc32 is more specialized for buffer data types while crc offers broader functionality with support for strings and other data types.
Readme
Module for calculating Cyclic Redundancy Check (CRC).
pycrc implementation.crc.crc1(…)crc.crc8(…)crc.crc81wire(…)crc.crc16(…)crc.crc16ccitt(…)crc.crc16modbus(…)crc.crc24(…)crc.crc32(…)If you've used crc module prior to version 2.x, you might have some inconsistentcies with the current implementation because it relied on very old code and wasn't checked against reference implementation. If you upgrading from 1.x, please take special care.
Please support me on GitTip. I've spend days developing and grooming this module and hope to spend more time. If you have bitcoin, please use the QR code or this wallet address 1CZyBREeHTmy8C5zVGHZHPwqBuWFmEuUCQ:
npm install crc
$ npm install
$ npm test
Calculate a CRC32:
var crc = require('crc');
crc.crc32('hello').toString(16);
# => "3610a686"
Calculate a CRC32 of a file:
crc.crc32(fs.readFileSync('README.md', 'utf8')).toString(16);
# => "127ad531"
Or using a Buffer:
crc.crc32(fs.readFileSync('README.md')).toString(16);
# => "127ad531"
Incrementally calculate a CRC32:
value = crc32('one');
value = crc32('two', value);
value = crc32('three', value);
value.toString(16);
# => "09e1c092"
pycrc library is which the source of all of the CRC tables.
The MIT License (MIT)
Copyright (c) 2014 Alex Gorbatchev
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
FAQs
Module for calculating Cyclic Redundancy Check (CRC) for Node.js and the browser.
We found that crc demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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