crclib 1.0.1

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Dart crclib #

This is not an official Google product.

Generic CRC calculations as Dart converters and some common algorithms.

The easiest way to use this library is to call convert on the instance of the desired CRC routine.

  new Crc32Zlib().convert(UTF8.encode('123456789')) == 0xCBF43926

Another supported use case is as stream transformers.

  new File(...).openRead().transform(new Crc32Zlib()).single.then(...)

Instead of using predefined classes, it is also possible to construct a customized CRC function with ParametricCrc class. For a list of known CRC routines, check out


  1. inputReflected and outputReflected can be different, see CRC-12/UMTS.
  2. Bit-level checksums (including non-multiple-of-8 checksums).

1.0.1 - 2018-09-21

  • Support both Dart 1 and Dart 2.

1.0.0 - 2017-04-20

  • First release.

Use this package as a library

1. Depend on it

Add this to your package's pubspec.yaml file:

  crclib: ^1.0.1

2. Install it

You can install packages from the command line:

with pub:

$ pub get

with Flutter:

$ flutter pub get

Alternatively, your editor might support pub get or flutter pub get. Check the docs for your editor to learn more.

3. Import it

Now in your Dart code, you can use:

import 'package:crclib/crclib.dart';
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Learn more about scoring.

We analyzed this package on Jul 2, 2020, and provided a score, details, and suggestions below. Analysis was completed with status completed using:

  • Dart: 2.8.4
  • pana: 0.13.9+1

Health suggestions

Fix lib/crclib.dart. (-2.96 points)

Analysis of lib/crclib.dart reported 6 hints, including:

line 232 col 7: Unnecessary new keyword.

line 252 col 17: Unnecessary new keyword.

line 262 col 24: Unnecessary new keyword.

line 273 col 13: Unnecessary new keyword.

line 276 col 13: Unnecessary new keyword.

Maintenance suggestions

Package is getting outdated. (-77.81 points)

The package was last published 92 weeks ago.

Maintain an example. (-10 points)

Create a short demo in the example/ directory to show how to use this package.

Common filename patterns include main.dart, example.dart, and crclib.dart. Packages with multiple examples should provide example/

For more information see the pub package layout conventions.

The package description is too short. (-7 points)

Add more detail to the description field of pubspec.yaml. Use 60 to 180 characters to describe the package, what it does, and its target use case.


Package Constraint Resolved Available
Direct dependencies
Dart SDK >=1.20.0 <3.0.0
meta >=1.0.2 <2.0.0 1.1.8 1.2.0
tuple >=1.0.0 <2.0.0 1.0.3
Transitive dependencies
matcher 0.12.8
path 1.7.0
quiver 2.1.3
stack_trace 1.9.5
Dev dependencies
benchmark_harness >=1.0.0 <2.0.0
dart2_constant >=1.0.1 <2.0.0
test >=0.12.20 <2.0.0