fixnum

Package Overview

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The fixnum package provides 32-bit and 64-bit signed fixed-width integer types that ensure consistent behavior across Dart's native and JavaScript runtimes. It addresses discrepancies in integer handling between platforms, particularly in web environments where JavaScript uses floating-point numbers for integers. This library is ideal for applications requiring predictable arithmetic and bitwise operations regardless of the execution environment.

Use cases

Cross-platform integer consistency
Web and native integer synchronization
Cryptographic operations
Network protocol implementations
Binary data processing
Low-level system programming

Key features

Fixed 32-bit and 64-bit integer types
Consistent overflow behavior
Bitwise operation support
JavaScript runtime compatibility
No external dependencies
Minimal performance overhead

Suitable for

Developers targeting multiple platforms
Applications requiring precise integer arithmetic
Systems programming in Dart
Interoperability with binary protocols
Projects needing deterministic integer behavior

Considerations

Not needed for basic integer use cases
May introduce slight overhead for simple operations
Requires explicit import for fixed-width types
Limited to signed integers only
Not suitable for arbitrary-precision arithmetic

Original README snapshot from the linked source repository. Visit the repository for the latest content.

Overview

This repository is home to various Dart packages under the dart.dev publisher.

Packages

Package	Description	Issues	Version
args	Library for defining parsers for parsing raw command-line arguments into a set of options and values using GNU and POSIX style options.
async	Utility functions and classes related to the 'dart:async' library.
characters	String replacement with operations that are Unicode/grapheme cluster aware.
collection	Collections and utilities functions and classes related to collections.
convert	Utilities for converting between data representations. Provides a number of Sink, Codec, Decoder, and Encoder types.
crypto	Implementations of SHA, MD5, and HMAC cryptographic functions.
fixnum	Library for 32- and 64-bit signed fixed-width integers with consistent behavior between native and JS runtimes.
lints	Official Dart lint rules. Defines the 'core' and 'recommended' set of lints suggested by the Dart team.
logging	Provides APIs for debugging and error logging, similar to loggers in other languages, such as the Closure JS Logger and java.util.logging.Logger.
os_detect	Platform independent OS detection.
path	A string-based path manipulation library.
platform	A pluggable, mockable platform information abstraction for Dart.
typed_data	Utility functions and classes related to the dart:typed_data library.