dashu

A library set of arbitrary precision numbers (aka. big numbers) implemented in Rust. It's intended to be a Rust native alternative to GNU GMP + MPFR (+ MPC in future). It features:

• Pure rust, full no_std support.
• Focus on ergonomics & readability, and then efficiency.
• Optimized speed and memory usage.
• Current MSRV is 1.68.

Sub-crates

• dashu-base: Common trait definitions
• dashu-int: Arbitrary precision integers
• dashu-float: Arbitrary precision floating point numbers
• dashu-ratio: Arbitrary precision rational numbers
• dashu-cmplx: Arbitrary precision complex numbers
• dashu-macros: Macros for creating big numbers

dashu is a meta crate that re-exports all the types from these sub-crates. Please see the README.md in each subdirectory for crate-specific introduction.

Python package

dashu-python is a user-friendly test field for the core dashu functionalities: through the dashu-rs package on PyPI, users can try dashu's arbitrary-precision integers, rationals, floats, and complex numbers from Python to get an idea of what dashu is capable of — no Rust toolchain needed. Beyond exploring dashu, it also stands on its own as a standalone arbitrary-precision number package for the Python ecosystem.

License

Licensed under either of

• Apache License, Version 2.0 (LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or https://opensource.org/licenses/MIT)

at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.