# Rust low-level bindings for GMPMEE
The `gmpmee-sys` crate provides Rust FFI bindings to the [GMP Modular Exponentiation Extension (GMPMEE)](https://github.com/verificatum/verificatum-gmpmee), which is a minor extension of [GMP](https://gmplib.org/). It adds simultaneous modular exponentiation and fixed base modular exponentiation functionality to the set of integer functions (the mpz-functions), as well as special purpose primality testing routines.
The crate is strongly inspired from [gmp-mpfr-sys](https://crates.io/crates/gmp-mpfr-sys). In particular the file `build.rs` is copied from this crate, and adapted to the needs of the `gmpmee-sys` crate. No cache is implemented, since the compilation is quick.
## Types
Unlike in the C libraries, the types (e.g. `gmpmee_spowm_tab`, `gmpmee_fpowm_tab`) are defined directly as structs, not as single-element
arrays.
## Using gmpmee-sys
The gmpmee-sys crate is available on crates.io. To use gmpmee-sys in your crate, add it as a dependency inside [*Cargo.toml*]:
```toml
[dependencies]
gmpmee-sys = "0.1"
```
## Building on GNU/Linux
To build on GNU/Linux, simply make sure you have `diffutils`, `gcc`,
`make`, `autoconf`, `libtool`, `m4` and `gmp` installed on your system. For example on Debian:
```sh
sudo apt update
sudo apt install diffutils gcc make m4 autoconf libtool libgmp3-dev
```
## Building on macOS
To build on macOS, you need the command-line developer tools. To
install them, run the following command in a terminal:
```sh
xcode-select --install
```
## Building on Windows
Actually the crate is not working for Windows
## Licence
The gmpee-sys crate is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. See the full text of the [LICENSE](LICENSE.md) for details.