rust-postal

Bindings to the libpostal street address parsing/normalization C library.

This library provides rust-lang/rust-bindgen generated Rust <-> C bindings, and puts an ergonomic and safe Rust API on top of them.

Installation

Follow the README instructions at openvenues/libpostal to install the shared library for your platform. Currently, the compiled object is dynamically linked when your project runs - static linkage could be supported in the future.

Add postal to your Cargo.toml:

Add this to your Cargo.toml: [dependencies] postal = "0.2"

Next, add this to your crate: extern crate postal;

Usage example (expand_address)

Note: libpostal is not threadsafe. As a result, do not create more than one postal::Context per process. Context::expand_address and Context::parse_address do internal locking, and are safe to call concurrently.

This is an example of using the expand_address API:

```rust extern crate postal; use postal::{Context, InitOptions, ExpandAddressOptions};

// initialize a context to work with let mut ctx = Context::new();

// enable address expansion for this context ctx.init(InitOptions{expand_address: true}).unwrap();

// these options are safe to persist and reuse between calls to expand_address let mut opts = ExpandAddressOptions::new();

// (optional) set languages; this can improve runtime performance significantly, approximately 30% in benchmarks opts.setlanguages(vec!["en"].asslice());

// expand a single address into a postal::Expansions iterator let exps = ctx.expand_address( "1234 Cherry Ln, Podunk TX", &mut opts) .unwrap(); for e in exps { dbg!(e); } ```

This is how you might use the parse_address API:

```rust extern crate postal; use postal::{Context, InitOptions, ParseAddressOptions};

// initialize a context to work with let mut ctx = Context::new();

// enable address parsing for this context ctx.init(InitOptions{parse_address: true}).unwrap();

// these options are safe to persist and reuse between calls to parse_address. // Note: language and country are technically options that libpostal will accept // for purposes of parsing addresses, but it ignores them at present. let mut opts = ParseAddressOptions::new();

// parse a single address into a postal::Components iterator let comps = ctx.parse_address( "1234 Cherry Ln, Podunk TX", &mut opts) .unwrap(); for c in comps { dbg!(c); } ```

For more examples and usage, please refer to the tests or benchmarks.

Development setup

This will build bindgen bindings, run the tests, and run the benchmarks.

sh cargo build cargo test -- --nocapture --test-threads 1 cargo bench

Note: --test-threads 1 is required due to the single-threaded nature of libpostal.

Release History

0.2.0
- Added parse_address support.
0.1.0
- Initial release

Contributing