A pure-rust implementation of [zlib](https://www.zlib.net/manual.html).

This is a low-level implementation crate for use in libraries like `flate2` and `rustls`. For a more high-level interface, use [`flate2`](https://crates.io/crates/flate2).

For a [zlib](https://www.zlib.net/manual.html) -compatible rust api of this crate, see [`libz-rs-sys`](https://crates.io/crates/libz-rs-sys). For instructions on integrating zlib-rs into a C library, see [`libz-rs-sys-cdylib`](https://crates.io/crates/libz-rs-sys-cdylib).

## Example

```rust
use zlib_rs::ReturnCode;
use zlib_rs::{DeflateConfig, compress_bound, compress_slice};
use zlib_rs::{InflateConfig, decompress_slice};

let input = b"Hello World";

// --- compress ---
let mut compressed_buf = vec![0u8; compress_bound(input.len())];
let (compressed, rc) =
    compress_slice(&mut compressed_buf, input, DeflateConfig::default());
assert_eq!(rc, ReturnCode::Ok);

// --- decompress ---
let mut decompressed_buf = vec![0u8; input.len()];
let (decompressed, rc) =
    decompress_slice(&mut decompressed_buf, compressed, InflateConfig::default());
assert_eq!(rc, ReturnCode::Ok);

assert_eq!(decompressed, input);
```