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-"checksum xoroshiro128 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "e0eeda34baec49c4f1eb2c04d59b761582fd6330010f9330ca696ca1a355dfcd"
+ "rand 0.4.6",
+]
diff --git a/Cargo.toml b/Cargo.toml
index 5943e20..ddbb135 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,5 +1,5 @@
 [package]
-name = "lzjd"
+name = "lzjd-bin"
 version = "0.2.0"
 authors = ["Henk Dieter <henkdieter@tweedegolf.com>"]
 edition = "2018"
@@ -11,22 +11,16 @@ categories = ["algorithms","compression","cryptography","filesystem","science"]
 license = "GPL-3.0"
 repository = "https://github.com/tweedegolf/lzjd-rs"
 
+[workspace]
+members = [".", "lib"]
+
 [dependencies]
-clap = "2.32.0"
+lzjd = { path = "./lib" }
 base64 = "0.10.1"
+bincode = "1.1.2"
+clap = "2.32.0"
 failure = "0.1.5"
 failure_derive = "0.1.5"
-fasthash= "0.4.0"
-bincode = "1.1.2"
-crc = "1.8.1"
-walkdir = "2.2.7"
 num_cpus = "1.10.0"
 rayon = "1.0.3"
-
-[dev-dependencies]
-rand = "0.6.5"
-criterion = "0.2.10"
-
-[[bench]]
-name = "lzjd"
-harness = false
+walkdir = "2.2.7"
diff --git a/README.md b/README.md
index 1e33333..ddb8b7c 100644
--- a/README.md
+++ b/README.md
@@ -5,13 +5,14 @@
 Rust implementation of Lempel-Ziv Jaccard Distance (LZJD) algorithm based on [jLZJD](https://github.com/EdwardRaff/jLZJD)
 
 Main differences:
+
 - Rust instead of Java
 - Can use any hasher (executable uses CRC32) instead of just Murmur3
 - Does not allocate memory for every unique hash, instead keeps k=1024 smallest
-- Based on Vec<u64> instead of IntSetNoRemove, which is more like HashMap
+- Based on `Vec<u64>` instead of IntSetNoRemove, which is more like HashMap
 - Hash files are considerably smaller if small sequences have been digested
 
-```
+```man
 USAGE:
     lzjd [FLAGS] [OPTIONS] <INPUT>...
 
@@ -30,8 +31,7 @@ ARGS:
     <INPUT>...    Sets the input file to use
 ```
 
-
 See also:
 
 - [Original paper](http://www.edwardraff.com/publications/alternative-ncd-lzjd.pdf)
-- [Follow-up paper](https://arxiv.org/abs/1708.03346)
\ No newline at end of file
+- [Follow-up paper](https://arxiv.org/abs/1708.03346)
diff --git a/lib/Cargo.toml b/lib/Cargo.toml
new file mode 100644
index 0000000..feb9f3d
--- /dev/null
+++ b/lib/Cargo.toml
@@ -0,0 +1,35 @@
+[package]
+name = "lzjd"
+version = "0.2.0"  # !!! needs a major bump
+authors = ["Henk Dieter <henkdieter@tweedegolf.com>"]
+edition = "2018"
+exclude = ["in/*", "out/*"]
+description = "Rust implementation of the LZJD algorithm (https://github.com/EdwardRaff/jLZJD)"
+readme = "README.md"
+keywords = ["lzjd", "edit", "distance", "Lempel", "Ziv"]
+categories = ["algorithms","compression","cryptography","filesystem","science"]
+license = "GPL-3.0"
+repository = "https://github.com/tweedegolf/lzjd-rs"
+
+[dependencies]
+hashbrown = "0.9.1"
+crc = { version = "1.8.1", default-features = false }
+base64 = { version = "0.10.1", default-features = false }
+
+# fasthash is mostly written in C with a FFI
+# a pure Rust alternative is https://github.com/stusmall/murmur3, which
+# still needs std by default, but can be easily patched
+fasthash = "0.4.0"
+
+bincode = "1.1.2" # no_std is a WIP, keep an eye on https://github.com/bincode-org/bincode/pull/339
+
+failure = "0.1.5" # deprecated; switch dependency
+failure_derive = "0.1.5"
+
+[dev-dependencies]
+criterion = "0.3.4"
+rand = "0.8.3"
+
+[[bench]]
+name = "lzjd"
+harness = false
diff --git a/benches/lzjd.rs b/lib/benches/lzjd.rs
similarity index 100%
rename from benches/lzjd.rs
rename to lib/benches/lzjd.rs
diff --git a/src/crc32.rs b/lib/src/crc32.rs
similarity index 94%
rename from src/crc32.rs
rename to lib/src/crc32.rs
index 3530490..5609596 100644
--- a/src/crc32.rs
+++ b/lib/src/crc32.rs
@@ -1,9 +1,7 @@
 //! Defines a wrapper around crc::crc32::Digest, implementing std::hash::Hasher
 //! as well as a std::hash::BuildHasher which builds the hasher.
 use crc::crc32::{self, Hasher32};
-
-use std::hash::BuildHasher;
-use std::hash::Hasher;
+use core::hash::{Hasher, BuildHasher};
 
 /// Wrapper around crc::crc32::Digest which implements std::hash::Hasher
 pub struct CRC32Hasher {
@@ -39,4 +37,3 @@ impl BuildHasher for CRC32BuildHasher {
         CRC32Hasher::new()
     }
 }
-
diff --git a/src/lib.rs b/lib/src/lib.rs
similarity index 92%
rename from src/lib.rs
rename to lib/src/lib.rs
index aca5825..536cf3f 100644
--- a/src/lib.rs
+++ b/lib/src/lib.rs
@@ -52,12 +52,19 @@
 //!
 //! assert_eq!(lzjd, 0.5714285714285714);
 //! ```
-
+#![no_std]
+extern crate alloc;
+extern crate hashbrown;
 #[macro_use]
 extern crate failure_derive;
+extern crate base64;
+extern crate bincode;
+extern crate fasthash;
+
+
+use alloc::string::{String, ToString};
 
 pub use crate::lz_dict::LZDict;
-use std::io;
 
 /// LZ dictionary implementation
 pub mod lz_dict;
@@ -68,11 +75,6 @@ pub mod murmur3;
 
 #[derive(Debug, Fail)]
 pub enum LZJDError {
-    #[fail(display = "IO error: {}", err)]
-    Io {
-        #[cause]
-        err: io::Error,
-    },
     #[fail(display = "Decode error: {}", err)]
     Base64 {
         #[cause]
@@ -99,27 +101,21 @@ impl From<bincode::Error> for LZJDError {
     }
 }
 
-impl From<std::io::Error> for LZJDError {
-    fn from(err: std::io::Error) -> Self {
-        LZJDError::Io { err }
-    }
-}
-
 impl<'a> From<&'a str> for LZJDError {
     fn from(msg: &'a str) -> Self {
         LZJDError::Msg {
-            msg: msg.to_owned(),
+            msg: msg.to_string(),
         }
     }
 }
 
-pub type Result<T> = std::result::Result<T, LZJDError>;
+pub type Result<T> = core::result::Result<T, LZJDError>;
 
 #[cfg(test)]
 mod tests {
     use crate::crc32::CRC32BuildHasher;
     use crate::*;
-    use std::f64::EPSILON;
+    use core::f64::EPSILON;
 
     #[test]
     fn test_optimized_dist() {
diff --git a/src/lz_dict.rs b/lib/src/lz_dict.rs
similarity index 98%
rename from src/lz_dict.rs
rename to lib/src/lz_dict.rs
index e9867da..0e09289 100644
--- a/src/lz_dict.rs
+++ b/lib/src/lz_dict.rs
@@ -1,8 +1,10 @@
 use crate::Result;
-use core::hash::BuildHasher;
-use core::hash::Hasher;
+use core::hash::{Hasher, BuildHasher};
 use core::ops::Deref;
-use std::collections::HashSet;
+use alloc::vec;
+use alloc::vec::Vec;
+use alloc::string::String;
+use hashbrown::HashSet;
 
 /// A sorted list of the k smallest LZSet hashes
 #[derive(Debug)]
@@ -185,8 +187,7 @@ impl From<LZDict> for Vec<i32> {
 mod tests {
     use crate::crc32::CRC32BuildHasher;
     use crate::lz_dict::LZDict;
-    use std::f64::EPSILON;
-    use std::iter::*;
+    use core::f64::EPSILON;
 
     fn is_sorted_and_unique<T: PartialOrd>(list: &[T]) -> bool {
         if list.len() <= 1 {
diff --git a/src/murmur3.rs b/lib/src/murmur3.rs
similarity index 91%
rename from src/murmur3.rs
rename to lib/src/murmur3.rs
index d4d6ad4..c86bde0 100644
--- a/src/murmur3.rs
+++ b/lib/src/murmur3.rs
@@ -1,5 +1,5 @@
 use fasthash::FastHasher;
-use std::hash::BuildHasher;
+use core::hash::BuildHasher;
 
 pub struct Murmur3BuildHasher;
 
diff --git a/src/main.rs b/src/main.rs
index ed01299..0bd27f1 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -5,13 +5,10 @@ extern crate lzjd;
 #[macro_use]
 extern crate failure_derive;
 
-mod crc32;
-mod murmur3;
+use lzjd::{murmur3, LZDict, LZJDError};
 
 use murmur3::Murmur3BuildHasher;
 
-use lzjd::{LZDict, LZJDError};
-
 use std::fs::File;
 use std::io::Write;
 use std::io::{self, BufRead, BufReader, BufWriter, Read};