Support LZ4 compression

src/Tools/tool_helper/Cargo.toml

@@ -1,10 +1,11 @@
 [package]
 name = "tool_helper"
-version = "0.5.0"
+version = "0.6.0"
 edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
 cdtypes = {path = "../cdtypes"}
+lz4     = "*"
 paste   = "*"

src/Tools/tool_helper/src/compress.rs

@@ -0,0 +1,14 @@
+use super::Error;
+use lz4::EncoderBuilder;
+
+pub fn lz4(data: Vec<u8>, compression_level: u32) -> Result<Vec<u8>, Error> {
+    let mut lz4_encoder = EncoderBuilder::new().level(compression_level).build(Vec::<u8>::new())?;
+    
+    std::io::copy(&mut&data[..], &mut lz4_encoder)?;
+    let (output, result) = lz4_encoder.finish();
+
+    match result {
+        Ok(()) => Ok(output),
+        Err(error) => Err(Error::from_error(error))
+    }
+}

src/Tools/tool_helper/src/lib.rs

@@ -1,6 +1,7 @@
 use std::{boxed::Box, io::{BufReader, BufWriter, Read, Write}, path::PathBuf};
 
 pub mod bits;
+pub mod compress;
 pub mod raw;
 
 pub type BufferedInputFile = BufReader<std::fs::File>;