From 3138ba787e95bc6dcec45e4064cffdf068767ad9 Mon Sep 17 00:00:00 2001
From: Patrick Marks <pmarks@gmail.com>
Date: Fri, 4 Mar 2022 20:18:41 -0800
Subject: [PATCH] fix #14 - allow 0 sized uncompressed data

---
 lz4-sys/liblz4   |  2 +-
 src/block/mod.rs | 11 ++++++++++-
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/lz4-sys/liblz4 b/lz4-sys/liblz4
index d44371841..fdf2ef580 160000
--- a/lz4-sys/liblz4
+++ b/lz4-sys/liblz4
@@ -1 +1 @@
-Subproject commit d44371841a2f1728a3f36839fd4b7e872d0927d3
+Subproject commit fdf2ef5809ca875c454510610764d9125ef2ebbd
diff --git a/src/block/mod.rs b/src/block/mod.rs
index 7d61e045b..0ff1071ce 100644
--- a/src/block/mod.rs
+++ b/src/block/mod.rs
@@ -141,7 +141,7 @@ pub fn decompress(mut src: &[u8], uncompressed_size: Option<i32>) -> Result<Vec<
         src = &src[4..];
     }
 
-    if size <= 0 {
+    if size < 0 {
         return Err(Error::new(
             ErrorKind::InvalidInput,
             if uncompressed_size.is_some() {
@@ -276,4 +276,13 @@ mod test {
 
         assert_eq!(decompress(&compressed, None).unwrap(), reference.as_bytes())
     }
+
+    #[test]
+    fn test_empty_compress() {
+        use crate::block::{compress, decompress};
+        let v = vec![0u8; 0];
+        let comp_with_prefix = compress(&v, None, true).unwrap();
+        dbg!(&comp_with_prefix);
+        assert_eq!(v, decompress(&comp_with_prefix, None).unwrap());
+    }
 }