Deliver float events from scylla table

bitshuffle/src/bitshuffle.rs

@@ -1,4 +1,4 @@
-use libc::size_t;
+use libc::{c_int, size_t};
 
 extern "C" {
     pub fn bshuf_compress_lz4(
@@ -8,6 +8,7 @@ extern "C" {
         elem_size: size_t,
         block_size: size_t,
     ) -> i64;
+
     pub fn bshuf_decompress_lz4(
         inp: *const u8,
         out: *const u8,
@@ -15,6 +16,13 @@ extern "C" {
         elem_size: size_t,
         block_size: size_t,
     ) -> i64;
+
+    pub fn LZ4_decompress_safe(
+        source: *const u8,
+        dest: *mut u8,
+        compressedSize: c_int,
+        maxDecompressedSize: c_int,
+    ) -> c_int;
 }
 
 pub fn bitshuffle_compress(
@@ -50,3 +58,13 @@ pub fn bitshuffle_decompress(
         }
     }
 }
+
+pub fn lz4_decompress(inp: &[u8], out: &mut [u8]) -> Result<usize, isize> {
+    let max_out = out.len() as _;
+    let ec = unsafe { LZ4_decompress_safe(inp.as_ptr(), out.as_mut_ptr(), inp.len() as _, max_out) };
+    if ec < 0 {
+        Err(ec as _)
+    } else {
+        Ok(ec as _)
+    }
+}