Replace software implementation of castagnoli crc32 with hardware imp…

…lementation (#32)

Cargo.toml

@@ -30,3 +30,4 @@ flate2 = "1.0.20"
 string = "0.3.0"
 derive_builder = "0.12.0"
 paste = "1.0.7"
+crc32c = "0.6.4"

src/records.rs

@@ -32,17 +32,16 @@
 //! ```
 use bytes::Bytes;
 use indexmap::IndexMap;
+use crc32c::crc32c;
 use log::{error};
-use crc::{CRC_32_CKSUM, CRC_32_ISCSI, Crc};
+use crc::{CRC_32_CKSUM, Crc};
 use string::TryFrom;
 
 use crate::protocol::{Encoder, Decoder, EncodeError, DecodeError, StrBytes, types, buf::{ByteBuf, ByteBufMut, gap}};
 
 use super::compression::{self as cmpr, Compressor, Decompressor};
 use std::cmp::Ordering;
 
-/// CRC-32C (Castagnoli) cyclic redundancy check
-pub const CASTAGNOLI: Crc<u32> = Crc::<u32>::new(&CRC_32_ISCSI);
 /// IEEE (checksum) cyclic redundancy check.
 pub const IEEE: Crc<u32> = Crc::<u32>::new(&CRC_32_CKSUM);
 
@@ -354,7 +353,7 @@ impl RecordBatchEncoder {
         buf.fill_typed_gap(size_gap, batch_size as i32);
 
         // Fill CRC gap
-        let crc = CASTAGNOLI.checksum(buf.range(content_start..batch_end));
+        let crc = crc32c(buf.range(content_start..batch_end));
         buf.fill_typed_gap(crc_gap, crc);
 
         Ok(true)
@@ -433,7 +432,7 @@ impl RecordBatchDecoder {
 
         // CRC
         let supplied_crc: u32 = types::UInt32.decode(buf)?;
-        let actual_crc = CASTAGNOLI.checksum(buf);
+        let actual_crc = crc32c(buf);
 
         if supplied_crc != actual_crc {
             error!("Cyclic redundancy check failed ({} != {})", supplied_crc, actual_crc);