Kelvinyu1117 commented on code in PR #121:
URL: https://github.com/apache/fluss-rust/pull/121#discussion_r2658750214
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crates/fluss/src/row/compacted/compacted_row_writer.rs:
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@@ -0,0 +1,127 @@
+use std::cmp;
+
+use bytes::{Bytes, BytesMut};
+
+pub struct CompactedRowWriter {
Review Comment:
fixed.
##########
crates/fluss/src/row/compacted/compacted_row_writer.rs:
##########
@@ -0,0 +1,127 @@
+use std::cmp;
+
+use bytes::{Bytes, BytesMut};
+
+pub struct CompactedRowWriter {
+ header_size_in_bytes: usize,
+ position: usize,
+ buffer: BytesMut,
+}
+
+impl CompactedRowWriter {
+ pub const MAX_INT_SIZE: usize = 5;
+ pub const MAX_LONG_SIZE: usize = 10;
+
+ pub fn new(field_count: usize) -> Self {
+ // bitset width in bytes, it should be in CompactedRow
+ let header_size = (field_count + 7) / 8;
+ let cap = cmp::max(64, header_size);
+
+ let mut buffer = BytesMut::with_capacity(cap);
+ buffer.resize(cap, 0);
+
+ Self {
+ header_size_in_bytes: header_size,
+ position: header_size,
+ buffer,
+ }
+ }
+
+ pub fn reset(&mut self) {
+ self.position = self.header_size_in_bytes;
+ self.buffer[..self.header_size_in_bytes].fill(0);
+ }
+
+ pub fn position(&self) -> usize {
+ self.position
+ }
+
+ pub fn buffer(&self) -> &[u8] {
+ &self.buffer[..self.position]
+ }
+
+ pub fn to_bytes(&self) -> Bytes {
+ Bytes::copy_from_slice(&self.buffer[..self.position])
+ }
+
+ fn ensure_len(&mut self, need_len: usize) {
Review Comment:
fixed.
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