feat(core): add access methods for Buffer

core/src/types/buffer.rs

@@ -176,6 +176,27 @@ impl Buffer {
  self.len() == 0
  }
 
+ /// Number of [`Bytes`] in [`Buffer`].
+ ///
+ /// For contiguous buffer, it's always 1. For non-contiguous buffer, it's number of bytes
+ /// available for use.
+ pub fn count(&self) -> usize {
+ match &self.0 {
+ Inner::Contiguous(_) => 1,
+ Inner::NonContiguous { parts, idx, .. } => parts.len() - idx,
+ }
+ }
+
+ /// Get current [`Bytes`].
+ pub fn current(&self) -> Bytes {
+ match &self.0 {
+ Inner::Contiguous(inner) => inner.clone(),
+ Inner::NonContiguous {
+ parts, idx, offset, ..
+ } => parts[idx].slice(offset..),
+ }
+ }
+
  /// Shortens the buffer, keeping the first `len` bytes and dropping the rest.
  ///
  /// If `len` is greater than the buffer’s current length, this has no effect.