From 36f7278b1c420098b5c991a0d814c723ce01efa6 Mon Sep 17 00:00:00 2001
From: liudingming <liudingming@bytedance.com>
Date: Mon, 22 Nov 2021 02:20:39 +0800
Subject: [PATCH] Add `BytesMut::zeroed`

---
 src/bytes_mut.rs | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/src/bytes_mut.rs b/src/bytes_mut.rs
index 147484d53..f39b73ef8 100644
--- a/src/bytes_mut.rs
+++ b/src/bytes_mut.rs
@@ -8,6 +8,7 @@ use alloc::{
     borrow::{Borrow, BorrowMut},
     boxed::Box,
     string::String,
+    vec,
     vec::Vec,
 };
 
@@ -258,6 +259,22 @@ impl BytesMut {
         }
     }
 
+    /// Creates a new `BytesMut`, which is initialized with zero.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use bytes::BytesMut;
+    ///
+    /// let zeros = BytesMut::zeroed(42);
+    ///
+    /// assert_eq!(zeros.len(), 42);
+    /// zeros.into_iter().for_each(|x| assert_eq!(x, 0));
+    /// ```
+    pub fn zeroed(len: usize) -> BytesMut {
+        BytesMut::from_vec(vec![0; len])
+    }
+
     /// Splits the bytes into two at the given index.
     ///
     /// Afterwards `self` contains elements `[0, at)`, and the returned