Tweak BytesMut::remaining_mut (#795)

stepancheg · web-flow · commit 4b53a29eb267 · 2025-08-20T11:57:49.000+02:00
diff --git a/src/bytes_mut.rs b/src/bytes_mut.rs
@@ -1170,7 +1170,8 @@ impl Buf for BytesMut {
 unsafe impl BufMut for BytesMut {
     #[inline]
     fn remaining_mut(&self) -> usize {
-        usize::MAX - self.len()
+        // Max allocation size is isize::MAX.
+        isize::MAX as usize - self.len()
     }
 
     #[inline]

Original file line number	Diff line number	Diff line change
`@@ -1170,7 +1170,8 @@ impl Buf for BytesMut {`
`1170`	`1170`	`unsafe impl BufMut for BytesMut {`
`1171`	`1171`	`#[inline]`
`1172`	`1172`	`fn remaining_mut(&self) -> usize {`
`1173`		`- usize::MAX - self.len()`
	`1173`	`+ // Max allocation size is isize::MAX.`
	`1174`	`+ isize::MAX as usize - self.len()`
`1174`	`1175`	`}`
`1175`	`1176`
`1176`	`1177`	`#[inline]`