manual_slice_size_calculation

ChrisDenton · ChrisDenton · commit fe255695f9ce · 2023-11-22T13:00:28.000Z
diff --git a/library/std/src/sys/windows/c.rs b/library/std/src/sys/windows/c.rs
@@ -82,7 +82,7 @@ pub fn nt_success(status: NTSTATUS) -> bool {
 
 impl UNICODE_STRING {
     pub fn from_ref(slice: &[u16]) -> Self {
-        let len = slice.len() * mem::size_of::<u16>();
+        let len = mem::size_of_val(slice);
         Self { Length: len as _, MaximumLength: len as _, Buffer: slice.as_ptr() as _ }
     }
 }

Original file line number	Diff line number	Diff line change
`@@ -82,7 +82,7 @@ pub fn nt_success(status: NTSTATUS) -> bool {`
`82`	`82`
`83`	`83`	`impl UNICODE_STRING {`
`84`	`84`	`pub fn from_ref(slice: &[u16]) -> Self {`
`85`		`- let len = slice.len() * mem::size_of::<u16>();`
	`85`	`+ let len = mem::size_of_val(slice);`
`86`	`86`	`Self { Length: len as _, MaximumLength: len as _, Buffer: slice.as_ptr() as _ }`
`87`	`87`	`}`
`88`	`88`	`}`