Fix string setter thunk to use PtrAndLen instead of two args.

PiperOrigin-RevId: 565118836

rust/internal.rs

@@ -97,3 +97,9 @@ impl PtrAndLen {
         }
     }
 }
+
+impl From<&[u8]> for PtrAndLen {
+    fn from(slice: &[u8]) -> Self {
+        Self { ptr: slice.as_ptr(), len: slice.len() }
+    }
+}

rust/vtable.rs

@@ -299,7 +299,7 @@ impl_raw_vtable_mutator_get_set!(bool, f32, f64, i32, i64, u32, u64);
 #[doc(hidden)]
 #[derive(Debug)]
 pub struct BytesMutVTable {
-    pub(crate) setter: unsafe extern "C" fn(msg: RawMessage, val: *const u8, len: usize),
+    pub(crate) setter: unsafe extern "C" fn(msg: RawMessage, val: PtrAndLen),
     pub(crate) getter: unsafe extern "C" fn(msg: RawMessage) -> PtrAndLen,
 }
 
@@ -316,7 +316,7 @@ impl BytesMutVTable {
     pub const fn new(
         _private: Private,
         getter: unsafe extern "C" fn(msg: RawMessage) -> PtrAndLen,
-        setter: unsafe extern "C" fn(msg: RawMessage, val: *const u8, len: usize),
+        setter: unsafe extern "C" fn(msg: RawMessage, val: PtrAndLen),
     ) -> Self {
         Self { getter, setter }
     }
@@ -330,7 +330,7 @@ impl BytesOptionalMutVTable {
     pub const unsafe fn new(
         _private: Private,
         getter: unsafe extern "C" fn(msg: RawMessage) -> PtrAndLen,
-        setter: unsafe extern "C" fn(msg: RawMessage, val: *const u8, len: usize),
+        setter: unsafe extern "C" fn(msg: RawMessage, val: PtrAndLen),
         clearer: unsafe extern "C" fn(msg: RawMessage),
         default: &'static [u8],
     ) -> Self {
@@ -355,7 +355,7 @@ impl<'msg> RawVTableMutator<'msg, [u8]> {
         let val = copy_bytes_in_arena_if_needed_by_runtime(self.msg_ref, val);
         // SAFETY:
         // - `msg_ref` is valid for `'msg` as promised by the caller of `new`.
-        unsafe { (self.vtable.setter)(self.msg_ref.msg(), val.as_ptr(), val.len()) }
+        unsafe { (self.vtable.setter)(self.msg_ref.msg(), val.into()) }
     }
 
     pub(crate) fn truncate(&self, len: usize) {
@@ -385,7 +385,7 @@ impl<'msg> RawVTableOptionalMutatorData<'msg, [u8]> {
         let val = copy_bytes_in_arena_if_needed_by_runtime(self.msg_ref, val);
         // SAFETY:
         // - `msg_ref` is valid for `'msg` as promised by the caller.
-        unsafe { (self.vtable.base.setter)(self.msg_ref.msg(), val.as_ptr(), val.len()) }
+        unsafe { (self.vtable.base.setter)(self.msg_ref.msg(), val.into()) }
         self
     }
 

src/google/protobuf/compiler/rust/accessors/singular_string.cc

@@ -171,7 +171,7 @@ void SingularString::InExternC(Context<FieldDescriptor> field) const {
              R"rs(
           $hazzer$
           fn $getter_thunk$(raw_msg: $pbi$::RawMessage) -> $pbi$::PtrAndLen;
-          fn $setter_thunk$(raw_msg: $pbi$::RawMessage, val: *const u8, len: usize);
+          fn $setter_thunk$(raw_msg: $pbi$::RawMessage, val: $pbi$::PtrAndLen);
           fn $clearer_thunk$(raw_msg: $pbi$::RawMessage);
         )rs");
 }
@@ -199,10 +199,10 @@ void SingularString::InThunkCc(Context<FieldDescriptor> field) const {
                $hazzer$;
                ::google::protobuf::rust_internal::PtrAndLen $getter_thunk$($QualifiedMsg$* msg) {
                  absl::string_view val = msg->$field$();
-                 return google::protobuf::rust_internal::PtrAndLen(val.data(), val.size());
+                 return ::google::protobuf::rust_internal::PtrAndLen(val.data(), val.size());
                }
-               void $setter_thunk$($QualifiedMsg$* msg, const char* ptr, ::std::size_t size) {
-                 msg->set_$field$(absl::string_view(ptr, size));
+               void $setter_thunk$($QualifiedMsg$* msg, ::google::protobuf::rust_internal::PtrAndLen s) {
+                 msg->set_$field$(absl::string_view(s.ptr, s.len));
                }
              )cc");
 }