Unified accessor for WhichOneof().

PiperOrigin-RevId: 495220998

upb/message/accessors.h

@@ -112,7 +112,7 @@ UPB_INLINE void _upb_MiniTable_CopyFieldData(void* to, const void* from,
 // we are left with ideal code.  This can happen either through through
 // literals or UPB_ASSUME():
 //
-//   // Via string literals.
+//   // Via struct literals.
 //   bool FooMessage_set_bool_field(const upb_Message* msg, bool val) {
 //     const upb_MiniTableField field = {1, 0, 0, /* etc... */};
 //     // All value in "field" are compile-time known.
@@ -132,7 +132,7 @@ UPB_INLINE void _upb_MiniTable_CopyFieldData(void* to, const void* from,
 // As a result, we can use these universal getters/setters for *all* message
 // accessors: generated code, MiniTable accessors, and reflection.  The only
 // exception is the binary encoder/decoder, which need to be a bit more clever
-// about how the read/write the message data, for efficiency.
+// about how they read/write the message data, for efficiency.
 //
 // These functions work on both extensions and non-extensions. If the field
 // of a setter is known to be a non-extension, the arena may be NULL and the
@@ -240,7 +240,7 @@ UPB_INLINE void _upb_Message_ClearExtensionField(
 UPB_INLINE void _upb_Message_ClearNonExtensionField(
     upb_Message* msg, const upb_MiniTableField* field) {
   if (field->presence > 0) {
-    _upb_clearhas_field(msg, field);
+    _upb_clearhas(msg, _upb_Message_Hasidx(field));
   } else if (_upb_MiniTableField_InOneOf(field)) {
     uint32_t* oneof_case = _upb_oneofcase_field(msg, field);
     if (*oneof_case != field->number) return;
@@ -273,6 +273,12 @@ UPB_API_INLINE bool upb_Message_HasField(const upb_Message* msg,
   }
 }
 
+UPB_API_INLINE uint32_t upb_Message_WhichOneofFieldNumber(
+    const upb_Message* message, const upb_MiniTableField* oneof_field) {
+  UPB_ASSUME(_upb_MiniTableField_InOneOf(oneof_field));
+  return _upb_getoneofcase_field(message, oneof_field);
+}
+
 UPB_API_INLINE bool upb_Message_GetBool(const upb_Message* msg,
                                         const upb_MiniTableField* field,
                                         bool default_val) {

upb/mini_table/field_internal.h

@@ -139,21 +139,8 @@ UPB_INLINE void _upb_sethas_field(const upb_Message* msg,
   _upb_sethas(msg, _upb_Message_Hasidx(f));
 }
 
-UPB_INLINE void _upb_clearhas_field(const upb_Message* msg,
-                                    const upb_MiniTableField* f) {
-  _upb_clearhas(msg, _upb_Message_Hasidx(f));
-}
-
 // Oneof case access ///////////////////////////////////////////////////////////
 
-UPB_INLINE uint32_t* _upb_oneofcase(upb_Message* msg, size_t case_ofs) {
-  return UPB_PTR_AT(msg, case_ofs, uint32_t);
-}
-
-UPB_INLINE uint32_t _upb_getoneofcase(const void* msg, size_t case_ofs) {
-  return *UPB_PTR_AT(msg, case_ofs, uint32_t);
-}
-
 UPB_INLINE size_t _upb_oneofcase_ofs(const upb_MiniTableField* f) {
   UPB_ASSERT(f->presence < 0);
   return ~(ptrdiff_t)f->presence;
@@ -161,16 +148,12 @@ UPB_INLINE size_t _upb_oneofcase_ofs(const upb_MiniTableField* f) {
 
 UPB_INLINE uint32_t* _upb_oneofcase_field(upb_Message* msg,
                                           const upb_MiniTableField* f) {
-  return _upb_oneofcase(msg, _upb_oneofcase_ofs(f));
+  return UPB_PTR_AT(msg, _upb_oneofcase_ofs(f), uint32_t);
 }
 
 UPB_INLINE uint32_t _upb_getoneofcase_field(const upb_Message* msg,
                                             const upb_MiniTableField* f) {
-  return _upb_getoneofcase(msg, _upb_oneofcase_ofs(f));
-}
-
-UPB_INLINE bool _upb_has_submsg_nohasbit(const upb_Message* msg, size_t ofs) {
-  return *UPB_PTR_AT(msg, ofs, const upb_Message*) != NULL;
+  return *_upb_oneofcase_field((upb_Message*)msg, f);
 }
 
 // LINT.ThenChange(GoogleInternalName2)

upb/port/def.inc

@@ -80,10 +80,6 @@
  */
 #define UPB_PTR_AT(msg, ofs, type) ((type*)((char*)(msg) + (ofs)))
 
-#define UPB_WRITE_ONEOF(msg, fieldtype, offset, value, case_offset, case_val) \
-  *UPB_PTR_AT(msg, case_offset, int) = case_val;                             \
-  *UPB_PTR_AT(msg, offset, fieldtype) = value;
-
 #define UPB_MAPTYPE_STRING 0
 
 // UPB_EXPORT: always generate a public symbol.

upb/port/undef.inc

@@ -29,8 +29,6 @@
 
 #undef UPB_SIZE
 #undef UPB_PTR_AT
-#undef UPB_READ_ONEOF
-#undef UPB_WRITE_ONEOF
 #undef UPB_MAPTYPE_STRING
 #undef UPB_EXPORT
 #undef UPB_INLINE

upb/reflection/message.c

@@ -57,7 +57,7 @@ const upb_FieldDef* upb_Message_WhichOneof(const upb_Message* msg,
     return upb_Message_HasFieldByDef(msg, f) ? f : NULL;
   } else {
     const upb_MiniTableField* field = upb_FieldDef_MiniTable(f);
-    uint32_t oneof_case = _upb_getoneofcase_field(msg, field);
+    uint32_t oneof_case = upb_Message_WhichOneofFieldNumber(msg, field);
     f = oneof_case ? upb_OneofDef_LookupNumber(o, oneof_case) : NULL;
     UPB_ASSERT((f != NULL) == (oneof_case != 0));
     return f;

upbc/protoc-gen-upb.cc

@@ -367,10 +367,12 @@ void GenerateOneofInHeader(const protobuf::OneofDescriptor* oneof,
   output(
       R"cc(
         UPB_INLINE $0_oneofcases $1_$2_case(const $1* msg) {
-          return ($0_oneofcases)*UPB_PTR_AT(msg, $3, int32_t);
+          const upb_MiniTableField field = $3;
+          return ($0_oneofcases)upb_Message_WhichOneofFieldNumber(msg, &field);
         }
       )cc",
-      fullname, msg_name, oneof->name(), layout.GetOneofCaseOffset(oneof));
+      fullname, msg_name, oneof->name(),
+      FieldInitializer(layout, oneof->field(0)));
 }
 
 void GenerateHazzer(const protobuf::FieldDescriptor* field,