replace upb_Map_Delete()

We would like for upb_Map_Delete() to optionally return the deleted value.
Unfortunately this will require several steps since we are crossing repos.
Step protocolbuffers#3: Give the new footprint to the original function and switch back to it.

Since we're already touching map.h, also mark UPB_API as appropriate.

PiperOrigin-RevId: 498398474

lua/msg.c

@@ -579,7 +579,7 @@ static int lupb_Map_Newindex(lua_State* L) {
   upb_MessageValue key = lupb_tomsgval(L, lmap->key_type, 2, 1, LUPB_REF);
 
   if (lua_isnil(L, 3)) {
-    upb_Map_Delete2(map, key, NULL);
+    upb_Map_Delete(map, key, NULL);
   } else {
     upb_MessageValue val = lupb_tomsgval(L, lmap->value_type, 3, 1, LUPB_COPY);
     upb_Map_Set(map, key, val, lupb_Arenaget(L, 1));

python/map.c

@@ -182,7 +182,7 @@ int PyUpb_MapContainer_AssignSubscript(PyObject* _self, PyObject* key,
     if (!PyUpb_PyToUpb(val, val_f, &u_val, arena)) return -1;
     if (!PyUpb_MapContainer_Set(self, map, u_key, u_val, arena)) return -1;
   } else {
-    if (!upb_Map_Delete2(map, u_key, NULL)) {
+    if (!upb_Map_Delete(map, u_key, NULL)) {
       PyErr_Format(PyExc_KeyError, "Key not present in map");
       return -1;
     }

upb/collections/map.c

@@ -70,8 +70,7 @@ upb_MapInsertStatus upb_Map_Insert(upb_Map* map, upb_MessageValue key,
                                               map->val_size, arena);
 }
 
-bool upb_Map_Delete2(upb_Map* map, upb_MessageValue key,
-                     upb_MessageValue* val) {
+bool upb_Map_Delete(upb_Map* map, upb_MessageValue key, upb_MessageValue* val) {
   upb_value v;
   const bool ok = _upb_Map_Delete(map, &key, map->key_size, &v);
   if (val) val->uint64_val = v.val;

upb/collections/map.h

@@ -39,50 +39,53 @@
 extern "C" {
 #endif
 
-/* Creates a new map on the given arena with the given key/value size. */
-upb_Map* upb_Map_New(upb_Arena* a, upb_CType key_type, upb_CType value_type);
+// Creates a new map on the given arena with the given key/value size.
+UPB_API upb_Map* upb_Map_New(upb_Arena* a, upb_CType key_type,
+                             upb_CType value_type);
 
-/* Returns the number of entries in the map. */
-size_t upb_Map_Size(const upb_Map* map);
+// Returns the number of entries in the map.
+UPB_API size_t upb_Map_Size(const upb_Map* map);
 
-/* Stores a value for the given key into |*val| (or the zero value if the key is
- * not present).  Returns whether the key was present.  The |val| pointer may be
- * NULL, in which case the function tests whether the given key is present.  */
-bool upb_Map_Get(const upb_Map* map, upb_MessageValue key,
-                 upb_MessageValue* val);
+// Stores a value for the given key into |*val| (or the zero value if the key is
+// not present). Returns whether the key was present. The |val| pointer may be
+// NULL, in which case the function tests whether the given key is present.
+UPB_API bool upb_Map_Get(const upb_Map* map, upb_MessageValue key,
+                         upb_MessageValue* val);
 
-/* Removes all entries in the map. */
-void upb_Map_Clear(upb_Map* map);
+// Removes all entries in the map.
+UPB_API void upb_Map_Clear(upb_Map* map);
 
 typedef enum {
   kUpb_MapInsertStatus_Inserted = 0,
   kUpb_MapInsertStatus_Replaced = 1,
   kUpb_MapInsertStatus_OutOfMemory = 2,
 } upb_MapInsertStatus;
 
-/* Sets the given key to the given value, returning whether the key was inserted
- * or replaced.  If the key was inserted, then any existing iterators will be
- * invalidated. */
-upb_MapInsertStatus upb_Map_Insert(upb_Map* map, upb_MessageValue key,
-                                   upb_MessageValue val, upb_Arena* arena);
-
-/* Sets the given key to the given value.  Returns false if memory allocation
- * failed. If the key is newly inserted, then any existing iterators will be
- * invalidated. */
-UPB_INLINE bool upb_Map_Set(upb_Map* map, upb_MessageValue key,
-                            upb_MessageValue val, upb_Arena* arena) {
+// Sets the given key to the given value, returning whether the key was inserted
+// or replaced. If the key was inserted, then any existing iterators will be
+// invalidated.
+UPB_API upb_MapInsertStatus upb_Map_Insert(upb_Map* map, upb_MessageValue key,
+                                           upb_MessageValue val,
+                                           upb_Arena* arena);
+
+// Sets the given key to the given value. Returns false if memory allocation
+// failed. If the key is newly inserted, then any existing iterators will be
+// invalidated.
+UPB_API_INLINE bool upb_Map_Set(upb_Map* map, upb_MessageValue key,
+                                upb_MessageValue val, upb_Arena* arena) {
   return upb_Map_Insert(map, key, val, arena) !=
          kUpb_MapInsertStatus_OutOfMemory;
 }
 
 // Deletes this key from the table. Returns true if the key was present.
 // If present and |val| is non-NULL, stores the deleted value.
-bool upb_Map_Delete2(upb_Map* map, upb_MessageValue key, upb_MessageValue* val);
+UPB_API bool upb_Map_Delete(upb_Map* map, upb_MessageValue key,
+                            upb_MessageValue* val);
 
-// Deletes this key from the table. Returns true if the key was present.
 // (DEPRECATED and going away soon. Do not use.)
-UPB_INLINE bool upb_Map_Delete(upb_Map* map, upb_MessageValue key) {
-  return upb_Map_Delete2(map, key, NULL);
+UPB_INLINE bool upb_Map_Delete2(upb_Map* map, upb_MessageValue key,
+                                upb_MessageValue* val) {
+  return upb_Map_Delete(map, key, val);
 }
 
 // Map iteration:
@@ -97,8 +100,8 @@ UPB_INLINE bool upb_Map_Delete(upb_Map* map, upb_MessageValue key) {
 
 // Advances to the next entry. Returns false if no more entries are present.
 // Otherwise returns true and populates both *key and *value.
-bool upb_Map_Next(const upb_Map* map, upb_MessageValue* key,
-                  upb_MessageValue* val, size_t* iter);
+UPB_API bool upb_Map_Next(const upb_Map* map, upb_MessageValue* key,
+                          upb_MessageValue* val, size_t* iter);
 
 // DEPRECATED iterator, slated for removal.
 
@@ -114,12 +117,12 @@ bool upb_Map_Next(const upb_Map* map, upb_MessageValue* key,
 // Advances to the next entry. Returns false if no more entries are present.
 bool upb_MapIterator_Next(const upb_Map* map, size_t* iter);
 
-/* Returns true if the iterator still points to a valid entry, or false if the
- * iterator is past the last element. It is an error to call this function with
- * kUpb_Map_Begin (you must call next() at least once first). */
+// Returns true if the iterator still points to a valid entry, or false if the
+// iterator is past the last element. It is an error to call this function with
+// kUpb_Map_Begin (you must call next() at least once first).
 bool upb_MapIterator_Done(const upb_Map* map, size_t iter);
 
-/* Returns the key and value for this entry of the map. */
+// Returns the key and value for this entry of the map.
 upb_MessageValue upb_MapIterator_Key(const upb_Map* map, size_t iter);
 upb_MessageValue upb_MapIterator_Value(const upb_Map* map, size_t iter);