api/msgpack-rpc: Refactor msgpack_rpc_helpers.{c,h}

- Move helpers that are specific to API types to api/private/helpers.{c,h}
- Include headers with generated declarations
- Delete unused macros

src/nvim/api/private/helpers.c

@@ -449,6 +449,64 @@ bool object_to_vim(Object obj, typval_T *tv, Error *err)
   return true;
 }
 
+void api_free_string(String value)
+{
+  if (!value.data) {
+    return;
+  }
+
+  free(value.data);
+}
+
+void api_free_object(Object value)
+{
+  switch (value.type) {
+    case kObjectTypeNil:
+    case kObjectTypeBoolean:
+    case kObjectTypeInteger:
+    case kObjectTypeFloat:
+    case kObjectTypeBuffer:
+    case kObjectTypeWindow:
+    case kObjectTypeTabpage:
+      break;
+
+    case kObjectTypeString:
+      api_free_string(value.data.string);
+      break;
+
+    case kObjectTypeArray:
+      api_free_array(value.data.array);
+      break;
+
+    case kObjectTypeDictionary:
+      api_free_dictionary(value.data.dictionary);
+      break;
+
+    default:
+      abort();
+  }
+}
+
+void api_free_array(Array value)
+{
+  for (size_t i = 0; i < value.size; i++) {
+    api_free_object(value.items[i]);
+  }
+
+  free(value.items);
+}
+
+void api_free_dictionary(Dictionary value)
+{
+  for (size_t i = 0; i < value.size; i++) {
+    api_free_string(value.items[i].key);
+    api_free_object(value.items[i].value);
+  }
+
+  free(value.items);
+}
+
+
 /// Recursion helper for the `vim_to_object`. This uses a pointer table
 /// to avoid infinite recursion due to cyclic references
 ///

src/nvim/api/private/helpers.h

@@ -51,36 +51,11 @@
   .data.array = a                                                             \
   })
 
-#define STRINGARRAY_OBJ(a) ((Object) {                                        \
-  .type = kObjectTypeStringArray,                                             \
-  .data.stringarray = a                                                       \
-  })
-
-#define BUFFERARRAY_OBJ(a) ((Object) {                                        \
-  .type = kObjectTypeBufferArray,                                             \
-  .data.bufferarray = a                                                       \
-  })
-
-#define WINDOWARRAY_OBJ(a) ((Object) {                                        \
-  .type = kObjectTypeWindowArray,                                             \
-  .data.windowarray = a                                                       \
-  })
-
-#define TABPAGEARRAY_OBJ(a) ((Object) {                                       \
-  .type = kObjectTypeTabpageArray,                                            \
-  .data.tabpagearray = a                                                      \
-  })
-
 #define DICTIONARY_OBJ(d) ((Object) {                                         \
   .type = kObjectTypeDictionary,                                              \
   .data.dictionary = d                                                        \
   })
 
-#define POSITION_OBJ(p) ((Object) {                                           \
-  .type = kObjectTypePosition,                                                \
-  .data.position = p                                                          \
-  })
-
 #define NIL ((Object) {.type = kObjectTypeNil})
 
 #define PUT(dict, k, v)                                                       \
@@ -91,6 +66,25 @@
 #define ADD(array, item)                                                      \
   kv_push(Object, array, item)
 
+// Helpers used by the generated msgpack-rpc api wrappers
+#define api_init_boolean
+#define api_init_integer
+#define api_init_float
+#define api_init_string = STRING_INIT
+#define api_init_buffer
+#define api_init_window
+#define api_init_tabpage
+#define api_init_object = NIL
+#define api_init_array = ARRAY_DICT_INIT
+#define api_init_dictionary = ARRAY_DICT_INIT
+
+#define api_free_boolean(value)
+#define api_free_integer(value)
+#define api_free_float(value)
+#define api_free_buffer(value)
+#define api_free_window(value)
+#define api_free_tabpage(value)
+
 #ifdef INCLUDE_GENERATED_DECLARATIONS
 # include "api/private/helpers.h.generated.h"
 #endif