Assign check result of flags to a variable for understandability

Author: KitaitiMakoto

ext/fiddle/pointer.c

@@ -137,11 +137,12 @@ fiddle_ptr_memory_view_available_p(VALUE obj)
 static bool
 fiddle_ptr_get_memory_view(VALUE obj, rb_memory_view_t *view, int flags)
 {
-    bool writable_requested = flags & RUBY_MEMORY_VIEW_WRITABLE;
-    if (flags != RUBY_MEMORY_VIEW_SIMPLE && flags != RUBY_MEMORY_VIEW_WRITABLE) return false;
+    bool flags_supported = flags == RUBY_MEMORY_VIEW_SIMPLE || flags == RUBY_MEMORY_VIEW_WRITABLE;
+    bool read_only = !(flags & RUBY_MEMORY_VIEW_WRITABLE);
+    if (!flags_supported) return false;
 
     struct ptr_data *data = fiddle_ptr_check_memory_view(obj);
-    rb_memory_view_init_as_byte_array(view, obj, data->ptr, data->size, !writable_requested);
+    rb_memory_view_init_as_byte_array(view, obj, data->ptr, data->size, read_only);
 
     return true;
 }