1 files changed, 59 insertions, 0 deletions
diff --git a/Object.h b/Object.h
new file mode 100644
index 0000000..d5b3bb3
--- /dev/null
+++ b/Object.h
@@ -0,0 +1,59 @@
+#ifndef HEADER_Object
+#define HEADER_Object
+/*
+htop - Object.h
+(C) 2004-2012 Hisham H. Muhammad
+(C) 2020 Red Hat, Inc.  All Rights Reserved.
+Released under the GNU GPLv2+, see the COPYING file
+in the source distribution for its full text.
+*/
+
+#include "config.h" // IWYU pragma: keep
+
+#include <assert.h>
+#include <stdbool.h>
+
+#include "RichString.h"
+#include "XUtils.h" // IWYU pragma: keep
+
+
+struct Object_;
+typedef struct Object_ Object;
+
+typedef void(*Object_Display)(const Object*, RichString*);
+typedef int(*Object_Compare)(const void*, const void*);
+typedef void(*Object_Delete)(Object*);
+
+#define Object_getClass(obj_)         ((const Object*)(obj_))->klass
+#define Object_setClass(obj_, class_) (((Object*)(obj_))->klass = (const ObjectClass*) (class_))
+
+#define Object_delete(obj_)           (assert(Object_getClass(obj_)->delete), Object_getClass(obj_)->delete((Object*)(obj_)))
+#define Object_displayFn(obj_)        Object_getClass(obj_)->display
+#define Object_display(obj_, str_)    (assert(Object_getClass(obj_)->display), Object_getClass(obj_)->display((const Object*)(obj_), str_))
+#define Object_compare(obj_, other_)  (assert(Object_getClass(obj_)->compare), Object_getClass(obj_)->compare((const void*)(obj_), other_))
+
+#define Class(class_)                 ((const ObjectClass*)(&(class_ ## _class)))
+
+#define AllocThis(class_) (class_*)   xMalloc(sizeof(class_)); Object_setClass(this, Class(class_))
+
+typedef struct ObjectClass_ {
+   const void* const extends;
+   const Object_Display display;
+   const Object_Delete delete;
+   const Object_Compare compare;
+} ObjectClass;
+
+struct Object_ {
+   const ObjectClass* klass;
+};
+
+typedef union {
+   int i;
+   void* v;
+} Arg;
+
+extern const ObjectClass Object_class;
+
+bool Object_isA(const Object* o, const ObjectClass* klass);
+
+#endif