/**
 * \file
 * cclass.h: basic "class-like" handling of code and data structures
 * Copyright (C) 2011  Georg Hopp
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef __CCLASS_H__
#define __CCLASS_H__

#include <stdarg.h>
#include <sys/types.h>
#include <json/json.h>

#define CCLASS_MAGIC    0xFEFE


typedef void (* ctor)(void *, va_list *);
typedef void (* clr)(void *);
typedef void (* dtor)(void *);
typedef void (* jCtor)(void *, struct json_object *);
typedef void (* jTo)(void *, struct json_object **);

typedef struct _CCLASS {
    const int magic;
    size_t size;
    ctor  __construct;
    clr   __clear;
    dtor  __destruct;
    jCtor __jsonConst;
    jTo   __toJson;
} * CCLASS;

#define CCLASS_SIZE     sizeof(struct _CCLASS)
#define CCLASS_PTR_SIZE sizeof(CCLASS)

#define __construct(_class) \
    static void __construct(_class this, va_list * params)
#define __clear(_class) \
    static void __clear(_class this)
#define __destruct(_class) \
    static void __destruct(_class this)
#define __jsonConst(_class) \
    static void __jsonConst(_class this, struct json_object * json)
#define __toJson(_class) \
    static void __toJson(_class this, struct json_object ** json)

#define CLASS(_class) \
    struct _##_class; \
    typedef struct _##_class * _class; \
    extern const CCLASS const __##_class; \
    struct _##_class

#define INIT_CLASS(_class) \
    __construct(_class); \
    __clear(_class); \
    __destruct(_class); \
    __jsonConst(_class); \
    __toJson(_class); \
    static const struct _CCLASS _cclass = { \
        CCLASS_MAGIC, \
        sizeof(struct _##_class), \
        (ctor)__construct, \
        (clr)__clear, \
        (dtor)__destruct, \
        (jCtor)__jsonConst, \
        (jTo)__toJson \
    }; const CCLASS __##_class = (const CCLASS)&_cclass

void * _new(const CCLASS _class, ...);
#define new(_class, ...) _new((__##_class), __VA_ARGS__)

void * _newFromJson(const CCLASS _class, struct json_object * json);
#define newFromJson(_class, json) _newFromJson((__##_class), (json))

int    _instanceOf(const CCLASS _class, void * _object);
#define instanceOf(_class, object) _instanceOf((__##_class), (object))

void   clear(void * _object);
void   delete(void * _object);
void   toJson(void * _object, struct json_object ** json);
int    isObject(void * _object);

#endif//__CCLASS_H__

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