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/*
* libmowgli: A collection of useful routines for programming.
* class.h: Object class and type management, cast checking.
*
* Copyright (c) 2007 William Pitcock <nenolod -at- sacredspiral.co.uk>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice is present in all copies.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef __MOWGLI_OBJECT_CLASS_H__
#define __MOWGLI_OBJECT_CLASS_H__
typedef void (*mowgli_destructor_t)(void *);
typedef struct {
char *name;
mowgli_list_t derivitives;
mowgli_destructor_t destructor;
mowgli_boolean_t dynamic;
mowgli_list_t message_handlers;
} mowgli_object_class_t;
extern void mowgli_object_class_init(mowgli_object_class_t *klass, const char *name, mowgli_destructor_t des, mowgli_boolean_t dynamic);
extern int mowgli_object_class_check_cast(mowgli_object_class_t *klass1, mowgli_object_class_t *klass2);
extern void mowgli_object_class_set_derivitive(mowgli_object_class_t *klass, mowgli_object_class_t *parent);
extern void *mowgli_object_class_reinterpret_impl(/* mowgli_object_t */ void *object, mowgli_object_class_t *klass);
extern mowgli_object_class_t *mowgli_object_class_find_by_name(const char *name);
extern void mowgli_object_class_destroy(mowgli_object_class_t *klass);
#define MOWGLI_REINTERPRET_CAST(object, klass) (klass *) mowgli_object_class_reinterpret_impl(object, mowgli_object_class_find_by_name( # klass ));
#define mowgli_forced_cast(from_type, to_type, from, to)\
do { \
union cast_union \
{ \
to_type out; \
from_type in; \
} u; \
typedef int cant_use_union_cast[ \
sizeof (from_type) == sizeof (u) \
&& sizeof (from_type) == sizeof (to_type) ? 1 : -1];\
u.in = from; \
to = u.out; \
} while (0)
#endif
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