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/*
Copyright (C) 2000, 2002, 2003 Andreas Gruenbacher <agruen@suse.de>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, see <https://www.gnu.org/licenses/>.
*/
#ifndef __LIBOBJ_H
#define __LIBOBJ_H
#include <stdlib.h>
#include "misc.h"
/* Ugly pointer manipulation */
#ifdef LIBACL_DEBUG
# define ext2int(T, ext_p) \
((T##_obj *)__ext2int_and_check(ext_p, T##_MAGIC, #T))
#else
# define ext2int(T, ext_p) \
((T##_obj *)__ext2int_and_check(ext_p, T##_MAGIC))
#endif
#define int2ext(int_p) \
((int_p) ? &(int_p)->i : NULL)
#define new_var_obj_p(T, sz) \
((T##_obj *)__new_var_obj_p(T##_MAGIC, sizeof(T##_obj) + sz))
#define realloc_var_obj_p(T, p, sz) \
((T##_obj *)realloc(p, sizeof(T##_obj) + sz))
#define new_obj_p(T) \
new_var_obj_p(T, 0)
#define new_obj_p_here(T, p) \
__new_obj_p_here(T##_MAGIC, p)
#define check_obj_p(T, obj_p) \
((T##_obj *)__check_obj_p((obj_prefix *)(obj_p), T##_MAGIC))
#define free_obj_p(obj_p) \
(__free_obj_p((obj_prefix *)(obj_p)))
/* prefix for all objects */
/* [Note: p_magic is a long rather than int so that this structure */
/* does not become padded by the compiler on 64-bit architectures] */
typedef struct {
unsigned long p_magic:16;
unsigned long p_flags:16;
} obj_prefix;
#define pmagic o_prefix.p_magic
#define pflags o_prefix.p_flags
/* magic object values */
#define acl_MAGIC (0x712C)
#define acl_entry_MAGIC (0x9D6B)
#define acl_permset_MAGIC (0x1ED5)
#define qualifier_MAGIC (0x1C27)
#define string_MAGIC (0xD5F2)
#define cap_MAGIC (0x6CA8)
/* object flags */
#define OBJ_MALLOC_FLAG 1
/* object types */
struct string_obj_tag;
typedef struct string_obj_tag string_obj;
/* string object */
struct string_obj_tag {
obj_prefix o_prefix;
char s_str[0];
};
/* object creation, destruction, conversion and validation */
void *__new_var_obj_p(int magic, size_t size) hidden;
void __new_obj_p_here(int magic, void *here) hidden;
void __free_obj_p(obj_prefix *obj_p) hidden;
obj_prefix *__check_obj_p(obj_prefix *obj_p, int magic) hidden;
#ifdef LIBACL_DEBUG
obj_prefix *__ext2int_and_check(void *ext_p, int magic,
const char *typename) hidden;
#else
obj_prefix *__ext2int_and_check(void *ext_p, int magic) hidden;
#endif
#endif /* __LIBOBJ_H */
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