/usr/include/isc/magic.h is in libbind-dev 1:9.11.3+dfsg-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 | /*
* Copyright (C) 1999-2001, 2004-2007, 2016, 2017 Internet Systems Consortium, Inc. ("ISC")
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
/* $Id: magic.h,v 1.18 2007/06/19 23:47:18 tbox Exp $ */
#ifndef ISC_MAGIC_H
#define ISC_MAGIC_H 1
#include <isc/likely.h>
/*! \file isc/magic.h */
typedef struct {
unsigned int magic;
} isc__magic_t;
/*%
* To use this macro the magic number MUST be the first thing in the
* structure, and MUST be of type "unsigned int".
* The intent of this is to allow magic numbers to be checked even though
* the object is otherwise opaque.
*/
#define ISC_MAGIC_VALID(a,b) (ISC_LIKELY((a) != NULL) && \
ISC_LIKELY(((const isc__magic_t *)(a))->magic == (b)))
#define ISC_MAGIC(a, b, c, d) ((a) << 24 | (b) << 16 | (c) << 8 | (d))
#endif /* ISC_MAGIC_H */
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