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Annotation of src/include/struct.h, Revision 1.2

1.2     ! niklas      1: /*     $OpenBSD: struct.h,v 1.3 1994/10/26 00:56:32 cgd Exp $  */
1.1       deraadt     2: /*     $NetBSD: struct.h,v 1.3 1994/10/26 00:56:32 cgd Exp $   */
                      3:
                      4: /*-
                      5:  * Copyright (c) 1983 The Regents of the University of California.
                      6:  * All rights reserved.
                      7:  *
                      8:  * Redistribution and use in source and binary forms, with or without
                      9:  * modification, are permitted provided that the following conditions
                     10:  * are met:
                     11:  * 1. Redistributions of source code must retain the above copyright
                     12:  *    notice, this list of conditions and the following disclaimer.
                     13:  * 2. Redistributions in binary form must reproduce the above copyright
                     14:  *    notice, this list of conditions and the following disclaimer in the
                     15:  *    documentation and/or other materials provided with the distribution.
                     16:  * 3. All advertising materials mentioning features or use of this software
                     17:  *    must display the following acknowledgement:
                     18:  *     This product includes software developed by the University of
                     19:  *     California, Berkeley and its contributors.
                     20:  * 4. Neither the name of the University nor the names of its contributors
                     21:  *    may be used to endorse or promote products derived from this software
                     22:  *    without specific prior written permission.
                     23:  *
                     24:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     25:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     26:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     27:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     28:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     29:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     30:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     31:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     32:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     33:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     34:  * SUCH DAMAGE.
                     35:  *
                     36:  *     @(#)struct.h    5.2 (Berkeley) 4/3/91
                     37:  */
                     38:
                     39: #ifndef _STRUCT_H_
                     40: #define        _STRUCT_H_
                     41:
                     42: /* Offset of the field in the structure. */
                     43: #define        fldoff(name, field) \
                     44:        ((int)&(((struct name *)0)->field))
                     45:
                     46: /* Size of the field in the structure. */
                     47: #define        fldsiz(name, field) \
                     48:        (sizeof(((struct name *)0)->field))
                     49:
                     50: /* Address of the structure from a field. */
                     51: #define        strbase(name, addr, field) \
                     52:        ((struct name *)((char *)(addr) - fldoff(name, field)))
                     53:
                     54: #endif /* !_STRUCT_H_ */