varargs.h revision 119628
1/*- 2 * Copyright (c) 2002 David E. O'Brien. All rights reserved. 3 * Copyright (c) 1990, 1993 4 * The Regents of the University of California. All rights reserved. 5 * (c) UNIX System Laboratories, Inc. 6 * All or some portions of this file are derived from material licensed 7 * to the University of California by American Telephone and Telegraph 8 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 9 * the permission of UNIX System Laboratories, Inc. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the University of 22 * California, Berkeley and its contributors. 23 * 4. Neither the name of the University nor the names of its contributors 24 * may be used to endorse or promote products derived from this software 25 * without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37 * SUCH DAMAGE. 38 * 39 * @(#)varargs.h 8.2 (Berkeley) 3/22/94 40 * $FreeBSD: head/sys/amd64/include/varargs.h 119628 2003-09-01 03:01:45Z kan $ 41 */ 42 43#ifndef _MACHINE_VARARGS_H_ 44#define _MACHINE_VARARGS_H_ 45 46#if defined(__GNUC__) && (__GNUC__ == 2 && __GNUC_MINOR__ > 95 || __GNUC__ >= 3) 47 48#include <sys/_types.h> 49 50#ifndef _VA_LIST_DECLARED 51#define _VA_LIST_DECLARED 52typedef __va_list va_list; 53#endif 54 55typedef int __builtin_va_alist_t __attribute__((__mode__(__word__))); 56 57#define va_alist __builtin_va_alist 58#define va_dcl __builtin_va_alist_t __builtin_va_alist; ... 59#define va_start(ap) __builtin_varargs_start(ap) 60#define va_arg(ap, type) __builtin_va_arg((ap), type) 61#define va_end(ap) __builtin_va_end(ap) 62 63#else /* ! __GNUC__ post GCC 2.95 */ 64 65typedef char *va_list; 66 67#define __va_size(type) \ 68 (((sizeof(type) + sizeof(int) - 1) / sizeof(int)) * sizeof(int)) 69 70#ifdef __GNUC__ 71#define va_alist __builtin_va_alist 72#endif 73#if __GNUC__ > 1 74#define va_dcl int va_alist; ... 75#else 76#define va_dcl int va_alist; 77#endif 78 79#define va_start(ap) \ 80 ((ap) = (va_list)&va_alist) 81 82#define va_arg(ap, type) \ 83 (*(type *)((ap) += __va_size(type), (ap) - __va_size(type))) 84 85#define va_end(ap) 86 87#endif /* __GNUC__ post GCC 2.95 */ 88 89#endif /* !_MACHINE_VARARGS_H_ */ 90