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Annotation of sys/sys/varargs.h, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: varargs.h,v 1.2 2004/01/03 14:55:34 espie Exp $ */
                      2: /*
                      3:  * Copyright (c) 2003, 2004  Marc espie <espie@openbsd.org>
                      4:  *
                      5:  * Permission to use, copy, modify, and distribute this software for any
                      6:  * purpose with or without fee is hereby granted, provided that the above
                      7:  * copyright notice and this permission notice appear in all copies.
                      8:  *
                      9:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
                     10:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
                     11:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
                     12:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
                     13:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
                     14:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
                     15:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
                     16:  */
                     17:
                     18: #ifndef _VARARGS_H_
                     19: #define _VARARGS_H_
                     20:
                     21: #if defined(__GNUC__) && __GNUC__ >= 3
                     22: /* These macros implement traditional (non-ANSI) varargs
                     23:    for GNU C.  */
                     24:
                     25: #define va_alist  __builtin_va_alist
                     26:
                     27: #define        __va_ellipsis   ...
                     28:
                     29: /* ??? We don't process attributes correctly in K&R argument context.  */
                     30: typedef int __builtin_va_alist_t __attribute__((__mode__(__word__)));
                     31:
                     32: /* ??? It would be nice to get rid of the ellipsis here.  It causes
                     33:    current_function_varargs to be set in cc1.  */
                     34: #define va_dcl         __builtin_va_alist_t __builtin_va_alist; ...
                     35:
                     36: /* Define __gnuc_va_list, just as in stdarg.h.  */
                     37:
                     38: #ifndef __GNUC_VA_LIST
                     39: #define __GNUC_VA_LIST
                     40: typedef __builtin_va_list __gnuc_va_list;
                     41: #endif
                     42:
                     43: #define va_start(v)    __builtin_varargs_start((v))
                     44: #define va_end         __builtin_va_end
                     45: #define va_arg         __builtin_va_arg
                     46: #define __va_copy(d,s) __builtin_va_copy((d),(s))
                     47:
                     48: /* Define va_list from __gnuc_va_list.  */
                     49:
                     50: typedef __gnuc_va_list va_list;
                     51:
                     52: #else
                     53: #include <machine/varargs.h>
                     54: #endif
                     55:
                     56: #endif /* _VARARGS_H_ */