120 lines
4.6 KiB
C
120 lines
4.6 KiB
C
/* $NetBSD: stdarg.h,v 1.17 2000/10/13 03:53:26 christos Exp $ */
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/*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This software was developed by the Computer Systems Engineering group
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* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
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* contributed to Berkeley.
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*
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* All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Lawrence Berkeley Laboratory.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: @(#)stdarg.h 8.2 (Berkeley) 9/27/93
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*/
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#ifndef _SPARC_STDARG_H_
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#define _SPARC_STDARG_H_
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#include <machine/ansi.h>
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#include <sys/featuretest.h>
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typedef _BSD_VA_LIST_ va_list;
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#ifdef __lint__
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#define __builtin_saveregs() (0)
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#define __builtin_classify_type(t) (0)
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#define __builtin_next_arg(t) ((t) ? 0 : 0)
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#endif
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#define __va_size(type) \
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(((sizeof(type) + sizeof(long) - 1) / sizeof(long)) * sizeof(long))
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#define va_start(ap, last) \
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(void)(__builtin_next_arg(last), (ap) = (va_list)__builtin_saveregs())
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/*
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* va_arg picks up the next argument of type `type'. Appending an
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* asterisk to `type' must produce a pointer to `type' (i.e., `type'
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* may not be, e.g., `int (*)()').
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*
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* Gcc-2.x tries to use ldd/std for double and quad_t values, but Sun's
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* brain-damaged calling convention does not quad-align these. Thus, for
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* 8-byte arguments, we have to pick up the actual value four bytes at a
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* time, and use type punning (i.e., a union) to produce the result.
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* (We could also do this with a libc function, actually, by returning
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* 8 byte integers in %o0+%o1 and the same 8 bytes as a double in %f0+%f1.)
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*
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* Note: We don't declare __d with type `type', since in C++ the type might
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* have a constructor.
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*/
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#ifdef __lint__
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# define va_arg(ap, type) (*(type *)(void *)(ap))
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#else /* !__lint__ */
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# if __GNUC__ < 2
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# define __extension__
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# endif
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# define __va_8byte(ap, type) \
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__extension__ ({ \
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union { char __d[sizeof(type)]; int __i[2]; } __va_u; \
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__va_u.__i[0] = ((int *)(void *)(ap))[0]; \
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__va_u.__i[1] = ((int *)(void *)(ap))[1]; \
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(ap) += 8; *(type *)(va_list)__va_u.__d; \
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})
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# define __va_arg(ap, type) \
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(*(type *)((ap) += __va_size(type), \
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(ap) - (sizeof(type) < sizeof(long) && \
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sizeof(type) != __va_size(type) ? \
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sizeof(type) : __va_size(type))))
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# define __RECORD_TYPE_CLASS 12
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# define va_arg(ap, type) \
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(__builtin_classify_type(*(type *)0) >= __RECORD_TYPE_CLASS ? \
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*__va_arg(ap, type *) : __va_size(type) == 8 ? \
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__va_8byte(ap, type) : __va_arg(ap, type))
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#endif /* __lint__ */
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#if !defined(_ANSI_SOURCE) && \
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(!defined(_POSIX_C_SOURCE) && !defined(_XOPEN_SOURCE) || \
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defined(_ISOC99_SOURCE) || (__STDC_VERSION__ - 0) >= 199901L)
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# define va_copy(dest, src) \
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((dest) = (src))
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#endif
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#define va_end(ap)
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#endif /* !_SPARC_STDARG_H_ */
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