4be7a2dcf3
by the application, all NetBSD interfaces are made visible, even if some other feature-test macro (like _POSIX_C_SOURCE) is defined. <sys/featuretest.h> defined _NETBSD_SOURCE if none of _ANSI_SOURCE, _POSIX_C_SOURCE and _XOPEN_SOURCE is defined, so as to preserve existing behaviour. This has two major advantages: + Programs that require non-POSIX facilities but define _POSIX_C_SOURCE can trivially be overruled by putting -D_NETBSD_SOURCE in their CFLAGS. + It makes most of the #ifs simpler, in that they're all now ORs of the various macros, rather than having checks for (!defined(_ANSI_SOURCE) || !defined(_POSIX_C_SOURCE) || !defined(_XOPEN_SOURCE)) all over the place. I've tried not to change the semantics of the headers in any case where _NETBSD_SOURCE wasn't defined, but there were some places where the current semantics were clearly mad, and retaining them was harder than correcting them. In particular, I've mostly normalised things so that _ANSI_SOURCE gets you the smallest set of stuff, then _POSIX_C_SOURCE, _XOPEN_SOURCE and _NETBSD_SOURCE in that order. Tested by building for vax, encouraged by thorpej, and uncontested in tech-userlevel for a week.
159 lines
5.3 KiB
C
159 lines
5.3 KiB
C
/* $NetBSD: stdarg.h,v 1.13 2003/04/28 23:16:22 bjh21 Exp $ */
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/*-
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* Copyright (c) 2000 Tsubai Masanari. All rights reserved.
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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. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _POWERPC_STDARG_H_
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#define _POWERPC_STDARG_H_
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#include <machine/ansi.h>
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#include <sys/featuretest.h>
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#if 0
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typedef struct {
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char __gpr; /* GPR offset */
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char __fpr; /* FPR offset */
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char __pad[2];
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char *__stack; /* args passed on stack */
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char *__base; /* args passed by registers (r3-r10, f1-f8) */
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} va_list;
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#endif
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typedef _BSD_VA_LIST_ va_list;
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#ifdef __lint__
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#define va_start(ap, last) ((ap) = *(va_list *)0)
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#define va_arg(ap, type) (*(type *)(void *)&(ap))
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#define va_end(ap)
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#define __va_copy(dest, src) ((dest) = (src))
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#elif __GNUC_PREREQ__(3, 0)
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#ifdef _LP64
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#define va_start(ap, last) __builtin_stdarg_start((ap), last)
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#define va_arg(ap, type) __builtin_va_arg((ap), type)
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#define va_end(ap) __builtin_va_end((ap))
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#define __va_copy(dest, src) __builtin_va_copy((dest), (src))
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#else
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#define va_start(ap, last) __builtin_stdarg_start((ap).__va, last)
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#define va_arg(ap, type) __builtin_va_arg((ap).__va, type)
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#define va_end(ap) __builtin_va_end((ap).__va)
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#define __va_copy(dest, src) __builtin_va_copy((dest).__va, (src).__va)
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#endif
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#else
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#if __GNUC_PREREQ__(2, 95)
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#define va_start(ap, last) \
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(__builtin_next_arg(last), \
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(ap) = *(va_list *)__builtin_saveregs())
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#else
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#define va_start(ap, last) \
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(__builtin_next_arg(last), \
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(ap).__stack = __va_stack_args, \
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(ap).__base = __va_reg_args, \
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(ap).__gpr = __va_first_gpr, \
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(ap).__fpr = __va_first_fpr)
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#define __va_first_gpr (__builtin_args_info(0))
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#define __va_first_fpr (__builtin_args_info(1) - 32 - 1)
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#define __va_stack_args \
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((char *)__builtin_saveregs() + \
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(__va_first_gpr >= 8 ? __va_first_gpr - 8 : 0) * sizeof(int))
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#define __va_reg_args \
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((char *)__builtin_frame_address(0) + __builtin_args_info(4))
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#endif /* 2.95 */
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/* From gcc/typeclass.h */
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#define __INTEGER_TYPE_CLASS 1
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#define __REAL_TYPE_CLASS 8
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#define __RECORD_TYPE_CLASS 12
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#if __GNUC_PREREQ__(2, 95)
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#define __va_longlong(type) \
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(sizeof(type) == 8 && \
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(__builtin_classify_type(*(type *)0) == __REAL_TYPE_CLASS || \
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__builtin_classify_type(*(type *)0) == __INTEGER_TYPE_CLASS))
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#else
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/* XXX gcc bug compatibility */
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#define __va_longlong(type) \
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(__builtin_classify_type(*(type *)0) == __INTEGER_TYPE_CLASS && \
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sizeof(type) == 8)
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#endif
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#ifdef _SOFT_FLOAT
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#define __va_double(type) 0
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#else
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#define __va_double(type) \
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(__builtin_classify_type(*(type *)0) == __REAL_TYPE_CLASS)
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#endif
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#define __va_struct(type) \
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(__builtin_classify_type(*(type *)0) >= __RECORD_TYPE_CLASS)
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#define __va_size(type) \
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((sizeof(type) + sizeof(int) - 1) / sizeof(int) * sizeof(int))
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#define __va_savedgpr(ap, type) \
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((ap).__base + (ap).__gpr * sizeof(int) - sizeof(type))
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#define __va_savedfpr(ap, type) \
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((ap).__base + 8 * sizeof(int) + (ap).__fpr * sizeof(double) - \
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sizeof(type))
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#define __va_stack(ap, type) \
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((ap).__stack += __va_size(type) + \
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(__va_longlong(type) ? (int)(ap).__stack & 4 : 0), \
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(ap).__stack - sizeof(type))
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#define __va_gpr(ap, type) \
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((ap).__gpr += __va_size(type) / sizeof(int) + \
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(__va_longlong(type) ? (ap).__gpr & 1 : 0), \
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(ap).__gpr <= 8 ? __va_savedgpr(ap, type) : __va_stack(ap, type))
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#define __va_fpr(ap, type) \
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((ap).__fpr++, \
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(ap).__fpr <= 8 ? __va_savedfpr(ap, type) : __va_stack(ap, type))
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#define va_arg(ap, type) \
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(*(type *)(__va_struct(type) ? (*(void **)__va_gpr(ap, void *)) : \
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__va_double(type) ? __va_fpr(ap, type) : \
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__va_gpr(ap, type)))
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#define va_end(ap)
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#define __va_copy(dest, src) ((dest) = (src))
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#endif /* __lint__ */
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#if !defined(_ANSI_SOURCE) && \
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(defined(_ISOC99_SOURCE) || (__STDC_VERSION__ - 0) >= 199901L || \
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defined(_NETBSD_SOURCE))
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#define va_copy(dest, src) __va_copy(dest, src)
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#endif
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#endif /* _POWERPC_STDARG_H_ */
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