60 lines
1.7 KiB
C
Executable File
60 lines
1.7 KiB
C
Executable File
/* Copyright (c) 1988 AT&T */
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/* All Rights Reserved */
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/* THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF AT&T */
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/* The copyright notice above does not evidence any */
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/* actual or intended publication of such source code. */
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#ifndef _VARARGS_H
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#define _VARARGS_H
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#pragma ident "@(#)varargs.h 1.18 94/01/27 SMI" /* SVr4.0 1.4.1.5 */
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* Many compilation systems depend upon the use of special functions
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* built into the the compilation system to handle variable argument
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* lists and stack allocations. The method to obtain this in SunOS
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* is to define the feature test macro "__BUILTIN_VA_ARG_INCR" which
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* enables the following special built-in functions:
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* __builtin_alloca
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* __builtin_va_alist
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* __builtin_va_arg_incr
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* It is intended that the compilation system define this feature test
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* macro, not the user of the system.
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*
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* The tests on the processor type are to provide a transitional period
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* for existing compilation systems, and may be removed in a future
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* release.
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*/
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#ifndef _VA_LIST
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#define _VA_LIST
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typedef char *va_list;
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#endif
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#if (defined(__BUILTIN_VA_ARG_INCR) || defined(sparc) || defined(__sparc) || \
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defined(i386) || defined(__i386))
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#define va_alist __builtin_va_alist
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#endif
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#define va_dcl int va_alist;
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#define va_start(list) list = (char *) &va_alist
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#define va_end(list)
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#if (defined(__BUILTIN_VA_ARG_INCR) || defined(sparc) || defined(__sparc) || \
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defined(i386) || defined(__i386)) && !(defined(lint) || defined(__lint))
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#define va_arg(list, mode) ((mode*)__builtin_va_arg_incr((mode *)list))[0]
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#else
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#define va_arg(list, mode) ((mode *)(list += sizeof (mode)))[-1]
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif /* _VARARGS_H */
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