41 lines
1.0 KiB
C
41 lines
1.0 KiB
C
/* $Id$ */
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/* Copyright (c) 2018 Pierre Pronchery <khorben@defora.org> */
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/* This file is part of DeforaOS uKernel */
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#ifndef UKERNEL_STDARG_H
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# define UKERNEL_STDARG_H
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/* types */
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# ifndef va_list
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# define va_list va_list
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# if defined(__GNUC__) && __GNUC__ >= 3
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typedef __builtin_va_list va_list;
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# else
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# warning Unsupported architecture: va_list is not supported
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typedef char * va_list;
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# endif
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# endif
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/* macros */
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# if defined(__GNUC__) && __GNUC__ >= 3
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# define va_start(ap, arg) __builtin_va_start((ap), (arg))
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# define va_arg __builtin_va_arg
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# define va_copy __builtin_va_copy
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# define va_end(ap) __builtin_va_end((ap))
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# else
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/* XXX works only in particular cases */
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# define va_start(ap, arg) ((ap) = ((va_list)&(arg)) \
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+ ((sizeof(long) > sizeof(arg)) ? sizeof(long) : sizeof(arg)))
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# define va_arg(ap, type) *(type *)(ap), \
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((ap) += ((sizeof(long) > sizeof(type)) ? sizeof(long) : sizeof(type)))
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# define va_copy(copy, arg) ((copy) = (arg))
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# define va_end(ap)
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# endif
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#endif /* !UKERNEL_STDARG_H */
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