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authorRoland McGrath <roland@gnu.org>1995-02-18 01:27:10 +0000
committerRoland McGrath <roland@gnu.org>1995-02-18 01:27:10 +0000
commit28f540f45bbacd939bfd07f213bcad2bf730b1bf (patch)
tree15f07c4c43d635959c6afee96bde71fb1b3614ee /sysdeps/generic/varargs.h
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initial import
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diff --git a/sysdeps/generic/varargs.h b/sysdeps/generic/varargs.h
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+/* Copyright (C) 1991 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA. */
+
+#ifndef _VARARGS_H
+
+#define _VARARGS_H 1
+#include <features.h>
+
+#ifdef __GNUC__
+
+#define va_alist __builtin_va_alist
+#define va_dcl int __builtin_va_alist;
+#define va_list char *
+
+#ifdef __sparc__
+#define va_start(AP) \
+ (__builtin_saveregs (), \
+ AP = ((void *) &__builtin_va_alist))
+#else
+#define va_start(AP) AP=(char *) &__builtin_va_alist
+#endif
+#define va_end(AP)
+
+#define __va_rounded_size(TYPE) \
+ (((sizeof (TYPE) + sizeof (int) - 1) / sizeof (int)) * sizeof (int))
+
+#define va_arg(AP, TYPE) \
+ (*((TYPE *) (AP += __va_rounded_size (TYPE), \
+ AP - __va_rounded_size (TYPE))))
+
+#else /* Not GCC. */
+
+/* Implement varargs on top of our stdarg implementation. */
+
+#include <stdarg.h>
+
+#define va_alist __va_fakearg
+#define va_dcl int __va_fakearg;
+
+#undef va_start
+#define va_start(ap) (__va_start((ap), __va_fakearg), \
+ (ap) -= sizeof(__va_fakearg))
+
+#endif /* GCC. */
+
+#endif /* varargs.h */