mes/scaffold/tests/70-stdarg.c
Jan Nieuwenhuizen 3ed82d7010
mescc: Mes C Library: Cleanup includes.
* include/mes/lib-mini.h: Move from include/libmes-mini.h.  Update users.
* include/mes/lib.h: Move from include/libmes.h.  Update users.
2019-05-08 00:25:41 +02:00

109 lines
2.2 KiB
C

/* -*-comment-start: "//";comment-end:""-*-
* GNU Mes --- Maxwell Equations of Software
* Copyright © 2017,2018 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
*
* This file is part of GNU Mes.
*
* GNU Mes is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or (at
* your option) any later version.
*
* GNU Mes 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU Mes. If not, see <http://www.gnu.org/licenses/>.
*/
#include <mes/lib.h>
#include <stdarg.h>
int
//stdarg1 (long one, ...)
stdarg1 (long* one, ...)
{
va_list ap;
char c;
int r;
va_start (ap, one);
#if __GNUC__ && __x86_64__
#define __FUNCTION_ARGS 1
ap += (__FOO_VARARGS + (__FUNCTION_ARGS << 1)) << 3;
#undef __FUNCTION_ARGS
#endif
c = va_arg (ap, char);
r = c;
eputs ("c:"); eputs (itoa (c)); eputs ("\n");
va_end (ap);
return r;
}
int
///stdarg2 (long one, long two, ...)
stdarg2 (long* one, long* two, ...)
{
va_list ap;
char c;
int r;
va_start (ap, two);
#if __GNUC__ && __x86_64__
#define __FUNCTION_ARGS 2
ap += (__FOO_VARARGS + (__FUNCTION_ARGS << 1)) << 3;
#undef __FUNCTION_ARGS
#endif
c = va_arg (ap, char);
r = c;
eputs ("c:"); eputs (itoa (c)); eputs ("\n");
va_end (ap);
return r;
}
int
//stdarg3 (long one, long two, long three, ...)
stdarg3 (long *one, long* two, long* three, ...)
{
va_list ap;
char c;
int r;
va_start (ap, three);
#if __GNUC__ && __x86_64__
#define __FUNCTION_ARGS 3
ap += (__FOO_VARARGS + (__FUNCTION_ARGS << 1)) << 3;
#undef __FUNCTION_ARGS
#endif
c = va_arg (ap, char);
r = c;
eputs ("c:"); eputs (itoa (c)); eputs ("\n");
va_end (ap);
return r;
}
int
main ()
{
char c = 'm';
char buf[20];
if (stdarg1 (-1, c) != c)
return 1;
c = 'w';
if (stdarg2 (-1, -2, c) != c)
return 2;
c = 'g';
if (stdarg3 (-1, -2, -3, c) != c)
return 3;
return 0;
}