1/* Test file for multiple mpfr.h inclusion and va_list related functions
2
3Copyright 2011-2023 Free Software Foundation, Inc.
4Contributed by the AriC and Caramba projects, INRIA.
5
6This file is part of the GNU MPFR Library.
7
8The GNU MPFR Library is free software; you can redistribute it and/or modify
9it under the terms of the GNU Lesser General Public License as published by
10the Free Software Foundation; either version 3 of the License, or (at your
11option) any later version.
12
13The GNU MPFR Library is distributed in the hope that it will be useful, but
14WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
16License for more details.
17
18You should have received a copy of the GNU Lesser General Public License
19along with the GNU MPFR Library; see the file COPYING.LESSER.  If not, see
20https://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
2151 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */
22
23#ifdef HAVE_CONFIG_H
24# include "config.h"
25#endif
26
27#if defined(HAVE_STDARG) && !defined(MPFR_USE_MINI_GMP)
28
29#if _MPFR_EXP_FORMAT == 4
30/* If mpfr_exp_t is defined as intmax_t, intmax_t must be defined before
31   the inclusion of mpfr.h (this test doesn't use mpfr-impl.h). */
32# include <stdint.h>
33#endif
34
35/* One of the goals of this test is to detect potential issues with the
36 * following case in user code:
37 *
38 * #include <some_lib.h>
39 * #include <stdarg.h>
40 * #define MPFR_USE_VA_LIST
41 * #include <mpfr.h>
42 *
43 * where some_lib.h has "#include <mpfr.h>". So, the mpfr.h header file
44 * is included multiple times, a first time without <stdarg.h> before,
45 * and a second time with <stdarg.h> support. We need to make sure that
46 * the second inclusion is not a no-op due to some #include guard. This
47 * was fixed in r7320.
48 *
49 * Note: one needs to make sure that optimizations do not drop the call
50 * to mpfr_vfprintf.
51 */
52#include <mpfr.h>
53
54#include <stdarg.h>
55#define MPFR_USE_VA_LIST /* necessary due to GMP bug concerning inclusions */
56#include <mpfr.h>
57
58#include <stdio.h>
59#define MPFR_USE_FILE /* necessary due to GMP bug concerning inclusions */
60#include <mpfr.h>
61
62#include "mpfr-test.h"
63
64static void
65test (FILE *fout, const char *fmt, ...)
66{
67  va_list ap;
68
69  va_start (ap, fmt);
70  mpfr_vfprintf (fout, fmt, ap);
71  va_end (ap);
72}
73
74int
75main (void)
76{
77  tests_start_mpfr ();
78  test (stdout, "");
79  tests_end_mpfr ();
80  return 0;
81}
82
83#else  /* HAVE_STDARG */
84
85/* The test is disabled. */
86
87int
88main (void)
89{
90  return 77;
91}
92
93#endif  /* HAVE_STDARG */
94