1  /* Test file for multiple mpfr.h inclusion and va_list related functions
       2  
       3  Copyright 2011-2023 Free Software Foundation, Inc.
       4  Contributed by the AriC and Caramba projects, INRIA.
       5  
       6  This file is part of the GNU MPFR Library.
       7  
       8  The GNU MPFR Library is free software; you can redistribute it and/or modify
       9  it under the terms of the GNU Lesser General Public License as published by
      10  the Free Software Foundation; either version 3 of the License, or (at your
      11  option) any later version.
      12  
      13  The GNU MPFR Library is distributed in the hope that it will be useful, but
      14  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
      15  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
      16  License for more details.
      17  
      18  You should have received a copy of the GNU Lesser General Public License
      19  along with the GNU MPFR Library; see the file COPYING.LESSER.  If not, see
      20  https://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
      21  51 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  
      64  static void
      65  test (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  
      74  int
      75  main (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  
      87  int
      88  main (void)
      89  {
      90    return 77;
      91  }
      92  
      93  #endif  /* HAVE_STDARG */