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      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 */
     94