stdio-common/tst-printfsz-islongdouble.c

   1 /* Test for the behaviour of 'is_long_double' in printf_size.
   2    Copyright (C) 2018-2024 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <printf.h>
  20 #include <stdio.h>
  21 #include <string.h>
  22
  23 #include <support/check.h>
  24
  25 static int
  26 do_test (void)
  27 {
  28   double d = 2000;
  29   double *dptr = &d;
  30   long double ld = 4000;
  31   long double *ldptr = & ld;
  32   struct printf_info info;
  33
  34   memset (&info, 0, sizeof (info));
  35   info.spec = L'f';
  36
  37   /* Print a value with double type.  */
  38   printf_size (stdout, &info, (void *) &dptr);
  39
  40   /* Printf a value with long double type.  */
  41   info.is_long_double = 1;
  42   printf_size (stdout, &info, (void *) &ldptr);
  43
  44   /* Setting both 'is_long_double' and 'is_binary128' to one is out of
  45      the scope of this test, because such configuration is only valid
  46      when _Float128 and long double are ABI-distinct (which is not
  47      always true in this arch-independent test).  */
  48   return 0;
  49 }
  50
  51 #include <support/test-driver.c>