stdio-common/tst-vfprintf-width-prec-alloc.c

   1 /* Test large width or precision does not involve large allocation.
   2    Copyright (C) 2020-2024 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 <stdio.h>
  20 #include <sys/resource.h>
  21 #include <support/check.h>
  22
  23 char test_string[] = "test";
  24
  25 static int
  26 do_test (void)
  27 {
  28   struct rlimit limit;
  29   TEST_VERIFY_EXIT (getrlimit (RLIMIT_AS, &limit) == 0);
  30   limit.rlim_cur = 200 * 1024 * 1024;
  31   TEST_VERIFY_EXIT (setrlimit (RLIMIT_AS, &limit) == 0);
  32   FILE *fp = fopen ("/dev/null", "w");
  33   TEST_VERIFY_EXIT (fp != NULL);
  34   TEST_COMPARE (fprintf (fp, "%1000000000d", 1), 1000000000);
  35   TEST_COMPARE (fprintf (fp, "%.1000000000s", test_string), 4);
  36   TEST_COMPARE (fprintf (fp, "%1000000000d %1000000000d", 1, 2), 2000000001);
  37   TEST_COMPARE (fprintf (fp, "%2$.*1$s", 0x7fffffff, test_string), 4);
  38   return 0;
  39 }
  40
  41 #include <support/test-driver.c>