1  /* Test strtod functions handle signs of NaNs (bug 23007).
       2     Copyright (C) 2018-2023 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 <math.h>
      20  #include <stdlib.h>
      21  #include <wchar.h>
      22  
      23  #include <stdlib/tst-strtod.h>
      24  #include <support/check.h>
      25  
      26  #define CONCAT_(X, Y) X ## Y
      27  #define CONCAT(X, Y) CONCAT_ (X, Y)
      28  #define FNX(FN) CONCAT (FNPFX, FN)
      29  
      30  #define TEST_STRTOD(FSUF, FTYPE, FTOSTR, LSUF, CSUF)	\
      31  static int						\
      32  test_strto ## FSUF (void)				\
      33  {							\
      34    FTYPE val_pos = FNX (FSUF) (L_("nan"), NULL);		\
      35    FTYPE copy_pos = copysign ## CSUF (1, val_pos);	\
      36    TEST_VERIFY (isnan (val_pos) && copy_pos == 1);	\
      37    FTYPE val_neg = FNX (FSUF) (L_("-nan"), NULL);	\
      38    FTYPE copy_neg = copysign ## CSUF (1, val_neg);	\
      39    TEST_VERIFY (isnan (val_neg) && copy_neg == -1);	\
      40    return 0;						\
      41  }
      42  GEN_TEST_STRTOD_FOREACH (TEST_STRTOD)
      43  
      44  static int
      45  do_test (void)
      46  {
      47    return STRTOD_TEST_FOREACH (test_strto);
      48  }
      49  
      50  #include <support/test-driver.c>