tests/test-stdio.c

   1 /* Test of <stdio.h> substitute.
   2    Copyright (C) 2007, 2009-2023 Free Software Foundation, Inc.
   3
   4    This program is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation, either version 3 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  16
  17 /* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
  18
  19 #include <config.h>
  20
  21 #include <stdio.h>
  22
  23 /* Check that the various SEEK_* macros are defined.  */
  24 int sk[] = { SEEK_CUR, SEEK_END, SEEK_SET };
  25
  26 /* Check that the _PRINTF_NAN_LEN_MAX macro is defined.  */
  27 int pnlm[] = { _PRINTF_NAN_LEN_MAX };
  28
  29 /* Check that NULL can be passed through varargs as a pointer type,
  30    per POSIX 2008.  */
  31 static_assert (sizeof NULL == sizeof (void *));
  32
  33 /* Check that the types are all defined.  */
  34 fpos_t t1;
  35 off_t t2;
  36 size_t t3;
  37 ssize_t t4;
  38 va_list t5;
  39
  40 #include <string.h>
  41
  42 #include "signed-nan.h"
  43 #include "signed-snan.h"
  44 #include "macros.h"
  45
  46 int
  47 main (void)
  48 {
  49   {
  50     double value1;
  51     char buf[64];
  52
  53     value1 = positive_NaNd();
  54     sprintf (buf, "%g", value1);
  55     ASSERT (strlen (buf) <= _PRINTF_NAN_LEN_MAX);
  56
  57     value1 = negative_NaNd();
  58     sprintf (buf, "%g", value1);
  59     ASSERT (strlen (buf) <= _PRINTF_NAN_LEN_MAX);
  60   }
  61 #if defined DBL_EXPBIT0_WORD && defined DBL_EXPBIT0_BIT
  62   /* Check the value of _PRINTF_NAN_LEN_MAX.  */
  63   {
  64     double value1;
  65     memory_double value2;
  66     char buf[64];
  67
  68     value1 = positive_SNaNd();
  69     sprintf (buf, "%g", value1);
  70     ASSERT (strlen (buf) <= _PRINTF_NAN_LEN_MAX);
  71
  72     value1 = negative_SNaNd();
  73     sprintf (buf, "%g", value1);
  74     ASSERT (strlen (buf) <= _PRINTF_NAN_LEN_MAX);
  75
  76     value2.value = positive_NaNd ();
  77     #if DBL_EXPBIT0_BIT == 20
  78     value2.word[DBL_EXPBIT0_WORD] ^= 0x54321;
  79     #endif
  80     sprintf (buf, "%g", value2.value);
  81     ASSERT (strlen (buf) <= _PRINTF_NAN_LEN_MAX);
  82
  83     value2.value = negative_NaNd ();
  84     #if DBL_EXPBIT0_BIT == 20
  85     value2.word[DBL_EXPBIT0_WORD] ^= 0x54321;
  86     #endif
  87     sprintf (buf, "%g", value2.value);
  88     ASSERT (strlen (buf) <= _PRINTF_NAN_LEN_MAX);
  89   }
  90 #endif
  91
  92   return 0;
  93 }