tests/test-stdio.c

   1 /* Test of <stdio.h> substitute.
   2    Copyright (C) 2007, 2009-2024 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 off64_t t6;
  40
  41 #include <string.h>
  42
  43 #include "signed-nan.h"
  44 #include "signed-snan.h"
  45 #include "macros.h"
  46
  47 int
  48 main (void)
  49 {
  50   {
  51     double value1;
  52     char buf[64];
  53
  54     value1 = positive_NaNd();
  55     sprintf (buf, "%g", value1);
  56     ASSERT (strlen (buf) <= _PRINTF_NAN_LEN_MAX);
  57
  58     value1 = negative_NaNd();
  59     sprintf (buf, "%g", value1);
  60     ASSERT (strlen (buf) <= _PRINTF_NAN_LEN_MAX);
  61   }
  62 #if defined DBL_EXPBIT0_WORD && defined DBL_EXPBIT0_BIT
  63   /* Check the value of _PRINTF_NAN_LEN_MAX.  */
  64   {
  65     double value1;
  66     memory_double value2;
  67     char buf[64];
  68
  69     value1 = positive_SNaNd();
  70     sprintf (buf, "%g", value1);
  71     ASSERT (strlen (buf) <= _PRINTF_NAN_LEN_MAX);
  72
  73     value1 = negative_SNaNd();
  74     sprintf (buf, "%g", value1);
  75     ASSERT (strlen (buf) <= _PRINTF_NAN_LEN_MAX);
  76
  77     value2.value = positive_NaNd ();
  78     #if DBL_EXPBIT0_BIT == 20
  79     value2.word[DBL_EXPBIT0_WORD] ^= 0x54321;
  80     #endif
  81     sprintf (buf, "%g", value2.value);
  82     ASSERT (strlen (buf) <= _PRINTF_NAN_LEN_MAX);
  83
  84     value2.value = negative_NaNd ();
  85     #if DBL_EXPBIT0_BIT == 20
  86     value2.word[DBL_EXPBIT0_WORD] ^= 0x54321;
  87     #endif
  88     sprintf (buf, "%g", value2.value);
  89     ASSERT (strlen (buf) <= _PRINTF_NAN_LEN_MAX);
  90   }
  91 #endif
  92
  93   return test_exit_status;
  94 }