stdio-common/tst-sscanf.c

   1 /* Copyright (C) 2000-2024 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library 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 GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #include <array_length.h>
  19 #include <stdlib.h>
  20 #include <stdio.h>
  21 #include <locale.h>
  22
  23 #ifndef CHAR
  24 # define CHAR char
  25 # define L(str) str
  26 # define SSCANF sscanf
  27 #endif
  28
  29 const CHAR *str_double[] =
  30 {
  31   L("-.10000E+020.20000E+020.25000E+010.40000E+010.50000E+010.12500E+01"),
  32   L("0.10000E+020.20000E+020.25000E+010.40000E+010.50000E+010.12500E+01"),
  33   L("-1234567E0198765432E0912345678901987654321091234567890198765432109"),
  34   L("-0.1000E+020.20000E+020.25000E+010.40000E+010.50000E+010.12500E+01")
  35 };
  36
  37 const double val_double[] =
  38 {
  39   -.10000E+02, 0.20000E+02, 0.25000E+01, 0.40000E+01, 0.50000E+01, 0.12500E+01,
  40   0.10000E+02, 0.20000E+02, 0.25000E+01, 0.40000E+01, 0.50000E+01, 0.12500E+01,
  41   -1234567E01, 98765432E09, 12345678901.0, 98765432109.0, 12345678901.0,
  42     98765432109.0,
  43   -0.1000E+02, 0.20000E+02, 0.25000E+01, 0.40000E+01, 0.50000E+01, 0.12500E+01
  44 };
  45
  46 const CHAR *str_long[] =
  47 {
  48   L("-12345678987654321123456789987654321123456789987654321"),
  49   L("-12345678987654321123456789987654321123456789987654321"),
  50   L("-12,345,678987,654,321123,456,789987,654,321123,456,789987,654,321"),
  51   L("-12,345,678987,654,321123,456,789987,654,321123,456,789987,654,321")
  52 };
  53
  54 const CHAR *fmt_long[] =
  55 {
  56   L("%9ld%9ld%9ld%9ld%9ld%9ld"),
  57   L("%I9ld%I9ld%I9ld%I9ld%I9ld%I9ld"),
  58   L("%'11ld%'11ld%'11ld%'11ld%'11ld%'11ld"),
  59   L("%I'11ld%I'11ld%I'11ld%I'11ld%I'11ld%I'11ld")
  60 };
  61
  62 const long int val_long[] =
  63 {
  64   -12345678, 987654321, 123456789, 987654321, 123456789, 987654321
  65 };
  66
  67 struct test
  68 {
  69   const CHAR *str;
  70   const CHAR *fmt;
  71   int retval;
  72 } int_tests[] =
  73 {
  74   { L("foo\n"), L("foo\nbar"), -1 },
  75   { L("foo\n"), L("foo bar"), -1 },
  76   { L("foo\n"), L("foo %d"), -1 },
  77   { L("foo\n"), L("foo\n%d"), -1 },
  78   { L("foon"), L("foonbar"), -1 },
  79   { L("foon"), L("foon%d"), -1 },
  80   { L("foo "), L("foo bar"), -1 },
  81   { L("foo "), L("foo %d"), -1 },
  82   { L("foo\t"), L("foo\tbar"), -1 },
  83   { L("foo\t"), L("foo bar"), -1 },
  84   { L("foo\t"), L("foo %d"), -1 },
  85   { L("foo\t"), L("foo\t%d"), -1 },
  86   { L("foo"), L("foo"), 0 },
  87   { L("foon"), L("foo bar"), 0 },
  88   { L("foon"), L("foo %d"), 0 },
  89   { L("foo "), L("fooxbar"), 0 },
  90   { L("foo "), L("foox%d"), 0 },
  91   { L("foo bar"), L("foon"), 0 },
  92   { L("foo bar"), L("foo bar"), 0 },
  93   { L("foo bar"), L("foo %d"), 0 },
  94   { L("foo bar"), L("foon%d"), 0 },
  95   { L("foo (nil)"), L("foo %p"), 1},
  96   { L("foo (nil)"), L("foo %4p"), 0},
  97   { L("foo "), L("foo %n"), 0 },
  98   { L("foo%bar1"), L("foo%%bar%d"), 1 },
  99   /* Some OSes skip whitespace here while others don't.  */
 100   { L("foo \t %bar1"), L("foo%%bar%d"), 1 }
 101 };
 102
 103 struct test double_tests[] =
 104 {
 105   { L("-1"), L("%1g"), 0 },
 106   { L("-.1"), L("%2g"), 0 },
 107   { L("-inf"), L("%3g"), 0 },
 108   { L("+0"), L("%1g"),  },
 109   { L("-0x1p0"), L("%2g"), 1 },
 110   { L("-..1"), L("%g"), 0 },
 111   { L("-inf"), L("%g"), 1 }
 112 };
 113
 114 struct test2
 115 {
 116   const CHAR *str;
 117   const CHAR *fmt;
 118   int retval;
 119   char residual;
 120 } double_tests2[] =
 121 {
 122   { L("0e+0"), L("%g%c"), 1, 0 },
 123   { L("0xe+0"), L("%g%c"), 2, '+' },
 124   { L("0x.e+0"), L("%g%c"), 2, '+' },
 125 };
 126
 127 static int
 128 do_test (void)
 129 {
 130   double d[6];
 131   long l[6];
 132   int i, j;
 133   int tst_locale;
 134   int result = 0;
 135
 136   tst_locale = 1;
 137   if (tst_locale)
 138     if (setlocale (LC_ALL, "en_US.ISO-8859-1") == NULL)
 139       {
 140         puts ("Failed to set en_US locale, skipping locale related tests");
 141         tst_locale = 0;
 142       }
 143
 144   for (i = 0; i < 4; ++i)
 145     {
 146       if (SSCANF (str_double[i], L("%11lf%11lf%11lf%11lf%11lf%11lf"),
 147                   &d[0], &d[1], &d[2], &d[3], &d[4], &d[5]) != 6)
 148         {
 149           printf ("Double sscanf test %d wrong number of "
 150                   "assigned inputs\n", i);
 151           result = 1;
 152         }
 153       else
 154         for (j = 0; j < 6; ++j)
 155           if (d[j] != val_double[6 * i + j])
 156             {
 157               printf ("Double sscanf test %d failed (%g instead of %g)\n",
 158                       i, d[j], val_double[6 * i + j]);
 159               result = 1;
 160               break;
 161             }
 162     }
 163
 164   for (i = 0; i < 4; ++i)
 165     {
 166       if (SSCANF (str_long[i], fmt_long[i],
 167                   &l[0], &l[1], &l[2], &l[3], &l[4], &l[5]) != 6)
 168         {
 169           printf ("Integer sscanf test %d wrong number of "
 170                   "assigned inputs\n", i);
 171           result = 1;
 172         }
 173       else
 174         for (j = 0; j < 6; ++j)
 175           if (l[j] != val_long[j])
 176             {
 177               printf ("Integer sscanf test %d failed (%ld instead %ld)\n",
 178                       i, l[j], val_long[j]);
 179               result = 1;
 180               break;
 181             }
 182
 183       if (! tst_locale)
 184         break;
 185     }
 186
 187   for (i = 0; i < array_length (int_tests); ++i)
 188     {
 189       long dummy;
 190       int ret;
 191
 192       if ((ret = SSCANF (int_tests[i].str, int_tests[i].fmt,
 193                          &dummy)) != int_tests[i].retval)
 194         {
 195           printf ("int_tests[%d] returned %d != %d\n",
 196                   i, ret, int_tests[i].retval);
 197           result = 1;
 198         }
 199     }
 200
 201   for (i = 0; i < array_length (double_tests); ++i)
 202     {
 203       double dummy;
 204       int ret;
 205
 206       if ((ret = SSCANF (double_tests[i].str, double_tests[i].fmt,
 207                          &dummy)) != double_tests[i].retval)
 208         {
 209           printf ("double_tests[%d] returned %d != %d\n",
 210                   i, ret, double_tests[i].retval);
 211           result = 1;
 212         }
 213     }
 214
 215   for (i = 0; i < array_length (double_tests2); ++i)
 216     {
 217       double dummy;
 218       int ret;
 219       char c = 0;
 220
 221       if ((ret = SSCANF (double_tests2[i].str, double_tests2[i].fmt,
 222                          &dummy, &c)) != double_tests2[i].retval)
 223         {
 224           printf ("double_tests2[%d] returned %d != %d\n",
 225                   i, ret, double_tests2[i].retval);
 226           result = 1;
 227         }
 228       else if (ret == 2 && c != double_tests2[i].residual)
 229         {
 230           printf ("double_tests2[%d] stopped at '%c' != '%c'\n",
 231                   i, c, double_tests2[i].residual);
 232           result = 1;
 233         }
 234     }
 235
 236   /* BZ #16618
 237      The test will segfault during SSCANF if the buffer overflow
 238      is not fixed.  The size of `s` is such that it forces the use
 239      of malloc internally and this triggers the incorrect computation.
 240      Thus the value for SIZE is arbitrarily high enough that malloc
 241      is used.  */
 242   {
 243 #define SIZE 131072
 244     CHAR *s = malloc ((SIZE + 1) * sizeof (*s));
 245     if (s == NULL)
 246       abort ();
 247     for (size_t i = 0; i < SIZE; i++)
 248       s[i] = L('0');
 249     s[SIZE] = L('\0');
 250     int i = 42;
 251     /* Scan multi-digit zero into `i`.  */
 252     if (SSCANF (s, L("%d"), &i) != 1)
 253       {
 254         printf ("FAIL: bug16618: SSCANF did not read one input item.\n");
 255         result = 1;
 256       }
 257     if (i != 0)
 258       {
 259         printf ("FAIL: bug16618: Value of `i` was not zero as expected.\n");
 260         result = 1;
 261       }
 262     free (s);
 263     if (result != 1)
 264       printf ("PASS: bug16618: Did not crash.\n");
 265 #undef SIZE
 266   }
 267
 268
 269   return result;
 270 }
 271
 272 #define TEST_FUNCTION do_test ()
 273 #include "../test-skeleton.c"