string/test-strncat.c

   1 /* Test strncat functions.
   2    Copyright (C) 2011-2021 Free Software Foundation, Inc.
   3    Contributed by Intel Corporation.
   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 #define TEST_MAIN
  20 #ifndef WIDE
  21 # define TEST_NAME "strncat"
  22 #else
  23 # define TEST_NAME "wcsncat"
  24 #endif /* WIDE */
  25 #include "test-string.h"
  26
  27 #ifndef WIDE
  28 # define STRNCAT strncat
  29 # define CHAR char
  30 # define UCHAR unsigned char
  31 # define SIMPLE_STRNCAT simple_strncat
  32 # define STUPID_STRNCAT stupid_strncat
  33 # define STRLEN strlen
  34 # define MEMSET memset
  35 # define MEMCPY memcpy
  36 # define MEMCMP memcmp
  37 # define BIG_CHAR CHAR_MAX
  38 # define SMALL_CHAR 127
  39 #else
  40 # include <wchar.h>
  41 # define STRNCAT wcsncat
  42 # define CHAR wchar_t
  43 # define UCHAR wchar_t
  44 # define SIMPLE_STRNCAT simple_wcsncat
  45 # define STUPID_STRNCAT stupid_wcsncat
  46 # define STRLEN wcslen
  47 # define MEMSET wmemset
  48 # define MEMCPY wmemcpy
  49 # define MEMCMP wmemcmp
  50 # define BIG_CHAR WCHAR_MAX
  51 # define SMALL_CHAR 1273
  52 #endif /* WIDE */
  53
  54 typedef CHAR *(*proto_t) (CHAR *, const CHAR *, size_t);
  55 CHAR *STUPID_STRNCAT (CHAR *, const CHAR *, size_t);
  56 CHAR *SIMPLE_STRNCAT (CHAR *, const CHAR *, size_t);
  57
  58 IMPL (STUPID_STRNCAT, 0)
  59 IMPL (STRNCAT, 2)
  60
  61 CHAR *
  62 STUPID_STRNCAT (CHAR *dst, const CHAR *src, size_t n)
  63 {
  64   CHAR *ret = dst;
  65   while (*dst++ != '\0');
  66   --dst;
  67   while (n--)
  68     if ((*dst++ = *src++) == '\0')
  69       return ret;
  70   *dst = '\0';
  71   return ret;
  72 }
  73
  74 static void
  75 do_one_test (impl_t *impl, CHAR *dst, const CHAR *src, size_t n)
  76 {
  77   size_t k = STRLEN (dst);
  78   if (CALL (impl, dst, src, n) != dst)
  79     {
  80       error (0, 0, "Wrong result in function %s %p != %p", impl->name,
  81              CALL (impl, dst, src, n), dst);
  82       ret = 1;
  83       return;
  84     }
  85
  86   size_t len = STRLEN (src);
  87   if (MEMCMP (dst + k, src, len + 1 > n ? n : len + 1) != 0)
  88     {
  89       error (0, 0, "Incorrect concatenation in function %s",
  90              impl->name);
  91       ret = 1;
  92       return;
  93     }
  94   if (n < len && dst[k + n] != '\0')
  95     {
  96       error (0, 0, "There is no zero in the end of output string in %s",
  97              impl->name);
  98       ret = 1;
  99       return;
 100     }
 101 }
 102
 103 static void
 104 do_test (size_t align1, size_t align2, size_t len1, size_t len2,
 105          size_t n, int max_char)
 106 {
 107   size_t i;
 108   CHAR *s1, *s2;
 109
 110   align1 &= 7;
 111   if ((align1 + len1) * sizeof (CHAR) >= page_size)
 112     return;
 113   if ((align1 + n) * sizeof (CHAR) > page_size)
 114     return;
 115   align2 &= 7;
 116   if ((align2 + len1 + len2) * sizeof (CHAR) >= page_size)
 117     return;
 118   if ((align2 + len1 + n) * sizeof (CHAR) > page_size)
 119     return;
 120   s1 = (CHAR *) (buf1) + align1;
 121   s2 = (CHAR *) (buf2) + align2;
 122
 123   for (i = 0; i < len1; ++i)
 124     s1[i] = 32 + 23 * i % (max_char - 32);
 125   s1[len1] = '\0';
 126
 127   for (i = 0; i < len2; i++)
 128     s2[i] = 32 + 23 * i % (max_char - 32);
 129
 130   FOR_EACH_IMPL (impl, 0)
 131     {
 132       s2[len2] = '\0';
 133       do_one_test (impl, s2, s1, n);
 134     }
 135 }
 136
 137 static void
 138 do_random_tests (void)
 139 {
 140   size_t i, j, n, align1, align2, len1, len2, N;
 141   UCHAR *p1 = (UCHAR *) (buf1 + page_size) - 512;
 142   UCHAR *p2 = (UCHAR *) (buf2 + page_size) - 512;
 143   UCHAR *p3 = (UCHAR *) buf1;
 144   UCHAR *res;
 145   fprintf (stdout, "Number of iterations in random test = %zd\n",
 146            ITERATIONS);
 147   for (n = 0; n < ITERATIONS; n++)
 148     {
 149       N = random () & 255;
 150       align1 = random () & 31;
 151       if (random () & 1)
 152         align2 = random () & 31;
 153       else
 154         align2 = align1 + (random () & 24);
 155       len1 = random () & 511;
 156       if (len1 + align2 > 512)
 157         len2 = random () & 7;
 158       else
 159         len2 = (512 - len1 - align2) * (random () & (1024 * 1024 - 1))
 160           / (1024 * 1024);
 161       j = align1;
 162       if (align2 + len2 > j)
 163         j = align2 + len2;
 164       if (len1 + j >= 511)
 165         len1 = 510 - j - (random () & 7);
 166       if (len1 >= 512)
 167         len1 = 0;
 168       if (align1 + len1 < 512 - 8)
 169         {
 170           j = 510 - align1 - len1 - (random () & 31);
 171           if (j > 0 && j < 512)
 172             align1 += j;
 173         }
 174       j = len1 + align1 + 64;
 175       if (j > 512)
 176         j = 512;
 177       for (i = 0; i < j; i++)
 178         {
 179           if (i == len1 + align1)
 180             p1[i] = 0;
 181           else
 182             {
 183               p1[i] = random () & BIG_CHAR;
 184               if (i >= align1 && i < len1 + align1 && !p1[i])
 185                 p1[i] = (random () & SMALL_CHAR) + 3;
 186             }
 187         }
 188       for (i = 0; i < len2; i++)
 189         {
 190           p3[i] = random () & BIG_CHAR;
 191           if (!p3[i])
 192             p3[i] = (random () & SMALL_CHAR) + 3;
 193         }
 194       p3[len2] = 0;
 195
 196       FOR_EACH_IMPL (impl, 1)
 197         {
 198           MEMSET (p2 - 64, '\1', align2 + 64);
 199           MEMSET (p2 + align2 + len2 + 1, '\1', 512 - align2 - len2 - 1);
 200           MEMCPY (p2 + align2, p3, len2 + 1);
 201           res = (UCHAR *) CALL (impl, (CHAR *) (p2 + align2),
 202                                 (CHAR *) (p1 + align1), N);
 203           if (res != p2 + align2)
 204             {
 205               error (0, 0, "Iteration %zd - wrong result in function %s "
 206                      "(%zd, %zd, %zd, %zd, %zd) %p != %p",
 207                      n, impl->name, align1, align2, len1, len2, N,
 208                      res, p2 + align2);
 209               ret = 1;
 210             }
 211           for (j = 0; j < align2 + 64; ++j)
 212             {
 213               if (p2[j - 64] != '\1')
 214                 {
 215                   error (0, 0, "Iteration %zd - garbage before dst, %s "
 216                          "%zd, %zd, %zd, %zd, %zd)",
 217                          n, impl->name, align1, align2, len1, len2, N);
 218                   ret = 1;
 219                   break;
 220                 }
 221             }
 222           if (MEMCMP (p2 + align2, p3, len2))
 223             {
 224               error (0, 0, "Iteration %zd - garbage in string before, %s "
 225                      "(%zd, %zd, %zd, %zd, %zd)",
 226                      n, impl->name, align1, align2, len1, len2, N);
 227               ret = 1;
 228             }
 229
 230           if ((len1 + 1) > N)
 231             j = align2 + N + 1 + len2;
 232           else
 233             j = align2 + len1 + 1 + len2;
 234           for (; j < 512; ++j)
 235             {
 236               if (p2[j] != '\1')
 237                 {
 238                   error (0, 0, "Iteration %zd - garbage after, %s "
 239                          "(%zd, %zd, %zd, %zd, %zd)",
 240                          n, impl->name, align1, align2, len1, len2, N);
 241                   ret = 1;
 242                   break;
 243                 }
 244             }
 245           if (len1 + 1 > N)
 246             {
 247               if (p2[align2 + N + len2] != '\0')
 248                 {
 249                   error (0, 0, "Iteration %zd - there is no zero at the "
 250                          "end of output string, %s (%zd, %zd, %zd, %zd, %zd)",
 251                          n, impl->name, align1, align2, len1, len2, N);
 252                   ret = 1;
 253                 }
 254             }
 255           if (MEMCMP (p1 + align1, p2 + align2 + len2,
 256                       (len1 + 1) > N ? N : len1 + 1))
 257             {
 258               error (0, 0, "Iteration %zd - different strings, %s "
 259                      "(%zd, %zd, %zd, %zd, %zd)",
 260                      n, impl->name, align1, align2, len1, len2, N);
 261               ret = 1;
 262             }
 263         }
 264     }
 265 }
 266
 267 int
 268 test_main (void)
 269 {
 270   size_t i, n;
 271
 272   test_init ();
 273
 274   printf ("%28s", "");
 275   FOR_EACH_IMPL (impl, 0)
 276     printf ("\t%s", impl->name);
 277   putchar ('\n');
 278
 279   for (n = 2; n <= 2048; n*=4)
 280     {
 281       do_test (0, 2, 2, 2, n, SMALL_CHAR);
 282       do_test (0, 0, 4, 4, n, SMALL_CHAR);
 283       do_test (4, 0, 4, 4, n, BIG_CHAR);
 284       do_test (0, 0, 8, 8, n, SMALL_CHAR);
 285       do_test (0, 8, 8, 8, n, SMALL_CHAR);
 286
 287       do_test (0, 2, 2, 2, SIZE_MAX, SMALL_CHAR);
 288       do_test (0, 0, 4, 4, SIZE_MAX, SMALL_CHAR);
 289       do_test (4, 0, 4, 4, SIZE_MAX, BIG_CHAR);
 290       do_test (0, 0, 8, 8, SIZE_MAX, SMALL_CHAR);
 291       do_test (0, 8, 8, 8, SIZE_MAX, SMALL_CHAR);
 292
 293       for (i = 1; i < 8; ++i)
 294         {
 295           do_test (0, 0, 8 << i, 8 << i, n, SMALL_CHAR);
 296           do_test (8 - i, 2 * i, 8 << i, 8 << i, n, SMALL_CHAR);
 297           do_test (0, 0, 8 << i, 2 << i, n, SMALL_CHAR);
 298           do_test (8 - i, 2 * i, 8 << i, 2 << i, n, SMALL_CHAR);
 299
 300           do_test (0, 0, 8 << i, 8 << i, SIZE_MAX, SMALL_CHAR);
 301           do_test (8 - i, 2 * i, 8 << i, 8 << i, SIZE_MAX, SMALL_CHAR);
 302           do_test (0, 0, 8 << i, 2 << i, SIZE_MAX, SMALL_CHAR);
 303           do_test (8 - i, 2 * i, 8 << i, 2 << i, SIZE_MAX, SMALL_CHAR);
 304         }
 305
 306       for (i = 1; i < 8; ++i)
 307         {
 308           do_test (i, 2 * i, 8 << i, 1, n, SMALL_CHAR);
 309           do_test (2 * i, i, 8 << i, 1, n, BIG_CHAR);
 310           do_test (i, i, 8 << i, 10, n, SMALL_CHAR);
 311
 312           do_test (i, 2 * i, 8 << i, 1, SIZE_MAX, SMALL_CHAR);
 313           do_test (2 * i, i, 8 << i, 1, SIZE_MAX, BIG_CHAR);
 314           do_test (i, i, 8 << i, 10, SIZE_MAX, SMALL_CHAR);
 315         }
 316     }
 317
 318   do_random_tests ();
 319   return ret;
 320 }
 321
 322 #include <support/test-driver.c>