string/test-strncasecmp.c

   1 /* Test and measure strncasecmp functions.
   2    Copyright (C) 1999-2017 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Written by Jakub Jelinek <jakub@redhat.com>, 1999.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #include <locale.h>
  21 #include <ctype.h>
  22 #define TEST_MAIN
  23 #define TEST_NAME "strncasecmp"
  24 #include "test-string.h"
  25
  26 typedef int (*proto_t) (const char *, const char *, size_t);
  27 static int simple_strncasecmp (const char *, const char *, size_t);
  28 static int stupid_strncasecmp (const char *, const char *, size_t);
  29
  30 IMPL (stupid_strncasecmp, 0)
  31 IMPL (simple_strncasecmp, 0)
  32 IMPL (strncasecmp, 1)
  33
  34 static int
  35 simple_strncasecmp (const char *s1, const char *s2, size_t n)
  36 {
  37   int ret;
  38
  39   if (n == 0)
  40     return 0;
  41
  42   while ((ret = ((unsigned char) tolower (*s1)
  43                  - (unsigned char) tolower (*s2))) == 0
  44          && *s1++)
  45     {
  46       if (--n == 0)
  47         return 0;
  48       ++s2;
  49     }
  50   return ret;
  51 }
  52
  53 static int
  54 stupid_strncasecmp (const char *s1, const char *s2, size_t max)
  55 {
  56   size_t ns1 = strlen (s1) + 1;
  57   size_t ns2 = strlen (s2) + 1;
  58   size_t n = ns1 < ns2 ? ns1 : ns2;
  59   if (n > max)
  60     n = max;
  61   int ret = 0;
  62
  63   while (n--)
  64     {
  65       if ((ret = ((unsigned char) tolower (*s1)
  66                   - (unsigned char) tolower (*s2))) != 0)
  67         break;
  68       ++s1;
  69       ++s2;
  70     }
  71   return ret;
  72 }
  73
  74 static int
  75 check_result (impl_t *impl, const char *s1, const char *s2, size_t n,
  76               int exp_result)
  77 {
  78   int result = CALL (impl, s1, s2, n);
  79   if ((exp_result == 0 && result != 0)
  80       || (exp_result < 0 && result >= 0)
  81       || (exp_result > 0 && result <= 0))
  82     {
  83       error (0, 0, "Wrong result in function %s %d %d", impl->name,
  84              result, exp_result);
  85       ret = 1;
  86       return -1;
  87     }
  88
  89   return 0;
  90 }
  91
  92 static void
  93 do_one_test (impl_t *impl, const char *s1, const char *s2, size_t n,
  94              int exp_result)
  95 {
  96   if (check_result (impl, s1, s2, n, exp_result) < 0)
  97     return;
  98 }
  99
 100 static void
 101 do_test (size_t align1, size_t align2, size_t n, size_t len, int max_char,
 102          int exp_result)
 103 {
 104   size_t i;
 105   char *s1, *s2;
 106
 107   if (len == 0)
 108     return;
 109
 110   align1 &= 7;
 111   if (align1 + len + 1 >= page_size)
 112     return;
 113
 114   align2 &= 7;
 115   if (align2 + len + 1 >= page_size)
 116     return;
 117
 118   s1 = (char *) (buf1 + align1);
 119   s2 = (char *) (buf2 + align2);
 120
 121   for (i = 0; i < len; i++)
 122     {
 123       s1[i] = toupper (1 + 23 * i % max_char);
 124       s2[i] = tolower (s1[i]);
 125     }
 126
 127   s1[len] = s2[len] = 0;
 128   s1[len + 1] = 23;
 129   s2[len + 1] = 24 + exp_result;
 130   if ((s2[len - 1] == 'z' && exp_result == -1)
 131       || (s2[len - 1] == 'a' && exp_result == 1))
 132     s1[len - 1] += exp_result;
 133   else
 134     s2[len - 1] -= exp_result;
 135
 136   FOR_EACH_IMPL (impl, 0)
 137     do_one_test (impl, s1, s2, n, exp_result);
 138 }
 139
 140 static void
 141 do_random_tests (void)
 142 {
 143   size_t i, j, n, align1, align2, pos, len1, len2;
 144   int result;
 145   long r;
 146   unsigned char *p1 = buf1 + page_size - 512;
 147   unsigned char *p2 = buf2 + page_size - 512;
 148
 149   for (n = 0; n < ITERATIONS; n++)
 150     {
 151       align1 = random () & 31;
 152       if (random () & 1)
 153         align2 = random () & 31;
 154       else
 155         align2 = align1 + (random () & 24);
 156       pos = random () & 511;
 157       j = align1 > align2 ? align1 : align2;
 158       if (pos + j >= 511)
 159         pos = 510 - j - (random () & 7);
 160       len1 = random () & 511;
 161       if (pos >= len1 && (random () & 1))
 162         len1 = pos + (random () & 7);
 163       if (len1 + j >= 512)
 164         len1 = 511 - j - (random () & 7);
 165       if (pos >= len1)
 166         len2 = len1;
 167       else
 168         len2 = len1 + (len1 != 511 - j ? random () % (511 - j - len1) : 0);
 169       j = (pos > len2 ? pos : len2) + align1 + 64;
 170       if (j > 512)
 171         j = 512;
 172       for (i = 0; i < j; ++i)
 173         {
 174           p1[i] = tolower (random () & 255);
 175           if (i < len1 + align1 && !p1[i])
 176             {
 177               p1[i] = tolower (random () & 255);
 178               if (!p1[i])
 179                 p1[i] = tolower (1 + (random () & 127));
 180             }
 181         }
 182       for (i = 0; i < j; ++i)
 183         {
 184           p2[i] = toupper (random () & 255);
 185           if (i < len2 + align2 && !p2[i])
 186             {
 187               p2[i] = toupper (random () & 255);
 188               if (!p2[i])
 189                 toupper (p2[i] = 1 + (random () & 127));
 190             }
 191         }
 192
 193       result = 0;
 194       memcpy (p2 + align2, p1 + align1, pos);
 195       if (pos < len1)
 196         {
 197           if (tolower (p2[align2 + pos]) == p1[align1 + pos])
 198             {
 199               p2[align2 + pos] = toupper (random () & 255);
 200               if (tolower (p2[align2 + pos]) == p1[align1 + pos])
 201                 p2[align2 + pos] = toupper (p1[align1 + pos]
 202                                             + 3 + (random () & 127));
 203             }
 204
 205           if (p1[align1 + pos] < tolower (p2[align2 + pos]))
 206             result = -1;
 207           else
 208             result = 1;
 209         }
 210       p1[len1 + align1] = 0;
 211       p2[len2 + align2] = 0;
 212
 213       FOR_EACH_IMPL (impl, 1)
 214         {
 215           r = CALL (impl, (char *) (p1 + align1), (char *) (p2 + align2),
 216                     pos + 1 + (random () & 255));
 217           /* Test whether on 64-bit architectures where ABI requires
 218              callee to promote has the promotion been done.  */
 219           asm ("" : "=g" (r) : "0" (r));
 220           if ((r == 0 && result)
 221               || (r < 0 && result >= 0)
 222               || (r > 0 && result <= 0))
 223             {
 224               error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %zd, %zd, %zd, %zd) %ld != %d, p1 %p p2 %p",
 225                      n, impl->name, align1, align2, len1, len2, pos, r, result, p1, p2);
 226               ret = 1;
 227             }
 228         }
 229     }
 230 }
 231
 232 /* Regression test for BZ #12205 */
 233 static void
 234 bz12205 (void)
 235 {
 236   static char cp [4096+16] __attribute__ ((aligned(4096)));
 237   static char gotrel[4096] __attribute__ ((aligned(4096)));
 238   char *s1 = cp + 0xffa;
 239   char *s2 = gotrel + 0xcbe;
 240   int exp_result;
 241   size_t n = 6;
 242
 243   strcpy (s1, "gottpoff");
 244   strcpy (s2, "GOTPLT");
 245
 246   exp_result = simple_strncasecmp (s1, s2, n);
 247   FOR_EACH_IMPL (impl, 0)
 248     check_result (impl, s1, s2, n, exp_result);
 249 }
 250
 251 /* Regression test for BZ #14195 */
 252 static void
 253 bz14195 (void)
 254 {
 255   const char *empty_string  = "";
 256   FOR_EACH_IMPL (impl, 0)
 257     check_result (impl, empty_string, "", 5, 0);
 258 }
 259
 260 static void
 261 test_locale (const char *locale)
 262 {
 263   size_t i;
 264
 265   if (setlocale (LC_CTYPE, locale) == NULL)
 266     {
 267       error (0, 0, "cannot set locale \"%s\"", locale);
 268       ret = 1;
 269     }
 270
 271   bz12205 ();
 272   bz14195 ();
 273
 274   printf ("%23s", locale);
 275   FOR_EACH_IMPL (impl, 0)
 276     printf ("\t%s", impl->name);
 277   putchar ('\n');
 278
 279   for (i = 1; i < 16; ++i)
 280     {
 281       do_test (i, i, i - 1, i, 127, 0);
 282
 283       do_test (i, i, i, i, 127, 0);
 284       do_test (i, i, i, i, 127, 1);
 285       do_test (i, i, i, i, 127, -1);
 286
 287       do_test (i, i, i + 1, i, 127, 0);
 288       do_test (i, i, i + 1, i, 127, 1);
 289       do_test (i, i, i + 1, i, 127, -1);
 290     }
 291
 292   for (i = 1; i < 10; ++i)
 293     {
 294       do_test (0, 0, (2 << i) - 1, 2 << i, 127, 0);
 295       do_test (0, 0, 2 << i, 2 << i, 254, 0);
 296       do_test (0, 0, (2 << i) + 1, 2 << i, 127, 0);
 297
 298       do_test (0, 0, (2 << i) + 1, 2 << i, 254, 0);
 299
 300       do_test (0, 0, 2 << i, 2 << i, 127, 1);
 301       do_test (0, 0, (2 << i) + 10, 2 << i, 127, 1);
 302
 303       do_test (0, 0, 2 << i, 2 << i, 254, 1);
 304       do_test (0, 0, (2 << i) + 10, 2 << i, 254, 1);
 305
 306       do_test (0, 0, 2 << i, 2 << i, 127, -1);
 307       do_test (0, 0, (2 << i) + 10, 2 << i, 127, -1);
 308
 309       do_test (0, 0, 2 << i, 2 << i, 254, -1);
 310       do_test (0, 0, (2 << i) + 10, 2 << i, 254, -1);
 311     }
 312
 313   for (i = 1; i < 8; ++i)
 314     {
 315       do_test (i, 2 * i, (8 << i) - 1, 8 << i, 127, 0);
 316       do_test (i, 2 * i, 8 << i, 8 << i, 127, 0);
 317       do_test (i, 2 * i, (8 << i) + 100, 8 << i, 127, 0);
 318
 319       do_test (2 * i, i, (8 << i) - 1, 8 << i, 254, 0);
 320       do_test (2 * i, i, 8 << i, 8 << i, 254, 0);
 321       do_test (2 * i, i, (8 << i) + 100, 8 << i, 254, 0);
 322
 323       do_test (i, 2 * i, 8 << i, 8 << i, 127, 1);
 324       do_test (i, 2 * i, (8 << i) + 100, 8 << i, 127, 1);
 325
 326       do_test (2 * i, i, 8 << i, 8 << i, 254, 1);
 327       do_test (2 * i, i, (8 << i) + 100, 8 << i, 254, 1);
 328
 329       do_test (i, 2 * i, 8 << i, 8 << i, 127, -1);
 330       do_test (i, 2 * i, (8 << i) + 100, 8 << i, 127, -1);
 331
 332       do_test (2 * i, i, 8 << i, 8 << i, 254, -1);
 333       do_test (2 * i, i, (8 << i) + 100, 8 << i, 254, -1);
 334     }
 335
 336   do_random_tests ();
 337 }
 338
 339 int
 340 test_main (void)
 341 {
 342   test_init ();
 343
 344   test_locale ("C");
 345   test_locale ("en_US.ISO-8859-1");
 346   test_locale ("en_US.UTF-8");
 347   test_locale ("tr_TR.ISO-8859-9");
 348   test_locale ("tr_TR.UTF-8");
 349
 350   return ret;
 351 }
 352
 353 #include <support/test-driver.c>