string/test-strcasecmp.c

   1 /* Test and measure strcasecmp functions.
   2    Copyright (C) 1999-2023 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   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 #include <locale.h>
  20 #include <ctype.h>
  21 #include <assert.h>
  22 #define TEST_LEN (getpagesize () * 3)
  23 #define MIN_PAGE_SIZE (TEST_LEN + 2 * getpagesize ())
  24
  25 #define TEST_MAIN
  26 #define TEST_NAME "strcasecmp"
  27 #include "test-string.h"
  28
  29 typedef int (*proto_t) (const char *, const char *);
  30
  31 IMPL (strcasecmp, 1)
  32
  33 /* Naive implementation to verify results.  */
  34 int
  35 simple_strcasecmp (const char *s1, const char *s2)
  36 {
  37   int ret;
  38
  39   while ((ret = ((unsigned char) tolower (*s1)
  40                  - (unsigned char) tolower (*s2))) == 0
  41          && *s1++)
  42     ++s2;
  43   return ret;
  44 }
  45
  46 static void
  47 do_one_test (impl_t *impl, const char *s1, const char *s2, int exp_result)
  48 {
  49   int result = CALL (impl, s1, s2);
  50   if ((exp_result == 0 && result != 0)
  51       || (exp_result < 0 && result >= 0)
  52       || (exp_result > 0 && result <= 0))
  53     {
  54       error (0, 0, "Wrong result in function %s %d %d", impl->name,
  55              result, exp_result);
  56       ret = 1;
  57       return;
  58     }
  59 }
  60
  61 static void
  62 do_test (size_t align1, size_t align2, size_t len, int max_char,
  63          int exp_result)
  64 {
  65   size_t i;
  66   char *s1, *s2;
  67
  68   if (len == 0)
  69     return;
  70
  71
  72   align1 &= getpagesize () - 1;
  73   if (align1 + (len + 1) >= page_size)
  74     return;
  75
  76   align2 &= getpagesize () - 1;
  77   if (align2 + (len + 1) >= page_size)
  78     return;
  79
  80   s1 = (char *) (buf1 + align1);
  81   s2 = (char *) (buf2 + align2);
  82
  83   for (i = 0; i < len; i++)
  84     {
  85       s1[i] = toupper (1 + 23 * i % max_char);
  86       s2[i] = tolower (s1[i]);
  87     }
  88
  89   s1[len] = s2[len] = 0;
  90   s1[len + 1] = 23;
  91   s2[len + 1] = 24 + exp_result;
  92
  93   if ((s2[len - 1] == 'z' && exp_result == -1)
  94       || (s2[len - 1] == 'a' && exp_result == 1))
  95     s1[len - 1] += exp_result;
  96   else if ((s1[len - 1] == 'Z' + 1 && exp_result == 1)
  97            || (s1[len - 1] == 'A' - 1 && exp_result == -1))
  98     s1[len - 1] = tolower (s2[len - 1]) + exp_result;
  99   else
 100     s2[len - 1] -= exp_result;
 101
 102   /* For some locals this is not guranteed yet.  */
 103   if (tolower (s1[len - 1]) - tolower (s2[len - 1]) != exp_result)
 104     {
 105       if (exp_result == -1)
 106         {
 107           s1[len - 1] = tolower ('a');
 108           s2[len - 1] = toupper (tolower ('a') - 1);
 109         }
 110       else if (exp_result == 0)
 111         s1[len - 1] = toupper (s2[len - 1]);
 112       else
 113         {
 114           s1[len - 1] = tolower ('a');
 115           s2[len - 1] = toupper (tolower ('a') + 1);
 116         }
 117     }
 118
 119   FOR_EACH_IMPL (impl, 0)
 120     do_one_test (impl, s1, s2, exp_result);
 121 }
 122
 123 static void
 124 do_random_tests (void)
 125 {
 126   size_t i, j, n, align1, align2, pos, len1, len2;
 127   int result;
 128   long r;
 129   unsigned char *p1 = buf1 + page_size - 512;
 130   unsigned char *p2 = buf2 + page_size - 512;
 131
 132   for (n = 0; n < ITERATIONS; n++)
 133     {
 134       align1 = random () & 31;
 135       if (random () & 1)
 136         align2 = random () & 31;
 137       else
 138         align2 = align1 + (random () & 24);
 139       pos = random () & 511;
 140       j = align1 > align2 ? align1 : align2;
 141       if (pos + j >= 511)
 142         pos = 510 - j - (random () & 7);
 143       len1 = random () & 511;
 144       if (pos >= len1 && (random () & 1))
 145         len1 = pos + (random () & 7);
 146       if (len1 + j >= 512)
 147         len1 = 511 - j - (random () & 7);
 148       if (pos >= len1)
 149         len2 = len1;
 150       else
 151         len2 = len1 + (len1 != 511 - j ? random () % (511 - j - len1) : 0);
 152       j = (pos > len2 ? pos : len2) + align1 + 64;
 153       if (j > 512)
 154         j = 512;
 155       for (i = 0; i < j; ++i)
 156         {
 157           p1[i] = tolower (random () & 255);
 158           if (i < len1 + align1 && !p1[i])
 159             {
 160               p1[i] = tolower (random () & 255);
 161               if (!p1[i])
 162                 p1[i] = tolower (1 + (random () & 127));
 163             }
 164         }
 165       for (i = 0; i < j; ++i)
 166         {
 167           p2[i] = toupper (random () & 255);
 168           if (i < len2 + align2 && !p2[i])
 169             {
 170               p2[i] = toupper (random () & 255);
 171               if (!p2[i])
 172                 toupper (p2[i] = 1 + (random () & 127));
 173             }
 174         }
 175
 176       result = 0;
 177       memcpy (p2 + align2, p1 + align1, pos);
 178       if (pos < len1)
 179         {
 180           if (tolower (p2[align2 + pos]) == p1[align1 + pos])
 181             {
 182               p2[align2 + pos] = toupper (random () & 255);
 183               if (tolower (p2[align2 + pos]) == p1[align1 + pos])
 184                 p2[align2 + pos] = toupper (p1[align1 + pos]
 185                                             + 3 + (random () & 127));
 186             }
 187
 188           if (p1[align1 + pos] < tolower (p2[align2 + pos]))
 189             result = -1;
 190           else
 191             result = 1;
 192         }
 193       p1[len1 + align1] = 0;
 194       p2[len2 + align2] = 0;
 195
 196       FOR_EACH_IMPL (impl, 1)
 197         {
 198           r = CALL (impl, (char *) (p1 + align1), (char *) (p2 + align2));
 199           /* Test whether on 64-bit architectures where ABI requires
 200              callee to promote has the promotion been done.  */
 201           asm ("" : "=g" (r) : "0" (r));
 202           if ((r == 0 && result)
 203               || (r < 0 && result >= 0)
 204               || (r > 0 && result <= 0))
 205             {
 206               error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %zd, %zd, %zd, %zd) %ld != %d, p1 %p p2 %p",
 207                      n, impl->name, align1, align2, len1, len2, pos, r, result, p1, p2);
 208               ret = 1;
 209             }
 210         }
 211     }
 212 }
 213
 214 static void
 215 test_locale (const char *locale, int extra_tests)
 216 {
 217   size_t i, j, k;
 218   const size_t test_len = MIN(TEST_LEN, 3 * 4096);
 219   if (setlocale (LC_CTYPE, locale) == NULL)
 220     {
 221       error (0, 0, "cannot set locale \"%s\"", locale);
 222       ret = 1;
 223     }
 224
 225   printf ("%-23s", locale);
 226   FOR_EACH_IMPL (impl, 0)
 227     printf ("\t%s", impl->name);
 228   putchar ('\n');
 229
 230   for (i = 1; i < 16; ++i)
 231     {
 232       do_test (i, i, i, 127, 0);
 233       do_test (i, i, i, 127, 1);
 234       do_test (i, i, i, 127, -1);
 235     }
 236
 237   for (i = 1; i < 10; ++i)
 238     {
 239       do_test (0, 0, 2 << i, 127, 0);
 240       do_test (0, 0, 2 << i, 254, 0);
 241       do_test (0, 0, 2 << i, 127, 1);
 242       do_test (0, 0, 2 << i, 254, 1);
 243       do_test (0, 0, 2 << i, 127, -1);
 244       do_test (0, 0, 2 << i, 254, -1);
 245     }
 246
 247   for (i = 1; i < 8; ++i)
 248     {
 249       do_test (i, 2 * i, 8 << i, 127, 0);
 250       do_test (2 * i, i, 8 << i, 254, 0);
 251       do_test (i, 2 * i, 8 << i, 127, 1);
 252       do_test (2 * i, i, 8 << i, 254, 1);
 253       do_test (i, 2 * i, 8 << i, 127, -1);
 254       do_test (2 * i, i, 8 << i, 254, -1);
 255     }
 256
 257   for (j = 0; extra_tests && j < 160; ++j)
 258     {
 259       for (i = 0; i < test_len;)
 260         {
 261           do_test (getpagesize () - j - 1, 0, i, 127, 0);
 262           do_test (getpagesize () - j - 1, 0, i, 127, 1);
 263           do_test (getpagesize () - j - 1, 0, i, 127, -1);
 264
 265           do_test (getpagesize () - j - 1, j, i, 127, 0);
 266           do_test (getpagesize () - j - 1, j, i, 127, 1);
 267           do_test (getpagesize () - j - 1, j, i, 127, -1);
 268
 269           do_test (0, getpagesize () - j - 1, i, 127, 0);
 270           do_test (0, getpagesize () - j - 1, i, 127, 1);
 271           do_test (0, getpagesize () - j - 1, i, 127, -1);
 272
 273           do_test (j, getpagesize () - j - 1, i, 127, 0);
 274           do_test (j, getpagesize () - j - 1, i, 127, 1);
 275           do_test (j, getpagesize () - j - 1, i, 127, -1);
 276
 277           for (k = 2; k <= 128; k += k)
 278             {
 279               do_test (getpagesize () - k, getpagesize () - j - 1, i, 127, 0);
 280               do_test (getpagesize () - k - 1, getpagesize () - j - 1, i, 127,
 281                        0);
 282               do_test (getpagesize () - k, getpagesize () - j - 1, i, 127, 1);
 283               do_test (getpagesize () - k - 1, getpagesize () - j - 1, i, 127,
 284                        1);
 285               do_test (getpagesize () - k, getpagesize () - j - 1, i, 127, -1);
 286               do_test (getpagesize () - k - 1, getpagesize () - j - 1, i, 127,
 287                        -1);
 288             }
 289
 290           if (i < 32)
 291             {
 292               i += 1;
 293             }
 294           else if (i < 161)
 295             {
 296               i += 7;
 297             }
 298           else if (i + 161 < test_len)
 299             {
 300               i += 31;
 301               i *= 17;
 302               i /= 16;
 303               if (i + 161 > test_len)
 304                 {
 305                   i = test_len - 160;
 306                 }
 307             }
 308           else if (i + 32 < test_len)
 309             {
 310               i += 7;
 311             }
 312           else
 313             {
 314               i += 1;
 315             }
 316         }
 317     }
 318
 319   do_random_tests ();
 320 }
 321
 322 int
 323 test_main (void)
 324 {
 325   test_init ();
 326
 327   test_locale ("C", 1);
 328   test_locale ("en_US.ISO-8859-1", 0);
 329   test_locale ("en_US.UTF-8", 0);
 330   test_locale ("tr_TR.ISO-8859-9", 0);
 331   test_locale ("tr_TR.UTF-8", 0);
 332
 333   return ret;
 334 }
 335
 336 #include <support/test-driver.c>