string/test-strcasecmp.c

   1 /* Test and measure strcasecmp functions.
   2    Copyright (C) 1999-2020 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    <https://www.gnu.org/licenses/>.  */
  19
  20 #include <locale.h>
  21 #include <ctype.h>
  22 #define TEST_MAIN
  23 #define TEST_NAME "strcasecmp"
  24 #include "test-string.h"
  25
  26 typedef int (*proto_t) (const char *, const char *);
  27 static int simple_strcasecmp (const char *, const char *);
  28 static int stupid_strcasecmp (const char *, const char *);
  29
  30 IMPL (stupid_strcasecmp, 0)
  31 IMPL (simple_strcasecmp, 0)
  32 IMPL (strcasecmp, 1)
  33
  34 static 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 int
  47 stupid_strcasecmp (const char *s1, const char *s2)
  48 {
  49   size_t ns1 = strlen (s1) + 1, ns2 = strlen (s2) + 1;
  50   size_t n = ns1 < ns2 ? ns1 : ns2;
  51   int ret = 0;
  52
  53   while (n--)
  54     {
  55       if ((ret = ((unsigned char) tolower (*s1)
  56                   - (unsigned char) tolower (*s2))) != 0)
  57         break;
  58       ++s1;
  59       ++s2;
  60     }
  61   return ret;
  62 }
  63
  64 static void
  65 do_one_test (impl_t *impl, const char *s1, const char *s2, int exp_result)
  66 {
  67   int result = CALL (impl, s1, s2);
  68   if ((exp_result == 0 && result != 0)
  69       || (exp_result < 0 && result >= 0)
  70       || (exp_result > 0 && result <= 0))
  71     {
  72       error (0, 0, "Wrong result in function %s %d %d", impl->name,
  73              result, exp_result);
  74       ret = 1;
  75       return;
  76     }
  77 }
  78
  79 static void
  80 do_test (size_t align1, size_t align2, size_t len, int max_char,
  81          int exp_result)
  82 {
  83   size_t i;
  84   char *s1, *s2;
  85
  86   if (len == 0)
  87     return;
  88
  89   align1 &= 7;
  90   if (align1 + len + 1 >= page_size)
  91     return;
  92
  93   align2 &= 7;
  94   if (align2 + len + 1 >= page_size)
  95     return;
  96
  97   s1 = (char *) (buf1 + align1);
  98   s2 = (char *) (buf2 + align2);
  99
 100   for (i = 0; i < len; i++)
 101     {
 102       s1[i] = toupper (1 + 23 * i % max_char);
 103       s2[i] = tolower (s1[i]);
 104     }
 105
 106   s1[len] = s2[len] = 0;
 107   s1[len + 1] = 23;
 108   s2[len + 1] = 24 + exp_result;
 109   if ((s2[len - 1] == 'z' && exp_result == -1)
 110       || (s2[len - 1] == 'a' && exp_result == 1))
 111     s1[len - 1] += exp_result;
 112   else
 113     s2[len - 1] -= exp_result;
 114
 115   FOR_EACH_IMPL (impl, 0)
 116     do_one_test (impl, s1, s2, exp_result);
 117 }
 118
 119 static void
 120 do_random_tests (void)
 121 {
 122   size_t i, j, n, align1, align2, pos, len1, len2;
 123   int result;
 124   long r;
 125   unsigned char *p1 = buf1 + page_size - 512;
 126   unsigned char *p2 = buf2 + page_size - 512;
 127
 128   for (n = 0; n < ITERATIONS; n++)
 129     {
 130       align1 = random () & 31;
 131       if (random () & 1)
 132         align2 = random () & 31;
 133       else
 134         align2 = align1 + (random () & 24);
 135       pos = random () & 511;
 136       j = align1 > align2 ? align1 : align2;
 137       if (pos + j >= 511)
 138         pos = 510 - j - (random () & 7);
 139       len1 = random () & 511;
 140       if (pos >= len1 && (random () & 1))
 141         len1 = pos + (random () & 7);
 142       if (len1 + j >= 512)
 143         len1 = 511 - j - (random () & 7);
 144       if (pos >= len1)
 145         len2 = len1;
 146       else
 147         len2 = len1 + (len1 != 511 - j ? random () % (511 - j - len1) : 0);
 148       j = (pos > len2 ? pos : len2) + align1 + 64;
 149       if (j > 512)
 150         j = 512;
 151       for (i = 0; i < j; ++i)
 152         {
 153           p1[i] = tolower (random () & 255);
 154           if (i < len1 + align1 && !p1[i])
 155             {
 156               p1[i] = tolower (random () & 255);
 157               if (!p1[i])
 158                 p1[i] = tolower (1 + (random () & 127));
 159             }
 160         }
 161       for (i = 0; i < j; ++i)
 162         {
 163           p2[i] = toupper (random () & 255);
 164           if (i < len2 + align2 && !p2[i])
 165             {
 166               p2[i] = toupper (random () & 255);
 167               if (!p2[i])
 168                 toupper (p2[i] = 1 + (random () & 127));
 169             }
 170         }
 171
 172       result = 0;
 173       memcpy (p2 + align2, p1 + align1, pos);
 174       if (pos < len1)
 175         {
 176           if (tolower (p2[align2 + pos]) == p1[align1 + pos])
 177             {
 178               p2[align2 + pos] = toupper (random () & 255);
 179               if (tolower (p2[align2 + pos]) == p1[align1 + pos])
 180                 p2[align2 + pos] = toupper (p1[align1 + pos]
 181                                             + 3 + (random () & 127));
 182             }
 183
 184           if (p1[align1 + pos] < tolower (p2[align2 + pos]))
 185             result = -1;
 186           else
 187             result = 1;
 188         }
 189       p1[len1 + align1] = 0;
 190       p2[len2 + align2] = 0;
 191
 192       FOR_EACH_IMPL (impl, 1)
 193         {
 194           r = CALL (impl, (char *) (p1 + align1), (char *) (p2 + align2));
 195           /* Test whether on 64-bit architectures where ABI requires
 196              callee to promote has the promotion been done.  */
 197           asm ("" : "=g" (r) : "0" (r));
 198           if ((r == 0 && result)
 199               || (r < 0 && result >= 0)
 200               || (r > 0 && result <= 0))
 201             {
 202               error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %zd, %zd, %zd, %zd) %ld != %d, p1 %p p2 %p",
 203                      n, impl->name, align1, align2, len1, len2, pos, r, result, p1, p2);
 204               ret = 1;
 205             }
 206         }
 207     }
 208 }
 209
 210 static void
 211 test_locale (const char *locale)
 212 {
 213   size_t i;
 214
 215   if (setlocale (LC_CTYPE, locale) == NULL)
 216     {
 217       error (0, 0, "cannot set locale \"%s\"", locale);
 218       ret = 1;
 219     }
 220
 221   printf ("%-23s", locale);
 222   FOR_EACH_IMPL (impl, 0)
 223     printf ("\t%s", impl->name);
 224   putchar ('\n');
 225
 226   for (i = 1; i < 16; ++i)
 227     {
 228       do_test (i, i, i, 127, 0);
 229       do_test (i, i, i, 127, 1);
 230       do_test (i, i, i, 127, -1);
 231     }
 232
 233   for (i = 1; i < 10; ++i)
 234     {
 235       do_test (0, 0, 2 << i, 127, 0);
 236       do_test (0, 0, 2 << i, 254, 0);
 237       do_test (0, 0, 2 << i, 127, 1);
 238       do_test (0, 0, 2 << i, 254, 1);
 239       do_test (0, 0, 2 << i, 127, -1);
 240       do_test (0, 0, 2 << i, 254, -1);
 241     }
 242
 243   for (i = 1; i < 8; ++i)
 244     {
 245       do_test (i, 2 * i, 8 << i, 127, 0);
 246       do_test (2 * i, i, 8 << i, 254, 0);
 247       do_test (i, 2 * i, 8 << i, 127, 1);
 248       do_test (2 * i, i, 8 << i, 254, 1);
 249       do_test (i, 2 * i, 8 << i, 127, -1);
 250       do_test (2 * i, i, 8 << i, 254, -1);
 251     }
 252
 253   do_random_tests ();
 254 }
 255
 256 int
 257 test_main (void)
 258 {
 259   test_init ();
 260
 261   test_locale ("C");
 262   test_locale ("en_US.ISO-8859-1");
 263   test_locale ("en_US.UTF-8");
 264   test_locale ("tr_TR.ISO-8859-9");
 265   test_locale ("tr_TR.UTF-8");
 266
 267   return ret;
 268 }
 269
 270 #include <support/test-driver.c>