string/test-strchr.c

   1 /* Test STRCHR 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 #define TEST_MAIN
  20 #ifndef WIDE
  21 # ifdef USE_FOR_STRCHRNUL
  22 #  define TEST_NAME "strchrnul"
  23 # else
  24 #  define TEST_NAME "strchr"
  25 # endif /* !USE_FOR_STRCHRNUL */
  26 #else
  27 # ifdef USE_FOR_STRCHRNUL
  28 #  define TEST_NAME "wcschrnul"
  29 # else
  30 #  define TEST_NAME "wcschr"
  31 # endif /* !USE_FOR_STRCHRNUL */
  32 #endif /* WIDE */
  33 #include "test-string.h"
  34
  35 #ifndef WIDE
  36 # ifdef USE_FOR_STRCHRNUL
  37 #  define STRCHR strchrnul
  38 #  define simple_STRCHR simple_STRCHRNUL
  39 # else
  40 #  define STRCHR strchr
  41 # endif /* !USE_FOR_STRCHRNUL */
  42 # define STRLEN strlen
  43 # define CHAR char
  44 # define BIG_CHAR CHAR_MAX
  45 # define MIDDLE_CHAR 127
  46 # define SMALL_CHAR 23
  47 # define UCHAR unsigned char
  48 # define L(s) s
  49 #else
  50 # include <wchar.h>
  51 # ifdef USE_FOR_STRCHRNUL
  52 #  define STRCHR wcschrnul
  53 #  define simple_STRCHR simple_WCSCHRNUL
  54 # else
  55 #  define STRCHR wcschr
  56 # endif /* !USE_FOR_STRCHRNUL */
  57 # define STRLEN wcslen
  58 # define CHAR wchar_t
  59 # define BIG_CHAR WCHAR_MAX
  60 # define MIDDLE_CHAR 1121
  61 # define SMALL_CHAR 851
  62 # define UCHAR wchar_t
  63 # define L(s) L ## s
  64 #endif /* WIDE */
  65
  66 #ifdef USE_FOR_STRCHRNUL
  67 # define NULLRET(endptr) endptr
  68 #else
  69 # define NULLRET(endptr) NULL
  70 #endif /* !USE_FOR_STRCHRNUL */
  71
  72
  73 typedef CHAR *(*proto_t) (const CHAR *, int);
  74
  75 /* Naive implementation to verify results.  */
  76 CHAR *
  77 simple_STRCHR (const CHAR *s, int c)
  78 {
  79   size_t n = STRLEN (s) + 1;
  80
  81   while (n--)
  82     if (*s++ == (CHAR) c)
  83       return (CHAR *) s - 1;
  84   return NULLRET ((CHAR *) s - 1);
  85 }
  86
  87 IMPL (STRCHR, 1)
  88
  89 static int
  90 check_result (impl_t *impl, const CHAR *s, int c, const CHAR *exp_res)
  91 {
  92   CHAR *res = CALL (impl, s, c);
  93   if (res != exp_res)
  94     {
  95       error (0, 0, "Wrong result in function %s %#x %p %p", impl->name,
  96              c, res, exp_res);
  97       ret = 1;
  98       return -1;
  99     }
 100   return 0;
 101 }
 102
 103 static void
 104 do_one_test (impl_t *impl, const CHAR *s, int c, const CHAR *exp_res)
 105 {
 106   if (check_result (impl, s, c, exp_res) < 0)
 107     return;
 108 }
 109
 110 static void
 111 do_test (size_t align, size_t pos, size_t len, int seek_char, int max_char)
 112 /* For wcschr: align here means align not in bytes,
 113    but in wchar_ts, in bytes it will equal to align * (sizeof (wchar_t))
 114    len for wcschr here isn't in bytes but it's number of wchar_t symbols.  */
 115 {
 116   size_t i;
 117   CHAR *result;
 118   CHAR *buf = (CHAR *) buf1;
 119   align &= 127;
 120   if ((align + len) * sizeof (CHAR) >= page_size)
 121     return;
 122
 123   for (i = 0; i < len; ++i)
 124     {
 125       buf[align + i] = 32 + 23 * i % max_char;
 126       if (buf[align + i] == seek_char)
 127         buf[align + i] = seek_char + 1;
 128       else if (buf[align + i] == 0)
 129         buf[align + i] = 1;
 130     }
 131   buf[align + len] = 0;
 132
 133   if (pos < len)
 134     {
 135       buf[align + pos] = seek_char;
 136       result = buf + align + pos;
 137     }
 138   else if (seek_char == 0)
 139     result = buf + align + len;
 140   else
 141     result = NULLRET (buf + align + len);
 142
 143   FOR_EACH_IMPL (impl, 0)
 144     do_one_test (impl, buf + align, seek_char, result);
 145 }
 146
 147 static void
 148 do_random_tests (void)
 149 {
 150   size_t i, j, n, align, pos, len;
 151   int seek_char;
 152   CHAR *result;
 153   UCHAR *p = (UCHAR *) (buf1 + page_size - 512 * sizeof (CHAR));
 154
 155   for (n = 0; n < ITERATIONS; n++)
 156     {
 157       /* For wcschr: align here means align not in bytes, but in wchar_ts,
 158          in bytes it will equal to align * (sizeof (wchar_t)).  */
 159       align = random () & 15;
 160       pos = random () & 511;
 161       seek_char = random () & 255;
 162       if (pos + align >= 511)
 163         pos = 510 - align - (random () & 7);
 164       /* len for wcschr here isn't in bytes but it's number of wchar_t
 165          symbols.  */
 166       len = random () & 511;
 167       if ((pos == len && seek_char)
 168           || (pos > len && (random () & 1)))
 169         len = pos + 1 + (random () & 7);
 170       if (len + align >= 512)
 171         len = 511 - align - (random () & 7);
 172       if (pos == len && seek_char)
 173         len = pos + 1;
 174       j = (pos > len ? pos : len) + align + 64;
 175       if (j > 512)
 176         j = 512;
 177
 178       for (i = 0; i < j; i++)
 179         {
 180           if (i == pos + align)
 181             p[i] = seek_char;
 182           else if (i == len + align)
 183             p[i] = 0;
 184           else
 185             {
 186               p[i] = random () & 255;
 187               if (i < pos + align && p[i] == seek_char)
 188                 p[i] = seek_char + 13;
 189               if (i < len + align && !p[i])
 190                 {
 191                   p[i] = seek_char - 13;
 192                   if (!p[i])
 193                     p[i] = 140;
 194                 }
 195             }
 196         }
 197
 198       if (pos <= len)
 199         result = (CHAR *) (p + pos + align);
 200       else if (seek_char == 0)
 201         result = (CHAR *) (p + len + align);
 202       else
 203         result = NULLRET ((CHAR *) (p + len + align));
 204
 205       FOR_EACH_IMPL (impl, 1)
 206         if (CALL (impl, (CHAR *) (p + align), seek_char) != result)
 207           {
 208             error (0, 0, "Iteration %zd - wrong result in function \
 209                    %s (align in bytes: %zd, seek_char: %d, len: %zd, pos: %zd) %p != %p, p %p",
 210                    n, impl->name, align * sizeof (CHAR), seek_char, len, pos,
 211                    CALL (impl, (CHAR *) (p + align), seek_char), result, p);
 212             ret = 1;
 213           }
 214     }
 215 }
 216
 217 static void
 218 check1 (void)
 219 {
 220   CHAR s[] __attribute__((aligned(16))) = L ("\xff");
 221   CHAR c = L ('\xfe');
 222   CHAR *exp_result = simple_STRCHR (s, c);
 223
 224   FOR_EACH_IMPL (impl, 0)
 225     check_result (impl, s, c, exp_result);
 226 }
 227
 228 int
 229 test_main (void)
 230 {
 231   size_t i;
 232
 233   test_init ();
 234
 235   check1 ();
 236
 237   printf ("%20s", "");
 238   FOR_EACH_IMPL (impl, 0)
 239     printf ("\t%s", impl->name);
 240   putchar ('\n');
 241
 242   for (i = 1; i < 8; ++i)
 243     {
 244       do_test (0, 16 << i, 2048, SMALL_CHAR, MIDDLE_CHAR);
 245       do_test (i, 16 << i, 2048, SMALL_CHAR, MIDDLE_CHAR);
 246     }
 247
 248   for (i = 1; i < 8; ++i)
 249     {
 250       do_test (0, 16 << i, 4096, SMALL_CHAR, MIDDLE_CHAR);
 251       do_test (i, 16 << i, 4096, SMALL_CHAR, MIDDLE_CHAR);
 252     }
 253
 254   for (i = 1; i < 8; ++i)
 255     {
 256       do_test (i, 64, 256, SMALL_CHAR, MIDDLE_CHAR);
 257       do_test (i, 64, 256, SMALL_CHAR, BIG_CHAR);
 258     }
 259
 260   for (i = 0; i < 8; ++i)
 261     {
 262       do_test (16 * i, 256, 512, SMALL_CHAR, MIDDLE_CHAR);
 263       do_test (16 * i, 256, 512, SMALL_CHAR, BIG_CHAR);
 264     }
 265
 266   for (i = 0; i < 32; ++i)
 267     {
 268       do_test (0, i, i + 1, SMALL_CHAR, MIDDLE_CHAR);
 269       do_test (0, i, i + 1, SMALL_CHAR, BIG_CHAR);
 270     }
 271
 272   for (i = 1; i < 8; ++i)
 273     {
 274       do_test (0, 16 << i, 2048, 0, MIDDLE_CHAR);
 275       do_test (i, 16 << i, 2048, 0, MIDDLE_CHAR);
 276     }
 277
 278   for (i = 1; i < 8; ++i)
 279     {
 280       do_test (0, 16 << i, 4096, 0, MIDDLE_CHAR);
 281       do_test (i, 16 << i, 4096, 0, MIDDLE_CHAR);
 282     }
 283
 284   for (i = 1; i < 8; ++i)
 285     {
 286       do_test (i, 64, 256, 0, MIDDLE_CHAR);
 287       do_test (i, 64, 256, 0, BIG_CHAR);
 288     }
 289
 290   for (i = 0; i < 8; ++i)
 291     {
 292       do_test (16 * i, 256, 512, 0, MIDDLE_CHAR);
 293       do_test (16 * i, 256, 512, 0, BIG_CHAR);
 294     }
 295
 296   for (i = 0; i < 32; ++i)
 297     {
 298       do_test (0, i, i + 1, 0, MIDDLE_CHAR);
 299       do_test (0, i, i + 1, 0, BIG_CHAR);
 300     }
 301
 302   do_random_tests ();
 303   return ret;
 304 }
 305
 306 #include <support/test-driver.c>