string/test-strchr.c

   1 /* Test STRCHR functions.
   2    Copyright (C) 1999-2021 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Written by Jakub Jelinek <jakub@redhat.com>, 1999.
   5    Added wcschr support by Liubov Dmitrieva <liubov.dmitrieva@gmail.com>, 2011
   6
   7    The GNU C Library is free software; you can redistribute it and/or
   8    modify it under the terms of the GNU Lesser General Public
   9    License as published by the Free Software Foundation; either
  10    version 2.1 of the License, or (at your option) any later version.
  11
  12    The GNU C Library is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15    Lesser General Public License for more details.
  16
  17    You should have received a copy of the GNU Lesser General Public
  18    License along with the GNU C Library; if not, see
  19    <https://www.gnu.org/licenses/>.  */
  20
  21 #define TEST_MAIN
  22 #ifndef WIDE
  23 # ifdef USE_FOR_STRCHRNUL
  24 #  define TEST_NAME "strchrnul"
  25 # else
  26 #  define TEST_NAME "strchr"
  27 # endif /* !USE_FOR_STRCHRNUL */
  28 #else
  29 # ifdef USE_FOR_STRCHRNUL
  30 #  define TEST_NAME "wcschrnul"
  31 # else
  32 #  define TEST_NAME "wcschr"
  33 # endif /* !USE_FOR_STRCHRNUL */
  34 #endif /* WIDE */
  35 #include "test-string.h"
  36
  37 #ifndef WIDE
  38 # ifdef USE_FOR_STRCHRNUL
  39 #  define STRCHR strchrnul
  40 #  define stupid_STRCHR stupid_STRCHRNUL
  41 #  define simple_STRCHR simple_STRCHRNUL
  42 # else
  43 #  define STRCHR strchr
  44 # endif /* !USE_FOR_STRCHRNUL */
  45 # define STRLEN strlen
  46 # define CHAR char
  47 # define BIG_CHAR CHAR_MAX
  48 # define MIDDLE_CHAR 127
  49 # define SMALL_CHAR 23
  50 # define UCHAR unsigned char
  51 # define L(s) s
  52 #else
  53 # include <wchar.h>
  54 # ifdef USE_FOR_STRCHRNUL
  55 #  define STRCHR wcschrnul
  56 #  define stupid_STRCHR stupid_WCSCHRNUL
  57 #  define simple_STRCHR simple_WCSCHRNUL
  58 # else
  59 #  define STRCHR wcschr
  60 # endif /* !USE_FOR_STRCHRNUL */
  61 # define STRLEN wcslen
  62 # define CHAR wchar_t
  63 # define BIG_CHAR WCHAR_MAX
  64 # define MIDDLE_CHAR 1121
  65 # define SMALL_CHAR 851
  66 # define UCHAR wchar_t
  67 # define L(s) L ## s
  68 #endif /* WIDE */
  69
  70 #ifdef USE_FOR_STRCHRNUL
  71 # define NULLRET(endptr) endptr
  72 #else
  73 # define NULLRET(endptr) NULL
  74 #endif /* !USE_FOR_STRCHRNUL */
  75
  76
  77 typedef CHAR *(*proto_t) (const CHAR *, int);
  78
  79 CHAR *
  80 simple_STRCHR (const CHAR *s, int c)
  81 {
  82   for (; *s != (CHAR) c; ++s)
  83     if (*s == '\0')
  84       return NULLRET ((CHAR *) s);
  85   return (CHAR *) s;
  86 }
  87
  88 CHAR *
  89 stupid_STRCHR (const CHAR *s, int c)
  90 {
  91   size_t n = STRLEN (s) + 1;
  92
  93   while (n--)
  94     if (*s++ == (CHAR) c)
  95       return (CHAR *) s - 1;
  96   return NULLRET ((CHAR *) s - 1);
  97 }
  98
  99 IMPL (stupid_STRCHR, 0)
 100 IMPL (simple_STRCHR, 0)
 101 IMPL (STRCHR, 1)
 102
 103 static int
 104 check_result (impl_t *impl, const CHAR *s, int c, const CHAR *exp_res)
 105 {
 106   CHAR *res = CALL (impl, s, c);
 107   if (res != exp_res)
 108     {
 109       error (0, 0, "Wrong result in function %s %#x %p %p", impl->name,
 110              c, res, exp_res);
 111       ret = 1;
 112       return -1;
 113     }
 114   return 0;
 115 }
 116
 117 static void
 118 do_one_test (impl_t *impl, const CHAR *s, int c, const CHAR *exp_res)
 119 {
 120   if (check_result (impl, s, c, exp_res) < 0)
 121     return;
 122 }
 123
 124 static void
 125 do_test (size_t align, size_t pos, size_t len, int seek_char, int max_char)
 126 /* For wcschr: align here means align not in bytes,
 127    but in wchar_ts, in bytes it will equal to align * (sizeof (wchar_t))
 128    len for wcschr here isn't in bytes but it's number of wchar_t symbols.  */
 129 {
 130   size_t i;
 131   CHAR *result;
 132   CHAR *buf = (CHAR *) buf1;
 133   align &= 127;
 134   if ((align + len) * sizeof (CHAR) >= page_size)
 135     return;
 136
 137   for (i = 0; i < len; ++i)
 138     {
 139       buf[align + i] = 32 + 23 * i % max_char;
 140       if (buf[align + i] == seek_char)
 141         buf[align + i] = seek_char + 1;
 142       else if (buf[align + i] == 0)
 143         buf[align + i] = 1;
 144     }
 145   buf[align + len] = 0;
 146
 147   if (pos < len)
 148     {
 149       buf[align + pos] = seek_char;
 150       result = buf + align + pos;
 151     }
 152   else if (seek_char == 0)
 153     result = buf + align + len;
 154   else
 155     result = NULLRET (buf + align + len);
 156
 157   FOR_EACH_IMPL (impl, 0)
 158     do_one_test (impl, buf + align, seek_char, result);
 159 }
 160
 161 static void
 162 do_random_tests (void)
 163 {
 164   size_t i, j, n, align, pos, len;
 165   int seek_char;
 166   CHAR *result;
 167   UCHAR *p = (UCHAR *) (buf1 + page_size - 512 * sizeof (CHAR));
 168
 169   for (n = 0; n < ITERATIONS; n++)
 170     {
 171       /* For wcschr: align here means align not in bytes, but in wchar_ts,
 172          in bytes it will equal to align * (sizeof (wchar_t)).  */
 173       align = random () & 15;
 174       pos = random () & 511;
 175       seek_char = random () & 255;
 176       if (pos + align >= 511)
 177         pos = 510 - align - (random () & 7);
 178       /* len for wcschr here isn't in bytes but it's number of wchar_t
 179          symbols.  */
 180       len = random () & 511;
 181       if ((pos == len && seek_char)
 182           || (pos > len && (random () & 1)))
 183         len = pos + 1 + (random () & 7);
 184       if (len + align >= 512)
 185         len = 511 - align - (random () & 7);
 186       if (pos == len && seek_char)
 187         len = pos + 1;
 188       j = (pos > len ? pos : len) + align + 64;
 189       if (j > 512)
 190         j = 512;
 191
 192       for (i = 0; i < j; i++)
 193         {
 194           if (i == pos + align)
 195             p[i] = seek_char;
 196           else if (i == len + align)
 197             p[i] = 0;
 198           else
 199             {
 200               p[i] = random () & 255;
 201               if (i < pos + align && p[i] == seek_char)
 202                 p[i] = seek_char + 13;
 203               if (i < len + align && !p[i])
 204                 {
 205                   p[i] = seek_char - 13;
 206                   if (!p[i])
 207                     p[i] = 140;
 208                 }
 209             }
 210         }
 211
 212       if (pos <= len)
 213         result = (CHAR *) (p + pos + align);
 214       else if (seek_char == 0)
 215         result = (CHAR *) (p + len + align);
 216       else
 217         result = NULLRET ((CHAR *) (p + len + align));
 218
 219       FOR_EACH_IMPL (impl, 1)
 220         if (CALL (impl, (CHAR *) (p + align), seek_char) != result)
 221           {
 222             error (0, 0, "Iteration %zd - wrong result in function \
 223                    %s (align in bytes: %zd, seek_char: %d, len: %zd, pos: %zd) %p != %p, p %p",
 224                    n, impl->name, align * sizeof (CHAR), seek_char, len, pos,
 225                    CALL (impl, (CHAR *) (p + align), seek_char), result, p);
 226             ret = 1;
 227           }
 228     }
 229 }
 230
 231 static void
 232 check1 (void)
 233 {
 234   CHAR s[] __attribute__((aligned(16))) = L ("\xff");
 235   CHAR c = L ('\xfe');
 236   CHAR *exp_result = stupid_STRCHR (s, c);
 237
 238   FOR_EACH_IMPL (impl, 0)
 239     check_result (impl, s, c, exp_result);
 240 }
 241
 242 int
 243 test_main (void)
 244 {
 245   size_t i;
 246
 247   test_init ();
 248
 249   check1 ();
 250
 251   printf ("%20s", "");
 252   FOR_EACH_IMPL (impl, 0)
 253     printf ("\t%s", impl->name);
 254   putchar ('\n');
 255
 256   for (i = 1; i < 8; ++i)
 257     {
 258       do_test (0, 16 << i, 2048, SMALL_CHAR, MIDDLE_CHAR);
 259       do_test (i, 16 << i, 2048, SMALL_CHAR, MIDDLE_CHAR);
 260     }
 261
 262   for (i = 1; i < 8; ++i)
 263     {
 264       do_test (0, 16 << i, 4096, SMALL_CHAR, MIDDLE_CHAR);
 265       do_test (i, 16 << i, 4096, SMALL_CHAR, MIDDLE_CHAR);
 266     }
 267
 268   for (i = 1; i < 8; ++i)
 269     {
 270       do_test (i, 64, 256, SMALL_CHAR, MIDDLE_CHAR);
 271       do_test (i, 64, 256, SMALL_CHAR, BIG_CHAR);
 272     }
 273
 274   for (i = 0; i < 8; ++i)
 275     {
 276       do_test (16 * i, 256, 512, SMALL_CHAR, MIDDLE_CHAR);
 277       do_test (16 * i, 256, 512, SMALL_CHAR, BIG_CHAR);
 278     }
 279
 280   for (i = 0; i < 32; ++i)
 281     {
 282       do_test (0, i, i + 1, SMALL_CHAR, MIDDLE_CHAR);
 283       do_test (0, i, i + 1, SMALL_CHAR, BIG_CHAR);
 284     }
 285
 286   for (i = 1; i < 8; ++i)
 287     {
 288       do_test (0, 16 << i, 2048, 0, MIDDLE_CHAR);
 289       do_test (i, 16 << i, 2048, 0, MIDDLE_CHAR);
 290     }
 291
 292   for (i = 1; i < 8; ++i)
 293     {
 294       do_test (0, 16 << i, 4096, 0, MIDDLE_CHAR);
 295       do_test (i, 16 << i, 4096, 0, MIDDLE_CHAR);
 296     }
 297
 298   for (i = 1; i < 8; ++i)
 299     {
 300       do_test (i, 64, 256, 0, MIDDLE_CHAR);
 301       do_test (i, 64, 256, 0, BIG_CHAR);
 302     }
 303
 304   for (i = 0; i < 8; ++i)
 305     {
 306       do_test (16 * i, 256, 512, 0, MIDDLE_CHAR);
 307       do_test (16 * i, 256, 512, 0, BIG_CHAR);
 308     }
 309
 310   for (i = 0; i < 32; ++i)
 311     {
 312       do_test (0, i, i + 1, 0, MIDDLE_CHAR);
 313       do_test (0, i, i + 1, 0, BIG_CHAR);
 314     }
 315
 316   do_random_tests ();
 317   return ret;
 318 }
 319
 320 #include <support/test-driver.c>