string/test-strrchr.c

   1 /* Test and measure 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 #ifdef WIDE
  21 # define TEST_NAME "wcsrchr"
  22 #else
  23 # define TEST_NAME "strrchr"
  24 #endif
  25 #include "test-string.h"
  26
  27 #ifdef WIDE
  28 # include <wchar.h>
  29 # define STRRCHR wcsrchr
  30 # define CHAR wchar_t
  31 # define UCHAR wchar_t
  32 # define BIG_CHAR WCHAR_MAX
  33 # define SMALL_CHAR 1273
  34 #else
  35 # define STRRCHR strrchr
  36 # define CHAR char
  37 # define UCHAR unsigned char
  38 # define BIG_CHAR CHAR_MAX
  39 # define SMALL_CHAR 127
  40 #endif
  41
  42 typedef CHAR *(*proto_t) (const CHAR *, int);
  43
  44 IMPL (STRRCHR, 1)
  45
  46 /* Also check the generic implementation.  */
  47 #undef STRRCHR
  48 #undef weak_alias
  49 #define weak_alias(a, b)
  50 #undef libc_hidden_builtin_def
  51 #define libc_hidden_builtin_def(a)
  52 #undef libc_hidden_def
  53 #define libc_hidden_def(a)
  54 #undef libc_hidden_weak
  55 #define libc_hidden_weak(a)
  56 #ifndef WIDE
  57 # define STRLEN __strlen_default
  58 # include "string/strlen.c"
  59 # define MEMRCHR __memrchr_default
  60 # include "string/memrchr.c"
  61 # define STRRCHR __strrchr_default
  62 # include "string/strrchr.c"
  63 # define STRRCHR_DEFAULT __strrchr_default
  64 #else
  65 # define WCSRCHR __wcsrchr_default
  66 # include "wcsmbs/wcsrchr.c"
  67 # define STRRCHR_DEFAULT __wcsrchr_default
  68 #endif
  69 IMPL (STRRCHR_DEFAULT, 1)
  70
  71 static void
  72 do_one_test (impl_t *impl, const CHAR *s, int c, CHAR *exp_res)
  73 {
  74   CHAR *res = CALL (impl, s, c);
  75   if (res != exp_res)
  76     {
  77       error (0, 0, "Wrong result in function %s %p %p", impl->name,
  78              res, exp_res);
  79       ret = 1;
  80       return;
  81     }
  82 }
  83
  84 static void
  85 do_test (size_t align, size_t pos, size_t len, int seek_char, int max_char)
  86 /* For wcsrchr: align here means align not in bytes,
  87    but in wchar_ts, in bytes it will equal to align * (sizeof (wchar_t))
  88    len for wcschr here isn't in bytes but it's number of wchar_t symbols.  */
  89 {
  90   size_t i;
  91   CHAR *result;
  92   CHAR *buf = (CHAR *) buf1;
  93
  94   align &= 7;
  95   if ( (align + len) * sizeof (CHAR) >= page_size)
  96     return;
  97
  98   for (i = 0; i < len; ++i)
  99     {
 100       buf[align + i] = (random () * random ()) & max_char;
 101       if (!buf[align + i])
 102         buf[align + i] = (random () * random ()) & max_char;
 103       if (!buf[align + i])
 104         buf[align + i] = 1;
 105       if ((i > pos || pos >= len) && buf[align + i] == seek_char)
 106         buf[align + i] = seek_char + 10 + (random () & 15);
 107     }
 108   buf[align + len] = 0;
 109
 110   if (pos < len)
 111     {
 112       buf[align + pos] = seek_char;
 113       result = (CHAR *) (buf + align + pos);
 114     }
 115   else if (seek_char == 0)
 116     result = (CHAR *) (buf + align + len);
 117   else
 118     result = NULL;
 119
 120   FOR_EACH_IMPL (impl, 0)
 121     do_one_test (impl, (CHAR *) (buf + align), seek_char, result);
 122 }
 123
 124 static void
 125 do_random_tests (void)
 126 {
 127   size_t i, j, n, align, pos, len;
 128   int seek_char;
 129   CHAR *result;
 130   UCHAR *p = (UCHAR *) (buf1 + page_size) - 512;
 131
 132   for (n = 0; n < ITERATIONS; n++)
 133     {
 134       align = random () & (63 / sizeof (CHAR));
 135       /* For wcsrchr: align here means align not in bytes, but in wchar_ts,
 136          in bytes it will equal to align * (sizeof (wchar_t)).
 137          For strrchr we need to check all alignments from 0 to 63 since
 138          some assembly implementations have separate prolog for alignments
 139          more 48. */
 140       pos = random () & 511;
 141       if (pos + align >= 511)
 142         pos = 510 - align - (random () & 7);
 143       len = random () & 511;
 144       /* len for wcschr here isn't in bytes but it's number of wchar_t
 145          symbols.  */
 146       if (pos >= len)
 147         len = pos + (random () & 7);
 148       if (len + align >= 512)
 149         len = 511 - align - (random () & 7);
 150       seek_char = random () & 255;
 151       if (seek_char && pos == len)
 152         {
 153           if (pos)
 154             --pos;
 155           else
 156             ++len;
 157         }
 158       j = len + align + 64;
 159       if (j > 512)
 160         j = 512;
 161
 162       for (i = 0; i < j; i++)
 163         {
 164           if (i == pos + align)
 165             p[i] = seek_char;
 166           else if (i == len + align)
 167             p[i] = 0;
 168           else
 169             {
 170               p[i] = random () & 255;
 171               if (((i > pos + align && i < len + align) || pos > len)
 172                   && p[i] == seek_char)
 173                 p[i] = seek_char + 13;
 174               if (i < len + align && !p[i])
 175                 {
 176                   p[i] = seek_char - 13;
 177                   if (!p[i])
 178                     p[i] = 140;
 179                 }
 180             }
 181         }
 182
 183       if (pos <= len)
 184         result = (CHAR *) (p + pos + align);
 185       else if (seek_char == 0)
 186         result = (CHAR *) (p + len + align);
 187       else
 188         result = NULL;
 189
 190       FOR_EACH_IMPL (impl, 1)
 191         if (CALL (impl, (CHAR *) (p + align), seek_char) != result)
 192           {
 193             error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %d, %zd, %zd) %p != %p, p %p",
 194                    n, impl->name, align, seek_char, len, pos,
 195                    CALL (impl, (CHAR *) (p + align), seek_char), result, p);
 196             ret = 1;
 197           }
 198     }
 199 }
 200
 201 int
 202 test_main (void)
 203 {
 204   size_t i;
 205
 206   test_init ();
 207
 208   printf ("%20s", "");
 209   FOR_EACH_IMPL (impl, 0)
 210     printf ("\t%s", impl->name);
 211   putchar ('\n');
 212
 213   for (i = 1; i < 8; ++i)
 214     {
 215       do_test (0, 16 << i, 2048, 23, SMALL_CHAR);
 216       do_test (i, 16 << i, 2048, 23, SMALL_CHAR);
 217     }
 218
 219   for (i = 1; i < 8; ++i)
 220     {
 221       do_test (i, 64, 256, 23, SMALL_CHAR);
 222       do_test (i, 64, 256, 23, BIG_CHAR);
 223     }
 224
 225   for (i = 0; i < 32; ++i)
 226     {
 227       do_test (0, i, i + 1, 23, SMALL_CHAR);
 228       do_test (0, i, i + 1, 23, BIG_CHAR);
 229     }
 230
 231   for (i = 1; i < 8; ++i)
 232     {
 233       do_test (0, 16 << i, 2048, 0, SMALL_CHAR);
 234       do_test (i, 16 << i, 2048, 0, SMALL_CHAR);
 235     }
 236
 237   for (i = 1; i < 8; ++i)
 238     {
 239       do_test (i, 64, 256, 0, SMALL_CHAR);
 240       do_test (i, 64, 256, 0, BIG_CHAR);
 241     }
 242
 243   for (i = 0; i < 32; ++i)
 244     {
 245       do_test (0, i, i + 1, 0, SMALL_CHAR);
 246       do_test (0, i, i + 1, 0, BIG_CHAR);
 247     }
 248
 249   do_random_tests ();
 250   return ret;
 251 }
 252
 253 #include <support/test-driver.c>