string/test-strrchr.c

   1 /* Test and measure STRCHR functions.
   2    Copyright (C) 1999-2022 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 SIMPLE_STRRCHR simple_wcsrchr
  30 # define STRRCHR wcsrchr
  31 # define CHAR wchar_t
  32 # define UCHAR wchar_t
  33 # define BIG_CHAR WCHAR_MAX
  34 # define SMALL_CHAR 1273
  35 #else
  36 # define SIMPLE_STRRCHR simple_strrchr
  37 # define STRRCHR strrchr
  38 # define CHAR char
  39 # define UCHAR unsigned char
  40 # define BIG_CHAR CHAR_MAX
  41 # define SMALL_CHAR 127
  42 #endif
  43
  44 typedef CHAR *(*proto_t) (const CHAR *, int);
  45 CHAR *SIMPLE_STRRCHR (const CHAR *, int);
  46
  47 IMPL (SIMPLE_STRRCHR, 0)
  48 IMPL (STRRCHR, 1)
  49
  50 CHAR *
  51 SIMPLE_STRRCHR (const CHAR *s, int c)
  52 {
  53   const CHAR *ret = NULL;
  54
  55   for (; *s != '\0'; ++s)
  56     if (*s == (CHAR) c)
  57       ret = s;
  58
  59   return (CHAR *) (c == '\0' ? s : ret);
  60 }
  61
  62 static void
  63 do_one_test (impl_t *impl, const CHAR *s, int c, CHAR *exp_res)
  64 {
  65   CHAR *res = CALL (impl, s, c);
  66   if (res != exp_res)
  67     {
  68       error (0, 0, "Wrong result in function %s %p %p", impl->name,
  69              res, exp_res);
  70       ret = 1;
  71       return;
  72     }
  73 }
  74
  75 static void
  76 do_test (size_t align, size_t pos, size_t len, int seek_char, int max_char)
  77 /* For wcsrchr: align here means align not in bytes,
  78    but in wchar_ts, in bytes it will equal to align * (sizeof (wchar_t))
  79    len for wcschr here isn't in bytes but it's number of wchar_t symbols.  */
  80 {
  81   size_t i;
  82   CHAR *result;
  83   CHAR *buf = (CHAR *) buf1;
  84
  85   align &= 7;
  86   if ( (align + len) * sizeof (CHAR) >= page_size)
  87     return;
  88
  89   for (i = 0; i < len; ++i)
  90     {
  91       buf[align + i] = (random () * random ()) & max_char;
  92       if (!buf[align + i])
  93         buf[align + i] = (random () * random ()) & max_char;
  94       if (!buf[align + i])
  95         buf[align + i] = 1;
  96       if ((i > pos || pos >= len) && buf[align + i] == seek_char)
  97         buf[align + i] = seek_char + 10 + (random () & 15);
  98     }
  99   buf[align + len] = 0;
 100
 101   if (pos < len)
 102     {
 103       buf[align + pos] = seek_char;
 104       result = (CHAR *) (buf + align + pos);
 105     }
 106   else if (seek_char == 0)
 107     result = (CHAR *) (buf + align + len);
 108   else
 109     result = NULL;
 110
 111   FOR_EACH_IMPL (impl, 0)
 112     do_one_test (impl, (CHAR *) (buf + align), seek_char, result);
 113 }
 114
 115 static void
 116 do_random_tests (void)
 117 {
 118   size_t i, j, n, align, pos, len;
 119   int seek_char;
 120   CHAR *result;
 121   UCHAR *p = (UCHAR *) (buf1 + page_size) - 512;
 122
 123   for (n = 0; n < ITERATIONS; n++)
 124     {
 125       align = random () & (63 / sizeof (CHAR));
 126       /* For wcsrchr: align here means align not in bytes, but in wchar_ts,
 127          in bytes it will equal to align * (sizeof (wchar_t)).
 128          For strrchr we need to check all alignments from 0 to 63 since
 129          some assembly implementations have separate prolog for alignments
 130          more 48. */
 131       pos = random () & 511;
 132       if (pos + align >= 511)
 133         pos = 510 - align - (random () & 7);
 134       len = random () & 511;
 135       /* len for wcschr here isn't in bytes but it's number of wchar_t
 136          symbols.  */
 137       if (pos >= len)
 138         len = pos + (random () & 7);
 139       if (len + align >= 512)
 140         len = 511 - align - (random () & 7);
 141       seek_char = random () & 255;
 142       if (seek_char && pos == len)
 143         {
 144           if (pos)
 145             --pos;
 146           else
 147             ++len;
 148         }
 149       j = len + align + 64;
 150       if (j > 512)
 151         j = 512;
 152
 153       for (i = 0; i < j; i++)
 154         {
 155           if (i == pos + align)
 156             p[i] = seek_char;
 157           else if (i == len + align)
 158             p[i] = 0;
 159           else
 160             {
 161               p[i] = random () & 255;
 162               if (((i > pos + align && i < len + align) || pos > len)
 163                   && p[i] == seek_char)
 164                 p[i] = seek_char + 13;
 165               if (i < len + align && !p[i])
 166                 {
 167                   p[i] = seek_char - 13;
 168                   if (!p[i])
 169                     p[i] = 140;
 170                 }
 171             }
 172         }
 173
 174       if (pos <= len)
 175         result = (CHAR *) (p + pos + align);
 176       else if (seek_char == 0)
 177         result = (CHAR *) (p + len + align);
 178       else
 179         result = NULL;
 180
 181       FOR_EACH_IMPL (impl, 1)
 182         if (CALL (impl, (CHAR *) (p + align), seek_char) != result)
 183           {
 184             error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %d, %zd, %zd) %p != %p, p %p",
 185                    n, impl->name, align, seek_char, len, pos,
 186                    CALL (impl, (CHAR *) (p + align), seek_char), result, p);
 187             ret = 1;
 188           }
 189     }
 190 }
 191
 192 int
 193 test_main (void)
 194 {
 195   size_t i;
 196
 197   test_init ();
 198
 199   printf ("%20s", "");
 200   FOR_EACH_IMPL (impl, 0)
 201     printf ("\t%s", impl->name);
 202   putchar ('\n');
 203
 204   for (i = 1; i < 8; ++i)
 205     {
 206       do_test (0, 16 << i, 2048, 23, SMALL_CHAR);
 207       do_test (i, 16 << i, 2048, 23, SMALL_CHAR);
 208     }
 209
 210   for (i = 1; i < 8; ++i)
 211     {
 212       do_test (i, 64, 256, 23, SMALL_CHAR);
 213       do_test (i, 64, 256, 23, BIG_CHAR);
 214     }
 215
 216   for (i = 0; i < 32; ++i)
 217     {
 218       do_test (0, i, i + 1, 23, SMALL_CHAR);
 219       do_test (0, i, i + 1, 23, BIG_CHAR);
 220     }
 221
 222   for (i = 1; i < 8; ++i)
 223     {
 224       do_test (0, 16 << i, 2048, 0, SMALL_CHAR);
 225       do_test (i, 16 << i, 2048, 0, SMALL_CHAR);
 226     }
 227
 228   for (i = 1; i < 8; ++i)
 229     {
 230       do_test (i, 64, 256, 0, SMALL_CHAR);
 231       do_test (i, 64, 256, 0, BIG_CHAR);
 232     }
 233
 234   for (i = 0; i < 32; ++i)
 235     {
 236       do_test (0, i, i + 1, 0, SMALL_CHAR);
 237       do_test (0, i, i + 1, 0, BIG_CHAR);
 238     }
 239
 240   do_random_tests ();
 241   return ret;
 242 }
 243
 244 #include <support/test-driver.c>