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