string/test-strrchr.c

   1 /* Test and measure 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 wcsrrchr support by Liubov Dmitrieva <liubov.dmitrieva@gmail.com>,
   6    2011.
   7
   8    The GNU C Library is free software; you can redistribute it and/or
   9    modify it under the terms of the GNU Lesser General Public
  10    License as published by the Free Software Foundation; either
  11    version 2.1 of the License, or (at your option) any later version.
  12
  13    The GNU C Library is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16    Lesser General Public License for more details.
  17
  18    You should have received a copy of the GNU Lesser General Public
  19    License along with the GNU C Library; if not, see
  20    <https://www.gnu.org/licenses/>.  */
  21
  22 #define TEST_MAIN
  23 #ifdef WIDE
  24 # define TEST_NAME "wcsrchr"
  25 #else
  26 # define TEST_NAME "strrchr"
  27 #endif
  28 #include "test-string.h"
  29
  30 #ifdef WIDE
  31 # include <wchar.h>
  32 # define SIMPLE_STRRCHR simple_wcsrchr
  33 # define STRRCHR wcsrchr
  34 # define CHAR wchar_t
  35 # define UCHAR wchar_t
  36 # define BIG_CHAR WCHAR_MAX
  37 # define SMALL_CHAR 1273
  38 #else
  39 # define SIMPLE_STRRCHR simple_strrchr
  40 # define STRRCHR strrchr
  41 # define CHAR char
  42 # define UCHAR unsigned char
  43 # define BIG_CHAR CHAR_MAX
  44 # define SMALL_CHAR 127
  45 #endif
  46
  47 typedef CHAR *(*proto_t) (const CHAR *, int);
  48 CHAR *SIMPLE_STRRCHR (const CHAR *, int);
  49
  50 IMPL (SIMPLE_STRRCHR, 0)
  51 IMPL (STRRCHR, 1)
  52
  53 CHAR *
  54 SIMPLE_STRRCHR (const CHAR *s, int c)
  55 {
  56   const CHAR *ret = NULL;
  57
  58   for (; *s != '\0'; ++s)
  59     if (*s == (CHAR) c)
  60       ret = s;
  61
  62   return (CHAR *) (c == '\0' ? s : ret);
  63 }
  64
  65 static void
  66 do_one_test (impl_t *impl, const CHAR *s, int c, CHAR *exp_res)
  67 {
  68   CHAR *res = CALL (impl, s, c);
  69   if (res != exp_res)
  70     {
  71       error (0, 0, "Wrong result in function %s %p %p", impl->name,
  72              res, exp_res);
  73       ret = 1;
  74       return;
  75     }
  76 }
  77
  78 static void
  79 do_test (size_t align, size_t pos, size_t len, int seek_char, int max_char)
  80 /* For wcsrchr: align here means align not in bytes,
  81    but in wchar_ts, in bytes it will equal to align * (sizeof (wchar_t))
  82    len for wcschr here isn't in bytes but it's number of wchar_t symbols.  */
  83 {
  84   size_t i;
  85   CHAR *result;
  86   CHAR *buf = (CHAR *) buf1;
  87
  88   align &= 7;
  89   if ( (align + len) * sizeof (CHAR) >= page_size)
  90     return;
  91
  92   for (i = 0; i < len; ++i)
  93     {
  94       buf[align + i] = (random () * random ()) & max_char;
  95       if (!buf[align + i])
  96         buf[align + i] = (random () * random ()) & max_char;
  97       if (!buf[align + i])
  98         buf[align + i] = 1;
  99       if ((i > pos || pos >= len) && buf[align + i] == seek_char)
 100         buf[align + i] = seek_char + 10 + (random () & 15);
 101     }
 102   buf[align + len] = 0;
 103
 104   if (pos < len)
 105     {
 106       buf[align + pos] = seek_char;
 107       result = (CHAR *) (buf + align + pos);
 108     }
 109   else if (seek_char == 0)
 110     result = (CHAR *) (buf + align + len);
 111   else
 112     result = NULL;
 113
 114   FOR_EACH_IMPL (impl, 0)
 115     do_one_test (impl, (CHAR *) (buf + align), seek_char, result);
 116 }
 117
 118 static void
 119 do_random_tests (void)
 120 {
 121   size_t i, j, n, align, pos, len;
 122   int seek_char;
 123   CHAR *result;
 124   UCHAR *p = (UCHAR *) (buf1 + page_size) - 512;
 125
 126   for (n = 0; n < ITERATIONS; n++)
 127     {
 128       align = random () & (63 / sizeof (CHAR));
 129       /* For wcsrchr: align here means align not in bytes, but in wchar_ts,
 130          in bytes it will equal to align * (sizeof (wchar_t)).
 131          For strrchr we need to check all alignments from 0 to 63 since
 132          some assembly implementations have separate prolog for alignments
 133          more 48. */
 134       pos = random () & 511;
 135       if (pos + align >= 511)
 136         pos = 510 - align - (random () & 7);
 137       len = random () & 511;
 138       /* len for wcschr here isn't in bytes but it's number of wchar_t
 139          symbols.  */
 140       if (pos >= len)
 141         len = pos + (random () & 7);
 142       if (len + align >= 512)
 143         len = 511 - align - (random () & 7);
 144       seek_char = random () & 255;
 145       if (seek_char && pos == len)
 146         {
 147           if (pos)
 148             --pos;
 149           else
 150             ++len;
 151         }
 152       j = len + align + 64;
 153       if (j > 512)
 154         j = 512;
 155
 156       for (i = 0; i < j; i++)
 157         {
 158           if (i == pos + align)
 159             p[i] = seek_char;
 160           else if (i == len + align)
 161             p[i] = 0;
 162           else
 163             {
 164               p[i] = random () & 255;
 165               if (((i > pos + align && i < len + align) || pos > len)
 166                   && p[i] == seek_char)
 167                 p[i] = seek_char + 13;
 168               if (i < len + align && !p[i])
 169                 {
 170                   p[i] = seek_char - 13;
 171                   if (!p[i])
 172                     p[i] = 140;
 173                 }
 174             }
 175         }
 176
 177       if (pos <= len)
 178         result = (CHAR *) (p + pos + align);
 179       else if (seek_char == 0)
 180         result = (CHAR *) (p + len + align);
 181       else
 182         result = NULL;
 183
 184       FOR_EACH_IMPL (impl, 1)
 185         if (CALL (impl, (CHAR *) (p + align), seek_char) != result)
 186           {
 187             error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %d, %zd, %zd) %p != %p, p %p",
 188                    n, impl->name, align, seek_char, len, pos,
 189                    CALL (impl, (CHAR *) (p + align), seek_char), result, p);
 190             ret = 1;
 191           }
 192     }
 193 }
 194
 195 int
 196 test_main (void)
 197 {
 198   size_t i;
 199
 200   test_init ();
 201
 202   printf ("%20s", "");
 203   FOR_EACH_IMPL (impl, 0)
 204     printf ("\t%s", impl->name);
 205   putchar ('\n');
 206
 207   for (i = 1; i < 8; ++i)
 208     {
 209       do_test (0, 16 << i, 2048, 23, SMALL_CHAR);
 210       do_test (i, 16 << i, 2048, 23, SMALL_CHAR);
 211     }
 212
 213   for (i = 1; i < 8; ++i)
 214     {
 215       do_test (i, 64, 256, 23, SMALL_CHAR);
 216       do_test (i, 64, 256, 23, BIG_CHAR);
 217     }
 218
 219   for (i = 0; i < 32; ++i)
 220     {
 221       do_test (0, i, i + 1, 23, SMALL_CHAR);
 222       do_test (0, i, i + 1, 23, BIG_CHAR);
 223     }
 224
 225   for (i = 1; i < 8; ++i)
 226     {
 227       do_test (0, 16 << i, 2048, 0, SMALL_CHAR);
 228       do_test (i, 16 << i, 2048, 0, SMALL_CHAR);
 229     }
 230
 231   for (i = 1; i < 8; ++i)
 232     {
 233       do_test (i, 64, 256, 0, SMALL_CHAR);
 234       do_test (i, 64, 256, 0, BIG_CHAR);
 235     }
 236
 237   for (i = 0; i < 32; ++i)
 238     {
 239       do_test (0, i, i + 1, 0, SMALL_CHAR);
 240       do_test (0, i, i + 1, 0, BIG_CHAR);
 241     }
 242
 243   do_random_tests ();
 244   return ret;
 245 }
 246
 247 #include <support/test-driver.c>