string/test-strrchr.c

   1 /* Test and measure STRCHR functions.
   2    Copyright (C) 1999, 2002, 2003, 2005, 2011 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    <http://www.gnu.org/licenses/>.  */
  21
  22 #define TEST_MAIN
  23 #include "test-string.h"
  24
  25 #ifdef WIDE
  26 # include <wchar.h>
  27 # define SIMPLE_STRRCHR simple_wcsrchr
  28 # define STRRCHR wcsrchr
  29 # define CHAR wchar_t
  30 # define UCHAR wchar_t
  31 # define BIG_CHAR WCHAR_MAX
  32 # define SMALL_CHAR 1273
  33 #else
  34 # define SIMPLE_STRRCHR simple_strrchr
  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 CHAR *SIMPLE_STRRCHR (const CHAR *, int);
  44
  45 IMPL (SIMPLE_STRRCHR, 0)
  46 IMPL (STRRCHR, 1)
  47
  48 CHAR *
  49 SIMPLE_STRRCHR (const CHAR *s, int c)
  50 {
  51   const CHAR *ret = NULL;
  52
  53   for (; *s != '\0'; ++s)
  54     if (*s == (CHAR) c)
  55       ret = s;
  56
  57   return (CHAR *) (c == '\0' ? s : ret);
  58 }
  59
  60 static void
  61 do_one_test (impl_t *impl, const CHAR *s, int c, CHAR *exp_res)
  62 {
  63   CHAR *res = CALL (impl, s, c);
  64   if (res != exp_res)
  65     {
  66       error (0, 0, "Wrong result in function %s %p %p", impl->name,
  67              res, exp_res);
  68       ret = 1;
  69       return;
  70     }
  71
  72   if (HP_TIMING_AVAIL)
  73     {
  74       hp_timing_t start __attribute ((unused));
  75       hp_timing_t stop __attribute ((unused));
  76       hp_timing_t best_time = ~ (hp_timing_t) 0;
  77       size_t i;
  78
  79       for (i = 0; i < 32; ++i)
  80         {
  81           HP_TIMING_NOW (start);
  82           CALL (impl, s, c);
  83           HP_TIMING_NOW (stop);
  84           HP_TIMING_BEST (best_time, start, stop);
  85         }
  86
  87       printf ("\t%zd", (size_t) best_time);
  88     }
  89 }
  90
  91 static void
  92 do_test (size_t align, size_t pos, size_t len, int seek_char, int max_char)
  93 /* For wcsrchr: align here means align not in bytes,
  94    but in wchar_ts, in bytes it will equal to align * (sizeof (wchar_t))
  95    len for wcschr here isn't in bytes but it's number of wchar_t symbols.  */
  96 {
  97   size_t i;
  98   CHAR *result;
  99   CHAR *buf = (CHAR *) buf1;
 100
 101   align &= 7;
 102   if ( (align + len) * sizeof(CHAR) >= page_size)
 103     return;
 104
 105   for (i = 0; i < len; ++i)
 106     {
 107       buf[align + i] = (random () * random ()) & max_char;
 108       if (!buf[align + i])
 109         buf[align + i] = (random () * random ()) & max_char;
 110       if (!buf[align + i])
 111         buf[align + i] = 1;
 112       if ((i > pos || pos >= len) && buf[align + i] == seek_char)
 113         buf[align + i] = seek_char + 10 + (random () & 15);
 114     }
 115   buf[align + len] = 0;
 116
 117   if (pos < len)
 118     {
 119       buf[align + pos] = seek_char;
 120       result = (CHAR *) (buf + align + pos);
 121     }
 122   else if (seek_char == 0)
 123     result = (CHAR *) (buf + align + len);
 124   else
 125     result = NULL;
 126
 127   if (HP_TIMING_AVAIL)
 128     printf ("Length %4zd, alignment in bytes %2zd:", pos, align * sizeof(CHAR));
 129
 130   FOR_EACH_IMPL (impl, 0)
 131     do_one_test (impl, (CHAR *) (buf + align), seek_char, result);
 132
 133   if (HP_TIMING_AVAIL)
 134     putchar ('\n');
 135 }
 136
 137 static void
 138 do_random_tests (void)
 139 {
 140   size_t i, j, n, align, pos, len;
 141   int seek_char;
 142   CHAR *result;
 143   UCHAR *p = (UCHAR *) (buf1 + page_size) - 512;
 144
 145   for (n = 0; n < ITERATIONS; n++)
 146     {
 147       align = random () & (63 / sizeof(CHAR));
 148       /* For wcsrchr: align here means align not in bytes, but in wchar_ts,
 149          in bytes it will equal to align * (sizeof (wchar_t)).
 150          For strrchr we need to check all alignments from 0 to 63 since
 151          some assembly implementations have separate prolog for alignments
 152          more 48. */
 153       pos = random () & 511;
 154       if (pos + align >= 511)
 155         pos = 510 - align - (random () & 7);
 156       len = random () & 511;
 157       /* len for wcschr here isn't in bytes but it's number of wchar_t
 158          symbols.  */
 159       if (pos >= len)
 160         len = pos + (random () & 7);
 161       if (len + align >= 512)
 162         len = 511 - align - (random () & 7);
 163       seek_char = random () & 255;
 164       if (seek_char && pos == len)
 165         {
 166           if (pos)
 167             --pos;
 168           else
 169             ++len;
 170         }
 171       j = len + align + 64;
 172       if (j > 512)
 173         j = 512;
 174
 175       for (i = 0; i < j; i++)
 176         {
 177           if (i == pos + align)
 178             p[i] = seek_char;
 179           else if (i == len + align)
 180             p[i] = 0;
 181           else
 182             {
 183               p[i] = random () & 255;
 184               if (((i > pos + align && i < len + align) || pos > len)
 185                   && p[i] == seek_char)
 186                 p[i] = seek_char + 13;
 187               if (i < len + align && !p[i])
 188                 {
 189                   p[i] = seek_char - 13;
 190                   if (!p[i])
 191                     p[i] = 140;
 192                 }
 193             }
 194         }
 195
 196       if (pos <= len)
 197         result = (CHAR *) (p + pos + align);
 198       else if (seek_char == 0)
 199         result = (CHAR *) (p + len + align);
 200       else
 201         result = NULL;
 202
 203       FOR_EACH_IMPL (impl, 1)
 204         if (CALL (impl, (CHAR *) (p + align), seek_char) != result)
 205           {
 206             error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %d, %zd, %zd) %p != %p, p %p",
 207                    n, impl->name, align, seek_char, len, pos,
 208                    CALL (impl, (CHAR *) (p + align), seek_char), result, p);
 209             ret = 1;
 210           }
 211     }
 212 }
 213
 214 int
 215 test_main (void)
 216 {
 217   size_t i;
 218
 219   test_init ();
 220
 221   printf ("%20s", "");
 222   FOR_EACH_IMPL (impl, 0)
 223     printf ("\t%s", impl->name);
 224   putchar ('\n');
 225
 226   for (i = 1; i < 8; ++i)
 227     {
 228       do_test (0, 16 << i, 2048, 23, SMALL_CHAR);
 229       do_test (i, 16 << i, 2048, 23, SMALL_CHAR);
 230     }
 231
 232   for (i = 1; i < 8; ++i)
 233     {
 234       do_test (i, 64, 256, 23, SMALL_CHAR);
 235       do_test (i, 64, 256, 23, BIG_CHAR);
 236     }
 237
 238   for (i = 0; i < 32; ++i)
 239     {
 240       do_test (0, i, i + 1, 23, SMALL_CHAR);
 241       do_test (0, i, i + 1, 23, BIG_CHAR);
 242     }
 243
 244   for (i = 1; i < 8; ++i)
 245     {
 246       do_test (0, 16 << i, 2048, 0, SMALL_CHAR);
 247       do_test (i, 16 << i, 2048, 0, SMALL_CHAR);
 248     }
 249
 250   for (i = 1; i < 8; ++i)
 251     {
 252       do_test (i, 64, 256, 0, SMALL_CHAR);
 253       do_test (i, 64, 256, 0, BIG_CHAR);
 254     }
 255
 256   for (i = 0; i < 32; ++i)
 257     {
 258       do_test (0, i, i + 1, 0, SMALL_CHAR);
 259       do_test (0, i, i + 1, 0, BIG_CHAR);
 260     }
 261
 262   do_random_tests ();
 263   return ret;
 264 }
 265
 266 #include "../test-skeleton.c"