string/test-strrchr.c

   1 /* Test and measure strrchr functions.
   2    Copyright (C) 1999, 2002, 2003 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Written by Jakub Jelinek <jakub@redhat.com>, 1999.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 #define TEST_MAIN
  22 #include "test-string.h"
  23
  24 typedef char *(*proto_t) (const char *, int);
  25 char *simple_strrchr (const char *, int);
  26
  27 IMPL (simple_strrchr, 0)
  28 IMPL (strrchr, 1)
  29
  30 char *
  31 simple_strrchr (const char *s, int c)
  32 {
  33   const char *ret = NULL;
  34
  35   for (; *s != '\0'; ++s)
  36     if (*s == (char) c)
  37       ret = s;
  38
  39   return (char *) (c == '\0' ? s : ret);
  40 }
  41
  42 static void
  43 do_one_test (impl_t *impl, const char *s, int c, char *exp_res)
  44 {
  45   char *res = CALL (impl, s, c);
  46   if (res != exp_res)
  47     {
  48       error (0, 0, "Wrong result in function %s %p %p", impl->name,
  49              res, exp_res);
  50       ret = 1;
  51       return;
  52     }
  53
  54   if (HP_TIMING_AVAIL)
  55     {
  56       hp_timing_t start __attribute ((unused));
  57       hp_timing_t stop __attribute ((unused));
  58       hp_timing_t best_time = ~ (hp_timing_t) 0;
  59       size_t i;
  60
  61       for (i = 0; i < 32; ++i)
  62         {
  63           HP_TIMING_NOW (start);
  64           CALL (impl, s, c);
  65           HP_TIMING_NOW (stop);
  66           HP_TIMING_BEST (best_time, start, stop);
  67         }
  68
  69       printf ("\t%zd", (size_t) best_time);
  70     }
  71 }
  72
  73 static void
  74 do_test (size_t align, size_t pos, size_t len, int seek_char, int max_char)
  75 {
  76   size_t i;
  77   char *result;
  78
  79   align &= 7;
  80   if (align + len >= page_size)
  81     return;
  82
  83   for (i = 0; i < len; ++i)
  84     {
  85       buf1[align + i] = random () & max_char;
  86       if (!buf1[align + i])
  87         buf1[align + i] = random () & max_char;
  88       if (!buf1[align + i])
  89         buf1[align + i] = 1;
  90       if ((i > pos || pos >= len) && buf1[align + i] == seek_char)
  91         buf1[align + i] = seek_char + 10 + (random () & 15);
  92     }
  93   buf1[align + len] = 0;
  94
  95   if (pos < len)
  96     {
  97       buf1[align + pos] = seek_char;
  98       result = buf1 + align + pos;
  99     }
 100   else if (seek_char == 0)
 101     result = buf1 + align + len;
 102   else
 103     result = NULL;
 104
 105   if (HP_TIMING_AVAIL)
 106     printf ("Length %4zd, alignment %2zd:", pos, align);
 107
 108   FOR_EACH_IMPL (impl, 0)
 109     do_one_test (impl, buf1 + align, seek_char, result);
 110
 111   if (HP_TIMING_AVAIL)
 112     putchar ('\n');
 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   unsigned char *p = buf1 + page_size - 512;
 122
 123   for (n = 0; n < ITERATIONS; n++)
 124     {
 125       align = random () & 15;
 126       pos = random () & 511;
 127       if (pos + align >= 511)
 128         pos = 510 - align - (random () & 7);
 129       len = random () & 511;
 130       if (pos >= len)
 131         len = pos + (random () & 7);
 132       if (len + align >= 512)
 133         len = 511 - align - (random () & 7);
 134       seek_char = random () & 255;
 135       if (seek_char && pos == len)
 136         {
 137           if (pos)
 138             --pos;
 139           else
 140             ++len;
 141         }
 142       j = len + align + 64;
 143       if (j > 512)
 144         j = 512;
 145
 146       for (i = 0; i < j; i++)
 147         {
 148           if (i == pos + align)
 149             p[i] = seek_char;
 150           else if (i == len + align)
 151             p[i] = 0;
 152           else
 153             {
 154               p[i] = random () & 255;
 155               if (((i > pos + align && i < len + align) || pos > len)
 156                   && p[i] == seek_char)
 157                 p[i] = seek_char + 13;
 158               if (i < len + align && !p[i])
 159                 {
 160                   p[i] = seek_char - 13;
 161                   if (!p[i])
 162                     p[i] = 140;
 163                 }
 164             }
 165         }
 166
 167       if (pos <= len)
 168         result = p + pos + align;
 169       else if (seek_char == 0)
 170         result = p + len + align;
 171       else
 172         result = NULL;
 173
 174       FOR_EACH_IMPL (impl, 1)
 175         if (CALL (impl, p + align, seek_char) != result)
 176           {
 177             error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %d, %zd, %zd) %p != %p, p %p",
 178                    n, impl->name, align, seek_char, len, pos,
 179                    CALL (impl, p + align, seek_char), result, p);
 180             ret = 1;
 181           }
 182     }
 183 }
 184
 185 int
 186 test_main (void)
 187 {
 188   size_t i;
 189
 190   test_init ();
 191
 192   printf ("%20s", "");
 193   FOR_EACH_IMPL (impl, 0)
 194     printf ("\t%s", impl->name);
 195   putchar ('\n');
 196
 197   for (i = 1; i < 8; ++i)
 198     {
 199       do_test (0, 16 << i, 2048, 23, 127);
 200       do_test (i, 16 << i, 2048, 23, 127);
 201     }
 202
 203   for (i = 1; i < 8; ++i)
 204     {
 205       do_test (i, 64, 256, 23, 127);
 206       do_test (i, 64, 256, 23, 255);
 207     }
 208
 209   for (i = 0; i < 32; ++i)
 210     {
 211       do_test (0, i, i + 1, 23, 127);
 212       do_test (0, i, i + 1, 23, 255);
 213     }
 214
 215   for (i = 1; i < 8; ++i)
 216     {
 217       do_test (0, 16 << i, 2048, 0, 127);
 218       do_test (i, 16 << i, 2048, 0, 127);
 219     }
 220
 221   for (i = 1; i < 8; ++i)
 222     {
 223       do_test (i, 64, 256, 0, 127);
 224       do_test (i, 64, 256, 0, 255);
 225     }
 226
 227   for (i = 0; i < 32; ++i)
 228     {
 229       do_test (0, i, i + 1, 0, 127);
 230       do_test (0, i, i + 1, 0, 255);
 231     }
 232
 233   do_random_tests ();
 234   return ret;
 235 }
 236
 237 #include "../test-skeleton.c"