string/test-strchr.c

   1 /* Test and measure strchr 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_strchr (const char *, int);
  26 char *stupid_strchr (const char *, int);
  27
  28 IMPL (stupid_strchr, 0)
  29 IMPL (simple_strchr, 0)
  30 IMPL (strchr, 1)
  31
  32 char *
  33 simple_strchr (const char *s, int c)
  34 {
  35   for (; *s != (char) c; ++s)
  36     if (*s == '\0')
  37       return NULL;
  38   return (char *) s;
  39 }
  40
  41 char *
  42 stupid_strchr (const char *s, int c)
  43 {
  44   size_t n = strlen (s) + 1;
  45
  46   while (n--)
  47     if (*s++ == (char) c)
  48       return (char *) s - 1;
  49   return NULL;
  50 }
  51
  52 static void
  53 do_one_test (impl_t *impl, const char *s, int c, char *exp_res)
  54 {
  55   char *res = CALL (impl, s, c);
  56   if (res != exp_res)
  57     {
  58       error (0, 0, "Wrong result in function %s %p %p", impl->name,
  59              res, exp_res);
  60       ret = 1;
  61       return;
  62     }
  63
  64   if (HP_TIMING_AVAIL)
  65     {
  66       hp_timing_t start __attribute ((unused));
  67       hp_timing_t stop __attribute ((unused));
  68       hp_timing_t best_time = ~ (hp_timing_t) 0;
  69       size_t i;
  70
  71       for (i = 0; i < 32; ++i)
  72         {
  73           HP_TIMING_NOW (start);
  74           CALL (impl, s, c);
  75           HP_TIMING_NOW (stop);
  76           HP_TIMING_BEST (best_time, start, stop);
  77         }
  78
  79       printf ("\t%zd", (size_t) best_time);
  80     }
  81 }
  82
  83 static void
  84 do_test (size_t align, size_t pos, size_t len, int seek_char, int max_char)
  85 {
  86   size_t i;
  87   char *result;
  88
  89   align &= 7;
  90   if (align + len >= page_size)
  91     return;
  92
  93   for (i = 0; i < len; ++i)
  94     {
  95       buf1[align + i] = 32 + 23 * i % (max_char - 32);
  96       if (buf1[align + i] == seek_char)
  97         buf1[align + i] = seek_char + 1;
  98     }
  99   buf1[align + len] = 0;
 100
 101   if (pos < len)
 102     {
 103       buf1[align + pos] = seek_char;
 104       result = buf1 + align + pos;
 105     }
 106   else if (seek_char == 0)
 107     result = buf1 + align + len;
 108   else
 109     result = NULL;
 110
 111   if (HP_TIMING_AVAIL)
 112     printf ("Length %4zd, alignment %2zd:", pos, align);
 113
 114   FOR_EACH_IMPL (impl, 0)
 115     do_one_test (impl, buf1 + align, seek_char, result);
 116
 117   if (HP_TIMING_AVAIL)
 118     putchar ('\n');
 119 }
 120
 121 static void
 122 do_random_tests (void)
 123 {
 124   size_t i, j, n, align, pos, len;
 125   int seek_char;
 126   char *result;
 127   unsigned char *p = buf1 + page_size - 512;
 128
 129   for (n = 0; n < ITERATIONS; n++)
 130     {
 131       align = random () & 15;
 132       pos = random () & 511;
 133       seek_char = random () & 255;
 134       if (pos + align >= 511)
 135         pos = 510 - align - (random () & 7);
 136       len = random () & 511;
 137       if ((pos == len && seek_char)
 138           || (pos > len && (random () & 1)))
 139         len = pos + 1 + (random () & 7);
 140       if (len + align >= 512)
 141         len = 511 - align - (random () & 7);
 142       if (pos == len && seek_char)
 143         len = pos + 1;
 144       j = (pos > len ? pos : len) + align + 64;
 145       if (j > 512)
 146         j = 512;
 147
 148       for (i = 0; i < j; i++)
 149         {
 150           if (i == pos + align)
 151             p[i] = seek_char;
 152           else if (i == len + align)
 153             p[i] = 0;
 154           else
 155             {
 156               p[i] = random () & 255;
 157               if (i < pos + align && p[i] == seek_char)
 158                 p[i] = seek_char + 13;
 159               if (i < len + align && !p[i])
 160                 {
 161                   p[i] = seek_char - 13;
 162                   if (!p[i])
 163                     p[i] = 140;
 164                 }
 165             }
 166         }
 167
 168       if (pos <= len)
 169         result = p + pos + align;
 170       else if (seek_char == 0)
 171         result = p + len + align;
 172       else
 173         result = NULL;
 174
 175       FOR_EACH_IMPL (impl, 1)
 176         if (CALL (impl, p + align, seek_char) != result)
 177           {
 178             error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %d, %zd, %zd) %p != %p, p %p",
 179                    n, impl->name, align, seek_char, len, pos,
 180                    CALL (impl, p + align, seek_char), result, p);
 181             ret = 1;
 182           }
 183     }
 184 }
 185
 186 int
 187 test_main (void)
 188 {
 189   size_t i;
 190
 191   test_init ();
 192
 193   printf ("%20s", "");
 194   FOR_EACH_IMPL (impl, 0)
 195     printf ("\t%s", impl->name);
 196   putchar ('\n');
 197
 198   for (i = 1; i < 8; ++i)
 199     {
 200       do_test (0, 16 << i, 2048, 23, 127);
 201       do_test (i, 16 << i, 2048, 23, 127);
 202     }
 203
 204   for (i = 1; i < 8; ++i)
 205     {
 206       do_test (i, 64, 256, 23, 127);
 207       do_test (i, 64, 256, 23, 255);
 208     }
 209
 210   for (i = 0; i < 32; ++i)
 211     {
 212       do_test (0, i, i + 1, 23, 127);
 213       do_test (0, i, i + 1, 23, 255);
 214     }
 215
 216   for (i = 1; i < 8; ++i)
 217     {
 218       do_test (0, 16 << i, 2048, 0, 127);
 219       do_test (i, 16 << i, 2048, 0, 127);
 220     }
 221
 222   for (i = 1; i < 8; ++i)
 223     {
 224       do_test (i, 64, 256, 0, 127);
 225       do_test (i, 64, 256, 0, 255);
 226     }
 227
 228   for (i = 0; i < 32; ++i)
 229     {
 230       do_test (0, i, i + 1, 0, 127);
 231       do_test (0, i, i + 1, 0, 255);
 232     }
 233
 234   do_random_tests ();
 235   return ret;
 236 }
 237
 238 #include "../test-skeleton.c"