string/test-strchr.c

   1 /* Test and measure strchr functions.
   2    Copyright (C) 1999, 2002 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, stop, best_time = ~ (hp_timing_t) 0;
  67       size_t i;
  68
  69       for (i = 0; i < 32; ++i)
  70         {
  71           HP_TIMING_NOW (start);
  72           CALL (impl, s, c);
  73           HP_TIMING_NOW (stop);
  74           HP_TIMING_BEST (best_time, start, stop);
  75         }
  76
  77       printf ("\t%zd", (size_t) best_time);
  78     }
  79 }
  80
  81 static void
  82 do_test (size_t align, size_t pos, size_t len, int seek_char, int max_char)
  83 {
  84   size_t i;
  85   char *result;
  86
  87   align &= 7;
  88   if (align + len >= page_size)
  89     return;
  90
  91   for (i = 0; i < len; ++i)
  92     {
  93       buf1[align + i] = 32 + 23 * i % (max_char - 32);
  94       if (buf1[align + i] == seek_char)
  95         buf1[align + i] = seek_char + 1;
  96     }
  97   buf1[align + len] = 0;
  98
  99   if (pos < len)
 100     {
 101       buf1[align + pos] = seek_char;
 102       result = buf1 + align + pos;
 103     }
 104   else if (seek_char == 0)
 105     result = buf1 + align + len;
 106   else
 107     result = NULL;
 108
 109   if (HP_TIMING_AVAIL)
 110     printf ("Length %4zd, alignment %2zd:", pos, align);
 111
 112   FOR_EACH_IMPL (impl, 0)
 113     do_one_test (impl, buf1 + align, seek_char, result);
 114
 115   if (HP_TIMING_AVAIL)
 116     putchar ('\n');
 117 }
 118
 119 static void
 120 do_random_tests (void)
 121 {
 122   size_t i, j, n, align, pos, len;
 123   int seek_char;
 124   char *result;
 125   unsigned char *p = buf1 + page_size - 512;
 126
 127   for (n = 0; n < ITERATIONS; n++)
 128     {
 129       align = random () & 15;
 130       pos = random () & 511;
 131       seek_char = random () & 255;
 132       if (pos + align >= 511)
 133         pos = 510 - align - (random () & 7);
 134       len = random () & 511;
 135       if ((pos == len && seek_char)
 136           || (pos > len && (random () & 1)))
 137         len = pos + 1 + (random () & 7);
 138       if (len + align >= 512)
 139         len = 511 - align - (random () & 7);
 140       if (pos == len && seek_char)
 141         len = pos + 1;
 142       j = (pos > len ? pos : 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 && p[i] == seek_char)
 156                 p[i] = seek_char + 13;
 157               if (i < len + align && !p[i])
 158                 {
 159                   p[i] = seek_char - 13;
 160                   if (!p[i])
 161                     p[i] = 140;
 162                 }
 163             }
 164         }
 165
 166       if (pos <= len)
 167         result = p + pos + align;
 168       else if (seek_char == 0)
 169         result = p + len + align;
 170       else
 171         result = NULL;
 172
 173       FOR_EACH_IMPL (impl, 1)
 174         if (CALL (impl, p + align, seek_char) != result)
 175           {
 176             error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %d, %zd, %zd) %p != %p, p %p",
 177                    n, impl->name, align, seek_char, len, pos,
 178                    CALL (impl, p + align, seek_char), result, p);
 179             ret = 1;
 180           }
 181     }
 182 }
 183
 184 int
 185 test_main (void)
 186 {
 187   size_t i;
 188
 189   test_init ();
 190
 191   printf ("%20s", "");
 192   FOR_EACH_IMPL (impl, 0)
 193     printf ("\t%s", impl->name);
 194   putchar ('\n');
 195
 196   for (i = 1; i < 8; ++i)
 197     {
 198       do_test (0, 16 << i, 2048, 23, 127);
 199       do_test (i, 16 << i, 2048, 23, 127);
 200     }
 201
 202   for (i = 1; i < 8; ++i)
 203     {
 204       do_test (i, 64, 256, 23, 127);
 205       do_test (i, 64, 256, 23, 255);
 206     }
 207
 208   for (i = 0; i < 32; ++i)
 209     {
 210       do_test (0, i, i + 1, 23, 127);
 211       do_test (0, i, i + 1, 23, 255);
 212     }
 213
 214   for (i = 1; i < 8; ++i)
 215     {
 216       do_test (0, 16 << i, 2048, 0, 127);
 217       do_test (i, 16 << i, 2048, 0, 127);
 218     }
 219
 220   for (i = 1; i < 8; ++i)
 221     {
 222       do_test (i, 64, 256, 0, 127);
 223       do_test (i, 64, 256, 0, 255);
 224     }
 225
 226   for (i = 0; i < 32; ++i)
 227     {
 228       do_test (0, i, i + 1, 0, 127);
 229       do_test (0, i, i + 1, 0, 255);
 230     }
 231
 232   do_random_tests ();
 233   return ret;
 234 }
 235
 236 #include "../test-skeleton.c"