string/test-strcpy.c

   1 /* Test and measure strcpy 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 #ifndef STRCPY_RESULT
  22 # define STRCPY_RESULT(dst, len) dst
  23 # define TEST_MAIN
  24 # include "test-string.h"
  25
  26 char *simple_strcpy (char *, const char *);
  27
  28 IMPL (simple_strcpy, 0)
  29 IMPL (strcpy, 1)
  30
  31 char *
  32 simple_strcpy (char *dst, const char *src)
  33 {
  34   char *ret = dst;
  35   while ((*dst++ = *src++) != '\0');
  36   return ret;
  37 }
  38 #endif
  39
  40 typedef char *(*proto_t) (char *, const char *);
  41
  42 static void
  43 do_one_test (impl_t *impl, char *dst, const char *src,
  44              size_t len __attribute__((unused)))
  45 {
  46   if (CALL (impl, dst, src) != STRCPY_RESULT (dst, len))
  47     {
  48       error (0, 0, "Wrong result in function %s %p %p", impl->name,
  49              CALL (impl, dst, src), STRCPY_RESULT (dst, len));
  50       ret = 1;
  51       return;
  52     }
  53
  54   if (strcmp (dst, src) != 0)
  55     {
  56       error (0, 0, "Wrong result in function %s dst \"%s\" src \"%s\"",
  57              impl->name, dst, src);
  58       ret = 1;
  59       return;
  60     }
  61
  62   if (HP_TIMING_AVAIL)
  63     {
  64       hp_timing_t start __attribute ((unused));
  65       hp_timing_t stop __attribute ((unused));;
  66       hp_timing_t 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, dst, src);
  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 align1, size_t align2, size_t len, int max_char)
  83 {
  84   size_t i;
  85   char *s1, *s2;
  86
  87   align1 &= 7;
  88   if (align1 + len >= page_size)
  89     return;
  90
  91   align2 &= 7;
  92   if (align2 + len >= page_size)
  93     return;
  94
  95   s1 = buf1 + align1;
  96   s2 = buf2 + align2;
  97
  98   for (i = 0; i < len; i++)
  99     s1[i] = 32 + 23 * i % (max_char - 32);
 100   s1[len] = 0;
 101
 102   if (HP_TIMING_AVAIL)
 103     printf ("Length %4zd, alignment %2zd/%2zd:", len, align1, align2);
 104
 105   FOR_EACH_IMPL (impl, 0)
 106     do_one_test (impl, s2, s1, len);
 107
 108   if (HP_TIMING_AVAIL)
 109     putchar ('\n');
 110 }
 111
 112 static void
 113 do_random_tests (void)
 114 {
 115   size_t i, j, n, align1, align2, len;
 116   unsigned char *p1 = buf1 + page_size - 512;
 117   unsigned char *p2 = buf2 + page_size - 512;
 118   unsigned char *res;
 119
 120   for (n = 0; n < ITERATIONS; n++)
 121     {
 122       align1 = random () & 31;
 123       if (random () & 1)
 124         align2 = random () & 31;
 125       else
 126         align2 = align1 + (random () & 24);
 127       len = random () & 511;
 128       j = align1;
 129       if (align2 > j)
 130         j = align2;
 131       if (len + j >= 511)
 132         len = 510 - j - (random () & 7);
 133       j = len + align1 + 64;
 134       if (j > 512)
 135         j = 512;
 136       for (i = 0; i < j; i++)
 137         {
 138           if (i == len + align1)
 139             p1[i] = 0;
 140           else
 141             {
 142               p1[i] = random () & 255;
 143               if (i >= align1 && i < len + align1 && !p1[i])
 144                 p1[i] = (random () & 127) + 3;
 145             }
 146         }
 147
 148       FOR_EACH_IMPL (impl, 1)
 149         {
 150           memset (p2 - 64, '\1', 512 + 64);
 151           res = CALL (impl, p2 + align2, p1 + align1);
 152           if (res != STRCPY_RESULT (p2 + align2, len))
 153             {
 154               error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %zd, %zd) %p != %p",
 155                      n, impl->name, align1, align2, len, res,
 156                      STRCPY_RESULT (p2 + align2, len));
 157               ret = 1;
 158             }
 159           for (j = 0; j < align2 + 64; ++j)
 160             {
 161               if (p2[j - 64] != '\1')
 162                 {
 163                   error (0, 0, "Iteration %zd - garbage before, %s (%zd, %zd, %zd)",
 164                          n, impl->name, align1, align2, len);
 165                   ret = 1;
 166                   break;
 167                 }
 168             }
 169           for (j = align2 + len + 1; j < 512; ++j)
 170             {
 171               if (p2[j] != '\1')
 172                 {
 173                   error (0, 0, "Iteration %zd - garbage after, %s (%zd, %zd, %zd)",
 174                          n, impl->name, align1, align2, len);
 175                   ret = 1;
 176                   break;
 177                 }
 178             }
 179           if (memcmp (p1 + align1, p2 + align2, len + 1))
 180             {
 181               error (0, 0, "Iteration %zd - different strings, %s (%zd, %zd, %zd)",
 182                      n, impl->name, align1, align2, len);
 183               ret = 1;
 184             }
 185         }
 186     }
 187 }
 188
 189 int
 190 test_main (void)
 191 {
 192   size_t i;
 193
 194   test_init ();
 195
 196   printf ("%23s", "");
 197   FOR_EACH_IMPL (impl, 0)
 198     printf ("\t%s", impl->name);
 199   putchar ('\n');
 200
 201   for (i = 0; i < 16; ++i)
 202     {
 203       do_test (0, 0, i, 127);
 204       do_test (0, 0, i, 255);
 205       do_test (0, i, i, 127);
 206       do_test (i, 0, i, 255);
 207     }
 208
 209   for (i = 1; i < 8; ++i)
 210     {
 211       do_test (0, 0, 8 << i, 127);
 212       do_test (8 - i, 2 * i, 8 << i, 127);
 213     }
 214
 215   for (i = 1; i < 8; ++i)
 216     {
 217       do_test (i, 2 * i, 8 << i, 127);
 218       do_test (2 * i, i, 8 << i, 255);
 219       do_test (i, i, 8 << i, 127);
 220       do_test (i, i, 8 << i, 255);
 221     }
 222
 223   do_random_tests ();
 224   return ret;
 225 }
 226
 227 #include "../test-skeleton.c"