string/test-strcpy.c

   1 /* Test and measure strcpy 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 #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, stop, best_time = ~ (hp_timing_t) 0;
  65       size_t i;
  66
  67       for (i = 0; i < 32; ++i)
  68         {
  69           HP_TIMING_NOW (start);
  70           CALL (impl, dst, src);
  71           HP_TIMING_NOW (stop);
  72           HP_TIMING_BEST (best_time, start, stop);
  73         }
  74
  75       printf ("\t%zd", (size_t) best_time);
  76     }
  77 }
  78
  79 static void
  80 do_test (size_t align1, size_t align2, size_t len, int max_char)
  81 {
  82   size_t i;
  83   char *s1, *s2;
  84
  85   align1 &= 7;
  86   if (align1 + len >= page_size)
  87     return;
  88
  89   align2 &= 7;
  90   if (align2 + len >= page_size)
  91     return;
  92
  93   s1 = buf1 + align1;
  94   s2 = buf2 + align2;
  95
  96   for (i = 0; i < len; i++)
  97     s1[i] = 32 + 23 * i % (max_char - 32);
  98   s1[len] = 0;
  99
 100   if (HP_TIMING_AVAIL)
 101     printf ("Length %4zd, alignment %2zd/%2zd:", len, align1, align2);
 102
 103   FOR_EACH_IMPL (impl, 0)
 104     do_one_test (impl, s2, s1, len);
 105
 106   if (HP_TIMING_AVAIL)
 107     putchar ('\n');
 108 }
 109
 110 static void
 111 do_random_tests (void)
 112 {
 113   size_t i, j, n, align1, align2, len;
 114   unsigned char *p1 = buf1 + page_size - 512;
 115   unsigned char *p2 = buf2 + page_size - 512;
 116   unsigned char *res;
 117
 118   for (n = 0; n < ITERATIONS; n++)
 119     {
 120       align1 = random () & 31;
 121       if (random () & 1)
 122         align2 = random () & 31;
 123       else
 124         align2 = align1 + (random () & 24);
 125       len = random () & 511;
 126       j = align1;
 127       if (align2 > j)
 128         j = align2;
 129       if (len + j >= 511)
 130         len = 510 - j - (random () & 7);
 131       j = len + align1 + 64;
 132       if (j > 512)
 133         j = 512;
 134       for (i = 0; i < j; i++)
 135         {
 136           if (i == len + align1)
 137             p1[i] = 0;
 138           else
 139             {
 140               p1[i] = random () & 255;
 141               if (i >= align1 && i < len + align1 && !p1[i])
 142                 p1[i] = (random () & 127) + 3;
 143             }
 144         }
 145
 146       FOR_EACH_IMPL (impl, 1)
 147         {
 148           memset (p2 - 64, '\1', 512 + 64);
 149           res = CALL (impl, p2 + align2, p1 + align1);
 150           if (res != STRCPY_RESULT (p2 + align2, len))
 151             {
 152               error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %zd, %zd) %p != %p",
 153                      n, impl->name, align1, align2, len, res,
 154                      STRCPY_RESULT (p2 + align2, len));
 155               ret = 1;
 156             }
 157           for (j = 0; j < align2 + 64; ++j)
 158             {
 159               if (p2[j - 64] != '\1')
 160                 {
 161                   error (0, 0, "Iteration %zd - garbage before, %s (%zd, %zd, %zd)",
 162                          n, impl->name, align1, align2, len);
 163                   ret = 1;
 164                   break;
 165                 }
 166             }
 167           for (j = align2 + len + 1; j < 512; ++j)
 168             {
 169               if (p2[j] != '\1')
 170                 {
 171                   error (0, 0, "Iteration %zd - garbage after, %s (%zd, %zd, %zd)",
 172                          n, impl->name, align1, align2, len);
 173                   ret = 1;
 174                   break;
 175                 }
 176             }
 177           if (memcmp (p1 + align1, p2 + align2, len + 1))
 178             {
 179               error (0, 0, "Iteration %zd - different strings, %s (%zd, %zd, %zd)",
 180                      n, impl->name, align1, align2, len);
 181               ret = 1;
 182             }
 183         }
 184     }
 185 }
 186
 187 int
 188 test_main (void)
 189 {
 190   size_t i;
 191
 192   test_init ();
 193
 194   printf ("%23s", "");
 195   FOR_EACH_IMPL (impl, 0)
 196     printf ("\t%s", impl->name);
 197   putchar ('\n');
 198
 199   for (i = 0; i < 16; ++i)
 200     {
 201       do_test (0, 0, i, 127);
 202       do_test (0, 0, i, 255);
 203       do_test (0, i, i, 127);
 204       do_test (i, 0, i, 255);
 205     }
 206
 207   for (i = 1; i < 8; ++i)
 208     {
 209       do_test (0, 0, 8 << i, 127);
 210       do_test (8 - i, 2 * i, 8 << i, 127);
 211     }
 212
 213   for (i = 1; i < 8; ++i)
 214     {
 215       do_test (i, 2 * i, 8 << i, 127);
 216       do_test (2 * i, i, 8 << i, 255);
 217       do_test (i, i, 8 << i, 127);
 218       do_test (i, i, 8 << i, 255);
 219     }
 220
 221   do_random_tests ();
 222   return ret;
 223 }
 224
 225 #include "../test-skeleton.c"