string/test-strcat.c

   1 /* Test and measure strcat functions.
   2    Copyright (C) 1999-2013 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, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #define TEST_MAIN
  21 #define TEST_NAME "strcat"
  22 #include "test-string.h"
  23
  24 typedef char *(*proto_t) (char *, const char *);
  25 char *simple_strcat (char *, const char *);
  26
  27 IMPL (simple_strcat, 0)
  28 IMPL (strcat, 1)
  29
  30 char *
  31 simple_strcat (char *dst, const char *src)
  32 {
  33   char *ret = dst;
  34   while (*dst++ != '\0');
  35   --dst;
  36   while ((*dst++ = *src++) != '\0');
  37   return ret;
  38 }
  39
  40 static void
  41 do_one_test (impl_t *impl, char *dst, const char *src)
  42 {
  43   size_t k = strlen (dst);
  44   if (CALL (impl, dst, src) != dst)
  45     {
  46       error (0, 0, "Wrong result in function %s %p %p", impl->name,
  47              CALL (impl, dst, src), dst);
  48       ret = 1;
  49       return;
  50     }
  51
  52   if (strcmp (dst + k, src) != 0)
  53     {
  54       error (0, 0, "Wrong result in function %s dst \"%s\" src \"%s\"",
  55              impl->name, dst, src);
  56       ret = 1;
  57       return;
  58     }
  59
  60   if (HP_TIMING_AVAIL)
  61     {
  62       hp_timing_t start __attribute ((unused));
  63       hp_timing_t stop __attribute ((unused));
  64       hp_timing_t best_time = ~ (hp_timing_t) 0;
  65       size_t i;
  66
  67       for (i = 0; i < 32; ++i)
  68         {
  69           dst[k] = '\0';
  70           HP_TIMING_NOW (start);
  71           CALL (impl, dst, src);
  72           HP_TIMING_NOW (stop);
  73           HP_TIMING_BEST (best_time, start, stop);
  74         }
  75
  76       printf ("\t%zd", (size_t) best_time);
  77     }
  78 }
  79
  80 static void
  81 do_test (size_t align1, size_t align2, size_t len1, size_t len2, int max_char)
  82 {
  83   size_t i;
  84   char *s1, *s2;
  85
  86   align1 &= 7;
  87   if (align1 + len1 >= page_size)
  88     return;
  89
  90   align2 &= 7;
  91   if (align2 + len1 + len2 >= page_size)
  92     return;
  93
  94   s1 = (char *) (buf1 + align1);
  95   s2 = (char *) (buf2 + align2);
  96
  97   for (i = 0; i < len1; ++i)
  98     s1[i] = 32 + 23 * i % (max_char - 32);
  99   s1[len1] = '\0';
 100
 101   for (i = 0; i < len2; i++)
 102     s2[i] = 32 + 23 * i % (max_char - 32);
 103
 104   if (HP_TIMING_AVAIL)
 105     printf ("Length %4zd/%4zd, alignment %2zd/%2zd:", len1, len2, align1, align2);
 106
 107   FOR_EACH_IMPL (impl, 0)
 108     {
 109       s2[len2] = '\0';
 110       do_one_test (impl, s2, s1);
 111     }
 112
 113   if (HP_TIMING_AVAIL)
 114     putchar ('\n');
 115 }
 116
 117 static void
 118 do_random_tests (void)
 119 {
 120   size_t i, j, n, align1, align2, len1, len2;
 121   unsigned char *p1 = buf1 + page_size - 512;
 122   unsigned char *p2 = buf2 + page_size - 512;
 123   unsigned char *res;
 124
 125   for (n = 0; n < ITERATIONS; n++)
 126     {
 127       align1 = random () & 31;
 128       if (random () & 1)
 129         align2 = random () & 31;
 130       else
 131         align2 = align1 + (random () & 24);
 132       len1 = random () & 511;
 133       if (len1 + align2 > 512)
 134         len2 = random () & 7;
 135       else
 136         len2 = (512 - len1 - align2) * (random () & (1024 * 1024 - 1))
 137                / (1024 * 1024);
 138       j = align1;
 139       if (align2 + len2 > j)
 140         j = align2 + len2;
 141       if (len1 + j >= 511)
 142         len1 = 510 - j - (random () & 7);
 143       if (len1 >= 512)
 144         len1 = 0;
 145       if (align1 + len1 < 512 - 8)
 146         {
 147           j = 510 - align1 - len1 - (random () & 31);
 148           if (j > 0 && j < 512)
 149             align1 += j;
 150         }
 151       j = len1 + align1 + 64;
 152       if (j > 512)
 153         j = 512;
 154       for (i = 0; i < j; i++)
 155         {
 156           if (i == len1 + align1)
 157             p1[i] = 0;
 158           else
 159             {
 160               p1[i] = random () & 255;
 161               if (i >= align1 && i < len1 + align1 && !p1[i])
 162                 p1[i] = (random () & 127) + 3;
 163             }
 164         }
 165       for (i = 0; i < len2; i++)
 166         {
 167           buf1[i] = random () & 255;
 168           if (!buf1[i])
 169             buf1[i] = (random () & 127) + 3;
 170         }
 171       buf1[len2] = 0;
 172
 173       FOR_EACH_IMPL (impl, 1)
 174         {
 175           memset (p2 - 64, '\1', align2 + 64);
 176           memset (p2 + align2 + len2 + 1, '\1', 512 - align2 - len2 - 1);
 177           memcpy (p2 + align2, buf1, len2 + 1);
 178           res = (unsigned char *) CALL (impl, (char *) (p2 + align2),
 179                                         (char *) (p1 + align1));
 180           if (res != p2 + align2)
 181             {
 182               error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %zd, %zd %zd) %p != %p",
 183                      n, impl->name, align1, align2, len1, len2, res,
 184                      p2 + align2);
 185               ret = 1;
 186             }
 187           for (j = 0; j < align2 + 64; ++j)
 188             {
 189               if (p2[j - 64] != '\1')
 190                 {
 191                   error (0, 0, "Iteration %zd - garbage before, %s (%zd, %zd, %zd, %zd)",
 192                          n, impl->name, align1, align2, len1, len2);
 193                   ret = 1;
 194                   break;
 195                 }
 196             }
 197           if (memcmp (p2 + align2, buf1, len2))
 198             {
 199               error (0, 0, "Iteration %zd - garbage in string before, %s (%zd, %zd, %zd, %zd)",
 200                      n, impl->name, align1, align2, len1, len2);
 201               ret = 1;
 202             }
 203           for (j = align2 + len1 + len2 + 1; j < 512; ++j)
 204             {
 205               if (p2[j] != '\1')
 206                 {
 207                   error (0, 0, "Iteration %zd - garbage after, %s (%zd, %zd, %zd, %zd)",
 208                          n, impl->name, align1, align2, len1, len2);
 209                   ret = 1;
 210                   break;
 211                 }
 212             }
 213           if (memcmp (p1 + align1, p2 + align2 + len2, len1 + 1))
 214             {
 215               error (0, 0, "Iteration %zd - different strings, %s (%zd, %zd, %zd, %zd)",
 216                      n, impl->name, align1, align2, len1, len2);
 217               ret = 1;
 218             }
 219         }
 220     }
 221 }
 222
 223 int
 224 test_main (void)
 225 {
 226   size_t i;
 227
 228   test_init ();
 229
 230   printf ("%28s", "");
 231   FOR_EACH_IMPL (impl, 0)
 232     printf ("\t%s", impl->name);
 233   putchar ('\n');
 234
 235   for (i = 0; i < 16; ++i)
 236     {
 237       do_test (0, 0, i, i, 127);
 238       do_test (0, 0, i, i, 255);
 239       do_test (0, i, i, i, 127);
 240       do_test (i, 0, i, i, 255);
 241     }
 242
 243   for (i = 1; i < 8; ++i)
 244     {
 245       do_test (0, 0, 8 << i, 8 << i, 127);
 246       do_test (8 - i, 2 * i, 8 << i, 8 << i, 127);
 247       do_test (0, 0, 8 << i, 2 << i, 127);
 248       do_test (8 - i, 2 * i, 8 << i, 2 << i, 127);
 249     }
 250
 251   for (i = 1; i < 8; ++i)
 252     {
 253       do_test (i, 2 * i, 8 << i, 1, 127);
 254       do_test (2 * i, i, 8 << i, 1, 255);
 255       do_test (i, i, 8 << i, 10, 127);
 256       do_test (i, i, 8 << i, 10, 255);
 257     }
 258
 259   do_random_tests ();
 260   return ret;
 261 }
 262
 263 #include "../test-skeleton.c"