string/test-strcat.c

   1 /* Test and measure strcat functions.
   2    Copyright (C) 1999, 2002, 2003, 2005 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 #include "test-string.h"
  22
  23 typedef char *(*proto_t) (char *, const char *);
  24 char *simple_strcat (char *, const char *);
  25
  26 IMPL (simple_strcat, 0)
  27 IMPL (strcat, 1)
  28
  29 char *
  30 simple_strcat (char *dst, const char *src)
  31 {
  32   char *ret = dst;
  33   while (*dst++ != '\0');
  34   --dst;
  35   while ((*dst++ = *src++) != '\0');
  36   return ret;
  37 }
  38
  39 static void
  40 do_one_test (impl_t *impl, char *dst, const char *src)
  41 {
  42   size_t k = strlen (dst);
  43   if (CALL (impl, dst, src) != dst)
  44     {
  45       error (0, 0, "Wrong result in function %s %p %p", impl->name,
  46              CALL (impl, dst, src), dst);
  47       ret = 1;
  48       return;
  49     }
  50
  51   if (strcmp (dst + k, src) != 0)
  52     {
  53       error (0, 0, "Wrong result in function %s dst \"%s\" src \"%s\"",
  54              impl->name, dst, src);
  55       ret = 1;
  56       return;
  57     }
  58
  59   if (HP_TIMING_AVAIL)
  60     {
  61       hp_timing_t start __attribute ((unused));
  62       hp_timing_t stop __attribute ((unused));
  63       hp_timing_t best_time = ~ (hp_timing_t) 0;
  64       size_t i;
  65
  66       for (i = 0; i < 32; ++i)
  67         {
  68           dst[k] = '\0';
  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 len1, size_t len2, int max_char)
  81 {
  82   size_t i;
  83   char *s1, *s2;
  84
  85   align1 &= 7;
  86   if (align1 + len1 >= page_size)
  87     return;
  88
  89   align2 &= 7;
  90   if (align2 + len1 + len2 >= page_size)
  91     return;
  92
  93   s1 = (char *) (buf1 + align1);
  94   s2 = (char *) (buf2 + align2);
  95
  96   for (i = 0; i < len1; ++i)
  97     s1[i] = 32 + 23 * i % (max_char - 32);
  98   s1[len1] = '\0';
  99
 100   for (i = 0; i < len2; i++)
 101     s2[i] = 32 + 23 * i % (max_char - 32);
 102
 103   if (HP_TIMING_AVAIL)
 104     printf ("Length %4zd/%4zd, alignment %2zd/%2zd:", len1, len2, align1, align2);
 105
 106   FOR_EACH_IMPL (impl, 0)
 107     {
 108       s2[len2] = '\0';
 109       do_one_test (impl, s2, s1);
 110     }
 111
 112   if (HP_TIMING_AVAIL)
 113     putchar ('\n');
 114 }
 115
 116 static void
 117 do_random_tests (void)
 118 {
 119   size_t i, j, n, align1, align2, len1, len2;
 120   unsigned char *p1 = buf1 + page_size - 512;
 121   unsigned char *p2 = buf2 + page_size - 512;
 122   unsigned char *res;
 123
 124   for (n = 0; n < ITERATIONS; n++)
 125     {
 126       align1 = random () & 31;
 127       if (random () & 1)
 128         align2 = random () & 31;
 129       else
 130         align2 = align1 + (random () & 24);
 131       len1 = random () & 511;
 132       if (len1 + align2 > 512)
 133         len2 = random () & 7;
 134       else
 135         len2 = (512 - len1 - align2) * (random () & (1024 * 1024 - 1))
 136                / (1024 * 1024);
 137       j = align1;
 138       if (align2 + len2 > j)
 139         j = align2 + len2;
 140       if (len1 + j >= 511)
 141         len1 = 510 - j - (random () & 7);
 142       if (len1 >= 512)
 143         len1 = 0;
 144       if (align1 + len1 < 512 - 8)
 145         {
 146           j = 510 - align1 - len1 - (random () & 31);
 147           if (j > 0 && j < 512)
 148             align1 += j;
 149         }
 150       j = len1 + align1 + 64;
 151       if (j > 512)
 152         j = 512;
 153       for (i = 0; i < j; i++)
 154         {
 155           if (i == len1 + align1)
 156             p1[i] = 0;
 157           else
 158             {
 159               p1[i] = random () & 255;
 160               if (i >= align1 && i < len1 + align1 && !p1[i])
 161                 p1[i] = (random () & 127) + 3;
 162             }
 163         }
 164       for (i = 0; i < len2; i++)
 165         {
 166           buf1[i] = random () & 255;
 167           if (!buf1[i])
 168             buf1[i] = (random () & 127) + 3;
 169         }
 170       buf1[len2] = 0;
 171
 172       FOR_EACH_IMPL (impl, 1)
 173         {
 174           memset (p2 - 64, '\1', align2 + 64);
 175           memset (p2 + align2 + len2 + 1, '\1', 512 - align2 - len2 - 1);
 176           memcpy (p2 + align2, buf1, len2 + 1);
 177           res = (unsigned char *) CALL (impl, (char *) (p2 + align2),
 178                                         (char *) (p1 + align1));
 179           if (res != p2 + align2)
 180             {
 181               error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %zd, %zd %zd) %p != %p",
 182                      n, impl->name, align1, align2, len1, len2, res,
 183                      p2 + align2);
 184               ret = 1;
 185             }
 186           for (j = 0; j < align2 + 64; ++j)
 187             {
 188               if (p2[j - 64] != '\1')
 189                 {
 190                   error (0, 0, "Iteration %zd - garbage before, %s (%zd, %zd, %zd, %zd)",
 191                          n, impl->name, align1, align2, len1, len2);
 192                   ret = 1;
 193                   break;
 194                 }
 195             }
 196           if (memcmp (p2 + align2, buf1, len2))
 197             {
 198               error (0, 0, "Iteration %zd - garbage in string before, %s (%zd, %zd, %zd, %zd)",
 199                      n, impl->name, align1, align2, len1, len2);
 200               ret = 1;
 201             }
 202           for (j = align2 + len1 + len2 + 1; j < 512; ++j)
 203             {
 204               if (p2[j] != '\1')
 205                 {
 206                   error (0, 0, "Iteration %zd - garbage after, %s (%zd, %zd, %zd, %zd)",
 207                          n, impl->name, align1, align2, len1, len2);
 208                   ret = 1;
 209                   break;
 210                 }
 211             }
 212           if (memcmp (p1 + align1, p2 + align2 + len2, len1 + 1))
 213             {
 214               error (0, 0, "Iteration %zd - different strings, %s (%zd, %zd, %zd, %zd)",
 215                      n, impl->name, align1, align2, len1, len2);
 216               ret = 1;
 217             }
 218         }
 219     }
 220 }
 221
 222 int
 223 test_main (void)
 224 {
 225   size_t i;
 226
 227   test_init ();
 228
 229   printf ("%28s", "");
 230   FOR_EACH_IMPL (impl, 0)
 231     printf ("\t%s", impl->name);
 232   putchar ('\n');
 233
 234   for (i = 0; i < 16; ++i)
 235     {
 236       do_test (0, 0, i, i, 127);
 237       do_test (0, 0, i, i, 255);
 238       do_test (0, i, i, i, 127);
 239       do_test (i, 0, i, i, 255);
 240     }
 241
 242   for (i = 1; i < 8; ++i)
 243     {
 244       do_test (0, 0, 8 << i, 8 << i, 127);
 245       do_test (8 - i, 2 * i, 8 << i, 8 << i, 127);
 246       do_test (0, 0, 8 << i, 2 << i, 127);
 247       do_test (8 - i, 2 * i, 8 << i, 2 << i, 127);
 248     }
 249
 250   for (i = 1; i < 8; ++i)
 251     {
 252       do_test (i, 2 * i, 8 << i, 1, 127);
 253       do_test (2 * i, i, 8 << i, 1, 255);
 254       do_test (i, i, 8 << i, 10, 127);
 255       do_test (i, i, 8 << i, 10, 255);
 256     }
 257
 258   do_random_tests ();
 259   return ret;
 260 }
 261
 262 #include "../test-skeleton.c"