string/test-strcat.c

   1 /* Test and measure strcat functions.
   2    Copyright (C) 1999-2015 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
  61 static void
  62 do_test (size_t align1, size_t align2, size_t len1, size_t len2, int max_char)
  63 {
  64   size_t i;
  65   char *s1, *s2;
  66
  67   align1 &= 7;
  68   if (align1 + len1 >= page_size)
  69     return;
  70
  71   align2 &= 7;
  72   if (align2 + len1 + len2 >= page_size)
  73     return;
  74
  75   s1 = (char *) (buf1 + align1);
  76   s2 = (char *) (buf2 + align2);
  77
  78   for (i = 0; i < len1; ++i)
  79     s1[i] = 32 + 23 * i % (max_char - 32);
  80   s1[len1] = '\0';
  81
  82   for (i = 0; i < len2; i++)
  83     s2[i] = 32 + 23 * i % (max_char - 32);
  84
  85   FOR_EACH_IMPL (impl, 0)
  86     {
  87       s2[len2] = '\0';
  88       do_one_test (impl, s2, s1);
  89     }
  90 }
  91
  92 static void
  93 do_random_tests (void)
  94 {
  95   size_t i, j, n, align1, align2, len1, len2;
  96   unsigned char *p1 = buf1 + page_size - 512;
  97   unsigned char *p2 = buf2 + page_size - 512;
  98   unsigned char *res;
  99
 100   for (n = 0; n < ITERATIONS; n++)
 101     {
 102       align1 = random () & 31;
 103       if (random () & 1)
 104         align2 = random () & 31;
 105       else
 106         align2 = align1 + (random () & 24);
 107       len1 = random () & 511;
 108       if (len1 + align2 > 512)
 109         len2 = random () & 7;
 110       else
 111         len2 = (512 - len1 - align2) * (random () & (1024 * 1024 - 1))
 112                / (1024 * 1024);
 113       j = align1;
 114       if (align2 + len2 > j)
 115         j = align2 + len2;
 116       if (len1 + j >= 511)
 117         len1 = 510 - j - (random () & 7);
 118       if (len1 >= 512)
 119         len1 = 0;
 120       if (align1 + len1 < 512 - 8)
 121         {
 122           j = 510 - align1 - len1 - (random () & 31);
 123           if (j > 0 && j < 512)
 124             align1 += j;
 125         }
 126       j = len1 + align1 + 64;
 127       if (j > 512)
 128         j = 512;
 129       for (i = 0; i < j; i++)
 130         {
 131           if (i == len1 + align1)
 132             p1[i] = 0;
 133           else
 134             {
 135               p1[i] = random () & 255;
 136               if (i >= align1 && i < len1 + align1 && !p1[i])
 137                 p1[i] = (random () & 127) + 3;
 138             }
 139         }
 140       for (i = 0; i < len2; i++)
 141         {
 142           buf1[i] = random () & 255;
 143           if (!buf1[i])
 144             buf1[i] = (random () & 127) + 3;
 145         }
 146       buf1[len2] = 0;
 147
 148       FOR_EACH_IMPL (impl, 1)
 149         {
 150           memset (p2 - 64, '\1', align2 + 64);
 151           memset (p2 + align2 + len2 + 1, '\1', 512 - align2 - len2 - 1);
 152           memcpy (p2 + align2, buf1, len2 + 1);
 153           res = (unsigned char *) CALL (impl, (char *) (p2 + align2),
 154                                         (char *) (p1 + align1));
 155           if (res != p2 + align2)
 156             {
 157               error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %zd, %zd %zd) %p != %p",
 158                      n, impl->name, align1, align2, len1, len2, res,
 159                      p2 + align2);
 160               ret = 1;
 161             }
 162           for (j = 0; j < align2 + 64; ++j)
 163             {
 164               if (p2[j - 64] != '\1')
 165                 {
 166                   error (0, 0, "Iteration %zd - garbage before, %s (%zd, %zd, %zd, %zd)",
 167                          n, impl->name, align1, align2, len1, len2);
 168                   ret = 1;
 169                   break;
 170                 }
 171             }
 172           if (memcmp (p2 + align2, buf1, len2))
 173             {
 174               error (0, 0, "Iteration %zd - garbage in string before, %s (%zd, %zd, %zd, %zd)",
 175                      n, impl->name, align1, align2, len1, len2);
 176               ret = 1;
 177             }
 178           for (j = align2 + len1 + len2 + 1; j < 512; ++j)
 179             {
 180               if (p2[j] != '\1')
 181                 {
 182                   error (0, 0, "Iteration %zd - garbage after, %s (%zd, %zd, %zd, %zd)",
 183                          n, impl->name, align1, align2, len1, len2);
 184                   ret = 1;
 185                   break;
 186                 }
 187             }
 188           if (memcmp (p1 + align1, p2 + align2 + len2, len1 + 1))
 189             {
 190               error (0, 0, "Iteration %zd - different strings, %s (%zd, %zd, %zd, %zd)",
 191                      n, impl->name, align1, align2, len1, len2);
 192               ret = 1;
 193             }
 194         }
 195     }
 196 }
 197
 198 int
 199 test_main (void)
 200 {
 201   size_t i;
 202
 203   test_init ();
 204
 205   printf ("%28s", "");
 206   FOR_EACH_IMPL (impl, 0)
 207     printf ("\t%s", impl->name);
 208   putchar ('\n');
 209
 210   for (i = 0; i < 16; ++i)
 211     {
 212       do_test (0, 0, i, i, 127);
 213       do_test (0, 0, i, i, 255);
 214       do_test (0, i, i, i, 127);
 215       do_test (i, 0, i, i, 255);
 216     }
 217
 218   for (i = 1; i < 8; ++i)
 219     {
 220       do_test (0, 0, 8 << i, 8 << i, 127);
 221       do_test (8 - i, 2 * i, 8 << i, 8 << i, 127);
 222       do_test (0, 0, 8 << i, 2 << i, 127);
 223       do_test (8 - i, 2 * i, 8 << i, 2 << i, 127);
 224     }
 225
 226   for (i = 1; i < 8; ++i)
 227     {
 228       do_test (i, 2 * i, 8 << i, 1, 127);
 229       do_test (2 * i, i, 8 << i, 1, 255);
 230       do_test (i, i, 8 << i, 10, 127);
 231       do_test (i, i, 8 << i, 10, 255);
 232     }
 233
 234   do_random_tests ();
 235   return ret;
 236 }
 237
 238 #include "../test-skeleton.c"