string/test-strnlen.c

   1 /* Test and measure strlen 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 "strnlen"
  22 #include "test-string.h"
  23
  24 typedef size_t (*proto_t) (const char *, size_t);
  25 size_t simple_strnlen (const char *, size_t);
  26
  27 IMPL (simple_strnlen, 0)
  28 IMPL (strnlen, 1)
  29
  30 size_t
  31 simple_strnlen (const char *s, size_t maxlen)
  32 {
  33   size_t i;
  34
  35   for (i = 0; i < maxlen && s[i]; ++i);
  36   return i;
  37 }
  38
  39 static void
  40 do_one_test (impl_t *impl, const char *s, size_t maxlen, size_t exp_len)
  41 {
  42   size_t len = CALL (impl, s, maxlen);
  43   if (len != exp_len)
  44     {
  45       error (0, 0, "Wrong result in function %s %zd %zd", impl->name,
  46              len, exp_len);
  47       ret = 1;
  48       return;
  49     }
  50 }
  51
  52 static void
  53 do_test (size_t align, size_t len, size_t maxlen, int max_char)
  54 {
  55   size_t i;
  56
  57   align &= 7;
  58   if (align + len >= page_size)
  59     return;
  60
  61   for (i = 0; i < len; ++i)
  62     buf1[align + i] = 1 + 7 * i % max_char;
  63   buf1[align + len] = 0;
  64
  65   FOR_EACH_IMPL (impl, 0)
  66     do_one_test (impl, (char *) (buf1 + align), maxlen, MIN (len, maxlen));
  67 }
  68
  69 static void
  70 do_random_tests (void)
  71 {
  72   size_t i, j, n, align, len;
  73   unsigned char *p = buf1 + page_size - 512;
  74
  75   for (n = 0; n < ITERATIONS; n++)
  76     {
  77       align = random () & 15;
  78       len = random () & 511;
  79       if (len + align > 510)
  80         len = 511 - align - (random () & 7);
  81       j = len + align + 64;
  82       if (j > 512)
  83         j = 512;
  84
  85       for (i = 0; i < j; i++)
  86         {
  87           if (i == len + align)
  88             p[i] = 0;
  89           else
  90             {
  91               p[i] = random () & 255;
  92               if (i >= align && i < len + align && !p[i])
  93                 p[i] = (random () & 127) + 1;
  94             }
  95         }
  96
  97       FOR_EACH_IMPL (impl, 1)
  98         {
  99           if (len > 0
 100               && CALL (impl, (char *) (p + align), len - 1) != len - 1)
 101             {
 102               error (0, 0, "Iteration %zd (limited) - wrong result in function %s (%zd) %zd != %zd, p %p",
 103                      n, impl->name, align,
 104                      CALL (impl, (char *) (p + align), len - 1), len - 1, p);
 105               ret = 1;
 106             }
 107           if (CALL (impl, (char *) (p + align), len) != len)
 108             {
 109               error (0, 0, "Iteration %zd (exact) - wrong result in function %s (%zd) %zd != %zd, p %p",
 110                      n, impl->name, align,
 111                      CALL (impl, (char *) (p + align), len), len, p);
 112               ret = 1;
 113             }
 114           if (CALL (impl, (char *) (p + align), len + 1) != len)
 115             {
 116               error (0, 0, "Iteration %zd (long) - wrong result in function %s (%zd) %zd != %zd, p %p",
 117                      n, impl->name, align,
 118                      CALL (impl, (char *) (p + align), len + 1), len, p);
 119               ret = 1;
 120             }
 121         }
 122     }
 123 }
 124
 125 int
 126 test_main (void)
 127 {
 128   size_t i;
 129
 130   test_init ();
 131
 132   printf ("%20s", "");
 133   FOR_EACH_IMPL (impl, 0)
 134     printf ("\t%s", impl->name);
 135   putchar ('\n');
 136
 137   for (i = 1; i < 8; ++i)
 138     {
 139       do_test (0, i, i - 1, 127);
 140       do_test (0, i, i, 127);
 141       do_test (0, i, i + 1, 127);
 142     }
 143
 144   for (i = 1; i < 8; ++i)
 145     {
 146       do_test (i, i, i - 1, 127);
 147       do_test (i, i, i, 127);
 148       do_test (i, i, i + 1, 127);
 149     }
 150
 151   for (i = 2; i <= 10; ++i)
 152     {
 153       do_test (0, 1 << i, 5000, 127);
 154       do_test (1, 1 << i, 5000, 127);
 155     }
 156
 157   for (i = 1; i < 8; ++i)
 158     do_test (0, i, 5000, 255);
 159
 160   for (i = 1; i < 8; ++i)
 161     do_test (i, i, 5000, 255);
 162
 163   for (i = 2; i <= 10; ++i)
 164     {
 165       do_test (0, 1 << i, 5000, 255);
 166       do_test (1, 1 << i, 5000, 255);
 167     }
 168
 169   do_random_tests ();
 170   return ret;
 171 }
 172
 173 #include "../test-skeleton.c"