string/test-strnlen.c

   1 /* Test and measure strlen functions.
   2    Copyright (C) 1999, 2002, 2003, 2005, 2010 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 size_t (*proto_t) (const char *, size_t);
  24 size_t simple_strnlen (const char *, size_t);
  25
  26 IMPL (simple_strnlen, 0)
  27 IMPL (strnlen, 1)
  28
  29 size_t
  30 simple_strnlen (const char *s, size_t maxlen)
  31 {
  32   size_t i;
  33
  34   for (i = 0; i < maxlen && s[i]; ++i);
  35   return i;
  36 }
  37
  38 static void
  39 do_one_test (impl_t *impl, const char *s, size_t maxlen, size_t exp_len)
  40 {
  41   size_t len = CALL (impl, s, maxlen);
  42   if (len != exp_len)
  43     {
  44       error (0, 0, "Wrong result in function %s %zd %zd", impl->name,
  45              len, exp_len);
  46       ret = 1;
  47       return;
  48     }
  49
  50   if (HP_TIMING_AVAIL)
  51     {
  52       hp_timing_t start __attribute ((unused));
  53       hp_timing_t stop __attribute ((unused));
  54       hp_timing_t best_time = ~ (hp_timing_t) 0;
  55       size_t i;
  56
  57       for (i = 0; i < 32; ++i)
  58         {
  59           HP_TIMING_NOW (start);
  60           CALL (impl, s, maxlen);
  61           HP_TIMING_NOW (stop);
  62           HP_TIMING_BEST (best_time, start, stop);
  63         }
  64
  65       printf ("\t%zd", (size_t) best_time);
  66     }
  67 }
  68
  69 static void
  70 do_test (size_t align, size_t len, size_t maxlen, int max_char)
  71 {
  72   size_t i;
  73
  74   align &= 7;
  75   if (align + len >= page_size)
  76     return;
  77
  78   for (i = 0; i < len; ++i)
  79     buf1[align + i] = 1 + 7 * i % max_char;
  80   buf1[align + len] = 0;
  81
  82   if (HP_TIMING_AVAIL)
  83     printf ("Length %4zd, alignment %2zd:", len, align);
  84
  85   FOR_EACH_IMPL (impl, 0)
  86     do_one_test (impl, (char *) (buf1 + align), maxlen, MIN (len, maxlen));
  87
  88   if (HP_TIMING_AVAIL)
  89     putchar ('\n');
  90 }
  91
  92 static void
  93 do_random_tests (void)
  94 {
  95   size_t i, j, n, align, len;
  96   unsigned char *p = buf1 + page_size - 512;
  97
  98   for (n = 0; n < ITERATIONS; n++)
  99     {
 100       align = random () & 15;
 101       len = random () & 511;
 102       if (len + align > 510)
 103         len = 511 - align - (random () & 7);
 104       j = len + align + 64;
 105       if (j > 512)
 106         j = 512;
 107
 108       for (i = 0; i < j; i++)
 109         {
 110           if (i == len + align)
 111             p[i] = 0;
 112           else
 113             {
 114               p[i] = random () & 255;
 115               if (i >= align && i < len + align && !p[i])
 116                 p[i] = (random () & 127) + 1;
 117             }
 118         }
 119
 120       FOR_EACH_IMPL (impl, 1)
 121         {
 122           if (len > 0
 123               && CALL (impl, (char *) (p + align), len - 1) != len - 1)
 124             {
 125               error (0, 0, "Iteration %zd (limited) - wrong result in function %s (%zd) %zd != %zd, p %p",
 126                      n, impl->name, align,
 127                      CALL (impl, (char *) (p + align), len - 1), len - 1, p);
 128               ret = 1;
 129             }
 130           if (CALL (impl, (char *) (p + align), len) != len)
 131             {
 132               error (0, 0, "Iteration %zd (exact) - wrong result in function %s (%zd) %zd != %zd, p %p",
 133                      n, impl->name, align,
 134                      CALL (impl, (char *) (p + align), len), len, p);
 135               ret = 1;
 136             }
 137           if (CALL (impl, (char *) (p + align), len + 1) != len)
 138             {
 139               error (0, 0, "Iteration %zd (long) - wrong result in function %s (%zd) %zd != %zd, p %p",
 140                      n, impl->name, align,
 141                      CALL (impl, (char *) (p + align), len + 1), len, p);
 142               ret = 1;
 143             }
 144         }
 145     }
 146 }
 147
 148 int
 149 test_main (void)
 150 {
 151   size_t i;
 152
 153   test_init ();
 154
 155   printf ("%20s", "");
 156   FOR_EACH_IMPL (impl, 0)
 157     printf ("\t%s", impl->name);
 158   putchar ('\n');
 159
 160   for (i = 1; i < 8; ++i)
 161     {
 162       do_test (0, i, i - 1, 127);
 163       do_test (0, i, i, 127);
 164       do_test (0, i, i + 1, 127);
 165     }
 166
 167   for (i = 1; i < 8; ++i)
 168     {
 169       do_test (i, i, i - 1, 127);
 170       do_test (i, i, i, 127);
 171       do_test (i, i, i + 1, 127);
 172     }
 173
 174   for (i = 2; i <= 10; ++i)
 175     {
 176       do_test (0, 1 << i, 5000, 127);
 177       do_test (1, 1 << i, 5000, 127);
 178     }
 179
 180   for (i = 1; i < 8; ++i)
 181     do_test (0, i, 5000, 255);
 182
 183   for (i = 1; i < 8; ++i)
 184     do_test (i, i, 5000, 255);
 185
 186   for (i = 2; i <= 10; ++i)
 187     {
 188       do_test (0, 1 << i, 5000, 255);
 189       do_test (1, 1 << i, 5000, 255);
 190     }
 191
 192   do_random_tests ();
 193   return ret;
 194 }
 195
 196 #include "../test-skeleton.c"