string/test-strlen.c

   1 /* Test and measure STRLEN functions.
   2    Copyright (C) 1999, 2002, 2003, 2005, 2011 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Written by Jakub Jelinek <jakub@redhat.com>, 1999.
   5    Added wcslen support by Liubov Dmitrieva <liubov.dmitrieva@gmail.com>, 2011
   6
   7    The GNU C Library is free software; you can redistribute it and/or
   8    modify it under the terms of the GNU Lesser General Public
   9    License as published by the Free Software Foundation; either
  10    version 2.1 of the License, or (at your option) any later version.
  11
  12    The GNU C Library is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15    Lesser General Public License for more details.
  16
  17    You should have received a copy of the GNU Lesser General Public
  18    License along with the GNU C Library; if not, see
  19    <http://www.gnu.org/licenses/>.  */
  20
  21 #define TEST_MAIN
  22 #include "test-string.h"
  23
  24 #ifndef WIDE
  25 # define STRLEN strlen
  26 # define CHAR char
  27 # define MAX_CHAR CHAR_MAX
  28 #else
  29 # include <wchar.h>
  30 # define STRLEN wcslen
  31 # define CHAR wchar_t
  32 # define MAX_CHAR WCHAR_MAX
  33 #endif
  34
  35 typedef size_t (*proto_t) (const CHAR *);
  36
  37 size_t
  38 simple_STRLEN (const CHAR *s)
  39 {
  40   const CHAR *p;
  41
  42   for (p = s; *p; ++p);
  43   return p - s;
  44 }
  45
  46 #ifndef WIDE
  47 size_t
  48 builtin_strlen (const CHAR *p)
  49 {
  50   return __builtin_strlen (p);
  51 }
  52 IMPL (builtin_strlen, 0)
  53 #endif
  54
  55 IMPL (simple_STRLEN, 0)
  56 IMPL (STRLEN, 1)
  57
  58
  59 static void
  60 do_one_test (impl_t *impl, const CHAR *s, size_t exp_len)
  61 {
  62   size_t len = CALL (impl, s);
  63   if (len != exp_len)
  64     {
  65       error (0, 0, "Wrong result in function %s %zd %zd", impl->name,
  66              len, exp_len);
  67       ret = 1;
  68       return;
  69     }
  70
  71   if (HP_TIMING_AVAIL)
  72     {
  73       hp_timing_t start __attribute ((unused));
  74       hp_timing_t stop __attribute ((unused));
  75       hp_timing_t best_time = ~ (hp_timing_t) 0;
  76       size_t i;
  77
  78       for (i = 0; i < 32; ++i)
  79         {
  80           HP_TIMING_NOW (start);
  81           CALL (impl, s);
  82           HP_TIMING_NOW (stop);
  83           HP_TIMING_BEST (best_time, start, stop);
  84         }
  85
  86       printf ("\t%zd", (size_t) best_time);
  87     }
  88 }
  89
  90 static void
  91 do_test (size_t align, size_t len)
  92 {
  93   size_t i;
  94
  95   align &= 63;
  96   if (align + sizeof(CHAR) * len >= page_size)
  97     return;
  98
  99   CHAR *buf = (CHAR *) (buf1);
 100
 101   for (i = 0; i < len; ++i)
 102     buf[align + i] = 1 + 11111 * i % MAX_CHAR;
 103   buf[align + len] = 0;
 104
 105   if (HP_TIMING_AVAIL)
 106     printf ("Length %4zd, alignment %2zd:", len, align);
 107
 108   FOR_EACH_IMPL (impl, 0)
 109     do_one_test (impl, (CHAR *) (buf + align), len);
 110
 111   if (HP_TIMING_AVAIL)
 112     putchar ('\n');
 113 }
 114
 115 static void
 116 do_random_tests (void)
 117 {
 118   size_t i, j, n, align, len;
 119   CHAR *p = (CHAR *) (buf1 + page_size - 512 * sizeof(CHAR));
 120
 121   for (n = 0; n < ITERATIONS; n++)
 122     {
 123       align = random () & 15;
 124       len = random () & 511;
 125       if (len + align > 510)
 126         len = 511 - align - (random () & 7);
 127       j = len + align + 64;
 128       if (j > 512)
 129         j = 512;
 130
 131       for (i = 0; i < j; i++)
 132         {
 133           if (i == len + align)
 134             p[i] = 0;
 135           else
 136             {
 137               p[i] = random () & 255;
 138               if (i >= align && i < len + align && !p[i])
 139                 p[i] = (random () & 127) + 1;
 140             }
 141         }
 142
 143       FOR_EACH_IMPL (impl, 1)
 144         if (CALL (impl, (CHAR *) (p + align)) != len)
 145           {
 146             error (0, 0, "Iteration %zd - wrong result in function %s (%zd) %zd != %zd, p %p",
 147                    n, impl->name, align, CALL (impl, (CHAR *) (p + align)),
 148                    len, p);
 149             ret = 1;
 150           }
 151     }
 152 }
 153
 154 int
 155 test_main (void)
 156 {
 157   size_t i;
 158
 159   test_init ();
 160
 161   printf ("%20s", "");
 162   FOR_EACH_IMPL (impl, 0)
 163     printf ("\t%s", impl->name);
 164   putchar ('\n');
 165
 166   /* Checking with only 4 * N alignments for wcslen, other alignments are wrong for wchar_t type arrays*/
 167
 168   for (i = 1; i < 8; ++i)
 169   {
 170     do_test (sizeof(CHAR) * i, i);
 171     do_test (0, i);
 172   }
 173
 174   for (i = 2; i <= 12; ++i)
 175     {
 176       do_test (0, 1 << i);
 177       do_test (sizeof(CHAR) * 7, 1 << i);
 178       do_test (sizeof(CHAR) * i, 1 << i);
 179       do_test (sizeof(CHAR) * i, (size_t)((1 << i) / 1.5));
 180     }
 181
 182   do_random_tests ();
 183   return ret;
 184 }
 185
 186 #include "../test-skeleton.c"