string/test-strlen.c

   1 /* Test and measure STRLEN functions.
   2    Copyright (C) 1999-2012 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 #ifndef WIDE
  23 # define TEST_NAME "strlen"
  24 #else
  25 # define TEST_NAME "wcslen"
  26 #endif
  27 #include "test-string.h"
  28
  29 #ifndef WIDE
  30 # define STRLEN strlen
  31 # define CHAR char
  32 # define MAX_CHAR CHAR_MAX
  33 #else
  34 # include <wchar.h>
  35 # define STRLEN wcslen
  36 # define CHAR wchar_t
  37 # define MAX_CHAR WCHAR_MAX
  38 #endif
  39
  40 typedef size_t (*proto_t) (const CHAR *);
  41
  42 size_t
  43 simple_STRLEN (const CHAR *s)
  44 {
  45   const CHAR *p;
  46
  47   for (p = s; *p; ++p);
  48   return p - s;
  49 }
  50
  51 #ifndef WIDE
  52 size_t
  53 builtin_strlen (const CHAR *p)
  54 {
  55   return __builtin_strlen (p);
  56 }
  57 IMPL (builtin_strlen, 0)
  58 #endif
  59
  60 IMPL (simple_STRLEN, 0)
  61 IMPL (STRLEN, 1)
  62
  63
  64 static void
  65 do_one_test (impl_t *impl, const CHAR *s, size_t exp_len)
  66 {
  67   size_t len = CALL (impl, s);
  68   if (len != exp_len)
  69     {
  70       error (0, 0, "Wrong result in function %s %zd %zd", impl->name,
  71              len, exp_len);
  72       ret = 1;
  73       return;
  74     }
  75
  76   if (HP_TIMING_AVAIL)
  77     {
  78       hp_timing_t start __attribute ((unused));
  79       hp_timing_t stop __attribute ((unused));
  80       hp_timing_t best_time = ~ (hp_timing_t) 0;
  81       size_t i;
  82
  83       for (i = 0; i < 32; ++i)
  84         {
  85           HP_TIMING_NOW (start);
  86           CALL (impl, s);
  87           HP_TIMING_NOW (stop);
  88           HP_TIMING_BEST (best_time, start, stop);
  89         }
  90
  91       printf ("\t%zd", (size_t) best_time);
  92     }
  93 }
  94
  95 static void
  96 do_test (size_t align, size_t len)
  97 {
  98   size_t i;
  99
 100   align &= 63;
 101   if (align + sizeof(CHAR) * len >= page_size)
 102     return;
 103
 104   CHAR *buf = (CHAR *) (buf1);
 105
 106   for (i = 0; i < len; ++i)
 107     buf[align + i] = 1 + 11111 * i % MAX_CHAR;
 108   buf[align + len] = 0;
 109
 110   if (HP_TIMING_AVAIL)
 111     printf ("Length %4zd, alignment %2zd:", len, align);
 112
 113   FOR_EACH_IMPL (impl, 0)
 114     do_one_test (impl, (CHAR *) (buf + align), len);
 115
 116   if (HP_TIMING_AVAIL)
 117     putchar ('\n');
 118 }
 119
 120 static void
 121 do_random_tests (void)
 122 {
 123   size_t i, j, n, align, len;
 124   CHAR *p = (CHAR *) (buf1 + page_size - 512 * sizeof(CHAR));
 125
 126   for (n = 0; n < ITERATIONS; n++)
 127     {
 128       align = random () & 15;
 129       len = random () & 511;
 130       if (len + align > 510)
 131         len = 511 - align - (random () & 7);
 132       j = len + align + 64;
 133       if (j > 512)
 134         j = 512;
 135
 136       for (i = 0; i < j; i++)
 137         {
 138           if (i == len + align)
 139             p[i] = 0;
 140           else
 141             {
 142               p[i] = random () & 255;
 143               if (i >= align && i < len + align && !p[i])
 144                 p[i] = (random () & 127) + 1;
 145             }
 146         }
 147
 148       FOR_EACH_IMPL (impl, 1)
 149         if (CALL (impl, (CHAR *) (p + align)) != len)
 150           {
 151             error (0, 0, "Iteration %zd - wrong result in function %s (%zd) %zd != %zd, p %p",
 152                    n, impl->name, align, CALL (impl, (CHAR *) (p + align)),
 153                    len, p);
 154             ret = 1;
 155           }
 156     }
 157 }
 158
 159 int
 160 test_main (void)
 161 {
 162   size_t i;
 163
 164   test_init ();
 165
 166   printf ("%20s", "");
 167   FOR_EACH_IMPL (impl, 0)
 168     printf ("\t%s", impl->name);
 169   putchar ('\n');
 170
 171   /* Checking with only 4 * N alignments for wcslen, other alignments are wrong for wchar_t type arrays*/
 172
 173   for (i = 1; i < 8; ++i)
 174   {
 175     do_test (sizeof(CHAR) * i, i);
 176     do_test (0, i);
 177   }
 178
 179   for (i = 2; i <= 12; ++i)
 180     {
 181       do_test (0, 1 << i);
 182       do_test (sizeof(CHAR) * 7, 1 << i);
 183       do_test (sizeof(CHAR) * i, 1 << i);
 184       do_test (sizeof(CHAR) * i, (size_t)((1 << i) / 1.5));
 185     }
 186
 187   do_random_tests ();
 188   return ret;
 189 }
 190
 191 #include "../test-skeleton.c"