string/test-strlen.c

   1 /* Test and measure STRLEN functions.
   2    Copyright (C) 1999-2021 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    <https://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
  77 static void
  78 do_test (size_t align, size_t len)
  79 {
  80   size_t i;
  81
  82   align &= 63;
  83   if (align + sizeof (CHAR) * len >= page_size)
  84     return;
  85
  86   CHAR *buf = (CHAR *) (buf1);
  87
  88   for (i = 0; i < len; ++i)
  89     buf[align + i] = 1 + 11111 * i % MAX_CHAR;
  90   buf[align + len] = 0;
  91
  92   FOR_EACH_IMPL (impl, 0)
  93     do_one_test (impl, (CHAR *) (buf + align), len);
  94 }
  95
  96 static void
  97 do_random_tests (void)
  98 {
  99   size_t i, j, n, align, len;
 100   CHAR *p = (CHAR *) (buf1 + page_size - 512 * sizeof (CHAR));
 101
 102   for (n = 0; n < ITERATIONS; n++)
 103     {
 104       align = random () & 15;
 105       len = random () & 511;
 106       if (len + align > 510)
 107         len = 511 - align - (random () & 7);
 108       j = len + align + 64;
 109       if (j > 512)
 110         j = 512;
 111
 112       for (i = 0; i < j; i++)
 113         {
 114           if (i == len + align)
 115             p[i] = 0;
 116           else
 117             {
 118               p[i] = random () & 255;
 119               if (i >= align && i < len + align && !p[i])
 120                 p[i] = (random () & 127) + 1;
 121             }
 122         }
 123
 124       FOR_EACH_IMPL (impl, 1)
 125         if (CALL (impl, (CHAR *) (p + align)) != len)
 126           {
 127             error (0, 0, "Iteration %zd - wrong result in function %s (%zd) %zd != %zd, p %p",
 128                    n, impl->name, align, CALL (impl, (CHAR *) (p + align)),
 129                    len, p);
 130             ret = 1;
 131           }
 132     }
 133 }
 134
 135 int
 136 test_main (void)
 137 {
 138   size_t i;
 139
 140   test_init ();
 141
 142   printf ("%20s", "");
 143   FOR_EACH_IMPL (impl, 0)
 144     printf ("\t%s", impl->name);
 145   putchar ('\n');
 146
 147   /* Checking with only 4 * N alignments for wcslen, other alignments are wrong for wchar_t type arrays*/
 148
 149   for (i = 1; i < 8; ++i)
 150   {
 151     do_test (sizeof (CHAR) * i, i);
 152     do_test (0, i);
 153   }
 154
 155   for (i = 2; i <= 12; ++i)
 156     {
 157       do_test (0, 1 << i);
 158       do_test (sizeof (CHAR) * 7, 1 << i);
 159       do_test (sizeof (CHAR) * i, 1 << i);
 160       do_test (sizeof (CHAR) * i, (size_t)((1 << i) / 1.5));
 161     }
 162
 163   do_random_tests ();
 164   return ret;
 165 }
 166
 167 #include <support/test-driver.c>