string/test-memchr.c

   1 /* Test memchr functions.
   2    Copyright (C) 1999-2017 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 #ifndef WIDE
  22 # define TEST_NAME "memchr"
  23 #else
  24 # define TEST_NAME "wmemchr"
  25 #endif /* WIDE */
  26 #include "test-string.h"
  27
  28 #ifndef WIDE
  29 # define MEMCHR memchr
  30 # define CHAR char
  31 # define UCHAR unsigned char
  32 # define SIMPLE_MEMCHR simple_memchr
  33 # define BIG_CHAR CHAR_MAX
  34 # define SMALL_CHAR 127
  35 #else
  36 # include <wchar.h>
  37 # define MEMCHR wmemchr
  38 # define CHAR wchar_t
  39 # define UCHAR wchar_t
  40 # define SIMPLE_MEMCHR simple_wmemchr
  41 # define BIG_CHAR WCHAR_MAX
  42 # define SMALL_CHAR 1273
  43 #endif /* WIDE */
  44
  45 typedef CHAR *(*proto_t) (const CHAR *, int, size_t);
  46 CHAR *SIMPLE_MEMCHR (const CHAR *, int, size_t);
  47
  48 IMPL (SIMPLE_MEMCHR, 0)
  49 IMPL (MEMCHR, 1)
  50
  51 CHAR *
  52 SIMPLE_MEMCHR (const CHAR *s, int c, size_t n)
  53 {
  54   while (n--)
  55     if (*s++ == (CHAR) c)
  56       return (CHAR *) s - 1;
  57   return NULL;
  58 }
  59
  60 static void
  61 do_one_test (impl_t *impl, const CHAR *s, int c, size_t n, CHAR *exp_res)
  62 {
  63   CHAR *res = CALL (impl, s, c, n);
  64   if (res != exp_res)
  65     {
  66       error (0, 0, "Wrong result in function %s %p %p", impl->name,
  67              res, exp_res);
  68       ret = 1;
  69       return;
  70     }
  71 }
  72
  73 static void
  74 do_test (size_t align, size_t pos, size_t len, size_t n, int seek_char)
  75 {
  76   size_t i;
  77   CHAR *result;
  78
  79   if ((align + len) * sizeof (CHAR) >= page_size)
  80     return;
  81
  82   CHAR *buf = (CHAR *) (buf1);
  83
  84   for (i = 0; i < len; ++i)
  85     {
  86       buf[align + i] = 1 + 23 * i % SMALL_CHAR;
  87       if (buf[align + i] == seek_char)
  88         buf[align + i] = seek_char + 1;
  89     }
  90   buf[align + len] = 0;
  91
  92   if (pos < len)
  93     {
  94       buf[align + pos] = seek_char;
  95       buf[align + len] = -seek_char;
  96       result = (CHAR *) (buf + align + pos);
  97     }
  98   else
  99     {
 100       result = NULL;
 101       buf[align + len] = seek_char;
 102     }
 103
 104   FOR_EACH_IMPL (impl, 0)
 105     do_one_test (impl, (CHAR *) (buf + align), seek_char, n, result);
 106 }
 107
 108 static void
 109 do_random_tests (void)
 110 {
 111   size_t i, j, n, align, pos, len;
 112   int seek_char;
 113   CHAR *result;
 114   UCHAR *p = (UCHAR *) (buf1 + page_size) - 512;
 115
 116   for (n = 0; n < ITERATIONS; n++)
 117     {
 118       align = random () & 15;
 119       pos = random () & 511;
 120       if (pos + align >= 512)
 121         pos = 511 - align - (random () & 7);
 122       len = random () & 511;
 123       if (pos >= len)
 124         len = pos + (random () & 7);
 125       if (len + align >= 512)
 126         len = 512 - align - (random () & 7);
 127       seek_char = random () & BIG_CHAR;
 128       j = len + align + 64;
 129       if (j > 512)
 130         j = 512;
 131
 132       for (i = 0; i < j; i++)
 133         {
 134           if (i == pos + align)
 135             p[i] = seek_char;
 136           else
 137             {
 138               p[i] = random () & BIG_CHAR;
 139               if (i < pos + align && p[i] == seek_char)
 140                 p[i] = seek_char + 13;
 141             }
 142         }
 143
 144       if (pos < len)
 145         {
 146           size_t r = random ();
 147           if ((r & 31) == 0)
 148             len = ~(uintptr_t) (p + align) - ((r >> 5) & 31);
 149           result = (CHAR *) (p + pos + align);
 150         }
 151       else
 152         result = NULL;
 153
 154       FOR_EACH_IMPL (impl, 1)
 155         if (CALL (impl, (CHAR *) (p + align), seek_char, len) != result)
 156           {
 157             error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %d, %zd, %zd) %p != %p, p %p",
 158                    n, impl->name, align, seek_char, len, pos,
 159                    CALL (impl, (CHAR *) (p + align), seek_char, len),
 160                    result, p);
 161             ret = 1;
 162           }
 163     }
 164 }
 165
 166 int
 167 test_main (void)
 168 {
 169   size_t i, j;
 170
 171   test_init ();
 172
 173   printf ("%20s", "");
 174   FOR_EACH_IMPL (impl, 0)
 175     printf ("\t%s", impl->name);
 176   putchar ('\n');
 177
 178   for (i = 1; i < 8; ++i)
 179     {
 180       do_test (0, 16 << i, 2048, 2048, 23);
 181       do_test (i, 64, 256, 256, 23);
 182       do_test (0, 16 << i, 2048, 2048, 0);
 183       do_test (i, 64, 256, 256, 0);
 184
 185       /* Check for large input sizes and for these cases we need to
 186          make sure the byte is within the size range (that's why
 187          7 << i must be smaller than 2048).  */
 188       do_test (0, 7 << i, 2048, SIZE_MAX, 23);
 189       do_test (0, 2048 - i, 2048, SIZE_MAX, 23);
 190       do_test (i, 64, 256, SIZE_MAX, 23);
 191       do_test (0, 7 << i, 2048, SIZE_MAX, 0);
 192       do_test (0, 2048 - i, 2048, SIZE_MAX, 0);
 193       do_test (i, 64, 256, SIZE_MAX, 0);
 194     }
 195
 196   for (i = 1; i < 64; ++i)
 197     {
 198       for (j = 1; j < 64; j++)
 199         {
 200           do_test (0, 64 - j, 64, SIZE_MAX, 23);
 201           do_test (i, 64 - j, 64, SIZE_MAX, 23);
 202         }
 203     }
 204
 205   for (i = 1; i < 32; ++i)
 206     {
 207       do_test (0, i, i + 1, i + 1, 23);
 208       do_test (0, i, i + 1, i + 1, 0);
 209     }
 210
 211   do_random_tests ();
 212   return ret;
 213 }
 214
 215 #include "../test-skeleton.c"