string/test-memmove.c

   1 /* Test and measure memmove functions.
   2    Copyright (C) 1999, 2002 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, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 #define TEST_MAIN
  22 #include "test-string.h"
  23
  24 typedef char *(*proto_t) (char *, const char *, size_t);
  25 char *simple_memmove (char *, const char *, size_t);
  26
  27 IMPL (simple_memmove, 0)
  28 IMPL (memmove, 1)
  29
  30 char *
  31 simple_memmove (char *dst, const char *src, size_t n)
  32 {
  33   char *ret = dst;
  34   if (src < dst)
  35     {
  36       dst += n;
  37       src += n;
  38       while (n--)
  39         *--dst = *--src;
  40     }
  41   else
  42     while (n--)
  43       *dst++ = *src++;
  44   return ret;
  45 }
  46
  47 static void
  48 do_one_test (impl_t *impl, char *dst, char *src, const char *orig_src,
  49              size_t len)
  50 {
  51   char *res;
  52
  53   memcpy (src, orig_src, len);
  54   res = CALL (impl, dst, src, len);
  55   if (res != dst)
  56     {
  57       error (0, 0, "Wrong result in function %s %p %p", impl->name,
  58              res, dst);
  59       ret = 1;
  60       return;
  61     }
  62
  63   if (memcmp (dst, orig_src, len) != 0)
  64     {
  65       error (0, 0, "Wrong result in function %s dst \"%s\" src \"%s\"",
  66              impl->name, dst, src);
  67       ret = 1;
  68       return;
  69     }
  70
  71   if (HP_TIMING_AVAIL)
  72     {
  73       hp_timing_t start, stop, best_time = ~ (hp_timing_t) 0;
  74       size_t i;
  75
  76       for (i = 0; i < 32; ++i)
  77         {
  78           HP_TIMING_NOW (start);
  79           CALL (impl, dst, src, len);
  80           HP_TIMING_NOW (stop);
  81           HP_TIMING_BEST (best_time, start, stop);
  82         }
  83
  84       printf ("\t%zd", (size_t) best_time);
  85     }
  86 }
  87
  88 static void
  89 do_test (size_t align1, size_t align2, size_t len)
  90 {
  91   size_t i, j;
  92   char *s1, *s2;
  93
  94   align1 &= 63;
  95   if (align1 + len >= page_size)
  96     return;
  97
  98   align2 &= 63;
  99   if (align2 + len >= page_size)
 100     return;
 101
 102   s1 = buf1 + align1;
 103   s2 = buf2 + align2;
 104
 105   for (i = 0, j = 1; i < len; i++, j += 23)
 106     s1[i] = j;
 107
 108   if (HP_TIMING_AVAIL)
 109     printf ("Length %4zd, alignment %2zd/%2zd:", len, align1, align2);
 110
 111   FOR_EACH_IMPL (impl, 0)
 112     do_one_test (impl, s2, buf2 + align1, s1, len);
 113
 114   if (HP_TIMING_AVAIL)
 115     putchar ('\n');
 116 }
 117
 118 static void
 119 do_random_tests (void)
 120 {
 121   size_t i, n, align1, align2, len, size;
 122   size_t srcstart, srcend, dststart, dstend;
 123   int c;
 124   unsigned char *p1, *p2;
 125   unsigned char *res;
 126
 127   for (n = 0; n < ITERATIONS; n++)
 128     {
 129       if ((random () & 255) == 0)
 130         size = 65536;
 131       else
 132         size = 512;
 133       if (size > page_size)
 134         size = page_size;
 135       if ((random () & 3) == 0)
 136         {
 137           len = random () & (size - 1);
 138           align1 = size - len - (random () & 31);
 139           align2 = size - len - (random () & 31);
 140           if (align1 > size)
 141             align1 = 0;
 142           if (align2 > size)
 143             align2 = 0;
 144         }
 145       else
 146         {
 147           align1 = random () & (size / 2 - 1);
 148           align2 = random () & (size / 2 - 1);
 149           len = random () & (size - 1);
 150           if (align1 + len > size)
 151             align1 = size - len;
 152           if (align2 + len > size)
 153             align2 = size - len;
 154         }
 155
 156       p1 = buf1 + page_size - size;
 157       p2 = buf2 + page_size - size;
 158       c = random () & 255;
 159       srcend = align1 + len + 256;
 160       if (srcend > size)
 161         srcend = size;
 162       if (align1 > 256)
 163         srcstart = align1 - 256;
 164       else
 165         srcstart = 0;
 166       for (i = srcstart; i < srcend; ++i)
 167         p1[i] = random () & 255;
 168       dstend = align2 + len + 256;
 169       if (dstend > size)
 170         dstend = size;
 171       if (align2 > 256)
 172         dststart = align2 - 256;
 173       else
 174         dststart = 0;
 175
 176       FOR_EACH_IMPL (impl, 1)
 177         {
 178           memset (p2 + dststart, c, dstend - dststart);
 179           memcpy (p2 + srcstart, p1 + srcstart, srcend - srcstart);
 180           res = CALL (impl, p2 + align2, p2 + align1, len);
 181           if (res != p2 + align2)
 182             {
 183               error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %zd, %zd) %p != %p",
 184                      n, impl->name, align1, align2, len, res, p2 + align2);
 185               ret = 1;
 186             }
 187           if (memcmp (p1 + align1, p2 + align2, len))
 188             {
 189               error (0, 0, "Iteration %zd - different strings, %s (%zd, %zd, %zd)",
 190                      n, impl->name, align1, align2, len);
 191               ret = 1;
 192             }
 193           for (i = dststart; i < dstend; ++i)
 194             {
 195               if (i >= align2 && i < align2 + len)
 196                 {
 197                   i = align2 + len - 1;
 198                   continue;
 199                 }
 200               if (i >= srcstart && i < srcend)
 201                 {
 202                   i = srcend - 1;
 203                   continue;
 204                 }
 205               if (p2[i] != c)
 206                 {
 207                   error (0, 0, "Iteration %zd - garbage in memset area, %s (%zd, %zd, %zd)",
 208                          n, impl->name, align1, align2, len);
 209                   ret = 1;
 210                   break;
 211                 }
 212             }
 213
 214           if (srcstart < align2
 215               && memcmp (p2 + srcstart, p1 + srcstart,
 216                          (srcend > align2 ? align2 : srcend) - srcstart))
 217             {
 218               error (0, 0, "Iteration %zd - garbage before dst, %s (%zd, %zd, %zd)",
 219                      n, impl->name, align1, align2, len);
 220               ret = 1;
 221               break;
 222             }
 223
 224           i = srcstart > align2 + len ? srcstart : align2 + len;
 225           if (srcend > align2 + len
 226               && memcmp (p2 + i, p1 + i, srcend - i))
 227             {
 228               error (0, 0, "Iteration %zd - garbage after dst, %s (%zd, %zd, %zd)",
 229                      n, impl->name, align1, align2, len);
 230               ret = 1;
 231               break;
 232             }
 233         }
 234     }
 235 }
 236
 237 int
 238 test_main (void)
 239 {
 240   size_t i;
 241
 242   test_init ();
 243
 244   printf ("%23s", "");
 245   FOR_EACH_IMPL (impl, 0)
 246     printf ("\t%s", impl->name);
 247   putchar ('\n');
 248
 249   for (i = 0; i < 14; ++i)
 250     {
 251       do_test (0, 32, 1 << i);
 252       do_test (32, 0, 1 << i);
 253       do_test (0, i, 1 << i);
 254       do_test (i, 0, 1 << i);
 255     }
 256
 257   for (i = 0; i < 32; ++i)
 258     {
 259       do_test (0, 32, i);
 260       do_test (32, 0, i);
 261       do_test (0, i, i);
 262       do_test (i, 0, i);
 263     }
 264
 265   for (i = 3; i < 32; ++i)
 266     {
 267       if ((i & (i - 1)) == 0)
 268         continue;
 269       do_test (0, 32, 16 * i);
 270       do_test (32, 0, 16 * i);
 271       do_test (0, i, 16 * i);
 272       do_test (i, 0, 16 * i);
 273     }
 274
 275   do_random_tests ();
 276   return ret;
 277 }
 278
 279 #include "../test-skeleton.c"