string/test-memmove.c

   1 /* Test and measure memmove functions.
   2    Copyright (C) 1999, 2002, 2003 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 __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, dst, src, len);
  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 align1, size_t align2, size_t len)
  92 {
  93   size_t i, j;
  94   char *s1, *s2;
  95
  96   align1 &= 63;
  97   if (align1 + len >= page_size)
  98     return;
  99
 100   align2 &= 63;
 101   if (align2 + len >= page_size)
 102     return;
 103
 104   s1 = buf1 + align1;
 105   s2 = buf2 + align2;
 106
 107   for (i = 0, j = 1; i < len; i++, j += 23)
 108     s1[i] = j;
 109
 110   if (HP_TIMING_AVAIL)
 111     printf ("Length %4zd, alignment %2zd/%2zd:", len, align1, align2);
 112
 113   FOR_EACH_IMPL (impl, 0)
 114     do_one_test (impl, s2, buf2 + align1, s1, 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, n, align1, align2, len, size;
 124   size_t srcstart, srcend, dststart, dstend;
 125   int c;
 126   unsigned char *p1, *p2;
 127   unsigned char *res;
 128
 129   for (n = 0; n < ITERATIONS; n++)
 130     {
 131       if ((random () & 255) == 0)
 132         size = 65536;
 133       else
 134         size = 512;
 135       if (size > page_size)
 136         size = page_size;
 137       if ((random () & 3) == 0)
 138         {
 139           len = random () & (size - 1);
 140           align1 = size - len - (random () & 31);
 141           align2 = size - len - (random () & 31);
 142           if (align1 > size)
 143             align1 = 0;
 144           if (align2 > size)
 145             align2 = 0;
 146         }
 147       else
 148         {
 149           align1 = random () & (size / 2 - 1);
 150           align2 = random () & (size / 2 - 1);
 151           len = random () & (size - 1);
 152           if (align1 + len > size)
 153             align1 = size - len;
 154           if (align2 + len > size)
 155             align2 = size - len;
 156         }
 157
 158       p1 = buf1 + page_size - size;
 159       p2 = buf2 + page_size - size;
 160       c = random () & 255;
 161       srcend = align1 + len + 256;
 162       if (srcend > size)
 163         srcend = size;
 164       if (align1 > 256)
 165         srcstart = align1 - 256;
 166       else
 167         srcstart = 0;
 168       for (i = srcstart; i < srcend; ++i)
 169         p1[i] = random () & 255;
 170       dstend = align2 + len + 256;
 171       if (dstend > size)
 172         dstend = size;
 173       if (align2 > 256)
 174         dststart = align2 - 256;
 175       else
 176         dststart = 0;
 177
 178       FOR_EACH_IMPL (impl, 1)
 179         {
 180           memset (p2 + dststart, c, dstend - dststart);
 181           memcpy (p2 + srcstart, p1 + srcstart, srcend - srcstart);
 182           res = CALL (impl, p2 + align2, p2 + align1, len);
 183           if (res != p2 + align2)
 184             {
 185               error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %zd, %zd) %p != %p",
 186                      n, impl->name, align1, align2, len, res, p2 + align2);
 187               ret = 1;
 188             }
 189           if (memcmp (p1 + align1, p2 + align2, len))
 190             {
 191               error (0, 0, "Iteration %zd - different strings, %s (%zd, %zd, %zd)",
 192                      n, impl->name, align1, align2, len);
 193               ret = 1;
 194             }
 195           for (i = dststart; i < dstend; ++i)
 196             {
 197               if (i >= align2 && i < align2 + len)
 198                 {
 199                   i = align2 + len - 1;
 200                   continue;
 201                 }
 202               if (i >= srcstart && i < srcend)
 203                 {
 204                   i = srcend - 1;
 205                   continue;
 206                 }
 207               if (p2[i] != c)
 208                 {
 209                   error (0, 0, "Iteration %zd - garbage in memset area, %s (%zd, %zd, %zd)",
 210                          n, impl->name, align1, align2, len);
 211                   ret = 1;
 212                   break;
 213                 }
 214             }
 215
 216           if (srcstart < align2
 217               && memcmp (p2 + srcstart, p1 + srcstart,
 218                          (srcend > align2 ? align2 : srcend) - srcstart))
 219             {
 220               error (0, 0, "Iteration %zd - garbage before dst, %s (%zd, %zd, %zd)",
 221                      n, impl->name, align1, align2, len);
 222               ret = 1;
 223               break;
 224             }
 225
 226           i = srcstart > align2 + len ? srcstart : align2 + len;
 227           if (srcend > align2 + len
 228               && memcmp (p2 + i, p1 + i, srcend - i))
 229             {
 230               error (0, 0, "Iteration %zd - garbage after dst, %s (%zd, %zd, %zd)",
 231                      n, impl->name, align1, align2, len);
 232               ret = 1;
 233               break;
 234             }
 235         }
 236     }
 237 }
 238
 239 int
 240 test_main (void)
 241 {
 242   size_t i;
 243
 244   test_init ();
 245
 246   printf ("%23s", "");
 247   FOR_EACH_IMPL (impl, 0)
 248     printf ("\t%s", impl->name);
 249   putchar ('\n');
 250
 251   for (i = 0; i < 14; ++i)
 252     {
 253       do_test (0, 32, 1 << i);
 254       do_test (32, 0, 1 << i);
 255       do_test (0, i, 1 << i);
 256       do_test (i, 0, 1 << i);
 257     }
 258
 259   for (i = 0; i < 32; ++i)
 260     {
 261       do_test (0, 32, i);
 262       do_test (32, 0, i);
 263       do_test (0, i, i);
 264       do_test (i, 0, i);
 265     }
 266
 267   for (i = 3; i < 32; ++i)
 268     {
 269       if ((i & (i - 1)) == 0)
 270         continue;
 271       do_test (0, 32, 16 * i);
 272       do_test (32, 0, 16 * i);
 273       do_test (0, i, 16 * i);
 274       do_test (i, 0, 16 * i);
 275     }
 276
 277   do_random_tests ();
 278   return ret;
 279 }
 280
 281 #include "../test-skeleton.c"