source: branches/libc-0.6/src/libctests/glibc/string/test-memmove.c

/* Test and measure memmove functions.
   Copyright (C) 1999, 2002, 2003 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Written by Jakub Jelinek <jakub@redhat.com>, 1999.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#define TEST_MAIN
#include "test-string.h"

typedef char *(*proto_t) (char *, const char *, size_t);
char *simple_memmove (char *, const char *, size_t);

IMPL (simple_memmove, 0)
IMPL (memmove, 1)

char *
simple_memmove (char *dst, const char *src, size_t n)
{
  char *ret = dst;
  if (src < dst)
    {
      dst += n;
      src += n;
      while (n--)
        *--dst = *--src;
    }
  else
    while (n--)
      *dst++ = *src++;
  return ret;
}

static void
do_one_test (impl_t *impl, char *dst, char *src, const char *orig_src,
             size_t len)
{
  char *res;

  memcpy (src, orig_src, len);
  res = CALL (impl, dst, src, len);
  if (res != dst)
    {
      error (0, 0, "Wrong result in function %s %p %p", impl->name,
             res, dst);
      ret = 1;
      return;
    }

  if (memcmp (dst, orig_src, len) != 0)
    {
      error (0, 0, "Wrong result in function %s dst \"%s\" src \"%s\"",
             impl->name, dst, src);
      ret = 1;
      return;
    }

  if (HP_TIMING_AVAIL)
    {
      hp_timing_t start __attribute ((unused));
      hp_timing_t stop __attribute ((unused));
      hp_timing_t best_time = ~ (hp_timing_t) 0;
      size_t i;

      for (i = 0; i < 32; ++i)
        {
          HP_TIMING_NOW (start);
          CALL (impl, dst, src, len);
          HP_TIMING_NOW (stop);
          HP_TIMING_BEST (best_time, start, stop);
        }

      printf ("\t%zd", (size_t) best_time);
    }
}

static void
do_test (size_t align1, size_t align2, size_t len)
{
  size_t i, j;
  char *s1, *s2;

  align1 &= 63;
  if (align1 + len >= page_size)
    return;

  align2 &= 63;
  if (align2 + len >= page_size)
    return;

  s1 = buf1 + align1;
  s2 = buf2 + align2;

  for (i = 0, j = 1; i < len; i++, j += 23)
    s1[i] = j;

  if (HP_TIMING_AVAIL)
    printf ("Length %4zd, alignment %2zd/%2zd:", len, align1, align2);

  FOR_EACH_IMPL (impl, 0)
    do_one_test (impl, s2, buf2 + align1, s1, len);

  if (HP_TIMING_AVAIL)
    putchar ('\n');
}

static void
do_random_tests (void)
{
  size_t i, n, align1, align2, len, size;
  size_t srcstart, srcend, dststart, dstend;
  int c;
  unsigned char *p1, *p2;
  unsigned char *res;

  for (n = 0; n < ITERATIONS; n++)
    {
      if ((random () & 255) == 0)
        size = 65536;
      else
        size = 512;
      if (size > page_size)
        size = page_size;
      if ((random () & 3) == 0)
        {
          len = random () & (size - 1);
          align1 = size - len - (random () & 31);
          align2 = size - len - (random () & 31);
          if (align1 > size)
            align1 = 0;
          if (align2 > size)
            align2 = 0;
        }
      else
        {
          align1 = random () & (size / 2 - 1);
          align2 = random () & (size / 2 - 1);
          len = random () & (size - 1);
          if (align1 + len > size)
            align1 = size - len;
          if (align2 + len > size)
            align2 = size - len;
        }

      p1 = buf1 + page_size - size;
      p2 = buf2 + page_size - size;
      c = random () & 255;
      srcend = align1 + len + 256;
      if (srcend > size)
        srcend = size;
      if (align1 > 256)
        srcstart = align1 - 256;
      else
        srcstart = 0;
      for (i = srcstart; i < srcend; ++i)
        p1[i] = random () & 255;
      dstend = align2 + len + 256;
      if (dstend > size)
        dstend = size;
      if (align2 > 256)
        dststart = align2 - 256;
      else
        dststart = 0;

      FOR_EACH_IMPL (impl, 1)
        {
          memset (p2 + dststart, c, dstend - dststart);
          memcpy (p2 + srcstart, p1 + srcstart, srcend - srcstart);
          res = CALL (impl, p2 + align2, p2 + align1, len);
          if (res != p2 + align2)
            {
              error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %zd, %zd) %p != %p",
                     n, impl->name, align1, align2, len, res, p2 + align2);
              ret = 1;
            }
          if (memcmp (p1 + align1, p2 + align2, len))
            {
              error (0, 0, "Iteration %zd - different strings, %s (%zd, %zd, %zd)",
                     n, impl->name, align1, align2, len);
              ret = 1;
            }
          for (i = dststart; i < dstend; ++i)
            {
              if (i >= align2 && i < align2 + len)
                {
                  i = align2 + len - 1;
                  continue;
                }
              if (i >= srcstart && i < srcend)
                {
                  i = srcend - 1;
                  continue;
                }
              if (p2[i] != c)
                {
                  error (0, 0, "Iteration %zd - garbage in memset area, %s (%zd, %zd, %zd)",
                         n, impl->name, align1, align2, len);
                  ret = 1;
                  break;
                }
            }

          if (srcstart < align2
              && memcmp (p2 + srcstart, p1 + srcstart,
                         (srcend > align2 ? align2 : srcend) - srcstart))
            {
              error (0, 0, "Iteration %zd - garbage before dst, %s (%zd, %zd, %zd)",
                     n, impl->name, align1, align2, len);
              ret = 1;
              break;
            }

          i = srcstart > align2 + len ? srcstart : align2 + len;
          if (srcend > align2 + len
              && memcmp (p2 + i, p1 + i, srcend - i))
            {
              error (0, 0, "Iteration %zd - garbage after dst, %s (%zd, %zd, %zd)",
                     n, impl->name, align1, align2, len);
              ret = 1;
              break;
            }
        }
    }
}

int
test_main (void)
{
  size_t i;

  test_init ();

  printf ("%23s", "");
  FOR_EACH_IMPL (impl, 0)
    printf ("\t%s", impl->name);
  putchar ('\n');

  for (i = 0; i < 14; ++i)
    {
      do_test (0, 32, 1 << i);
      do_test (32, 0, 1 << i);
      do_test (0, i, 1 << i);
      do_test (i, 0, 1 << i);
    }

  for (i = 0; i < 32; ++i)
    {
      do_test (0, 32, i);
      do_test (32, 0, i);
      do_test (0, i, i);
      do_test (i, 0, i);
    }

  for (i = 3; i < 32; ++i)
    {
      if ((i & (i - 1)) == 0)
        continue;
      do_test (0, 32, 16 * i);
      do_test (32, 0, 16 * i);
      do_test (0, i, 16 * i);
      do_test (i, 0, 16 * i);
    }

  do_random_tests ();
  return ret;
}

#include "../test-skeleton.c"