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/* Copyright (C) 1990, 1991, 1992 Free Software Foundation, Inc.

   Contributed by Torbjorn Granlund (tege@sics.se).

This file is part of the GNU C Library.

The GNU C Library is free software; you can redistribute it and/or

modify it under the terms of the GNU Library General Public License as

published by the Free Software Foundation; either version 2 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

Library General Public License for more details.

You should have received a copy of the GNU Library General Public

License along with the GNU C Library; see the file COPYING.LIB.  If

not, write to the Free Software Foundation, Inc., 675 Mass Ave,

Cambridge, MA 02139, USA.  */

#include <stdlib.h>

#include <stdio.h>

#include <string.h>

#include <malloc.h>

int main(int argc, char **argv)

{

  char *mem, *memp;

  char *rand_mem;

  char *lo_around, *hi_around;

  int size, max_size;

  int src_off, dst_off;

  int i;

  int space_around = 10;

  max_size = 256;

  mem = malloc (max_size + 2 * max_size + 2 * space_around);

  rand_mem = malloc (max_size);

  lo_around = malloc (space_around);

  hi_around = malloc (space_around);

  memp = mem + space_around;

  /* Fill RAND_MEM with random bytes, each non-zero.  */

  for (i = 0; i < max_size; i++)

    {

      int x;

      do

        x = rand ();

      while (x == 0);

      rand_mem[i] = x;

    }

  for (size = 0; size < max_size; size++)

    {

      printf("phase %d\n", size);

      for (src_off = 0; src_off <= 16; src_off++)

        {

          for (dst_off = 0; dst_off <= 16; dst_off++)

            {

              /* Put zero around the intended destination, to check

                 that it's not clobbered.  */

              for (i = 1; i < space_around; i++)

                {

                  memp[dst_off - i] = 0;

                  memp[dst_off + size - 1 + i] = 0;

                }

              /* Fill the source area with known contents.  */

              for (i = 0; i < size; i++)

                memp[src_off + i] = rand_mem[i];

              /* Remember the contents around the destination area.

                 (It might not be what we wrote some lines above, since

                 the src area and the dst area overlap.)  */

              for (i = 1; i < space_around; i++)

                {

                  lo_around[i] = memp[dst_off - i];

                  hi_around[i] = memp[dst_off + size - 1 + i];

                }

              memmove (memp + dst_off, memp + src_off, size);

              /* Check that the destination area has the same

                 contents we wrote to the source area.  */

              for (i = 0; i < size; i++)

                {

                  if (memp[dst_off + i] != rand_mem[i])

                    abort ();

                }

              /* Check that the area around the destination is not

                 clobbered.  */

              for (i = 1; i < space_around; i++)

                {

                  if (memp[dst_off - i] != lo_around[i])

                    abort ();

                  if (memp[dst_off + size - 1 + i] != hi_around[i])

                    abort ();

                }

            }

        }

    }

  puts ("Test succeeded.");

  return 0;

}