arch/all-pc/boot/grub2-aros/grub-core/boot/decompressor/none.c

   1 /*
   2  *  GRUB  --  GRand Unified Bootloader
   3  *  Copyright (C) 2010  Free Software Foundation, Inc.
   4  *
   5  *  GRUB is free software: you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation, either version 3 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  GRUB is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #include <grub/decompressor.h>
  20
  21 void
  22 grub_decompress_core (void *src, void *dest, unsigned long n,
  23                       unsigned long dstsize __attribute__ ((unused)))
  24 {
  25   char *d = (char *) dest;
  26   const char *s = (const char *) src;
  27
  28   if (d == s)
  29     return;
  30
  31   if (d < s)
  32     while (n--)
  33       *d++ = *s++;
  34   else
  35     {
  36       d += n;
  37       s += n;
  38
  39       while (n--)
  40         *--d = *--s;
  41     }
  42 }