disabled/gpxe/wrap/wrap.c

   1 /*
   2  * Copyright © 2009 Vladimir 'phcoder' Serbinenko <phcoder@gmail.com>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  *
   9  *   Redistributions of source code must retain the above copyright
  10  *   notice, this list of conditions and the following disclaimer.
  11  *
  12  *   Redistributions in binary form must reproduce the above copyright
  13  *   notice, this list of conditions and the following disclaimer in
  14  *   the documentation and/or other materials provided with the
  15  *   distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  18  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  19  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  20  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  21  * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
  22  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  23  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  24  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  26  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  27  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  28  * OF THE POSSIBILITY OF SUCH DAMAGE.
  29  */
  30
  31 FILE_LICENCE ( BSD2 );
  32
  33 #include <gpxe/wrap.h>
  34 #include <gpxe/uaccess.h>
  35
  36 void
  37 memcpy_user (userptr_t dest, off_t dest_off,
  38              userptr_t src, off_t src_off, size_t len )
  39 {
  40   grub_memcpy ((void *) dest+dest_off, (void *) src+src_off, len);
  41 }
  42
  43 userptr_t
  44 virt_to_user (volatile const void *in)
  45 {
  46   return in;
  47 }
  48
  49 void
  50 free_memblock (void *ptr, size_t size __attribute__ ((unused)))
  51 {
  52   grub_free (ptr);
  53 }
  54
  55 void *
  56 memchr (void *s, grub_uint8_t c, grub_size_t size)
  57 {
  58   for (;size && *(grub_uint8_t *)s != c; size--, s = (grub_uint8_t *)s + 1);
  59   if (size)
  60     return s;
  61   return NULL;
  62 }
  63
  64 grub_size_t
  65 strnlen (char *str, grub_size_t n)
  66 {
  67   grub_size_t r = 0;
  68   while (*str && n)
  69     {
  70       str++;
  71       n--;
  72       r++;
  73     }
  74   return r;
  75 }