pkgbuilds/wiifuse/src/wiifuse-0.2.0/global.c

   1 /*
   2  *  Copyright (C) 2008 dhewg, #wiidev efnet
   3  *
   4  *  some functions are taken from
   5  *  http://git.infradead.org/?p=users/segher/wii.git
   6  *  Copyright 2007,2008  Segher Boessenkool  <segher@kernel.crashing.org>
   7  *  21:14:49 <@segher> i'll happily grant you to license the whole as v3, btw
   8  *
   9  *  this file is part of wiifuse
  10  *  http://wiibrew.org/index.php?title=Wiifuse
  11  *
  12  *  This program is free software; you can redistribute it and/or modify
  13  *  it under the terms of the GNU General Public License as published by
  14  *  the Free Software Foundation; either version 2 of the License, or
  15  *  (at your option) any later version.
  16  *
  17  *  This program is distributed in the hope that it will be useful,
  18  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  *  GNU General Public License for more details.
  21  *
  22  *  You should have received a copy of the GNU General Public License
  23  *  along with this program; if not, write to the Free Software
  24  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  25  */
  26
  27 #include "global.h"
  28
  29 u8 verbose_level = 0;
  30
  31 u16 get_be16 (const u8 *p) {
  32         return (p[0] << 8) | p[1];
  33 }
  34
  35 u32 get_be32 (const u8 *p) {
  36         return (p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3];
  37 }
  38
  39 u64 get_be64 (const u8 *p) {
  40         return ((u64) get_be32 (p) << 32) | get_be32 (p + 4);
  41 }
  42
  43 void put_be16 (u8 *p, const u16 value) {
  44         p[0] = (value >> 8) & 0xff;
  45         p[1] = value & 0xff;
  46 }
  47
  48 void put_be32 (u8 *p, const u32 value) {
  49         p[0] = (value >> 24) & 0xff;
  50         p[1] = (value >> 16) & 0xff;
  51         p[2] = (value >> 8) & 0xff;
  52         p[3] = value & 0xff;
  53 }
  54
  55 void put_be64 (u8 *p, const u64 value) {
  56         put_be32 (p, (value >> 32) & 0xffffffff);
  57         put_be32 (p + 4, value & 0xffffffff);
  58 }
  59
  60 size_t g_strnlen (const char *s, size_t size) {
  61         size_t i;
  62
  63         for (i = 0; i < size; ++i)
  64                 if (s[i] == 0)
  65                         return i;
  66
  67         return size;
  68 }
  69
  70 u32 get_dol_size (const u8 *header) {
  71         u8 i;
  72         u32 offset, size;
  73         u32 max = 0;
  74
  75         // iterate through the 7 code segments
  76         for (i = 0; i < 7; ++i) {
  77                 offset = get_be32 (&header[i * 4]);
  78                 size = get_be32 (&header[0x90 + i * 4]);
  79                 if (offset + size > max)
  80                         max = offset + size;
  81         }
  82
  83         // iterate through the 11 data segments
  84         for (i = 0; i < 11; ++i) {
  85                 offset = get_be32 (&header[0x1c + i * 4]);
  86                 size = get_be32 (&header[0xac + i * 4]);
  87                 if (offset + size > max)
  88                         max = offset + size;
  89         }
  90
  91         return max;
  92 }
  93