rbutil/sansapatcher/sansaio.h

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2006-2007 Dave Chapman
  11  *
  12  * All files in this archive are subject to the GNU General Public License.
  13  * See the file COPYING in the source tree root for full license agreement.
  14  *
  15  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  16  * KIND, either express or implied.
  17  *
  18  ****************************************************************************/
  19
  20 #ifndef __SANSAIO_H
  21 #define __SANSAIO_H
  22
  23 #include <stdint.h>
  24 #include <unistd.h>
  25
  26 #ifdef __WIN32__
  27 #include <windows.h>
  28 #define loff_t int64_t
  29 #else
  30 #define HANDLE int
  31 #define O_BINARY 0
  32
  33 /* Only Linux seems to need lseek64 and loff_t */
  34 #if !defined(linux) && !defined (__linux)
  35 #define loff_t off_t
  36 #define lseek64 lseek
  37 #endif
  38
  39 #endif
  40
  41 struct sansa_partinfo_t {
  42     unsigned long start; /* first sector (LBA) */
  43     unsigned long size;  /* number of sectors */
  44     int type;
  45 };
  46
  47 struct mi4header_t {
  48     uint32_t version;
  49     uint32_t length;
  50     uint32_t crc32;
  51     uint32_t enctype;
  52     uint32_t mi4size;
  53     uint32_t plaintext;
  54 };
  55
  56 struct sansa_t {
  57     HANDLE dh;
  58     char diskname[4096];
  59     int sector_size;
  60     struct sansa_partinfo_t pinfo[4];
  61     int hasoldbootloader;
  62     char* targetname; /* "e200" or "c200" */
  63     loff_t start;  /* Offset in bytes of firmware partition from start of disk */
  64 };
  65
  66 void print_error(char* msg);
  67 int sansa_open(struct sansa_t* sansa, int silent);
  68 int sansa_reopen_rw(struct sansa_t* sansa);
  69 int sansa_close(struct sansa_t* sansa);
  70 int sansa_seek(struct sansa_t* sansa, loff_t pos);
  71 int sansa_read(struct sansa_t* sansa, unsigned char* buf, int nbytes);
  72 int sansa_write(struct sansa_t* sansa, unsigned char* buf, int nbytes);
  73 int sansa_alloc_buffer(unsigned char** sectorbuf, int bufsize);
  74
  75 #endif