text: /*****************************************************************************\
  
    fat.h - FAT12/FAT16 file system
   
    (c) 2004 Copyright HP Development Company, LP
  
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.
  
    This program 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 General Public License for more details.
  
    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USALP
  
  \*****************************************************************************/
  #ifndef _FAT_H
  #define _FAT_H
  
  #define FAT_HARDSECT 512  /* sector size in bytes */
  
  /* Block size is set to the lowest common denominator. The ps325 reads 3 sectors max per command (LP?). While the ps130, ps 245,
   * and ?? can do 8 sector reads.
   */
  #define FAT_BLKSIZE 3    /* block size in sectors */
  
  typedef struct
  {
     char Name[16];
     char Attr;
     int Size;
  } FILE_ATTRIBUTES;
  
  typedef struct
  {
     char OEMID[8];                  
     int BytesPerSector;         
     int SectorsPerCluster;       
     int ReservedSectors;        
     int RootEntries;         
     int SectorsPerFat;         
     char VolumeLabel[11]; 
     char SystemID[8];     
     int WriteProtect;
  } PHOTO_CARD_ATTRIBUTES;
  
  /* APIs */
  int FatInit(void);
  int FatListDir(void);
  int FatReadFile(char *name, int fd);
  int FatReadFileExt(char *name, int offset, int len, void *outbuf);
  int FatSetCWD(char *dir);
  int FatDeleteFile(char *name); 
  int FatFreeSpace(void);
  int FatDirBegin(FILE_ATTRIBUTES * a);
  int FatDirNext(FILE_ATTRIBUTES * a);
  int FatDiskAttributes(PHOTO_CARD_ATTRIBUTES * pa);
  
  /* System dependent external functions */
  extern int ReadSector(int sector, int nsector, void *buf, int size);
  extern int WriteSector(int sector, int nsector, void *buf, int size);
  
  extern int verbose;
  
  #if defined(WORDS_BIGENDIAN)
  #define h2lits(A) ((((uint16_t)(A) & 0xff00) >> 8) | (((uint16_t)(A) & 0x00ff) << 8))    /* host to little-endian 16-bit value */
  #define lit2hs h2lits                         /* little-endian to host 16-bit value */
  
  #else
  #define h2lits(A) (A)
  #define lit2hs(A) (A)
  #endif
  
  #endif // _FAT_H
  