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 *   Copyright (C) 2005, 2006 by Dmitry Morozhnikov                        *
 *                   dmiceman@mail.ru                                            *
 *             (C) 2008, 2009 by Malakhov Alexey                           *
 *             brezerk@gmail.com                                           *
 *                                                                         *
 *   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 3 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        *
 *   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, see <http://www.gnu.org/licenses/>. *
 *                                                                         *

#ifndef _ISOFS_H
#define _ISOFS_H

#include <sys/stat.h>
#include "linux/iso_fs.h"
#include "linux/rock.h"

typedef int (*isofs_dir_fill_t) (void *buf, const char *name,
      const struct stat *stat, off_t off);

typedef struct _isofs_context {
      char *imagefile;
      int fd;
      int pd_have_rr; // 1 if primary descriptor have hierarchy with rrip extension
      struct iso_primary_descriptor pd;
      int supplementary; // 1 if supplementary descriptor found and in effect
      struct iso_supplementary_descriptor sd;
      struct iso_directory_record *root;
      int file_offset; // offset to begin of useful data (for .nrg files)
      int id_offset; // offset to CD001 inside file
      off_t block_size; // raw block size
      off_t block_offset; // offset from block start to data
      off_t data_size; // data size inside block
      int susp; // parse susp entries
      int susp_skip; // skip bytes from susp SP entry
      int joliet_level; // joliet extension level (1, 2 or 3)
      ino_t last_ino;
} isofs_context;

typedef struct _isofs_inode {
      struct iso_directory_record *record;
      struct stat st;
      ino_t st_ino;
      time_t ctime; // cached value from record->date
      char *sl;
      size_t sl_len;
      char *nm;
      size_t nm_len;
      int cl_block;
      int pl_block;
      size_t zf_size;
      size_t real_size;
      char zf_algorithm[2];
      size_t zf_header_size;
      int zf_block_shift;
      int zf_nblocks;
      int *zf_blockptr;
      int PX; // 1 if PX entry found, st in effect
      int SL; // 1 if SL entry found, sl in effect
      int NM; // 1 if NM entry found, nm in effect
      int CL; // 1 if CL found, cl_block in effect
      int PL; // 1 if PL found, pl_block in effect
      int RE;
      int TF; // 1 if TF entry found, st in effect
      int ZF; // 1 if ZF entry found
} isofs_inode;

// borrowed from zisofs-tools
typedef struct _zf_file_header {
  char magic[8];
  char uncompressed_len[4];
  unsigned char header_size;
  unsigned char block_size;
  char reserved[2];
} zf_file_header;

// macros for iso_directory_record->flags
#define ISO_FLAGS_HIDDEN(x) (*((unsigned char *) x) & 1)
#define ISO_FLAGS_DIR(x) (*((unsigned char *) x) & (1 << 1))

// borrowed from linux kernel rock ridge code

#define SIG(A,B) ((A) | ((B) << 8)) /* isonum_721() */

// borrowed from linux kernel isofs code

/* Number conversion inlines, named after the section in ISO 9660
   they correspond to. */

#include <byteswap.h>

static inline int isonum_711(unsigned char *p)
      return *(unsigned char *)p;
// static inline int isonum_712(char *p)
// {
//     return *(s8 *)p;
// }
static inline unsigned int isonum_721(char *p)
#if defined(WORDS_BIGENDIAN)
      return *(unsigned short *)p;
      return bswap_16(*(unsigned short *)p);
// static inline unsigned int isonum_722(char *p)
// {
//     return be16_to_cpu(get_unaligned((__le16 *)p));
// }
static inline unsigned int isonum_723(char *p)
      /* Ignore bigendian datum due to broken mastering programs */
#if defined(WORDS_BIGENDIAN)
      return bswap_16(*(unsigned short *)p);
      return *(unsigned short *)p;
static inline unsigned int isonum_731(char *p)
#if defined(WORDS_BIGENDIAN)
      return bswap_32(*(unsigned int *)p);
      return *(unsigned int *)p;
// static inline unsigned int isonum_732(char *p)
// {
//     return be32_to_cpu(get_unaligned((__le32 *)p));
// }
static inline unsigned int isonum_733(char *p)
      /* Ignore bigendian datum due to broken mastering programs */
#if defined(WORDS_BIGENDIAN)
      return bswap_32(*(unsigned int *)p);
      return *(unsigned int *)p;

int isofs_real_preinit(char* imagefile, int fd);
void* isofs_real_init();

int isofs_real_opendir(const char *path);
int isofs_real_readdir(const char *path, void *filler_buf, isofs_dir_fill_t filler);
int isofs_real_getattr(const char *path, struct stat *stbuf);
int isofs_real_readlink(const char *path, char *target, size_t size);
int isofs_real_open(const char *path);
int isofs_real_read(const char *path, char *out_buf, size_t size, off_t offset);
int isofs_real_statfs(struct statfs *stbuf);

#endif // _ISOFS_H

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