/* Copyright  (C) 2010-2019 The RetroArch team
*
* ---------------------------------------------------------------------------------------
* The following license statement only applies to this file (vfs_implementation.h).
* ---------------------------------------------------------------------------------------
*
* Permission is hereby granted, free of charge,
* to any person obtaining a copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/

#ifndef __LIBRETRO_SDK_VFS_H
#define __LIBRETRO_SDK_VFS_H

#include <retro_common_api.h>
#include <boolean.h>

#ifdef RARCH_INTERNAL
#ifndef VFS_FRONTEND
#define VFS_FRONTEND
#endif
#endif

RETRO_BEGIN_DECLS

#ifdef _WIN32
typedef void* HANDLE;
#endif

typedef struct
{
   char* cue_buf;
   size_t cue_len;
   size_t cue_pos;
   char drive;
} vfs_cdrom_t;

typedef struct
{
   int64_t byte_pos;
   unsigned cur_lba;
   unsigned char cur_track;
   unsigned char cur_min;
   unsigned char cur_sec;
   unsigned char cur_frame;

   unsigned sector_size;
   unsigned char sector_header_size;
   unsigned char mode;

   unsigned last_frame_lba;
   unsigned char last_frame[2352];
} vfs_cdrom_track_t;

enum vfs_scheme
{
   VFS_SCHEME_NONE = 0,
   VFS_SCHEME_CDROM,
   VFS_SCHEME_CDROM_TRACK,
   VFS_SCHEME_CDROM_FILE,
   VFS_SCHEME_CUE,
   VFS_SCHEME_CUE_BIN,
   VFS_SCHEME_CUE_BIN_FILE
};

#ifndef __WINRT__
#ifdef VFS_FRONTEND
struct retro_vfs_file_handle
#else
struct libretro_vfs_implementation_file
#endif
{
   int fd;
   unsigned hints;
   int64_t size;
   char *buf;
   FILE *fp;
#ifdef _WIN32
   HANDLE fh;
#endif
   char* orig_path;
   uint64_t mappos;
   uint64_t mapsize;
   uint8_t *mapped;

#ifdef VFS_FRONTEND
   struct retro_vfs_file_handle* parent;
#else
   struct libretro_vfs_implementation_file* parent;
#endif
   uint64_t parent_offset;

   enum vfs_scheme scheme;

   vfs_cdrom_t cdrom;
   vfs_cdrom_track_t* track;
};
#endif

/* Replace the following symbol with something appropriate
 * to signify the file is being compiled for a front end instead of a core.
 * This allows the same code to act as reference implementation
 * for VFS and as fallbacks for when the front end does not provide VFS functionality.
 */

#ifdef VFS_FRONTEND
typedef struct retro_vfs_file_handle libretro_vfs_implementation_file;
#else
typedef struct libretro_vfs_implementation_file libretro_vfs_implementation_file;
#endif

#ifdef VFS_FRONTEND
typedef struct retro_vfs_dir_handle libretro_vfs_implementation_dir;
#else
typedef struct libretro_vfs_implementation_dir libretro_vfs_implementation_dir;
#endif

RETRO_END_DECLS

#endif