/*
 * This file is part of zaniWok.
 *
 * zaniWok 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, or (at your option)
 * any later version.  See the file COPYING for more information.
 *
 * zaniWok 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.
 */


#import <stdio.h>
#import <objc/objc.h>   /* typedef BOOL */

#define NUM_TRACKS         35
#define NUM_HALF_TRACKS    (2 * NUM_TRACKS)
#define NUM_QUARTER_TRACKS (4 * NUM_TRACKS)
#define NUM_SECTORS        16

typedef enum {
  DISK_PRODOS        = 0,   /* Do not change these numbers, as they are     */
  DISK_DOS33         = 1,   /* present in files which already exist.  If    */
  DISK_HALFTRACKS    = 2,   /* you wish to add a type, choose a new number. */
  DISK_FULLTRACKS    = 3,
  DISK_QUARTERTRACKS = 4,  /* Is anyone psycho enough to support this? */
} DiskType;


typedef struct {
  DiskType type;        /* Specifies the type of disk.                  */
  int data_offset;      /* Offset into the file where real data begins. */
  FILE *fp;             /* File pointer for this disk file.             */
  BOOL write_protected; /* 'nuff said.                                  */
  union {
    struct {
      int num_blocks;        /* Total # of blocks on the disk. */
      int current_block;
      unsigned char **block; /* Array of pointers to the base of each block. */
    } prodos;
    struct {
      int num_tracks;          /* Total # of tracks on the disk. */
      int current_track, current_sector;
      unsigned char *sector[NUM_TRACKS][NUM_SECTORS];
    } dos33;
    struct {
      int num_tracks;
      struct {
	int track_length;      /* Length of this track.    */
	int file_offset;       /* Offset into file where this track begins. */
	unsigned char *data;   /* Raw data for this track. */
      } track[NUM_QUARTER_TRACKS];

      /* Housekeeping stuff for raw mode. */
      unsigned long last_read_cycles;  /* Cycle count at last read.        */
      int current_track;               /* Might really be half track.      */
      int head_position;               /* "bytes" into current track.      */
      unsigned char write_register;    /* Write register for disk writes.  */
      BOOL magnet[4];                  /* Status of stepper motor magnets. */
    } raw;
  } u;
  void *auxdata;  /* This can be anything. */
} Disk;



extern void init_disk_hacks (const char *disk1, const char *disk2);
extern int disk_ref (AccessType rw, MemoryElement *m, MachineState *state);
extern void swap_d1_d2 (void);
extern int rwts (MachineState *state);