/*
adapted from dos.h in the mach dos emulator for the linux dosemu dos
emulator.
Andrew.Tridgell@anu.edu.au 30th March 1993
*/

#ifdef DOSEMU
/* definitions to make mach emu code compatible with dosemu */
#include <sys/vfs.h>
#include "dosemu.h"

#if 0
typedef unsigned char boolean_t;
#endif

#define direct dirent
#define d_namlen d_reclen

#ifndef MAX_DRIVE
#define MAX_DRIVE 26
#endif

#define USE_DF_AND_AFS_STUFF

#define VOLUMELABEL "Linux"

#define LINUX_RESOURCE "\\\\LINUX\\FS"

#define FALSE 0
#define TRUE 1
#define UNCHANGED 2
#define REDIRECT 3

#define us_debug_level 10
#define Debug_Level_0 0
#define dbg_fd d.disk

#define d_Stub(arg1, s, a...)   d_printf("MFS: "s, ##a)
#define Debug0(args)		d_Stub args
#define Debug1(args)		d_Stub args

#if 0
typedef struct vm86_regs state_t;
#endif

#define Addr_8086(x,y)	(( ((x) & 0xffff) << 4) + ((y) & 0xffff))
#define Addr(s,x,y)	Addr_8086(((s)->x), ((s)->y))
#define MASK8(x)	((x) & 0xff)
#define MASK16(x)	((x) & 0xffff)
#define HIGH(x)		MASK8((unsigned long)(x) >> 8)
#define LOW(x)		MASK8((unsigned long)(x))
#undef WORD
#define WORD(x)		MASK16((unsigned long)(x))
#define SETHIGH(x,y) 	(*(x) = (*(x) & ~0xff00) | ((MASK8(y))<<8))
#define SETLOW(x,y) 	(*(x) = (*(x) & ~0xff) | (MASK8(y)))
#define SETWORD(x,y)	(*(x) = (*(x) & ~0xffff) | (MASK16(y)))
#endif

/*
 * Copyright (c) 1991 Carnegie Mellon University
 * All Rights Reserved.
 *
 * Permission to use, copy, modify and distribute this software and its
 * documentation is hereby granted, provided that both the copyright
 * notice and this permission notice appear in all copies of the
 * software, derivative works or modified versions, and any portions
 * thereof, and that both notices appear in supporting documentation.
 *
 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 *
 * Carnegie Mellon requests users of this software to return to
 *
 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
 *  School of Computer Science
 *  Carnegie Mellon University
 *  Pittsburgh PA 15213-3890
 *
 * any improvements or extensions that they make and grant Carnegie Mellon
 * the rights to redistribute these changes.
 */
/*
 *
 * Purpose:
 *	V86 DOS disk emulation header file
 */

#include <sys/types.h>

/*
 * Dos error codes
 */
/* MS-DOS version 2 error codes */
#define FUNC_NUM_IVALID		0x01
#define FILE_NOT_FOUND		0x02
#define PATH_NOT_FOUND		0x03
#define TOO_MANY_OPEN_FILES	0x04
#define ACCESS_DENIED		0x05
#define HANDLE_INVALID		0x06
#define MEM_CB_DEST		0x07
#define INSUF_MEM		0x08
#define MEM_BLK_ADDR_IVALID	0x09
#define ENV_INVALID		0x0a
#define FORMAT_INVALID		0x0b
#define ACCESS_CODE_INVALID	0x0c
#define DATA_INVALID		0x0d
#define UNKNOWN_UNIT		0x0e
#define DISK_DRIVE_INVALID	0x0f
#define ATT_REM_CUR_DIR		0x10
#define NOT_SAME_DEV		0x11
#define NO_MORE_FILES		0x12
/* mappings to critical-error codes */
#define WRITE_PROT_DISK		0x13
#define UNKNOWN_UNIT_CERR	0x14
#define DRIVE_NOT_READY		0x15
#define UNKNOWN_COMMAND		0x16
#define DATA_ERROR_CRC		0x17
#define BAD_REQ_STRUCT_LEN	0x18
#define SEEK_ERROR		0x19
#define UNKNOWN_MEDIA_TYPE	0x1a
#define SECTOR_NOT_FOUND	0x1b
#define PRINTER_OUT_OF_PAPER	0x1c
#define WRITE_FAULT		0x1d
#define READ_FAULT		0x1e
#define GENERAL_FAILURE		0x1f

/* MS-DOS version 3 and later extended error codes */
#define SHARING_VIOLATION	0x20
#define FILE_LOCK_VIOLATION	0x21
#define DISK_CHANGE_INVALID	0x22
#define FCB_UNAVAILABLE		0x23
#define SHARING_BUF_EXCEEDED	0x24

#define NETWORK_NAME_NOT_FOUND	0x35

#define FILE_ALREADY_EXISTS	0x50

#define DUPLICATE_REDIR		0x55

struct dir_ent {
  char name[8];			/* dos name and ext */
  char ext[3];
  u_short mode;			/* unix st_mode value */
  boolean_t hidden;
  long size;			/* size of file */
  time_t time;			/* st_mtime */
  struct dir_ent *next;
};

struct dos_name {
  char name[8];
  char ext[3];
};

typedef struct far_record {
  u_short offset;
  u_short segment;
} far_t;

#define DOSVER_31_33	1
#define DOSVER_41	2
#define DOSVER_50	3
#define DOSVER_60	4

typedef u_char *sdb_t;

#define sdb_drive_letter(sdb)	(*(u_char  *)&sdb[sdb_drive_letter_off])
#define sdb_template_name(sdb)	((u_char   *)&sdb[sdb_template_name_off])
#define sdb_template_ext(sdb)	((u_char   *)&sdb[sdb_template_ext_off])
#define	sdb_attribute(sdb)	(*(u_char  *)&sdb[sdb_attribute_off])
#define sdb_dir_entry(sdb)	(*(u_short *)&sdb[sdb_dir_entry_off])
#define sdb_p_cluster(sdb)	(*(u_short *)&sdb[sdb_p_cluster_off])
#define	sdb_file_name(sdb)	((char     *)&sdb[sdb_file_name_off])
#define	sdb_file_ext(sdb)	((char     *)&sdb[sdb_file_ext_off])
#define	sdb_file_attr(sdb)	(*(u_char  *)&sdb[sdb_file_attr_off])
#define	sdb_file_time(sdb)	(*(u_short *)&sdb[sdb_file_time_off])
#define	sdb_file_date(sdb)	(*(u_short *)&sdb[sdb_file_date_off])
#define sdb_file_st_cluster(sdb)(*(u_short *)&sdb[sdb_file_st_cluster_off])
#define sdb_file_size(sdb)	(*(u_long  *)&sdb[sdb_file_size_off])

typedef u_char *sft_t;

#define sft_handle_cnt(sft) 	(*(u_short *)&sft[sft_handle_cnt_off])
#define sft_open_mode(sft)  	(*(u_short *)&sft[sft_open_mode_off])
#define sft_attribute_byte(sft) (*(u_char  *)&sft[sft_attribute_byte_off])
#define sft_device_info(sft)  	(*(u_short *)&sft[sft_device_info_off])
#define	sft_dev_drive_ptr(sft)	(*(u_long  *)&sft[sft_dev_drive_ptr_off])
#define	sft_start_cluster(sft)	(*(u_short *)&sft[sft_start_cluster_off])
#define	sft_time(sft)		(*(u_short *)&sft[sft_time_off])
#define	sft_date(sft)		(*(u_short *)&sft[sft_date_off])
#define	sft_size(sft)		(*(u_long  *)&sft[sft_size_off])
#define	sft_position(sft)	(*(u_long  *)&sft[sft_position_off])
#define sft_rel_cluster(sft)	(*(u_short *)&sft[sft_rel_cluster_off])
#define sft_abs_cluster(sft)	(*(u_short *)&sft[sft_abs_cluster_off])
#define	sft_directory_sector(sft) (*(u_short *)&sft[sft_directory_sector_off])
#define	sft_directory_entry(sft)  (*(u_char  *)&sft[sft_directory_entry_off])
#define	sft_name(sft)		( (char    *)&sft[sft_name_off])
#define	sft_ext(sft)		( (char    *)&sft[sft_ext_off])

#define	sft_fd(sft)		(*(u_short *)&sft[sft_fd_off])

typedef u_char *cds_t;

#define	cds_current_path(cds)	((char	   *)&cds[cds_current_path_off])
#define	cds_flags(cds)		(*(u_short *)&cds[cds_flags_off])
#define cds_DBP_pointer(cds)	(*(far_t *)&cds[cds_DBP_pointer_off])
#define cds_cur_cluster(cds)	(*(u_short *)&cds[cds_cur_cluster_off])
#define	cds_rootlen(cds)	(*(u_short *)&cds[cds_rootlen_off])
#define drive_cds(dd) ((cds_t)(((int)cds_base)+(cds_record_size*(dd))))

#define CDS_FLAG_REMOTE		0x8000
#define CDS_FLAG_READY		0x4000
#define CDS_FLAG_NOTNET		0x0080
#define CDS_FLAG_SUBST		0x1000
#define CDS_DEFAULT_ROOT_LEN	2

#define FAR(x) (Addr_8086(x.segment, x.offset))
#define FARPTR(x) (Addr_8086((x)->segment, (x)->offset))

typedef u_short *psp_t;

#define PSPPTR(x) (Addr_8086(x, 0))

typedef u_char *sda_t;

#define	sda_current_dta(sda)	((char *)(FARPTR((far_t *)&sda[sda_current_dta_off])))
#define sda_cur_psp(sda)		(*(u_short *)&sda[sda_cur_psp_off])
#define sda_filename1(sda)		((char  *)&sda[sda_filename1_off])
#define	sda_filename2(sda)		((char  *)&sda[sda_filename2_off])
#define sda_sdb(sda)			((sdb_t    )&sda[sda_sdb_off])
#define	sda_cds(sda)		((cds_t)(FARPTR((far_t *)&sda[sda_cds_off])))
#define sda_search_attribute(sda)	(*(u_char *)&sda[sda_search_attribute_off])
#define sda_open_mode(sda)		(*(u_char *)&sda[sda_open_mode_off])
#define sda_rename_source(sda)		((sdb_t    )&sda[sda_rename_source_off])
#define sda_user_stack(sda)		((char *)(FARPTR((far_t *)&sda[sda_user_stack_off])))

/*
 *  Data for extended open/create operations, DOS 4 or greater:
 */
#define sda_ext_act(sda)		(*(u_short *)&sda[sda_ext_act_off])
#define sda_ext_attr(sda)		(*(u_short *)&sda[sda_ext_attr_off])
#define sda_ext_mode(sda)		(*(u_short *)&sda[sda_ext_mode_off])

#define psp_parent_psp(psp)		(*(u_short *)&psp[0x16])
#define psp_handles(psp)		((char *)(FARPTR((far_t *)&psp[0x34])))

#define lol_cdsfarptr(lol)		(*(far_t *)&lol[lol_cdsfarptr_off])
#define lol_last_drive(lol)		(*(u_char *)&lol[lol_last_drive_off])

typedef u_char *lol_t;

#ifdef OLD_OBSOLETE
typedef struct lol_record {
  u_char filler1[22];
  far_t cdsfarptr;
  u_char filler2[6];
  u_char last_drive;
} *lol_t;

#endif

/* dos attribute byte flags */
#define REGULAR_FILE 	0x00
#define READ_ONLY_FILE	0x01
#define HIDDEN_FILE	0x02
#define SYSTEM_FILE	0x04
#define VOLUME_LABEL	0x08
#define DIRECTORY	0x10
#define ARCHIVE_NEEDED	0x20

/* dos access mode constants */
#define READ_ACC	0x00
#define WRITE_ACC	0x01
#define READ_WRITE_ACC	0x02

#define COMPAT_MODE	0x00
#define DENY_ALL	0x01
#define DENY_WRITE	0x02
#define DENY_READ	0x03
#define DENY_ANY	0x40

#define CHILD_INHERIT	0x00
#define NO_INHERIT	0x01

#define A_DRIVE		0x01
#define B_DRIVE		0x02
#define C_DRIVE		0x03
#define D_DRIVE		0x04

#define GET_REDIRECTION	2
#define REDIRECT_DEVICE 3
#define CANCEL_REDIRECTION 4
#define EXTENDED_GET_REDIRECTION 5
