/***
*dos.h - definitions for MS-DOS interface routines
*
* Copyright (c) 1985-1992, Microsoft Corporation. All rights reserved.
*
*Purpose:
* Defines the structs and unions used for the direct DOS interface
* routines; includes macros to access the segment and offset
* values of far pointers, so that they may be used by the routines; and
* provides function prototypes for direct DOS interface functions.
*
****/
#ifndef _INC_DOS
#ifdef __cplusplus
extern "C" {
#endif
#if (_MSC_VER <= 600)
#define __cdecl _cdecl
#define __far _far
#define __interrupt _interrupt
#define __near _near
#endif
#ifndef _REGS_DEFINED
/* word registers */
struct _WORDREGS {
unsigned int ax;
unsigned int bx;
unsigned int cx;
unsigned int dx;
unsigned int si;
unsigned int di;
unsigned int cflag;
};
/* byte registers */
struct _BYTEREGS {
unsigned char al, ah;
unsigned char bl, bh;
unsigned char cl, ch;
unsigned char dl, dh;
};
/* general purpose registers union -
* overlays the corresponding word and byte registers.
*/
union _REGS {
struct _WORDREGS x;
struct _BYTEREGS h;
};
/* segment registers */
struct _SREGS {
unsigned int es;
unsigned int cs;
unsigned int ss;
unsigned int ds;
};
#ifndef __STDC__
/* Non-ANSI names for compatibility */
struct WORDREGS {
unsigned int ax;
unsigned int bx;
unsigned int cx;
unsigned int dx;
unsigned int si;
unsigned int di;
unsigned int cflag;
};
struct BYTEREGS {
unsigned char al, ah;
unsigned char bl, bh;
unsigned char cl, ch;
unsigned char dl, dh;
};
union REGS {
struct WORDREGS x;
struct BYTEREGS h;
};
struct SREGS {
unsigned int es;
unsigned int cs;
unsigned int ss;
unsigned int ds;
};
#endif
#define _REGS_DEFINED
#endif
/* dosexterror structure */
#ifndef _DOSERROR_DEFINED
#pragma pack(2)
struct _DOSERROR {
int exterror;
char errclass;
char action;
char locus;
};
#if ((!defined (__STDC__)) && (!defined (__cplusplus)))
/* Non-ANSI name for compatibility */
struct DOSERROR {
int exterror;
char class;
char action;
char locus;
};
#endif
#pragma pack()
#define _DOSERROR_DEFINED
#endif
/* _dos_findfirst structure */
#ifndef _FIND_T_DEFINED
#pragma pack(2)
struct _find_t {
char reserved[21];
char attrib;
unsigned wr_time;
unsigned wr_date;
long size;
char name[13];
};
#ifndef __STDC__
/* Non-ANSI name for compatibility */
#define find_t _find_t
#endif
#pragma pack()
#define _FIND_T_DEFINED
#endif
/* _dos_getdate/_dossetdate and _dos_gettime/_dos_settime structures */
#ifndef _DATETIME_T_DEFINED
#pragma pack(2)
struct _dosdate_t {
unsigned char day; /* 1-31 */
unsigned char month; /* 1-12 */
unsigned int year; /* 1980-2099 */
unsigned char dayofweek; /* 0-6, 0=Sunday */
};
struct _dostime_t {
unsigned char hour; /* 0-23 */
unsigned char minute; /* 0-59 */
unsigned char second; /* 0-59 */
unsigned char hsecond; /* 0-99 */
};
#ifndef __STDC__
/* Non-ANSI names for compatibility */
#define dosdate_t _dosdate_t
#define dostime_t _dostime_t
#endif
#pragma pack()
#define _DATETIME_T_DEFINED
#endif
/* _dos_getdiskfree structure */
#ifndef _DISKFREE_T_DEFINED
struct _diskfree_t {
unsigned total_clusters;
unsigned avail_clusters;
unsigned sectors_per_cluster;
unsigned bytes_per_sector;
};
#ifndef __STDC__
/* Non-ANSI name for compatibility */
#define diskfree_t _diskfree_t
#endif
#define _DISKFREE_T_DEFINED
#endif
/* manifest constants for _hardresume result parameter */
#define _HARDERR_IGNORE 0 /* Ignore the error */
#define _HARDERR_RETRY 1 /* Retry the operation */
#define _HARDERR_ABORT 2 /* Abort program issuing Interrupt 23h */
#define _HARDERR_FAIL 3 /* Fail the system call in progress */
/* _HARDERR_FAIL is not supported on DOS 2.x */
/* File attribute constants */
#define _A_NORMAL 0x00 /* Normal file - No read/write restrictions */
#define _A_RDONLY 0x01 /* Read only file */
#define _A_HIDDEN 0x02 /* Hidden file */
#define _A_SYSTEM 0x04 /* System file */
#define _A_VOLID 0x08 /* Volume ID file */
#define _A_SUBDIR 0x10 /* Subdirectory */
#define _A_ARCH 0x20 /* Archive file */
/* macros to break C "far" pointers into their segment and offset components
*/
#define _FP_SEG(fp) (*((unsigned __far *)&(fp)+1))
#define _FP_OFF(fp) (*((unsigned __far *)&(fp)))
/* macro to construct a far pointer from segment and offset values
*/
#define _MK_FP(seg, offset) (void __far *)(((unsigned long)seg << 16) \
+ (unsigned long)(unsigned)offset)
/* external variable declarations */
extern unsigned int __near __cdecl _osversion;
/* function prototypes */
#ifndef _MT
int __cdecl _bdos(int, unsigned int, unsigned int);
#ifndef _WINDOWS
void __cdecl _chain_intr(void (__cdecl __interrupt __far *)());
#endif
void __cdecl _disable(void);
#ifndef _WINDOWS
unsigned __cdecl _dos_allocmem(unsigned, unsigned *);
#endif
unsigned __cdecl _dos_close(int);
unsigned __cdecl _dos_commit(int);
unsigned __cdecl _dos_creat(const char *, unsigned, int *);
unsigned __cdecl _dos_creatnew(const char *, unsigned, int *);
unsigned __cdecl _dos_findfirst(const char *, unsigned, struct _find_t *);
unsigned __cdecl _dos_findnext(struct _find_t *);
#ifndef _WINDOWS
unsigned __cdecl _dos_freemem(unsigned);
#endif
void __cdecl _dos_getdate(struct _dosdate_t *);
void __cdecl _dos_getdrive(unsigned *);
unsigned __cdecl _dos_getdiskfree(unsigned, struct _diskfree_t *);
unsigned __cdecl _dos_getfileattr(const char *, unsigned *);
unsigned __cdecl _dos_getftime(int, unsigned *, unsigned *);
void __cdecl _dos_gettime(struct _dostime_t *);
void (__cdecl __interrupt __far * __cdecl _dos_getvect(unsigned))();
#ifndef _WINDOWS
void __cdecl _dos_keep(unsigned, unsigned);
#endif
unsigned __cdecl _dos_lock(int, int, unsigned long, unsigned long);
unsigned __cdecl _dos_open(const char *, unsigned, int *);
unsigned __cdecl _dos_read(int, void __far *, unsigned, unsigned *);
unsigned long __cdecl _dos_seek(int, unsigned long, int);
#ifndef _WINDOWS
unsigned __cdecl _dos_setblock(unsigned, unsigned, unsigned *);
#endif
unsigned __cdecl _dos_setdate(struct _dosdate_t *);
void __cdecl _dos_setdrive(unsigned, unsigned *);
unsigned __cdecl _dos_setfileattr(const char *, unsigned);
unsigned __cdecl _dos_setftime(int, unsigned, unsigned);
unsigned __cdecl _dos_settime(struct _dostime_t *);
#ifndef _WINDOWS
void __cdecl _dos_setvect(unsigned, void (__cdecl __interrupt __far *)());
#endif
unsigned __cdecl _dos_write(int, const void __far *, unsigned, unsigned *);
int __cdecl _dosexterr(struct _DOSERROR *);
void __cdecl _enable(void);
#ifndef _WINDOWS
void __cdecl _harderr(void (__far __cdecl *)(unsigned, unsigned,
unsigned __far *));
void __cdecl _hardresume(int);
void __cdecl _hardretn(int);
#endif
int __cdecl _intdos(union _REGS *, union _REGS *);
int __cdecl _intdosx(union _REGS *, union _REGS *, struct _SREGS *);
int __cdecl _int86(int, union _REGS *, union _REGS *);
int __cdecl _int86x(int, union _REGS *, union _REGS *, struct _SREGS *);
#endif
void __cdecl _segread(struct _SREGS *);
#ifndef __STDC__
/* Non-ANSI names for compatibility */
#define FP_SEG _FP_SEG
#define FP_OFF _FP_OFF
#define MK_FP _MK_FP
#ifndef _MT
int __cdecl bdos(int, unsigned int, unsigned int);
int __cdecl intdos(union REGS *, union REGS *);
int __cdecl intdosx(union REGS *, union REGS *, struct SREGS *);
int __cdecl int86(int, union REGS *, union REGS *);
int __cdecl int86x(int, union REGS *, union REGS *, struct SREGS *);
#ifndef __cplusplus
int __cdecl dosexterr(struct DOSERROR *);
#endif
#endif
void __cdecl segread(struct SREGS *);
#endif
#ifdef __cplusplus
}
#endif
#define _INC_DOS
#endif
