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/***
*dos.h - definitions for MS-DOS interface routines** Copyright (c) 1985-1990, 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 _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; };
#define _REGS_DEFINED
#endif
/* dosexterror structure */
#ifndef _DOSERROR_DEFINED
struct DOSERROR { int exterror; char class; char action; char locus; };
#define _DOSERROR_DEFINED
#endif
/* _dos_findfirst structure */
#ifndef _FIND_T_DEFINED
struct find_t { char reserved[21]; char attrib; unsigned wr_time; unsigned wr_date; long size; char name[13]; };
#define _FIND_T_DEFINED
#endif
/* _dos_getdate/_dossetdate and _dos_gettime/_dos_settime structures */
#ifndef _DATETIME_T_DEFINED
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 */ };
#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; };
#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)))
/* external variable declarations */
extern unsigned int _near _cdecl _osversion;
/* function prototypes */
#ifndef _MT
int _cdecl bdos(int, unsigned int, unsigned int);void _cdecl _chain_intr(void (_cdecl _interrupt _far *)());void _cdecl _disable(void);unsigned _cdecl _dos_allocmem(unsigned, unsigned *);unsigned _cdecl _dos_close(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 *);unsigned _cdecl _dos_freemem(unsigned);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))();void _cdecl _dos_keep(unsigned, unsigned);unsigned _cdecl _dos_open(const char *, unsigned, int *);unsigned _cdecl _dos_read(int, void _far *, unsigned, unsigned *);unsigned _cdecl _dos_setblock(unsigned, unsigned, unsigned *);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 *);void _cdecl _dos_setvect(unsigned, void (_cdecl _interrupt _far *)());unsigned _cdecl _dos_write(int, const void _far *, unsigned, unsigned *);int _cdecl dosexterr(struct DOSERROR *);void _cdecl _enable(void);void _cdecl _harderr(void (_far *)());void _cdecl _hardresume(int);void _cdecl _hardretn(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 *);#endif /* _MT */
void _cdecl segread(struct SREGS *);
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