221 lines
5.8 KiB
C
221 lines
5.8 KiB
C
/***
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*dos.h - definitions for MS-DOS interface routines
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*
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* Copyright (c) 1985-1988, Microsoft Corporation. All rights reserved.
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*
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*Purpose:
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* Defines the structs and unions used for the direct DOS interface
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* routines; includes macros to access the segment and offset
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* values of far pointers, so that they may be used by the routines; and
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* provides function prototypes for direct DOS interface functions.
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*
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*******************************************************************************/
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#ifndef NO_EXT_KEYS /* extensions enabled */
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#define _CDECL cdecl
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#define _NEAR near
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#else /* extensions not enabled */
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#define _CDECL
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#define _NEAR
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#endif /* NO_EXT_KEYS */
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#ifndef _REGS_DEFINED
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/* word registers */
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struct WORDREGS {
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unsigned int ax;
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unsigned int bx;
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unsigned int cx;
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unsigned int dx;
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unsigned int si;
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unsigned int di;
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unsigned int cflag;
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};
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/* byte registers */
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struct BYTEREGS {
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unsigned char al, ah;
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unsigned char bl, bh;
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unsigned char cl, ch;
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unsigned char dl, dh;
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};
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/* general purpose registers union -
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* overlays the corresponding word and byte registers.
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*/
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union REGS {
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struct WORDREGS x;
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struct BYTEREGS h;
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};
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/* segment registers */
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struct SREGS {
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unsigned int es;
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unsigned int cs;
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unsigned int ss;
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unsigned int ds;
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};
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#define _REGS_DEFINED
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#endif
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/* dosexterror structure */
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#ifndef _DOSERROR_DEFINED
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struct DOSERROR {
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int exterror;
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char class;
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char action;
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char locus;
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};
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#define _DOSERROR_DEFINED
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#endif
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/* _dos_findfirst structure */
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#ifndef _FIND_T_DEFINED
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struct find_t {
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char reserved[21];
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char attrib;
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unsigned wr_time;
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unsigned wr_date;
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long size;
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char name[13];
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};
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#define _FIND_T_DEFINED
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#endif
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/* _dos_getdate/_dossetdate and _dos_gettime/_dos_settime structures */
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#ifndef _DATETIME_T_DEFINED
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struct dosdate_t {
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unsigned char day; /* 1-31 */
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unsigned char month; /* 1-12 */
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unsigned int year; /* 1980-2099 */
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unsigned char dayofweek; /* 0-6, 0=Sunday */
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};
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struct dostime_t {
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unsigned char hour; /* 0-23 */
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unsigned char minute; /* 0-59 */
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unsigned char second; /* 0-59 */
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unsigned char hsecond; /* 0-99 */
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};
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#define _DATETIME_T_DEFINED
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#endif
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/* _dos_getdiskfree structure */
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#ifndef _DISKFREE_T_DEFINED
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struct diskfree_t {
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unsigned total_clusters;
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unsigned avail_clusters;
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unsigned sectors_per_cluster;
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unsigned bytes_per_sector;
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};
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#define _DISKFREE_T_DEFINED
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#endif
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/* manifest constants for _hardresume result parameter */
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#define _HARDERR_IGNORE 0 /* Ignore the error */
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#define _HARDERR_RETRY 1 /* Retry the operation */
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#define _HARDERR_ABORT 2 /* Abort program issuing Interrupt 23h */
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#define _HARDERR_FAIL 3 /* Fail the system call in progress */
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/* _HARDERR_FAIL is not supported on DOS 2.x */
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/* File attribute constants */
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#define _A_NORMAL 0x00 /* Normal file - No read/write restrictions */
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#define _A_RDONLY 0x01 /* Read only file */
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#define _A_HIDDEN 0x02 /* Hidden file */
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#define _A_SYSTEM 0x04 /* System file */
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#define _A_VOLID 0x08 /* Volume ID file */
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#define _A_SUBDIR 0x10 /* Subdirectory */
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#define _A_ARCH 0x20 /* Archive file */
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/* macros to break MS C "far" pointers into their segment and offset
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* components
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*/
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#define FP_SEG(fp) (*((unsigned *)&(fp) + 1))
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#define FP_OFF(fp) (*((unsigned *)&(fp)))
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/* external variable declarations */
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extern unsigned int _NEAR _CDECL _osversion;
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/* function prototypes */
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int _CDECL bdos(int, unsigned int, unsigned int);
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void _CDECL _disable(void);
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unsigned _CDECL _dos_allocmem(unsigned, unsigned *);
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unsigned _CDECL _dos_close(int);
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unsigned _CDECL _dos_creat(char *, unsigned, int *);
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unsigned _CDECL _dos_creatnew(char *, unsigned, int *);
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unsigned _CDECL _dos_findfirst(char *, unsigned, struct find_t *);
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unsigned _CDECL _dos_findnext(struct find_t *);
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unsigned _CDECL _dos_freemem(unsigned);
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void _CDECL _dos_getdate(struct dosdate_t *);
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void _CDECL _dos_getdrive(unsigned *);
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unsigned _CDECL _dos_getdiskfree(unsigned, struct diskfree_t *);
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unsigned _CDECL _dos_getfileattr(char *, unsigned *);
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unsigned _CDECL _dos_getftime(int, unsigned *, unsigned *);
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void _CDECL _dos_gettime(struct dostime_t *);
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void _CDECL _dos_keep(unsigned, unsigned);
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unsigned _CDECL _dos_open(char *, unsigned, int *);
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unsigned _CDECL _dos_setblock(unsigned, unsigned, unsigned *);
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unsigned _CDECL _dos_setdate(struct dosdate_t *);
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void _CDECL _dos_setdrive(unsigned, unsigned *);
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unsigned _CDECL _dos_setfileattr(char *, unsigned);
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unsigned _CDECL _dos_setftime(int, unsigned, unsigned);
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unsigned _CDECL _dos_settime(struct dostime_t *);
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int _CDECL dosexterr(struct DOSERROR *);
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void _CDECL _enable(void);
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void _CDECL _hardresume(int);
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void _CDECL _hardretn(int);
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int _CDECL intdos(union REGS *, union REGS *);
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int _CDECL intdosx(union REGS *, union REGS *, struct SREGS *);
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int _CDECL int86(int, union REGS *, union REGS *);
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int _CDECL int86x(int, union REGS *, union REGS *, struct SREGS *);
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void _CDECL segread(struct SREGS *);
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#ifndef NO_EXT_KEYS /* extensions enabled */
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void _CDECL _chain_intr(void (_CDECL interrupt far *)());
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void (_CDECL interrupt far * _CDECL _dos_getvect(unsigned))();
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unsigned _CDECL _dos_read(int, void far *, unsigned, unsigned *);
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void _CDECL _dos_setvect(unsigned, void (_CDECL interrupt far *)());
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unsigned _CDECL _dos_write(int, void far *, unsigned, unsigned *);
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void _CDECL _harderr(void (far *)());
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#endif /* NO_EXT_KEYS */
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