/***
*dos.h - definitions for MS-DOS interface routines
*
* Copyright (c) 1985-1993, 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.
*
*Revision History:
* 06-11-87 JCR Added find_t
* 06-15-87 JCR Added O_NOINHERIT
* 06-18-87 JCR Added some DOS function prototypes
* 06-19-87 JCR Moved O_NOINHERIT to fcntl.h
* 06-25-87 JMB Added _HARDERR_* constants
* 06-25-87 SKS Added diskfree_t, dosdate_t, dostime_t structures
* 06-25-87 JCR Added _A_NORMAL, etc. constants
* 07-17-87 JCR Added _chain_intr, also the "interrupt" type to
* _dos_setvec and _dos_getvec.
* 07-27-87 SKS Added several _dos_*() functions, _disable()/_enable()
* 08-17-87 PHG Fixed bad prototype for _dos_getdiskfree()
* 10-08-87 JCR Added _CDECL to prototypes with "interrupt" declaration
* (needed for compiling with -Gc switch).
* 09-27-88 JCR 386 version
* 10-03-88 GJF Use M_I386, not I386
* 05-03-89 JCR Added _INTERNAL_IFSTRIP for relinc usage
* 07-25-89 GJF Major cleanup. Alignment of struct fields is now
* protected by pack pragmas. Now specific to 386.
* 10-30-89 GJF Fixed copyright
* 11-02-89 JCR Changed "DLL" to "_DLL"
* 02-28-90 GJF Added #ifndef _INC_DOS and #include <cruntime.h>
* stuff. Also, removed some (now) useless preprocessor
* directives.
* 03-22-90 GJF Replaced _cdecl with _CALLTYPE1 in prototype and with
* _VARTYPE1 in variable declaration.
* 12-28-90 SRW Added _CRUISER_ conditional around pack pragmas
* 01-23-91 GJF Removed segread() prototype.
* 04-04-91 GJF Added version info variables (_WIN32_).
* 08-20-91 JCR C++ and ANSI naming
* 08-26-91 BWM Added _peek, poke, and _getvideoaddr (_DOSX32_).
* 08-26-91 BWM Removed _harderr constants, replaced by _seterrormode.
* 08-26-91 BWM Removed datetime prototypes, replaced by systime functions.
* 09-05-91 JCR Added missing #endif (bug fix), removed obsolete stuff
* 09-16-91 BWM Fixed reversed #ifdef on screen address constants.
* 01-22-92 GJF Fixed up definitions of global variables for build of,
* and users of, crtdll.dll.
* 03-30-92 DJM POSIX support.
* 06-02-92 SKS Fix typo in DLL declaration of _osmajor
* Add declartion of _pgmptr
* 08-07-92 GJF Function calling type and variable type macros.
* 01-21-93 GJF Removed support for C6-386's _cdecl.
*
****/
#ifndef _INC_DOS
#ifdef __cplusplus
extern "C" {
#endif
#ifndef _INTERNAL_IFSTRIP_
#include <cruntime.h>
#endif /* _INTERNAL_IFSTRIP_ */
/*
* Conditional macro definition for function calling type and variable type
* qualifiers.
*/
#if ( (_MSC_VER >= 800) && (_M_IX86 >= 300) )
/*
* Definitions for MS C8-32 (386/486) compiler
*/
#define _CRTAPI1 __cdecl
#define _CRTAPI2 __cdecl
#else
/*
* Other compilers (e.g., MIPS)
*/
#define _CRTAPI1
#define _CRTAPI2
#endif
#ifdef _CRUISER_
/* ensure proper alignment of struct fields */
#pragma pack(4)
#endif /* ndef _CRUISER_ */
#ifdef _DOSX32_
/* Absolute address type for _peek and _poke */
#ifndef _ABSADDR_T_DEFINED
typedef unsigned long _absaddr_t;
#define _ABSADDR_T_DEFINED
#endif
#endif
/* _getdiskfree structure (duplicated in DIRECT.H) */
#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
#ifdef _DOSX32_
/* Region constants for _getvideoaddress() */
#define _ADDR_NO_PALETTE_GRAPHICS 0x18000 /* For modes 4-6 */
#define _ADDR_PALETTE_GRAPHICS 0x00000 /* For modes 9+ */
#define _ADDR_COLOR_TEXT 0x18000 /* For modes 0-3 */
#define _ADDR_MONO_TEXT 0x10000 /* For mode 7 */
#endif
#ifdef _DOSX32_
/* Macro to convert segmented address to _absaddr_t */
#define _MAKE_ABS(seg,off) ((seg << 16) | (off & 0xffff))
#endif
/* 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_SUBDIR 0x10 /* Subdirectory */
#define _A_ARCH 0x20 /* Archive file */
/* external variable declarations */
#if defined(_WIN32_) || defined(_POSIX_)
#ifdef _DLL
#define _osversion (*_osversion_dll)
#define _osmajor (*_osmajor_dll)
#define _osminor (*_osminor_dll)
#define _baseversion (*_baseversion_dll)
#define _basemajor (*_basemajor_dll)
#define _baseminor (*_baseminor_dll)
#define _pgmptr (*_pgmptr_dll)
extern unsigned int * _CRTVAR1 _osversion_dll;
extern unsigned int * _CRTVAR1 _osmajor_dll;
extern unsigned int * _CRTVAR1 _osminor_dll;
extern unsigned int * _CRTVAR1 _baseversion_dll;
extern unsigned int * _CRTVAR1 _basemajor_dll;
extern unsigned int * _CRTVAR1 _baseminor_dll;
extern char ** _CRTVAR1 _pgmptr_dll;
#else
#ifdef CRTDLL
#define _osversion _osversion_dll
#define _osmajor _osmajor_dll
#define _osminor _osminor_dll
#define _baseversion _baseversion_dll
#define _basemajor _basemajor_dll
#define _baseminor _baseminor_dll
#define _pgmptr _pgmptr_dll
#endif
extern unsigned int _CRTVAR1 _osversion;
extern unsigned int _CRTVAR1 _osmajor;
extern unsigned int _CRTVAR1 _osminor;
extern unsigned int _CRTVAR1 _baseversion;
extern unsigned int _CRTVAR1 _basemajor;
extern unsigned int _CRTVAR1 _baseminor;
extern char * _CRTVAR1 _pgmptr;
#endif
#else /* ndef (_WIN32_ || _POSIX_) */
extern unsigned int _CRTVAR1 _osversion;
#endif /* _WIN32_ */
/* function prototypes */
unsigned _CRTAPI1 _getdiskfree(unsigned, struct _diskfree_t *);
#ifdef _DOSX32_
void * _CRTAPI1 _getvideoaddr(unsigned);
#endif
#ifdef _DOSX32_
void _CRTAPI1 _peek(_absaddr_t, void *, unsigned short);
void _CRTAPI1 _poke(void *, _absaddr_t, unsigned short);
#endif
#if !__STDC__
/* Non-ANSI name for compatibility */
#define diskfree_t _diskfree_t
#endif /* __STDC__ */
/* restore default alignment */
#ifdef _CRUISER_
#pragma pack()
#endif /* ndef _CRUISER_ */
#ifdef __cplusplus
}
#endif
#define _INC_DOS
#endif /* _INC_DOS */
