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/***
*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.
*
****/
#ifndef _INC_DOS
#ifdef __cplusplus
extern "C" {
#endif
/*
* 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
/* _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
/* 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 * _osversion_dll;
extern unsigned int * _osmajor_dll;
extern unsigned int * _osminor_dll;
extern unsigned int * _baseversion_dll;
extern unsigned int * _basemajor_dll;
extern unsigned int * _baseminor_dll;
extern char ** _pgmptr_dll;
#else
extern unsigned int _osversion;
extern unsigned int _osmajor;
extern unsigned int _osminor;
extern unsigned int _baseversion;
extern unsigned int _basemajor;
extern unsigned int _baseminor;
extern char * _pgmptr;
#endif
#else /* ndef (_WIN32_ || _POSIX_) */
extern unsigned int _osversion;
#endif /* _WIN32_ */
/* function prototypes */
unsigned _CRTAPI1 _getdiskfree(unsigned, struct _diskfree_t *);
#if !__STDC__
/* Non-ANSI name for compatibility */
#define diskfree_t _diskfree_t
#endif /* __STDC__ */
/* restore default alignment */
#ifdef __cplusplus
}
#endif
#define _INC_DOS
#endif /* _INC_DOS */
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