Source code of Windows XP (NT5)
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/***
*dos.h - definitions for MS-DOS interface routines** Copyright (c) 1985-1994, 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
#define _INC_DOS
#ifdef __cplusplus
extern "C" {#endif
/* Define _CRTAPI1 (for compatibility with the NT SDK) */
#ifndef _CRTAPI1
#if ( (_MSC_VER >= 800) && (_M_IX86 >= 300) )
#define _CRTAPI1 __cdecl
#else
#define _CRTAPI1
#endif
#endif
/* Define _CRTAPI2 (for compatibility with the NT SDK) */
#ifndef _CRTAPI2
#if ( (_MSC_VER >= 800) && (_M_IX86 >= 300) )
#define _CRTAPI2 __cdecl
#else
#define _CRTAPI2
#endif
#endif
/* Define _CRTIMP */
#ifndef _CRTIMP
#ifdef _NTSDK
/* definition compatible with NT SDK */#define _CRTIMP
#else /* ndef _NTSDK */
/* current definition */#ifdef _DLL
#define _CRTIMP __declspec(dllimport)
#else /* ndef _DLL */
#define _CRTIMP
#endif /* _DLL */
#endif /* _NTSDK */
#endif /* _CRTIMP */
/* Define __cdecl for non-Microsoft compilers */
#if ( !defined(_MSC_VER) && !defined(__cdecl) )
#define __cdecl
#endif
#ifndef _WCHAR_T_DEFINED
typedef unsigned short wchar_t;#define _WCHAR_T_DEFINED
#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 */
#ifdef _NTSDK
/* External variable declarations */
/*
* WARNING! The _osversion, _osmajor, _osminor, _baseversion, _basemajor and * _baseminor variables were never meaningfully defined in the C runtime * libraries for Win32 platforms. Any code which references these variables * should be revised (see the declarations for version information variables * in stdlib.h). */
#ifdef _DLL
/* --------- The following block is OBSOLETE --------- */
#define _osversion (*_osversion_dll)
#define _osmajor (*_osmajor_dll)
#define _osminor (*_osminor_dll)
#define _baseversion (*_baseversion_dll)
#define _basemajor (*_basemajor_dll)
#define _baseminor (*_baseminor_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;
/* --------- The preceding block is OBSOLETE --------- */
#define _pgmptr (*_pgmptr_dll)
#define _wpgmptr (*_wpgmptr_dll)
extern char ** _pgmptr_dll;extern wchar_t ** _wpgmptr_dll;
#else /* ndef _DLL */
/* --------- The following block is OBSOLETE --------- */
extern unsigned int _osversion;extern unsigned int _osmajor;extern unsigned int _osminor;extern unsigned int _baseversion;extern unsigned int _basemajor;extern unsigned int _baseminor;
/* --------- The preceding block is OBSOLETE --------- */
extern char * _pgmptr;extern wchar_t * _wpgmptr;
#endif /* _DLL */
#endif /* _NTSDK */
/* Function prototypes */
_CRTIMP unsigned __cdecl _getdiskfree(unsigned, struct _diskfree_t *);#ifdef _M_IX86
void __cdecl _disable(void);void __cdecl _enable(void);#endif /* _M_IX86 */
#if !__STDC__
/* Non-ANSI name for compatibility */#define diskfree_t _diskfree_t
#endif /* __STDC__ */
#ifdef __cplusplus
}#endif
#endif /* _INC_DOS */
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