dos.h

C标准库源代码

/***
*dos.h - definitions for MS-DOS interface routines
*
*       Copyright (c) 1985-1997, 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.
*
*       [Public]
*
****/

#if _MSC_VER > 1000
#pragma once
#endif  /* _MSC_VER > 1000 */

#ifndef _INC_DOS
#define _INC_DOS

#if !defined (_WIN32) && !defined (_MAC)
#error ERROR: Only Mac or Win32 targets supported!
#endif  /* !defined (_WIN32) && !defined (_MAC) */

#ifndef _CRTBLD
/* This version of the header files is NOT for user programs.
 * It is intended for use when building the C runtimes ONLY.
 * The version intended for public use will not have this message.
 */
#error ERROR: Use of C runtime library internal header file.
#endif  /* _CRTBLD */

#ifdef _MSC_VER
/*
 * Currently, all MS C compilers for Win32 platforms default to 8 byte
 * alignment.
 */
#pragma pack(push,8)
#endif  /* _MSC_VER */

#ifdef __cplusplus
extern "C" {
#endif  /* __cplusplus */

#ifndef _INTERNAL_IFSTRIP_
#include <cruntime.h>
#endif  /* _INTERNAL_IFSTRIP_ */


/* Define _CRTIMP */

#ifndef _CRTIMP
#ifdef CRTDLL
#define _CRTIMP __declspec(dllexport)
#else  /* CRTDLL */
#ifdef _DLL
#define _CRTIMP __declspec(dllimport)
#else  /* _DLL */
#define _CRTIMP
#endif  /* _DLL */
#endif  /* CRTDLL */
#endif  /* _CRTIMP */


/* Define __cdecl for non-Microsoft compilers */

#if (!defined (_MSC_VER) && !defined (__cdecl))
#define __cdecl
#endif  /* (!defined (_MSC_VER) && !defined (__cdecl)) */

/* Define _CRTAPI1 (for compatibility with the NT SDK) */

#ifndef _CRTAPI1
#if _MSC_VER >= 800 && _M_IX86 >= 300
#define _CRTAPI1 __cdecl
#else  /* _MSC_VER >= 800 && _M_IX86 >= 300 */
#define _CRTAPI1
#endif  /* _MSC_VER >= 800 && _M_IX86 >= 300 */
#endif  /* _CRTAPI1 */

#ifndef _MAC
#ifndef _WCHAR_T_DEFINED
typedef unsigned short wchar_t;
#define _WCHAR_T_DEFINED
#endif  /* _WCHAR_T_DEFINED */
#endif  /* _MAC */

#ifndef _MAC
#ifndef _DISKFREE_T_DEFINED
/* _getdiskfree structure (duplicated in DIRECT.H) */
struct _diskfree_t {
        unsigned total_clusters;
        unsigned avail_clusters;
        unsigned sectors_per_cluster;
        unsigned bytes_per_sector;
        };

#define _DISKFREE_T_DEFINED
#endif  /* _DISKFREE_T_DEFINED */
#endif  /* _MAC */

/* 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 */

#ifndef _MAC
/* Function prototypes */
_CRTIMP unsigned __cdecl _getdiskfree(unsigned, struct _diskfree_t *);
#endif  /* _MAC */

#ifdef _M_IX86
void __cdecl _disable(void);
void __cdecl _enable(void);
#endif  /* _M_IX86 */

#ifndef _MAC
#if !__STDC__
/* Non-ANSI name for compatibility */
#define diskfree_t  _diskfree_t
#endif  /* !__STDC__ */
#endif  /* _MAC */

#ifdef __cplusplus
}
#endif  /* __cplusplus */

#ifdef _MSC_VER
#pragma pack(pop)
#endif  /* _MSC_VER */

#endif  /* _INC_DOS */