internal.h

C标准库源代码

/***
*internal.h - contains declarations of internal routines and variables
*
*       Copyright (c) 1985-1997, Microsoft Corporation. All rights reserved.
*
*Purpose:
*       Declares routines and variables used internally by the C run-time.
*
*       [Internal]
*
****/

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

#ifndef _INC_INTERNAL
#define _INC_INTERNAL

#ifndef _CRTBLD
/*
 * This is an internal C runtime header file. It is used when building
 * the C runtimes only. It is not to be used as a public header file.
 */
#error ERROR: Use of C runtime library internal header file.
#endif  /* _CRTBLD */

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

#include <cruntime.h>

/*
 * Conditionally include windows.h to pick up the definition of
 * CRITICAL_SECTION.
 */
#ifdef _MT
#include <windows.h>
#endif  /* _MT */


/* 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 _CRTIMP1 */

#ifndef _CRTIMP1
#ifdef CRTDLL1
#define _CRTIMP1 __declspec(dllexport)
#else  /* CRTDLL1 */
#define _CRTIMP1 _CRTIMP
#endif  /* CRTDLL1 */
#endif  /* _CRTIMP1 */


/* Define _CRTIMP2 */
#ifndef _CRTIMP2
#ifdef CRTDLL2
#define _CRTIMP2 __declspec(dllexport)
#else  /* CRTDLL2 */
#ifdef _DLL
#define _CRTIMP2 __declspec(dllimport)
#else  /* _DLL */
#define _CRTIMP2
#endif  /* _DLL */
#endif  /* CRTDLL2 */
#endif  /* _CRTIMP2 */


/* Define __cdecl for non-Microsoft compilers */

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

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

/* Define function type used in several startup sources */

typedef void (__cdecl *_PVFV)(void);


#if defined (_DLL) && defined (_M_IX86)
/* Retained for compatibility with VC++ 5.0 and earlier versions */
_CRTIMP int * __p__commode(void);
#endif  /* defined (_DLL) && defined (_M_IX86) */
#if defined (SPECIAL_CRTEXE) && defined (_DLL)
        extern int _commode;
#else  /* defined (SPECIAL_CRTEXE) && defined (_DLL) */
_CRTIMP extern int _commode;
#endif  /* defined (SPECIAL_CRTEXE) && defined (_DLL) */


#ifdef _WIN32

/*
 * Control structure for lowio file handles
 */
typedef struct {
        long osfhnd;    /* underlying OS file HANDLE */
        char osfile;    /* attributes of file (e.g., open in text mode?) */
        char pipech;    /* one char buffer for handles opened on pipes */
#ifdef _MT
        int lockinitflag;
        CRITICAL_SECTION lock;
#endif  /* _MT */
    }   ioinfo;

/*
 * Definition of IOINFO_L2E, the log base 2 of the number of elements in each
 * array of ioinfo structs.
 */
#define IOINFO_L2E          5

/*
 * Definition of IOINFO_ARRAY_ELTS, the number of elements in ioinfo array
 */
#define IOINFO_ARRAY_ELTS   (1 << IOINFO_L2E)

/*
 * Definition of IOINFO_ARRAYS, maximum number of supported ioinfo arrays.
 */
#define IOINFO_ARRAYS       64

#define _NHANDLE_           (IOINFO_ARRAYS * IOINFO_ARRAY_ELTS)

/*
 * Access macros for getting at an ioinfo struct and its fields from a
 * file handle
 */
#define _pioinfo(i) ( __pioinfo[(i) >> IOINFO_L2E] + ((i) & (IOINFO_ARRAY_ELTS - \
                              1)) )
#define _osfhnd(i)  ( _pioinfo(i)->osfhnd )

#define _osfile(i)  ( _pioinfo(i)->osfile )

#define _pipech(i)  ( _pioinfo(i)->pipech )

/*
 * Safer versions of the above macros. Currently, only _osfile_safe is
 * used.
 */
#define _pioinfo_safe(i)    ( ((i) != -1) ? _pioinfo(i) : &__badioinfo )

#define _osfhnd_safe(i)     ( _pioinfo_safe(i)->osfhnd )

#define _osfile_safe(i)     ( _pioinfo_safe(i)->osfile )

#define _pipech_safe(i)     ( _pioinfo_safe(i)->pipech )

/*
 * Special, static ioinfo structure used only for more graceful handling
 * of a C file handle value of -1 (results from common errors at the stdio
 * level).
 */
extern _CRTIMP ioinfo __badioinfo;

/*
 * Array of arrays of control structures for lowio files.
 */
extern _CRTIMP ioinfo * __pioinfo[];

/*
 * Current number of allocated ioinfo structures (_NHANDLE_ is the upper
 * limit).
 */
extern int _nhandle;

#else  /* _WIN32 */

/*
 * Define the number of supported handles. This definition must exactly match
 * the one in mtdll.h.
 */
#ifdef CRTDLL
#define _NHANDLE_   512     /* *MUST* match the value under ifdef _DLL! */
#else  /* CRTDLL */
#ifdef _DLL
#define _NHANDLE_   512
#else  /* _DLL */
#ifdef _MT
#define _NHANDLE_   256
#else  /* _MT */
#define _NHANDLE_   64
#endif  /* _MT */
#endif  /* _DLL */
#endif  /* CRTDLL */

extern int _nhandle;        /* == _NHANDLE_, set in ioinit.c */

extern char _osfile[];

extern  int _osfhnd[];

#ifdef _MAC

extern unsigned char _osperm[];
extern short _osVRefNum[];
extern int _nfile;                /*old -- check sources */
extern unsigned int _tmpoff;      /*old -- check source */

extern unsigned char _osfileflags[];
#define FTEMP           0x01

#endif  /* _MAC */

#endif  /* _WIN32 */

int __cdecl _alloc_osfhnd(void);
int __cdecl _free_osfhnd(int);
int __cdecl _set_osfhnd(int,long);


extern const char __dnames[];
extern const char __mnames[];

extern int _days[];
extern int _lpdays[];

#ifndef _TIME_T_DEFINED
typedef long time_t;        /* time value */
#define _TIME_T_DEFINED     /* avoid multiple def's of time_t */
#endif  /* _TIME_T_DEFINED */

#ifdef _MAC
extern time_t __cdecl  _gmtotime_t (int, int, int, int, int, int);
#endif  /* _MAC */

extern time_t __cdecl __loctotime_t(int, int, int, int, int, int, int);

#ifdef _TM_DEFINED
extern int __cdecl _isindst(struct tm *);
#endif  /* _TM_DEFINED */

extern void __cdecl __tzset(void);

extern int __cdecl _validdrive(unsigned);


/*
 * This variable is in the C start-up; the length must be kept synchronized
 * It is used by the *cenvarg.c modules
 */

extern char _acfinfo[]; /* "_C_FILE_INFO=" */

#define CFI_LENGTH  12  /* "_C_FILE_INFO" is 12 bytes long */


/* typedefs needed for subsequent prototypes */

#ifndef _SIZE_T_DEFINED
typedef unsigned int size_t;
#define _SIZE_T_DEFINED
#endif  /* _SIZE_T_DEFINED */

#ifndef _VA_LIST_DEFINED
#ifdef _M_ALPHA
typedef struct {
        char *a0;   /* pointer to first homed integer argument */
        int offset; /* byte offset of next parameter */
} va_list;
#else  /* _M_ALPHA */
typedef char *  va_list;
#endif  /* _M_ALPHA */
#define _VA_LIST_DEFINED
#endif  /* _VA_LIST_DEFINED */

/*
 * stdio internals
 */
#ifndef _FILE_DEFINED
struct _iobuf {
        char *_ptr;
        int   _cnt;
        char *_base;
        int   _flag;
        int   _file;
        int   _charbuf;
        int   _bufsiz;
        char *_tmpfname;
        };
typedef struct _iobuf FILE;
#define _FILE_DEFINED
#endif  /* _FILE_DEFINED */

#ifndef _MAC

#if !defined (_FILEX_DEFINED) && defined (_WINDOWS_)