stdio.h

C语言库函数的原型,有用的拿去

/***
*stdio.h - definitions/declarations for standard I/O routines
*
*       Copyright (c) Microsoft Corporation. All rights reserved.
*
*Purpose:
*       This file defines the structures, values, macros, and functions
*       used by the level 2 I/O ("standard I/O") routines.
*       [ANSI/System V]
*
*       [Public]
*
****/

#pragma once

#ifndef _INC_STDIO
#define _INC_STDIO

#include <crtdefs.h>

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

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


/* Buffered I/O macros */

#define BUFSIZ  512

#ifndef _INTERNAL_IFSTRIP_
/*
 * Real default size for stdio buffers
 */
#define _INTERNAL_BUFSIZ    4096
#define _SMALL_BUFSIZ       512
#endif  /* _INTERNAL_IFSTRIP_ */

/*
 * Default number of supported streams. _NFILE is confusing and obsolete, but
 * supported anyway for backwards compatibility.
 */
#define _NFILE      _NSTREAM_

#define _NSTREAM_   512

/*
 * Number of entries in _iob[] (declared below). Note that _NSTREAM_ must be
 * greater than or equal to _IOB_ENTRIES.
 */
#define _IOB_ENTRIES 20

#define EOF     (-1)


#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 */


/* Directory where temporary files may be created. */

#define _P_tmpdir   "\\"
#define _wP_tmpdir  L"\\"

/* L_tmpnam = length of string _P_tmpdir
 *            + 1 if _P_tmpdir does not end in "/" or "\", else 0
 *            + 12 (for the filename string)
 *            + 1 (for the null terminator)
 * L_tmpnam_s = length of string _P_tmpdir
 *            + 1 if _P_tmpdir does not end in "/" or "\", else 0
 *            + 16 (for the filename string)
 *            + 1 (for the null terminator)
 */
#define L_tmpnam   (sizeof(_P_tmpdir) + 12)
#if __STDC_WANT_SECURE_LIB__
#define L_tmpnam_s (sizeof(_P_tmpdir) + 16)
#endif  /* __STDC_WANT_SECURE_LIB__ */



/* Seek method constants */

#define SEEK_CUR    1
#define SEEK_END    2
#define SEEK_SET    0


#define FILENAME_MAX    260
#define FOPEN_MAX       20
#define _SYS_OPEN       20
#define TMP_MAX         32767  /* SHRT_MAX */
#if __STDC_WANT_SECURE_LIB__
#define TMP_MAX_S       _TMP_MAX_S
#define _TMP_MAX_S      2147483647 /* INT_MAX */
#endif  /* __STDC_WANT_SECURE_LIB__ */

/* Define NULL pointer value */
#ifndef NULL
#ifdef __cplusplus
#define NULL    0
#else  /* __cplusplus */
#define NULL    ((void *)0)
#endif  /* __cplusplus */
#endif  /* NULL */

/* Declare _iob[] array */

#ifndef _STDIO_DEFINED
#ifndef _INTERNAL_IFSTRIP_
/* These functions are for enabling STATIC_CPPLIB functionality */
#if defined (_DLL) && defined (_M_IX86)
/* Retained for compatibility with VC++ 5.0 and earlier versions */
_CRTIMP extern FILE * __cdecl __p__iob(void);
#endif  /* defined (_DLL) && defined (_M_IX86) */
#ifndef _M_CEE_PURE
_CRTIMP extern FILE _iob[];
#endif  /* _M_CEE_PURE */
#endif  /* _INTERNAL_IFSTRIP_ */
_CRTIMP FILE * __cdecl __iob_func(void);
#endif  /* _STDIO_DEFINED */


/* Define file position type */

#ifndef _FPOS_T_DEFINED
#undef _FPOSOFF


#if !__STDC__
/* At this point we could switch both to long long, but we won't do that till next version to avoid any potential compat issues */
typedef __int64 fpos_t;
#define _FPOSOFF(fp) ((long)(fp))
#else  /* !__STDC__ */
typedef long long fpos_t;
#define _FPOSOFF(fp) ((long)(fp))
#endif  /* !__STDC__ */

#define _FPOS_T_DEFINED
#endif  /* _FPOS_T_DEFINED */

#ifndef _STDSTREAM_DEFINED
#define stdin  (&__iob_func()[0])
#define stdout (&__iob_func()[1])
#define stderr (&__iob_func()[2])
#define _STDSTREAM_DEFINED
#endif  /* _STDSTREAM_DEFINED */

#define _IOREAD         0x0001
#define _IOWRT          0x0002

#define _IOFBF          0x0000
#define _IOLBF          0x0040
#define _IONBF          0x0004

#define _IOMYBUF        0x0008
#define _IOEOF          0x0010
#define _IOERR          0x0020
#define _IOSTRG         0x0040
#define _IORW           0x0080

/* constants used by _set_output_format */
#define _TWO_DIGIT_EXPONENT 0x1

/* Function prototypes */