stdlib.h

C标准库源代码

/***
*stdlib.h - declarations/definitions for commonly used library functions
*
*       Copyright (c) 1985-1997, Microsoft Corporation. All rights reserved.
*
*Purpose:
*       This include file contains the function declarations for commonly
*       used library functions which either don't fit somewhere else, or,
*       cannot be declared in the normal place for other reasons.
*       [ANSI]
*
*       [Public]
*
****/

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

#ifndef _INC_STDLIB
#define _INC_STDLIB

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


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


/* Define NULL pointer value */

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


/* Definition of the argument values for the exit() function */

#define EXIT_SUCCESS    0
#define EXIT_FAILURE    1


#ifndef _ONEXIT_T_DEFINED
typedef int (__cdecl * _onexit_t)(void);
#if !__STDC__
/* Non-ANSI name for compatibility */
#define onexit_t _onexit_t
#endif  /* !__STDC__ */
#define _ONEXIT_T_DEFINED
#endif  /* _ONEXIT_T_DEFINED */


/* Data structure definitions for div and ldiv runtimes. */

#ifndef _DIV_T_DEFINED

typedef struct _div_t {
        int quot;
        int rem;
} div_t;

typedef struct _ldiv_t {
        long quot;
        long rem;
} ldiv_t;

#define _DIV_T_DEFINED
#endif  /* _DIV_T_DEFINED */


/* Maximum value that can be returned by the rand function. */

#define RAND_MAX 0x7fff

/*
 * Maximum number of bytes in multi-byte character in the current locale
 * (also defined in ctype.h).
 */
#ifndef MB_CUR_MAX
#ifndef _INTERNAL_IFSTRIP_
#if defined (_DLL) && defined (_M_IX86)
/* Retained for compatibility with VC++ 5.0 and earlier versions */
_CRTIMP int * __cdecl __p___mb_cur_max(void);
#endif  /* defined (_DLL) && defined (_M_IX86) */
#endif  /* _INTERNAL_IFSTRIP_ */
#define MB_CUR_MAX __mb_cur_max
_CRTIMP extern int __mb_cur_max;
#endif  /* MB_CUR_MAX */


/* Minimum and maximum macros */

#define __max(a,b)  (((a) > (b)) ? (a) : (b))
#define __min(a,b)  (((a) < (b)) ? (a) : (b))

/*
 * Sizes for buffers used by the _makepath() and _splitpath() functions.
 * note that the sizes include space for 0-terminator
 */
#ifndef _MAC
#define _MAX_PATH   260 /* max. length of full pathname */
#define _MAX_DRIVE  3   /* max. length of drive component */
#define _MAX_DIR    256 /* max. length of path component */
#define _MAX_FNAME  256 /* max. length of file name component */
#define _MAX_EXT    256 /* max. length of extension component */
#else  /* _MAC */
#define _MAX_PATH   256 /* max. length of full pathname */
#define _MAX_DIR    32  /* max. length of path component */
#define _MAX_FNAME  64  /* max. length of file name component */
#endif  /* _MAC */

/*
 * Argument values for _set_error_mode().
 */
#define _OUT_TO_DEFAULT 0
#define _OUT_TO_STDERR  1
#define _OUT_TO_MSGBOX  2
#define _REPORT_ERRMODE 3


/* External variable declarations */

#if (defined (_MT) || defined (_DLL)) && !defined (_MAC)
_CRTIMP int * __cdecl _errno(void);
_CRTIMP unsigned long * __cdecl __doserrno(void);
#define errno       (*_errno())
#define _doserrno   (*__doserrno())
#else  /* (defined (_MT) || defined (_DLL)) && !defined (_MAC) */
_CRTIMP extern int errno;               /* XENIX style error number */
_CRTIMP extern unsigned long _doserrno; /* OS system error value */
#endif  /* (defined (_MT) || defined (_DLL)) && !defined (_MAC) */


#ifdef _MAC
_CRTIMP extern int  _macerrno;          /* OS system error value */
#endif  /* _MAC */


_CRTIMP extern char * _sys_errlist[];   /* perror error message table */
_CRTIMP extern int _sys_nerr;           /* # of entries in sys_errlist table */


#if defined (_DLL) && defined (_M_IX86)

#define __argc      (*__p___argc())     /* count of cmd line args */
#define __argv      (*__p___argv())     /* pointer to table of cmd line args */
#define __wargv     (*__p___wargv())    /* pointer to table of wide cmd line args */
#define _environ    (*__p__environ())   /* pointer to environment table */
#ifndef _MAC
#define _wenviron   (*__p__wenviron())  /* pointer to wide environment table */
#endif  /* _MAC */
#define _pgmptr     (*__p__pgmptr())    /* points to the module (EXE) name */
#ifndef _MAC
#define _wpgmptr    (*__p__wpgmptr())   /* points to the module (EXE) wide name */
#endif  /* _MAC */

_CRTIMP int *          __cdecl __p___argc(void);
_CRTIMP char ***       __cdecl __p___argv(void);
_CRTIMP wchar_t ***    __cdecl __p___wargv(void);
_CRTIMP char ***       __cdecl __p__environ(void);
_CRTIMP wchar_t ***    __cdecl __p__wenviron(void);
_CRTIMP char **        __cdecl __p__pgmptr(void);
_CRTIMP wchar_t **     __cdecl __p__wpgmptr(void);

#ifndef _INTERNAL_IFSTRIP_
/* Retained for compatibility with VC++ 5.0 and earlier versions */
_CRTIMP int *          __cdecl __p__fmode(void);
_CRTIMP int *          __cdecl __p__fileinfo(void);
_CRTIMP unsigned int * __cdecl __p__osver(void);
_CRTIMP unsigned int * __cdecl __p__winver(void);
_CRTIMP unsigned int * __cdecl __p__winmajor(void);
_CRTIMP unsigned int * __cdecl __p__winminor(void);
#endif  /* _INTERNAL_IFSTRIP_ */

#else  /* defined (_DLL) && defined (_M_IX86) */

_CRTIMP extern int __argc;          /* count of cmd line args */
_CRTIMP extern char ** __argv;      /* pointer to table of cmd line args */
#ifndef _MAC
_CRTIMP extern wchar_t ** __wargv;  /* pointer to table of wide cmd line args */
#endif  /* _MAC */

_CRTIMP extern char ** _environ;    /* pointer to environment table */
#ifndef _MAC
_CRTIMP extern wchar_t ** _wenviron;    /* pointer to wide environment table */