mingw/include/time.h

   1 /*
   2  * time.h
   3  * This file has no copyright assigned and is placed in the Public Domain.
   4  * This file is a part of the mingw-runtime package.
   5  * No warranty is given; refer to the file DISCLAIMER within the package.
   6  *
   7  * Date and time functions and types.
   8  *
   9  */
  10
  11 #ifndef _TIME_H_
  12 #define _TIME_H_
  13
  14 /* All the headers include this file. */
  15 #include <_mingw.h>
  16
  17 #define __need_wchar_t
  18 #define __need_size_t
  19 #define __need_NULL
  20 #ifndef RC_INVOKED
  21 #include <stddef.h>
  22 #endif  /* Not RC_INVOKED */
  23
  24 /*
  25  * Number of clock ticks per second. A clock tick is the unit by which
  26  * processor time is measured and is returned by 'clock'.
  27  */
  28 #define CLOCKS_PER_SEC  ((clock_t)1000)
  29 #define CLK_TCK         CLOCKS_PER_SEC
  30
  31
  32 #ifndef RC_INVOKED
  33
  34 /*
  35  * A type for storing the current time and date. This is the number of
  36  * seconds since midnight Jan 1, 1970.
  37  * NOTE: This is also defined in non-ISO sys/types.h.
  38  */
  39 #ifndef _TIME_T_DEFINED
  40 typedef long    time_t;
  41 #define _TIME_T_DEFINED
  42 #endif
  43
  44 #ifndef __STRICT_ANSI__
  45 /* A 64-bit time_t to get to Y3K */
  46 #ifndef _TIME64_T_DEFINED
  47 typedef __int64 __time64_t;
  48 #define _TIME64_T_DEFINED
  49 #endif
  50 #endif
  51 /*
  52  * A type for measuring processor time (in clock ticks).
  53  */
  54 #ifndef _CLOCK_T_DEFINED
  55 typedef long    clock_t;
  56 #define _CLOCK_T_DEFINED
  57 #endif
  58
  59 #ifndef _TM_DEFINED
  60 /*
  61  * A structure for storing all kinds of useful information about the
  62  * current (or another) time.
  63  */
  64 struct tm
  65 {
  66         int     tm_sec;         /* Seconds: 0-59 (K&R says 0-61?) */
  67         int     tm_min;         /* Minutes: 0-59 */
  68         int     tm_hour;        /* Hours since midnight: 0-23 */
  69         int     tm_mday;        /* Day of the month: 1-31 */
  70         int     tm_mon;         /* Months *since* january: 0-11 */
  71         int     tm_year;        /* Years since 1900 */
  72         int     tm_wday;        /* Days since Sunday (0-6) */
  73         int     tm_yday;        /* Days since Jan. 1: 0-365 */
  74         int     tm_isdst;       /* +1 Daylight Savings Time, 0 No DST,
  75                                  * -1 don't know */
  76 };
  77 #define _TM_DEFINED
  78 #endif
  79
  80 #ifdef  __cplusplus
  81 extern "C" {
  82 #endif
  83
  84 _CRTIMP clock_t __cdecl clock (void);
  85 _CRTIMP time_t __cdecl  time (time_t*);
  86 _CRTIMP double __cdecl  difftime (time_t, time_t);
  87 _CRTIMP time_t __cdecl  mktime (struct tm*);
  88
  89 /*
  90  * These functions write to and return pointers to static buffers that may
  91  * be overwritten by other function calls. Yikes!
  92  *
  93  * NOTE: localtime, and perhaps the others of the four functions grouped
  94  * below may return NULL if their argument is not 'acceptable'. Also note
  95  * that calling asctime with a NULL pointer will produce an Invalid Page
  96  * Fault and crap out your program. Guess how I know. Hint: stat called on
  97  * a directory gives 'invalid' times in st_atime etc...
  98  */
  99 _CRTIMP char* __cdecl           asctime (const struct tm*);
 100 _CRTIMP char* __cdecl           ctime (const time_t*);
 101 _CRTIMP struct tm*  __cdecl     gmtime (const time_t*);
 102 _CRTIMP struct tm*  __cdecl     localtime (const time_t*);
 103
 104 _CRTIMP size_t __cdecl          strftime (char*, size_t, const char*, const struct tm*);
 105
 106 #ifndef __STRICT_ANSI__
 107
 108 extern _CRTIMP void __cdecl     _tzset (void);
 109
 110 #ifndef _NO_OLDNAMES
 111 extern _CRTIMP void __cdecl     tzset (void);
 112 #endif
 113
 114 _CRTIMP char* __cdecl   _strdate(char*);
 115 _CRTIMP char* __cdecl   _strtime(char*);
 116
 117 /* These require newer versions of msvcrt.dll (6.10 or higher). */
 118 #if __MSVCRT_VERSION__ >= 0x0601
 119 _CRTIMP __time64_t __cdecl  _time64( __time64_t*);
 120 _CRTIMP __time64_t __cdecl  _mktime64 (struct tm*);
 121 _CRTIMP char* __cdecl _ctime64 (const __time64_t*);
 122 _CRTIMP struct tm*  __cdecl _gmtime64 (const __time64_t*);
 123 _CRTIMP struct tm*  __cdecl _localtime64 (const __time64_t*);
 124 #endif /* __MSVCRT_VERSION__ >= 0x0601 */
 125
 126 /*
 127  * _daylight: non zero if daylight savings time is used.
 128  * _timezone: difference in seconds between GMT and local time.
 129  * _tzname: standard/daylight savings time zone names (an array with two
 130  *          elements).
 131  */
 132 #ifdef __MSVCRT__
 133
 134 /* These are for compatibility with pre-VC 5.0 suppied MSVCRT. */
 135 extern _CRTIMP int* __cdecl     __p__daylight (void);
 136 extern _CRTIMP long* __cdecl    __p__timezone (void);
 137 extern _CRTIMP char** __cdecl   __p__tzname (void);
 138
 139 __MINGW_IMPORT int      _daylight;
 140 __MINGW_IMPORT long     _timezone;
 141 __MINGW_IMPORT char     *_tzname[2];
 142
 143 #else /* not __MSVCRT (ie. crtdll) */
 144
 145 #ifndef __DECLSPEC_SUPPORTED
 146
 147 extern int*     _imp___daylight_dll;
 148 extern long*    _imp___timezone_dll;
 149 extern char**   _imp___tzname;
 150
 151 #define _daylight       (*_imp___daylight_dll)
 152 #define _timezone       (*_imp___timezone_dll)
 153 #define _tzname         (*_imp___tzname)
 154
 155 #else /* __DECLSPEC_SUPPORTED */
 156
 157 __MINGW_IMPORT int      _daylight_dll;
 158 __MINGW_IMPORT long     _timezone_dll;
 159 __MINGW_IMPORT char*    _tzname[2];
 160
 161 #define _daylight       _daylight_dll
 162 #define _timezone       _timezone_dll
 163
 164 #endif /* __DECLSPEC_SUPPORTED */
 165
 166 #endif /* not __MSVCRT__ */
 167
 168 #ifndef _NO_OLDNAMES
 169
 170 #ifdef __MSVCRT__
 171
 172 /* These go in the oldnames import library for MSVCRT. */
 173 __MINGW_IMPORT int      daylight;
 174 __MINGW_IMPORT long     timezone;
 175 __MINGW_IMPORT char     *tzname[2];
 176
 177 #else /* not __MSVCRT__ */
 178
 179 /* CRTDLL is royally messed up when it comes to these macros.
 180    TODO: import and alias these via oldnames import library instead
 181    of macros.  */
 182
 183 #define daylight        _daylight
 184 /* NOTE: timezone not defined as macro because it would conflict with
 185    struct timezone in sys/time.h.
 186    Also, tzname used to a be macro, but now it's in moldname. */
 187 __MINGW_IMPORT char     *tzname[2];
 188
 189 #endif /* not __MSVCRT__ */
 190
 191 #endif  /* Not _NO_OLDNAMES */
 192 #endif  /* Not __STRICT_ANSI__ */
 193
 194 #ifndef _WTIME_DEFINED
 195 /* wide function prototypes, also declared in wchar.h */
 196 #ifndef __STRICT_ANSI__
 197 #ifdef __MSVCRT__
 198 _CRTIMP wchar_t* __cdecl        _wasctime(const struct tm*);
 199 _CRTIMP wchar_t* __cdecl        _wctime(const time_t*);
 200 _CRTIMP wchar_t* __cdecl        _wstrdate(wchar_t*);
 201 _CRTIMP wchar_t* __cdecl        _wstrtime(wchar_t*);
 202 #if __MSVCRT_VERSION__ >= 0x0601
 203 _CRTIMP wchar_t* __cdecl        _wctime64 (const __time64_t*);
 204 #endif
 205 #endif /*  __MSVCRT__ */
 206 #endif /* __STRICT_ANSI__ */
 207 _CRTIMP size_t __cdecl          wcsftime (wchar_t*, size_t, const wchar_t*, const struct tm*);
 208 #define _WTIME_DEFINED
 209 #endif /* _WTIME_DEFINED */
 210
 211 #ifdef  __cplusplus
 212 }
 213 #endif
 214
 215 #endif  /* Not RC_INVOKED */
 216
 217 #endif  /* Not _TIME_H_ */
 218