dlls/msvcrt/time.c

   1 /*
   2  * msvcrt.dll date/time functions
   3  *
   4  * Copyright 1996,1998 Marcus Meissner
   5  * Copyright 1996 Jukka Iivonen
   6  * Copyright 1997,2000 Uwe Bonnes
   7  * Copyright 2000 Jon Griffiths
   8  *
   9  * This library is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2.1 of the License, or (at your option) any later version.
  13  *
  14  * This library is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with this library; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  22  */
  23
  24 #include "config.h"
  25
  26 #include <time.h>
  27 #ifdef HAVE_SYS_TIMES_H
  28 # include <sys/times.h>
  29 #endif
  30
  31 #include "msvcrt.h"
  32 #include "msvcrt/sys/timeb.h"
  33 #include "msvcrt/time.h"
  34
  35
  36 #include "wine/debug.h"
  37
  38 WINE_DEFAULT_DEBUG_CHANNEL(msvcrt);
  39
  40 /* INTERNAL: Return formatted current time/date */
  41 char* msvcrt_get_current_time(char* out, const char* format)
  42 {
  43   static const MSVCRT_time_t bad_time = (MSVCRT_time_t)-1;
  44   time_t t;
  45   struct tm *_tm = NULL;
  46   char *retval = NULL;
  47
  48   if (time(&t) != bad_time && (_tm = localtime(&t)) &&
  49       strftime(out,9,format,_tm) == 8)
  50     retval = out;
  51   return retval;
  52 }
  53
  54 /**********************************************************************
  55  *              mktime (MSVCRT.@)
  56  */
  57 MSVCRT_time_t MSVCRT_mktime(struct MSVCRT_tm *t)
  58 {
  59   MSVCRT_time_t res;
  60   struct tm tm;
  61
  62   tm.tm_sec = t->tm_sec;
  63   tm.tm_min = t->tm_min;
  64   tm.tm_hour = t->tm_hour;
  65   tm.tm_mday = t->tm_mday;
  66   tm.tm_mon = t->tm_mon;
  67   tm.tm_year = t->tm_year;
  68   tm.tm_isdst = t->tm_isdst;
  69   res = mktime(&tm);
  70   if (res != -1)
  71   {
  72       t->tm_sec = tm.tm_sec;
  73       t->tm_min = tm.tm_min;
  74       t->tm_hour = tm.tm_hour;
  75       t->tm_mday = tm.tm_mday;
  76       t->tm_mon = tm.tm_mon;
  77       t->tm_year = tm.tm_year;
  78       t->tm_isdst = tm.tm_isdst;
  79   }
  80   return res;
  81 }
  82
  83 /**********************************************************************
  84  *              _strdate (MSVCRT.@)
  85  */
  86 char* _strdate(char* date)
  87 {
  88   return msvcrt_get_current_time(date,"%m/%d/%y");
  89 }
  90
  91 /*********************************************************************
  92  *              _strtime (MSVCRT.@)
  93  */
  94 char* _strtime(char* date)
  95 {
  96   return msvcrt_get_current_time(date,"%H:%M:%S");
  97 }
  98
  99 /*********************************************************************
 100  *              clock (MSVCRT.@)
 101  */
 102 MSVCRT_clock_t MSVCRT_clock(void)
 103 {
 104   struct tms alltimes;
 105   clock_t res;
 106
 107   times(&alltimes);
 108   res = alltimes.tms_utime + alltimes.tms_stime +
 109         alltimes.tms_cutime + alltimes.tms_cstime;
 110   /* FIXME: We need some symbolic representation for CLOCKS_PER_SEC,
 111    *  10 holds only for Windows/Linux_i86)
 112    */
 113   return 10*res;
 114 }
 115
 116 /*********************************************************************
 117  *              difftime (MSVCRT.@)
 118  */
 119 double MSVCRT_difftime(MSVCRT_time_t time1, MSVCRT_time_t time2)
 120 {
 121     return (double)(time1 - time2);
 122 }
 123
 124 /*********************************************************************
 125  *              time (MSVCRT.@)
 126  */
 127 MSVCRT_time_t MSVCRT_time(MSVCRT_time_t* buf)
 128 {
 129   MSVCRT_time_t curtime = time(NULL);
 130   return buf ? *buf = curtime : curtime;
 131 }
 132
 133 /*********************************************************************
 134  *              _ftime (MSVCRT.@)
 135  */
 136 void _ftime(struct _timeb *buf)
 137 {
 138   buf->time = MSVCRT_time(NULL);
 139   buf->millitm = 0; /* FIXME */
 140   buf->timezone = 0;
 141   buf->dstflag = 0;
 142 }
 143
 144 /*********************************************************************
 145  *              _daylight (MSVCRT.@)
 146  */
 147 int MSVCRT___daylight = 1; /* FIXME: assume daylight */
 148
 149 /*********************************************************************
 150  *              __p_daylight (MSVCRT.@)
 151  */
 152 void *MSVCRT___p__daylight(void)
 153 {
 154         return &MSVCRT___daylight;
 155 }