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 <time.h>
  25 #include <sys/times.h>
  26
  27 #include "msvcrt.h"
  28 #include "msvcrt/sys/timeb.h"
  29 #include "msvcrt/time.h"
  30
  31
  32 #include "wine/debug.h"
  33
  34 WINE_DEFAULT_DEBUG_CHANNEL(msvcrt);
  35
  36
  37 /* INTERNAL: Return formatted current time/date */
  38 char* msvcrt_get_current_time(char* out, const char* format)
  39 {
  40   static const MSVCRT_time_t bad_time = (MSVCRT_time_t)-1;
  41   time_t t;
  42   struct tm *_tm = NULL;
  43   char *retval = NULL;
  44
  45   if (time(&t) != bad_time && (_tm = localtime(&t)) &&
  46       strftime(out,9,format,_tm) == 8)
  47     retval = out;
  48   return retval;
  49 }
  50
  51 /**********************************************************************
  52  *              mktime (MSVCRT.@)
  53  */
  54 MSVCRT_time_t MSVCRT_mktime(struct MSVCRT_tm *t)
  55 {
  56   MSVCRT_time_t res;
  57   struct tm tm;
  58
  59   tm.tm_sec = t->tm_sec;
  60   tm.tm_min = t->tm_min;
  61   tm.tm_hour = t->tm_hour;
  62   tm.tm_mday = t->tm_mday;
  63   tm.tm_mon = t->tm_mon;
  64   tm.tm_year = t->tm_year;
  65   tm.tm_isdst = t->tm_isdst;
  66   res = mktime(&tm);
  67   if (res != -1)
  68   {
  69       t->tm_sec = tm.tm_sec;
  70       t->tm_min = tm.tm_min;
  71       t->tm_hour = tm.tm_hour;
  72       t->tm_mday = tm.tm_mday;
  73       t->tm_mon = tm.tm_mon;
  74       t->tm_year = tm.tm_year;
  75       t->tm_isdst = tm.tm_isdst;
  76   }
  77   return res;
  78 }
  79
  80 /**********************************************************************
  81  *              _strdate (MSVCRT.@)
  82  */
  83 char* _strdate(char* date)
  84 {
  85   return msvcrt_get_current_time(date,"%m/%d/%y");
  86 }
  87
  88 /*********************************************************************
  89  *              _strtime (MSVCRT.@)
  90  */
  91 char* _strtime(char* date)
  92 {
  93   return msvcrt_get_current_time(date,"%H:%M:%S");
  94 }
  95
  96 /*********************************************************************
  97  *              clock (MSVCRT.@)
  98  */
  99 MSVCRT_clock_t MSVCRT_clock(void)
 100 {
 101   struct tms alltimes;
 102   clock_t res;
 103
 104   times(&alltimes);
 105   res = alltimes.tms_utime + alltimes.tms_stime +
 106         alltimes.tms_cutime + alltimes.tms_cstime;
 107   /* FIXME: We need some symbolic representation for CLOCKS_PER_SEC,
 108    *  10 holds only for Windows/Linux_i86)
 109    */
 110   return 10*res;
 111 }
 112
 113 /*********************************************************************
 114  *              difftime (MSVCRT.@)
 115  */
 116 double MSVCRT_difftime(MSVCRT_time_t time1, MSVCRT_time_t time2)
 117 {
 118     return (double)(time1 - time2);
 119 }
 120
 121 /*********************************************************************
 122  *              time (MSVCRT.@)
 123  */
 124 MSVCRT_time_t MSVCRT_time(MSVCRT_time_t* buf)
 125 {
 126   MSVCRT_time_t curtime = time(NULL);
 127   return buf ? *buf = curtime : curtime;
 128 }
 129
 130 /*********************************************************************
 131  *              _ftime (MSVCRT.@)
 132  */
 133 void _ftime(struct _timeb *buf)
 134 {
 135   buf->time = MSVCRT_time(NULL);
 136   buf->millitm = 0; /* FIXME */
 137   buf->timezone = 0;
 138   buf->dstflag = 0;
 139 }