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
  41 /* INTERNAL: Return formatted current time/date */
  42 char* msvcrt_get_current_time(char* out, const char* format)
  43 {
  44   static const MSVCRT_time_t bad_time = (MSVCRT_time_t)-1;
  45   time_t t;
  46   struct tm *_tm = NULL;
  47   char *retval = NULL;
  48
  49   if (time(&t) != bad_time && (_tm = localtime(&t)) &&
  50       strftime(out,9,format,_tm) == 8)
  51     retval = out;
  52   return retval;
  53 }
  54
  55 /**********************************************************************
  56  *              mktime (MSVCRT.@)
  57  */
  58 MSVCRT_time_t MSVCRT_mktime(struct MSVCRT_tm *t)
  59 {
  60   MSVCRT_time_t res;
  61   struct tm tm;
  62
  63   tm.tm_sec = t->tm_sec;
  64   tm.tm_min = t->tm_min;
  65   tm.tm_hour = t->tm_hour;
  66   tm.tm_mday = t->tm_mday;
  67   tm.tm_mon = t->tm_mon;
  68   tm.tm_year = t->tm_year;
  69   tm.tm_isdst = t->tm_isdst;
  70   res = mktime(&tm);
  71   if (res != -1)
  72   {
  73       t->tm_sec = tm.tm_sec;
  74       t->tm_min = tm.tm_min;
  75       t->tm_hour = tm.tm_hour;
  76       t->tm_mday = tm.tm_mday;
  77       t->tm_mon = tm.tm_mon;
  78       t->tm_year = tm.tm_year;
  79       t->tm_isdst = tm.tm_isdst;
  80   }
  81   return res;
  82 }
  83
  84 /**********************************************************************
  85  *              _strdate (MSVCRT.@)
  86  */
  87 char* _strdate(char* date)
  88 {
  89   return msvcrt_get_current_time(date,"%m/%d/%y");
  90 }
  91
  92 /*********************************************************************
  93  *              _strtime (MSVCRT.@)
  94  */
  95 char* _strtime(char* date)
  96 {
  97   return msvcrt_get_current_time(date,"%H:%M:%S");
  98 }
  99
 100 /*********************************************************************
 101  *              clock (MSVCRT.@)
 102  */
 103 MSVCRT_clock_t MSVCRT_clock(void)
 104 {
 105   struct tms alltimes;
 106   clock_t res;
 107
 108   times(&alltimes);
 109   res = alltimes.tms_utime + alltimes.tms_stime +
 110         alltimes.tms_cutime + alltimes.tms_cstime;
 111   /* FIXME: We need some symbolic representation for CLOCKS_PER_SEC,
 112    *  10 holds only for Windows/Linux_i86)
 113    */
 114   return 10*res;
 115 }
 116
 117 /*********************************************************************
 118  *              difftime (MSVCRT.@)
 119  */
 120 double MSVCRT_difftime(MSVCRT_time_t time1, MSVCRT_time_t time2)
 121 {
 122     return (double)(time1 - time2);
 123 }
 124
 125 /*********************************************************************
 126  *              time (MSVCRT.@)
 127  */
 128 MSVCRT_time_t MSVCRT_time(MSVCRT_time_t* buf)
 129 {
 130   MSVCRT_time_t curtime = time(NULL);
 131   return buf ? *buf = curtime : curtime;
 132 }
 133
 134 /*********************************************************************
 135  *              _ftime (MSVCRT.@)
 136  */
 137 void _ftime(struct _timeb *buf)
 138 {
 139   buf->time = MSVCRT_time(NULL);
 140   buf->millitm = 0; /* FIXME */
 141   buf->timezone = 0;
 142   buf->dstflag = 0;
 143 }