reactos/lib/sdk/crt/time_new/localtime.c

   1 /*
   2  * COPYRIGHT:   LGPL, See LGPL.txt in the top level directory
   3  * PROJECT:     ReactOS CRT library
   4  * FILE:        lib/sdk/crt/time/localtime.c
   5  * PURPOSE:     Implementation of localtime, localtime_s
   6  * PROGRAMERS:  Timo Kreuzer
   7  */
   8 #include <precomp.h>
   9 #include <time.h>
  10 #include "bitsfixup.h"
  11
  12 errno_t
  13 localtime_s(struct tm* _tm, const time_t *ptime)
  14 {
  15
  16     /* Validate parameters */
  17     if (!_tm || !ptime)
  18     {
  19 #if 0
  20         _invalid_parameter(NULL,
  21                            0,//__FUNCTION__,
  22                            _CRT_WIDE(__FILE__),
  23                            __LINE__,
  24                            0);
  25 #endif
  26         return EINVAL;
  27     }
  28
  29
  30     return 0;
  31 }
  32
  33 extern char _tz_is_set;
  34
  35 struct tm *
  36 localtime(const time_t *ptime)
  37 {
  38     time_t time = *ptime;
  39     struct tm * ptm;
  40
  41     /* Check for invalid time value */
  42     if (time < 0)
  43     {
  44         return 0;
  45     }
  46
  47     /* Never without */
  48     if (!_tz_is_set)
  49         _tzset();
  50
  51     /* Check for overflow */
  52
  53     /* Correct for timezone */
  54     time -= _timezone;
  55 #if 0
  56     /* Correct for daylight saving */
  57     if (_isdstime(time))
  58     {
  59         ptm->tm_isdst = 1;
  60         time -= _dstbias;
  61     }
  62 #endif
  63     ptm = gmtime(&time);
  64
  65     return ptm;
  66 }
  67