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

   1 /*
   2  * COPYRIGHT:   See COPYING 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         _invalid_parameter(NULL,
  20                            0,//__FUNCTION__,
  21                            _CRT_WIDE(__FILE__),
  22                            __LINE__,
  23                            0);
  24         return EINVAL;
  25     }
  26
  27
  28     return 0;
  29 }
  30
  31 extern char _tz_is_set;
  32
  33 struct tm *
  34 localtime(const time_t *ptime)
  35 {
  36     time_t time = *ptime;
  37     struct tm * ptm;
  38
  39     /* Check for invalid time value */
  40     if (time < 0)
  41     {
  42         return 0;
  43     }
  44
  45     /* Never without */
  46     if (!_tz_is_set)
  47         _tzset();
  48
  49     /* Check for overflow */
  50
  51     /* Correct for timezone */
  52     time -= _timezone;
  53 #if 0
  54     /* Correct for daylight saving */
  55     if (_isdstime(time))
  56     {
  57         ptm->tm_isdst = 1;
  58         time -= _dstbias;
  59     }
  60 #endif
  61     ptm = gmtime(&time);
  62
  63     return ptm;
  64 }
  65