mirror of https://github.com/tongzx/nt5src
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
113 lines
3.2 KiB
113 lines
3.2 KiB
/***
|
|
*dtoxtm64.c - convert OS local time to __time64_t
|
|
*
|
|
* Copyright (c) 1998-2001, Microsoft Corporation. All rights reserved.
|
|
*
|
|
*Purpose:
|
|
* defines __loctotime64_t() - convert OS local time to internal format
|
|
* (__time64_t).
|
|
*
|
|
*Revision History:
|
|
* 05-21-98 GJF Created.
|
|
* 10-19-98 GJF Fill in tm_min and tm_sec before calling _isindst
|
|
*
|
|
*******************************************************************************/
|
|
|
|
#include <cruntime.h>
|
|
#include <time.h>
|
|
#include <ctime.h>
|
|
#include <internal.h>
|
|
|
|
/***
|
|
*__time64_t __loctotime64_t(yr, mo, dy, hr, mn, sc, dstflag) - converts OS
|
|
* local time to internal time format (i.e., a __time64_t value)
|
|
*
|
|
*Purpose:
|
|
* Converts a local time value, obtained in a broken down format from
|
|
* the host OS, to __time64_t format (i.e., the number elapsed seconds
|
|
* since 01-01-70, 00:00:00, UTC).
|
|
*
|
|
*Entry:
|
|
* int yr, mo, dy - date
|
|
* int hr, mn, sc - time
|
|
* int dstflag - 1 if Daylight Time, 0 if Standard Time, -1 if
|
|
* not specified.
|
|
*
|
|
*Exit:
|
|
* Returns calendar time value.
|
|
*
|
|
*Exceptions:
|
|
*
|
|
*******************************************************************************/
|
|
|
|
__time64_t __cdecl __loctotime64_t (
|
|
int yr, /* 0 based */
|
|
int mo, /* 1 based */
|
|
int dy, /* 1 based */
|
|
int hr,
|
|
int mn,
|
|
int sc,
|
|
int dstflag )
|
|
{
|
|
int tmpdays;
|
|
__time64_t tmptim;
|
|
struct tm tb;
|
|
|
|
/*
|
|
* Do a quick range check on the year and convert it to a delta
|
|
* off of 1900.
|
|
*/
|
|
if ( ((long)(yr -= 1900) < _BASE_YEAR) || ((long)yr > _MAX_YEAR64) )
|
|
return (__time64_t)(-1);
|
|
|
|
/*
|
|
* Compute the number of elapsed days in the current year.
|
|
*/
|
|
tmpdays = dy + _days[mo - 1];
|
|
if ( _IS_LEAP_YEAR(yr) && (mo > 2) )
|
|
tmpdays++;
|
|
|
|
/*
|
|
* Compute the number of elapsed seconds since the Epoch. Note the
|
|
* computation of elapsed leap years would break down after 2100
|
|
* if such values were in range (fortunately, they aren't).
|
|
*/
|
|
tmptim = /* 365 days for each year */
|
|
(((__time64_t)yr - _BASE_YEAR) * 365
|
|
|
|
/* one day for each elapsed leap year */
|
|
+ (__time64_t)_ELAPSED_LEAP_YEARS(yr)
|
|
|
|
/* number of elapsed days in yr */
|
|
+ tmpdays)
|
|
|
|
/* convert to hours and add in hr */
|
|
* 24 + hr;
|
|
|
|
tmptim = /* convert to minutes and add in mn */
|
|
(tmptim * 60 + mn)
|
|
|
|
/* convert to seconds and add in sec */
|
|
* 60 + sc;
|
|
/*
|
|
* Account for time zone.
|
|
*/
|
|
__tzset();
|
|
tmptim += _timezone;
|
|
|
|
/*
|
|
* Fill in enough fields of tb for _isindst(), then call it to
|
|
* determine DST.
|
|
*/
|
|
tb.tm_yday = tmpdays;
|
|
tb.tm_year = yr;
|
|
tb.tm_mon = mo - 1;
|
|
tb.tm_hour = hr;
|
|
tb.tm_min = mn;
|
|
tb.tm_sec = sc;
|
|
if ( (dstflag == 1) || ((dstflag == -1) && _daylight &&
|
|
_isindst(&tb)) )
|
|
tmptim += _dstbias;
|
|
return(tmptim);
|
|
}
|
|
|