mktime.c File Reference

#include <precomp.h>
#include "bitsfixup.h"

Include dependency graph for mktime.c:

Go to the source code of this file.

Macros
#define	MAX_32BIT_TIME   0xFFFFFFFFULL

Functions
__time64_t	mktime_worker (struct tm *ptm, int utc)
_mkgmtime
time_t	_mkgmtime (struct tm *ptm)
time_t	mktime (struct tm *ptm)
__time32_t	_mkgmtime32 (struct tm *ptm)
__time32_t	_mktime32 (struct tm *ptm)
__time64_t	_mkgmtime64 (struct tm *ptm)
__time64_t	_mktime64 (struct tm *ptm)

Variables
static int	g_monthdays [13] = {0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365}

Macro Definition Documentation

MAX_32BIT_TIME

#define MAX_32BIT_TIME   0xFFFFFFFFULL

Definition at line 11 of file mktime.c.

Function Documentation

_mkgmtime()

time_t _mkgmtime

(

struct tm *

ptm

)

Definition at line 114 of file mktime.c.

{
    __time64_t time = mktime_worker(ptm, 1);
    return (time_t)((time > MAX_32BIT_TIME) ? -1 : time);
}

_mkgmtime32()

__time32_t _mkgmtime32

(

struct tm *

ptm

)

Definition at line 128 of file mktime.c.

{
    __time64_t time = mktime_worker(ptm, 1);
    return (__time32_t)((time > MAX_32BIT_TIME) ? -1 : time);
}

_mkgmtime64()

__time64_t _mkgmtime64

(

struct tm *

ptm

)

Definition at line 142 of file mktime.c.

{
    return mktime_worker(ptm, 1);
}

Referenced by _mkgmtime().

_mktime32()

__time32_t _mktime32

(

struct tm *

ptm

)

Definition at line 135 of file mktime.c.

{
    __time64_t time = mktime_worker(ptm, 0);
    return (__time32_t)((time > MAX_32BIT_TIME) ? -1 : time);
}

_mktime64()

__time64_t _mktime64

(

struct tm *

ptm

)

Definition at line 148 of file mktime.c.

{
    return mktime_worker(ptm, 0);
}

Referenced by ATL::CTime::CTime(), and mktime().

mktime()

time_t mktime

(

struct tm *

ptm

)

Definition at line 121 of file mktime.c.

{
    __time64_t time = mktime_worker(ptm, 0);
    return (time_t)((time > MAX_32BIT_TIME) ? -1 : time);
}

mktime_worker()

__time64_t mktime_worker	(	struct tm *	ptm,
		int	utc
	)

Definition at line 16 of file mktime.c.

{
    struct tm *ptm2;
    __time64_t time;
    int mons, years, leapyears;
    TIME_ZONE_INFORMATION tzi;
    DWORD ret;
 
    /* Normalize year and month */
    if (ptm->tm_mon < 0)
    {
        mons = -ptm->tm_mon - 1;
        ptm->tm_year -= 1 + mons / 12;
        ptm->tm_mon = 11 - (mons % 12);
    }
    else if (ptm->tm_mon > 11)
    {
        mons = ptm->tm_mon;
        ptm->tm_year += (mons / 12);
        ptm->tm_mon = mons % 12;
    }
 
    /* Is it inside margins */
    if (ptm->tm_year < 70 || ptm->tm_year > 139) // FIXME: max year for 64 bits
    {
        return -1;
    }
 
    years = ptm->tm_year - 70;
 
    /* Number of leapyears passed since 1970 */
    leapyears = (years + 1) / 4;
 
    /* Calculate days up to 1st of Jan */
    time = years * 365 + leapyears;
 
    /* Calculate days up to 1st of month */
    time += g_monthdays[ptm->tm_mon];
 
    /* Check if we need to add a leap day */
    if (((years + 2) % 4) == 0)
    {
        if (ptm->tm_mon > 2)
        {
            time++;
        }
    }
 
    time += ptm->tm_mday - 1;
 
    time *= 24;
    time += ptm->tm_hour;
 
    time *= 60;
    time += ptm->tm_min;
 
    time *= 60;
    time += ptm->tm_sec;
 
    if (time < 0)
    {
        return -1;
    }
 
    /* Finally get normalized tm struct */
    ptm2 = _gmtime64(&time);
    if (!ptm2)
    {
        return -1;
    }
    *ptm = *ptm2;
 
    /* Finally adjust by the difference to GMT in seconds */
    ret = GetTimeZoneInformation(&tzi);
    if (ret != TIME_ZONE_ID_INVALID)
    {
        time += tzi.Bias * 60;
    }
 
    return time;
}

Referenced by _mkgmtime(), _mkgmtime32(), _mkgmtime64(), _mktime32(), _mktime64(), and mktime().

Variable Documentation

g_monthdays

int g_monthdays[13] = {0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365}

static

Definition at line 13 of file mktime.c.

Referenced by mktime_worker().