timezone.c File Reference

#include "precomp.h"

Include dependency graph for timezone.c:

Go to the source code of this file.

Functions
void *	__p__daylight (void)
long *	__p__timezone (void)
long *	__p__dstbias (void)
char **	__p__tzname (void)
void	_tzset (void)
int CDECL	_get_tzname (size_t *ret, char *buf, size_t bufsize, int index)

Variables
char	_tz_is_set = 0
static char	tz_name [64] = "PST"
static char	tz_dst_name [64] = "PDT"
long	dst_begin = 0
long	dst_end = 0
char *	_tzname [2]
int	_daylight = 0
long	_timezone = 28800
long	_dstbias = 0

Function Documentation

__p__daylight()

void * __p__daylight

(

void

)

Definition at line 37 of file timezone.c.

{
   return &_daylight;
}

__p__dstbias()

long * __p__dstbias

(

void

)

Definition at line 69 of file timezone.c.

{
    return &_dstbias;
}

__p__timezone()

long * __p__timezone

(

void

)

Definition at line 53 of file timezone.c.

{
   return &_timezone;
}

__p__tzname()

char ** __p__tzname

(

void

)

Definition at line 79 of file timezone.c.

{
    return _tzname;
}

_get_tzname()

int CDECL _get_tzname	(	size_t *	ret,
		char *	buf,
		size_t	bufsize,
		int	index
	)

Definition at line 220 of file timezone.c.

{
    char *str_timezone;
 
    switch (index)
    {
    case 0:
        str_timezone = tz_name;
        break;
 
    case 1:
        str_timezone = tz_dst_name;
        break;
 
    default:
        *_errno() = EINVAL;
        return EINVAL;
    }
 
    if (!ret || (!buf && (bufsize > 0)) || (buf && !bufsize))
    {
        *_errno() = EINVAL;
        return EINVAL;
    }
 
    *ret = strlen(str_timezone) + 1;
    if(!buf && !bufsize)
        return 0;
 
    strncpy(buf, str_timezone, bufsize);
    return 0;
}

_tzset()

void _tzset

(

void

)

Definition at line 92 of file timezone.c.

{
    const char * str;
 
    if (_tz_is_set)
    {
        return;
    }
 
    /* Try to read the timezone from environment */
    str = getenv("TZ");
    if (str && str[0] != 0)
    {
        long hour = 0, min = 0, sec = 0;
        size_t len = strnlen(str, 16);
        int sign = 1;
 
        dst_begin = 0;
 
        for (;;)
        {
            /* Copy timezone name */
            strncpy(tz_name, str, 3);
            str += 3;
            len -= 3;
 
            if (len < 1) break;
 
            if (*str == '+' || *str == '-')
            {
                sign = *str == '-' ? -1 : 1;
                str++;
                len--;
            }
 
            if (len < 1) break;
 
            hour = atol(str);
 
            while (*str != 0 && *str != ':') str++;
            if (*str == 0) break;
 
            min = atol(++str);
 
            while (*str != 0 && *str != ':') str++;
            if (*str == 0) break;
 
            sec = atol(++str);
 
            while (*str != 0 && *str <= '9') str++;
            if (*str == 0) break;
 
            /* Copy DST name */
            strncpy(tz_dst_name, str, 3);
 
            // FIXME: set dst_begin etc
 
            /* We are finished */
            break;
        }
 
        _timezone = sign * (((hour * 60) + min) * 60 + sec);
 
    }
    else
    {
        TIME_ZONE_INFORMATION tzi;
        DWORD ret;
 
        ret = GetTimeZoneInformation(&tzi);
        if (ret == TIME_ZONE_ID_INVALID)
        {
            return;
        }
 
        ret = WideCharToMultiByte(CP_ACP,
                                  0,
                                  tzi.StandardName,
                                  -1,
                                  tz_name,
                                  sizeof(tz_name),
                                  NULL,
                                  NULL);
 
        ret = WideCharToMultiByte(CP_ACP,
                                  0,
                                  tzi.DaylightName,
                                  -1,
                                  tz_dst_name,
                                  sizeof(tz_dst_name),
                                  NULL,
                                  NULL);
 
        _timezone = tzi.Bias * 60;
 
        if (tzi.DaylightDate.wMonth)
        {
            struct tm _tm;
 
            _daylight = 1;
            _dstbias = (tzi.DaylightBias - tzi.StandardBias) * 60;
            _tm.tm_year = 70;
            _tm.tm_mon = tzi.DaylightDate.wMonth - 1;
            _tm.tm_mday = tzi.DaylightDate.wDay;
            _tm.tm_hour = tzi.DaylightDate.wHour;
            _tm.tm_min = tzi.DaylightDate.wMinute;
            _tm.tm_sec = tzi.DaylightDate.wSecond;
            dst_begin = (long)_mkgmtime(&_tm);
            _tm.tm_mon = tzi.StandardDate.wMonth - 1;
            _tm.tm_mday = tzi.StandardDate.wDay;
            _tm.tm_hour = tzi.StandardDate.wHour;
            _tm.tm_min = tzi.StandardDate.wMinute;
            _tm.tm_sec = tzi.StandardDate.wSecond;
            dst_end = (long)_mkgmtime(&_tm);
        }
        else
        {
            _daylight = 0;
            _dstbias = 0;
        }
 
    }
    _tz_is_set = 1;
}

Variable Documentation

_daylight

int _daylight = 0

Definition at line 30 of file timezone.c.

Referenced by __p__daylight(), and _tzset().

_dstbias

long _dstbias = 0

Definition at line 62 of file timezone.c.

Referenced by __p__dstbias(), and _tzset().

_timezone

long _timezone = 28800

Definition at line 46 of file timezone.c.

Referenced by __p__timezone(), and _tzset().

_tz_is_set

char _tz_is_set = 0

Definition at line 10 of file timezone.c.

Referenced by _tzset(), and localtime().

_tzname

char* _tzname[2]

Initial value:

= {
  tz_name,
  tz_dst_name,
}

Definition at line 22 of file timezone.c.

Referenced by __p__tzname().

dst_begin

long dst_begin = 0

Definition at line 16 of file timezone.c.

Referenced by _gmtime_worker(), and _tzset().

dst_end

long dst_end = 0

Definition at line 17 of file timezone.c.

Referenced by _gmtime_worker(), _tzset(), HLPFILE_Uncompress3(), lznt1_decompress(), lznt1_decompress_chunk(), and RtlpCompressBufferLZNT1().

tz_dst_name

char tz_dst_name[64] = "PDT"

static

Definition at line 14 of file timezone.c.

Referenced by _get_tzname(), and _tzset().

tz_name

char tz_name[64] = "PST"

static

Definition at line 13 of file timezone.c.

Referenced by _get_tzname(), and _tzset().