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#include "psitime.h"
#include <stdlib.h>
PsiTime::PsiTime(void) {
ptzValid = false;
setUnixNow();
}
PsiTime::PsiTime(time_t time) {
ptzValid = false;
gettimeofday(NULL, &utz);
setUnixTime(time);
}
PsiTime::PsiTime(psi_timeval *_ptv, psi_timezone *_ptz) {
if (_ptv != 0L)
ptv = *_ptv;
if (_ptz != 0L) {
ptz = *_ptz;
ptzValid = true;
} else
ptzValid = false;
/* get our own timezone */
gettimeofday(NULL, &utz);
psi2unix();
}
PsiTime::PsiTime(const unsigned long _ptvHi, const unsigned long _ptvLo) {
ptv.tv_high = _ptvHi;
ptv.tv_low = _ptvLo;
ptzValid = false;
/* get our own timezone */
gettimeofday(NULL, &utz);
psi2unix();
}
PsiTime::PsiTime(struct timeval *_utv = 0L, struct timezone *_utz = 0L) {
if (_utv != 0L)
utv = *_utv;
if (_utz != 0L)
utz = *_utz;
unix2psi();
}
PsiTime::PsiTime(const PsiTime &t) {
utv = t.utv;
utz = t.utz;
ptv = t.ptv;
ptz = t.ptz;
ptzValid = t.ptzValid;
}
PsiTime::~PsiTime() {
}
void PsiTime::setUnixTime(struct timeval *_utv) {
if (_utv != 0L)
utv = *_utv;
unix2psi();
}
void PsiTime::setUnixTime(time_t time) {
utv.tv_sec = time;
utv.tv_usec = 0;
unix2psi();
}
void PsiTime::setUnixNow(void) {
gettimeofday(&utv, &utz);
unix2psi();
}
void PsiTime::setPsiTime(psi_timeval *_ptv) {
if (_ptv != 0L)
ptv = *_ptv;
psi2unix();
}
void PsiTime::setPsiTime(const unsigned long _ptvHi, const unsigned long _ptvLo) {
ptv.tv_high = _ptvHi;
ptv.tv_low = _ptvLo;
psi2unix();
}
void PsiTime::setPsiZone(psi_timezone *_ptz) {
if (_ptz != 0L) {
ptz = *_ptz;
ptzValid = true;
}
psi2unix();
}
struct timeval &PsiTime::getTimeval(void) {
return utv;
}
time_t PsiTime::getTime(void) {
return utv.tv_sec;
}
psi_timeval &PsiTime::getPsiTimeval(void) {
return ptv;
}
const unsigned long PsiTime::getPsiTimeLo(void) {
return ptv.tv_low;
}
const unsigned long PsiTime::getPsiTimeHi(void) {
return ptv.tv_high;
}
PsiTime &PsiTime::operator=(const PsiTime &t) {
utv = t.utv;
utz = t.utz;
ptv = t.ptv;
ptz = t.ptz;
ptzValid = t.ptzValid;
return *this;
}
ostream &operator<<(ostream &s, const PsiTime &t) {
const char *fmt = "%c";
char buf[100];
strftime(buf, sizeof(buf), fmt, localtime(&t.utv.tv_sec));
s << buf;
return s;
}
/**
* The difference between
* EPOC epoch (01.01.0001 00:00:00)
* and Unix epoch (01.01.1970 00:00:00)
* in microseconds.
*/
#define EPOCH_DIFF 0x00dcddb30f2f8000ULL
static unsigned long long
evalOffset(psi_timezone ptz, time_t time, bool valid) {
unsigned long long offset = 0;
if (valid) {
offset = ptz.utc_offset;
if ((ptz.dst_zones & 0x40000000) || (ptz.dst_zones & ptz.home_zone))
offset += 3600;
} else {
/**
* Fallback. If no Psion zone given, use
* environment variable PSI_TZ
*/
const char *offstr = getenv("PSI_TZ");
if (offstr != 0L) {
char *err = 0L;
offset = strtoul(offstr, &err, 0);
if (err != 0L && *err != '\0')
offset = 0;
} else {
/**
* Fallback. If PSI_TZ is not set,
* use the local timezone. This assumes,
* that both Psion and local machine are
* configured for the same timezone and
* daylight saving.
*/
struct tm *tm = localtime(&time);
offset = timezone;
if (tm->tm_isdst)
offset += 3600;
}
}
offset *= 1000000;
return offset;
}
void PsiTime::psi2unix(void) {
unsigned long long micro = ptv.tv_high;
micro = (micro << 32) | ptv.tv_low;
/* Substract Psion's idea of UTC offset */
micro -= EPOCH_DIFF;
micro -= evalOffset(ptz, micro / 1000000, ptzValid);
utv.tv_sec = micro / 1000000;
utv.tv_usec = micro % 1000000;
}
void PsiTime::unix2psi(void) {
unsigned long long micro = utv.tv_sec * 1000000 + utv.tv_usec;
/* Add Psion's idea of UTC offset */
micro += evalOffset(ptz, utv.tv_sec, ptzValid);
micro += EPOCH_DIFF;
ptv.tv_low = micro & 0x0ffffffff;
ptv.tv_high = (micro >> 32) & 0x0ffffffff;
}
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